Adipose-derived mesenchymal stromal cells prevented rat vocal fold scarring

作者：Morisaki Tsuyoshi; Kishimoto Yo; Tateya Ichiro; Kawai Yoshitaka; Suzuki Ryo; Tsuji Takuya; Hiwatashi Nao; Nakamura Tatsuo; Omori Koichi; Kitano Hiroya; Takeuchi Hiromi; Hirano Shigeru^*

来源：Laryngoscope, 2018, 128(1): E33-E40.

DOI：10.1002/lary.26772

• Mesenchymal stromal cell
• vocal fold scarring
• adipose
• wound healing

Objectives/HypothesisThis study aimed to reveal the effects of adipose-derived mesenchymal stromal cells (ASCs) on prevention of vocal fold scarring by investigating how the immediate ASCs transplantation into the injured rat vocal fold affect the levels of gene transcription and translation.
Study DesignProspective animal experiments with controls.
MethodsASCs harvested from green fluorescent protein transgenic rat (ASCs group) or saline (sham group) were injected into the thyroarytenoid muscle of Sprague-Dawley rats immediately after stripping the vocal fold. For histological examinations, larynges were extirpated at 3, 14, and 56 days after the injection. Quantitative real-time polymerase chain reaction (PCR) analyses were performed at 3 and 14 days after the injection.
ResultsTransplanted ASCs were detected only in larynges at day 3. At days 14 and 56, histological examination showed significantly higher amounts of hyaluronic acid and lower deposition of collagen in the ASCs group compared to the sham group. Real-time PCR revealed that the ASCs group showed low expression of procollagen (Col)1a1, Col1a3, matrix metalloproteinase (Mmp)1 and Mmp8 in each time points. The ASCs group showed high expression of fibroblast growth factor (Fgf)2 and Hepatocyte growth factor (Hgf) compared to the sham group at day 14.
ConclusionsASCs increased expressions of Fgf2 and Hgf, and suppressed excessive collagen deposition during vocal fold wound healing. Given the fact that ASCs survived no more than 14 days, ASCs were thought to induce upregulations of growth factors' genes in surrounding cells. These results suggested that ASCs have potential to prevent vocal fold scarring.
Level of EvidenceNA. Laryngoscope, 128:E33-E40, 2018

• 出版日期2018-1