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Hyperhomocysteinemia

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https://www.readbyqxmd.com/read/29448287/-significance-of-homocysteine-in-glaucoma
#1
Anselm Jünemann, Robert Rejdak, Bettina Hohberger
Endothelial dysfunction and vascular dysregulation play a role in the multifactorial pathogenesis of glaucomatous optic nerve atrophy. Hyperhomocysteinemia is a risk factor for endothelial dysfunction and is associated with primary open-angle glaucoma as well as secondary open-angle glaucoma in the pseudoexfoliation syndrome. This paper reviews the literature on the association between homocysteine metabolism and glaucomatous disease and explains the possible role of hyperhomocysteinemia in the pathogenesis and progression of glaucoma...
February 2018: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29428336/genetic-variations-of-mthfr-gene-and-their-association-with-preterm-birth-in-korean-women
#2
In Wook Hwang, Yun Dan Kang, Bit Na Kwon, Jun Ho Hong, Seung Hun Han, Jong Soo Kim, Jin Wan Park, Han Jun Jin
BACKGROUND AND OBJECTIVE: The MTHFR gene encodes the methylenetetrahydrofolate reductase known to be involved in the homocysteine-methionine pathway. It has been reported that the deficiency of MTHFR activity may cause hyperhomocysteinemia which results in adverse pregnancy outcomes. Previous studies reported a correlation between the MTHFR gene polymorphisms (677 T/C and 1298 A/C) and lower MTHFR activity and its association with preterm birth in various populations. Since these results were conflicting, we analyzed the genetic association of MTHFR gene 677 T/C and 1298 A/C polymorphisms with preterm birth in Korean women...
February 3, 2018: Medicina
https://www.readbyqxmd.com/read/29424201/hereditary-hyperhomocysteinemia-associated-with-nephrotic-syndrome-complicated-by-artery-thrombosis-and-chronic-thromboembolic-pulmonary-hypertension-a-case-report
#3
Paolo Ruggeri, Federica Lo Bello, Francesco Nucera, Michele Gaeta, Francesco Monaco, Gaetano Caramori, Giuseppe Girbino
We present here the case of a 30-year-old man with a long term history of nephrotic syndrome (NS) who developed an episode of acute left main pulmonary artery thrombosis complicated by a lung abscess. During the hospital admission was also identified a concomitant hyperhomocysteinemia. After an atypical resection of the left upper pulmonary lobe and the starting of long term anticoagulation the patient was discharged but did not attend the planned follow up visits until one year later when he was seen again for severe dyspnea and exercise intolerance...
December 19, 2017: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
https://www.readbyqxmd.com/read/29421402/serum-homocysteine-arsenic-methylation-and-arsenic-induced-skin-lesion-incidence-in-bangladesh-a-one-carbon-metabolism-candidate-gene-study
#4
Megan M Niedzwiecki, Xinhua Liu, Huiping Zhu, Megan N Hall, Vesna Slavkovich, Vesna Ilievski, Diane Levy, Abu B Siddique, Muhammad G Kibriya, Faruque Parvez, Tariqul Islam, Alauddin Ahmed, Ana Navas-Acien, Joseph H Graziano, Richard H Finnell, Habibul Ahsan, Mary V Gamble
BACKGROUND: Inorganic arsenic (As) is methylated via one carbon metabolism (OCM) to mono- and dimethylated arsenicals (MMA and DMA), facilitating urinary excretion. Hyperhomocysteinemia (HHcys), a marker of impaired OCM, is a risk factor for As-induced skin lesions, but the influences of single nucleotide polymorphisms (SNPs) in OCM genes on Hcys, As metabolism and skin lesion risk is unclear. OBJECTIVES: To (i) explore genetic sources of Hcys and the causal role of HHcys in As-induced skin lesion development using OCM genetic proxies for HHcys and (ii) identify OCM SNPs associated with urinary As metabolite proportions and/or skin lesion incidence...
February 2, 2018: Environment International
https://www.readbyqxmd.com/read/29415998/homocysteine-activates-autophagy-by-inhibition-of-cftr-expression-via-interaction-between-dna-methylation-and-h3k27me3-in-mouse-liver
#5
Anning Yang, Yun Jiao, Songhao Yang, Mei Deng, Xiaoling Yang, Caiyan Mao, Yue Sun, Ning Ding, Nan Li, Minghao Zhang, Shaoju Jin, Huiping Zhang, Yideng Jiang
Elevated homocysteine (Hcy) levels have been reported to be involved in liver injury, and autophagy plays an important role in normal hepatic physiology and pathophysiology, but the mechanism underlying Hcy regulated autophagy is currently unknown. In this study, CBS+/- mice were fed with regular diet for 12 weeks to establish a hyperhomocysteinemia (HHcy) model and HL-7702 cells were treated with Hcy, we found that Hcy increases autophagy and aggravates liver injury by downregulation of cystic fibrosis transmembrane conductance regulator (CFTR) expression in vivo and in vitro...
February 7, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29414770/homocysteine-regulates-fatty-acid-and-lipid-metabolism-in-yeast
#6
Myriam Visram, Maja Radulovic, Sabine Steiner, Nermina Malanovic, Thomas O Eichmann, Heimo Wolinski, Gerald N Rechberger, Oksana Tehlivets
S-adenosyl-L-homocysteine hydrolase (AdoHcy hydrolase; Sah1 in yeast/AHCY in mammals) degrades AdoHcy, a byproduct and strong product inhibitor of S-adenosyl-L-methionine (AdoMet)-dependent methylation reactions, to adenosine and homocysteine (Hcy). This reaction is reversible, so any elevation of Hcy levels, such as in hyperhomocysteinemia (HHcy), drives the formation of AdoHcy, with detrimental consequences for cellular methylation reactions. HHcy, a pathological condition linked to cardiovascular and neurological disorders as well as fatty liver amongst others, is associated with a deregulation of lipid metabolism...
February 6, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29413962/homocysteine-causes-dysfunction-of-chondrocytes-and-oxidative-stress-through-repression-of-sirt1-ampk-pathway-a-possible-link-between-hyperhomocysteinemia-and-osteoarthritis
#7
Ching-Hou Ma, Yen Chun Chiua, Chin-Hsien Wu, I-Ming Jou, Yuan-Kun Tu, Ching-Hsia Hung, Pei-Ling Hsieh, Kun-Ling Tsai
Emerging evidence has indicated that the perturbed expression of homocysteine (Hcy) may induce mitochondrial dysfunction and disturb bone metabolism. Sirtuin 1 (SIRT1) and AMP-activated protein kinase (AMPK) are two critical sensors that regulate mitochondrial biogenesis and have been recognized as therapeutic targets in osteoarthritis (OA). This study was designed to test whether Hcy caused pro-osteoarthritic changes through modulation of SIRT1 and AMPK. Our results showed that administration of Hcy reduced the SIRT1/AMPK/PGC-1α signaling in chondrocytes, leading to mitochondrial dysfunction as a result of increased oxidative stress and apoptosis...
January 31, 2018: Redox Biology
https://www.readbyqxmd.com/read/29407547/genetic-variants-of-the-folate-metabolic-system-and-mild-hyperhomocysteinemia-may-affect-adhd-associated-behavioral-problems
#8
Tanusree Saha, Mahasweta Chatterjee, Deepak Verma, Anirban Ray, Swagata Sinha, Usha Rajamma, Kanchan Mukhopadhyay
An etiologically complex disorder, Attention Deficit Hyperactivity Disorder (ADHD), is often associated with various levels of cognitive deficit. Folate/vitamin B9 is crucial for numerous biochemical pathways including neural stem cell proliferation and differentiation, regulation of gene expression, neurotransmitter synthesis, myelin synthesis and repair, etc. and a scarcity has often been linked to cognitive deficit. Our pilot study in the field revealed significant association of few genetic variants with ADHD...
January 31, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29398341/inflammation-and-nutritional-status-assessment-by-malnutrition-inflammation-score-and-its-outcome-in-pre-dialysis-chronic-kidney-disease-patients
#9
D Jagadeswaran, E Indhumathi, A J Hemamalini, V Sivakumar, P Soundararajan, M Jayakumar
BACKGROUND: Malnutrition-inflammation complex syndrome (MICS), hyperhomocysteinemia, calcium and phosphate levels derangement have been predicted as important contributing factors for the progression of cardiovascular burden. Among patients with earlier stage of CKD, hypoalbuminaemia and inflammation deliberated as non-traditional cardiovascular risk factors, which add more burden to circulatory disease, mortality and rapid advancement to CKD stage 5. AIM: The aim of the study is to evaluate inflammation and nutritional status of CKD patients not on dialysis using Malnutrition inflammation score (MIS) and to verify the association with mortality in the follow-up period...
January 9, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29395581/association-of-elevated-homocysteine-levels-and-methylenetetrahydrofolate-reductase-mthfr-1298-a%C3%A2-%C3%A2-c-polymorphism-with-vitiligo-susceptibility-in-gujarat
#10
Shahnawaz D Jadeja, Mohmmad Shoab Mansuri, Mala Singh, Hima Patel, Yogesh S Marfatia, Rasheedunnisa Begum
BACKGROUND: Several studies have reported hyperhomocysteinemia in vitiligo patients, suggesting the potential role of elevated homocysteine levels in precipitating vitiligo. OBJECTIVES: We aimed to estimate homocysteine and vitamin B12 levels, and to investigate the role of MTHFR 677 C > T and 1298 A > C polymorphisms in vitiligo susceptibility in Gujarat population. METHODS: Homocysteine and vitamin B12 levels were estimated in plasma of 55 vitiligo patients and 60 controls by Electrochemiluminescence immunoassay (ECLIA)...
January 30, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29390494/a-possible-synergistic-effect-of-mthfr-c677t-polymorphism-on-homocysteine-level-variations-increased-risk-for-ischemic-stroke
#11
Aifan Li, Yunshu Shi, Liyan Xu, Yuchao Zhang, Huiling Zhao, Qiangmin Li, Xingjuan Zhao, Xinhui Cao, Hong Zheng, Ying He
BACKGROUND: Homocysteine (Hcy) plays an important role in vascular function and Hcy level contributes to pathogenesis of ischemic stroke (IS). MTHFR gene polymorphism may have effects on IS risks by influencing the Hcy metabolic pathway. In the present study, a case-control study was designed to evaluate the relationship among MTHFR C677Tpolymorphism, plasma Hcy level, and susceptibility of IS in Chinese population. METHODS: A total of 300 patients with IS and 261 matched control subjects were recruited...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29387573/saffron-improved-depression-and-reduced-homocysteine-level-in-patients-with-major-depression-a-randomized-double-blind-study
#12
Gholamali Jelodar, Zahra Javid, Ali Sahraian, Sina Jelodar
Objectives: A correlation between hyperhomocysteinemia, and depression has been reported. Saffron (Crocus sativus) is recommended for treatment of depression; hence, in this study the effect of co-administration of saffron and fluoxetine on plasma homocysteine and depression was evaluated. Material and methods: This was a 4-week randomized and double-blind clinical trial which was conducted from March 2013 to February 2014. In this trial, 40 male and females (20-55 years old) diagnosed with severe depression were selected and following filing the Beck form, were randomly divided into two groups...
January 2018: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/29384828/evaluation-of-vitamin-b12-deficiency-and-associated-factors-in-patients-with-systemic-sclerosis
#13
Diler Tas Kilic, Ali Akdogan, Levent Kilic, Alper Sari, Abdulsamet Erden, Berkan Armagan, Muhammed Kilickaya, Umut Kalyoncu, Turan Turhan, Sedat Kiraz, Selma Karaahmetoglu
BACKGROUND/OBJECTIVE: In patients with systemic sclerosis (SSc) gastrointestinal (GI) involvement, nutritional status and medications may lead to cobalamin (Vit B12) deficiency. We aimed to determine the frequency and the potential causes of Vit B12 deficiency in SSc patients. METHODS: We conducted a cross-sectional analysis of 62 SSc patients in a single center in 1 year period. Medical history and physical examination of patients were reevaluated. Data about organ involvements were obtained from hospital file records...
January 30, 2018: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/29384421/relation-of-serum-levels-of-homocysteine-vitamin-b12-and-folate-to-cognitive-functions-in-multiple-sclerosis-patients
#14
Ebtesam Mohamed Fahmy, Nervana Mohamed Elfayoumy, Ahmed Mohamed Abdelalim, Sahar Abdel-Aaty Sharaf, Rania Shehata Ismail, Haidy Elshebawy
BACKGROUND: Hyperhomocysteinemia, vitamin B12 and folate deficiency have been linked to cognitive dysfunction in multiple sclerosis (MS) patients. OBJECTIVE: This study aimed to investigate the relation of serum homocysteine (Hcy), vitamin B12 and folate to cognitive functions in MS patients. SUBJECTS AND METHODS: Forty-five MS patients and twenty matched healthy controls were included. Subjects were submitted to cognitive assessment using a selected psychometric battery and measurement of serum levels of homocysteine, B12 and folic acid...
January 31, 2018: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29379943/efficacy-of-oral-mixed-tocotrienols-in-diabetic-peripheral-neuropathy-a-randomized-clinical-trial
#15
Chee Peng Hor, Wai Yee Fung, Hock Aun Ang, Sheau Chin Lim, Li Ying Kam, Su-Way Sim, Luen Hui Lim, Wai Yee Choon, Jia Woei Wong, Alan Swee Hock Ch'ng, Kelvin Khai Meng Beh, Hong Chin Wee, Loke Meng Ong, Nurzalina Abdul Karim Khan, Syed Azhar Syed Sulaiman, Ibrahim Lutfi Shuaib, Adlina Bakar, Yusnita Yusof, Yusmawati Mohd Yusof, Fatimah Abu Bakar, Wei Shuong Tang, Hoon Lang Teh, Normala Abdul Wahid, Suriani Saaidin, Najihah Idris, Chee Kin Yoon, Hoon Ngoh Ong, Jayasumithra T Ganapathy, Ching Ee Loo, Michelle M Samy, Hadzlinda Zainal, Shalini C Sree Dharan, Bee Yen Ooi, Pei Yeing Teoh, Yi Loon Tye, Chin Aun Yeoh, Dy Win Low, Irene Looi, Kah Hay Yuen
Importance: Management of painful diabetic peripheral neuropathy remains challenging. Most therapies provide symptomatic relief with varying degrees of efficacy. Tocotrienols have modulatory effects on the neuropathy pathway and may reduce neuropathic symptoms with their antioxidative and anti-inflammatory activities. Objective: To evaluate the efficacy of oral mixed tocotrienols for patients with diabetic peripheral neuropathy. Design, Setting, and Participants: The Vitamin E in Neuroprotection Study (VENUS) was a parallel, double-blind, placebo-controlled trial that recruited participants from January 30, 2011, to December 7, 2014, with 12 months of follow-up...
January 29, 2018: JAMA Neurology
https://www.readbyqxmd.com/read/29372262/vascular-endothelium-dysfunction-a-conservative-target-in-metabolic-disorders
#16
REVIEW
Shalini Jamwal, Saurabh Sharma
AIM: Vascular endothelium plays a role in capillary transport of nutrients and drugs and regulates angiogenesis, homeostasis, as well as vascular tone and permeability as a major regulator of local vascular homeostasis. The present study has been designed to investigate the role of endothelium in metabolic disorders. METHODS: The endothelium maintains the balance between vasodilatation and vasoconstriction, procoagulant and anticoagulant, prothrombotic and antithrombotic mechanisms...
January 25, 2018: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29370361/hyperhomocysteinemia-and-risk-of-first-venous-thrombosis-the-influence-of-unmeasured-confounding-factors
#17
Monica Ospina-Romero, Suzanne C Cannegieter, Martin den Heijer, Carine J M Doggen, Frits R Rosendaal, Willem M Lijfering
Meta-analyses have reported a 2-3 fold increased risk of venous thrombosis (VT) in individuals with hyperhomocysteinemia, however, confounding factors were generally not considered. In contrast, randomized trials of homocysteine-lowering therapy and VT risk were negative. We investigated if hyperhomocysteinemia is associated with VT in the MEGA case-control study (1999-2004) from the Netherlands (1,689 cases and 1,726 controls), taking into account measured and unmeasured confounders. We compared patients with population controls to estimate odds ratios (OR) by unconditional logistic regression and adjusted for various potential confounders...
January 12, 2018: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29365652/hyperhomocysteinemia-induced-by-methionine-nutritional-overload-more-promptly-affects-brain-than-heart-cholinergic-system-without-affects-on-food-intake-and-body-mass-gain
#18
Dragan Hrncic, Aleksandra Rasic-Markovic, Mirjana Colovic, Danijela Krstic, Nikola Sutulovic, Zeljko Grubac, Veselinka Susic, Dragan Djuric, Olivera Stanojlovic
No abstract text is available yet for this article.
August 2017: Atherosclerosis
https://www.readbyqxmd.com/read/29358636/association-between-h-type-hypertension-and-asymptomatic-extracranial-artery-stenosis
#19
Jia Zhang, Yanfang Liu, Anxin Wang, Dandan Wang, Ruixuan Jiang, Jiaokun Jia, Shengyun Chen, Xingquan Zhao
Asymptomatic extracranial artery stenosis (ECAS) is a well-known risk factor for stroke and H-type hypertension, which is defined as hypertension with hyperhomocysteinemia, is associated with cardio-cerebrovascular diseases. However, the impact of H-type hypertension on ECAS is mostly unknown. We designed this study to investigate the association between H-type hypertension and prevalence of ECAS. We included 2330 participants in this study and classified them into four groups: the control group without hypertension or hyperhomocysteinemia, isolated hypertension group, isolated hyperhomocysteinemia group and H-type hypertension group...
January 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29338755/hyperhomocysteinemia-in-bilateral-anterior-ischemic-optic-neuropathy-after-conventional-coronary-artery-bypass-graft-a-case-report
#20
A Niro, G Sborgia, A Sborgia, G Alessio
BACKGROUND: The incidence of anterior ischemic optic neuropathy after coronary artery bypass graft procedures ranges from 1.3 to 0.25%. The mechanisms of anterior ischemic optic neuropathy after cardiovascular procedures remain undefined but many systemic and related-to-surgery risk factors could underlie anterior ischemic optic neuropathy. In this case, we report a rare presentation of a bilateral anterior ischemic optic neuropathy after coronary artery bypass graft and speculate on the preoperative hyperhomocysteinemia as an independent risk factor for anterior ischemic optic neuropathy...
January 17, 2018: Journal of Medical Case Reports
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