NEUROREGENERATIVE EFFECTS OF D-α-TOCOPHEROL ON THE CRUSHED SCIATIC NERVE OF DIABETIC RATS

ABSTRACTObjective: This present study is designed to explore the neuroregenerative effects of d-α-tocopherol on peripheral nerve in both healthy and diabeticrats.Methods: 24 albino rats were divided into four groups; healthy control, diabetic control, healthy treated, and diabetic treated. Diabetes was inducedby single subcutaneous injection of alloxan (100 mg/kg). Treated groups were administered d-α-tocopherol orally, daily (200 mg/kg) for 3 weeks.Through a mid-thigh incision, sciatic nerve was crushed with Kocher's forceps, and skin wound was closed with absorbable suture. Sciatic functionaland static indices were used to assess the functional recovery in conjunction with histological, histomorphological, and biochemical analyses at theend of 3 weeks.Results: It was noticed that d-α-tocopherol supplementation accelerates functional recovery, enhances the antioxidant levels, and promotes theregeneration and extracellular matrix reorganization of peripheral nerves.Conclusion: It is concluded that the d-α-tocopherol appears to be an optimistic option in the management of peripheral nerve crush injury in bothhealthy and diabetics.Keywords: Antioxidant, d-α-tocopherol, Diabetes, Rats, Regeneration, Sciatic nerve

Effect of N′-nitrosodimethylamine on red blood cell rheology and proteomic profiles of brain in male albino rats

We investigated the effects of N'-nitrosodimethylamine (NDMA) induced toxicity on red blood cell rheology in male rats and identified bands in proteomic profiles of brain which can be used as novel markers. Polyacrylamide gel electrophoresis (PAGE) profiles exhibited constitutive as well as induced expression of the polypeptides. Remarkably, the molecular weight range of the polypeptides (8–150 kDa) corresponded to that of the family of heat shock proteins. Our results revealed significant changes in blood parameters and showed the presence of acanthocytes, tear drop cells, spicules and cobot rings in the treated categories. Lactate dehydrogenase and esterase zymograms displayed a shift to anaerobic metabolism generating hypoxia-like conditions. This study strongly suggests that NDMA treatment causes acute toxicity leading to cell membrane destruction and alters protein profiles in rats. It is therefore recommended that caution should be exercised in using NDMA to avoid risks, and if at all necessary strategies should be designed to combat such conditions

Rhinosporidiosis: Intraoperative Cytological Diagnosis in an Unsuspected Lesion

Rhinosporidiosis is a disease endemic to South India, Sri Lanka and some areas of the African continent. The nasal lesions can sometimes be confused with nasopharyngeal malignancy. We report here a clinically unsuspected case of rhinosporidiosis, diagnosed correctly by intraoperative FNAC, and later confirmed by histopathological examination

Th erapeutic potential of d-Th erapeutic potential of d-δ-tocotrienol rich fraction -tocotrienol rich fraction on excisional skin wounds in diabetic rats

Introduction: Long-standing hyperglycemia in addition to many of its associated complications also hampers normal wound healing which may be further aggravated in the presence of infection and oxidative stress. Therefore, antioxidant supplementation appears to be strategically relevant for wound healing. This study is designed to explore the therapeutic potential of d-δ-tocotrienol rich fraction (d-δ-TRF) on skin wound healing in both healthy and diabetic rats. Materials and Methods: Diabetes was induced through single subcutaneous injection of alloxan at the dose of 100 mg/kg at hip region. 24 albino rats were divided into four groups; healthy control, diabetic control, healthy treated and diabetic treated. d-δ-TRF was administered to treated groups (200 mg/kg), orally, daily for 3 weeks. Full thickness excisional skin wounds were. Wound area was studied by assessing the morphological, histomorphological and histological features at weekly intervals and biochemical analyses were performed at the end of 3rd week. Results: The findings of present study revealed that d-δ-TRF accelerated the skin wound healing by means of early regeneration of both epidermal and dermal components; enhancement of serum protein synthesis, improvement of antioxidant status, maintenance of glycemic condition and controlling serum creatinine levels in diabetic rats. Conclusion: It is concluded that d-δ-TRF has significant therapeutic potency on the healing of skin wounds in both healthy and diabetics

Eff ect of vitamin E isoforms on the primary intention Eff ect of vitamin E isoforms on the primary intention skin wound healing of diabetic rats

Introduction: Impaired wound healing events is a common complication in diabetes. One of the effective nutritional antioxidant on skin wound healing is vitamin E which contains saturated tocopherol and unsaturated tocotrienol forms. This present study is designed to explore the effect of different vitamin E isoforms on stitched skin wound in both healthy and diabetic rats. Materials and Methods: Forty eight albino rats were divided into eight groups; healthy control, diabetic control, healthy treated (d-α-tocopherol, d-δ-TRF and co-administrated) and diabetic treated (d-αtocopherol, d-δ-TRF and co-administrated). Diabetes was induced through single subcutaneous injection of alloxan at the dose of 100 mg/kg. Treated groups were administered d-a-tocopherol (200 mg/kg), d-δ-TRF (200 mg/kg) and co-administration (100 mg/kg of these two compounds each) orally and daily for three weeks. A horizontal skin incision was made on right mid-thigh region at 2.95 ± 0.17cm in length and wound was closed with an absorbable suture. Results: Histopathological and histomorphological results at the end of 3rd week revealed that the d-δ-TRF treated groups promote the regeneration and reorganization of epidermal and dermal components in healing of primary intention more effectively than the d-α-tocopherol and co-administrated groups. Conclusion: It is concluded that among different vitamin E isoforms the d-δ-TRF appears to be a more effective nutritional antioxidant on skin wound healing in both healthy and diabetics

Malignant peripheral nerve sheath tumor presenting as pathological fracture of femur in neurofibromatosis patient

Malignant peripheral nerve sheath tumors (MPNSTs) are rare soft tissue sarcomas that arise from a peripheral nerve or cells associated with the nerve sheath, such as Schwann cells, perineural cells, or fibroblasts. MPNSTs account for 5%–10% of all soft tissue sarcomas. Neurofibromas in Neurofibromatosis-1 (NF-1) may undergo malignant transformation in 2%–5% of patients. We are reporting a very rare case in NF-1 patient who, presented with pathological intertrochanteric fracture of femur and liver metastasis. X-ray from left hip joint shows lytic lesion which on histopathology turned out to be MPNST. S-100 was positive confirming its neural origin. Elbow lesion which was excised later, also showed similar features with S-100 positivity. Ultrasonography abdomen showed target lesions in liver. Fine-needle aspiration cytology from liver showed scattered malignant spindle cells. A final diagnosis of metastatic MPNST was made. Although malignant transformation in neurofibromas is extremely rare when it occurs, it is associated with NF-1 in 75% of patients. This case highlights the possibility of fracture femur as the presenting complains, in patients of NF with malignant transformation. The case is unique with regard to its presentation and rarity of metastatic sites

Bilateral sertoli-leydig cell tumor of the ovary: A rare case report

Sertoli leydig cell tumors also known as arrhenoblastoma, are a rare member of the sex cord-stromal tumor group of ovarian and testicular cancers, comprising less than 1% of all ovarian tumors, which occur in young adults and are almost always unilateral. We hereby report a case of a 17-year-old female presenting with a short history of irregular menses and an abdominal lump, which was histologically proven to be a bilateral sertoli leydig cell tumor of the ovary, an exceptionally rare entity in itself