这篇文章的发表,改变了一个世纪来科学家们普遍认可的观点:单一星形胶质源性细胞参与脊髓损伤后瘢痕形成的理论。
中枢神经系统损伤后缺损组织的再生是有限的,并且缺损区有瘢痕组织填充。 瘢痕组织一直以来被认为是胶质瘢痕,因为富含星形胶质细胞。瘢痕的作用影响是复杂的,一个多世纪以来一直存在争议。瑞典科学家最新实验证实一种特殊的周细胞亚型引起形成瘢痕的间质细胞的产生,在损伤脊髓中它的数量远大于星形胶质细胞。通过外周细胞亚型阻断前体细胞的再生可导致密封损伤组织失效。许多创伤和病理过程都普遍存在结缔组织的形成,通过该实验科学家证实纤维化存在另一种细胞来源。
部分原文:There is limited regeneration of lost tissue after central nervous system injury, and the lesion is sealed with a scar. The role of the scar, which often is referred to as the glial scar because of
its abundance of astrocytes, is complex and has been discussed for more than a century. Here we
show that a specific pericyte subtype gives rise to scar-forming stromal cells, which outnumber
astrocytes, in the injured spinal cord. Blocking the generation of progeny by this pericyte subtype
results in failure to seal the injured tissue. The formation of connective tissue is common to
many injuries and pathologies, and here we demonstrate a cellular origin of fibrosis.
引自:A Pericyte Origin of Spinal Cord Scar Tissue,Christian Göritz et al. Science 333, 238 (2011); DOI: 10.1126/science.1203165
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