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livglam06 · 1 year ago
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Transform Your Skin with the Best Glutathione Injection for Skin Whitening in Bangalore | Livglam
Discover radiant skin with Livglam's advanced Glutathione IV Skin Lightening treatment in Bangalore. Learn about the cost and price of glutathione injection for permanent skin whitening. Choose the best skin whitening treatment in Bangalore and unveil a brighter you. 
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carservices1 · 1 month ago
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How Can You Achieve Radiant Skin? Dermatologist Tips and Tricks
Radiant skin is the ultimate goal for many, symbolizing health, youth, and vitality. Achieving a glowing complexion requires more than just good genes; it involves a consistent skincare routine, healthy lifestyle choices, and sometimes professional treatments. In this blog, we’ll explore dermatologist-approved tips and tricks to help you achieve and maintain radiant skin.
Understanding Radiant Skin
Radiant skin is characterized by a smooth texture, even tone, and a natural glow. It reflects light well, appears hydrated, and is free from blemishes, dullness, and signs of aging. The key to radiant skin lies in maintaining a healthy skin barrier, boosting hydration, and protecting against environmental damage.
Essential Steps to Achieve Radiant Skin
Start with a Clean Canvas The foundation of radiant skin is cleanliness. Proper cleansing removes dirt, oil, and impurities that can clog pores and dull the complexion.
Use a Gentle Cleanser: Choose a sulfate-free, pH-balanced cleanser that effectively removes impurities without stripping the skin of its natural oils.
Double Cleansing: For those who wear makeup or live in polluted areas, double cleansing (using an oil-based cleanser followed by a water-based one) ensures all residue is thoroughly removed.
Exfoliate Regularly Exfoliation is crucial for removing dead skin cells that can accumulate on the surface, leading to a dull complexion.
Chemical Exfoliants: AHAs (like glycolic acid) and BHAs (like salicylic acid) dissolve dead skin cells and promote cell turnover. Use them 2-3 times a week for best results.
Physical Exfoliants: Gentle scrubs can be used once a week to manually slough off dead skin, but be cautious not to overdo it, as excessive scrubbing can damage the skin barrier.
Hydrate, Hydrate, Hydrate Hydration is key to maintaining a plump, youthful appearance.
Use a Hydrating Serum: Serums containing hyaluronic acid, glycerin, or aloe vera draw moisture into the skin, keeping it hydrated throughout the day.
Moisturize Twice Daily: Apply a moisturizer suitable for your skin type morning and night to lock in hydration and protect the skin barrier.
Advanced Skin Treatments for Radiance
Skin Lightening Treatment in Bangalore If you're looking to enhance your skin’s glow, skin lightening treatment in Bangalore can help brighten your complexion and reduce pigmentation issues. This treatment aims to lighten dark spots, giving your skin a uniform, radiant look.
Tan Removal Treatment in Bangalore Overexposure to the sun can lead to tanning and dull skin. Tan removal treatment in Bangalore focuses on removing sun-induced pigmentation, leaving your skin lighter and more even-toned.
Pigmentation Treatment in Bangalore Uneven skin tone, dark spots, and melasma are common concerns. Pigmentation treatment in Bangalore involves targeted therapies like chemical peels and laser treatments to reduce pigmentation, helping you achieve a flawless complexion.
Best Skin Whitening Treatment in Bangalore If you're seeking significant results, the best skin whitening treatment in Bangalore combines advanced therapies like glutathione injections and lasers, helping you achieve a brighter and more radiant complexion.
Nourish from the Inside Out
Skin Whitening Treatment Cost in Bangalore Curious about the investment? The skin whitening treatment cost in Bangalore varies depending on the clinic and treatment type but is well worth the transformation in your skin’s appearance.
Permanent Skin Whitening Treatment Cost in Bangalore For those looking for lasting results, permanent skin whitening treatment cost in Bangalore may be higher, but it offers long-term improvements to your complexion with fewer maintenance sessions.
Melasma Treatment in Bangalore Hormonal imbalances or sun exposure can lead to melasma, causing patches of discoloration. Melasma treatment in Bangalore is designed to reduce these patches and restore an even skin tone, giving you a smooth, radiant look.
Professional Tips to Enhance Your Glow
Pimple Treatment in Bangalore Pimples and acne can ruin your skin's glow. Luckily, pimple treatment in Bangalore offers specialized care to treat acne, reduce inflammation, and prevent future breakouts, ensuring your skin stays clear and radiant.
Best Pimple Treatment in Bangalore Looking for the most effective options? The best pimple treatment in Bangalore includes chemical peels, oral medications, and laser therapies to target the root causes of acne and restore your skin’s natural radiance.
Anti-Ageing Treatment in Bangalore Fine lines and wrinkles can make your skin look dull and aged. Anti-ageing treatment in Bangalore offers solutions like Botox, fillers, and laser treatments to smooth wrinkles and restore youthful glow.
Wrinkle Treatment in Bangalore If wrinkles are your main concern, wrinkle treatment in Bangalore focuses on reducing the appearance of deep lines and creases, helping you maintain a smooth, youthful complexion.
Get Professional Help
Sometimes, achieving radiant skin requires a little extra help from a dermatologist.
Chemical Peels: These treatments exfoliate the skin more deeply than at-home products, revealing fresh, glowing skin.
Laser Therapy: Laser treatments can target pigmentation, scars, and fine lines, enhancing overall skin radiance.
Microdermabrasion: This non-invasive procedure gently exfoliates the top layer of skin, promoting a smoother and more radiant complexion.
Common Mistakes That Dull Your Radiance
Even with the best intentions, certain habits can sabotage your efforts to achieve glowing skin. Here are a few mistakes to avoid:
Over-Exfoliating Excessive exfoliation can damage your skin barrier, leading to irritation, redness, and dullness. Stick to exfoliating 2-3 times a week.
Neglecting Sun Protection Skipping sunscreen is one of the quickest ways to dull your skin. Always apply SPF, even on cloudy days.
Using Harsh Products Products with harsh chemicals or high alcohol content can strip your skin of its natural oils, leading to dryness and a lackluster appearance.
Inconsistent Routine Consistency is key. Skipping steps in your skincare routine or frequently changing products can disrupt your skin’s balance, making it harder to achieve radiant skin.
FAQs: Achieving Radiant Skin
Q: How long does it take to see results from a skincare routine? A: Generally, it takes about 4-6 weeks to see visible improvements in your skin. Patience and consistency are essential.
Q: Can diet really affect my skin’s radiance? A: Yes, a diet rich in antioxidants, vitamins, and healthy fats can significantly improve your skin's health and glow.
Q: What is the best way to treat dull skin? A: Regular exfoliation, proper hydration, and the use of brightening products like vitamin C can help revive dull skin.
Q: Is professional treatment necessary for radiant skin? A: While a good at-home routine can work wonders, professional treatments like chemical peels or laser therapy can provide an extra boost.
Conclusion
Achieving radiant skin is a combination of consistent skincare, healthy lifestyle choices, and sometimes professional interventions. By following these dermatologist-approved tips and avoiding common pitfalls, you can enjoy a glowing, healthy complexion year-round. For personalized skincare advice and treatments, visit VTIARA HAIR & SKIN CLINIC (explore our services at https://vtiaraclinic.com/) and let our experts guide you on your journey to radiant skin.
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tamazglobalblog · 3 years ago
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Effects and benefits in Liquid Glutathione Injection
Glutathione Breakthrough in Therapy
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One of the biggest advancements in Glutathione Injection is the fact that the medication that is used to treat Parkinson's disease, like Levodopa that can cause a range of adverse effects, can frequently be reduced or even eliminated completely. However, there is no reason why a patient should cease taking prescribed medications unless instructed by their doctor, however when it comes to Glutathione therapy, studies have shown it is possible to do this. possibility. If you suffer from Parkinson's disease or another disease identified and you find that your the treatment you are currently receiving isn't providing you with the relief you require and relief, then Glutathione therapy might be the ideal solution.
In the last few years the treatment is becoming popular among doctors and may be the solution you require. If a person with Parkinson's disease is treated with IV Glutathione therapy if they are able to respond to the treatment it will be hooked for the rest of their life however, if it helps patients to recover some of their normal functioning this is a tiny cost to pay. Since it is the first FDA approved treatment physicians and patients are excited over the numerous advancements made with Glutathione therapy. Although Parkinson's is the main patient for IV Glutathione therapy, it has also demonstrated promise for treatments for irritable bowel disorder, chronic fatigue syndromeand fibromyalgia as well as other diseases. In the case of patients who have undergone Glutathione treatment, as high like 90% experienced significant changes. What happens in this specific disorder can be seen in the way that receptors for dopamine decrease their sensitivity. In this treatment, dopamine inside the brain can function more efficiently. This means that the sensitivity of dopamine is enhanced, as are the levels of serotonin in the brain that will help to reduce the degrees of depression.
Effects Of Liquid Glutathione
Understanding the effects on Liquid Glutathione When you choose to try the liquid Glutathione it is recommended that starting by taking the 100 milligram dose before gradually increasing it up to 500. But, there are supplements available in 1800 milligrams , but in the latter case, you must consult your physician before taking that large of dosage. It is the Glutathione liquid Glutathione also known as Glutathione injection, when combined with a healthy diet, regular exercise and a relaxed lifestyle could make a significant and positive influence on your life.
Glutathione is an organic protein that is produced by the body. It can be replenished in a certain amount through food. The body's cells produce it This protein is crucial to healthy health and helps keep the immune system functioning at an the highest level of functioning. If there's a deficiency of Glutathione then all kinds of health issues could develop. Since the beginning doctors have utilized Glutathione in the form of IVs for treating patients. In time the Glutathione injection was developed which is still extremely efficient. But as people began to take notice research teams attempted to make supplements, but soon were faced with difficulties. Glutathione is too big to traverse into the wall of your intestinal tract, with supplements becoming destroyed within your digestive tract.
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Dr James Glutathione Injection | Skin Whitening Injection
Dr James Glutathione Injection 1500mg Skin Whitening Injection is not only the highest quality of Reduced Glutathione but also has the highest strength of the skin whitening formula available on the market.
[email protected] Ph No-9988227622,9900746748
Location-Promenade Road,Frazer Town,Bangalore,India,560005
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lupinepublishers-ado · 4 years ago
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Potentiation of Activity of Benfotiamine Co Administered with Thyroxine in Diabetes Induced Peripheral Neuropathy in Rats
Lupine Publishers|  Archives of Diabetes & Obesity
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Abstract
Diabetic peripheral neuropathy (DPN) is a multi-etiological microvascular complication. Prolong hyperglycemia leads to formation of advance glycation end product (AGE) and oxidative stress which are contributors of nerve dysfunction. DPN manifests as pain, slowing of nerve conduction velocity (NCV), sensory loss etc. The aim of the present study is to evaluate the individual and combined protective effect of benfotiamine (BT) and thyroxine (T4) against Streptozotocin (STZ) induced DPN in rats. After 48 hours of a single injection of STZ (60 mg/kg bw i.p) diabetic rats were administered BT (100 mg/kg p.o.), T4 (1mg/kg.s.c,) and their combination. Diabetic rats at 5th week, exhibited significant decrease in body weight, hyperalgesia, decreased muscle coordination, grip strength and NCV. Antioxidant activity of reduced glutathione (GSH), catalase (CAT), superoxide dismutase (SOD) was also found to be significantly decreased. Significant higher levels of glycosylated hemoglobin (GHb) and Malondialdehyde (MDA) were also observed in diabetic rats. Treatment with BT, T4 and their combination attenuated the decrease in level of nociceptive threshold, muscle coordination, grip strength.
NCV and antioxidant activity. Significant decrease in the elevated levels of GHb and MDA was also observed. A histopathological study of sciatic nerve also confirmed the improvement in cell architecture as compared to diabetic rats and has strengthened the neuroprotective effect of BT and T4 combination group. An improved In Vitro AGE inhibitory activity of BT, T4 and their combination was observed. These finding suggested that BT, T4 and their combination exerts a protective effect in progression of diabetic neuropathy by decreasing GHb, AGE formation and oxidative stress.
Keywords:Micro vascular; NCV; Antioxidant; AGE; Thyroxine; Benfotiamine
Abbreviations:DM: Diabetes mellitus; DPN: Diabetic Peripheral Neuropathy; MAPK: Mitogen Activated Protein Kinase; NCV: Nerve Conduction Velocity; TH: Thyroid Hormones; BT: Benfotiamine; AGE: Advance Glycation End Product; LPO: Lipid Peroxidation; SOD: Superoxide Dismutase; CAT: Catalase; GSH: Glutathione; TBARS: Thiobarbituric Acid Reactive Substances; BSA: Bovine Serum Albumin; PKC: Protein Kinase C; ROS: Reactive Oxygen Species
Introduction
Diabetes mellitus (DM) is a worldwide major health problem and it is a chronic metabolic disorder characterized by hyperglycemia resulting from inadequate secretion or impaired action of endogenous insulin. The prevalence of diabetes is increasing worldwide and is believed to increase to 300 million by the year 2030 [1]. Uncontrolled or persistent hyperglycemia in DM leading to several microvascular and microvascular complications. Diabetic peripheral neuropathy (DPN) is a common microvascular complication of DM affecting more than 50% of the diabetic patients [2]. The pathogenesis of DPN is considered to be complex and multifactorial resulting from contributions of various pathways including metabolic and vascular factors, which consists of activation of polyol pathway, advanced glycation end products pathway, hexosamine pathway, increased activity of mitogen-activated protein kinase (MAPK), protein kinase C, poly (ADP-ribose) polymerase, oxidative stress, apoptosis, impaired neurotrophic support, autoimmunity, inflammation, up regulation of endothelin [3]. The impairment of nerve function is a well-established early manifestation of diabetes both clinically and in experimental animal models. DPN causes dysfunction of small and large nerve fibers and negatively impacts quality of life in diabetic patients. Small-fiber peripheral neuropathy is characterized by behavioral abnormalities (cold, thermal hyperalgesia, loss of grip strength and motor incoordination and burning or lancinating pain, and predisposition to foot ulceration). Large-fiber dysfunctions include loss of position and vibration sensation, nerve-conduction abnormalities, and distal muscle weakness. Early disorders of nerve function include slowing in nerve conduction velocity (NCV), followed by axonal degeneration, axoglial disjunction, paranodal and loss of fibre density. Microangiopathy [4]. A number of different agents from diverse chemical classes have entered clinical trials for the treatment of metabolic abnormalities in DPN, but only few approved for clinical use while other drugs either ineffective or withdrawn [2]. Current treatment options for symptomatic treatment of DPN include antidepressants, anticonvulsants. These agents are modestly effective for symptomatic relief, but they neither affect the underlying pathology nor do they slow progression of the disease [5]. Hence a novel approach to bridge the gap in selecting the compound in treatment of DPN was used .The discovery of use of a drug for a new indication is an arbitrary process, as shown by many past examples like the use of zinc acetate for the treatment of Wilson’s disease [6], arsenic for acute promyelocytic leukemia [7], amphotericin B for leishmaniasis [8], and thalidomide for multiple myeloma [9]. The discovery of these “alternative” uses for drugs different from originally intended drug development process is referred to as drug repurposing or repositioning. Repositioning of drug efforts has many advantages, because the pharmacokinetics and pharmacodynamics of the drug are known, repositioning discoveries are less costly and quicker than traditional discovery efforts [10], which usually take 10-15 years [11], and cost upward of $1 billion [12], Although physicians and pharmaceutical/ biotechnology companies have manual methods and prior knowledge that enable them to carry out drug repositioning clinical trials, such successful repositioning of drugs is often serendipitous and rare. In this study we have selected thyroxine to explore for its activity in DPN. Thyroid hormones (TH) [T4 (tetraiodothyronine) and T3 (triiodothyronine)], the only iodine-containing compounds with biological activity [13]. TH stimulate synthesis of Na+/K+ ATPase and also regulates metabolism by stimulating protein synthesis and increase the use of glucose and fatty acids for ATP production. They also increase lipolysis and enhance cholesterol excretion [14]. The cardiac side effect of D isomer of thyroxine resulted discontinuation of the clinical uses of this hormone. Under normal conditions, about 41%of thyroxine is converted to T3, and about 21% is converted to metabolically inactive 3,3,5-triiodothyronine (reverseT3, rT3). T3 is a powerful inducer of pancreatic acinar cell proliferation in rodents [15]. In Vitro studies of human and rodent insulinoma cell lines showed that T3 protected from apoptosis and induces β-cell growth and proliferation [16]. A serendipitous, positive association between serum-FT3 (free tri iodothyronine) and an estimate of insulin production was found in euthyroid, lean, healthy individuals [17].Treatment of Human pancreatic duct cells (hPANC-1)with T3 induced changes in cell morphology, promotes cell differentiation into insulin-producing β-cells, unregulated insulin and glucose transporter protein-2 transcripts, and increases insulin release into the medium. TH receptor has been identified in pancreatic β -cell lines [18,19], T3-enhanced insulin release in isolated rat pancreatic islets exposed to glucose concentrations of 2-8 mmol/l, had no effect at concentrations of 12 mmol/l, and inhibited insulin release at concentrations of 16.6 mmol/l [20]. T3 promoted expression of important proteins involved in both glucose and lipid metabolism that may influence insulin secretion [21]. Benfotiamine (BT), a lipid soluble vitaminB1 with much higher bioavailability than thiamine [5] Benfotiamine was shown to prevent experimental diabetic retinopathy and In Vitro hyperglycemia-induced endothelial dysfunction. The effects of benfotiamine on in vivo endothelial function remained unknown [22]. Therefore, the present study was designed to evaluate whether diabetes induced DPN can be reversed by treatment with thyroxine and BT.
Materials and Methods
Experimental Animals
In-house laboratory bred healthy Wistar rats of weighing 200-250g were included for the study. Animals were housed in polypropylene cages on clean paddy husk bedding. Animals were maintained under controlled temperature at 25°C± 2°C with 12hr light/dark cycle with food and water provided ad labium. Animals which do not comply with above criteria, and which are found to be diseased will be excluded from the study. Before conducting the experiment, ethical clearance was obtained from “Institutional animal ethics committee” Al-Ameen College of Pharmacy”, Bangalore. Approval No: AACP/P-48.
Drugs and Reagents
Thyroxine (gift sample from Apotex Pharmachem India Pvt. Ltd.), benfotiamine (gift sample from Strides Arco Lab Pvt.Ltd.) were used in the present investigation. Streptozotocin (STZ) was purchased from Sigma Aldrich. Commercial diagnostic kit for the estimation of serum glucose was obtained from Span Diagnostics Ltd. Glycosylated hemoglobin kit was obtained from Crest Biosystems Pvt. Ltd. Other chemicals and reagents were of analytical grade and purchased from local suppliers.
Design of the Experiment
Induction of Diabetic Peripheral Neuropathy: After an overnight fast, Wistar rats were administered a single injection of streptozotocin [60 mg/kg of body weight i.p.in 100 mM sodium citrate buffers, pH 4.5] [23]. After 48 hours, animals with fasting blood glucose levels higher than 250mg/dl were selected for the study.
Experimental Procedure
Rats were randomly assigned in six groups (n=6)
Group1: Normal Control
Group2: Diabetic Control
Group3: Diabetic Control+ T4 (1mg/kg.s.c) [24] thrice a week for 5 weeks
Group4: Diabetic Control+ BT (100 mg/kg p.o.) [25] daily for 5 weeks
Group5: Diabetic Control +BT (100 mg/kg p.o.)+T4 (1mg/ kg.s.c,) for 5 weeks
For preventive studies treatment was started from day 2 of STZ administration along with insulin (3IU/kg, s.c) [26]. 5 weeks post treatment various behavioral, biochemical, electrophysiological and histopathological parameters were studied.
Behavioral Studies
Thermal and Cold Hyperalgesia [27,28]: Thermal and cold hyperalgesia were measured using the tail-immersion test in water maintained at high (46ºC) or low (4ºC) temperature. The duration of tail immersion was recorded, and a cut-off time of 15 s was used.
Measurement of Muscle Incoordination Using Rota Rod [28,29]: Rota rod has been used to evaluate motor coordination by testing the ability of rats to remain on a revolving rod. The apparatus has a horizontal rough metal rod of 3 cm diameter attached to a motor with variable speed. This 70 cm long rod was divided into four sections by wooden partitions. The rod was placed at a height of 50 cm to discourage the animals to jump from the rotating rod. The rate of rotation was adjusted in such a manner that it allowed the normal rats to stay on it for 5 min. Each rat was given five trials before the actual reading was taken. The readings were taken at15, 25, rpm after treatment in all groups of rats.
Measurement of grip strength [29,30]: Grip strength meter was used for evaluating grip strength of animals. Before commencement of experiment, the animals were acclimatized by placing on the instrument for some time to train, and then rats were held by the tail above the grid of grip strength meter. The animal was moved until its front legs were grasped the grid and it was brought to an almost horizontal position. The base of the tail was then pulled following the axle of the sensor until it released the grid. The force achieved by the animal was then displayed on the screen and was recorded as new tons or kg units.
Biochemical Studies
Estimation of GHb [30,31]: At the end of study (5 weeks) blood was withdrawn through retroorbital plexus of overnight fasted rat under light ether anesthesia using a glass capillary and collected in EDTA tubes. The glycosylated hemoglobin was determined by using kit. A hemolysed preparation of whole blood is mixed continuously for 5 minutes with a weakly binding cation-exchange resin. The labile fraction is eliminated during the hemolysate preparation and during the binding. During this mixing, HbAo binds to the ion exchange resin leaving GHb free in the supernatant. After the mixing period, a filter separator is used to remove the resin from the supernatant. The percent GHb is determined by measuring absorbance of the GHb fraction & the total hemoglobin (THb) fraction. The ratio of the absorbance of the GHb & the THb fraction of the Control and the Test is used to calculate the percent GHb of the sample using below formula.
Preparation of Nerve Homogenate: A segment of sciatic nerve, approximately 1.5 cm in length, 5mm proximal and 5 mm distal was used for preparing the 10% w/v homogenates for biochemical estimation. Tissue homogenates were prepared in 0.1M phosphate buffer (pH 7.4). The homogenate was centrifuged at 1000 rpm 4ºC for 3 min and the supernatant divided into two portions, one of which was used for measurement of lipid peroxidation (LPO) and the remaining supernatant was again centrifuged at 12,000 rpm at 4ºC for 15 min and used for the measurement of lipid peroxidation (LPO), superoxide dismutase (SOD), catalase (CAT) and glutathione (GSH).
Measurement of Lipid Peroxidation: The extent of lipid peroxidation in terms of thiobarbituric acid reactive substances (TBARS) formation was measured according to the method of Esterbauer and Cheeseman. Tissue extracts were mixed separately with 1ml TCA (20%), 2ml TBA (0.67%) and heated for 1h at 100°C, after cooling, the precipitate was removed by centrifugation. The absorbance of each sample was measured at 535 nm using a blank containing all the reagents except the sample. As 99% TBARS are malondialdehyde (MDA), so TBARS concentrations of the samples were calculated using the extinction coefficient of MDA, which is1.56 x 105 M-1 cm-1 and were expressed as μM of malondialdehyde per mg protein [31-34].
Estimation of Superoxide Dismutase (SOD) and Catalase Activity: Sciatic nerve homogenate was centrifuged at 4°C, 17,500×g for 10min. Supernatant was used for the measurement of SOD activity by pyrogallol autooxidation method [35,32] and catalase activity by H2O2 degradation method, which is a quantitative spectroscopic method developed for following the breakdown of H2O2 at 240nm in unit time. The sample readings were taken by placing 1ml of phosphate buffer and 100 μl of tissue homogenate in the reference cuvette and 1 ml of H2O2 and 100 μl of homogenate in the test cuvette in the spectrophotometer. For each measurement, the reading was taken at 240nm 1min after placing the cuvettes in Shimadzu spectrophotometer [36,33].
Measurement of Reduced Glutathione Activity: Reduced glutathione was assayed by the method of Van Dooran [37,34]. Briefly1.0 ml of sciatic nerve homogenate (10%w/v) was precipitated with 1.0 ml of sulphosalicylic acid (4%). The samples were kept at 4°C for at least 1h and then subjected to centrifugation at 1200g for 15min at 4°C.The assay mixture contained 0.1 ml supernatant,2.7 ml phosphate buffer (0.1M, pH 7.4) and 0.2 ml 5,5, dithiopyrs (2-nitro benzoic acid) (Ellman’s reagent, 0.1 mM, pH 8.0) in a total volume of 3.0 ml. The yellow color developed was read immediately at 412nm and the reduced GSH levels were expressed as μg/mg protein.
Electrophysiological Studies
Isolation of Sciatic Nerve: The rats were sacrificed by administration of overdose of ketamine/xylazine i.p. After anesthesia, rat backs were shaved and NCV was recorded. Briefly incision was made at L4-L6 spinal segments. The sciatic nerves were surgically exposed from sciatic notch to the gastrocnemius tendon and the left and right sciatic nerves were rapidly removed, carefully impregnated on fine filter paper to remove any accompanying blood soaked for 10 minutes in Ringer-Locke buffer to prevent spontaneous firing of the nerve.
Measurement of Nerve Conduction Velocity (NCV): The rats were anesthetized by administration of thiopentone sodium, 30mg/kg, and i.p [1]. After anesthesia, rat backs were shaved and motor NCV was recorded. Briefly incision was made at L4-L6 spinal segments. The sciatic nerves were surgically exposed from sciatic notch to the gastrocnemius tendon and the left and right sciatic nerves were rapidly removed, carefully impregnated on fine filter paper to remove any accompanying blood soaked for 10 minutes in Ringer-Locke buffer to prevent spontaneous firing of the nerve [32].The left sciatic nerves were then placed in a moist nerve chamber (MLT016/B AD Instruments, Australia) to measure NCV. NCV was measured by stimulating proximally at the sciatic notch by stimulating electrode (MLA270 AD Instruments, Australia) with 10 mV at 1Hz to 5 Hz and the action potential was measured using recording electrodes (MLA 285) by placing distally to the sciatic knottins was calculated by distance between stimulating and recording electrodes divided by the latency. Right sciatic nerves were transferred into Glutaraldehyde solution for histopathological studies and rinsed with ice cold saline homogenized in chilled phosphate buffer (pH 7.4) and used to assay lipid peroxidation, reduced glutathione and catalase [33,35].
Histopathological Studies
The right sciatic nerves were isolated and transferred in to 0.05mol/L phosphate buffered (30g/L) glutaraldehyde solution for histopathological studies (H&E staining, Kulchitsky Pal staining and Massion’s trichome) [36,37].
To determine In Vitro glycation of protein bovine serum albumin (BSA)-glucose assay was performed based on the procedure of Brownlee et al. BSA (l0mg/mL) was incubated with glucose (500mM) in phosphate buffered-saline (pH 7.4) and extract containing sodium azide (0.02%) at 37ºC with a final concentrations of BSA (2mg/mL), glucose (40mM), sample (0.1 to 0.5mg/mL). Sterilization of reagents and samples were done by filtration through 0.2μm membrane filters. Aminoguanidine was used as an inhibitor positive control and a reactions without any inhibitor were also setup. All the samples and positive control were kept for incubation at 37ºC for 15 days. After 15 days of incubation, fluorescence intensity (excitation wavelength of 370nm and emission wave-length of 440nm) was measured for the test solutions. Percent inhibition was calculated as follows: Inhibition %= Inhibition % = (1− ( As − Ab) ( Ac − Ab) ×100
Where As = fluorescence of the incubated mixture with sample, Ac, Ab = are the fluorescence of the incubated mixture without sample as a positive control and the fluorescence of incubated mixture without sample as a blank control.
Statistical Analysis
Statistical evaluations were done by ANOVA, expressed as mean± S.E.M. followed by Bonferroni comparison test using Graph Pad In Stat (Ver.3.10) and Graph Pad Prism 5 computer programme.
Results
Assessment of General Toxicity
The percentage body weight of normal and diabetic rats treated with T4, BT and combination at 5th week was found to be 26.87±1.74g, -15.90 ± 0.769g,-6.433±0.493g.-6.635 ± 0.661,-5.150± 0.4366.The percentage of change of body weight of diabetic rats significantly less (<P0.001) as compared to normal control, similarly the percentage of change of body weight of diabetic treated rats was significantly less (<P0.001) as compared to diabetic control rats control (Figure 1).
Behavioral Studies
Thermal and Cold Hyperalgesia
The tail flick latencies in both hot and cold immersion test of diabetic rats significantly changed at 5th week in diabetic rats as compared to normal rats (P<0.001) . 5 weeks treatment with T4, BT and combination significantly improved P<0.001 cold and hot immersion performance. (Figures 2&3).
Measurement of Muscle Incoordination using Rota Rod
Time latencies at both 15, 25 rpm of normal rats was found to be 103.8±1.74,67.67±1.687 respectively, time latencies of diabetic rats at both 15,25 rpm was found to 75.5±1.176 38.83±0.307 and same were significantly reduced (P<0.001) as compared to normal control. Time latencies of diabetic rats treated with T4, BT and Combination at both 15, 25rpm was found to be 86.67±0.7149, 44.83±0.477, 86.83±0.792, 52.17±0.872, 91.5±0.846, 57.17±0.792 respectively and same were significantly P<0.001 improved (Figures 4&5).
Measurement of Grip Strength
The grip strength of normal rats was found to be 9.822±0.1332,27.97±0.1171 respectively, The grip strength of diabetic rats was found to be 75.5±1.176, 38.83±0.307 and same were significantly reduced (P<0.001) as compared to normal control. Time latencies of diabetic rats treated with T4, BT and combination at both 15,25 rpm was found to be 86.67±0.7149, 44.83±0.477,86.83±0.792,52.17±0.872,91.5±0.846,57.17±0.792 respectively and same were significantly P<0.001 improved (Figure 6).
Biochemical Studies
Estimation of GHb: The percentage of GHb of normal rats was found to be 4.577±0.0249, The percentage of GHb of diabetic rats was found to be 9.537±0.066, and same was significantly reduced ( P<0.001) as compared to normal control. The percentage of GHb of diabetic rats treated with T4, BT and combination was found to be 9.357±0.01838, 5.698±0.02561, 5.277±0.0261, respectively and same were significantly improved. P<0.05 when compared T4 treated diabetic rats with diabetic control. P<0.001 when compared BT, combination treated diabetic rats with diabetic control (Figure 7).
Measurement of Lipid Peroxidation: The sciatic nerve MDA levels of normal rats was found to 1.627±0.008433, The sciatic nerve of MDA levels diabetic rats was found to be significantly high (P<0.001) i.e 3.553±0.02860, The sciatic nerve MDA levels of diabetic rats treated with T4, BT and combination was found to be 3.235±0.008466, 3.368±0.009098, 4.080±0.01807, respectively and same were significantly (P<0.001) reduced (Figure 8).
Estimation of Superoxide Dismutase (SOD): Sciatic nerve SOD activity in normal rats was found to be 205.7±0.1078, Sciatic nerve SOD activity was significantly (P.001) low 106.8±0.2798 in 5 weeks diabetic rats. SOD activity of diabetic rats treated with T4, BT and combination were found to be 130.0±0.2540, 135.6±0.1474 and 128.5±3.212 treatment significantly (P<0.001) restored SOD activity when compared to diabetic control (Figure 9).
Estimation of Catalase: Sciatic nerve catalase activity in normal rats was found to be 0.1058± 0.0004, Sciatic nerve catalase activity was significantly (P.001) low 0.0545±0.0013 in 5 weeks diabetic rats. Catalase activity of diabetic rats treated with T4, BT and combination were found to be 0.08833±0.00230, 0.0950±0.00096and 128.5±0.00047 treatment significantly (P<0.001) restored catalase activity when compared to diabetic control (Figure 10).
Measurement of Reduced Glutathione Activity: Sciatic nerve glutathione content in normal rats was found to be 0.1058± 0.0004, Sciatic nerve catalase activity was significantly (P.001) low 0.0545±0.0013 in 5 weeks diabetic rats. Catalase activity of diabetic rats treated with T4, BT and combination were found to be 0.08833±0.00230, 0.0950±0.00096and 128.5±0.00047 treatment significantly (P<0.001) restored catalase activity when compared to diabetic control. (Figure 11).
Measurement of Nerve Conduction Velocity (NCV)
Sciatic nerve conduction velocity was significantly (<P0.001) was significantly reduced in 5 weeks diabetic rats 44.11± 0.2907 when compared to normal 53.13±0.4599, T4 treated diabetic rats significantly (P<0.01) exhibited improved NCV 45.72±0.1954. BT and combination both have also significantly improved (P<0.001) NCV 48.01±0.1954, 48.64±0.1876 (Figure 12).
In Vitro
Glycation of Proteins
AGEs formation after incubation at 37ºC for 15 days, with an IC50 value of BT, T4, combination and standard aminoguanidine was found out to be 166.6±0.45μg/ml,410.25±0.32μg/ml, 162.7±0.37 μg/ml, 322.4± 2.23 μg/ml respectively. The combination exhibited higher inhibitory activity i.e.162.7±0.37μg/ml against AGEs formation after incubation compare to aminoguanidine (Figure 13).
Discussion
The major findings of the present study were that STZ induced diabetic rats showed significant weight loss, muscle incoordination, thermal and cold hyperalgesia, decreased grip strength, increased % GHb, electrophysiological abnormalities like decreased NCV and histological abnormalities when compared to normal rats. Treatment of diabetic rats with T4, BT and combination significantly improved the diabetes induced above deficits. Our results indicated that rats with diabetes induced by STZ showed body weight reduction during the experimental period. T4, BT and combination improved body weight from the initial value. Rats treated with combination exhibited less percentage of loss of body weight compared to T4 and BT alone thus the combination improved general health of rats by improving the body weight. DPN is associated with neuropathic pain which is most common in DPN, thus we evaluated the nociception in diabetic rats. Nociception was evaluated by thermal, cold hyperalgesia and was well evident in diabetic rats, which is in accordance with several other reports [39,37]. In the present study a significant reduction in nociception with T4, BT and combination treatment for five weeks was observed. The combination of T4, and BT exhibited synergistic effect on reducing nociception. The effectiveness of T4, BT and combination in neuropathic pain is further assessed by measurement of grip strength and muscle incoordination by grip strength meter and rotarod apparatus. Rotarod test was performed to examine the motor incoordination [40,38]. The Rotarod experiment demonstrated the impairment of the motor function and coordination in the diabetic rats. Diabetic rats showed shorter fall off time from the rotating rod when compared to control, suggesting impairment in their ability to integrate sensory inputs with appropriate motor commands to balance their posture. The T4, BT and combination treated diabetic rats increased the fall off time from the rotating rod compared to STZ-induced diabetic rats. Our results showed that T4, BT and combination normalize the motor function and coordination thus helps to maintain their posture during movement on the rod. The severity of diabetic neuropathy has been associated with decreased muscle strength in both type 1 and type 2 diabetes [41,39]. In our study we observed significant improvement in motor behavior particularly grip strength in addition to motor incordination after treatment with T4, BT and combination. The combination of T4, and BT thus exhibited synergistic effect on muscle incordination and gripstrength Marked increase inpercentage of Glycosylated haemoglobin (GHb) has been reported in previous studies in diabetic rats [42,40].
The levels of GHb is the marker of state of diabetes over a period of 90 days. Similar observations were found in diabetic control rats. In our study T4, BT and combination treated diabetic rats showed decreased HbA1levles. The decrease levels of HbA1 in T4 treated ratscould be due to decreasing elevated glucose by promoting cell differentiation into insulin-producing β-cells, upregulation of insulin, glucose transporter protein-2 transcripts, and insulin release [19], thus less glucose available for glycation with hemoglobin. The inhibition activity of T4 on glycation of proteins In Vitro was also measured in our study. T4 inhibited AGE formation In Vitro could be the contributing factor in inhibition of GHb in diabetic rats. Similar trend was observed in BT and combination treated rats. BT is a transketolase (TK) activator [43,41]. BT was shown to prevent experimental diabetic retinopathy and In Vitro hyperglycemia-induced endothelial dysfunction. The effects of benfotiamine on in vivo endothelial function remained unknown. BT has shown to inhibit hexosamine pathway, advanced glycation end product (AGE) formation pathway and the diacylglycerol (DAG) protein kinase C (PKC) pathways. BT was significantly decreased levels of HbA1 as discussed earlier could be due to inhibition of AGE formation as it was evidence by inhibition of In Vitro AGE formation in our study. The protective role of BT also probably due to its activity as co enzyme in various biological pathways [44,42]. The combination of BT and T4 has also shown synergistic effect in decreasing GHb.
A number of reports indicate that DPN is a hypoxic neuropathy. Decreased nerve blood flow may lead to decreased nerve conduction velocity (NCV) due to lower Na+-K+-exchanging ATPase activity [4]. Reactive oxygen species (ROS) such as superoxides and hydroxyl radicals cause vascular endothelial damage and reduced nitric oxide mediated vasodilatation. Studies have also showed evidence that superoxides and proximitized impairs endothelium dependent vascular relaxation of epineural arterioles of the sciatic nerve in diabetic rats [45,43]. In addition to vascular mechanisms nonvascular mechanisms like impairment of neurotrophic support have also been reported to cause nerve conduction deficits in DPN [46,44]. Enhancement of neurotrophic factors by prosaposinderived peptide was reported to preserve nerve conduction [47,45].The deficit in nerve conduction velocity was completely prevented by T4 treatment could be due to increased Na+-K+- exchanging ATPase activity, providing neurotrophic support and improving micro vascular circulation [48,46] further, T4 improved the endogenous antioxidants and decreased LPO in sciatic nerve homogenate. BT, combination treated rats were also exhibited augmented NCV could be due to the ability of BT to inhibit AGE formation, improved endogenous sciatic nerve antioxidant thus inhibiting AGE, free radicals induced nerve damage in our study. Thus these two vascular and nonvascular effects of BT and T4 would be the contributing factors for the synergistic activity in combination treated rats Morphological study of siatic nerve of normal rats showed closely packed nerve fibers normal endoneuria matrix separating the nerve fibers (Figure 14A), admixture of large and small diameter myelinated fibers and the thickness of the myelin sheath is proportionate the width of the axonal diameter (Figure 14 B). Conversly, diabetic rats displayed the histological damages like reduced nerve fiber density in the endoneurium, (loss of more of small myelinated fibers while large diameter fibers are better preserved), (endoneurial (Figure 15A), vascular thickening (diabetic microangiopathy) (Figure 15 B), However, myelin sheath was unaffected (Figure 14 B) by streptozotocin in DPN [49,47]. The altered sodium cell gradient due to impairment of Na+/K+ ATPase activity leading to altered membrane environment which in turn causes histological damages, and decrease myelin protein expression.
T4, BT and combination treated rats sections showed absence of diabetic vascular changes, no vascular thickening to mild vascular thickening (Figure 15B), normal density of fibers with preservation of small and large diameter fibers, presence of regenerating nerve clusters (Figures 16-18 ).Treatment with T4, BT and combination for five weeks almost completely prevented the histological damages induced by diabetes. T4, BT could probably prevent the histological damages induced by diabetes due to prevention of hyperglycemia induced vascular and non-vascular mechanisms.
Conclusion
Treatment with T4, BT, and combination effectively prevented many of the behavioural, electrophysiological and histological manifestations of diabetes induced peripheral neuropathy by decreasing thermal and cold hyperalgesia, improving motor incoordination, grip strength, NCV, fiber density.
Highlights of the Study
a) Diabetic control rats displayed behavioral, biochemical electrophysiological and histological deficits; however, myelin sheath was unaffected.
b) T4, BT and combination of both exhibited beneficial effects in diabetes induced peripheral neuropathy in rats.
c) T4, BT and combination also inhibited In Vitro AGE formation, however IC 50 values of thyroxine was found to be high compared to BT, standard.
d) T4 was found less effective compare to BT in reducing GHb in diabetic rats.
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