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Biomedical subjects

B Phillips

Publications and source records attributed to B Phillips.

At least 145 records · Page 8Linked to original sources
PubMed1985

Effect of smoking on human natural killer cell activity.

Natural killer (NK) cells play a central role in immune surveillance against tumors and viral infections. NK activity is depressed in patients who have a wide range of carcinomas, including carcinomas of the lung. Peripheral blood NK activity was measured in 22 nonsmokers, 15 light/moderate smokers, 12 heavy smokers, and 19 patients with carcinoma of the lung. Patients with carcinoma of the lung had marked depression in NK activity compared with nonsmokers. Light/moderate smokers had NK activity comparable to that of nonsmokers, whereas heavy smokers had marked depression in NK activity that was comparable to that of patients with carcinoma of the lung. These results suggest that smoking-induced alterations in NK activity may have a role in the pathogenesis of smoking-associated carcinoma of the lung.

Cells, Cultured↗
PubMed1985

Sleep, sleep loss, and breathing.

Sleep and sleep loss have remarkable effects on breathing. Although sleep causes ventilatory disturbances of greater severity and variety than does sleep deprivation, the effects of sleep and sleep loss on respiration are similar. For example, both impair ventilatory drive and arousal responses to a variety of stimuli. Although the mechanism of impaired ventilation after sleep loss is not entirely understood, there is evidence to suggest that both respiratory muscle fatigue and central nervous system depression play a role. Patients who suffer from both disturbed sleep and lung disease are particularly vulnerable to the adverse effects of sleep disruption on breathing. Since sleep restoration returns many respiratory parameters to normal in sleep-deprived individuals, perhaps we should include rest in our treatment of certain patients with respiratory disease.

Humans↗
PubMed1984

DNA damage in isolated hamster and rat pancreas cells by pancreatic carcinogens.

N-Nitrosobis(2-oxopropyl)amine (BOP), N-nitrosobis(2-hydroxypropyl)-amine (BHP) and N-nitroso(2-hydroxypropyl-2-oxopropyl)amine (HPOP) are pancreatic carcinogens in the Syrian golden hamster (SGH) but do not cause pancreatic tumors in rats. In this study, the ability of these three compounds to induce DNA damage in isolated pancreas cells from both species was determined by alkaline elution analysis. BOP was highly potent in SGH cells, causing DNA damage at concentrations as low as 0.5 micrograms/ml, and HPOP, although less potent than BOP, also caused considerable damage. Isolated SGH pancreas cells are thus able to metabolize BOP and HPOP to DNA-damaging species. Of the three compounds tested, only HPOP at higher doses (25-100 micrograms/ml) induced DNA damage in isolated rat pancreas cells. BHP did not damage rat or SGH pancreas cell DNA at concentrations up to 100 micrograms/ml, apparently due to lack of uptake of this compound by the cells. The observed insensitivity to DNA damage in rat cells is consistent with the resistance of the rat pancreas to carcinogenesis by these three compounds. The sensitivity of SGH pancreas cells to BOP- and HPOP-induced DNA damage correlates with the high carcinogenicity of these compounds for the SGH pancreas.

Animals↗
PubMed1981

Pelvic exenteration for vulvovaginal carcinoma.

Between 1964 and 1978, 16 pelvic exenterations were performed for advanced and recurrent vulvovaginal carcinoma. Eight patients had Stage III carcinoma and four had recurrent vulvar carcinoma. Ten patients had involvement of the anus/sphincter, and two had involvement of the proximal half of the urethra. There were four patients with vaginal carcinoma. Two patients with recurrent vaginal carcinoma had bladder/urethral involvement; one patient each with primary vaginal carcinoma had rectovaginal and vesicovaginal septal disease. Seven patients are alive and free of disease--six for more than 5 years and one for 4 years and 4 months. Three patients died, free of disease, one each of cerebrovascular accident, traumatic subdural hematoma, and pulmonary embolus. One patient died on the ninth postoperative day of aspiration pneumonitis. The absolute 5-year survival rate is 54%.

Adult↗
PubMed1980

Pharmacological study of broperamole, a chemical novel antiinflammatory compound.

N-3[5'-(3"-Bromophenyl)-2'H-tetrazole]propionyl piperidine (broperamole) was shown to elicit potent antiinflammatory activity following systemic administration to rats in acute and subchronic studies. The compound demonstrated systemic antiinflammatory activity 5-6 times that of phenylbutazone. Toical antiinflammatory activity was also demonstrated which was less than that of hydrocortisone but still should have clinical utility. Antipyretic activity, without effect on normal body temperature, was observed. Analgesic activity was not evidenced. Only at very high doses was gastric irritation noted; therefore, at anticipated human dose level, gastrointestinal toxicity in man should not occur.

Administration, Topical↗
PubMed1977

Oral treatment of subacute bacterial endocarditis in children.

Fourteen episodes of subacute bacterial endocarditis in 11 children were successfully treated with antibiotics, which in 13 cases were given largely by mouth. It is suggested that oral treatment of bacterial endocarditis should be considered for children who are only moderately but not severely ill, and who have sensitive organisms.

Administration, Oral↗