Anti-placental growth factor antibody ameliorates hyperoxia-mediated impairment of lung development in neonatal rats
Braz. j. med. biol. res
;
53(2): e8917, 2020. graf
Article
Dans Anglais
| LILACS
| ID: biblio-1055492
ABSTRACT
This study investigates the effect of the overexpression of the placental growth factor (PGF) and hyperoxia on lung development and determines whether anti-PGF antibody ameliorates hyperoxia-mediated impairment of lung development in newborn rats. After exposure to normoxic conditions for seven days, newborn rats subjected to normoxia were intraperitoneally or intratracheally injected with physiological saline, adenovirus-negative control (Ad-NC), or adenovirus-PGF (Ad-PGF) to create the Normoxia, Normoxia+Ad-NC, and Normoxia+Ad-PGF groups, respectively. Newborn rats subjected to hyperoxia were intraperitoneally injected with physiological saline or anti-PGF antibodies to create the Hyperoxia and Hyperoxia+anti-PGF groups, respectively. Our results revealed significant augmentation in the levels of PGF and its receptor Flt-1 in the lung tissues of newborn rats belonging to the Normoxia+Ad-PGF or Hyperoxia groups. PGF overexpression in these groups caused lung injury in newborn rats, while anti-PGF antibody treatment significantly cured the hyperoxia-induced lung injury. Moreover, PGF overexpression significantly increased TNF-α and Il-6 levels in the bronchoalveolar lavage (BAL) fluid of the Normoxia+Ad-PGF and Hyperoxia groups. However, their levels were significantly reduced in the BAL fluid of the Hyperoxia+anti-PGF group. Immunohistochemical analysis revealed that PGF overexpression and hyperoxia treatment significantly increased the expression of the angiogenesis marker, CD34. However, its expression was significantly decreased upon administration of anti-PGF antibodies (compared to the control group under hyperoxia). In conclusion, PGF overexpression impairs lung development in newborn rats while its inhibition using an anti-PGF antibody ameliorates the same. These results provided new insights for the clinical management of bronchopulmonary dysplasia in premature infants.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Autoanticorps
/
Hyperoxie
/
Lésion pulmonaire
/
Facteur de croissance placentaire
/
Anticorps monoclonaux
Type d'étude:
Étude pronostique
Limites du sujet:
Animaux
/
Grossesse
langue:
Anglais
Texte intégral:
Braz. j. med. biol. res
Thème du journal:
Biologie
/
Médicament
Année:
2020
Type:
Article
Pays d'affiliation:
Chine
Institution/Pays d'affiliation:
Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine/CN
/
Children's Hospital, Zhejiang University School of Medicine/CN
/
Zhejiang University School of Medicine/CN
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