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Biomedical subjects

O Browne

Publications and source records attributed to O Browne.

6 recordsLinked to original sources
PubMed1979

Lymphocyte response after surgery in the neonate.

Fourteen neonates born with congenital malformations were investigated for lymphocyte function before and after surgery. Total leucocyte and absolute lymphocyte counts were unaltered after surgery. The mean percentage of T-lymphocytes observed either pre- or postoperatively was considerably lower than that reported in older children and adults. While there was an increase in the percentage of B-lymphocytes after operation in the infants, the absolute number of B-cells remained unchanges. The preoperative transformation response of lymphocytes to PHA (mean 12.9 +/- 5.4 X 10(3) counts/min) was little different from the postoperative values (mean 12.4 +/- 4.4 X 10(3) counts/min). These results suggest that the neonate is immunologically different from older children and adults in its response to anaesthesia and surgery.

Anesthesia, Inhalation↗
PubMed1979

Immunological studies in neonates with spina bifida.

Fifteen neonates with spina bifida were investigated prior to surgery for T and B lymphocytes subpopulations and mitogen responsiveness to PHA. Results were compared to similar studies in 30 normal healthy neonates. The mean percentage of T-lymphocyes in spina bifida patients was 44.6% compared to 48.9% in normal neonates. A normal dose response to PHA was obtained in all patients. These results suggest no impairment of lymphocyte function in neonates born with spina bifida.

B-Lymphocytes↗
PubMed1975

The enhancing influence of proteolysis on E rosette forming lymphocytes (T cells) in vivo and in vitro.

The T lymphocytes populations of 22 young healthy adults, 21 healthy middle aged and older blood donors, 35 non-pregnant women of child bearing age and 14 patients with advanced malignant disease were assessed and compared. It was found that the mean T cell counts in the middle aged and older controls were significantly lower than in the healthy young adults and were further reduced in the patients with malignant disease. The addition of the proteolytic agent brinase (protease 1 obtained from Aspergillus oryzae) to the rosetting test increased the T cell counts signficantly in all groups. This was mot marked in the older age groups and the patients with malignant disease. The proteolytic agent is shown to exert its effect on the lymphocytes in the test. Slow intravenous infusion of either brinase or streptokinase into patients with malignant disease is shown to result in increased T lymphocyte counts pari passu with a restoration of skin allergy. The significance of these findings and possible mode of action of the proteolytic agents in increasing T cell activity are discussed.

Adolescent↗