Harlequin ichthyosis (HI) is a severe genetic skin disorder and caused by mutation in the ATP-binding cassette A12 (ABCA12) gene. The retinoid administration has dramatically improved long-term survival of HI, but imp...Harlequin ichthyosis (HI) is a severe genetic skin disorder and caused by mutation in the ATP-binding cassette A12 (ABCA12) gene. The retinoid administration has dramatically improved long-term survival of HI, but improvements are still needed. However, the ABCA12 null mice failed to respond to retinoid treatment, which impedes the development of novel cure strategies for HI. Here we generated an ethylnitrosourea mutagenic HI pig model (named Z9), which carries a novel deep intronic mutation IVS49-727 A>G in the ABCA12 gene, resulting in abnormal mRNA splicing and truncated protein production. Z9 pigs exhibit significant clinical symptom as human patients with HI. Most importantly, systemic retinoid treatment significantly prolonged the life span of the mutant pigs via improving epidermal maturation, decreasing epidermal apoptosis, and triggering the expression of ABCA6. Taken together, this pig model perfectly resembles the clinical symptom and molecular pathology of patients with HI and will be useful for understanding mechanistic insight and developing therapeutic strategies.展开更多
Harlequin ichthyosis is a severe autosomal recessive skin disorder.Most deaths occur within the first few days after birth,and the survivors still have severe chronic skin disease throughout their lives.Almost all cas...Harlequin ichthyosis is a severe autosomal recessive skin disorder.Most deaths occur within the first few days after birth,and the survivors still have severe chronic skin disease throughout their lives.Almost all cases were associated with a pathogenic variant of adenosine triphosphate binding cassette transporter,subfamily A,member 12(ABCA12)gene.We described a case of HI diagnosed by ultrasound examination during the second-trimester and genetic diagnosis reveal two novel heterozygous ABCA12 mutations c.2563-2570delinsGGCAATT,p.(Leu855Glyfs*13),and c.6116delT,p.(Met2039Argfs*8)by the next-generation DNA sequencing,which further enriched our understanding of the pathogenic variation of ABCA12 gene.展开更多
基金the Strategic Priority Research Programs of CAS(XDA16030300)the National Natural Science Foundation of China(81671274,31272440,and 31801031)+1 种基金the National Transgenic Project of China(2016ZX08009003-006-007)the Elite Youth Program of the Chinese Academy of Agricultural Sciences(ASTIP-IAS05).
文摘Harlequin ichthyosis (HI) is a severe genetic skin disorder and caused by mutation in the ATP-binding cassette A12 (ABCA12) gene. The retinoid administration has dramatically improved long-term survival of HI, but improvements are still needed. However, the ABCA12 null mice failed to respond to retinoid treatment, which impedes the development of novel cure strategies for HI. Here we generated an ethylnitrosourea mutagenic HI pig model (named Z9), which carries a novel deep intronic mutation IVS49-727 A>G in the ABCA12 gene, resulting in abnormal mRNA splicing and truncated protein production. Z9 pigs exhibit significant clinical symptom as human patients with HI. Most importantly, systemic retinoid treatment significantly prolonged the life span of the mutant pigs via improving epidermal maturation, decreasing epidermal apoptosis, and triggering the expression of ABCA6. Taken together, this pig model perfectly resembles the clinical symptom and molecular pathology of patients with HI and will be useful for understanding mechanistic insight and developing therapeutic strategies.
基金Cultivating funding of the First Affiliated Hospital of Chongqing Medical University(PYJJ2017-33)
文摘Harlequin ichthyosis is a severe autosomal recessive skin disorder.Most deaths occur within the first few days after birth,and the survivors still have severe chronic skin disease throughout their lives.Almost all cases were associated with a pathogenic variant of adenosine triphosphate binding cassette transporter,subfamily A,member 12(ABCA12)gene.We described a case of HI diagnosed by ultrasound examination during the second-trimester and genetic diagnosis reveal two novel heterozygous ABCA12 mutations c.2563-2570delinsGGCAATT,p.(Leu855Glyfs*13),and c.6116delT,p.(Met2039Argfs*8)by the next-generation DNA sequencing,which further enriched our understanding of the pathogenic variation of ABCA12 gene.
