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Biomedical subjects

J E Baptist

Publications and source records attributed to J E Baptist.

7 recordsLinked to original sources

Aspirin allergy.

This paper represents a 17-year prospective study of the clinical characteristics of patients with a history of having had allergic reactions to aspirin. The following points are especially important. (1) The most common manifestation is urticarica/angioedema; the second most common, asthma. (2) Women of child-bearing age are especially prone to develop aspirin sensitivity, otherwise the age of onset is approximately equal in the two sexes, varying from one year to 60 years. (3) Although an immunologic basis of aspirin sensitivity has not been demonstrated, 90% of its victims are also sensitive to inhalants (76%), foods (74%) or drugs (43%). (4) The authors could not confirm the widely held view that aspirin cross-reacts with tartrazine. (5) They were also unable to confirm another widely held view that asthmatic patients who are sensitive to aspirin have a strong tendency to develop nasal polyps. (6) The prognosis of asthma in patients sensitive to aspirin does not differ from that of patients who are not. These findings underline the importance of giving every aspirin-sensitive patient the benefit of a complete allergic work-up.

Adolescent↗

Physiological modifications in the production and repair of methyl methane sulfonate-induced breaks in the deoxyribonucleic acid of Escherichia coli K-12.

The medium in which Rec(+) strains of Escherichia coli K-12 are grown affected their sensitivity to treatment with methyl methane sulfonate (MMS). Rec(+) cells grown to the stationary phase in glucose-enriched nutrient broth (GNB) were more resistant to MMS than cells grown in nutrient broth (NB). The repair of MMS-induced breaks (or alkali-labile bonds) in the deoxyribonucleic acid (DNA) from E. coli K-12 strains AB1157, AB1886 uvrA6, and SR111 recA13 recB21 grown in GNB and NB media was examined by means of alkaline sucrose gradient centrifugation. It appeared that essentially all of the repair of breaks that occurred, as evidenced by an increase in "molecular weight," took place within 10 min after treatment with MMS under our conditions. Cell survival was highest in cells for which the size of the DNA after the post-treatment incubation was the largest. The largest DNA after post-treatment incubation was found in Rec(+) cells grown in GNB medium. The results suggest that these cells may have an enhanced capacity for repairing breaks in DNA.

Alkanesulfonates↗