Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0004352 (autism)
 32,579 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Tuberous sclerosis complex (TSC) is an autosomal dominant disorder in humans characterized by the development of hamartomas in several organs, including renal angiomyolipomas, cardiac rhabdomyomas and subependymal giant cell astrocytomas. TSC causes disabling neurologic disorders, including epilepsy, mental retardation and autism. Brain lesions, including subependymal and subcortical hamartomas, have also been reported in TSC patients. TSC is associated with hamartomas and renal cell carcinoma (RCC) as well as sporadic tumors in TSC patient. Renal angiomyolipomas associated with TSC tend to be larger, bilateral, multifocal and present at a younger age compared with sporadic forms. Tuberous sclerosis complex of 2 genes, TSC2 encodes a protein called tuberin that normally exists in an active state and forms a heterodimeric complex with hamartin, the protein encoded by the TSC1. Deficiency ofTSC2 in Eker rat is associated with the development of tumors in several organs including kidney. The majority of renal cell tumors observed in the Eker rat originates from renal proximal tubules and are histologically similar to renal cell carcinoma in humans. On the other hand, mutations in DNA repair enzyme 8-oxoG-DNA glycosylase (OGG1) are associated with cancer. OGG1 gene is found somatically mutated in some cancer cells and is highly polymorphic among human cancers. Moreover, knockout mice in OGG1 developed spontaneously adenoma and carcinoma. We recently show that the constitutive expression of OGG1 in heterozygous (TSC2+/-) Eker rat and in angiomyolipomas kidney tissue from human is 2-3fold less than in kidney from wild-type rats and control human subjects. In addition, we show that loss of TSC2 in kidney tumor of Eker rat is associated with loss of OGG1 and accumulation significant levels of oxidative DNA damage 8-oxo-deoxyguanine suggesting that TSC2 and OGG1 play a major role in renal tumorigenesis.
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PMID:Tuberous sclerosis complex and DNA repair. 2068 97

Tuberous sclerosis complex (TSC) is an autosomal dominant and multi-system genetic disorder in humans. TSC affects around 25,000 to 40,000 individuals in the United States and about 1 to 2 million individuals worldwide, with an estimated prevalence of one in 6,000 newborns. TSC occurs in all races and ethnic groups, and in both genders. TSC is caused by defects or mutations in two genes, TSC1 and TSC2. Loss of TSC1/TSC2 leads to dysregulation of mTOR, resulting in aberrant cell differentiation and development, and abnormal enlargement of cells. TSC is characterized by the development of benign and/or malignant tumors in several organs including renal/liver angiomyolipomas, facial angiofibroma, lymphangiomyomatosis, cardiac rhabdomyomas, retinal astrocytic, renal cell carcinoma, and brain subependymal giant cell astrocytomas (SEGA). In addition, TSC disease causes disabling neurologic disorders, including epilepsy, mental retardation and autism. Particularly problematic are the development of renal angiomyolipomas, which tend to be larger, bilateral, multifocal and present at a younger age compared with sporadic forms. In addition, SEGA block the flow of fluid within the brain, causing a buildup of fluid and pressure that leads to blurred vision and seizures. In the current review, we describe the pathology of TSC disease in key organs and summarize the use of mTOR inhibitors to treat tumors in TSC patients.
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PMID:Is mTOR Inhibitor Good Enough for Treatment All Tumors in TSC Patients? 2769 99

Chromosome 15q11-q13.1 duplication is a common copy number variant associated with autism spectrum disorder (ASD). Most cases are de novo, maternal in origin and fully penetrant for ASD. Here, we describe a unique family with an interstitial 15q11.2-q13.1 maternal duplication and the presence of somatic mosaicism in the mother. She is typically functioning, but formal autism testing showed mild ASD. She had several congenital anomalies, and she is the first 15q Duplication case reported in the literature to develop unilateral renal carcinoma. Her two affected children share some of these clinical characteristics, and have severe ASD. Several tissues in the mother, including blood, skin, a kidney tumor, and normal kidney margin tissues were studied for the presence of the 15q11-q13.1 duplication. We show the mother has somatic mosaicism for the duplication in several tissues to varying degrees. A growth competition assay in two types of stem cells from duplication 15q individuals was also performed. Our results suggest that the presence of this interstitial duplication 15q chromosome may confer a previously unknown growth advantage in this particular individual, but not in the general interstitial duplication 15q population.
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PMID:A Rare Inherited 15q11.2-q13.1 Interstitial Duplication with Maternal Somatic Mosaicism, Renal Carcinoma, and Autism. 2793 89

Tuberous sclerosis complex (TSC) is an autosomal dominant disease characterized by hamartomatous tumours of the brain, heart, skin, lung and kidney. Patients with TSC show a diverse range of neurological features (including seizures, cognitive disability and autism) and renal manifestations (including angiomyolipomas, epithelial cysts and renal cell carcinoma (RCC)). TSC is caused by inactivating mutations in TSC1 and TSC2, which encode hamartin and tuberin, respectively. These two proteins form a complex that negatively regulates mechanistic target of rapamycin complex 1 (mTORC1), a master regulator of cellular growth and metabolism. In clinical trials, allosteric inhibitors of mTORC1 decrease angiomyolipoma size, but the tumours regrow after treatment cessation. Therefore, the development of strategies to eliminate rather than suppress angiomyolipomas remains a high priority. This Review describes important advances in the TSC field and highlights several remaining critical knowledge gaps: the factors that promote aggressive behaviour by a subset of TSC-associated RCCs; the molecular mechanisms underlying early-onset cystogenesis in TSC2-PKD1 contiguous gene deletion syndrome; the effect of early, long-term mTORC1 inhibition on the development of TSC renal disease; and the identification of the cell or cells of origin of angiomyolipomas.
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PMID:Renal disease in tuberous sclerosis complex: pathogenesis and therapy. 3023 10

Tryptophan is an essential plant-derived amino acid that is needed for the in vivo biosynthesis of proteins. After consumption, it is metabolically transformed to bioactive metabolites, including serotonin, melatonin, kynurenine, and the vitamin niacin (nicotinamide). This brief integrated overview surveys and interprets our current knowledge of the reported multiple analytical methods for free and protein-bound tryptophan in pure proteins, protein-containing foods, and in human fluids and tissues, the nutritional significance of l-tryptophan and its isomer d-tryptophan in fortified infant foods and corn tortillas as well the possible function of tryptophan in the diagnosis and mitigation of multiple human diseases. Analytical methods include the use of acid ninhydrin, near-infrared reflectance spectroscopy, colorimetry, basic hydrolysis; acid hydrolysis of S-pyridylethylated proteins, and high-performance liquid and gas chromatography-mass spectrometry. Also covered are the nutritional values of tryptophan-fortified infant formulas and corn-based tortillas, safety of tryptophan for human consumption and the analysis of maize (corn), rice, and soybean plants that have been successfully genetically engineered to produce increasing tryptophan. Dietary tryptophan and its metabolites seem to have the potential to contribute to the therapy of autism, cardiovascular disease, cognitive function, chronic kidney disease, depression, inflammatory bowel disease, multiple sclerosis, sleep, social function, and microbial infections. Tryptophan can also facilitate the diagnosis of certain conditions such as human cataracts, colon neoplasms, renal cell carcinoma, and the prognosis of diabetic nephropathy. The described findings are not only of fundamental scientific interest but also have practical implications for agriculture, food processing, food safety, nutrition, and animal and human health. The collated information and suggested research need will hopefully facilitate and guide further studies needed to optimize the use of free and protein-bound tryptophan and metabolites to help improve animal and human nutrition and health.
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PMID:Analysis, Nutrition, and Health Benefits of Tryptophan. 3027