组织工程与重建外科杂志2026，Vol.22Issue(2)：140-152,13.DOI:10.3969/j.issn.1673-0364.2026.02.006
并指(趾)症:表型分类、致病基因与肢端发育机制的研究进展
Syndactyly:Recent progress in phenotypic classification,pathogenic genes,and distal limb developmental mechanisms
摘要
Abstract
Syndactyly is one of the most common congenital malformations of the hands and feet,characterized by soft-tissue or bony fusion between adjacent digits,and clinically categorized into isolated and syndromic forms.Based on clinical phenotypes and molecular-genetic evidence,isolated syndactyly has been classified into nine categories comprising sixteen subtypes.Prior studies have largely focused on case reports,identification of causative genes,or phenotypic overviews,whereas systematic developmental-biology interpretations of its molecular pathology remain limited.This review integrates key processes in limb development,including early limb bud formation,patterning of the proximodistal and anteroposterior axes,and molecular regulation of interdigital programmed cell death.Furthermore,the pathogenic pathways and key nodes involved in syndactyly across 3 themes are delineated:the WNT-FGF8 axis,the SHH-BMP axis,and retinoic acid signaling together with apoptosis and extracellular matrix remodeling.The article holds that syndactyly fundamentally reflects a failure in the closure of the interdigital morphogenetic window.Its molecular basis lies in the disruption of the temporal coordination by developmental signals that govern tissue fate transition,programmed cell death,and extracellular matrix clearance.This framework may provide a new theoretical basis for the precise classification and etiological interpretation of the disorder.关键词
并指(趾)症/肢端发育/WNT-FGF8轴/SHH-BMP通路/视黄酸Key words
Syndactyly/Limb development/WNT-FGF8 axis/SHH-BMP pathway/Retinoic acid分类
医药卫生引用本文复制引用
郭旻皓,王国钰,何小鹏,田静,李会晓..并指(趾)症:表型分类、致病基因与肢端发育机制的研究进展[J].组织工程与重建外科杂志,2026,22(2):140-152,13.基金项目
国家自然科学基金面上项目(32170618). （32170618）
