Mir Misbahuddin

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In isolated guinea pig adrenal chromaffin cells, not only nicotine, but also muscarine stimulated catecholamine (CA) secretion, the stimulation by muscarine being the greater. The secretions of CA by muscarine and nicotine were both dependent on the presence of Ca2+ in the medium, but only the latter was associated with a rapid increase in 45Ca2+ uptake.(More)
This study was carried out to see whether corn extracts could reduce the accumulation of arsenic in different tissues of rat. Exposure to arsenic (700 microg/rat/day) orally for 15 days led to significant accumulation of arsenic and significant reduction in the concentration of reduced glutathione (GSH) in different tissues. While water, salt, ethanol and(More)
The effects of vasoactive intestinal polypeptide (VIP) on catecholamine (CA) secretion by isolated guinea pig adrenal medullary cells were studied. VIP (1 microM) alone induced only a slight secretion of CA, but it stimulated ACh-induced CA secretion. At concentrations of 0.01-1 microM, it stimulated muscarine-induced CA secretion, but not nicotine-induced(More)
The stimulatory effect of vasoactive intestinal polypeptide (VIP) on catecholamine (CA) secretion from isolated guinea pig adrenal chromaffin cell was studied. VIP (1-10 microM) induced dose-dependent CA secretion, which was slow and continued for at least 30 min. This VIP-induced CA secretion was dependent on the presence of Ca2+ in the medium, but no(More)
In isolated bovine adrenal medullary cells, vasoactive intestinal polypeptide (VIP) stimulated 14C-catecholamine synthesis from 14C-tyrosine, but not from 14C-DOPA. This stimulatory effect of VIP on 14C-catecholamine synthesis was not dependent upon extracellular Ca2+. VIP did not affect the intracellular cyclic AMP (cAMP) level. The stimulatory effect of(More)
Water hyacinth (Eichhornia crassipes) removes arsenic from arsenic-contaminated drinking water. This effect depends on several factors, such as the amount of water hyacinth, amount of arsenic present in the water, duration of exposure, and presence of sunlight and air. On the basis of the present study, the authors suggest that water hyacinth is useful for(More)
The change in cytoplasmic free calcium, [Ca2+]i in isolated bovine adrenal medullary cells during stimulation by acetylcholine (ACh) in Ca2+-free incubation medium was measured using the fluorescent Ca2+ indicator quin2. ACh (1-100 microM) caused an increase in [Ca2+]i by mobilization of Ca2+ from the intracellular pool. Nicotine (10 microM) did not(More)
Toxic concentration of arsenic (400 microg/kg body weight/day) was administered orally for 8 weeks to both iron-supplemented and iron-deficient rats. The results showed greater amount of arsenic in both the duodenum and liver of iron-deficient rats, compared to iron-supplemented ones. Duodenum containing high concentration of arsenic in iron-deficient rats(More)
To examine the effect of zinc in the removal of accumulated arsenic from different tissues (liver, kidneys, spleen and lungs), rats were initially allowed to drink high concentration (400 microg/kg/day) of arsenic for two months followed by a period of cessation (one month). Administration of zinc (2 mg/kg/day) during the third month in arsenic-treated and(More)