Browsing by Author "Sunita Rai"

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A cute megakaryoblastic leukaemia: A clinico-haematological profile of five cases
(2004) Jyoti Shukla; Sunita Rai; V.P. Singh
Herein we are presenting the clinical, morphological and cytochemical characteristics of five cases of acute megakaryoblastic leukaemia (AML-M 7) seen by us over a period of five years (Jan 1996 - Dec 2000). Morphological assessment revealed marked polymorphism of blast cells and platelets both in the peripheral blood and bone marrow smears in all cases. Size of the blast cells ranged from very small to very large multinucleated cells, with variable chromatin pattern and number of nucleoli. More differentiated megakaryocytic cells showing cytoplasmic blebs, protrusions and platelet budding with bizarre platelet morphology were characteristic features suggesting the diagnosis. Cytochemical stains like myeloperoxidase, sudan black and PAS were positive in 5 - 15% of blast cell. Coagulation studies revealed a normal coagulation profile, whereas platelet studies showed marked impairment in aggregation of platelets with ADP and adrenalin with a normal PF-3 availability.
Clinicopathological study of renal amyloidosis
(2006) Usha; Rana Gopal Singh; Jai Parkash; Ruchi Kapoor; Sunita Rai; D.K. Sinha
Study included 13 cases of renal amyloidosis. Oedema, feet and face was the commonest manifestation (100%), two patients (18.18%) also presented with loose motions, ascites and pain in abdomen and one patient had ankylosing spondylitis and cervical spondylitis. On clinical grounds only one case was diagnosed as primary amyloidosis of light chain type, who presented initially with cervical lymphadenopathy and 4 years later with nephrotic syndrome. About 72.72% cases had some chronic disease in the terms of tuberculosis, ankylosing spondylitis, chronic ulcerative colitis, lepromatous leprosy, rheumatoid arthritis and one patient had carcinoma caecum. Congo red stain was positive in both, light chain deposit disease (LCDD) and amyloidosis but polarizing microscope showed mixed birefringence (red, green, yellow) only in amyloidosis. In AFOG and PAS stain, amyloid appeared negative, only peripheral portion revealed blue and pink staining and central area appeared as cutout spaces. Congo red and methyl violet stains and potassium permanganate treatment was not helpful in distinguishing AL amyloidosis from secondary amyloidosis. Hence immunohistochemistry and myeloma profile is a must. It might be possible that in light chain amyloidosis, treatment with methotrexate and prednisolone may improve survival.
Evaluation of antioxidant and neuroprotective effect of Ocimum sanctum on transient cerebral ischemia and long-term cerebral hypoperfusion
(2004) S.U. Yanpallewar; Sunita Rai; Mohan Kumar; S.B. Acharya
Free radicals are implicated in causation of cerebral reperfusion injury and chronic cerebral hypoperfusion in rats is associated with functional and histopathological disturbances. Ocimum sanctum (OS), a plant widely used in Ayurveda, has been shown to possess anti-inflammatory, antioxidant and cognition-enhancing properties. In the present study, we investigated the effect of methanolic extract of OS leaves in cerebral reperfusion injury as well as long-term hypoperfusion. Occlusion of bilateral common carotid arteries (BCCA) for 30 min followed by 45 min reperfusion caused increase in lipid peroxidation and up-regulation of superoxide dismutase (SOD) activity accompanied by fall in tissue total sulfhydryl groups (TSH) in rat forebrains. Ascorbic acid levels were unchanged, however. OS pretreatment (200 mg/kg/day for 7 days) prevented this reperfusion-induced rise in lipid peroxidation and SOD activity. OS pretreatment also stabilized the levels of TSH during reperfusion. Long-term cerebral hypoperfusion (a model of cerebrovascular insufficiency and dementia) induced by permanent occlusion of BCCA for 15 days demonstrated altered exploratory behavior in open-field testing and memory deficits as tested by Morris' water maze. Histopathological examination of hypoperfused animals revealed reactive changes, like cellular edema, gliosis and perivascular inflammatory infiltrate. OS treatment (200 mg/kg/day for 15 days) significantly prevented these hypoperfusion-induced functional and structural disturbances. The results suggest that OS may be useful in treatment of cerebral reperfusion injury and cerebrovascular insufficiency states. © 2004 Elsevier Inc. All rights reserved.
Neuroprotective effect of Azadirachta indica on cerebral post-ischemic reperfusion and hypoperfusion in rats
(2005) Sudhirkumar Yanpallewar; Sunita Rai; Mohan Kumar; Satish Chauhan; S.B. Acharya
We assessed the effect of Azadirachta indica (A. indica), a plant that has been reported to possess antioxidant, anti-inflammatory and anxiolytic properties, on cerebral reperfusion injury and long term cerebral hypoperfusion. When blood flow to brain region that has undergone critical period of ischemia is re-established, additional injury is to be expected from the reperfusion. In the present study, bilateral common carotid artery (BCCA) occlusion for 30 min followed by 45 min reperfusion resulted in increase in lipid peroxidation, superoxide dismutase (SOD) activity and fall in total tissue sulfhydryl (T-SH) groups. A. indica pretreatment (500 mg/kg/day x 7 days) attenuated the reperfusion induced enhanced lipid peroxidation, SOD activity and prevented fall in T-SH groups. Moreover, A.indica per se increased brain ascorbic acid level, which was unchanged during reperfusion insult. Long-term cerebral hypoperfusion induced by permanent BCCA occlusion has been reported to cause behavioral and histopathological abnormalities. In the present study, as tested by open field paradigm and Morris' water maze, a propensity towards anxiety and disturbances of learning/memory were observed in animals subjected to hypoperfusion for 2 weeks. A. indica (500 mg/kg/day x 15 days) significantly reduced these hypoperfusion induced functional disturbances. Reactive changes in brain histology like gliosis, perivascular lymphocytic infiltration, recruitment of macrophages and cellular edema following long term hypoperfusion were also attenuated effectively by A. indica. We conclude that our study provides an experimental evidence for possible neuroprotective potentiality of A. indica. © 2004 Elsevier Inc. All rights reserved.
Nimodipine attenuates biochemical, behavioral and histopathological alterations induced by acute transient and long-term bilateral common carotid occlusion in rats
(Academic Press, 2004) S.U. Yanpallewar; Debashish Hota; Sunita Rai; Mohan Kumar; S.B. Acharya
Restoration of blood flow to an ischemic brain region is associated with generation of reactive oxygen species with consequent reperfusion injury. Chronic cerebral hypoperfusion induced by permanent occlusion of bilateral common carotid arteries in rats is associated with behavioral and histopathological alterations. Nimodipine, a dihydropyridine calcium channel antagonist, has potent vasodilatory effect on cerebral vessels and increases cerebral blood flow. We analyzed whether nimodipine reduces injury caused by transient forebrain ischemia and long-term cerebral hypoperfusion. Bilateral common carotid occlusion for 30min followed by 45min reperfusion resulted in a two-fold increase in lipid peroxidation and superoxide dismutase activity. Nimodipine pretreatment (4mg/kg, i.p.) brought down these levels by 30 and 23%, respectively. Long-term cerebral hypoperfusion in rats caused a propensity towards anxiety and listlessness (open field paradigm) accompanied by deficits of learning and memory (Morris' water maze testing). Additionally, histopathological observation in hypoperfused brains revealed reactive changes in the form of perivascular inflammation, gliosis and astrocytosis. Nimodipine treatment significantly alleviated these changes in behavioral and histopathological parameters. Our data confirm the protective role of nimodipine in ischemia reperfusion injury. Moreover, it suggests the beneficial role of nimodipine in cerebrovascular insufficiency states and dementia. © 2003 Elsevier Ltd. All rights reserved.