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Titolo:
NEUTROPHIL ADHESION MOLECULE EXPRESSION IS COMPARABLE IN PERINATAL RABBITS AND HUMANS
Autore:
RAMAMOORTHY C; KOVARIK WD; WINN RK; HARLAN JN; SHARAR SR;
Indirizzi:
CHILDRENS HOSP & MED CTR,DEPT ANESTHESIA & CRIT CARE,CH-05,4800 SAND POINT WAY NE SEATTLE WA 98105 UNIV WASHINGTON,SCH MED,DEPT ANESTHESIOL SEATTLE WA 98195 UNIV WASHINGTON,SCH MED,DEPT SURG SEATTLE WA 98195 UNIV WASHINGTON,SCH MED,DEPT MED SEATTLE WA 98195 OREGON HLTH SCI UNIV,DEPT ANESTHESIOL & PEDIAT PORTLAND OR 97201
Titolo Testata:
Anesthesiology
fascicolo: 2, volume: 86, anno: 1997,
pagine: 420 - 427
SICI:
0003-3022(1997)86:2<420:NAMEIC>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
L-SELECTIN; NEONATAL NEUTROPHILS; CHEMOTACTIC FACTORS; POLYMORPHONUCLEAR LEUKOCYTES; NEWBORN-INFANTS; MAC-1; LECTIN; GRANULOCYTES; EMIGRATION; DEFICIENCY;
Keywords:
HUMAN AND RABBIT, ADULT, FULL-TERM NEWBORN, PRETERM NEWBORN; LEUKOCYTE ADHESION MOLECULE EXPRESSION, BETA(2)-INTEGRINS,L-SELECTIN; INFLAMMATORY STIMULI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
C. Ramamoorthy et al., "NEUTROPHIL ADHESION MOLECULE EXPRESSION IS COMPARABLE IN PERINATAL RABBITS AND HUMANS", Anesthesiology, 86(2), 1997, pp. 420-427

Abstract

Background: Human newborns, particularly those born before full term,are more susceptible to bacterial infections as a result of impaired host defense mechanisms. Compared with adults, circulating leukocytes from human newborns (preterm and full-term gestations) and newborn rabbits (full-term gestation) have low resting levels of CD62L (L-selectin) and do not significantly increase surface expression of CD18 after inflammatory stimulation. To determine the potential utility of preterm rabbits in investigations of perinatal human conditions, the authorscompared the surface expression of the beta(2)-integrin CD18 and CD62L (L-selectin) on polymorphonuclear leukocytes (PMNs) from perinatal rabbits and perinatal humans, both under resting conditions and after in vitro activation with inflammatory stimulants. Methods: After erythrocyte lysis of whole-blood samples, leukocytes from 7-day-old, full-term (31-day gestation), and preterm (24-day gestation) rabbits, as wellas full-term (37-42 week gestation) and preterm (27-36 week gestation) human newborns were prepared and stimulated ia vitro at 37 degrees Cwith either C5a or phorbol myristate acetate. After fluorescence labeling of CD18 and CD62L with monoclonal antibodies, PMN adhesion molecule expression was assessed by flow cytometry. Results: Constitutive CD18 expression was not significantly different between perinatal and adult humans hut was reduced in all perinatal rabbits compared with adults. Inflammatory stimulation caused significant increases in CD18 expression in adult human PMNs but not in full-term and preterm newborns. Changes in CD18 expression in adult and preterm rabbits after stimulation, although in the same direction as humans, were more variable. In both species, constitutive CD62L expression on PMNs from all perinateswas significantly lower than in adults. However, CD62L was shed to similar degrees after inflammatory stimulation in all groups. Conclusions: Preterm rabbits may provide a potentially useful experimental modelto study PMN adhesion and host defense in the perinatal period, particularly preterm gestations. Specific advantages and limitations of rabbits in such studies are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 17/01/21 alle ore 18:28:20