Department of Histology, Embryology and Applied Biology, Centre of Molecular Genetics, University of Bologna, Via Belmeloro 8, 40126 Bologna, Italy.
Clin Oral Investig. 2012 Apr;16(2):619-23. doi: 10.1007/s00784-011-0539-6. Epub 2011 Mar 24.
Craniofacial morphogenesis is determined by multistep processes involving signalling molecules and transcription factors, which are organised into highly coordinated pathways. Derailment from this intricate network can lead to congenital malformations. Cells migrate from neural crests to populate different structures, such as branchial arches, involved in embryonal orofacial development. The EDN1 pathway is involved in branchial arch development. Gene knockout and knockdown experiments on EDN1 or its downstream effector dHAND resulted in mice that were characterised by craniofacial defects and cleft palate. Our aim was to evaluate whether the transcription factor HAND2 could be implicated in non-syndromic cleft lip with or without cleft palate (CL/P) aetiology. A sample study composed of 39 multiplex Italian pedigrees was enrolled to test linkage between two microsatellite flanking HAND2 locus and CL/P. No evidence of linkage between HAND2 and CL/P was obtained. Indeed, formal levels of exclusion were obtained with different inheritance models. Investigation results did not support a role of HAND2 in CL/P aetiology. Nevertheless a minor contribute of the gene in clefting could not be ruled out.
颅面形态发生由涉及信号分子和转录因子的多步过程决定,这些过程被组织成高度协调的途径。从这个复杂的网络中脱轨会导致先天性畸形。细胞从神经嵴迁移到不同的结构中,如鳃弓,参与胚胎口面发育。EDN1 途径参与鳃弓的发育。EDN1 或其下游效应物 dHAND 的基因敲除和敲低实验导致具有颅面缺陷和腭裂的小鼠。我们的目的是评估转录因子 HAND2 是否与非综合征性唇裂伴或不伴腭裂(CL/P)的病因有关。一项由 39 个意大利多重家系组成的样本研究被纳入,以测试 HAND2 基因座两侧的两个微卫星与 CL/P 之间的连锁关系。在 HAND2 和 CL/P 之间没有发现连锁的证据。事实上,不同的遗传模型都获得了正式的排除水平。研究结果不支持 HAND2 在 CL/P 发病机制中的作用。然而,不能排除该基因在腭裂中的轻微作用。
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