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Biomedical subjects

P Arora

Publications and source records attributed to P Arora.

68 records · Page 4Linked to original sources
PubMed1979

Insect sex chromosomes. IV DNA replication in the chromosomes of Gryllotalpa fossor.

In Gryllotalpa the cell cycle duration in the hepatic caecae in vivo is about 12.5 h and of various phases are, G2 + P about 10 h, S about 2.5--3.5 h, and G1 appears negligible or absent. These estimates of the cell cycle are the only ones available in Gryllotalpidae. In the female Gryllotalpa, as in mammals, there is asynchronous DNA replication between the two euchromatic arms of the two X chromosomes. The other arm is constitutively heterochromatized and as expected is late replicating. Thus, a regulatory mechanism for dosage compensation by X chromosome inactivation appears to be operating in Gryllotalpa. This we believe, is the first cytogenetic demonstration of such a mechanism outside mammals.

Animals↗
PubMedDate not supplied

Risk factors for duodenal ulcer in north India.

OBJECTIVES: The present study was designed to evalutate the association of various risk factors such as smoking, alcohol, NSAIDs, inadequate dietary intake of fibres and consumption of spicy foods with chronic duodenal ulcer using a case-control design and to establish the association of Helicobacter pylori and duodenal ulcer using different diagnostic techniques in Indian subjects. MATERIALS: A total of 16 consecutive patients with endoscopically proven duodenal ulcer (DU) constituted the test group while 160 subjects with non-ulcer dyspepsia (NUD) were recruited as controls. METHODS: All subjects were interviewed based on a standard questionnaire and underwent an upper gastrointestinal endsocopy wherein multiple biopsies were taken for rapid urease test (RUT), histology and culture for detection of H. pylori. The serum samples of all the subjects were tested for the presence of antibodies against H. pylori using ELISA. RESULTS: There were significantly greater number of smokers (80%) and alcoholics (58%) in the male population of DU group as compared to the controls (49% smokers & 15% alcoholics). Similar trend was seen in relation to history of chronic exposure to NSAIDs (29% in DU & 11% in NUD) and inadequate intake of fibre in diet (66% and 39% respectively). The overall prevalence of H. pylori was 82.5% in DU and 50.6% in NUD [p < 0.001]. CONCLUSIONS: In North Indian subjects, alcohol consumption, smoking, inadequate intake of fibre in diet and use of NSAIDs are the risk factors associated with doudenal ulcer disease. Further, infection with H. pylori is strongly associated with DU in the North Indian population.

Adult↗
PubMedDate not supplied

Acute renal failure in an intensive care unit in India--prognostic factors and outcome.

We prospectively analyzed 70 consecutive patients who developed acute renal failure (ARF) in the intensive care unit (ICU) during a six year period to define prognostic factors and outcome. Age, sex, preexisting chronic diseases, systemic infections, number of organs failing during the disease course, need and mode of renal replacement therapy (RRT), and length of stay in ICU were recorded. Analysis of factors in survivors (n=7, Gp A) and nonsurvivors (n=63, Gp B) was done by univariate and multivariate analysis. The mean age of patients was 28.6 years. Forty nine (70%) patients developed ARF following surgery, whereas 21 (30%) developed ARF in a medical setting. Cardiovascular surgery (39) and pancreatic surgery (7) were important causes in the surgical group, whereas in the medical group acute pancreatitis (11) was the main causative factor. One patient had ARF only, while in the rest, other organs were also involved. In more than 80% of these patients, organ failure and sepsis were present before the onset of ARF. Fifty two (74.3%) patients required dialytic support. The overall mortality was 90%. Number of organs failing, (1.5 +/-9 in Gp A vs 3.6 +/- 8 in Gp B), presence of systemic infection (1 in Gp A vs 55 in Gp B), prolonged stay in ICU (3.7 +/- 1.1 days in Gp A vs 8.0 +/- 5.4 in Gp B) and need for RRT (2 in Gp A vs 50 in Gp B) correlated with the mortality. Using multiple logistic regression analysis, only multiple organ failure (3 or more) correlated with the mortality. We conclude that multiple organ failure is a poor prognostic factor in patients with ARF in the setting of the ICU.

Acute Kidney Injury↗
PubMedDate not supplied

Benzathine penicillin induced immune haemolytic anaemia.

Penicillin-induced immune haemolytic anaemia is very rare. A ten year-old-female with rheumatic mitral stenosis on benzathine penicillin prophylaxis presented with features of haemolytic anaemia and investigations supported the diagnosis of immune haemolytic anaemia. Patient responded to discontinuation of the drug and therapy with oral prednisolone. This is first such case reported from India.

Anemia, Hemolytic↗
PubMedDate not supplied

Ovarian dysgenesis with balanced autosomal translocation.

Autosomal translocations are rare in the patients with ovarian dysgenesis. An 18-year-old female who presented with primary amenorrhoea had hypergonadotropic hypogonadism and streak ovaries with hypoplastic uterus. Karyotype analysis revealed a balanced autosomal translocation involving chromosomes 1 and 11. The probable role of autosomal translocations in ovarian dysgenesis has been discussed.

Adolescent↗