Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0004153 (atherosclerosis)
 77,401 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The premature ageing ataxia telangiectasia (AT) and Werner syndromes (WS) are associated with accelerated cellular ageing. Young WS fibroblasts have an aged appearance and activated p38 MAP kinase, and treatment with the p38 inhibitor SB230580 extends their lifespan to within the normal range. SB203580 also extends the replicative lifespan of normal adult dermal fibroblasts, however, the effect is much reduced when compared to WS cells, suggesting that WS fibroblasts undergo a form of stress-induced premature senescence (SIPS). A small lifespan extension is seen in AT cells, which is not significant compared to normal fibroblasts, and the majority of young AT cells do not have an aged appearance and lack p38 activation, suggesting that the premature ageing does not result from SIPS. The lack of p38 activation is supported by the clinical manifestation, since AT is not associated with inflammatory disease, whereas WS individuals are predisposed to atherosclerosis, type II diabetes and osteoporosis, conditions known to be associated with p38 activation.
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PMID:Assessing the role of stress signalling via p38 MAP kinase in the premature senescence of ataxia telangiectasia and Werner syndrome fibroblasts. 1883 Jun 81

Werner's syndrome (WS) is an autosomal recessive disorder characterized by premature aging. The main features of the disease are scleroderma-like skin appearance, premature atherosclerosis, short stature, diabetes mellitus, early osteoporosis and early aging. Herein, we describe a patient with WS, who has scleroderma-like skin changes and discuss the literature about WS as a disease in the differential diagnosis of systemic sclerosis.
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PMID:Werner's syndrome: a quite rare disease for differential diagnosis of scleroderma. 1949 68

Werner's syndrome (WS) is a rare human autosomal recessive segmental progeroid syndrome clinically characterized by atherosclerosis, cancer, osteoporosis, type 2 diabetes mellitus and ocular cataracts. The WRN gene codes for a RecQ helicase which is present in many tissues. Although the exact functions of the WRN protein remain unclear, accumulating evidence suggests that it participates in DNA repair, replication, recombination and telomere maintenance. It has also been proposed that WRN participates in RNA polymerase II-dependent transcription. However no promoter directly targeted by WRN has yet been identified. In this work, we report mammalian genes that are WRN targets. The rat CYP2B2 gene and its closely related mouse homolog, Cyp2b10, are both strongly induced in liver by phenobarbital. We found that there is phenobarbital-dependent recruitment of WRN to the promoter of the CYP2B2 gene as demonstrated by chromatin immunoprecipitation analysis. Mice homozygous for a Wrn mutation deleting part of the helicase domain showed a decrease in basal and phenobarbital-induced CYP2B10 mRNA levels compared to wild type animals. The phenobarbital-induced level of CYP2B10 protein was also reduced in the mutant mice. Electrophoretic mobility shift assays showed that WRN can participate in the formation of a complex with a specific sequence within the CYP2B2 basal promoter. Hence, there is a WRN binding site in a region of DNA sequence to which WRN is recruited in vivo. Taken together, these results suggest that WRN participates in transcription of CYP2B genes in liver and identifies the first physical interaction between a specific promoter sequence and WRN.
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PMID:Werner's syndrome helicase participates in transcription of phenobarbital-inducible CYP2B genes in rat and mouse liver. 1973 42

The pathophysiological process of natural human aging has not been studied adequately due to the lack of an appropriate human model. Since recent investigations have suggested that inflammation possibly contributes to the pathogenesis of age-related disorders including atherosclerosis, cancer, and diabetes mellitus, the term "inflammaging," a combination of "inflammation" and "aging," has been coined. Werner syndrome (WS), caused by the loss of function of RecQ3 DNA/RNA helicase, is a typical progeroid syndrome mimicking natural aging, although it is extremely rare outside of Japan. We sought to examine WS patients from an immunological/inflammatory perspective. Sera from 14 mutation-proven WS patients (ages: 33-70 years) and 21 healthy Japanese adults ages 15 to 95 years were examined with ELISA for soluble Fas ligand (sFasL) to compare conventional inflammation markers. With natural aging, a statistically significant correlation (p < 0.0001) was observed in the serum level of sFasL. The sFasL in WS, a level comparable to that in healthy elderly ages 83 to 95 years, had significantly increased (p < 0.05) compared to that in young healthy individuals ages 15 to 70 years. A significant correlation was noted between the serum levels of conventional inflammation markers such as CRP (p < 0.025), ESR (p < 0.024), and WBC count (p < 0.0085). In conclusion, an increased level of serum sFasL in natural aging and WS patients may suggest a common pathophysiological mechanism: inflammation. WS may be a good model for analyzing inflammaging.
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PMID:Elevation of soluble Fas (APO-1, CD95) ligand in natural aging and Werner syndrome. 2010 15

Complete loss of function in the WRN: RecQ3 DNA/RNA helicase gene causes Werner Syndrome (WS). WS patients with genetic instability manifest an early onset of age-related diseases including diabetes mellitus (DM), osteoporosis, atherosclerosis, and malignancy as well as early death. In 1,420 patients, WS was reported to be associated with chromosomal abnormality syndrome and other genetic diseases including Klinefelter syndrome in 2 patients, retinitis pigmentosa in 3, Wilson's disease in 1, xeroderma pigmentosum in 3, and porokeratosis Mibelli in 1. These clinical findings may support the concept of genetic instability in WS.
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PMID:Syndrome-causing mutations in Werner syndrome. 2010 20

Classical Hutchinson-Gilford progeria syndrome (HGPS) is caused by LMNA mutations that generate an alternatively spliced form of lamin A, termed progerin. HGPS patients present in early childhood with atherosclerosis and striking features of accelerated aging. We report on two pedigrees of adult-onset coronary artery disease with progeroid features, who were referred to our International Registry of Werner Syndrome (WS) because of clinical features consistent with the diagnosis. No mutations were identified in the WRN gene that is responsible for WS, among these patients. Instead, we found two novel heterozygous mutations at the junction of exon 10 and intron 11 of the LMNA gene. These mutations resulted in the production of progerin at a level substantially lower than that of HGPS. Our findings indicate that LMNA mutations may result in coronary artery disease presenting in the fourth to sixth decades along with short stature and a progeroid appearance resembling WS. The absence of early-onset cataracts in this setting should suggest the diagnosis of progeroid laminopathy. This study illustrates the evolving genotype-phenotype relationship between the amount of progerin produced and the age of onset among the spectrum of restrictive dermopathy, HGPS, and atypical forms of WS.
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PMID:Coronary artery disease in a Werner syndrome-like form of progeria characterized by low levels of progerin, a splice variant of lamin A. 2206 2

Werner syndrome (WS) is an autosomal recessive progeroid disorder caused by mutations in the WRN DNA helicase. It is characterized by the graying and loss of hair, juvenile cataracts, sclerosis and ulceration of skin, insulin-resistant diabetes mellitus, dyslipidemia, abdominal adiposity, osteoporosis, atherosclerosis, and malignant neoplasm. Patients are usually diagnosed in their 30s or 40s, but the early pathophysiology of the syndrome is still not fully understood. Here we report a 29-year-old female patient who displayed cataracts, hair graying, and tendinous calcinosis. Her parents were first cousins. Interestingly, the patient lacked the metabolic signs typical for WS, including glucose intolerance, dyslipidemia, and visceral fat accumulation. A hyperinsulinemic response at 30 min was observed in an oral glucose tolerance test. Mutational analysis for the WRN gene revealed a homozygous nucleotide substitution 3190C>T in exon 24, resulting in a protein product with replacement of an arginine residue at position 573 by termination codon (Arg987Ter). The mutated WRN protein was unable to translocate into the nucleus in an in vitro cell assay. A WS patient with an Arg987Ter mutation has been previously reported in Switzerland, the present case is the first to be identified in Asia. This case demonstrates the early clinical features of WS and suggests that metabolic abnormality, including insulin resistance, is not an essential component of WS at disease onset. Moreover, a follow-up study of such case would be useful to understand how the various clinical symptoms in WS develop and progress over the years.
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PMID:A case of Werner syndrome without metabolic abnormality: implications for the early pathophysiology. 2218 95

Hutchinson-Gilford Progeria syndrome (HGPS) is a rare genetic disorder, characterized by several clinical features that begin in early childhood, recalling an accelerated aging process. The diagnosis of HGPS is based on the recognition of common clinical features and detection of the recurrent heterozygous c.1824C>T (p.Gly608Gly) mutation within exon 11 in the Lamin A/C encoding gene (LMNA). Besides "typical HGPS," several "atypical progeria" syndromes (APS) have been described, in a clinical spectrum ranging from mandibuloacral dysplasia to atypical Werner syndrome. These patients's clinical features include progeroid manifestations, such as short stature, prominent nose, premature graying of hair, partial alopecia, skin atrophy, lipodystrophy, skeletal anomalies, such as mandibular hypoplasia and acroosteolyses, and in some cases severe atherosclerosis with metabolic complications. APS are due in several cases to de novo heterozygous LMNA mutations other than the p.Gly608Gly, or due to homozygous BAFN1 mutations in Nestor-Guillermo Progeria syndrome (NGPS). We report here and discuss the observation of a non-consanguineous Moroccan patient presenting with atypical progeria. The molecular studies showed the heterozygous mutation c.412G>A (p.Glu138Lys) of the LMNA gene. This mutation, previously reported as a de novo mutation, was inherited from the apparently healthy father who showed a somatic cell mosaicism.
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PMID:An inherited LMNA gene mutation in atypical Progeria syndrome. 2299 Dec 22

Werner syndrome, also called progeria of the adult and pangeria is a rare autosomal recessive disorder that affects connective tissue throughout the body. It is associated with premature ageing and an increased risk of cancer and other diseases. The mean survival for patients with Werner syndrome is 47 years. Death usually occurs when patients are aged 30-65 years because of atherosclerosis or malignant tumours. The purpose of this paper is to present a patient with Werner syndrome exhibiting a chondrosarcoma of the left temporomandibular joint and ramus. To the best of our knowledge this is the first case, of a Werner syndrome patient with an associated head and neck chondrosarcoma being reported. The diagnostic procedure followed and management of the patient are outlined in the paper as well.
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PMID:Chondrosarcoma of the mandibular condyle in a patient with Werner syndrome: a case report. 2335 32

Werner syndrome (WS; MIM#277700) or adult progeria, is a rare disease, associated with mutations of a single gene (RECQL2 or WRN), located on chromosome 8 (8p12). It codes a DNA-helicase, whose defects cause genomic instability. The highest incidences are reported in Japan and Sardinia (Italy). On this major island of the Mediterranean Basin, the WS cases have been observed in the northern areas. The authors describe the apparently first case reported in southern Sardinia, a 51-year-old woman, who was born in and resides in the province of Cagliari. She presented with a 9-year history of an intractable leg ulcer and other characteristic symptoms, including "bird-like" face, high-pitched voice, premature greying, short stature, abdominal obesity in contrast with thin body type, scleroderma-like legs, decreased muscle mass, diabetes, atherosclerosis, and premature menopause. A specialized genetic Institute of Research (IRCCS-IDI, Rome) confirmed the clinical diagnosis. There is no cure or specific treatment and patients must be periodically screened for an increased risk of cardiovascular and cerebrovascular disease and malignancies. Among the many findings, leg ulcers significantly affect the patient's quality of life. This problem may send the patient to the dermatologist, who finally suspects the diagnosis. Poor response to medical treatment may require aggressive repeated surgery, with poor or temporary results.
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PMID:Leg ulcer in Werner syndrome (adult progeria): a case report. 2355 3


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