Ichthyosis in Sjogren-Larsson syndrome

干燥-拉尔森综合征中的鱼鳞病

• 批准号: 7196136
• 负责人: WILLIAM B. RIZZO
• 金额: $ 33.51万
• 依托单位: UNIVERSITY OF NEBRASKA MEDICAL CENTER
• 依托单位国家: 美国
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-10 至 2011-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7196136
• 关键词: adduct; aldehyde dehydrogenases; biopsy; clinical research; congenital ichthyosis; crosslink; dietary lipid; disease /disorder etiology; enzyme activity; enzyme deficiency; gene mutation; genetic disorder; human subject; keratinocyte; laboratory mouse; lipid metabolism; mental retardation; molecular pathology; nutrition related tag; skin; spastic paralysis; tissue /cell culture

DESCRIPTION (provided by applicant): Sjogren-Larsson syndrome (SLS) is an inherited neurocutaneous disorder caused by mutations in the ALDH3A2 gene that encodes fatty aldehyde dehydrogenase (FALDH). The symptoms of SLS include ichthyosis, mental retardation and spasticity, and are hypothesized to arise from the deranged metabolism of fatty aldehydes and precursor lipids such as fatty alcohols, which cannot be metabolized by FALDH. However, little is known about the underlying biochemical pathogenesis of SLS and effective therapy for the disease is lacking. The long-term goal of our research is to understand the pathogenic mechanisms causing the symptoms of SLS in order to develop specific therapy for affected patients. To gain insight into the biochemical and pathologic abnormalities in SLS, we will extensively characterize the biochemical and phenotypic features of a new FALDH-deficient gene knockout mouse model for SLS, and examine the role of genetic background on its phenotypic expression. Cultured keratinocytes, oligodendrocytes and mixed neuronal cells from FALDH-deficient mice will be investigated to reveal cell- specific lipid abnormalities. Using FALDH-deficient mice and cultured cells from SLS patients, we will determine whether FALDH is implicated in the metabolism of fatty aldehydes and fatty alcohols generated from farnesol, w-hydroxy fatty acids and (R)-trioxilin A3. These pathways are potentially amenable to therapeutic intervention with dietary modification and pharmacologic agents. Using immunologic and chemical methods together with mass spectrometry, we will identify the proteins that are covalently modified by fatty aldehyde in SLS cells to gain insight into the pathogenic mechanisms responsible for the cutaneous and neurologic symptoms. In summary, these studies will define the aberrant metabolism in SLS cells arising from FALDH deficiency and take advantage of the first animal model for SLS to uncover new pathogenic mechanisms responsible for cutaneous and neurologic symptoms. This research is directed at investigating Sjogren-Larsson syndrome (SLS), an inherited metabolic disease affecting the skin and brain of children and adults. We will study the abnormal fat metabolism that occurs in skin cells from patients to discover the cause of the symptoms, and characterize a newly developed mouse that has the same metabolic problem as people with SLS in hopes of developing an effective treatment.

描述（由申请人提供）：Sjogren-Larsson综合征（SLS）是一种遗传性神经皮肤疾病，由编码脂肪醛脱氢酶（ALDH）的ALDH 3A 2基因突变引起。SLS的症状包括鱼鳞病、精神发育迟滞和痉挛状态，并且被假设是由脂肪醛和前体脂质（例如脂肪醇）的代谢紊乱引起的，所述脂肪醛和前体脂质不能被β-脱氢酶代谢。然而，对SLS的潜在生化发病机制知之甚少，缺乏有效的治疗方法。我们研究的长期目标是了解导致SLS症状的致病机制，以便为受影响的患者开发特定的治疗方法。为了深入了解SLS中的生化和病理异常，我们将广泛表征一种新的LDH缺陷基因敲除小鼠SLS模型的生化和表型特征，并研究遗传背景对其表型表达的作用。将研究来自CD 3DH缺陷小鼠的培养的角质形成细胞、少突胶质细胞和混合神经元细胞，以揭示细胞特异性脂质异常。使用C3 DH-deficient小鼠和SLS患者的培养细胞，我们将确定C3 DH-deficient是否参与由法尼醇、ω-羟基脂肪酸和（R）-trioxilin A3产生的脂肪醛和脂肪醇的代谢。这些途径有可能通过饮食调整和药物进行治疗干预。使用免疫学和化学方法结合质谱，我们将确定SLS细胞中脂肪醛共价修饰的蛋白质，以深入了解皮肤和神经症状的致病机制。总之，这些研究将确定由EPDH缺乏引起的SLS细胞中的异常代谢，并利用SLS的第一个动物模型来揭示负责皮肤和神经症状的新的致病机制。本研究旨在调查Sjogren-Larsson综合征（SLS），这是一种影响儿童和成人皮肤和大脑的遗传性代谢疾病。我们将研究患者皮肤细胞中发生的异常脂肪代谢，以发现症状的原因，并描述一种新开发的小鼠，该小鼠具有与SLS患者相同的代谢问题，希望开发有效的治疗方法。