Perinatal Influences on in Vitro B Lymphocyte Differentiation in Human Neonates
作者:
WILLIAM PITTARD,
KATHLEEN MILLER,
RICARDO SORENSEN,
期刊:
Pediatric Research
(OVID Available online 1985)
卷期:
Volume 19,
issue 7
页码: 655-658
ISSN:0031-3998
年代: 1985
出版商: OVID
数据来源: OVID
摘要:
In vitrodifferentiation of B lymphocytes present in cord blood mononuclear cell preparations into immunoglobulin secreting cells was studied in 126 neonates with gestational ages (GA) ranging from 20 to 44 wk. Eight infants had a GA less than 27.9 wk, 24 had GA 28–32.9 wk, 30 had GA 33–37.9 wk, 51 had GA 38–41.9 wk, and 13 had GA above 42 wk. B cell differentiation in response to pokeweed mitogen plus hydrocortisone was assessed using a plaque forming cell assay. All neonates had a measurable plaque-forming cell response in this assay. An increased plaque-forming cell response was observed in some neonates in all gestational age groups. The magnitude ofin vitroneonatal B cell differentiation underwent a continuous and significant (p< 0.002) reduction as gestational age increased. The influence of intrauterine growth retardation onin vitroB lymphocyte differentiation was studied and compared to gestational age-matched controls with a normal intrauterine growth. Intrauterine growth retardation was not associated with changes in B cell responsiveness. An analysis of perinatal factors revealed that cesarean section, and low 1-min Apgar scores were factors that predisposed cord blood cells to be triggeredin vitroto produce increased numbers of plaque-forming cells.
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