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Giroud M, Kuhn B, Haap W. Drug Discovery Efforts to Identify Novel Treatments for Neglected Tropical Diseases - Cysteine Protease Inhibitors. Curr Med Chem 2024; 31:2170-2194. [PMID: 37916489 DOI: 10.2174/0109298673249097231017051733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 06/19/2023] [Accepted: 09/14/2023] [Indexed: 11/03/2023]
Abstract
BACKGROUND Neglected tropical diseases are a severe burden for mankind, affecting an increasing number of people around the globe. Many of those diseases are caused by protozoan parasites in which cysteine proteases play a key role in the parasite's pathogenesis. OBJECTIVE In this review article, we summarize the drug discovery efforts of the research community from 2017 - 2022 with a special focus on the optimization of small molecule cysteine protease inhibitors in terms of selectivity profiles or drug-like properties as well as in vivo studies. The cysteine proteases evaluated by this methodology include Cathepsin B1 from Schistosoma mansoni, papain, cruzain, falcipain, and rhodesain. METHODS Exhaustive literature searches were performed using the keywords "Cysteine Proteases" and "Neglected Tropical Diseases" including the years 2017 - 2022. Overall, approximately 3'000 scientific papers were retrieved, which were filtered using specific keywords enabling the focus on drug discovery efforts. RESULTS AND CONCLUSION Potent and selective cysteine protease inhibitors to treat neglected tropical diseases were identified, which progressed to pharmacokinetic and in vivo efficacy studies. As far as the authors are aware of, none of those inhibitors reached the stage of active clinical development. Either the inhibitor's potency or pharmacokinetic properties or safety profile or a combination thereof prevented further development of the compounds. More efforts with particular emphasis on optimizing pharmacokinetic and safety properties are needed, potentially by collaborations of academic and industrial research groups with complementary expertise. Furthermore, new warheads reacting with the catalytic cysteine should be exploited to advance the research field in order to make a meaningful impact on society.
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Affiliation(s)
- Maude Giroud
- Pharma Research and Early Development pRED, Roche Innovation Center Basel, Medicinal Chemistry, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, Basel, CH-4070, Switzerland
| | - Bernd Kuhn
- Pharma Research and Early Development pRED, Roche Innovation Center Basel, Medicinal Chemistry, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, Basel, CH-4070, Switzerland
| | - Wolfgang Haap
- Pharma Research and Early Development pRED, Roche Innovation Center Basel, Medicinal Chemistry, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, Basel, CH-4070, Switzerland
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2
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Sanchez-Gimenez R, Peiró ÓM, Bonet G, Carrasquer A, Fragkiadakis GA, Bulló M, Papandreou C, Bardaji A. Plasma trimethylamine-N-oxide, its precursors and risk of cardiovascular events in patients with acute coronary syndrome: Mediating effects of renal function. Front Cardiovasc Med 2022; 9:1000815. [PMID: 36211587 PMCID: PMC9532606 DOI: 10.3389/fcvm.2022.1000815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 09/05/2022] [Indexed: 11/25/2022] Open
Abstract
Aims To examine associations of the gut microbial metabolite trimethylamine-N-oxide (TMAO) and its precursors with risk of cardiovascular events in acute coronary syndrome (ACS), and determine whether these associations were mediated by renal function. Methods In this prospective cohort study, we included 309 patients with ACS. During a mean follow-up of 6.7 years, 131 patients developed major adverse cardiovascular events (MACE) (myocardial infarction, hospitalization for heart failure, and all-cause mortality). Plasma concentrations of TMAO, trimethylamine (TMA), choline, betaine, dimethylglycine and L-carnitine were profiled by liquid chromatography tandem mass spectrometry. Hazard ratios were estimated with multivariable Cox regression models. The mediating role of estimated glomerular filtration rate (eGFR) was tested under a counterfactual framework. Results After adjustment for traditional cardiovascular risk factors and medications, participants in the highest tertile vs. the lowest tertile of baseline TMAO and dimethylglycine concentrations had a higher risk of MACE [(HR: 1.83; 95% CI: 1.08, 3.09) and (HR: 2.26; 95% CI: 1.17, 3.99), respectively]. However, with regards to TMAO these associations were no longer significant, whereas for dimethylglycine, the associations were attenuated after additional adjustment for eGFR. eGFR mediated the associations of TMAO (58%) and dimethylglycine (32%) with MACE incidence. The associations between dimethylglycine and incident MACE were confirmed in an internal validation. No significant associations were found for TMA, choline, betaine and L-carnitine. Conclusion These findings suggest that renal function may be a key mediator in the association of plasma TMAO with the development of cardiovascular events after ACS. The present findings also support a role of dimethylglycine in the pathogenesis of MACE, which may be mediated, at least partially, by renal function.
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Affiliation(s)
- Raul Sanchez-Gimenez
- Department of Cardiology, Joan XXIII University Hospital, Tarragona, Spain
- Institut d'Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Department of Medicine and Surgery, Rovira i Virgili University, Tarragona, Spain
| | - Óscar M. Peiró
- Department of Cardiology, Joan XXIII University Hospital, Tarragona, Spain
- Institut d'Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Department of Medicine and Surgery, Rovira i Virgili University, Tarragona, Spain
| | - Gil Bonet
- Department of Cardiology, Joan XXIII University Hospital, Tarragona, Spain
- Institut d'Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Department of Medicine and Surgery, Rovira i Virgili University, Tarragona, Spain
| | - Anna Carrasquer
- Department of Cardiology, Joan XXIII University Hospital, Tarragona, Spain
- Institut d'Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Department of Medicine and Surgery, Rovira i Virgili University, Tarragona, Spain
| | - Georgios A. Fragkiadakis
- Department of Nutrition and Dietetics Sciences, School of Health Sciences, Hellenic Mediterranean University (HMU), Siteia, Greece
| | - Mònica Bulló
- Institut d'Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Department of Biochemistry and Biotechnology, Rovira i Virgili University, Reus, Spain
- Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, Madrid, Spain
| | - Christopher Papandreou
- Institut d'Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- *Correspondence: Christopher Papandreou
| | - Alfredo Bardaji
- Department of Cardiology, Joan XXIII University Hospital, Tarragona, Spain
- Institut d'Investigació Sanitària Pere Virgili (IISPV), Reus, Spain
- Department of Medicine and Surgery, Rovira i Virgili University, Tarragona, Spain
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Ilyas A, Wijayasinghe YS, Khan I, El Samaloty NM, Adnan M, Dar TA, Poddar NK, Singh LR, Sharma H, Khan S. Implications of trimethylamine N-oxide (TMAO) and Betaine in Human Health: Beyond Being Osmoprotective Compounds. Front Mol Biosci 2022; 9:964624. [PMID: 36310589 PMCID: PMC9601739 DOI: 10.3389/fmolb.2022.964624] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
Osmolytes are naturally occurring small molecular weight organic molecules, which are accumulated in large amounts in all life forms to maintain the stability of cellular proteins and hence preserve their functions during adverse environmental conditions. Trimethylamine N-oxide (TMAO) and N,N,N-trimethylglycine (betaine) are methylamine osmolytes that have been extensively studied for their diverse roles in humans and have demonstrated opposing relations with human health. These osmolytes are obtained from food and synthesized endogenously using dietary constituents like choline and carnitine. Especially, gut microbiota plays a vital role in TMAO synthesis and contributes significantly to plasma TMAO levels. The elevated plasma TMAO has been reported to be correlated with the pathogenesis of numerous human diseases, including cardiovascular disease, heart failure, kidney diseases, metabolic syndrome, etc.; Hence, TMAO has been recognized as a novel biomarker for the detection/prediction of several human diseases. In contrast, betaine acts as a methyl donor in one-carbon metabolism, maintains cellular S-adenosylmethionine levels, and protects the cells from the harmful effects of increased plasma homocysteine. Betaine also demonstrates antioxidant and anti-inflammatory activities and has a promising therapeutic value in several human diseases, including homocystinuria and fatty liver disease. The present review examines the multifarious functions of TMAO and betaine with possible molecular mechanisms towards a better understanding of their emerging and diverging functions with probable implications in the prevention, diagnosis, and treatment of human diseases.
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Affiliation(s)
- Ashal Ilyas
- Department of Biotechnology, Invertis University, Bareilly, Uttar Pradesh, India
| | - Yasanandana Supunsiri Wijayasinghe
- Department of Biochemistry and Clinical Chemistry, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka,*Correspondence: Yasanandana Supunsiri Wijayasinghe, , Nitesh Kumar Poddar, , , Shahanavaj Khan,
| | - Ilyas Khan
- Department of Mathematics, College of Science Al-Zulfi, Majmaah University, Al-Majmaah, Saudi Arabia
| | - Nourhan M. El Samaloty
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Pharmacy, Future University in Egypt, Cairo, Egypt
| | - Mohd Adnan
- Department of Biology, College of Science, University of Hail, Hail, Saudi Arabia
| | - Tanveer Ali Dar
- Department of Clinical Biochemistry, University of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Nitesh Kumar Poddar
- Department of Biosciences, Manipal University Jaipur, Jaipur, Rajasthan, India,*Correspondence: Yasanandana Supunsiri Wijayasinghe, , Nitesh Kumar Poddar, , , Shahanavaj Khan,
| | - Laishram R. Singh
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Hemlata Sharma
- Department of Biosciences, Manipal University Jaipur, Jaipur, Rajasthan, India
| | - Shahanavaj Khan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia,Department of Medical Lab Technology, Indian Institute of Health and Technology (IIHT), Saharanpur, Uttar Pradesh, India,*Correspondence: Yasanandana Supunsiri Wijayasinghe, , Nitesh Kumar Poddar, , , Shahanavaj Khan,
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Association and Interaction Effect of BHMT Gene Polymorphisms and Maternal Dietary Habits with Ventricular Septal Defect in Offspring. Nutrients 2022; 14:nu14153094. [PMID: 35956270 PMCID: PMC9370527 DOI: 10.3390/nu14153094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/18/2022] [Accepted: 07/25/2022] [Indexed: 02/07/2023] Open
Abstract
This study attempted to learn the association between maternal betaine-homocysteine methyltransferase (BHMT) gene polymorphisms, maternal dietary habits, and their interactions with the risk of ventricular septal defects (VSD) in offspring. A total of 426 mothers of VSD children and 740 control mothers were included in the study. Logistic regression was used to evaluate the level of associations and interaction effects. Our study suggested that mothers reporting excessive intake of smoked foods (aOR = 2.44, 95%CI: 1.89–3.13), barbecued foods (aOR = 1.86, 95%CI: 1.39–2.48), fried foods (aOR = 1.93, 95%CI: 1.51–2.46), and pickled vegetables (aOR = 2.50, 95%CI: 1.92–3.25) were at a significantly higher risk of VSD in offspring, instead, mothers reporting regular intake of fresh fruits (aOR = 0.47, 95%CI: 0.36–0.62), fish and shrimp (aOR = 0.35, 95%CI: 0.28–0.44), fresh eggs, (aOR = 0.56, 95%CI: 0.45–0.71), beans (aOR = 0.68, 95%CI: 0.56–0.83), and milk products (aOR = 0.67, 95%CI: 0.56–0.80) were at a lower risk of VSD in offspring. In addition, maternal BHMT gene polymorphisms at rs1316753 (CG vs. CC: aOR = 2.01, 95%CI: 1.43–2.83) and rs1915706 (CT vs. TT: (aOR = 1.81, 95%CI: 1.33–2.46) were significantly associated with increased risk of VSD in offspring. Furthermore, a significant interaction between BHMT polymorphisms and maternal bean intake was identified in the study. In conclusion, Maternal BHMT polymorphisms at rs1316753 and rs1915706, dietary habits as well as their interaction were observed to be significantly associated with the risk of VSD in offspring.
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Conan P, Léon A, Gourdel M, Rollet C, Chaïr L, Caroff N, Le Goux N, Le Jossic-Corcos C, Sinane M, Gentile L, Maillebouis L, Loaëc N, Martin J, Vilaire M, Corcos L, Mignen O, Croyal M, Voisset C, Bihel F, Friocourt G. Identification of 8-Hydroxyquinoline Derivatives That Decrease Cystathionine Beta Synthase (CBS) Activity. Int J Mol Sci 2022; 23:ijms23126769. [PMID: 35743210 PMCID: PMC9223588 DOI: 10.3390/ijms23126769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/09/2022] [Accepted: 06/16/2022] [Indexed: 12/04/2022] Open
Abstract
CBS encodes a pyridoxal 5′-phosphate-dependent enzyme that catalyses the condensation of homocysteine and serine to form cystathionine. Due to its implication in some cancers and in the cognitive pathophysiology of Down syndrome, the identification of pharmacological inhibitors of this enzyme is urgently required. However, thus far, attempts to identify such molecules have only led to the identification of compounds with low potency and limited selectivity. We consequently developed an original, yeast-based screening method that identified three FDA-approved drugs of the 8-hydroxyquinoline family: clioquinol, chloroxine and nitroxoline. These molecules reduce CBS enzymatic activity in different cellular models, proving that the molecular mechanisms involved in yeast phenotypic rescue are conserved in mammalian cells. A combination of genetic and chemical biology approaches also revealed the importance of copper and zinc intracellular levels in the regulation of CBS enzymatic activity—copper promoting CBS activity and zinc inhibiting its activity. Taken together, these results indicate that our effective screening approach identified three new potent CBS inhibitors and provides new findings for the regulation of CBS activity, which is crucial to develop new therapies for CBS-related human disorders.
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Affiliation(s)
- Pierre Conan
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Alice Léon
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Mathilde Gourdel
- Inserm, Université de Nantes, CHU Nantes, CNRS, L’Institut Du Thorax, 44000 Nantes, France; (M.G.); (M.C.)
- CRNH-Ouest Mass Spectrometry Core Facility, 44000 Nantes, France
| | - Claire Rollet
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Loubna Chaïr
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Noéline Caroff
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Nelig Le Goux
- Inserm U1227, Lymphocytes B, Autoimmunité et Immunothérapies, Université de Brest, 29200 Brest, France; (N.L.G.); (O.M.)
| | - Catherine Le Jossic-Corcos
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Maha Sinane
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Lucile Gentile
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Louise Maillebouis
- CRB-Biojel, Institut Jérôme Lejeune, 75015 Paris, France; (L.M.); (M.V.)
| | - Nadège Loaëc
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Jennifer Martin
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Marie Vilaire
- CRB-Biojel, Institut Jérôme Lejeune, 75015 Paris, France; (L.M.); (M.V.)
| | - Laurent Corcos
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Olivier Mignen
- Inserm U1227, Lymphocytes B, Autoimmunité et Immunothérapies, Université de Brest, 29200 Brest, France; (N.L.G.); (O.M.)
| | - Mikael Croyal
- Inserm, Université de Nantes, CHU Nantes, CNRS, L’Institut Du Thorax, 44000 Nantes, France; (M.G.); (M.C.)
- CRNH-Ouest Mass Spectrometry Core Facility, 44000 Nantes, France
- Inserm, Université de Nantes, CHU Nantes, CNRS, SFR Santé, Inserm UMS 016, CNRS UMS 3556, 44000 Nantes, France
| | - Cécile Voisset
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
| | - Frédéric Bihel
- Laboratoire d’Innovation Thérapeutique, LIT, UMR7200, IMS MEDALIS, Faculty of Pharmacy, CNRS, Université de Strasbourg, 67400 Illkirch, France;
| | - Gaëlle Friocourt
- Inserm, Université de Brest, EFS, UMR 1078, GGB, 29200 Brest, France; (P.C.); (A.L.); (C.R.); (L.C.); (N.C.); (C.L.J.-C.); (M.S.); (L.G.); (N.L.); (J.M.); (L.C.); (C.V.)
- Correspondence: ; Tel.: +33-(0)2-98-01-83-87
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Matsui S, Hiraishi C, Sato R, Kojima T, Ando K, Fujimoto K, Yoshida H. Associations of Homocysteine with B Vitamins and Zinc in Serum Levels of Patients with Type 2 Diabetes Mellitus: A Cross-Sectional Study. J Nutr Sci Vitaminol (Tokyo) 2022; 67:417-423. [PMID: 34980720 DOI: 10.3177/jnsv.67.417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The association of homocysteine metabolism-related nutrients along with renal function to homocysteine levels is not well known in patients with type 2 diabetes mellitus (T2DM). We investigated the relevance of kidney function, albuminuria, and nutritional factors to serum homocysteine in T2DM patients. This cross-sectional study enrolled 149 T2DM patients (96 men and 53 postmenopausal women), and patient characteristics and laboratory data including kidney-related data [glomerular filtration rate (eGFR), urinary albumin excretion (UACR), uric acid] and metabolism parameters (hemoglobin A1c and lipids) were collected from the medical record and serum levels of vitamin B12, folic acid, zinc, homocysteine and UACR were also acquired. In total subjects, serum levels of homocysteine, vitamin B12, and folic acid were within reference intervals, but zinc levels were close to lower limits of its reference interval. A multivariate-adjusted analysis showed that gender (β=-0.259, p<0.001), uric acid (β=0.267, p<0.001), eGFR (β=-0.188, p=0.001), log UACR (β=0.190, p=0.002), log folic acid (β=-0.259, p<0.001), log vitamin B12 (β=-0.224, p<0.001) and zinc (β=-0.169, p=0.006) were correlated to log homocysteine. In multiple regression analysis by gender, these correlations were found similarly in men, but neither log folic acid nor zinc showed correlations with log homocysteine in women. The present study suggests that renal function parameters and the certain nutritional factors have a possible influence on serum homocysteine, in T2DM patients including diabetes kidney disease.
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Affiliation(s)
- Sadako Matsui
- Food and Nutrition, Faculty of Human Sciences and Design, Japan Women's University
| | - Chika Hiraishi
- Section of Internal Medicine of Metabolism and Nutrition, The Jikei University Graduate School of Medicine
| | - Ryo Sato
- Department of Laboratory Medicine, The Jikei University Kashiwa Hospital
| | - Takai Kojima
- Department of Laboratory Medicine, The Jikei University Kashiwa Hospital
| | - Kiyotaka Ando
- Division of Diabetes, Metabolism and Endocrinology, The Jikei University Kashiwa Hospital
| | - Kei Fujimoto
- Division of Diabetes, Metabolism and Endocrinology, The Jikei University Daisan Hospital
| | - Hiroshi Yoshida
- Section of Internal Medicine of Metabolism and Nutrition, The Jikei University Graduate School of Medicine.,Department of Laboratory Medicine, The Jikei University Kashiwa Hospital
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Zarezadeh M, Faghfouri AH, Aghapour B, Rostamkhani H, Malekahmadi M, Naemi Kermanshahi M, Ostadrahimi A. Investigation of the clinical efficacy of Zn supplementation in improvement of oxidative stress parameters: A systematic review and dose-response meta-analysis of controlled clinical trials. Int J Clin Pract 2021; 75:e14777. [PMID: 34510667 DOI: 10.1111/ijcp.14777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 08/30/2021] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND/OBJECTIVES Clinical efficacy of zinc (Zn) supplementation in the improvement of oxidative stress biomarkers has been investigated in some clinical trial studies. The purpose of the current dose-response meta-analysis is to systematically aggregate and evaluate all related studies to highlight the possible effect of Zn supplementation on oxidative stress. METHODS Systematic search was performed on Scopus, PubMed/Medline, Web of Science and Embase up to 31 December 2020. The random effect method was used to perform pooled analysis. Possible sources of heterogeneity were found using subgroup analysis and meta-regression. In the presence of publication bias, trim and fill analysis was performed to adjust the results. Non-linear relationship between effect size and variables was investigated by performing dose-response analysis. The quality of included studies was assessed using Cochrane Collaboration's tool. RESULTS Pooled-analysis of 18 studies showed that Zn supplementation improved MDA and Hcys levels (SMD = -1.53 μmol/L; 95% CI: -2.22, -0.85; P < .001 and SMD = -0.62 μmol/L; 95% CI: -1.08, -0.15; P < .001, respectively). There was no significant effect of Zn supplementation on TBARS (SMD = -0.59 μmol/l; 95% CI: -1.31, 0.13; P = .108). Zn had maximum reducing effect on MDA in <40 mg/day dosage. CONCLUSION Zn supplementation reduces MDA and Hcys levels, but not TBARS level. Supplementation with Zn <40 mg/day has an optimum effect on MDA level. Zn supplementation could be considered clinically as a beneficial approach in amending oxidative stress.
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Affiliation(s)
- Meysam Zarezadeh
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
- Nutrition Research Center, Department of Clinical Nutrition, Student Research Committee, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amir Hossein Faghfouri
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Community Nutrition, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Baharak Aghapour
- Department of Community Nutrition, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Helya Rostamkhani
- Nutrition Research Center, Department of Clinical Nutrition, Student Research Committee, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahsa Malekahmadi
- Research Center for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Naemi Kermanshahi
- Nutrition Research Center, Department of Clinical Nutrition, Student Research Committee, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Ostadrahimi
- Nutrition Research Center, Department of Clinical Nutrition, Student Research Committee, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
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Weston WC, Hales KH, Hales DB. Flaxseed Increases Animal Lifespan and Reduces Ovarian Cancer Severity by Toxically Augmenting One-Carbon Metabolism. Molecules 2021; 26:5674. [PMID: 34577143 PMCID: PMC8471351 DOI: 10.3390/molecules26185674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 09/11/2021] [Accepted: 09/12/2021] [Indexed: 01/06/2023] Open
Abstract
We used an LC-MS/MS metabolomics approach to investigate one-carbon metabolism in the plasma of flaxseed-fed White Leghorn laying hens (aged 3.5 years). In our study, dietary flaxseed (via the activity of a vitamin B6 antagonist known as "1-amino d-proline") induced at least 15-fold elevated plasma cystathionine. Surprisingly, plasma homocysteine (Hcy) was stable in flaxseed-fed hens despite such highly elevated cystathionine. To explain stable Hcy, our data suggest accelerated Hcy remethylation via BHMT and MS-B12. Also supporting accelerated Hcy remethylation, we observed elevated S-adenosylmethionine (SAM), an elevated SAM:SAH ratio, and elevated methylthioadenosine (MTA), in flaxseed-fed hens. These results suggest that flaxseed increases SAM biosynthesis and possibly increases polyamine biosynthesis. The following endpoint phenotypes were observed in hens consuming flaxseed: decreased physiological aging, increased empirical lifespan, 9-14% reduced body mass, and improved liver function. Overall, we suggest that flaxseed can protect women from ovarian tumor metastasis by decreasing omental adiposity. We also propose that flaxseed protects cancer patients from cancer-associated cachexia by enhancing liver function.
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Affiliation(s)
- William C. Weston
- Department of Molecular, Cellular & Systemic Physiology, School of Medicine, Southern Illinois University, Carbondale, IL 62901, USA;
| | - Karen H. Hales
- Department of Obstetrics & Gynecology, School of Medicine, Southern Illinois University, Carbondale, IL 62901, USA;
| | - Dale B. Hales
- Department of Molecular, Cellular & Systemic Physiology, School of Medicine, Southern Illinois University, Carbondale, IL 62901, USA;
- Department of Obstetrics & Gynecology, School of Medicine, Southern Illinois University, Carbondale, IL 62901, USA;
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9
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Mendes CC, Zampieri BL, Arantes LMRB, Melendez ME, Biselli JM, Carvalho AL, Eberlin MN, Riccio MF, Vannucchi H, Carvalho VM, Goloni-Bertollo EM, Pavarino ÉC. One-carbon metabolism and global DNA methylation in mothers of individuals with Down syndrome. Hum Cell 2021; 34:1671-1681. [PMID: 34410622 DOI: 10.1007/s13577-021-00586-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 07/26/2021] [Indexed: 10/20/2022]
Abstract
Down syndrome (DS) is the most common chromosomal disorder, resulting from the failure of normal chromosome 21 segregation. Studies have suggested that impairments within the one-carbon metabolic pathway can be of relevance for the global genome instability observed in mothers of individuals with DS. Based on the association between global DNA hypomethylation, genome instability, and impairments within the one-carbon metabolic pathway, the present study aimed to identify possible predictors, within the one-carbon metabolism, of global DNA methylation, measured by methylation patterns of LINE-1 and Alu repetitive sequences, in mothers of individuals with DS and mothers of individuals without the syndrome. In addition, we investigated one-carbon genetic polymorphisms and metabolites as maternal predisposing factors for the occurrence of trisomy 21 in children. Eighty-three samples of mothers of children with DS with karyotypically confirmed free trisomy 21 (case group) and 84 of mothers who had at least one child without DS or any other aneuploidy were included in the study. Pyrosequencing assays were performed to access global methylation. The results showed that group affiliation (case or control), betaine-homocysteine methyltransferase (BHMT) G742A and transcobalamin 2 (TCN2) C776G polymorphisms, and folate concentration were identified as predictors of global Alu DNA methylation values. In addition, thymidylate synthase (TYMS) 28-bp repeats 2R/3R or 3R/3R genotypes are independent maternal predisposing factors for having a child with DS. This study adds evidence that supports the association of impairments in the one-carbon metabolism, global DNA methylation, and the possibility of having a child with DS.
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Affiliation(s)
- Cristiani Cortez Mendes
- Unidade de Pesquisa em Genética e Biologia Molecular-UPGEM, Departamento de Biologia Molecular, Faculdade de Medicina de São José do Rio Preto-FAMERP, São José do Rio Preto, São Paulo, Brazil
| | | | | | - Matias Eliseo Melendez
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
| | - Joice Matos Biselli
- Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Biociências, Letras e Ciências Exatas de São José do Rio Preto, Departamento de Ciências Biológicas, São José do Rio Preto, São Paulo, Brazil
| | - André Lopes Carvalho
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
| | - Marcos Nogueira Eberlin
- Universidade Presbiteriana Mackenzie, Discovery-Mackenzie-Núcleo Mackenzie de Pesquisa, Núcleo Mackenzie de Pesquisas em Ciência, Fé e Sociedade, São Paulo, São Paulo, Brazil
| | | | - Hélio Vannucchi
- Laboratório de Nutrição, Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto-USP, Ribeirão Preto, São Paulo, Brazil
| | | | - Eny Maria Goloni-Bertollo
- Unidade de Pesquisa em Genética e Biologia Molecular-UPGEM, Departamento de Biologia Molecular, Faculdade de Medicina de São José do Rio Preto-FAMERP, São José do Rio Preto, São Paulo, Brazil
| | - Érika Cristina Pavarino
- Unidade de Pesquisa em Genética e Biologia Molecular-UPGEM, Departamento de Biologia Molecular, Faculdade de Medicina de São José do Rio Preto-FAMERP, São José do Rio Preto, São Paulo, Brazil.
- , Av. Brigadeiro Faria Lima, 5416, Vila São Pedro, São José do Rio Preto, São Paulo, 15090-000, Brazil.
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10
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Soler-Blasco R, Murcia M, Lozano M, Sarzo B, Esplugues A, Vioque J, Lertxundi N, Marina LS, Lertxundi A, Irizar A, Braeuer S, Goesler W, Ballester F, Llop S. Urinary arsenic species and methylation efficiency during pregnancy: Concentrations and associated factors in Spanish pregnant women. ENVIRONMENTAL RESEARCH 2021; 196:110889. [PMID: 33607098 DOI: 10.1016/j.envres.2021.110889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 02/02/2021] [Accepted: 02/11/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Arsenic (As) is considered to be toxic for humans, the main routes of exposure being through drinking water and the diet. Once ingested, inorganic arsenic can be methylated sequentially to monomethyl and dimethyl arsenicals. Several factors can affect both As exposure and methylation efficiency. OBJECTIVES To describe the urinary concentrations of the different As species and evaluate the methylation efficiency during pregnancy, as well as their associated factors in a birth cohort of pregnant Spanish women. METHODS Participants in this cross-sectional study were 1017 pregnant women from two areas of Spain who had taken part in the INMA (Environment and Childhood) project (2003-2008). Total As (organic and inorganic compounds) and its main metabolites (monomethylarsonic acid, [MMA], dimethylarsinic acid, [DMA], inorganic As [iAs]) and arsenobetaine [AB]) were measured in urine samples collected during the first trimester. Sociodemographic and dietary information was collected through questionnaires. Multivariate linear regression models were used to explore the association between As species concentrations and covariates. Arsenic methylation efficiency was determined through the percentages of the metabolites and using As methylation phenotypes, obtained from principal component analysis. RESULTS Median urine concentrations were 33.0, 21.6, 6.5, 0.35 and 0.33 μg/g creatinine for total As, AB, DMA, MMA and iAs, respectively. Daily consumption of rice and seafood during the first trimester of pregnancy were positively associated with the concentration of As species (i.e., β [CI95%] = 0.36 [0.09, 0.64] for rice and iAs, and 1.06 [0.68, 1.44] for seafood and AB). TAs, AB and iAs concentrations, and DMA and MMA concentrations were associated with legume and vegetable consumption, respectively. The medians of the percentage of As metabolites were 89.7 for %DMA, 5.1 for %MMA and 4.7 for %iAs. Non-smoker women and those with higher body mass index presented a higher methylation efficiency (denoted by a higher %DMA and lower %MMA). DISCUSSION Certain dietary, lifestyle, and environmental factors were observed to have an influence on both As species concentrations and methylation efficiency in our population. Further birth cohort studies in low exposure areas are necessary to improve knowledge about arsenic exposure, especially to inorganic forms, and its potential health impact during childhood.
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Affiliation(s)
- Raquel Soler-Blasco
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain
| | - Mario Murcia
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain; Health Information Systems Analysis Service, Conselleria de Sanitat, Generalitat Valenciana, Valencia, Spain
| | - Manuel Lozano
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain; Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine Department, Universitat de València, Valencia, Spain
| | - Blanca Sarzo
- Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, FISABIO-Public Health, Valencia, Spain
| | - Ana Esplugues
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain; Department of Nursing, Universitat de València, Valencia, Spain
| | - Jesús Vioque
- Alicante Institute for Health and Biomedical Research, ISABIAL-UMH, 03010, Alicante, Spain
| | - Nerea Lertxundi
- Biodonostia Health Research Institute, San Sebastian, Spain; Faculty of Psychology of the University of the Basque Country, UPV/ EHU, San Sebastian, Spain
| | - Loreto Santa Marina
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain; Biodonostia Health Research Institute, San Sebastian, Spain; Public Health Division of Gipuzkoa, Basque Government, San Sebastian, Spain
| | - Aitana Lertxundi
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain; Biodonostia Health Research Institute, San Sebastian, Spain; Department of Preventive Medicine and Public Health of the University of the Basque Country, UPV/EHU, Leioa, Spain
| | - Amaia Irizar
- Biodonostia Health Research Institute, San Sebastian, Spain; Department of Preventive Medicine and Public Health of the University of the Basque Country, UPV/EHU, Leioa, Spain.
| | - Simone Braeuer
- Institute of Chemistry, University of Graz, Graz, Austria
| | - Walter Goesler
- Institute of Chemistry, University of Graz, Graz, Austria
| | - Ferran Ballester
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain; Department of Nursing, Universitat de València, Valencia, Spain
| | - Sabrina Llop
- Epidemiology and Environmental Health Joint Research Unit, FISABIO-Universitat Jaume I-Universitat de València, Valencia, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Madrid, Spain
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11
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Popadić D, Mhaindarkar D, Dang Thai MHN, Hailes HC, Mordhorst S, Andexer JN. A bicyclic S-adenosylmethionine regeneration system applicable with different nucleosides or nucleotides as cofactor building blocks. RSC Chem Biol 2021; 2:883-891. [PMID: 34179784 PMCID: PMC8190896 DOI: 10.1039/d1cb00033k] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 03/22/2021] [Indexed: 12/11/2022] Open
Abstract
The ubiquitous cofactor S-adenosyl-l-methionine (SAM) is part of numerous biochemical reactions in metabolism, epigenetics, and cancer development. As methylation usually improves physiochemical properties of compounds relevant for pharmaceutical use, the sustainable use of SAM as a methyl donor in biotechnological applications is an important goal. SAM-dependent methyltransferases are consequently an emerging biocatalytic tool for environmentally friendly and selective alkylations. However, SAM shows undesirable characteristics such as degradation under mild conditions and its stoichiometric use is economically not reasonable. Here, we report an optimised biomimetic system for the regeneration of SAM and SAM analogues consisting of effective nucleoside triphosphate formation and an additional l-methionine regeneration cycle without by-product accumulation. The bicyclic system uses seven enzymes, S-methylmethionine as methyl donor and a surplus of inorganic polyphosphate, along with catalytic amounts of l-methionine and cofactor building block reaching conversions of up to 99% (up to 200 turnovers). We also show that the cycle can be run with cofactor building blocks containing different purine and pyrimidine nucleobases, which can be fed in at the nucleoside or nucleotide stage. These alternative cofactors are in turn converted to the corresponding SAM analogues, which are considered to be a key for the development of bioorthogonal systems. In addition to purified enzymes, the bicyclic system can also be used with crude lysates highlighting its broad biocatalytic applicability.
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Affiliation(s)
- Désirée Popadić
- Institute of Pharmaceutical Sciences, University of Freiburg Albertstr. 25 79104 Freiburg Germany
| | - Dipali Mhaindarkar
- Institute of Pharmaceutical Sciences, University of Freiburg Albertstr. 25 79104 Freiburg Germany
| | - Mike H N Dang Thai
- Institute of Pharmaceutical Sciences, University of Freiburg Albertstr. 25 79104 Freiburg Germany
| | - Helen C Hailes
- Department of Chemistry, University College London 20 Gordon Street London WC1H 0AJ UK
| | - Silja Mordhorst
- Institute of Pharmaceutical Sciences, University of Freiburg Albertstr. 25 79104 Freiburg Germany
| | - Jennifer N Andexer
- Institute of Pharmaceutical Sciences, University of Freiburg Albertstr. 25 79104 Freiburg Germany
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12
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Indika NLR, Deutz NEP, Engelen MPKJ, Peiris H, Wijetunge S, Perera R. Sulfur amino acid metabolism and related metabotypes of autism spectrum disorder: A review of biochemical evidence for a hypothesis. Biochimie 2021; 184:143-157. [PMID: 33675854 DOI: 10.1016/j.biochi.2021.02.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 02/07/2023]
Abstract
There are multiple lines of evidence for an impaired sulfur amino acid (SAA) metabolism in autism spectrum disorder (ASD). For instance, the concentrations of methionine, cysteine and S-adenosylmethionine (SAM) in body fluids of individuals with ASD is significantly lower while the concentration of S-adenosylhomocysteine (SAH) is significantly higher as compared to healthy individuals. Reduced methionine and SAM may reflect impaired remethylation pathway whereas increased SAH may reflect reduced S-adenosylhomocysteine hydrolase activity in the catabolic direction. Reduced SAM/SAH ratio reflects an impaired methylation capacity. We hypothesize multiple mechanisms to explain how the interplay of oxidative stress, neuroinflammation, mercury exposure, maternal use of valproate, altered gut microbiome and certain genetic variants may lead to these SAA metabotypes. Furthermore, we also propose a number of mechanisms to explain the metabolic consequences of abnormal SAA metabotypes. For instance in the brain, reduced SAM/SAH ratio will result in melatonin deficiency and hypomethylation of a number of biomolecules such as DNA, RNA and histones. In addition to previously proposed mechanisms, we propose that impaired activity of "radical SAM" enzymes will result in reduced endogenous lipoic acid synthesis, reduced molybdenum cofactor synthesis and impaired porphyrin metabolism leading to mitochondrial dysfunction, porphyrinuria and impaired sulfation capacity. Furthermore depletion of SAM may also lead to the disturbed mTOR signaling pathway in a subgroup of ASD. The proposed "SAM-depletion hypothesis" is an inclusive model to explain the relationship between heterogeneous risk factors and metabotypes observed in a subset of children with ASD.
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Affiliation(s)
- Neluwa-Liyanage R Indika
- Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.
| | - Nicolaas E P Deutz
- Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
| | - Marielle P K J Engelen
- Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
| | - Hemantha Peiris
- Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Swarna Wijetunge
- Child and Adolescent Mental Health Service, Lady Ridgeway Hospital for Children, Colombo 8, Sri Lanka
| | - Rasika Perera
- Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
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13
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Abd El-Azim AO. The Effects of B-Vitamins, Dietary Bioactive Agents and Functional Foods on Hyperhomocysteinemia. NUTRITIONAL MANAGEMENT AND METABOLIC ASPECTS OF HYPERHOMOCYSTEINEMIA 2021:225-241. [DOI: 10.1007/978-3-030-57839-8_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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14
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Chen M, Zeng L, Luo X, Mehboob MZ, Ao T, Lang M. Identification and functional characterization of a novel selenocysteine methyltransferase from Brassica juncea L. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:6401-6416. [PMID: 31504785 DOI: 10.1093/jxb/erz390] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 09/09/2019] [Indexed: 05/13/2023]
Abstract
Organic selenium (Se), specifically Se-methylselenocysteine (MeSeCys), has demonstrated potential effects in human disease prevention including cancer and the emerging ameliorating effect on Alzheimer's disease. In plants, selenocysteine methyltransferase (SMT) is the key enzyme responsible for MeSeCys formation. In this study, we first isolated a novel SMT gene, designated as BjSMT, from the genome of a known Se accumulator, Brassica juncea L. BjSMT shows high sequence (amino acid) similarity with its orthologues from Brassica napus and Brassica oleracea var. oleracea, which can use homocysteine (HoCys) and selenocysteine (SeCys) as substrates. Similar to its closest homologues, BjSMT also possesses a conserved Thr187 which is involved in transferring a methyl group to HoCys by donating a hydrogen bond, suggesting that BjSMT can methylate both HoCys and SeCys substrates. Using quantitative real-time PCR (qRT-PCR) technology and BjSMT-transformed tobacco (Nicotiana tabacum) plants, we observed how BjSMT responds to selenite [Se(IV)] and selenate [Se(VI)] stress in B. juncea, and how the phenotypes of BjSMT-overexpressing tobacco cultured under selenite stress are affected. BjSMT expression was nearly undetectable in the B. juncea plant without Se exposure, but in the plant leaves it can be rapidly and significantly up-regulated upon a low level of selenite stress, and enormously up-regulated upon selenate treatment. Overexpression of BjSMT in tobacco substantially enhanced tolerance to selenite stress manifested as significantly higher fresh weight, plant height, and chlorophyll content than control plants. In addition, transgenic plants exhibited low glutathione peroxidase activity in response to a lower dose of selenite stress (with a higher dose of selenite stress resulting in a high activity response) compared with the controls. Importantly, the BjSMT-transformed tobacco plants accumulated a high level of Se upon selenite stress, and the plants also had significantly increased MeSeCys production potential in their leaves. This first study of B. juncea SMT demonstrates its potential applications in crop MeSeCys biofortification and phytoremediation of Se pollution.
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Affiliation(s)
- Meng Chen
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Liu Zeng
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Xiangguang Luo
- College of Life Science, Hebei Agricultural University, Baoding, China
| | | | - Tegenbaiyin Ao
- College of Life Science, Hebei Agricultural University, Baoding, China
| | - Minglin Lang
- College of Life Science, Hebei Agricultural University, Baoding, China
- College of Life Science, University of Chinese Academy of Sciences, Beijing, China
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15
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Imani MM, Lopez-Jornet P, López EPF, Ghanbari F, Sadeghi M. Association of Betaine-Homocysteine S-Methyl Transferase (rs3797546 and rs3733890) polymorphisms with non-syndromic cleft lip/palate: A meta-analysis. Int Orthod 2019; 17:643-651. [PMID: 31451344 DOI: 10.1016/j.ortho.2019.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Non-syndromic cleft lip/palate (NSCL/P) has a multifactorial and polygenic aetiology. The role of genetics in its occurrence has not been fully clarified. The present meta-analysis aimed to evaluate the association of betaine-homocysteine S-methyltransferase (BHMT) polymorphisms (rs3797546 and rs3733890) with the risk of NSCL/P. MATERIALS AND METHODS PubMed/Medline, Scopus, Cochrane Library, and Web of Science databases were systematically searched for articles published up until December 2018 with no language restriction. Quality evaluation of each study was performed by the Newcastle-Ottawa Scale (NOS). The crude odds ratio (OR) and 95% confidence interval (CI) were calculated for each study by RevMan 5.3 software, and a funnel plot analysis was performed by the CMA 2.0 software using the Egger's and Begg's tests. RESULTS Review of the four selected studies revealed that the CC genotype of rs3797546 polymorphism significantly increased the risk of NSCL/P. No association was noted between NSCL/P risk and rs3733890 polymorphism except in Chinese (elevated risk of NSCL/P) and Polish (decreased risk of NSCL/P) populations. CONCLUSIONS According to the present meta-analysis, rs3733890 polymorphism does not play a role in susceptibility to NSCL/P; whereas, rs3797546 polymorphism may play a role in susceptibility to NSCL/P. Future studies are required to examine the association between BHMT polymorphisms and the NSCL/P risk in different ethnicities with a larger sample size.
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Affiliation(s)
- Mohammad Moslem Imani
- Department of Orthodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Pia Lopez-Jornet
- Facultad de Medicina y Odontologia Universidad de Murcia, Hospital Morales Meseguer, Clinica Odontologic Adv Marques Velez s/n, 30008 Murcia, Spain
| | - Eduardo Pons-Fuster López
- Insitituto Murciano de Investigación Biomédica, Murcia, Campus de Ciencias de la Salud, Carretera Buenavista s/n, 30120 El Palmar, Murcia, Spain
| | - Fatemeh Ghanbari
- Department of Orthodontics, Dental Branch, Islamic Azad University, Tehran, Iran
| | - Masoud Sadeghi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran; Students Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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16
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Ward DJ, Van de Langemheen H, Koehne E, Kreidenweiss A, Liskamp RMJ. Highly tunable thiosulfonates as a novel class of cysteine protease inhibitors with anti-parasitic activity against Schistosoma mansoni. Bioorg Med Chem 2019; 27:2857-2870. [PMID: 31126821 DOI: 10.1016/j.bmc.2019.05.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/30/2019] [Accepted: 05/09/2019] [Indexed: 11/18/2022]
Abstract
The development of a new class of cysteine protease inhibitors utilising the thiosulfonate moiety as an SH specific electrophile is described. This moiety has been introduced into suitable amino acid derived building blocks, which were incorporated into peptidic sequences leading to very potent i.e. sub micromolar inhibitors of the cysteine protease papain in the same range as the vinyl sulfone based inhibitor K11777. Therefore, their inhibitory effect on Schistosoma mansoni, a human blood parasite, that expresses several cysteine proteases, was evaluated. The homophenylalanine side chain containing compounds 27-30 and especially 36 showed promising activities compared with K11777 and warrant further investigations of these peptidic thiosulfonate inhibitors as new potential anti-parasitic compounds.
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Affiliation(s)
- D J Ward
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
| | - H Van de Langemheen
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
| | - E Koehne
- Institute of Tropical Medicine, University of Tübingen, Wilhelmstrasse 27, D-72074 Tübingen, Germany
| | - A Kreidenweiss
- Institute of Tropical Medicine, University of Tübingen, Wilhelmstrasse 27, D-72074 Tübingen, Germany.
| | - R M J Liskamp
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK.
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17
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Bakhtiyarova YV, Morozov MV, Minnullin RR, Ivshin KA, Yamalieva LN, Galkina IV, Kataeva ON, Galkin VI. The unusual reaction of alkylation of dicarboxylate phosphabetaines in alcohol media. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2018.1547723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Maxim V. Morozov
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russia
| | - Rail R. Minnullin
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russia
| | - Kamil A. Ivshin
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russia
| | - Luiza N. Yamalieva
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russia
| | - Irina V. Galkina
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russia
| | - Olga N. Kataeva
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russia
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Laboratory of Diffraction Research Methods, Kazan, Russia
| | - Vladimir I. Galkin
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russia
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18
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Kitagawa E, Ota Y, Hasegawa M, Nakagawa T, Hayakawa T. Accumulation of Liver Lipids Induced by Vitamin B 6 Deficiency Was Effectively Ameliorated by Choline and, to a Lesser Extent, Betaine. J Nutr Sci Vitaminol (Tokyo) 2019; 65:94-101. [PMID: 30814419 DOI: 10.3177/jnsv.65.94] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Despite previous studies suggesting that choline and betaine ameliorate lipid accumulation in rat livers, the relative effectiveness of the two nutrients is unclear. We examined the efficacy of dietary supplementation with choline or betaine in ameliorating lipid accumulation induced by vitamin B6 (B6) deficiency in the rat liver. Male Wistar rats were fed control, B6-deficient, choline-supplemented B6-deficient, betaine-supplemented B6-deficient, or both choline and betaine-supplemented B6-deficient diets (all containing 9 g of l-methionine (Met)/kg) for 35 d. Two experiments were performed, i.e., one using 17 mmol/kg diet choline bitartrate, betaine anhydrous, and the combination and another using 8.5 mmol/kg diet. Rats fed a B6-deficient diet developed lipid accumulation in the liver with a reduction of plasma lipids induced by the disruption of Met metabolism. However, the addition of 17 mmol/kg diet choline or betaine was sufficient to ameliorate the disruptions of lipid and Met metabolism. Additionally, 8.5 mmol/kg diet choline ameliorated liver lipid deposition, while the same amount of betaine had no significant effects on liver or plasma lipid profiles. Supplementation with choline resulted in a higher liver betaine than that found using the same amount of betaine alone, although the overall liver betaine content was reduced in B6-deficient rats. Our findings indicate that choline is more effective than betaine in ameliorating B6 deficiency-related disruptions in Met metabolism and liver lipid accumulation by increasing liver betaine levels.
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Affiliation(s)
- Erina Kitagawa
- The United Graduate School of Agricultural Science, Gifu University.,Faculty of Health and Human Life, Nagoya Bunri University
| | - Yuki Ota
- The Graduate School of Applied Biological Sciences, Gifu University
| | - Maki Hasegawa
- Faculty of Applied Biological Sciences, Gifu University
| | - Tomoyuki Nakagawa
- The United Graduate School of Agricultural Science, Gifu University.,The Graduate School of Applied Biological Sciences, Gifu University.,Faculty of Applied Biological Sciences, Gifu University
| | - Takashi Hayakawa
- The United Graduate School of Agricultural Science, Gifu University.,The Graduate School of Applied Biological Sciences, Gifu University.,Faculty of Applied Biological Sciences, Gifu University
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Bayat P, Gatineau D, Lesage D, Robert V, Martinez A, Cole RB. Investigation of Hemicryptophane Host-Guest Binding Energies Using High-Pressure Collision-Induced Dissociation in Combination with RRKM Modeling. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:509-518. [PMID: 30478817 DOI: 10.1007/s13361-018-2109-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/20/2018] [Accepted: 11/06/2018] [Indexed: 06/09/2023]
Abstract
In advancing host-guest (H-G) chemistry, considerable effort has been spent to synthesize host molecules with specific and well-defined molecular recognition characteristics including selectivity and adjustable affinity. An important step in the process is the characterization of binding strengths of the H-G complexes that is typically performed in solution using NMR or fluorescence. Here, we present a mass spectrometry-based multimodal approach to obtain critical energies of dissociation for two hemicryptophane cages with three biologically relevant guest molecules. A combination of blackbody infrared radiative dissociation (BIRD) and high-pressure collision-induced dissociation (high-pressure CID), along with RRKM modeling, was employed for this purpose. For the two tested hemicryptophane hosts, the cage containing naphthyl linkages exhibited stronger interactions than the cage bearing phenyl linkages. For both cages, the order of guest stability is choline > acetylcholine > betaine. The information obtained by these types of mass spectrometric studies can provide new insight into the structural features that most influence the stability of H-G pairs, thereby providing guidance for future syntheses. Graphical Abstract.
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Affiliation(s)
- Parisa Bayat
- CNRS, Institut Parisien de Chimie Moléculaire, IPCM, Sorbonne Université, 75252 Cedex 05, Paris, France
| | - David Gatineau
- CNRS, Institut Parisien de Chimie Moléculaire, IPCM, Sorbonne Université, 75252 Cedex 05, Paris, France
- CNRS, UMR 5250, DCM, University of Grenoble Alpes, Grenoble, France
| | - Denis Lesage
- CNRS, Institut Parisien de Chimie Moléculaire, IPCM, Sorbonne Université, 75252 Cedex 05, Paris, France
| | - Vincent Robert
- Laboratoire de Chimie Quantique, Université de Strasbourg, 1, rue Blaise Pascal, 67008, Strasbourg, France
| | - Alexandre Martinez
- UMR CNRS 7313-iSm2, Equipe Chirosciences, Aix Marseille Université, Av. Escadrille Normandie-Niemen, 13397, Marseille, France
| | - Richard B Cole
- CNRS, Institut Parisien de Chimie Moléculaire, IPCM, Sorbonne Université, 75252 Cedex 05, Paris, France.
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Park J, Kim MS, Joo K, Lee J, Shin DH. An artificially constructed dimer through deformation of a short zinc-binding loop. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2017; 1866:205-213. [PMID: 29122686 DOI: 10.1016/j.bbapap.2017.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 10/24/2017] [Accepted: 11/01/2017] [Indexed: 10/18/2022]
Abstract
We have analyzed the crystal structure of the dimeric form of d-glycero-d-manno-heptose-1,7-bisphosphate phosphatase from Burkholderia thailandensis (BtGmhB), catalyzing the removal of the phosphate at the 7 position of d-glycero-d-manno-heptose-1,7-bisphosphate. The crystal structure of BtGmhB revealed a dimeric form caused by a disruption of a short zinc-binding loop. The dimeric BtGmhB structure was induced by triggering the loss of Zn2+via the protonation of cysteine residues at pH 4.8 of the crystallization condition. Similarly, the addition of EDTA also causes the dimerization of BtGmhB. It appears there are two dimeric forms in solution with and without the disulfide bridge mediated by Cys95. The disulfide-free dimer produced by the loss of Zn2+ in the short zinc-binding loop is further converted to a stable disulfide-bonded dimer in vitro. Though the two dimeric forms are reversible, both of them are inactive due to a deformation of the active site. Single and triple mutant experiments confirmed the presence of two dimeric forms in vitro. Phosphatase assay results showed that only a zinc-bound monomeric form contains catalytic activity in contrast to the inactive zinc-free dimeric forms. The monomer-to-dimer transition caused by the loss of Zn2+ observed in this study is an example of reversal phenomenon caused by artificial proteins containing protein engineered zinc-finger motifs where the monomer-to-dimer transitions occurred in the presence of Zn2+. Therefore, this unusual dimerization process may be applicable to designing proteins possessing a short zinc-binding loop with a novel regulatory role.
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Affiliation(s)
- Jimin Park
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Global Top5 Research Program, Ewha W. University, Seoul 03760, Republic of Korea
| | - Mi-Sun Kim
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Global Top5 Research Program, Ewha W. University, Seoul 03760, Republic of Korea
| | - Keehyoung Joo
- Center for in silico Protein Science, School of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-722, Republic of Korea
| | - Jooyoung Lee
- Center for in silico Protein Science, School of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-722, Republic of Korea.
| | - Dong Hae Shin
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Global Top5 Research Program, Ewha W. University, Seoul 03760, Republic of Korea.
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21
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Jozefkowicz C, Brambilla S, Frare R, Stritzler M, Piccinetti C, Puente M, Berini CA, Pérez PR, Soto G, Ayub N. Stable symbiotic nitrogen fixation under water-deficit field conditions by a stress-tolerant alfalfa microsymbiont and its complete genome sequence. J Biotechnol 2017; 263:52-54. [PMID: 29050878 DOI: 10.1016/j.jbiotec.2017.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 09/19/2017] [Accepted: 10/11/2017] [Indexed: 11/25/2022]
Abstract
We here characterized the stress-tolerant alfalfa microsymbiont Sinorhizobium meliloti B401. B401-treated plants showed high nitrogen fixation rates under humid and semiarid environments. The production of glycine betaine in isolated bacteroids positively correlated with low precipitation levels, suggesting that this compound acts as a critical osmoprotectant under field conditions. Genome analysis revealed that strain B401 contains alternative pathways for the biosynthesis and uptake of glycine betaine and its precursors. Such genomic information will offer substantial insight into the environmental physiology of this biotechnologically valuable nitrogen-fixing bacterium.
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Affiliation(s)
- Cintia Jozefkowicz
- Consejo Nacional de Investigaciones Científicas y Técnicas, CABA, Argentina; Instituto de Genética Ewald A. Favret (INTA), Buenos Aires, Argentina
| | - Silvina Brambilla
- Instituto de Genética Ewald A. Favret (INTA), Buenos Aires, Argentina
| | - Romina Frare
- Consejo Nacional de Investigaciones Científicas y Técnicas, CABA, Argentina; Instituto de Genética Ewald A. Favret (INTA), Buenos Aires, Argentina
| | - Margarita Stritzler
- Consejo Nacional de Investigaciones Científicas y Técnicas, CABA, Argentina; Instituto de Genética Ewald A. Favret (INTA), Buenos Aires, Argentina
| | - Carlos Piccinetti
- Instituto de Microbiología y Zoología Agrícola (INTA), Buenos Aires, Argentina
| | - Mariana Puente
- Instituto de Microbiología y Zoología Agrícola (INTA), Buenos Aires, Argentina
| | | | - Pedro Reyes Pérez
- Instituto de Genética Ewald A. Favret (INTA), Buenos Aires, Argentina
| | - Gabriela Soto
- Consejo Nacional de Investigaciones Científicas y Técnicas, CABA, Argentina; Instituto de Genética Ewald A. Favret (INTA), Buenos Aires, Argentina
| | - Nicolás Ayub
- Consejo Nacional de Investigaciones Científicas y Técnicas, CABA, Argentina; Instituto de Genética Ewald A. Favret (INTA), Buenos Aires, Argentina.
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22
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Shadmehr S, Fatemi Tabatabaei SR, Hosseinifar S, Tabandeh MR, Amiri A. Attenuation of heat stress-induced spermatogenesis complications by betaine in mice. Theriogenology 2017; 106:117-126. [PMID: 29049923 DOI: 10.1016/j.theriogenology.2017.10.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 10/04/2017] [Accepted: 10/04/2017] [Indexed: 12/20/2022]
Abstract
High temperatures can induce oxidative stress, impairment of spermatogenesis, and reduction of sperm quality and quantity concomitant with transient periods of partial or complete infertility in male mammals. Promising beneficial effects of betaine supplementation on the epididymal spermatozoa have been reported in experimental studies; however, its effects on testicular heat stress (HS)-induced impairment have yet to be determined. In the present study, betaine (Bet) was orally administrated (250 mg/kg day) during a 14-day period, before (Bet + HS group) or after (HS + Bet group) induction of testicular HS in 7-9 week-old male mice. HS was induced by testicular immersion in water at 42 °C in stress groups. Epididymal spermatozoa and testes were collected at days 14 and 28 after HS induction in order to analyze sperm characteristics, testicular oxidative status, and histological changes. Our studies showed that HS reduced testicular weight, the quality and quantity of epididymal spermatozoa, and impaired maturation of germinal cells. The levels of MDA, catalase, SOD, and GPX were increased in the testes of HS-induced mice (P < 0.01). Although betaine treatment before and after exposure to HS enhanced antioxidant defense (P < 0.05) and accelerated germinal epithelium regeneration, its effects on the characteristics of epididymal spermatozoa were scarce. On the other hand, in the absence of heat stress, quality and quantity of epididymal spermatozoa were improved following 14 days of betaine consumption. Our study revealed the beneficial effect of betaine on HS-induced complications of spermatogenesis, as well as its potency to improve epididymal spermatozoa in intact mice.
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Affiliation(s)
- Somayeh Shadmehr
- Department of Basic Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | | | - Shima Hosseinifar
- Department of Basic Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Mohammad Reza Tabandeh
- Department of Basic Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Alireza Amiri
- Department of Basic Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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López-Carrillo L, Gamboa-Loira B, Becerra W, Hernández-Alcaraz C, Hernández-Ramírez RU, Gandolfi AJ, Franco-Marina F, Cebrián ME. Dietary micronutrient intake and its relationship with arsenic metabolism in Mexican women. ENVIRONMENTAL RESEARCH 2016; 151:445-450. [PMID: 27565879 PMCID: PMC5457700 DOI: 10.1016/j.envres.2016.08.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 08/12/2016] [Accepted: 08/14/2016] [Indexed: 05/15/2023]
Abstract
INTRODUCTION Concentrations of inorganic arsenic (iAs) metabolites in urine present intra- and interindividual variations, which are determined not only by the magnitude of exposure to iAs, but also by differences in genetic, environmental and dietary factors. OBJECTIVE To evaluate whether differences in dietary intake of selected micronutrients are associated with the metabolism of iAs. METHODS The intake of 21 micronutrients was estimated for 1027 women living in northern Mexico using a food frequency questionnaire. Concentration of urinary metabolites of iAs was determined by high performance liquid chromatography inductively coupled plasma mass spectrometry (HPLC-ICP-MS) and the proportion of iAs metabolites was calculated (%iAs, monomethylarsonic acid [%MMA] and dimethylarsinic acid [%DMA]), as well as ratios corresponding to the first (MMA/iAs), second (DMA/MMA) and total methylation (DMA/iAs). RESULTS After adjustment for covariates, it was found that methionine, choline, folate, vitamin B12, Zn, Se and vitamin C favor elimination of iAs mainly by decreasing the %MMA and/or increasing %DMA in urine. CONCLUSIONS Our results confirm that diet contributes to the efficiency of iAs elimination. Further studies are needed to assess the feasibility of dietary interventions that modulate the metabolism of iAs and the consequent risk of diseases related to its exposure.
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Affiliation(s)
- Lizbeth López-Carrillo
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P., 62100 Cuernavaca, Morelos, Mexico.
| | - Brenda Gamboa-Loira
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P., 62100 Cuernavaca, Morelos, Mexico.
| | - Wendy Becerra
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P., 62100 Cuernavaca, Morelos, Mexico.
| | - César Hernández-Alcaraz
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P., 62100 Cuernavaca, Morelos, Mexico.
| | - Raúl Ulises Hernández-Ramírez
- Instituto Nacional de Salud Pública, Av. Universidad 655, Col. Santa María Ahuacatitlán, C.P., 62100 Cuernavaca, Morelos, Mexico.
| | - A Jay Gandolfi
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ 85721, USA.
| | - Francisco Franco-Marina
- Instituto Nacional de Enfermedades Respiratorias, Calz. Tlalpan 4502, Col. Sección XVI, Del. Tlalpan, C.P. 14080, D.F., Mexico.
| | - Mariano E Cebrián
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del IPN, Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Del. Gustavo A. Madero, C.P. 07360, D.F., Mexico.
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24
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Jaiswal SK, Sukla KK, Chauhan A, Lakhotia AR, Kumar A, Rai AK. Choline metabolic pathway gene polymorphisms and risk for Down syndrome: An association study in a population with folate-homocysteine metabolic impairment. Eur J Clin Nutr 2016; 71:45-50. [PMID: 27677362 DOI: 10.1038/ejcn.2016.190] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 08/23/2016] [Accepted: 08/26/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND/OBJECTIVES Choline is an essential nutrient involved in one-carbon metabolism, but its role in mechanisms underlying meiotic non-disjunction is poorly known. The relationship between folate-homocysteine metabolic pathway gene polymorphism and Down syndrome (DS) risk has been widely analyzed, but there are limited reports on its correlation with choline metabolism. In the present case-control association study, we investigated the relationship of three single-nucleotide polymorphisms (SNPs) (phosphatidylethanolamine N-methyltransferase (PEMT) rs12325817, choline dehydrogenase (CHDH) rs12676 and homocysteine methyltransferase (BHMT) rs3733890) of choline metabolism with risk for DS. SUBJECT/METHODS Genotyping of 228 mothers of a down syndrome child (DSM) and 200 control mothers (CMs) for all SNPs was performed by PCR coupled with restriction fragment length polymorphism method. RESULTS A significantly increased risk for BHMT +742AA genotype with an odds ratio of 4.96 (95% confidence interval (CI): 1.66-14.88, P=0.0036) was observed. For PEMT rs12325817 and CHDH rs12676, no significant difference in allelic and genotypic frequencies was observed. In genotypic combination analysis considering PEMT -744GG/CHDH +432GG/BHMT +742GG as the reference combination, PEMT -744GC/CHDH +432GG/BHMT +742GG genotypic combination was significantly higher in DSM compared with that in CMs with an odds ratio of 2.061 (95% CI: 1.10-3.86, P=0.0342). We also observed an epistatic interaction between methylenetetrahydrofolate reductase (MTHFR) rs1801133 and choline metabolic pathway gene variants. CONCLUSIONS Our findings indicate impaired choline metabolism showing a greater risk for DS, especially in a population associated with homocysteine-folate impairment. Further studies are required to confirm our findings.
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Affiliation(s)
- S K Jaiswal
- Centre for Genetic Disorders, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - K K Sukla
- Cytogenetics Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - A Chauhan
- Applied Microbiology, Department of Botany, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - A R Lakhotia
- Department of Gynecology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - A Kumar
- Department of Pediatrics, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - A K Rai
- Centre for Genetic Disorders, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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25
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Zou H, Chen N, Shi M, Xian M, Song Y, Liu J. The metabolism and biotechnological application of betaine in microorganism. Appl Microbiol Biotechnol 2016; 100:3865-76. [PMID: 27005411 DOI: 10.1007/s00253-016-7462-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/08/2016] [Accepted: 03/09/2016] [Indexed: 11/29/2022]
Abstract
Glycine betaine (betaine) is widely distributed in nature and can be found in many microorganisms, including bacteria, archaea, and fungi. Due to its particular functions, many microorganisms utilize betaine as a functional chemical and have evolved different metabolic pathways for the biosynthesis and catabolism of betaine. As in animals and plants, the principle role of betaine is to protect microbial cells against drought, osmotic stress, and temperature stress. In addition, the role of betaine in methyl group metabolism has been observed in a variety of microorganisms. Recent studies have shown that betaine supplementation can improve the performance of microbial strains used for the fermentation of lactate, ethanol, lysine, pyruvate, and vitamin B12, during which betaine can act as stress protectant or methyl donor for the biosynthesis of structurally complex compounds. In this review, we summarize the transport, synthesis, catabolism, and functions of betaine in microorganisms and discuss potential engineering strategies that employ betaine as a methyl donor for the biosynthesis of complex secondary metabolites such as a variety of vitamins, coenzymes, and antibiotics. In conclusion, the biocompatibility, C/N ratio, abundance, and comprehensive metabolic information of betaine collectively indicate that this molecule has great potential for broad applications in microbial biotechnology.
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Affiliation(s)
- Huibin Zou
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. .,CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.
| | - Ningning Chen
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Mengxun Shi
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Mo Xian
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Yimin Song
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
| | - Junhong Liu
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China
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26
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Betaine chemistry, roles, and potential use in liver disease. Biochim Biophys Acta Gen Subj 2016; 1860:1098-106. [PMID: 26850693 DOI: 10.1016/j.bbagen.2016.02.001] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 01/26/2016] [Accepted: 02/01/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND Betaine is the trimethyl derivative of glycine and is normally present in human plasma due to dietary intake and endogenous synthesis in liver and kidney. Betaine is utilized in the kidney primarily as an osmoprotectant, whereas in the liver its primary role is in metabolism as a methyl group donor. In both organs, a specific betaine transporter mediates cellular uptake of betaine from plasma. The abundance of both betaine and the betaine transporter in liver greatly exceeds that of other organs. SCOPE OF REVIEW The remarkable contributions of betaine to normal human and animal health are summarized together with a discussion of the mechanisms and potential beneficial effects of dietary betaine supplements on liver disease. MAJOR CONCLUSIONS A significant amount of data from animal models of liver disease indicates that administration of betaine can halt and even reverse progression of the disruption of liver function. Betaine is well-tolerated, inexpensive, effective over a wide range of doses, and is already used in livestock feeding practices. GENERAL SIGNIFICANCE The accumulated data indicate that carefully controlled additional investigations in humans are merited. The focus should be on the long-term use of betaine in large patient populations with liver diseases characterized by development of fatty liver, especially non-alcoholic fatty liver disease and alcoholic liver disease.
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Downregulation of betaine homocysteine methyltransferase (BHMT) in hepatocellular carcinoma associates with poor prognosis. Tumour Biol 2015; 37:5911-7. [PMID: 26592251 DOI: 10.1007/s13277-015-4443-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Accepted: 11/13/2015] [Indexed: 12/13/2022] Open
Abstract
Betaine homocysteine methyltransferase (BHMT) catalyzes the synthesis of methionine using betaine and homocysteine (Hcy), which is restricted to the liver and kidney. Impaired BHMT pathway has been associated with hepatocellular carcinogenesis in Bhmt-/- mice model, and decreased BHMT was observed in a small sample of human hepatocellular carcinoma (HCC) patients. However, the prognostic significance of BHMT in HCC has not been elucidated. This study aimed to examine the expression of BHMT in HCC and investigate the relationship between its expression and prognosis of HCC patients. BHMT expression was analyzed in 68 paired HCC samples (HCC tissues vs matched adjacent non-cancerous liver tissues), 115 paraffin-embedded HCC sections (primary cohort), and 65 paraffin-embedded HCC sections (validation cohort) using immunohistochemistry (IHC). The results of IHC analysis showed that BHMT was decreased in tumorous tissues in 85.2 % (58/68) of cases compared to the corresponding adjacent non-tumorous liver tissues. Further correlation analyses indicated that the decreased BHMT expression was closely correlated with serum α-fetoprotein (AFP) (p = 0.011), tumor size (p = 0.039), and vascular invasion (p = 0.017). Moreover, HCC patients with low BHMT expression had shorter overall survival (OS) and time to recurrence (TTR) than those with high BHMT expression in both primary cohort (p < 0.0001) and validation cohort (p < 0.05) assessed by the Kaplan-Meier method. In addition, multivariate analysis showed that BHMT was an independent prognostic factor for OS and TTR in the two cohorts (all p < 0.005). Collectively, our study demonstrated that BHMT could be served as a potential prognostic marker for HCC patients.
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Nickler M, Ottiger M, Steuer C, Huber A, Anderson JB, Müller B, Schuetz P. Systematic review regarding metabolic profiling for improved pathophysiological understanding of disease and outcome prediction in respiratory infections. Respir Res 2015; 16:125. [PMID: 26471192 PMCID: PMC4608151 DOI: 10.1186/s12931-015-0283-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 09/29/2015] [Indexed: 01/07/2023] Open
Abstract
Metabolic profiling through targeted quantification of a predefined subset of metabolites, performed by mass spectrometric analytical techniques, allows detailed investigation of biological pathways and thus may provide information about the interaction of different organic systems, ultimately improving understanding of disease risk and prognosis in a variety of diseases. Early risk assessment, in turn, may improve patient management in regard to cite-of-care decisions and treatment modalities. Within this review, we focus on the potential of metabolic profiling to improve our pathophysiological understanding of disease and management of patients. We focus thereby on lower respiratory tract infections (LRTI) including community-acquired pneumonia (CAP) and chronic obstructive pulmonary disease (COPD), an important disease responsible for high mortality, morbidity and costs worldwide. Observational data from numerous clinical and experimental studies have provided convincing data linking metabolic blood biomarkers such as lactate, glucose or cortisol to patient outcomes. Also, identified through metabolomic studies, novel innovative metabolic markers such as steroid hormones, biogenic amines, members of the oxidative status, sphingo- and glycerophospholipids, and trimethylamine-N-oxide (TMAO) have shown promising results. Since many uncertainties remain in predicting mortality in these patients, further prospective and retrospective observational studies are needed to uncover metabolic pathways responsible for mortality associated with LRTI. Improved understanding of outcome-specific metabolite signatures in LRTIs may optimize patient management strategies, provide potential new targets for future individual therapy, and thereby improve patients' chances for survival.
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Affiliation(s)
- Manuela Nickler
- Medical University Department, Division of General Internal and Emergency Medicine, Kantonsspital Aarau, Aarau, Switzerland.
| | - Manuel Ottiger
- Medical University Department, Division of General Internal and Emergency Medicine, Kantonsspital Aarau, Aarau, Switzerland.
| | - Christian Steuer
- Department of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland.
| | - Andreas Huber
- Department of Laboratory Medicine, Kantonsspital Aarau, Aarau, Switzerland.
| | | | - Beat Müller
- Medical University Department, Division of General Internal and Emergency Medicine, Kantonsspital Aarau, Aarau, Switzerland.
| | - Philipp Schuetz
- Medical University Department, Division of General Internal and Emergency Medicine, Kantonsspital Aarau, Aarau, Switzerland.
- University Department of Medicine, Kantonsspital Aarau, Tellstrasse, CH-5001, Aarau, Switzerland.
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Shahfiza N, Osman H, Hock TT, Shaari K, Abdel-Hamid AHZ. Metabolomics for characterization of gender differences in patients infected with dengue virus. ASIAN PAC J TROP MED 2015. [PMID: 26194829 DOI: 10.1016/j.apjtm.2015.05.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE To determine the metabolic response associate with dengue infection based on human gender metabolic differences by means of (1)H NMR-spectrometry. METHODS The mid-stream urine collected from both male and female patients diagnosed with dengue fever at Penang General Hospital and fourty-three healthy individuals were analyzed with (1)H NMR spectroscopy, followed by chemometric multivariate analysis. NMR signals which highlighted in the OPLS-DA S-plot were further selected and identified using Human Metabolome Database, Chenomx Profiler. RESULTS The results pointed out that NMR urine profiling was able to capture human gender metabolic differences that are important for the distinction of classes of individuals of similar physiological conditions; infected with dengue. Distinct differences between dengue infected patients versus healthy individuals and subtle differences in male versus female infected with dengue were found to be related to the metabolism of amino acid and tricarboxylic acid intermediates cycle. CONCLUSIONS The (1)H NMR metabolomic investigation combined with appropriate algorithms and pattern recognition procedures, gave an evidence for the existence of distinct metabolic differentiation of individuals, according to their gender, modulates with the infection risk.
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Affiliation(s)
- Nurul Shahfiza
- Advanced Medical and Dental Institute, University Science Malaysia, Malaysia
| | - Hasnah Osman
- School of Chemical Sciences, University Science Malaysia, Malaysia
| | - Tang T Hock
- Advanced Medical and Dental Institute, University Science Malaysia, Malaysia
| | - Khozirah Shaari
- Laboratory of Natural Products, Institute of Bioscience, Universiti Putra Malaysia, Malaysia
| | - Abdel-Hamid Z Abdel-Hamid
- Advanced Medical and Dental Institute, University Science Malaysia, Malaysia; National Research Centre, Cairo, Egypt.
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Poulin MB, Du Q, Schramm VL. Chemoenzymatic Synthesis of (36)S Isotopologues of Methionine and S-Adenosyl-L-methionine. J Org Chem 2015; 80:5344-7. [PMID: 25884979 DOI: 10.1021/acs.joc.5b00608] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Substrates containing isotope labels at specific atoms are required for transition-state analysis based on the measurement of multiple kinetic isotope effects.(36)S-labeled l-methionine and S-adenosyl-l-methionine were synthesized from elemental sulfur using a chemoenzymatic approach with >98% (36)S enrichment. This method provides access to previously inaccessible sulfur isotope-labeled substrates for sulfur kinetic isotope effect studies.
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Affiliation(s)
- Myles B Poulin
- Department of Biochemistry, Albert Einstein College of Medicine of Yeshiva University, 1300 Morris Park Avenue, Bronx, New York 10461, United States
| | - Quan Du
- Department of Biochemistry, Albert Einstein College of Medicine of Yeshiva University, 1300 Morris Park Avenue, Bronx, New York 10461, United States
| | - Vern L Schramm
- Department of Biochemistry, Albert Einstein College of Medicine of Yeshiva University, 1300 Morris Park Avenue, Bronx, New York 10461, United States
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Hiong KC, Ip YK, Wong WP, Chew SF. Differential gene expression in the liver of the African lungfish, Protopterus annectens, after 6 months of aestivation in air or 1 day of arousal from 6 months of aestivation. PLoS One 2015; 10:e0121224. [PMID: 25822522 PMCID: PMC4378924 DOI: 10.1371/journal.pone.0121224] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 01/29/2015] [Indexed: 01/15/2023] Open
Abstract
The African lungfish, Protopterus annectens, can undergo aestivation during drought. Aestivation has three phases: induction, maintenance and arousal. The objective of this study was to examine the differential gene expression in the liver of P. annectens after 6 months (the maintenance phase) of aestivation as compared with the freshwater control, or after 1 day of arousal from 6 months aestivation as compared with 6 months of aestivation using suppression subtractive hybridization. During the maintenance phase of aestivation, the mRNA expression of argininosuccinate synthetase 1 and carbamoyl phosphate synthetase III were up-regulated, indicating an increase in the ornithine-urea cycle capacity to detoxify ammonia to urea. There was also an increase in the expression of betaine homocysteine-S-transferase 1 which could reduce and prevent the accumulation of hepatic homocysteine. On the other hand, the down-regulation of superoxide dismutase 1 expression could signify a decrease in ROS production during the maintenance phase of aestivation. In addition, the maintenance phase was marked by decreases in expressions of genes related to blood coagulation, complement fixation and iron and copper metabolism, which could be strategies used to prevent thrombosis and to conserve energy. Unlike the maintenance phase of aestivation, there were increases in expressions of genes related to nitrogen, carbohydrate and lipid metabolism and fatty acid transport after 1 day of arousal from 6 months aestivation. There were also up-regulation in expressions of genes that were involved in the electron transport system and ATP synthesis, indicating a greater demand for metabolic energy during arousal. Overall, our results signify the importance of sustaining a low rate of waste production and conservation of energy store during the maintenance phase, and the dependence on internal energy store for repair and structural modification during the arousal phase, of aestivation in the liver of P. annectens.
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Affiliation(s)
- Kum C. Hiong
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Republic of Singapore
| | - Yuen K. Ip
- Department of Biological Science, National University of Singapore, Singapore, Republic of Singapore
| | - Wai P. Wong
- Department of Biological Science, National University of Singapore, Singapore, Republic of Singapore
| | - Shit F. Chew
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Republic of Singapore
- * E-mail:
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Ong JLY, Woo JM, Hiong KC, Ching B, Wong WP, Chew SF, Ip YK. Molecular characterization of betaine-homocysteine methyltransferase 1 from the liver, and effects of aestivation on its expressions and homocysteine concentrations in the liver, kidney and muscle, of the African lungfish, Protopterus annectens. Comp Biochem Physiol B Biochem Mol Biol 2015; 183:30-41. [PMID: 25575738 DOI: 10.1016/j.cbpb.2014.12.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Revised: 12/19/2014] [Accepted: 12/23/2014] [Indexed: 01/12/2023]
Abstract
Homocysteine accumulation has numerous deleterious effects, and betaine-homocysteine S-methyltransferase (BHMT) catalyses the synthesis of methionine from homocysteine and betaine. This study aimed to determine homocysteine concentrations, and mRNA expression levels and protein abundances of bhmt1/Bhmt1 in the liver, kidney and muscle of the African lungfish, Protopterus annectens, during the induction (6 days), maintenance (6 months) or arousal (3 days after arousal) phase of aestivation. The homocysteine concentration decreased significantly in the liver of P. annectens after 6 days or 6 months of aestivation, but it returned to the control level upon arousal. By contrast, homocysteine concentrations in the kidney and muscle remained unchanged during the three phases of aestivation. The complete coding cDNA sequence of bhmt1 from P. annectens consisted of 1236 bp, coding for 412 amino acids. The Bhmt1 from P. annectens had a close phylogenetic relationship with those from tetrapods and Callorhinchus milii. The expression of bhmt1 was detected in multiple organs/tissues of P. annectens, and this is the first report on the expression of bhmt1/Bhmt1 in animal skeletal muscle. The mRNA and protein expression levels of bhmt1/Bhmt1 were up-regulated in the liver of P. annectens during the induction and maintenance phases of aestivation, possibly to regulate the hepatic homocysteine concentration. The significant increase in hepatic Bhmt1 protein abundance during the arousal phase could be a response to increased cellular methylation for the purpose of tissue reconstruction. Unlike the liver, Bhmt1 expression in the kidney and muscle of P. annectens was regulated translationally, and its up-regulation could be crucial to prevent homocysteine accumulation.
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Affiliation(s)
- Jasmine L Y Ong
- Department of Biological Sciences, National University of Singapore, 10 Kent Ridge Road, Singapore 117543, Republic of Singapore
| | - Jia M Woo
- Department of Biological Sciences, National University of Singapore, 10 Kent Ridge Road, Singapore 117543, Republic of Singapore
| | - Kum C Hiong
- Department of Biological Sciences, National University of Singapore, 10 Kent Ridge Road, Singapore 117543, Republic of Singapore
| | - Biyun Ching
- Department of Biological Sciences, National University of Singapore, 10 Kent Ridge Road, Singapore 117543, Republic of Singapore
| | - Wai P Wong
- Department of Biological Sciences, National University of Singapore, 10 Kent Ridge Road, Singapore 117543, Republic of Singapore
| | - Shit F Chew
- Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore
| | - Yuen K Ip
- Department of Biological Sciences, National University of Singapore, 10 Kent Ridge Road, Singapore 117543, Republic of Singapore; The Tropical Marine Science Institute, National University of Singapore, Kent Ridge, Singapore 119227, Republic of Singapore.
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Li X, Sun Q, Li X, Cai D, Sui S, Jia Y, Song H, Zhao R. Dietary betaine supplementation to gestational sows enhances hippocampal IGF2 expression in newborn piglets with modified DNA methylation of the differentially methylated regions. Eur J Nutr 2014; 54:1201-10. [DOI: 10.1007/s00394-014-0799-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 11/06/2014] [Indexed: 01/13/2023]
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Mládková J, Hladílková J, Diamond CE, Tryon K, Yamada K, Garrow TA, Jungwirth P, Koutmos M, Jiráček J. Specific potassium ion interactions facilitate homocysteine binding to betaine-homocysteine S
-methyltransferase. Proteins 2014; 82:2552-64. [DOI: 10.1002/prot.24619] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 05/24/2014] [Accepted: 05/28/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Jana Mládková
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; v.v.i., Flemingovo nám. 2, 166 10 Prague 6 Czech Republic
| | - Jana Hladílková
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; v.v.i., Flemingovo nám. 2, 166 10 Prague 6 Czech Republic
| | - Carrie E. Diamond
- Department of Food Science and Human Nutrition; University of Illinois; Urbana Illinois 61801
| | - Katherine Tryon
- Department of Food Science and Human Nutrition; University of Illinois; Urbana Illinois 61801
| | - Kazuhiro Yamada
- Department of Biochemistry and Molecular Biology; Uniformed Services University of the Health Sciences; Bethesda Maryland 20814
| | - Timothy A. Garrow
- Department of Food Science and Human Nutrition; University of Illinois; Urbana Illinois 61801
| | - Pavel Jungwirth
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; v.v.i., Flemingovo nám. 2, 166 10 Prague 6 Czech Republic
| | - Markos Koutmos
- Department of Biochemistry and Molecular Biology; Uniformed Services University of the Health Sciences; Bethesda Maryland 20814
| | - Jiří Jiráček
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; v.v.i., Flemingovo nám. 2, 166 10 Prague 6 Czech Republic
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Ganu R, Garrow T, Koutmos M, Rund L, Schook LB. Splicing variants of the porcine betaine-homocysteine S-methyltransferase gene: implications for mammalian metabolism. Gene 2013; 529:228-37. [PMID: 23948084 PMCID: PMC3894628 DOI: 10.1016/j.gene.2013.07.103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 07/23/2013] [Accepted: 07/30/2013] [Indexed: 12/18/2022]
Abstract
Betaine-homocysteine S-methyltransferase (BHMT) activity is only detected in the liver of rodents, but in both the liver and kidney cortex of humans and pigs; therefore, the pig was chosen as a model to define the spatial and temporal expression of BHMT during development. During fetal development, a total of ten splice variants of bhmt were expressed at varying levels across a wide range of porcine tissues. Two variants contained an identical ORF that encoded a C-terminal truncated form of BHMT (tBHMT). The bhmt transcripts were expressed at significant levels in the liver and kidney from day 45 of gestation (G45) onward. The transcripts encoding tBHMT represented 5-13% of the total bhmt transcripts in G30 fetus, G45 liver, and adult liver and kidney cortex. The dominant structural feature of wild type BHMT is an (βα)8 barrel, however, a modeled structure of tBHMT suggests that this protein would assume a horseshoe fold and lack methyltransferase activity. Low BHMT activity was detected in the G30 fetus, and slightly increased levels of activity were observed in the liver from G45 and G90 fetuses. The bhmt promoter contained three key CpG sites, and methylation of these sites was significantly higher in adult lung compared to adult liver. The data reported herein suggest that genomic DNA methylation and variation of the 5' and 3' UTRs of bhmt transcripts are key regulators for the level of BHMT transcription and translation.
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Affiliation(s)
- Radhika Ganu
- Division of Nutritional Sciences, University of Illinois, Urbana, IL 61801
| | - Timothy Garrow
- Department of Food Science and Human Nutrition, University of Illinois, Urbana, IL 61801
| | - Markos Koutmos
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814
| | - Laurie Rund
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801
| | - Lawrence B. Schook
- Division of Nutritional Sciences, University of Illinois, Urbana, IL 61801
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801
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Pakfetrat M, Shahroodi JR, Zolgadr AA, Larie HA, Nikoo MH, Malekmakan L. Effects of zinc supplement on plasma homocysteine level in end-stage renal disease patients: a double-blind randomized clinical trial. Biol Trace Elem Res 2013; 153:11-5. [PMID: 23475369 DOI: 10.1007/s12011-013-9639-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 02/22/2013] [Indexed: 12/27/2022]
Abstract
Increased homocysteine (hCys) level is an independent risk factor for cardiovascular complications in end-stage renal disease (ESRD) patients. The aim of this study was to evaluate effect of zinc (Zn) supplement on serum hCys level in ESRD patients. One hundred ESRD patients with Zn deficiency were enrolled in this double-blind randomized clinical trial. They were randomly subdivided into two groups and supplemented with Zn (Zn group) or placebo (control group) for 6 weeks. Fasting plasma hCys and Zn levels were measured before and at 43rd days after the start of the study. Serum Zn levels increased significantly (p < 0.0001), in Zn-treated group in comparison to placebo-treated group. In the Zn-treated group, serum hCys levels reduced significantly (p < 0.0001), compared to placebo group (p > 0.05). There was a significant (p < 0.0001) reduction of mean percentage of hCys in Zn-treated group compared to the placebo group. Our study showed that Zn supplementation decreases serum hCys levels in ESRD patients with Zn deficiency.
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Affiliation(s)
- Maryam Pakfetrat
- Department of Internal Medicine, Shiraz Nephro-Urology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Fridman O, Morales AV, Bortoni LE, Turk-Noceto PC, Prieto EA. Corticoadrenal activity in rat regulates betaine-homocysteine S-methyltransferase expression with opposite effects in liver and kidney. J Biosci 2012; 37:115-23. [PMID: 22357209 DOI: 10.1007/s12038-011-9171-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Betaine-homocysteine S-methyltransferase (BHMT) is an enzyme that converts homocysteine (Hcy) to methionine using betaine as a methyl donor. Betaine also acts as osmolyte in kidney medulla, protecting cells from high extracellular osmolarity. Hepatic BHMT expression is regulated by salt intake. Hormones, particularly corticosteroids, also regulate BHMT expression in rat liver. We investigated to know whether the corticoadrenal activity plays a role in kidney BHMT expression. BHMT activity in rat kidneys is several orders of magnitude lower than in rat livers and only restricted to the renal cortex. This study confirms that corticosteroids stimulate BHMT activity in the liver and, for the first time in an animal model, also up-regulate the BHMT gene expression. Besides, unlike the liver, corticosteroids in rat kidney down-regulate BHMT expression and activity. Given that the classical effect of adrenocortical activity on the kidney is associated with sodium and water re-absorption by the distal tubule leading to volume expansion, by promoting lesser use of betaine as a methyl donor, corticosteroids would preserve betaine for its other role as osmoprotectant against changes in the extracellular osmotic conditions. We conclude that corticosteroids are, at least in part, responsible for the inhibition of BHMT expression and activity in rat kidneys.
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Affiliation(s)
- Osvaldo Fridman
- Centro de Altos Estudios en Ciencias Humanas y de la Salud, Universidad Abierta Interamericana (UAI), Buenos Aires, Argentina.
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Alirezaei M, Niknam P, Jelodar G. Betaine Elevates Ovarian Antioxidant Enzyme Activities and Demonstrates Methyl Donor Effect in Non-Pregnant Rats. Int J Pept Res Ther 2012. [DOI: 10.1007/s10989-012-9300-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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40
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Alirezaei M, Jelodar G, Ghayemi Z. Antioxidant Defense of Betaine Against Oxidative Stress Induced by Ethanol in the Rat Testes. Int J Pept Res Ther 2012. [DOI: 10.1007/s10989-012-9297-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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41
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Yamamoto K, Sasakawa Y, Nakaoka F, Nakao M, Nakamura M, Kominami A, Abe M, Fukuhama C, Kagawa K. Effect of globin digest on the liver injury and hepatic gene expression profile in galactosamine-induced liver injury in SD rats. Life Sci 2011; 88:701-12. [PMID: 21334349 DOI: 10.1016/j.lfs.2011.02.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 12/24/2010] [Accepted: 02/02/2011] [Indexed: 11/17/2022]
Abstract
AIMS We investigated the effect of globin digest (GD) on the liver injury and hepatic gene expression profile in galactosamine (GalN)-induced liver injury. MAIN METHODS The effect of GD on the liver injury was examined by measuring the activities of serum transferases and hepatic antioxidant enzymes, histopathological analysis, gene expression profile, and proteins of the peroxisome proliferator-activated receptor alpha (PPARα) and met proto-oncogene (c-Met) in SD rats at 24 h after GalN administration. The effect of GD on the expression of PPARα and its target gene in AML-12 mouse hepatocytes was also examined. KEY FINDINGS GD suppressed the elevated activities of serum transferases in GalN-induced liver injury in SD rats. The thiobarbituric acid reactive substance content in GalN-injured liver was a decreasing tendency by GD. GD suppressed the increased oxidized glutathione content, and increased the decreased protein, reduced glutathione contents, and catalase activity in GalN-injured liver. GD may improve the antioxidant defense system and protein synthesis in GalN-injured liver. GD suppressed the elevated expression of the genes related to the inflammation, and decreased the histopathological grade value of inflammatory cell infiltration in GalN-injured liver. GD increased the expression of PPARα protein in GalN-injured liver, and also increased the expression of PPARα and its target gene in AML-12 hepatocytes. The total and phosphorylated c-Met proteins in GalN-injured liver were the increasing tendencies by GD. SIGNIFICANCE These findings indicate that GD has the hepatoprotective effect on GalN-induced liver injury in SD rats.
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Affiliation(s)
- Kaori Yamamoto
- MG Pharma Inc., 7-7-25, Saito-Asagi, Ibaraki, Osaka 567-0085, Japan
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Feng Q, Kalari K, Fridley BL, Jenkins G, Ji Y, Abo R, Hebbring S, Zhang J, Nye MD, Leeder JS, Weinshilboum RM. Betaine-homocysteine methyltransferase: human liver genotype-phenotype correlation. Mol Genet Metab 2011; 102:126-33. [PMID: 21093336 PMCID: PMC3053054 DOI: 10.1016/j.ymgme.2010.10.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 10/15/2010] [Indexed: 01/31/2023]
Abstract
Betaine-homocysteine methyltransferase (BHMT) catalyzes the remethylation of homocysteine. BHMT is highly expressed in the human liver. In the liver, BHMT catalyzes up to 50% of homocysteine metabolism. Understanding the relationship between BHMT genetic polymorphisms and function might increase our understanding of the role of this reaction in homocysteine remethylation and in S-adenosylmethionine-dependent methylation. To help achieve those goals, we measured levels of BHMT enzyme activity and immunoreactive protein in 268 human hepatic surgical biopsy samples from adult subjects as well as 73 fetal hepatic tissue samples obtained at different gestational ages. BHMT protein levels were correlated significantly (p<0.001) with levels of enzyme activity in both fetal and adult tissues, but both were decreased in fetal tissue when compared with levels in the adult hepatic biopsies. To determine possible genotype-phenotype correlations, 12 tag SNPs for BHMT and the closely related BHMT2 gene were selected from SNPs observed during our own gene resequencing studies as well as from HapMap. These SNPs data were used to genotype DNA from the adult hepatic surgical biopsy samples, and genotype-phenotype association analysis was performed. Three SNPs (rs41272270, rs16876512, and rs6875201), located 28kb upstream, in the 5'-UTR and in intron 1 of BHMT, respectively, were significantly correlated with both BHMT activity (p=3.41E-8, 2.55E-9 and 2.46E-10, respectively) and protein levels (p=5.78E-5, 1.08E-5 and 6.92E-6, respectively). We also imputed 230 additional SNPs across the BHMT and BHMT2 genes, identifying an additional imputed SNP, rs7700790, that was also highly associated with hepatic BHMT enzyme activity and protein. However, none of the 3 genotyped or one imputed SNPs displayed a "shift" during electrophoretic mobility shift assays. These observations may help us to understand individual variation in the regulation of BHMT in the human liver and its possible relationship to variation in methylation.
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Affiliation(s)
- Qiping Feng
- Division of Clinical Pharmacology, Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
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Ko BK, Kim KM, Hong YS, Lee CH. Metabolomic assessment of fermentative capability of soybean starter treated with high pressure. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:8738-47. [PMID: 20681663 DOI: 10.1021/jf101994u] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Meju, a brick of dried fermented soybean naturally inoculated with microorganisms, is a starter used for producing traditional Korean fermented soybean products such as soybean paste (doenjang) and soy sauce (ganjang). In order to reduce aging time during production of soybean paste and soy sauce, high pressure (HP) treatment was applied to the meju starter at 500 MPa of pressure for 10 min at 15 degrees C. Fermentative behaviors of normal and HP-treated meju were assessed and compared through physicochemical and (1)H NMR-based metabolomic analysis. All mejues were incubated for 3 weeks at 30 degrees C. At 1 week of incubation, total bacterial population decreased mainly due to a reduction of water content by spontaneous evaporation during the incubation period. As the incubation time increased, glutamate, proline, betain, choline, and phosphocholine levels increased in both normal and HP-treated mejues, indicating that microorganisms in the mejues synthesize these metabolites to endure intracellular hyperosmotic stress induced by the reduction in water content. Through 3 weeks of incubation, the amino-type nitrogen contents and neutral protease activities in HP-treated meju were significantly higher (p < 0.05) than in normal meju, even though total bacterial content in HP-treated meju was 2 or 3 times lower. Moreover, marked increases in glycerol, acetate, tyrosine, and choline levels were observed in HP-treated meju compared to normal meju. In particular, higher levels of tyrosine in HP-treated meju were consistent with the increased neutral protease activities compared to normal meju, indicating an improvement in enzyme stability with HP treatment. These findings highlight a new or better understanding of the influence of the HP or physical treatments on fermentative products in food processing, such as those associated with soybean paste and soy sauce, regarding metabolic behaviors in fermentative starter induced by HP treatment.
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Affiliation(s)
- Bong-Kuk Ko
- School of Life Science and Biotechnology, Korea University, Seoul 136-701, Republic of Korea
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Lever M, Slow S. The clinical significance of betaine, an osmolyte with a key role in methyl group metabolism. Clin Biochem 2010; 43:732-44. [DOI: 10.1016/j.clinbiochem.2010.03.009] [Citation(s) in RCA: 273] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 03/16/2010] [Accepted: 03/17/2010] [Indexed: 01/29/2023]
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Santos EM, Ball JS, Williams TD, Wu H, Ortega F, van Aerle R, Katsiadaki I, Falciani F, Viant MR, Chipman JK, Tyler CR. Identifying health impacts of exposure to copper using transcriptomics and metabolomics in a fish model. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:820-826. [PMID: 20020678 DOI: 10.1021/es902558k] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Copper (Cu) is a micronutrient essential for the biochemical functioning of numerous processes in vertebrates but is also often present in the aquatic environment at concentrations able to cause adverse health effects in aquatic organisms. This study investigated the signaling pathways mediating the effects of exposure to Cu using a toxicogenomic approach in a fish model, the stickleback ( Gasterosteus aculeatus ). Freshwater-acclimated male fish were exposed via the water to Cu, including at environmentally relevant concentrations (3.2-128 microg of Cu/L for 4 days), and the biological responses explored through analyses of the hepatic transcriptome and metabolome and phenotypic end points, including assessment of DNA damage in blood cells. The Cu exposures resulted in DNA strand breaks in blood cells at all exposure concentrations and alterations in hepatic gene expression and metabolite concentrations in a concentration-dependent manner (from 10 microg of Cu/L). Genes associated with the cholesterol biosynthesis pathway were significantly over-represented and consistently down-regulated (at 128 microg of Cu/L), similar to that occurring in a mouse model for Wilson's disease. Additionally, inductions in metallothionein and catalase were also observed. The concentrations of NAD(+) and lactate increased significantly with the Cu exposure, consistent with a shift toward anaerobic metabolism, and these aligned closely with changes observed in gene expression. The pathways of Cu toxicity identified in our study support the conserved mechanisms of Cu toxicity from lower vertebrates to mammals, provide novel insights into the deleterious effects of Cu in fish, and further demonstrate the utility of fish as environmental sentinels for chemical impacts on both environmental and human health.
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Affiliation(s)
- Eduarda M Santos
- School of Biosciences, University of Exeter, Exeter, Devon EX4 4PS, United Kingdom.
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Fan SW, George RA, Haworth NL, Feng LL, Liu JY, Wouters MA. Conformational changes in redox pairs of protein structures. Protein Sci 2009; 18:1745-65. [PMID: 19598234 PMCID: PMC2776962 DOI: 10.1002/pro.175] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Disulfides are conventionally viewed as structurally stabilizing elements in proteins but emerging evidence suggests two disulfide subproteomes exist. One group mediates the well known role of structural stabilization. A second redox-active group are best known for their catalytic functions but are increasingly being recognized for their roles in regulation of protein function. Redox-active disulfides are, by their very nature, more susceptible to reduction than structural disulfides; and conversely, the Cys pairs that form them are more susceptible to oxidation. In this study, we searched for potentially redox-active Cys Pairs by scanning the Protein Data Bank for structures of proteins in alternate redox states. The PDB contains over 1134 unique redox pairs of proteins, many of which exhibit conformational differences between alternate redox states. Several classes of structural changes were observed, proteins that exhibit: disulfide oxidation following expulsion of metals such as zinc; major reorganisation of the polypeptide backbone in association with disulfide redox-activity; order/disorder transitions; and changes in quaternary structure. Based on evidence gathered supporting disulfide redox activity, we propose disulfides present in alternate redox states are likely to have physiologically relevant redox activity.
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Affiliation(s)
- Samuel W Fan
- Structural and Computational Biology Program, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales 2010, Australia
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Sárdi É, Stefanovits-Bányai É, Kocsis I, Takács-Hájos M, Fébel H, Blázovics A. Effect of bioactive compounds of table beet cultivars on alimentary induced fatty livers of rats. ACTA ALIMENTARIA 2009. [DOI: 10.1556/aalim.38.2009.3.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ko BK, Ahn HJ, van den Berg F, Lee CH, Hong YS. Metabolomic insight into soy sauce through (1)H NMR spectroscopy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:6862-6870. [PMID: 19591484 DOI: 10.1021/jf901454j] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Soy sauce, a well-known seasoning in Asia and throughout the world, consists of many metabolites that are produced during fermentation or aging and that have various health benefits. However, their comprehensive assessment has been limited due to targeted or instrumentally specific analysis. This paper presents for the first time a metabolic characterization of soy sauce, especially that aged up to 12 years, to obtain a global understanding of the metabolic variations through (1)H NMR spectroscopy coupled with multivariate pattern recognition techniques. Elevated amino acids and organic acids and the consumption of carbohydrate were associated with continuous involvement of microflora in aging for 12 years. In particular, continuous increases in the levels of betaine were found during aging for up to 12 years, demonstrating that microbial- or enzyme-related metabolites were also coupled with osmotolerant or halophilic bacteria present during aging. This work provides global insights into soy sauce through a (1)H NMR-based metabolomic approach that enhances the current understanding of the holistic metabolome and allows assessment of soy sauce quality.
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Affiliation(s)
- Bong-Kuk Ko
- School of Life Science and Biotechnology, Korea University, 5-1 Anam-dong, Sungbuk-gu, Seoul 136-701, Republic of Korea
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Goetz FW, Rise ML, Rise M, Goetz GW, Binkowski F, Shepherd BS. Stimulation of growth and changes in the hepatic transcriptome by 17β-estradiol in the yellow perch (Perca flavescens). Physiol Genomics 2009; 38:261-80. [DOI: 10.1152/physiolgenomics.00069.2009] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The effects of dietary 17β-estradiol (E2) on growth and liver transcriptomics were investigated in the yellow perch ( Perca flavescens). After a 3-mo treatment, E2 significantly stimulated an increase in length and weight of juvenile male and female perch relative to control animals. The increase was significantly greater in females compared with males. Separate, unnormalized cDNA libraries were constructed from equal quantities of RNA from 6 male and 6 female livers of E2-treated and control perch, and 3,546 and 3,719 expressed sequence tags (ESTs) were obtained, respectively. To characterize E2-regulated transcripts, EST frequencies between libraries were calculated within contiguous sequences that were assembled from the combined ESTs of both libraries. Frequencies were also determined in EST transcript groupings produced by aligning all of the ESTs from both libraries at the nucleotide level. From these analyses, there were 28 annotated transcripts that were regulated by 75% between libraries and for which there were at least 5 ESTs of the same transcript between libraries. Regulation of a subset ( 14 ) of these transcripts was confirmed by quantitative reverse transcription-polymerase chain reaction (QPCR). Transcripts that were upregulated by E2 included reproduction-related proteins, binding proteins, and proteases and protease inhibitors. While not part of the transcript frequency analysis, QPCR showed significant upregulation of estrogen receptor esr1 and of insulin-like growth factor I (IGF-I) in E2 livers. E2-downregulated transcripts represented a variety of functional categories including components of the respiratory chain, lipid transport and metabolism, glycolysis, amino acid and nitrogen metabolism, binding proteins, a hydrolytic enzyme, and a transcriptional regulator. In perch it appears that exogenous estrogen drastically shifts liver metabolism toward the production of lipoproteins and carbohydrate binding proteins, and that the growth-promoting action may involve an increase in hepatic IGF-I production.
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Affiliation(s)
- Frederick W. Goetz
- Great Lakes WATER Institute, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Matthew L. Rise
- Great Lakes WATER Institute, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Marlies Rise
- Great Lakes WATER Institute, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Giles W. Goetz
- Great Lakes WATER Institute, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Frederick Binkowski
- Great Lakes WATER Institute, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin
| | - Brian S. Shepherd
- Great Lakes WATER Institute/Agricultural Research Service/U.S. Department of Agriculture, Milwaukee, Wisconsin
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Vanek V, Budesínský M, Kabeleová P, Sanda M, Kozísek M, Hanclová I, Mládková J, Brynda J, Rosenberg I, Koutmos M, Garrow TA, Jirácek J. Structure-activity study of new inhibitors of human betaine-homocysteine S-methyltransferase. J Med Chem 2009; 52:3652-65. [PMID: 19534555 DOI: 10.1021/jm8015798] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Betaine-homocysteine S-methyltransferase (BHMT) catalyzes the transfer of a methyl group from betaine to l-homocysteine, yielding dimethylglycine and l-methionine. In this study, we prepared a new series of BHMT inhibitors. The inhibitors were designed to mimic the hypothetical transition state of BHMT substrates and consisted of analogues with NH, N(CH(3)), or N(CH(3))(2) groups separated from the homocysteine sulfur atom by a methylene, ethylene, or a propylene spacer. Only the inhibitor with the N(CH(3)) moiety and ethylene spacer gave moderate inhibition. This result led us to prepare two inhibitors lacking a nitrogen atom in the S-linked alkyl chain: (RS,RS)-5-(3-amino-3-carboxypropylthio)-3-methylpentanoic acid and (RS)-5-(3-amino-3-carboxypropylthio)-3,3-dimethylpentanoic acid. Both of these compounds were highly potent inhibitors of BHMT. The finding that BHMT does not tolerate a true betaine mimic within these inhibitors, especially the nitrogen atom, is surprising and evokes questions about putative conformational changes of BHMT upon the binding of the substrates/products and inhibitors.
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Affiliation(s)
- Václav Vanek
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo nam. 2, 166 10 Prague 6, Czech Republic
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