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Research: An intra-amniotic injection of mesenchymal stem cells promotes lung maturity in a rat congenital diaphragmatic hernia model.

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Research: An intra-amniotic injection of mesenchymal stem cells promotes lung maturity in a rat congenital diaphragmatic hernia model.

Pediatr Surg Int. 2019 Sep 26. doi: 10.1007/s00383-019-04561-7. [Epub ahead of print]

An intra-amniotic injection of mesenchymal stem cells promotes lung maturity in a rat congenital diaphragmatic hernia model.

Takayama S1,2Sakai K3Fumino S3Furukawa T3Kishida T4Mazda O4Tajiri T3.

https://www.ncbi.nlm.nih.gov/pubmed/31559457

Author information

1Department of Pediatric Surgery, Kyoto Prefectural University of Medicine, 465 Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan. taka0815@koto.kpu-m.ac.jp.2Department of Immunology, Kyoto Prefectural University of Medicine, Kyoto, Japan. taka0815@koto.kpu-m.ac.jp.3Department of Pediatric Surgery, Kyoto Prefectural University of Medicine, 465 Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, 602-8566, Japan.4Department of Immunology, Kyoto Prefectural University of Medicine, Kyoto, Japan.

Abstract

PURPOSE:

We aimed to evaluate the effect of human mesenchymal stem cells (hMSCs) on congenital diaphragmatic hernia (CDH) by intra-amniotic injection in a rat CDH model.

METHODS:

Nitrofen (100 mg) was administered to pregnant rats at E9.5. hMSCs (1.0 × 106) or PBS was injected into each amniotic cavity at E18, and fetuses were harvested at E21. The fetal lungs were classified into normal, CDH, and CDH-hMSCs groups. To determine the lung maturity, we assessed the alveolar histological structure by H&E and Weigert staining and the alveolar arteries by Elastica Van Gieson (EVG) staining. TTF-1, a marker of type II alveolar epithelial cells, was also evaluated by immunohistochemical staining and real-time reverse transcription polymerase chain reaction.

RESULTS:

The survival rate after intra-amniotic injection was 72.1%. The CDH-hMSCs group had significantly more alveoli and secondary septa than the CDH group (p < 0.05). The CDH-hMSCs group had larger air spaces and thinner alveolar walls than the CDH group (p < 0.05). The medial and adventitial thickness of the pulmonary artery in the CDH-hMSCs group were significantly better (p < 0.001), and there were significantly fewer TTF-1-positive cells than in the CDH group (p < 0.001).

CONCLUSION:

These results suggest that intra-amniotic injection of hMSCs has therapeutic potential for CDH.

KEYWORDS:

Congenital diaphragmatic hernia; Fetal therapy; Intra-amniotic injection; Lung hypoplasia; Mesenchymal stem cell; NitrofenPMID: 31559457 DOI: 10.1007/s00383-019-04561-7

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