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Biomedical subjects

A K Sharma

Publications and source records attributed to A K Sharma.

At least 343 records · Page 19Linked to original sources
PubMed1990

Hashimoto's thyroiditis--a clinical review.

Hashimoto's thyroiditis constituted 5.15% of total thyroid disorders examined from January 1983 to July 1987. Females were predominant sufferers. Average age of patients was 41.14 years. Functionally 10 patients were euthyroid, while hyperthyroidism was present in 4 cases. Its preoperative diagnosis was not possible in any of the case. All patients were subjected to surgery and postoperative thyroxine supplement.

Adult↗
PubMed1990

Sexually transmitted diseases in leprosy patients in north and northeastern India. A futile search for human immunodeficiency virus antibody.

Three-hundred-eighty-four leprosy patients were clinically examined for sexually transmitted diseases (STD) in north and northeastern India, revealing a high incidence (5.2%) of STD among them. Eighteen males, one female, and one eunuch were found to have chancroid ulcer, gonococcal urethritis, lymphogranuloma inguinale, and primary chancre. Of these patients, only 100, selected randomly, could be screened serologically for STD due to Treponema pallidum, herpes simplex (type 1 and 2), Entamoeba histolytica, hepatitis-associated virus, cytomegalovirus, Chlamydia trachomatis and human immunodeficiency virus (HIV); 100 control sera were included for comparison. In addition, sera from another 133 normal subjects and another 176 lepromatous patients were also screened for HIV antibody. Thus, a total of 233 normal sera and 276 leprosy sera were tested for HIV antibody. Although our leprosy patients have shown significantly high incidences of clinical STD and also high seropositivity against T. pallidum, herpes-simplex viruses types 1 and 2, hepatitis-associated virus, and cytomegalovirus, the search for antibody against HIV was negative. Our clinical and serological data suggest promiscuity in our patient population. The absence of HIV antibody in this high-risk population, however, seems to be an enigma.

Adult↗
PubMed1989

Intraperitoneal rupture of amoebic liver abscess.

A retrospective analysis of 23 cases of amoebic liver abscess with intraperitoneal rupture is presented. Group I consisted of 16 patients with clinical features of generalized peritonitis. Eight of these patients were treated surgically, and four died. Group II consisted of seven patients with features of localized peritonitis and all were treated conservatively. In all cases the diagnosis of liver abscess was established by liver scan or ultrasound examination; peritonitis was established either at operation or, in the conservatively managed group, by aspiration of pus from the peritoneal cavity. Amoebiasis was diagnosed by serology. Eight group I and all group II patients were managed conservatively by aspiration of the liver abscess, antibiotics and amoebicides. There were no deaths in this group. It is suggested that, if the diagnosis can be made early, conservative treatment offers the best chance of cure for patients of amoebic liver abscess with intraperitoneal rupture.

Adolescent↗
PubMed1989

Small intestinal morphology in experimental diabetic rats: a stereological study on the effects of an aldose reductase inhibitor (ponalrestat) given with or without conventional insulin therapy.

The gross and microscopical dimensions of small intestines from 12-week old streptozotocin-diabetic rats receiving no therapeutic intervention were compared with those from animals receiving insulin alone or in conjunction with the aldose reductase inhibitor, ponalrestat. Four regions along each intestine were analysed stereologically. Insulin had significant beneficial effects on body weight as well as on intestinal length, width, surface area and volume. In contrast, ponalrestat did not improve body weight deficits and was associated with crypt hypertrophy and a reduced villous surface/crypt volume ratio. There were interaction effects between insulin and ponalrestat for intestinal length and primary mucosal surface area. All groups displayed significant regional differences in surface area of primary mucosa and volume of muscularis externa. Only untreated diabetic rats failed to reveal regional variation in the surface area and volume of villi. Ratios of villous surface area/crypt volume varied from region-to-region in insulin-treated diabetic rats but not in other groups. The study fails to reveal any beneficial effect of aldose reductase inhibition on the changes in intestinal morphology seen in experimental diabetes.

Analysis of Variance↗
PubMed1989

Microangiopathy in human diabetic neuropathy: relationship between capillary abnormalities and the severity of neuropathy.

Clinical, electrophysiological and ultrastructural morphometric observations were made in 5 diabetic non-neuropathic patients, 5 diabetic patients with mild neuropathy and 11 diabetic patients with severe neuropathy. Capillary abnormalities were assessed in simultaneous nerve, muscle and skin biopsies and compared with results from 6 age-matched, non-diabetic control subjects. Nerve capillaries demonstrated markedly greater pathology than skin and muscle capillaries. Endoneurial capillary density was significantly reduced in severely neuropathic diabetic patients (p less than 0.01) when compared with control subjects. Capillary basement membrane (p less than 0.002), endothelial cell (p less than 0.003) and total diffusion barrier (endothelial cell, pericyte, basement membrane) (p less than 0.001) thickness were significantly increased, and oxygen diffusing capacity was significantly reduced (p less than 0.001) in the nerves of patients with severe diabetic neuropathy when compared to control subjects. Endothelial cell profile number and luminal perimeter were significantly increased in asymptomatic (p less than 0.01), (p less than 0.05) and severely neuropathic (p less than 0.001), (p less than 0.05) diabetic patients respectively. However, endothelial cell outer perimeter, a measure of capillary size, showed no significant increase in diabetic patients when compared with control subjects. An association was observed between neurophysiological and neuropathological measures of neuropathic severity. There was no significant correlation between the duration of diabetes and HbA1 levels with capillary pathology or with neuropathic severity. Very few abnormalities of muscle and skin correlated with neuropathic severity. However, all measures of nerve capillary pathology correlated significantly with neurophysiological and neuropathological measures of neuropathic severity.

Adult↗
PubMed1989

Maternal mortality inquiry in a rural community of north India.

Community inquiry on maternal mortality was conducted in a rural area of North India. Maternal deaths were identified by multiple informants and investigated by doctors. Amongst 257 deaths registered in women in the 15-44 year age group, 55(21.4%) were maternal deaths. Maternal mortality ratio was 230 per 100,000 live births. Major causes were antepartum and postpartum hemorrhage (18.2%), puerperal sepsis (16.4%), severe anemia (16.4%), abortion (9.1%) and obstructed labor (7.3%). This rapid, simple and low cost method is recommended for application in areas where vital registration system is unsatisfactory.

Adolescent↗
PubMed1989

Conformations of peptides containing Z-alpha,beta-dehydroleucine (delta ZLeu). A comparison of Boc-Pro-delta ZLeu-Gly-NHEt and Boc-Pro-delta ZPhe-Gly-NHEt.

Two tripeptides of the type Boc-Pro-delta ZX-Gly-NHEt (where X = Leu, Phe) have been synthesized and their solution conformations investigated by 270 MHz 1H n.m.r. and i.r. spectroscopy. These conformational studies indicated that delta ZLeu, similar to delta ZPhe, has a strong tendency to stabilize folded Type II beta-turn conformations when present at i + 2 position.

Leucine↗
PubMed1989

Hepatoprotective effects of Wedelia calendulacea.

The alcoholic extract of whole plant Wedelia calendulacea exhibited protective activity against carbon tetrachloride-induced liver injury in vivo. The extract also increased the bile flow in rats suggesting a stimulation of liver secretory capacity. The minimum lethal dose was greater than 200 mg/kg p.o. in mice.

Animals↗
PubMed1989

Randomized, double-blind, controlled trial of long-term diuretic therapy for bronchopulmonary dysplasia.

The effects of continuous therapy with hydrochlorothiazide and spironolactone on pulmonary function in 34 premature infants with severe bronchopulmonary dysplasia were assessed in a randomized double-blind controlled trial. Subjects were greater than or equal to 30 days old, were supported by mechanical ventilation in greater than or equal to 30% oxygen, and had radiographic evidence of bronchopulmonary dysplasia. The treatment group (n = 19) and the placebo group (n = 15) were similar in all respects except for distribution of gender. Anthropometrics, ventilatory measurements, and the results of pulmonary function tests were evaluated at study entry and at 1, 4, and 8 weeks into therapy. Poststudy chest radiographs were compared with those obtained before the study. The proportion of infants alive at discharge was significantly increased (84%) in the treatment group compared with the placebo group (47%) (p = 0.05). There were no statistically significant differences in total hospital days or in total ventilator days. Total respiratory system compliance at 4 weeks was higher in the treatment group (0.61 +/- 0.18) than in the placebo group (0.45 +/- 0.13) (p = 0.016). No difference in outcome was detected between male and female infants in the treatment group. These results suggest that long-term diuretic therapy improves outcome in infants with bronchopulmonary dysplasia.

Bronchopulmonary Dysplasia↗
PubMed1989

Induction of hepatic cytochrome P-450 and xenobiotic metabolizing enzymes in rats gavaged with an Alberta crude oil.

Changes in body weight gain and in biochemical parameters of blood and liver were assessed in Sprague-Dawley rats after multiple oral administration of three test doses of an Alberta crude oil (ACO). Rats treated with ACO (1.25-5 ml/kg) did not show statistically significant (p greater than .05) differences from control, corn-oil treated (5 ml/kg) rats, in body weight gains, liver weight, and blood biochemical indicators of liver (alanine aminotransferase, gamma glutamyltransferase), kidney (blood urea nitrogen, creatinine), and erythrocyte (adenosine 5'-triphosphate, 2,3-diphosphoglyceric acid, reduced glutathione) cytotoxicity. Treatment with ACO, however, caused statistically significant (p less than .05) and dose-related increases from control in (1) microsomal protein and cytochrome P-450 content, and NADPH-cytochrome c reductase, aryl hydrocarbon hydroxylase (AHH), and 7-ethoxycoumarin-O-deethylase (7-ECOD) activities, and (2) cytosolic glutathione transferase activity of liver. The induction of hepatic cytochrome P-450 and xenobiotic-metabolizing enzymes in microsomes of ACO-treated rats was probably associated with dose-related changes in isozymic forms of cytochrome P-450, as evidenced by (1) appearance of a 448-nm spectral peak in microsomes of ACO-treated rats and (2) differences in the inhibition pattern of AHH and 7-ECOD activities in microsomes of control and ACO-treated rats upon treatment with metyrapone and 7,8-benzoflavone.

7-Alkoxycoumarin O-Dealkylase↗
PubMed1989

Injury Severity Score (ISS) as a yardstick in assessing the severity and mortality of various abdomino-pelvic trauma hospitalized victims--a clinical vis-à-vis autopsy study.

A summary of 51 cases of vehicular accident showing abdomino-pelvic trauma, along with associated other regional injuries, were studied at the Department of Forensic Medicine at MAM College and Associated Hospitals in New Delhi during 1986. A detailed Injury Severity Score (ISS) was done in all the cases and the relationship of ISS during their clinical treatment phase and after death was studied, keeping in mind factors such as age, survival periods, etc.

Abdominal Injuries↗