成骨不全症患儿脂肪组织源性基质血管成分的特征描述和功能分析。
Characterization and functional analysis of the adipose tissue-derived stromal vascular fraction of pediatric patients with osteogenesis imperfecta.
机构信息
Faculty of Dental Medicine and Oral Health Sciences, McGill University, 2001 Avenue McGill College, Montréal, QC, H3A 1G1, Canada.
Shriners Hospital for Children-Canada, 1003 Decarie Blvd, Montreal, QC, H4A 0A9, Canada.
出版信息
Sci Rep. 2022 Feb 14;12(1):2414. doi: 10.1038/s41598-022-06063-4.
Pediatric patients with Osteogenesis Imperfecta (OI), a heritable connective tissue disorder, frequently suffer from long bone deformations. Surgical correction often results in bone non-unions, necessitating revision surgery with autogenous bone grafting using bone-marrow-derived stem cells (BM-SC) to regenerate bone. BM-SC harvest is generally invasive and limited in supply; thus, adipose tissue's stromal vascular fraction (SVF) has been introduced as an alternative stem cell reservoir. To elucidate if OI patients' surgical site dissected adipose tissue could be used as autologous bone graft in future, we investigated whether the underlying genetic condition alters SVF's cell populations and in vitro differentiation capacity. After optimizing SVF isolation, we demonstrate successful isolation of SVF of pediatric OI patients and non-OI controls. The number of viable cells was comparable between OI and controls, with about 450,000 per gram tissue. Age, sex, type of OI, disease-causing collagen mutation, or anatomical site of harvest did not affect cell outcome. Further, SVF-containing cell populations were similar between OI and controls, and all isolated SVF's demonstrated chondrogenic, adipogenic, and osteogenic differentiation capacity in vitro. These results indicate that SVF from pediatric OI patients could be used as a source of stem cells for autologous stem cell therapy in OI.
患有成骨不全症(OI)的儿科患者,这是一种遗传性结缔组织疾病,经常遭受长骨畸形。手术矫正常常导致骨不愈合,需要进行翻修手术,使用骨髓源性干细胞(BM-SC)自体骨移植来再生骨骼。BM-SC 的采集通常具有侵入性且供应有限;因此,脂肪组织的基质血管部分(SVF)已被引入作为替代干细胞储存库。为了阐明 OI 患者手术部位解剖的脂肪组织是否可用于未来的自体骨移植,我们研究了潜在的遗传状况是否会改变 SVF 的细胞群体和体外分化能力。在优化 SVF 分离后,我们成功分离了儿科 OI 患者和非 OI 对照的 SVF。OI 和对照组之间的活细胞数量相当,每克组织约有 45 万个细胞。年龄、性别、OI 类型、致病胶原突变或采集的解剖部位均未影响细胞结果。此外,OI 和对照组之间的 SVF 所含细胞群体相似,所有分离的 SVF 均在体外表现出软骨形成、脂肪形成和成骨分化能力。这些结果表明,来自儿科 OI 患者的 SVF 可作为 OI 自体干细胞治疗的干细胞来源。