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Tűű L, Nas K, Török M, Várbíró S. SHBG Levels Do Not Correlate with Insulin Levels in PCOS with Appropriate Fasting Insulin Sensitivity. J Clin Med 2024; 13:838. [PMID: 38337532 PMCID: PMC10856642 DOI: 10.3390/jcm13030838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024] Open
Abstract
Introduction: There are several phenotypes of polycystic ovarian syndrome (PCOS), and the different phenotypes may differ metabolically. Methods: In the present retrospective study, women with PCOS having normal fasting insulin sensitivity (n = 88) were compared with women with PCOS showing impaired insulin sensitivity (n = 46) using the HPCOS (Hungarian Polycystic ovarian syndrome) database. Results: The impaired insulin sensitivity group has significantly higher body mass index (BMI) and HOMA index than the normal fasting insulin sensitivity group (BMI (kg/m2): 22.0 vs. 28.1, p < 0.0001, HOMA index: 0.96 vs. 2.38, p < 0.0001). The sex hormone binding globulin (SHBG) level was significantly lower, and the free androgen index proved itself significantly higher in the impaired insulin sensitivity group (p < 0.05). Linear regression analysis showed a negative association of BMI with SHBG levels in both groups, while BMI had a positive correlation with insulin concentrations in both groups. However, the SHBG levels were negatively associated with insulin concentrations in the impaired insulin sensitivity group, but this inverse association could not be observed in the normal fasting insulin sensitivity group. Conclusions: The inverse linear correlation of SHBG with HOMA index and serum insulin level is not evident in all PCO syndrome phenotypes, thus SHBG has limited applicability for characterizing carbohydrate metabolism and serum insulin sensitivity.
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Affiliation(s)
- László Tűű
- EndoCare Institute, Endocrinology Center, 1095 Budapest, Hungary; (L.T.); (K.N.)
- School of PhD Studies, Semmelweis University, 1085 Budapest, Hungary
| | - Katalin Nas
- EndoCare Institute, Endocrinology Center, 1095 Budapest, Hungary; (L.T.); (K.N.)
- School of PhD Studies, Semmelweis University, 1085 Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary
- Workgroup of Research Management, Doctoral School, Semmelweis University, 1085 Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary
- Workgroup of Research Management, Doctoral School, Semmelweis University, 1085 Budapest, Hungary
- Department of Obstetrics and Gynecology, University of Szeged, 6725 Szeged, Hungary
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Lőczi LL, Török M, Vezér M, Gerszi D, Gyarmathy VA, Ács N, Várbíró S, Keszthelyi M. Motivators for emergency contraception: Previous pregnancy and condom rupture. Heliyon 2024; 10:e23757. [PMID: 38192856 PMCID: PMC10772218 DOI: 10.1016/j.heliyon.2023.e23757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/02/2023] [Accepted: 12/12/2023] [Indexed: 01/10/2024] Open
Abstract
Objectives Little is known about the motivations to apply for emergency contraception (EC). Our first aim was to explore the motivating circumstances to use EC as fast as possible. Our second aim was to explore the contraceptive method of the population seeking EC. Study design This present retrospective observational study between July 2021 and September 2021 is embedded in the MEEC (Motivation and Epidemiology of Emergency Contraceptive Pill) based on the study cohort of a Hungarian data bank containing follow-up data of 455 women applied for EC telemedicine consultation. Variables assessed were: age, gynecological history (pregnancies, abortions, miscarriages), data of the intercourse (elapsed time, contraceptive method), and data of the menstrual cycle, and relationship status. Results Of all patients, 59.3 % reported condom rupture, 29.5 % no protection, and 11.2 % other. Patients using condom applied for EC significantly sooner than those using no protection and using other protective methods. A significantly shorter elapsed time was observed in patients with a history of a previous pregnancy. No significant relationship was seen between the way of protection, previous pregnancies, and surprisingly the time of ovulation despite the obvious intention of avoiding pregnancy. Conclusions This is the first study to examine the potential role of epidemiologic factors as motivators for EC on the basis of a large patient cohort. Our study demonstrates the significant role of condom rupture/use and the history of previous pregnancies to be the strongest motivators for EC.
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Affiliation(s)
- Lotti Lúcia Lőczi
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői út 78/a, 1082, Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői út 78/a, 1082, Budapest, Hungary
- Workgroup for Science Management Doctoral School, Semmelweis University, Üllői út 22., 1085, Budapest, Hungary
| | - Márton Vezér
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői út 78/a, 1082, Budapest, Hungary
| | - Dóra Gerszi
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői út 78/a, 1082, Budapest, Hungary
| | - V. Anna Gyarmathy
- EpiConsult LLC, 8 The Green, STE A, Dover, DE, 19904, USA
- Johns Hopkins Bloomberg School of Public Health, Baltimore, 615 N Wolfe St, Baltimore, MD, 21205, USA
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői út 78/a, 1082, Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői út 78/a, 1082, Budapest, Hungary
- Workgroup for Science Management Doctoral School, Semmelweis University, Üllői út 22., 1085, Budapest, Hungary
| | - Márton Keszthelyi
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői út 78/a, 1082, Budapest, Hungary
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Erdélyi A, Pálfi E, Tűű L, Nas K, Szűcs Z, Török M, Jakab A, Várbíró S. The Importance of Nutrition in Menopause and Perimenopause-A Review. Nutrients 2023; 16:27. [PMID: 38201856 PMCID: PMC10780928 DOI: 10.3390/nu16010027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/14/2023] [Accepted: 12/19/2023] [Indexed: 01/12/2024] Open
Abstract
Menopause is associated with an increased prevalence of obesity, metabolic syndrome, cardiovascular diseases, and osteoporosis. These diseases and unfavorable laboratory values, which are characteristic of this period in women, can be significantly improved by eliminating and reducing dietary risk factors. Changing dietary habits during perimenopause is most effectively achieved through nutrition counseling and intervention. To reduce the risk factors of all these diseases, and in the case of an already existing disease, dietary therapy led by a dietitian should be an integral part of the treatment. The following review summarizes the recommendations for a balanced diet and fluid intake, the dietary prevention of cardiovascular diseases, the role of sleep, and the key preventive nutrients in menopause, such as vitamin D, calcium, vitamin C, B vitamins, and protein intake. In summary, during the period of perimenopause and menopause, many lifestyle factors can reduce the risk of developing all the diseases (cardiovascular disease, insulin resistance, type 2 diabetes mellitus, osteoporosis, and tumors) and symptoms characteristic of this period.
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Affiliation(s)
- Aliz Erdélyi
- Hungarian Dietetic Association, 1034 Budapest, Hungary; (A.E.); (Z.S.)
- EndoCare Institute, Endocrinology Center, 1037 Budapest, Hungary; (L.T.); (K.N.)
| | - Erzsébet Pálfi
- Faculty of Health Sciences, Department of Dietetics and Nutritional Sciences, Semmelweis University, 1088 Budapest, Hungary
| | - László Tűű
- EndoCare Institute, Endocrinology Center, 1037 Budapest, Hungary; (L.T.); (K.N.)
- School of PhD Studies, Semmelweis University, 1085 Budapest, Hungary
| | - Katalin Nas
- EndoCare Institute, Endocrinology Center, 1037 Budapest, Hungary; (L.T.); (K.N.)
- School of PhD Studies, Semmelweis University, 1085 Budapest, Hungary
| | - Zsuzsanna Szűcs
- Hungarian Dietetic Association, 1034 Budapest, Hungary; (A.E.); (Z.S.)
- School of PhD Studies, Semmelweis University, 1085 Budapest, Hungary
| | - Marianna Török
- EndoCare Institute, Endocrinology Center, 1037 Budapest, Hungary; (L.T.); (K.N.)
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary;
| | - Attila Jakab
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary;
- Department of Obstetrics and Gynecology, University of Szeged, 6725 Szeged, Hungary
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Pintye D, Sziva RE, Biwer LA, Karreci ES, Jacas S, Mastyugin M, Török M, Young BC, Jagtap P, Southan GJ, Jaffe IZ, Zsengellér ZK. A Novel Dual-Function Nitric Oxide Donor Therapy for Preeclampsia-A Proof-of-Principle Study in a Murine Model. Antioxidants (Basel) 2023; 12:2036. [PMID: 38136156 PMCID: PMC10741224 DOI: 10.3390/antiox12122036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/12/2023] [Accepted: 11/15/2023] [Indexed: 12/24/2023] Open
Abstract
Background: Preeclampsia (PE) is a hypertensive disorder of pregnancy that is associated with substantial morbidity and mortality for the mother and fetus. Reduced nitric oxide bioavailability and oxidative stress contribute to the maternal and fetal pathophysiology of PE. In this study, we evaluated the efficacy of a novel dual-function nitric oxide donor/redox modulator, AKT-1005, in reducing PE symptoms in a mouse model of PE. Method: The potential therapeutic effect of AKT-1005 was tested in an animal model of Ad.sFlt-1-induced hypertension, proteinuria and glomerular endotheliosis, a model of PE. Pregnant Ad.sFlt-1-overexpressing CD1 mice were randomized into groups administered AKT-1005 (20 mg/kg) or a vehicle using a minipump on gd11 of pregnancy, and the impact on blood pressure and renal and placental damage were assessed. Results: In healthy female mice, ex vivo treatment of resistance vessels with AKT-1005 induced vasorelaxation, and 6 days of treatment in vivo did not significantly alter blood pressure with or without pregnancy. When given for 6 days during pregnancy along with Ad.sFlt-1-induced PE, AKT-1005 significantly increased plasma nitrate levels and reduced hypertension, renal endotheliosis and plasma cystatin C. In the placenta, AKT-1005 improved placental function, with reduced oxidative stress and increased endothelial angiogenesis, as measured by CD31 staining. As such, AKT-1005 treatment attenuated the Ad.sFlt-1-induced increase in placental and free plasma soluble endoglin expression. Conclusions: These data suggest that AKT-1005 significantly attenuates the sFlt-1-induced PE phenotypes by inhibiting oxidative stress, the anti-angiogenic response, and increasing NO bioavailability. Additional research is warranted to investigate the role of AKT-1005 as a novel therapeutic agent for vascular disorders such as preeclampsia.
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Affiliation(s)
- Diana Pintye
- Department of Medicine, Beth Israel Lahey Health, Boston, MA 02215, USA; (D.P.); (E.S.K.); (S.J.)
| | - Réka E. Sziva
- Department of Obstetrics and Gynecology, Semmelweis University, 1085 Budapest, Hungary;
| | - Lauren A. Biwer
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA 02111, USA; (L.A.B.); (I.Z.J.)
| | - Esilida Sula Karreci
- Department of Medicine, Beth Israel Lahey Health, Boston, MA 02215, USA; (D.P.); (E.S.K.); (S.J.)
| | - Sonako Jacas
- Department of Medicine, Beth Israel Lahey Health, Boston, MA 02215, USA; (D.P.); (E.S.K.); (S.J.)
| | - Maxim Mastyugin
- Department of Chemistry, UMass Boston, Boston, MA 02125, USA; (M.M.); (M.T.)
| | - Marianna Török
- Department of Chemistry, UMass Boston, Boston, MA 02125, USA; (M.M.); (M.T.)
| | - Brett C. Young
- Department of OB/GYN, Beth Israel Lahey Health, Boston, MA 02215, USA;
| | - Prakash Jagtap
- Akkadian Therapeutics, Stoneham, MA 02180, USA; (P.J.); (G.J.S.)
| | - Garry J. Southan
- Akkadian Therapeutics, Stoneham, MA 02180, USA; (P.J.); (G.J.S.)
| | - Iris Z. Jaffe
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA 02111, USA; (L.A.B.); (I.Z.J.)
| | - Zsuzsanna K. Zsengellér
- Department of Medicine, Beth Israel Lahey Health, Boston, MA 02215, USA; (D.P.); (E.S.K.); (S.J.)
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Süli A, Magyar P, Vezér M, Bányai B, Szekeres M, Sipos M, Mátrai M, Hetthéssy JR, Dörnyei G, Ács N, Horváth EM, Nádasy GL, Várbíró S, Török M. Effects of Gender and Vitamin D on Vascular Reactivity of the Carotid Artery on a Testosterone-Induced PCOS Model. Int J Mol Sci 2023; 24:16577. [PMID: 38068901 PMCID: PMC10706740 DOI: 10.3390/ijms242316577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/15/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023] Open
Abstract
The negative cardiovascular effects of polycystic ovary syndrome (PCOS) and vitamin D deficiency (VDD) have been discussed previously; however, the sex differences between PCOS females and males are not yet known. Our aim was to investigate the effect of PCOS and VDD in the carotid artery of male and female Wistar rats. Females were treated with transdermal testosterone (Androgel) for 8 weeks, which caused PCOS. VDD and vitamin D supplementation were accomplished via diet. The carotid arteries' contraction and relaxation were examined using myography. Receptor density was investigated using immunohistochemistry. In PCOS females, angiotensin receptor density, angiotensin II-induced contraction, androgen receptor optical density, and testosterone-induced relaxation increased. The increased contractile response may increase cardiovascular vulnerability in women with PCOS. As an effect of VDD, estrogen receptor density increased in all our groups, which probably compensated for the reduced relaxation caused by VDD. Testosterone-induced relaxation was decreased as a result of VDD in males and non-PCOS females, whereas this reduction was absent in PCOS females. Male sex is associated with increased contraction ability compared with non-PCOS and PCOS females. VDD and Androgel treatment show significant gender differences in their effects on carotid artery reactivity. Both VDD and PCOS result in a dysfunctional vascular response, which can contribute to cardiovascular diseases.
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Affiliation(s)
- Anita Süli
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary; (A.S.); (M.S.); (N.Á.); (S.V.)
| | - Péter Magyar
- Medical Imaging Centre, Faculty of Medicine, Semmelweis University, 1082 Budapest, Hungary;
| | - Márton Vezér
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary; (A.S.); (M.S.); (N.Á.); (S.V.)
| | - Bálint Bányai
- Department of Physiology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (B.B.); (M.S.); (E.M.H.); (G.L.N.)
| | - Mária Szekeres
- Department of Physiology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (B.B.); (M.S.); (E.M.H.); (G.L.N.)
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 1088 Budapest, Hungary;
| | - Miklós Sipos
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary; (A.S.); (M.S.); (N.Á.); (S.V.)
| | - Máté Mátrai
- Institute of Translational Medicine, Semmelweis University, 1094 Budapest, Hungary;
| | - Judit Réka Hetthéssy
- Workgroup of Research Management, Doctoral School, Semmelweis University, 1085 Budapest, Hungary;
| | - Gabriella Dörnyei
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, 1088 Budapest, Hungary;
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary; (A.S.); (M.S.); (N.Á.); (S.V.)
| | - Eszter Mária Horváth
- Department of Physiology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (B.B.); (M.S.); (E.M.H.); (G.L.N.)
| | - György L. Nádasy
- Department of Physiology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (B.B.); (M.S.); (E.M.H.); (G.L.N.)
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary; (A.S.); (M.S.); (N.Á.); (S.V.)
- Workgroup of Research Management, Doctoral School, Semmelweis University, 1085 Budapest, Hungary;
- Department of Obstetrics and Gynecology, University of Szeged, 6725 Szeged, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary; (A.S.); (M.S.); (N.Á.); (S.V.)
- Workgroup of Research Management, Doctoral School, Semmelweis University, 1085 Budapest, Hungary;
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Lőczi L, Vezér M, Török M, Cseh R, Keszthelyi A, Ács N, Várbíró S, Keszthelyi M. [Emergency contraception.]. Orv Hetil 2023; 164:1736-1748. [PMID: 37930357 DOI: 10.1556/650.2023.32757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 07/06/2023] [Indexed: 11/07/2023]
Abstract
INTRODUCTION Emergency contraception is an effective and safe solution for preventing unwanted pregnancies. Many methods of emergency contraception are used, which have different mechanisms of action and time frames. OBJECTIVE Providing information to healthcare professionals and decision-makers based on the literature data about the target populations of emergency contraception, evidence-based modern methods, their effectiveness, and practical application for the purpose of reducing the incidence of unintended pregnancies. METHODS We conducted a systematic literature search in MEDLINE (PubMed), Embase and Scopus databases based on relevant keywords, for publications that were published between 1960 and 2023. RESULTS 23 clinical professional publications were selected that examined the effectiveness of oral and long-term usable contraceptives as emergency contraceptives. Our research results were interpreted in terms of weight, breastfeeding, time elapsed since the intercourse and future contraceptive plans, which help to select the most appropriate emergency contraceptive for healthcare professionals. CONCLUSION Based on the literature data, our systematic review provides assistance for choosing between the available oral levonorgestrel, ulipristal acetate, and intrauterine contraceptive devices available in Hungary based on effectiveness, target population, and accessibility. We support the healthcare governance in creating up-to-date professional guidelines to improve the availability of emergency contraception and, consequently, enhance reproductive health. Orv Hetil. 2023; 164(44): 1736-1748.
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Affiliation(s)
- Lotti Lőczi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/a, 1082 Magyarország
| | - Márton Vezér
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/a, 1082 Magyarország
| | - Marianna Török
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/a, 1082 Magyarország
| | - Richárd Cseh
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/a, 1082 Magyarország
| | - Attila Keszthelyi
- 2 Semmelweis Egyetem, Általános Orvostudományi Kar, Urológiai Klinika Budapest Magyarország
| | - Nándor Ács
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/a, 1082 Magyarország
| | - Szabolcs Várbíró
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/a, 1082 Magyarország
| | - Márton Keszthelyi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/a, 1082 Magyarország
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Vernooij RW, Hockham C, Barth C, Canaud B, Cromm K, Davenport A, Hegbrant J, Rose M, Strippoli G, Török M, Woodward M, Bots M, Blankestijn P. High-Target Hemodiafiltration Convective Dose Achieved in Most Patients in a 6-Month Intermediary Analysis of the CONVINCE Randomized Controlled Trial. Kidney Int Rep 2023; 8:2276-2283. [PMID: 38025213 PMCID: PMC10658200 DOI: 10.1016/j.ekir.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 07/28/2023] [Accepted: 08/07/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction High convection volumes in hemodiafiltration (HDF) result in improved survival; however, it remains unclear whether it is achievable in all patients. Methods CONVINCE, a randomized controlled trial, randomized patients with end-stage kidney disease 1:1 to high-dose HDF versus high-flux hemodialysis (HD) continuation. We evaluated the proportion of patients achieving high-dose HDF target: convection volume per visit of ≥23 l (range ±1 l) at baseline, month 3, and month 6. We compared baseline characteristics in the following 2 ways: (i) patients on target for all 3 visits versus patients who missed target on ≥1 visits and (ii) patients on target for all 3 visits or missing it once versus patients who missed target on ≥2 visits. Results A total of 653 patients were randomized to HDF. Their mean age was 62.2 (SD 13.5) years, 36% were female, 81% had fistula vascular access, and 33% had diabetes. Across the 3 visits, 75 patients (11%), 27 patients (4%), and 11 patients (2%) missed the convection volume target once, twice, and thrice, respectively. Apart from diabetes, there were no apparent differences in patient characteristics between patients who always achieved the high-dose target (83%) and those who missed the target either once or more (17%) or twice or more (6%). Conclusion Achieving high-dose HDF is feasible for nearly all patients in CONVINCE and could be maintained during the 6-month follow-up period. Apart from diabetes, there were no other indications for confounding by indication on multivariable analyses that may explain the potential survival advantage for patients receiving high-dose HDF.
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Affiliation(s)
- Robin W.M. Vernooij
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - C. Hockham
- George Institute for Global Health, School of Public Health, Imperial College London, London, UK
| | - C. Barth
- B. Braun Avitum AG, Medical Scientific Affairs, Melsungen, Germany
| | - B. Canaud
- Montpellier University, School of Medicine, Montpellier, France and Global Medical Office, FMC Deutschland, Bad Homburg, Germany
| | - K. Cromm
- Fresenius Medical Care Deutschland GmbH, Global Medical Office, Bad Homburg, Germany
| | - A. Davenport
- UCL Center for Nephrology, Royal Free Hospital, Division of Medicine, University College London, London, UK
| | - J. Hegbrant
- Division of Nephrology, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - M. Rose
- Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Center of Internal Medicine and Dermatology, Department of Psychosomatic Medicine, Berlin Institute of Health, Berlin, Germany
| | - G.F.M. Strippoli
- Department of Precision and Regenerative Medicine and Ionian Area, University of Bari, Bari, Italy
- School of Public Health, University of Sydney, Sydney, Australia
| | - M. Török
- Corporate Medical Office Diaverum, Malmö, Sweden
| | - M. Woodward
- George Institute for Global Health, School of Public Health, Imperial College London, London, UK
- The George Institute for Global Health, University of New South Wales, Sydney, Australia
| | - M.L. Bots
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - P.J. Blankestijn
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
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Gerszi D, Orosz G, Török M, Szalay B, Karvaly G, Orosz L, Hetthéssy J, Vásárhelyi B, Török O, Horváth EM, Várbíró S. Risk Estimation of Gestational Diabetes Mellitus in the First Trimester. J Clin Endocrinol Metab 2023; 108:e1214-e1223. [PMID: 37247379 PMCID: PMC10584002 DOI: 10.1210/clinem/dgad301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 05/05/2023] [Accepted: 05/24/2023] [Indexed: 05/31/2023]
Abstract
CONTEXT There is no early, first-trimester risk estimation available to predict later (gestational week 24-28) gestational diabetes mellitus (GDM); however, it would be beneficial to start an early treatment to prevent the development of complications. OBJECTIVE We aimed to identify early, first-trimester prediction markers for GDM. METHODS The present case-control study is based on the study cohort of a Hungarian biobank containing biological samples and follow-up data from 2545 pregnant women. Oxidative-nitrative stress-related parameters, steroid hormone, and metabolite levels were measured in the serum/plasma samples collected at the end of the first trimester from 55 randomly selected control and 55 women who developed GDM later. RESULTS Pregnant women who developed GDM later during the pregnancy were older and had higher body mass index. The following parameters showed higher concentration in their serum/plasma samples: fructosamine, total antioxidant capacity, testosterone, cortisone, 21-deoxycortisol; soluble urokinase plasminogen activator receptor, dehydroepiandrosterone sulfate, dihydrotestosterone, cortisol, and 11-deoxycorticosterone levels were lower. Analyzing these variables using a forward stepwise multivariate logistic regression model, we established a GDM prediction model with a specificity of 96.6% and sensitivity of 97.5% (included variables: fructosamine, cortisol, cortisone, 11-deoxycorticosterone, SuPAR). CONCLUSION Based on these measurements, we accurately predict the development of later-onset GDM (24th-28th weeks of pregnancy). Early risk estimation provides the opportunity for targeted prevention and the timely treatment of GDM. Prevention and slowing the progression of GDM result in a lower lifelong metabolic risk for both mother and offspring.
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Affiliation(s)
- Dóra Gerszi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Budapest H-1082, Hungary
- Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest H-1094, Hungary
| | - Gergő Orosz
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen Medical and Health Science Centre, Debrecen H-4032, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Budapest H-1082, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Budapest H-1085, Hungary
| | - Balázs Szalay
- Department of Laboratory Medicine, Semmelweis University, Budapest H-1083, Hungary
| | - Gellért Karvaly
- Laboratory of Mass Spectrometry and Separation Technology, Department of Laboratory Medicine, Semmelweis University, Budapest H-1089, Hungary
| | - László Orosz
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen Medical and Health Science Centre, Debrecen H-4032, Hungary
| | - Judit Hetthéssy
- Workgroup for Science Management, Doctoral School, Semmelweis University, Budapest H-1085, Hungary
| | - Barna Vásárhelyi
- Department of Laboratory Medicine, Semmelweis University, Budapest H-1083, Hungary
| | - Olga Török
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Debrecen Medical and Health Science Centre, Debrecen H-4032, Hungary
| | - Eszter M Horváth
- Department of Physiology, Faculty of Medicine, Semmelweis University, Budapest H-1094, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Budapest H-1082, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Budapest H-1085, Hungary
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9
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Pintye D, Sziva RE, Mastyugin M, Young BC, Jacas S, Török M, Salahuddin S, Jagtap P, Southan GJ, Zsengellér ZK. A Novel Dual-Function Redox Modulator Relieves Oxidative Stress and Anti-Angiogenic Response in Placental Villus Explant Exposed to Hypoxia-Relevance for Preeclampsia Therapy. Biology (Basel) 2023; 12:1229. [PMID: 37759628 PMCID: PMC10525611 DOI: 10.3390/biology12091229] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/07/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Preeclampsia (PE) is a severe, life-threatening complication during pregnancy (~5-7%), and no causative treatment is available. Early aberrant spiral artery remodeling is associated with placental stress and the release of oxygen radicals and other reactive oxygen species (ROS) in the placenta. This precedes the production of anti-angiogenic factors, which ultimately leads to endothelial and trophoblast damage and the key features of PE. We tested whether a novel dual-function redox modulator-AKT-1005-can effectively reduce placental oxidative stress and alleviate PE symptoms in vitro. METHOD Isolated human villous explants were exposed to hypoxia and assessed to determine whether improving cell-redox function with AKT-1005 diminished ROS production, mitochondrial stress, production of the transcription factor HIF1A, and downstream anti-angiogenic responses (i.e., sFLT1, sEng production). MitoTEMPO was used as a reference antioxidant. RESULTS In our villous explant assays, pretreatment with AKT-1005 reduced mitochondrial-derived ROS production, reduced HIF-1A, sFLT1, and sEng protein expression, while increasing VEGF in hypoxia-exposed villous trophoblast cells, with better efficiency than MitoTEMPO. In addition, AKT-1005 improved mitochondrial electron chain enzyme activity in the stressed explant culture. CONCLUSIONS The redox modulator AKT-1005 has the potential to intervene with oxidative stress and can be efficacious for PE therapy. Future studies are underway to assess the in vivo efficacy of HMP.
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Affiliation(s)
- Diana Pintye
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.)
| | - Réka E. Sziva
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.)
- Department of Obstetrics and Gynecology, Semmelweis University, 1082 Budapest, Hungary
| | - Maxim Mastyugin
- Department of Chemistry, University of Massachusetts, Boston, MA 02125, USA; (M.M.); (M.T.)
| | - Brett C. Young
- Department of Obstetrics and Gynecology, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (B.C.Y.); (S.S.)
| | - Sonako Jacas
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.)
| | - Marianna Török
- Department of Chemistry, University of Massachusetts, Boston, MA 02125, USA; (M.M.); (M.T.)
| | - Saira Salahuddin
- Department of Obstetrics and Gynecology, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (B.C.Y.); (S.S.)
| | | | | | - Zsuzsanna K. Zsengellér
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.)
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10
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Pintye D, Sziva RE, Mastyugin M, Török M, Jacas S, Lo A, Salahuddin S, Zsengellér ZK. Nitroxide-HMP-Protects Human Trophoblast HTR-8/SVneo Cells from H 2O 2-Induced Oxidative Stress by Reducing the HIF1A Signaling Pathway. Antioxidants (Basel) 2023; 12:1578. [PMID: 37627573 PMCID: PMC10451835 DOI: 10.3390/antiox12081578] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/27/2023] [Accepted: 08/02/2023] [Indexed: 08/27/2023] Open
Abstract
Preeclampsia (PE) is a pregnancy-specific syndrome affecting 5-7% of patients. There is no effective treatment available. Early abnormal placental development is associated with oxidative stress (OS) and a release of reactive oxygen species (ROS) in the placenta. This phenomenon leads to downstream signaling, Hypoxia Inducible Factor 1A (HIF1A) stabilization and transcription of the anti-angiogenic factors soluble fms-like tyrosine kinase 1 (sFLT1) and soluble endoglin (sEng), which are known to cause endothelial and trophoblast dysfunction and cardinal features of PE: hypertension, proteinuria and, in severe cases, eclampsia. We tested whether 3-(Hydroxymethyl)-1-oxy-2,2,5,5-tetramethylpyrrolidine (HMP)-a nitroxide-type antioxidant molecule-can reduce placental OS and mitigate PE symptoms in vitro. We induced OS in human trophoblast (HTR-8/SVneo) cells with hydrogen peroxide (H2O2) and assessed whether modulating cell redox function with HMP reduces cell injury, mitochondrial stress and HIF1A and sFLT1 production. Pre-treatment with HMP reduced mitochondrial-derived ROS production, restored LC3B expression and reduced HIF1A and sFLT1 expression in H2O2-exposed HTR-8/SVneo trophoblast cells. HMP improved the mitochondrial electron chain enzyme activity, indicating that a reduction in OS alleviates mitochondrial stress and also reduces anti-angiogenic responses. In reducing placental trophoblast OS, HMP presents a potential novel therapeutic approach for the treatment of PE. Future investigation is warranted regarding the in vivo use of HMP.
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Affiliation(s)
- Diana Pintye
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.); (A.L.)
| | - Réka Eszter Sziva
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.); (A.L.)
- Department of Obstetrics and Gynecology, Semmelweis University, 1085 Budapest, Hungary
| | - Maxim Mastyugin
- Department of Chemistry, University of Massachusetts, Boston, MA 02125, USA; (M.M.); (M.T.)
| | - Marianna Török
- Department of Chemistry, University of Massachusetts, Boston, MA 02125, USA; (M.M.); (M.T.)
| | - Sonako Jacas
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.); (A.L.)
| | - Agnes Lo
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.); (A.L.)
| | - Saira Salahuddin
- Department of Obstetrics and Gynecology, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA;
| | - Zsuzsanna K. Zsengellér
- Department of Medicine, Beth Israel Lahey Health, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA; (D.P.); (S.J.); (A.L.)
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11
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Keszthelyi M, Leipold G, Lőczi L, Török M, Ács N, Várbíró S. [Herniated amniotic sac through uterine dehiscence at the 30th gestational week after prior laparoscopic salpingectomy]. Orv Hetil 2023; 164:988-992. [PMID: 37356016 DOI: 10.1556/650.2023.32776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 03/27/2023] [Indexed: 06/27/2023]
Abstract
Uterine rupture is a rare complication during pregnancy which may even lead to the death of the mother and the fetus. In this report, the management of a herniated amniotic sac associated with uterine dehiscence is presented. A 25-year-old primigravida at 30 weeks with a history of a previous unilateral salpingectomy was transferred to our hospital with the potential diagnosis of a herniated amniotic sac, which was discovered during a routine ultrasound scan. The patient had no prior complaints or any other signs that would have indicated a serious condition during her pregnancy. She underwent an emergency cesarean section and a two-layer closure of the lesion. An adequate suture during laparoscopic salpingectomy provides prevention of uterine rupture during subsequent pregnancies. A medical history with a previous laparoscopic dehiscence should necessitate a more frequent sonographic observation during pregnancy. Orv Hetil. 2023; 164(25): 988-992.
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Affiliation(s)
- Márton Keszthelyi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Gergő Leipold
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Lotti Lőczi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Marianna Török
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Nándor Ács
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Szabolcs Várbíró
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
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12
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Vezér M, Jósvai A, Bányai B, Ács N, Keszthelyi M, Soltész-Katona E, Szekeres M, Oláh A, Radovits T, Merkely B, Horváth EM, Nádasy GL, Török M, Várbíró S. Impact of Sex and Exercise on Femoral Artery Function: More Favorable Adaptation in Male Rats. Life (Basel) 2023; 13:life13030778. [PMID: 36983932 PMCID: PMC10058998 DOI: 10.3390/life13030778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/18/2023] Open
Abstract
Blood flow increases in arteries of the skeletal muscles involved in active work. Our aim was to investigate the gender differences as a result of adaptation to sport in the femoral arteries. Vascular reactivity and histology of animals were compared following a 12-week swimming training. Animals were divided into sedentary male (MS), trained male (MTr), sedentary female (FS), and trained female (FTr) groups. Isolated femoral artery rings were examined by wire myography. Contraction induced by phenylephrine (Phe) did not differ between the four groups. The contractile ability in the presence of indomethacin (INDO) was decreased in both sedentary groups. However, we found a specific cyclooxygenase-2 (COX-2) role only in FS rats. After exercise training, we observed increased vasoconstriction in both sexes, when nitro-L-arginine methyl ester (L-NAME) was present. The COX-dependent vasoconstriction effect disappeared in MTr animals, and the COX-2-dependent vasoconstriction effect disappeared in FTr ones. Relaxation was reduced significantly, when L-NAME was present in MTr animals compared to in FTr rats. The training was associated with greater endothelial nitric oxide synthase (eNOS) protein expression in males, but not in females. The present study proves that there are gender differences regarding adaptation mechanisms of musculocutaneous arteries to sports training. In males, relaxation reserve capacity was markedly elevated compared to in females.
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Affiliation(s)
- Márton Vezér
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Attila Jósvai
- Department of Neurosurgery, Military Hospital, Róbert Károly Round 44, 1134 Budapest, Hungary
| | - Bálint Bányai
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
| | - Márton Keszthelyi
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
| | - Eszter Soltész-Katona
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Mária Szekeres
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, Vas Street 17, 1085 Budapest, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Városmajor Street 68, 1085 Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Városmajor Street 68, 1085 Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Városmajor Street 68, 1085 Budapest, Hungary
| | - Eszter M. Horváth
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - György L. Nádasy
- Department of Physiology, Semmelweis University, Tűzoltó Street 37-47, 1085 Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
- Correspondence: (M.T.); (S.V.); Tel.: +36-1-459-1500 (S.V.); Fax: +36-1-333-4934 (S.V.)
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői Street 78/a, 1082 Budapest, Hungary
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
- Correspondence: (M.T.); (S.V.); Tel.: +36-1-459-1500 (S.V.); Fax: +36-1-333-4934 (S.V.)
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13
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Keszthelyi M, Bakos M, Szabó I, Török M, Lőczi L, Madaras L, Ács N, Várbíró S. [Molar pregnancy in postmenopause]. Orv Hetil 2023; 164:273-277. [PMID: 36806108 DOI: 10.1556/650.2023.32704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 12/11/2022] [Indexed: 02/23/2023]
Abstract
Hydatidiform mole is an extremely rare gestational trophoblastic disease. The pathogenesis is unique in that the maternal tumor arises from pregnancy tissue. In terms of occurrence, it mainly affects women of reproductive age. In our case report, a 53-year-old female patient was diagnosed with molar pregnancy as the background of her perimenopausal bleeding disorder. Mola is a high-risk disease because the symptoms can be deceiving and may be very similar to those of an incomplete miscarriage, ectopic pregnancy or perimenopausal bleeding. Appropriate diagnosis is key to terminating the pregnancy as soon as possible. The purpose of our case report is to draw attention to the atypical appearance of molar pregnancy; in relation to our perimenopausal female patient, we review the basic principles of treatment of hydatidiform mole and present the diagnostic and therapeutic management of a successfully completed case. Orv Hetil. 2023; 164(7): 273-277.
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Affiliation(s)
- Márton Keszthelyi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Marcell Bakos
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - István Szabó
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Marianna Török
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Lotti Lőczi
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Lilla Madaras
- 2 Semmelweis Egyetem, Általános Orvostudományi Kar, Patológiai, Igazságügyi és Biztosítási Orvostani Intézet Budapest Magyarország
| | - Nándor Ács
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
| | - Szabolcs Várbíró
- 1 Semmelweis Egyetem, Általános Orvostudományi Kar, Szülészeti és Nőgyógyászati Klinika Budapest, Üllői út 78/A, 1082 Magyarország
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14
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Charlton NC, Mastyugin M, Török B, Török M. Structural Features of Small Molecule Antioxidants and Strategic Modifications to Improve Potential Bioactivity. Molecules 2023; 28:molecules28031057. [PMID: 36770724 PMCID: PMC9920158 DOI: 10.3390/molecules28031057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 01/21/2023] Open
Abstract
This review surveys the major structural features in various groups of small molecules that are considered to be antioxidants, including natural and synthetic compounds alike. Recent advances in the strategic modification of known small molecule antioxidants are also described. The highlight is placed on changing major physicochemical parameters, including log p, bond dissociation energy, ionization potential, and others which result in improved antioxidant activity.
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15
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Affiliation(s)
- Marianna Török
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, 02125, USA.
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16
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Jósvai A, Török M, Hetthéssy J, Mátrai M, Monori-Kiss A, Makk J, Vezér M, Sára L, Szabó I, Székács B, Nádasy GL, Várbíró S. Additive damage in the thromboxane related vasoconstriction and bradykinin relaxation of intramural coronary resistance arterioles in a rodent model of andropausal hypertension. Heliyon 2022; 8:e11533. [PMID: 36406706 PMCID: PMC9667244 DOI: 10.1016/j.heliyon.2022.e11533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 04/17/2022] [Accepted: 11/04/2022] [Indexed: 11/13/2022] Open
Abstract
Hypertension and andropause both accelerate age–related vascular deterioration. We aimed to evaluate the effects of angiotensin-II induced hypertension and deficiency of testosterone combined regarding the resistance coronaries found intramurally. Four male groups were formed from the animals: control group (Co, n = 10); the group that underwenr orchidectomy (ORC, n = 13), those that received an infusion of angiotensin-II (AII, n = 10) and a grous that received AII infusion and were also surgically orchidectomized (AII + ORC, n = 8). AII and AII + ORC animals were infused with infusing angiotensin-II (100 ng/min/kg) using osmotic minipumps. Orchidectomy was perfomed in the ORC and the AII + ORC groupsto establish deficiency regarding testosterone. Following four weeks of treatment, pressure-arteriography was performed in vitro, and the tone induced by administration of thromboxane-agonist (U46619) and bradykinin during analysis of the intramural coronaries (well-known to be resistance arterioles) was studied. U46619-induced vasoconstriction poved to be significantly decreased in the ORC and AII + ORC groups when compared with Co and AII animals. In ORC and AII + ORC groups, the bradykinin-induced relaxation was also significantly reduced to a greater extent compared to Co and AII rats. Following orchidectomy, the vasocontraction and vasodilatation capacity of blood vessels is reduced. The effect of testosterone deficiency on constrictor tone and relaxation remains pronounced even in AII hypertension: testosterone deficiency further narrows adaptation range in the double noxa (AII + ORC) group. Our studies suggest that vascular changes caused by high blood pressure and testosterone deficiency together may significantly increase age-related cardiovascular risk.
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Affiliation(s)
- Attila Jósvai
- Doctoral School of Theoretical and Translational Medicine, Semmelweis University, Budapest, Hungary
- Department of Neurosurgery, Hungarian Defense Forces Medical Centre, Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
- Workgroup of Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
- Corresponding author.
| | - Judit Hetthéssy
- Workgroup of Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
- Department of Orthopedics, Semmelweis University, Budapest, Hungary
| | - Máté Mátrai
- Institute of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Jennifer Makk
- Institute of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Márton Vezér
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Levente Sára
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - István Szabó
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Béla Székács
- Department Internal Medicine, Department Section of Geriatrics, Szt Imre Teaching Hospital, Budapest, Hungary
| | - György L. Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
- Workgroup of Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
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17
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Vezer M, Demeter Á, Szekeres M, Jósvai A, Bányai B, Oláh A, Balogh F, Horváth EM, Radovits T, Merkely B, Ács N, Nádasy GL, Török M, Várbiró S. Sex differences in rat renal arterial responses following exercise training. Am J Physiol Heart Circ Physiol 2022; 322:H310-H318. [PMID: 34995166 DOI: 10.1152/ajpheart.00398.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
During aerobic exercise, hemodynamic alterations occure; while blood flow in skeletal muscle arteries increases, it decreases in visceral vessels due to mesenterial vasoconstriction. However, maintaining renal blood flow during intensive sport is also a priority. Our aim was to investigate the changes of vascular reactivity and histology of isolated renal artery of male and female rats in response to swim-training. Wistar rats were distributed into four groups: male sedentary (MSed), male trained (MTr), female sedentary (FSed), and female trained (FTr). Trained animals underwent a 12-week-long intensive swimming program. Vascular function of isolated renal artery segments was examined by wire myography. Phenylephrine-induced contraction was lower in FSed compared to MSed animals, and it was decreased by training in male but not in female animals. Inhibition of cyclooxygenases by indomethacin reduced contraction in both sedentary groups, and in MTr but not in FTr animals. Inhibition of nitric oxide production increased contraction in both trained groups. Acetylcholine induced relaxation was similar in all experimental groups showing predominant NO-dependency. Elastin and smooth muscle cell actin density was reduced in female rats after aerobic training. This study shows that, as a result of 12-weeks-long training, there are sex differences in renal arterial responses following exercise training. Swimming moderates renal artery vasoconstriction in male animals, while it depresses elastic fiber and smooth muscle actin density in females.
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Affiliation(s)
- Marton Vezer
- Department of Obstetrics and Gynaecology, Semmelweis University, Budapest, Hungary.,Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Ágota Demeter
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Maria Szekeres
- Department of Physiology, Semmelweis University, Budapest, Hungary.,Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, Hungary
| | - Attila Jósvai
- Department of Neurosurgery, Military Hospital, Budapest, Hungary
| | - Bálint Bányai
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Attila Oláh
- Heart and Vascular Centre, Semmelweis University, Budapest, Hungary
| | - Fruzsina Balogh
- Faculty of Electrical Engineering and Informatics, Technical University Budapest, Budapest, Hungary
| | - Eszter M Horváth
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Centre, Semmelweis University, Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Centre, Semmelweis University, Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynaecology, Semmelweis University, Budapest, Hungary
| | - György L Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynaecology, Semmelweis University, Budapest, Hungary.,Workgroup for Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbiró
- Department of Obstetrics and Gynaecology, Semmelweis University, Budapest, Hungary.,Workgroup for Science Management, Doctoral School, Semmelweis University, Budapest, Hungary
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18
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Sipos M, Gerszi D, Dalloul H, Bányai B, Sziva RE, Kollarics R, Magyar P, Török M, Ács N, Szekeres M, Nádasy GL, Hadjadj L, Horváth EM, Várbíró S. Vitamin D Deficiency and Gender Alter Vasoconstrictor and Vasodilator Reactivity in Rat Carotid Artery. Int J Mol Sci 2021; 22:ijms22158029. [PMID: 34360792 PMCID: PMC8347553 DOI: 10.3390/ijms22158029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/19/2021] [Accepted: 07/22/2021] [Indexed: 01/07/2023] Open
Abstract
The vitamin-D-sensitivity of the cardiovascular system may show gender differences. The prevalence of vitamin D (VD) deficiency (VDD) is high, and it alters cardiovascular function and increases the risk of stroke. Our aim was to investigate the vascular reactivity and histological changes of isolated carotid artery of female and male rats in response to different VD supplies. A total of 48 male and female Wistar rats were divided into four groups: female VD supplemented, female VDD, male VD supplemented, male VDD. The vascular function of isolated carotid artery segments was examined by wire myography. Both vitamin D deficiency and male gender resulted in increased phenylephrine-induced contraction. Acetylcholine-induced relaxation decreased in male rats independently from VD status. Inhibition of prostanoid signaling by indomethacin reduced contraction in females, but increased relaxation ability in male rats. Functional changes were accompanied by VDD and gender-specific histological alterations. Elastic fiber density was significantly decreased by VDD in female rats, but not in males. Smooth muscle actin and endothelial nitric oxide synthase levels were significantly lowered, but the thromboxane receptor was elevated in VDD males. Decreased nitrative stress was detected in both male groups independently from VD supply. The observed interactions between vitamin D deficiency and sex may play a role in the gender difference of cardiovascular risk.
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Affiliation(s)
- Miklós Sipos
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
| | - Dóra Gerszi
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Hicham Dalloul
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
| | - Bálint Bányai
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Réka Eszter Sziva
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
- Correspondence:
| | - Réka Kollarics
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Péter Magyar
- Medical Imaging Centre, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary;
| | - Marianna Török
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
| | - Mária Szekeres
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
- Department of Morphology and Physiology, Faculty of Health Sciences, Semmelweis University, Vas Street 17, 1088, Budapest, Hungary
| | - György L. Nádasy
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Leila Hadjadj
- Department of Translational Medicine, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary;
| | - Eszter Mária Horváth
- Department of Physiology, Faculty of Medicine, Semmelweis University, Tűzoltó Street 37-47, 1094 Budapest, Hungary; (B.B.); (M.S.); (G.L.N.); (E.M.H.)
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Faculty of Medicine, Semmelweis University, Üllői Street 78/a, 1083 Budapest, Hungary; (M.S.); (D.G.); (H.D.); (R.K.); (M.T.); (N.Á.); (S.V.)
- Workgroup for Science Management, Doctoral School, Semmelweis University, Üllői Street 22, 1085 Budapest, Hungary
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19
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Merkely P, Bakos M, Bányai B, Monori-Kiss A, Horváth EM, Bognár J, Benkő R, Oláh A, Radovits T, Merkely B, Ács N, Nádasy GL, Török M, Várbíró S. Sex Differences in Exercise-Training-Related Functional and Morphological Adaptation of Rat Gracilis Muscle Arterioles. Front Physiol 2021; 12:685664. [PMID: 34322036 PMCID: PMC8313298 DOI: 10.3389/fphys.2021.685664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/17/2021] [Indexed: 12/17/2022] Open
Abstract
Background The cardiovascular effects of training have been widely investigated; however, few studies have addressed sex differences in arteriolar adaptation. In the current study, we examined the adaptation of the gracilis arterioles of male and female rats in response to intensive training. Methods Wistar rats were divided into four groups: male exercise (ME) and female exercise (FE) animals that underwent a 12-week intensive swim-training program (5 days/week, 200 min/day); and male control (MC) and female control (FC) animals that were placed in water for 5 min daily. Exercise-induced cardiac hypertrophy was confirmed by echocardiography. Following the training, the gracilis muscle arterioles were prepared, and their biomechanical properties and functional reactivity were tested, using pressure arteriography. Collagen and smooth muscle remodeling were observed in the histological sections. Results Left ventricular mass was elevated in both sexes in response to chronic training. In the gracilis arterioles, the inner radius and wall tension increased in female animals, and the wall thickness and elastic modulus were reduced in males. Myogenic tone was reduced in the ME group, whereas norepinephrine-induced vasoconstriction was elevated in the FE group. More pronounced collagen staining was observed in the ME group than in the MC group. Relative hypertrophy and tangential stress of the gracilis arterioles were higher in females than in males. The direct vasoconstriction induced by testosterone was lower in females and was reduced as an effect of exercise in males. Conclusion The gracilis muscle arteriole was remodeled as a result of swim training, and this adaptation was sex dependent.
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Affiliation(s)
- Petra Merkely
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Marcell Bakos
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Bálint Bányai
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Eszter M Horváth
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Judit Bognár
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary.,Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Rita Benkő
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - György L Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
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20
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Török M, Merkely P, Monori-Kiss A, Horváth EM, Sziva RE, Péterffy B, Jósvai A, Sayour AA, Oláh A, Radovits T, Merkely B, Ács N, Nádasy GL, Várbíró S. Correction to: Network analysis of the left anterior descending coronary arteries in swim-trained rats by an in situ video microscopic technique. Biol Sex Differ 2021; 12:42. [PMID: 34144709 PMCID: PMC8212452 DOI: 10.1186/s13293-021-00385-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary.
| | - Petra Merkely
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Eszter Mária Horváth
- Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Réka Eszter Sziva
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary.,Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Borbála Péterffy
- Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Attila Jósvai
- Department of Neurosurgery, Military Hospital, Róbert Károly körút 44, Budapest, 1134, Hungary
| | - Alex Ali Sayour
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - György László Nádasy
- Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
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21
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Török M, Merkely P, Monori-Kiss A, Horváth EM, Sziva RE, Péterffy B, Jósvai A, Sayour AA, Oláh A, Radovits T, Merkely B, Ács N, Nádasy GL, Várbíró S. Network analysis of the left anterior descending coronary arteries in swim-trained rats by an in situ video microscopic technique. Biol Sex Differ 2021; 12:37. [PMID: 34039432 PMCID: PMC8152314 DOI: 10.1186/s13293-021-00379-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/04/2021] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND We aimed to identify sex differences in the network properties and to recognize the geometric alteration effects of long-term swim training in a rat model of exercise-induced left ventricular (LV) hypertrophy. METHODS Thirty-eight Wistar rats were divided into four groups: male sedentary, female sedentary, male exercised and female exercised. After training sessions, LV morphology and function were checked by echocardiography. The geometry of the left coronary artery system was analysed on pressure-perfused, microsurgically prepared resistance artery networks using in situ video microscopy. All segments over > 80 μm in diameter were studied using divided 50-μm-long cylindrical ring units of the networks. Oxidative-nitrative (O-N) stress markers, adenosine A2A and estrogen receptor (ER) were investigated by immunohistochemistry. RESULTS The LV mass index, ejection fraction and fractional shortening significantly increased in exercised animals. We found substantial sex differences in the coronary network in the control groups and in the swim-trained animals. Ring frequency spectra were significantly different between male and female animals in both the sedentary and trained groups. The thickness of the wall was higher in males as a result of training. There were elevations in the populations of 200- and 400-μm vessel units in males; the thinner ones developed farther and the thicker ones closer to the orifice. In females, a new population of 200- to 250-μm vessels appeared unusually close to the orifice. CONCLUSIONS Physical activity and LV hypertrophy were accompanied by a remodelling of coronary resistance artery network geometry that was different in both sexes.
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Affiliation(s)
- Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082 Hungary
| | - Petra Merkely
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082 Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094 Hungary
| | - Eszter Mária Horváth
- Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094 Hungary
| | - Réka Eszter Sziva
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082 Hungary
- Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094 Hungary
| | - Borbála Péterffy
- Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094 Hungary
| | - Attila Jósvai
- Department of Neurosurgery, Military Hospital, Róbert Károly körút 44, Budapest, 1134 Hungary
| | - Alex Ali Sayour
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122 Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122 Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122 Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Városmajor u. 68, Budapest, 1122 Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082 Hungary
| | - György László Nádasy
- Department of Physiology, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094 Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082 Hungary
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22
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Abstract
Amyloids have long been associated with a variety of human degenerative diseases. Discoveries indicate, however, that there are several amyloids that serve functional roles in the human body. These amyloids are involved in a variety of biological processes ranging from storage of peptide hormones to necroptosis of cells. Additionally, there are distinct differences between toxic amyloids and their functional counterparts including kinetics of assembly/disassembly and structural features. This digest article surveys the biological roles of functional amyloids found in the human body, key differences between functional and toxic amyloids, and potential therapeutic applications.
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Affiliation(s)
- Amy Brown
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02125, USA
| | - Marianna Török
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02125, USA.
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23
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Baier A, Kokel A, Horton W, Gizińska E, Pandey G, Szyszka R, Török B, Török M. Organofluorine Hydrazone Derivatives as Multifunctional Anti-Alzheimer's Agents with CK2 Inhibitory and Antioxidant Features. ChemMedChem 2021; 16:1927-1932. [PMID: 33713036 DOI: 10.1002/cmdc.202100047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Indexed: 11/10/2022]
Abstract
A set of novel hydrazone derivatives were synthesized and analyzed for their biological activities. The compounds were tested for their inhibitory effect on the phosphorylating activity of the protein kinase CK2, and their antioxidant activity was also determined in three commonly used assays. The hydrazones were evaluated for their radical scavenging against the DPPH, ABTS and peroxyl radicals. Several compounds have been identified as good antioxidants as well as potent protein kinase CK2 inhibitors. Most hydrazones containing a 4-N(CH3 )2 residue or perfluorinated phenyl rings showed high activity in the radical-scavenging assays and possess nanomolar IC50 values in the kinase assays.
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Affiliation(s)
- Andrea Baier
- Department of Animal Physiology and Toxicology, The John Paul II Catholic University of Lublin, ul. Konstantynów 1i, 20-708, Lublin, Poland
| | - Anne Kokel
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA, 02125, USA
| | - William Horton
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA, 02125, USA
| | - Ewa Gizińska
- Department of Molecular Biology, The John Paul II Catholic University of Lublin, ul. Konstantynów 1i, 20-708, Lublin, Poland
| | - Garima Pandey
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA, 02125, USA
| | - Ryszard Szyszka
- Department of Molecular Biology, The John Paul II Catholic University of Lublin, ul. Konstantynów 1i, 20-708, Lublin, Poland
| | - Béla Török
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA, 02125, USA
| | - Marianna Török
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA, 02125, USA
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24
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Jósvai A, Török M, Mátrai M, Hetthéssy J, Monori-Kiss A, Makk J, Székács B, Nádasy GL, Várbíró S. Effects of Testosterone Deficiency and Angiotensin II-Induced Hypertension on the Biomechanics of Intramural Coronary Arteries. J Sex Med 2020; 17:2322-2330. [PMID: 33067160 DOI: 10.1016/j.jsxm.2020.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 08/14/2020] [Accepted: 09/12/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Andropause and hypertension also increase the risk of coronary artery damage. AIM To investigate the effect of testosterone deficiency and hypertension on intramural coronary vessels. METHODS 4 groups of 8-week-old Sprague-Dawley rats were studied: control male (Co, n=10), orchidectomized male (OCT, n=13), angiotensin (AII) hypertensive male (AII, n=10), and AII hypertensive and OCT (AII + OCT, n=8). Surgical orchidectomy was performed, and an osmotic minipump was inserted for chronic angiotensin II infusion (100 ng/min/kg). After 4 weeks, spontaneous tone and biomechanical properties of the intramural coronary resistance artery were investigated in vitro, by pressure microarteriography. OUTCOMES Morphology and biomechanics of the intramural coronaries were evaluated: the outer diameter, wall thickness-to-lumen diameter ratio, and tangential wall stress in the contracted and relaxed states. RESULTS The outer diameter was reduced in OCT and AII + OCT groups (on 50 mmHg 315 ± 20 Co; 237 ± 21 OCT; 291 ± 16 AII, and 166 ± 12 μm AII + OCT). The increased wall thickness-to-lumen diameter ratio resulted in lower tangential wall stress in AII + OCT rats (on 50 mmHg 19 ± 2 Co; 24 ± OCT; 26 ± 5 AII, and 9 ± 1 kPa AII + OCT). Spontaneous tone was increased in the hypertensive rats (AII and AII + OCT groups) (on 50 mmHg 7.7 ± 1.8 Co; 6.1 ± 1.4 OCT; 14.5 ± 3.0 AII, and 17.4 ± 4.1 % AII + OCT). CLINICAL IMPLICATIONS Andropause alone can be considered as a cardiovascular risk factor that will further exacerbate vascular damage in hypertension. STRENGTHS & LIMITATIONS A limitation of our study is that it was performed on relatively young rats, and the conclusions might not apply to coronary remodelling in older animals with slower adaptation processes. CONCLUSIONS Testosterone deficiency and hypertension damage the mechanical adaptation of the vessel wall additively: double noxa caused inward eutrophic remodeling and increased tone. Jósvai A, Török M, Mátrai M, et al. Effects of Testosterone Deficiency and Angiotensin II-Induced Hypertension on the Biomechanics of Intramural Coronary Arteries. J Sex Med 2020;17:2322-2330.
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Affiliation(s)
- Attila Jósvai
- Department of Neurosurgery, Hungarian Defence Forces Medical Centre, Budapest, Hungary.
| | - Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
| | - Máté Mátrai
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Judit Hetthéssy
- Department of Orthopedics, Semmelweis University, Budapest, Hungary
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Jennifer Makk
- Institute of Clinical Experimental Research, Semmelweis University, Budapest, Hungary
| | - Béla Székács
- 2nd Department Internal Medicine, Department Section of Geriatrics, Szt Imre Teaching Hospital, Budapest, Hungary
| | - György L Nádasy
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary
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Sári Z, Kovács T, Csonka T, Török M, Sebő É, Toth J, Tóth D, Mikó E, Kiss B, Szeőcs D, Uray K, Karányi Z, Kovács I, Méhes G, Árkosy P, Bai P. Fecal expression of Escherichia coli lysine decarboxylase (LdcC) is downregulated in E-cadherin negative lobular breast carcinoma. Physiol Int 2020; 107:349-358. [PMID: 32692716 DOI: 10.1556/2060.2020.00016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 05/21/2020] [Indexed: 11/19/2022]
Abstract
Breast cancer is characterized by oncobiosis, the abnormal composition of the microbiome in neoplastic diseases. The biosynthetic capacity of the oncobiotic flora in breast cancer is suppressed, as suggested by metagenomic studies. The microbiome synthesizes a set of cytostatic and antimetastatic metabolites that are downregulated in breast cancer, including cadaverine, a microbiome metabolite with cytostatic properties. We set out to assess how the protein expression of constitutive lysine decarboxylase (LdcC), a key enzyme for cadaverine production, changes in the feces of human breast cancer patients (n = 35). We found that the fecal expression of Escherichia coli LdcC is downregulated in lobular cases as compared to invasive carcinoma of no special type (NST) cases. Lobular breast carcinoma is characterized by low or absent expression of E-cadherin. Fecal E. coli LdcC protein expression is downregulated in E-cadherin negative breast cancer cases as compared to positive ones. Receiver operating characteristic (ROC) analysis of LdcC expression in lobular and NST cases revealed that fecal E. coli LdcC protein expression might have predictive values. These data suggest that the oncobiotic transformation of the microbiome indeed leads to the downregulation of the production of cytostatic and antimetastatic metabolites. In E-cadherin negative lobular carcinoma that has a higher potential for metastasis formation, the protein levels of enzymes producing antimetastatic metabolites are downregulated. This finding represents a new route that renders lobular cases permissive for metastasis formation. Furthermore, our findings underline the role of oncobiosis in regulating metastasis formation in breast cancer.
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Affiliation(s)
- Zs Sári
- 1Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - T Kovács
- 1Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - T Csonka
- 2Department of Pathology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - M Török
- 3Department of Pathology, Kenézy Gyula County Hospital, Debrecen, 4032, Hungary
| | - É Sebő
- 4Kenézy Breast Center, Kenézy Gyula County Hospital, Debrecen, 4032, Hungary
| | - J Toth
- 5Department of Oncology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - D Tóth
- 6Department of Surgery, Borsod-Abaúj-Zemplén County Hospital and University Teaching Hospital, Miskolc, 3526, Hungary
| | - E Mikó
- 1Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - B Kiss
- 5Department of Oncology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - D Szeőcs
- 1Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - K Uray
- 1Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - Zs Karányi
- 7Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - I Kovács
- 3Department of Pathology, Kenézy Gyula County Hospital, Debrecen, 4032, Hungary
| | - G Méhes
- 2Department of Pathology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - P Árkosy
- 5Department of Oncology, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
| | - P Bai
- 1Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary.,8MTA-DE Lendület Laboratory of Cellular Metabolism, Debrecen, 4032, Hungary.,9Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, 4032, Hungary
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Affiliation(s)
- Marianna Török
- University of Massachusetts Boston, Boston, MA, United States
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Török M, Monori-Kiss A, Pál É, Horváth E, Jósvai A, Merkely P, Barta BA, Mátyás C, Oláh A, Radovits T, Merkely B, Ács N, Nádasy GL, Várbíró S. Long-term exercise results in morphological and biomechanical changes in coronary resistance arterioles in male and female rats. Biol Sex Differ 2020; 11:7. [PMID: 32051031 PMCID: PMC7017613 DOI: 10.1186/s13293-020-0284-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 02/05/2020] [Indexed: 12/16/2022] Open
Abstract
Background Biomechanical remodeling of coronary resistance arteries in physiological left ventricular hypertrophy has not yet been analyzed, and the possible sex differences are unknown. Methods Wistar rats were divided into four groups: male and female sedentary controls (MSe and FSe) and male and female animals undergoing a 12-week intensive swim training program (MEx and FEx). On the last day, the in vitro contractility, endothelium-dependent dilatation, and biomechanical properties of the intramural coronary resistance arteries were investigated by pressure microarteriography. Elastica and collagen remodeling were studied in histological sections. Results A similar outer radius and reduced inner radius resulted in an elevated wall to lumen ratio in the MEx and FEx animals compared to that in the sedentary controls. The wall elastic moduli increased in the MEx and FEx rats. Spontaneous and TxA2 agonist-induced tone was increased in the FEx animals, whereas endothelium-dependent relaxation became more effective in MEx rats. Arteries of FEx rats had stronger contraction, while arteries of MEx animals had improved dilation. Conclusions According to our results, the coronary arterioles adapted to an elevated load during long-term exercise, and this adaptation depended on sex. It is important to emphasize that in addition to differences, we also found many similarities between the sexes in the adaptive response to exercise. The observed sport adaptation in the coronary resistance arteries of rats may contribute to a better understanding of the physiological and pathological function of these arteries in active and retired athletes of different sexes.
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Affiliation(s)
- Marianna Török
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary.
| | - Anna Monori-Kiss
- Institute of Clinical Experimental Research, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Éva Pál
- Institute of Clinical Experimental Research, Semmelweis University, Tűzoltó u. 37-47, Budapest, 1094, Hungary
| | - Eszter Horváth
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - Attila Jósvai
- Department of Neurosurgery, Military Hospital, Róbert Károly körút 44, Budapest, 1134, Hungary
| | - Petra Merkely
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - Bálint András Barta
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Csaba Mátyás
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Városmajor u 68, Budapest, 1122, Hungary
| | - Nándor Ács
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
| | - György László Nádasy
- Department of Physiology, Semmelweis University, Tűzoltó u 37-47, Budapest, 1094, Hungary
| | - Szabolcs Várbíró
- Department of Obstetrics and Gynecology, Semmelweis University, Üllői u. 78/a, Budapest, 1082, Hungary
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Oláh A, Mátyás C, Kellermayer D, Ruppert M, Barta BA, Sayour AA, Török M, Koncsos G, Giricz Z, Ferdinandy P, Merkely B, Radovits T. Sex Differences in Morphological and Functional Aspects of Exercise-Induced Cardiac Hypertrophy in a Rat Model. Front Physiol 2019; 10:889. [PMID: 31354526 PMCID: PMC6639783 DOI: 10.3389/fphys.2019.00889] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 06/26/2019] [Indexed: 01/20/2023] Open
Abstract
Background: Recent evidences suggest that sex hormones may be involved in the regulation of exercise-induced left ventricular (LV) hypertrophy. However, the sex-specific functional consequences of exercise-induced myocardial hypertrophy is still not investigated in detail. We aimed at understanding the sex-specific functional and morphological alterations in the LV and the underlying molecular changes in a rat model of athlete’s heart. Methods: We divided our young, adult male and female rats into control and exercised groups. Athlete’s heart was induced by a 12-week long swim training. Following the training period, we assessed LV hypertrophy with echocardiography, while pressure-volume analysis was performed to investigate in vivo LV function. After in vivo experiments, molecular biological studies and histological investigations were performed. Results: Echocardiography and post-mortem measured heart weight data indicated LV hypertrophy in both genders, nevertheless it was more pronounced in females. Despite the more significant relative hypertrophy in females, characteristic functional parameters did not show notable differences between the genders. LV pressure-volume analysis showed increased stroke volume, improved contractility and stroke work and unaltered LV stiffness in both male and female exercised rats, while active relaxation was ameliorated solely in male animals. The induction of Akt signaling was more significant in females compared to males. There was also a characteristic difference in the mitogen-activated protein kinase pathway as suppressed phosphorylation of p44/42 MAPK (Erk) and mTOR was observed in female exercised rats, but not in male ones. Myosin heavy chain α (MHC)/β-MHC ratio did not differ in males, but increased markedly in females. Conclusion: Our results confirm that there is a more pronounced exercise-induced LV hypertrophy in females as compared to the males, however, there are only minor differences regarding LV function. There are characteristic molecular differences between male and female animals, that can explain different degrees of LV hypertrophy.
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Affiliation(s)
- Attila Oláh
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Csaba Mátyás
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | | | - Mihály Ruppert
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | | | - Alex Ali Sayour
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Marianna Török
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Gábor Koncsos
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
| | - Zoltáng Giricz
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
| | - Péter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary.,Pharmahungary Group, Szeged, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
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Gokalp S, Horton W, Jónsdóttir-Lewis EB, Foster M, Török M. Laboratory exercise for studying the morphology of heat-denatured and amyloid aggregates of lysozyme by atomic force microscopy. Biochem Mol Biol Educ 2018; 46:162-171. [PMID: 29219231 DOI: 10.1002/bmb.21101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 10/18/2017] [Accepted: 11/21/2017] [Indexed: 05/20/2023]
Abstract
To facilitate learning advanced instrumental techniques, essential tools for visualizing biomaterials, a simple and versatile laboratory exercise demonstrating the use of Atomic Force Microscopy (AFM) in biomedical applications was developed. In this experiment, the morphology of heat-denatured and amyloid-type aggregates formed from a low-cost and well-characterized model protein, hen egg white lysozyme (HEWL), are compared. Structural differences between the amorphous and ordered particles are quantified using ImageJ for the analysis of AFM images as a postlaboratory assignment. The laboratory exercise allows the direct observation of changes in the protein structure and helps students to understand the operation of AFM, as well as protein folding and misfolding related to many physiological and pathological processes. The described protocol stands alone, but also fits well into a larger module on protein structure and function or microscopic techniques as it can be linked easily to existing laboratory exercises on these topics. It can be easily adapted to the upper level undergraduate laboratory courses with limited lab hours as well as graduate level courses to improve students' research skills. © 2017 by The International Union of Biochemistry and Molecular Biology, 46(2):162-171, 2018.
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Affiliation(s)
- Sumeyra Gokalp
- Department of Chemistry, University of Massachusetts Boston, Boston, Massachusetts, 02125
| | - William Horton
- Department of Chemistry, University of Massachusetts Boston, Boston, Massachusetts, 02125
| | | | - Michelle Foster
- Department of Chemistry, University of Massachusetts Boston, Boston, Massachusetts, 02125
| | - Marianna Török
- Department of Chemistry, University of Massachusetts Boston, Boston, Massachusetts, 02125
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Banu R, Gerding J, Franklin C, Sikazwe D, Horton W, Török M, Davis J, Cheng KH, Nakazwe M, Mochona B. 4,5-Dimethoxy-2-nitrobenzohydrazides and 1-(1-Benzylpiperidin-4-yl)ethan-1-ones as Potential Antioxidant/Cholinergic Endowed Small Molecule Leads. Sci Pharm 2017; 86:scipharm86010002. [PMID: 29267246 PMCID: PMC5874532 DOI: 10.3390/scipharm86010002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 12/13/2017] [Accepted: 12/13/2017] [Indexed: 11/16/2022] Open
Abstract
The objective of this research is to generate leads for developing our ultimate poly-active molecules with utility in central nervous system (CNS) diseases. Indeed, poly-active molecules capable of mitigating brain free radical damage while enhancing acetylcholine signaling (via cholinesterase inhibition) are still being sought for combating Alzheimer's disease (AD). We differentiate "poly-active" agents from "multi-target" ones by defining them as single molecular entities designed to target only specific contributory synergistic pharmacologies in a disease. For instance, in AD, free radicals either initiate or act in synergy with other pharmacologies, leading to disease worsening. For this preliminary report, a total of 14 (i.e., 4,5-dimethoxy-2-nitrobenzohydrazide plus 1-(1-benzylpiperidin-4-yl)ethan-1-one) derivatives were synthesized and screened, in silico and in vitro, for their ability to scavenge free radicals and inhibit acetylcholinesterase (AChE)/butyrylcholinesterase (BuChE) enzymes. Overall, six derivatives (4a, 4d, 4e, 4f, 4g, 9b) exhibited potent (>30%) antioxidant properties in the oxygen radical absorbance capacity (ORAC) assay. The antioxidant values were either comparable or more potent than the comparator molecules (ascorbic acid, resveratrol, and trolox). Only three compounds (4d, 9a, 9c) yielded modest AChE/BuChE inhibitions (>10%). Please note that a SciFinder substance data base search confirmed that most of the compounds reported herein are new, except 9a and 9c which are also commercially available.
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Affiliation(s)
- Rukhsar Banu
- Pharmaceutical Sciences Department, Feik School of Pharmacy, University of the Incarnate Word, San Antonio, TX 78209, USA.
| | - Jason Gerding
- Pharmaceutical Sciences Department, Feik School of Pharmacy, University of the Incarnate Word, San Antonio, TX 78209, USA.
| | - Cynthia Franklin
- Pharmaceutical Sciences Department, Feik School of Pharmacy, University of the Incarnate Word, San Antonio, TX 78209, USA.
| | - Donald Sikazwe
- Pharmaceutical Sciences Department, Feik School of Pharmacy, University of the Incarnate Word, San Antonio, TX 78209, USA.
| | - William Horton
- Department of Chemistry, University of Massachusetts Boston, Boston, MA 02125, USA.
| | - Marianna Török
- Department of Chemistry, University of Massachusetts Boston, Boston, MA 02125, USA.
| | - Julian Davis
- Chemistry Department, School of Mathematics, Science and Engineering, University of the Incarnate Word, San Antonio, TX 78209, USA.
| | - Kwan H Cheng
- Department of Physics and Astronomy and Neuroscience Program, Trinity University, San Antonio, TX 78212, USA.
| | - Muziya Nakazwe
- Anatomy and Physiology Department, School of Osteopathic Medicine, University of the Incarnate Word, San Antonio, TX 78209, USA.
| | - Bereket Mochona
- Department of Chemistry, Florida A&M University, Tallahassee, FL 32307, USA.
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Oláh A, Kellermayer D, Mátyás C, Németh BT, Lux Á, Szabó L, Török M, Ruppert M, Meltzer A, Sayour AA, Benke K, Hartyánszky I, Merkely B, Radovits T. Complete Reversion of Cardiac Functional Adaptation Induced by Exercise Training. Med Sci Sports Exerc 2017; 49:420-429. [PMID: 27755352 DOI: 10.1249/mss.0000000000001127] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE Long-term exercise training is associated with characteristic cardiac adaptation, termed athlete's heart. Our research group previously characterized in vivo left ventricular (LV) function of exercise-induced cardiac hypertrophy in detail in a rat model; however, the effect of detraining on LV function is still unclear. We aimed at evaluating the reversibility of functional alterations of athlete's heart after detraining. METHODS Rats (n = 16) were divided into detrained exercised (DEx) and detrained control (DCo) groups. Trained rats swam 200 min·d for 12 wk, and control rats were taken into water for 5 min·d. After the training period, both groups remained sedentary for 8 wk. We performed echocardiography at weeks 12 and 20 to investigate the development and regression of exercise-induced structural changes. LV pressure-volume analysis was performed to calculate cardiac functional parameters. LV samples were harvested for histological examination. RESULTS Echocardiography showed robust LV hypertrophy after completing the training protocol (LV mass index = 2.61 ± 0.08 DEx vs 2.04 ± 0.04 g·kg DCo, P < 0.05). This adaptation regressed after detraining (LV mass index = 2.01 ± 0.03 vs 1.97 ± 0.05 g·kg, n.s.), which was confirmed by postmortem measured heart weight and histological morphometry. After the 8-wk-long detraining period, a regression of the previously described exercise-induced cardiac functional alterations was observed (DEx vs DCo): stroke volume (SV; 144.8 ± 9.0 vs 143.9 ± 9.6 μL, P = 0.949), active relaxation (τ = 11.5 ± 0.3 vs 11.3 ± 0.4 ms, P = 0.760), contractility (preload recruitable stroke work = 69.5 ± 2.7 vs 70.9 ± 2.4 mm Hg, P = 0.709), and mechanoenergetic (mechanical efficiency = 68.7 ± 1.2 vs 69.4 ± 1.8, P = 0.742) enhancement reverted completely to control values. Myocardial stiffness remained unchanged; moreover, no fibrosis was observed after the detraining period. CONCLUSION Functional consequences of exercise-induced physiological LV hypertrophy completely regressed after 8 wk of deconditioning.
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Affiliation(s)
- Attila Oláh
- Heart and Vascular Center, Semmelweis University, Budapest, HUNGARY
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Horton W, Sood A, Peerannawar S, Kugyela N, Kulkarni A, Tulsan R, Tran CD, Soule J, LeVine H, Török B, Török M. Synthesis and application of β-carbolines as novel multi-functional anti-Alzheimer's disease agents. Bioorg Med Chem Lett 2017; 27:232-236. [PMID: 27923619 PMCID: PMC5282889 DOI: 10.1016/j.bmcl.2016.11.067] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 12/22/2022]
Abstract
The design, synthesis and assessment of β-carboline core-based compounds as potential multifunctional agents against several processes that are believed to play a significant role in Alzheimer's disease (AD) pathology, are described. The activity of the compounds was determined in Aβ self-assembly (fibril and oligomer formation) and cholinesterase (AChE, BuChE) activity inhibition, and their antioxidant properties were also assessed. To obtain insight into the mode of action of the compounds, HR-MS studies were carried out on the inhibitor-Aβ complex formation and molecular docking was performed on inhibitor-BuChE interactions. While several compounds exhibited strong activities in individual assays, compound 14 emerged as a promising multi-target lead for the further structure-activity relationship studies.
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Affiliation(s)
- William Horton
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Abha Sood
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | | | - Nandor Kugyela
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Aditya Kulkarni
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Rekha Tulsan
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Chris D Tran
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Jessica Soule
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Harry LeVine
- Department of Molecular and Cellular Biochemistry, Chandler School of Medicine, and Center on Aging, University of Kentucky, Lexington, KY 40536, USA
| | - Béla Török
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA
| | - Marianna Török
- University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA, USA.
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Mátyás C, Németh BT, Oláh A, Török M, Ruppert M, Kellermayer D, Barta BA, Szabó G, Kökény G, Horváth EM, Bódi B, Papp Z, Merkely B, Radovits T. Prevention of the development of heart failure with preserved ejection fraction by the phosphodiesterase-5A inhibitor vardenafil in rats with type 2 diabetes. Eur J Heart Fail 2016; 19:326-336. [PMID: 27995696 PMCID: PMC5347963 DOI: 10.1002/ejhf.711] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 10/21/2016] [Accepted: 11/09/2016] [Indexed: 12/28/2022] Open
Abstract
Aims Heart failure with preserved ejection fraction (HFpEF) has a great epidemiological burden. The pathophysiological role of cyclic guanosine monophosphate (cGMP) signalling has been intensively investigated in HFpEF. Elevated levels of cGMP have been shown to exert cardioprotective effects in various cardiovascular diseases, including diabetic cardiomyopathy. We investigated the effect of long‐term preventive application of the phosphodiesterase‐5A (PDE5A) inhibitor vardenafil in diabetic cardiomyopathy‐associated HFpEF. Methods and results Zucker diabetic fatty (ZDF) rats were used as a model of HFpEF and ZDF lean rats served as controls. Animals received vehicle or 10 mg/kg body weight vardenafil per os from weeks 7 to 32 of age. Cardiac function, morphology was assessed by left ventricular (LV) pressure–volume analysis and echocardiography at week 32. Cardiomyocyte force measurements were performed. The key markers of cGMP signalling, nitro‐oxidative stress, apoptosis, myocardial hypertrophy and fibrosis were examined. The ZDF animals showed diastolic dysfunction (increased LV/cardiomyocyte stiffness, prolonged LV relaxation time), preserved systolic performance, decreased myocardial cGMP level coupled with impaired protein kinase G (PKG) activity, increased nitro‐oxidative stress, enhanced cardiomyocyte apoptosis, and hypertrophic and fibrotic remodelling of the myocardium. Vardenafil effectively prevented the development of HFpEF by maintaining diastolic function (decreased LV/cardiomyocyte stiffness and LV relaxation time), by restoring cGMP levels and PKG activation, by lowering apoptosis and by alleviating nitro‐oxidative stress, myocardial hypertrophy and fibrotic remodelling. Conclusions We report that vardenafil successfully prevented the development of diabetes mellitus‐associated HFpEF. Thus, PDE5A inhibition as a preventive approach might be a promising option in the management of HFpEF patients with diabetes mellitus.
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Affiliation(s)
- Csaba Mátyás
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Balázs T Németh
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Attila Oláh
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Marianna Török
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Mihály Ruppert
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Dalma Kellermayer
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Bálint A Barta
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Gábor Szabó
- Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany
| | - Gábor Kökény
- Institute of Pathophysiology, Semmelweis University, Budapest, Hungary
| | - Eszter M Horváth
- Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Beáta Bódi
- Division of Clinical Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Zoltán Papp
- Division of Clinical Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Béla Merkely
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
| | - Tamás Radovits
- Experimental Research Laboratory, Heart and Vascular Center, Semmelweis University, Városmajor u. 68, 1122, Budapest, Hungary
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Peerannawar S, Horton W, Kokel A, Török F, Török M, Török B. Theoretical and experimental analysis of the antioxidant features of diarylhydrazones. Struct Chem 2016. [DOI: 10.1007/s11224-016-0867-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Oláh A, Németh BT, Mátyás C, Hidi L, Lux Á, Ruppert M, Kellermayer D, Sayour AA, Szabó L, Török M, Meltzer A, Gellér L, Merkely B, Radovits T. Physiological and pathological left ventricular hypertrophy of comparable degree is associated with characteristic differences of in vivo hemodynamics. Am J Physiol Heart Circ Physiol 2015; 310:H587-97. [PMID: 26718969 DOI: 10.1152/ajpheart.00588.2015] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Left ventricular (LV) hypertrophy is a physiological or pathological response of LV myocardium to increased cardiac load. We aimed at investigating and comparing hemodynamic alterations in well-established rat models of physiological hypertrophy (PhyH) and pathological hypertrophy (PaH) by using LV pressure-volume (P-V) analysis. PhyH and PaH were induced in rats by swim training and by abdominal aortic banding, respectively. Morphology of the heart was investigated by echocardiography. Characterization of cardiac function was completed by LV P-V analysis. In addition, histological and molecular biological measurements were performed. Echocardiography revealed myocardial hypertrophy of similar degree in both models, which was confirmed by post-mortem heart weight data. In aortic-banded rats we detected subendocardial fibrosis. Reactivation of fetal gene program could be observed only in the PaH model. PhyH was associated with increased stroke volume, whereas unaltered stroke volume was detected in PaH along with markedly elevated end-systolic pressure values. Sensitive indexes of LV contractility were increased in both models, in parallel with the degree of hypertrophy. Active relaxation was ameliorated in athlete's heart, whereas it showed marked impairment in PaH. Mechanical efficiency and ventriculo-arterial coupling were improved in PhyH, whereas they remained unchanged in PaH. Myocardial gene expression of mitochondrial regulators showed marked differences between PaH and PhyH. We provided the first comparative hemodynamic characterization of PhyH and PaH in relevant rodent models. Increased LV contractility could be observed in both types of LV hypertrophy; characteristic distinction was detected in diastolic function (active relaxation) and mechanoenergetics (mechanical efficiency), which might be explained by mitochondrial differences.
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Affiliation(s)
- Attila Oláh
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | | | - Csaba Mátyás
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - László Hidi
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Árpád Lux
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Mihály Ruppert
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | | | - Alex Ali Sayour
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Lilla Szabó
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Marianna Török
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Anna Meltzer
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - László Gellér
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
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36
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Bag S, Tulsan R, Sood A, Cho H, Redjeb H, Zhou W, LeVine H, Török B, Török M. Sulfonamides as multifunctional agents for Alzheimer’s disease. Bioorg Med Chem Lett 2015; 25:626-30. [DOI: 10.1016/j.bmcl.2014.12.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 12/03/2014] [Indexed: 11/30/2022]
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Kovács A, Oláh A, Lux Á, Mátyás C, Németh BT, Kellermayer D, Ruppert M, Török M, Szabó L, Meltzer A, Assabiny A, Birtalan E, Merkely B, Radovits T. Strain and strain rate by speckle-tracking echocardiography correlate with pressure-volume loop-derived contractility indices in a rat model of athlete's heart. Am J Physiol Heart Circ Physiol 2015; 308:H743-8. [PMID: 25617359 DOI: 10.1152/ajpheart.00828.2014] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/17/2015] [Indexed: 01/19/2023]
Abstract
Contractile function is considered to be precisely measurable only by invasive hemodynamics. We aimed to correlate strain values measured by speckle-tracking echocardiography (STE) with sensitive contractility parameters of pressure-volume (P-V) analysis in a rat model of exercise-induced left ventricular (LV) hypertrophy. LV hypertrophy was induced in rats by swim training and was compared with untrained controls. Echocardiography was performed using a 13-MHz linear transducer to obtain LV long- and short-axis recordings for STE analysis (GE EchoPAC). Global longitudinal (GLS) and circumferential strain (GCS) and longitudinal (LSr) and circumferential systolic strain rate (CSr) were measured. LV P-V analysis was performed using a pressure-conductance microcatheter, and load-independent contractility indices [slope of the end-systolic P-V relationship (ESPVR), preload recruitable stroke work (PRSW), and maximal dP/dt-end-diastolic volume relationship (dP/dtmax-EDV)] were calculated. Trained rats had increased LV mass index (trained vs. control; 2.76 ± 0.07 vs. 2.14 ± 0.05 g/kg, P < 0.001). P-V loop-derived contractility parameters were significantly improved in the trained group (ESPVR: 3.58 ± 0.22 vs. 2.51 ± 0.11 mmHg/μl; PRSW: 131 ± 4 vs. 104 ± 2 mmHg, P < 0.01). Strain and strain rate parameters were also supernormal in trained rats (GLS: -18.8 ± 0.3 vs. -15.8 ± 0.4%; LSr: -5.0 ± 0.2 vs. -4.1 ± 0.1 Hz; GCS: -18.9 ± 0.8 vs. -14.9 ± 0.6%; CSr: -4.9 ± 0.2 vs. -3.8 ± 0.2 Hz, P < 0.01). ESPVR correlated with GLS (r = -0.71) and LSr (r = -0.53) and robustly with GCS (r = -0.83) and CSr (r = -0.75, all P < 0.05). PRSW was strongly related to GLS (r = -0.64) and LSr (r = -0.71, both P < 0.01). STE can be a feasible and useful method for animal experiments. In our rat model, strain and strain rate parameters closely reflected the improvement in intrinsic contractile function induced by exercise training.
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Affiliation(s)
- Attila Kovács
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Attila Oláh
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Árpád Lux
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Csaba Mátyás
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | | | | | - Mihály Ruppert
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Marianna Török
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Lilla Szabó
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Anna Meltzer
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | | | - Ede Birtalan
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Tamás Radovits
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
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Schäfer C, Mhadgut SC, Kugyela N, Török M, Török B. Proline-induced enantioselective heterogeneous catalytic hydrogenation of isophorone on basic polymer-supported Pd catalysts. Catal Sci Technol 2015. [DOI: 10.1039/c4cy00954a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Formation of excess (R)-dihydroisophorone was observed (50% ee) at the early stage of the reaction supporting the existence of asymmetric catalysis.
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Affiliation(s)
| | - Shilpa C. Mhadgut
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
- Michigan Technological University
| | - Nándor Kugyela
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
| | - Marianna Török
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
- Michigan Technological University
| | - Béla Török
- Department of Chemistry
- University of Massachusetts Boston
- Boston
- USA
- Michigan Technological University
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39
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Melanson M, Sood A, Török F, Török M. Introduction to spin label electron paramagnetic resonance spectroscopy of proteins. Biochem Mol Biol Educ 2013; 41:156-162. [PMID: 23281241 DOI: 10.1002/bmb.20677] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 11/05/2012] [Indexed: 06/01/2023]
Abstract
An undergraduate laboratory exercise is described to demonstrate the biochemical applications of electron paramagnetic resonance (EPR) spectroscopy. The β93 cysteine residue of hemoglobin is labeled by the covalent binding of 3-maleimido-proxyl (5-MSL) and 2,2,5,5-tetramethyl-1-oxyl-3-methyl methanethiosulfonate (MTSL), respectively. The excess spin label is removed by gel-exclusion chromatography. Changes in the mobility of the reporter groups attached to the protein are monitored by EPR spectroscopy. While the spectral parameters of the rigidly attached 5-MSL provide information on the rotation of the whole spin labeled protein, MTSL bound by a more flexible linkage describes the local environment of the cysteine residue in the interior of the protein structure. Students can study the known crystal structure of hemoglobin in comparison to the results they obtain by analyzing the EPR spectra. Overall, the exercise introduces them to laboratory techniques such as protein labeling, gel filtration, EPR spectroscopy, as well as familiarizes them with the online Protein Data Bank as a research resource and PyMOL software as a structure visualization tool.
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Affiliation(s)
- Michelle Melanson
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02125, USA
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40
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Bag S, Ghosh S, Tulsan R, Sood A, Zhou W, Schifone C, Foster M, LeVine H, Török B, Török M. Design, synthesis and biological activity of multifunctional α,β-unsaturated carbonyl scaffolds for Alzheimer's disease. Bioorg Med Chem Lett 2013; 23:2614-8. [PMID: 23540646 PMCID: PMC3676911 DOI: 10.1016/j.bmcl.2013.02.103] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 02/15/2013] [Accepted: 02/25/2013] [Indexed: 01/09/2023]
Abstract
A series of compounds containing an α,β-unsaturated carbonyl moiety, such as chalcones and coumarins were designed, synthesized and tested in a variety of assays to assess their potential as anti-Alzheimer's disease (AD) agents. The investigations included the inhibition of cholinesterases (AChE, BuChE), the inhibition of amyloid beta (Aβ) self-assembly and the disassembly of preformed Aβ oligomers. Several compounds showed excellent potential as multifunctional compounds for AD. Docking studies for 16 that performed well in all the assays gave a clear interpretation of various interactions in the gorge of AChE. Based on the results, the long-chain coumarin scaffold appears to be a promising structural template for further AD drug development.
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Affiliation(s)
- Seema Bag
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA 02125-3393, USA
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41
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Bag S, Tulsan R, Sood A, Datta S, Török M. Pharmacophore Modeling, virtual and in vitro screening for acetylcholinesterase inhibitors and their effects on amyloid-β self- assembly. Curr Comput Aided Drug Des 2013; 9:2-14. [PMID: 22734711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 03/14/2012] [Accepted: 03/25/2012] [Indexed: 06/01/2023]
Abstract
One of the most promising methods of unveiling the pharmacology of marketed drugs is to screen them against new biological targets. In an attempt to find inhibitors for acetylcholinesterase (AChE), the Drug Bank Database and natural alkaloids with other known medicinal values were screened through a four-point pharmacophore built in this study. The development of the pharmacophore was based on a structurally diverse set of reported AChE inhibitors and was validated using a separate set of known inhibitors. The developed pharmacophore indicated that the presence of one H-acceptor motif, one H-donor motif, one positively charged group and one aromatic ring is needed for AChE inhibition. Selected hits were further investigated by molecular docking and in vitro testing. The assays revealed that the majority of these compounds showed reasonable inhibition, indicating that the developed pharmacophore can indeed reliably screen molecules for potential AChE inhibitors. It appears that several commercially available marketed drugs have further potential as AChE inhibitors. To extend our study the same compounds have been tested in the fibrillogenesis inhibition of amyloidβ (Aβ) peptide to explore the possibility of their dual-function therapeutic activity in Alzheimer's disease.
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Affiliation(s)
- Seema Bag
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02125, USA
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42
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Török B, Sood A, Bag S, Tulsan R, Ghosh S, Borkin D, Kennedy AR, Melanson M, Madden R, Zhou W, Levine H, Török M. Diaryl hydrazones as multifunctional inhibitors of amyloid self-assembly. Biochemistry 2013; 52:1137-48. [PMID: 23346953 DOI: 10.1021/bi3012059] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The design and application of an effective, new class of multifunctional small molecule inhibitors of amyloid self-assembly are described. Several compounds based on the diaryl hydrazone scaffold were designed. Forty-four substituted derivatives of this core structure were synthesized using a variety of benzaldehydes and phenylhydrazines and characterized. The inhibitor candidates were evaluated in multiple assays, including the inhibition of amyloid β (Aβ) fibrillogenesis and oligomer formation and the reverse processes, the disassembly of preformed fibrils and oligomers. Because the structure of the hydrazone-based inhibitors mimics the redox features of the antioxidant resveratrol, the radical scavenging effect of the compounds was evaluated by colorimetric assays against 2,2-diphenyl-1-picrylhydrazyl and superoxide radicals. The hydrazone scaffold was active in all of the different assays. The structure-activity relationship revealed that the substituents on the aromatic rings had a considerable effect on the overall activity of the compounds. The inhibitors showed strong activity in fibrillogenesis inhibition and disassembly, and even greater potency in the inhibition of oligomer formation and oligomer disassembly. Supporting the quantitative fluorometric and colorimetric assays, size exclusion chromatographic studies indicated that the best compounds practically eliminated or substantially inhibited the formation of soluble, aggregated Aβ species, as well. Atomic force microscopy was also applied to monitor the morphology of Aβ deposits. The compounds also possessed the predicted antioxidant properties; approximately 30% of the synthesized compounds showed a radical scavenging effect equal to or better than that of resveratrol or ascorbic acid.
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Affiliation(s)
- Béla Török
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, MA 02125-3393, USA
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43
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Nagy Z, Orosz E, Kovács I, Török M, Bíró T, Blumberg P, Czifra G. 381 Investigation of RasGRP3 Expression and Function in Human Breast Cancers and Breast-derived Ductal Adenocarcinoma Cell Lines. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72179-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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44
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Török B, Sood A, Bag S, Kulkarni A, Borkin D, Lawler E, Dasgupta S, Landge S, Abid M, Zhou W, Foster M, LeVine H, Török M. Structure-activity relationships of organofluorine inhibitors of β-amyloid self-assembly. ChemMedChem 2012; 7:910-9. [PMID: 22351619 DOI: 10.1002/cmdc.201100569] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 01/30/2012] [Indexed: 12/22/2022]
Abstract
A broad group of structurally diverse small organofluorine compounds were synthesized and evaluated as inhibitors of β-amyloid (Aβ) self-assembly. The main goal was to generate a diverse library of compounds with the same functional group and to observe general structural features that characterize inhibitors of Aβ oligomer and fibril formation, ultimately identifying structures for further focused inhibitor design. The common structural motifs in these compounds are CF(3) -C-OH and CF(3) -C-NH groups that were proposed to be binding units in our previous studies. A broad range of potential small-molecule inhibitors were synthesized by combining various carbocyclic and heteroaromatic rings with an array of substituents, generating a total of 106 molecules. The compounds were tested by standard methods such as thioflavin-T fluorescence spectroscopy for monitoring fibril formation, biotinyl Aβ(1-42) single-site streptavidin-based assays for observing oligomer formation, and atomic force microscopy for morphological studies. These assays revealed a number of structures that show significant inhibition against either Aβ fibril or oligomer formation. A detailed analysis of the structure-activity relationship of anti-fibril and -oligomer properties is provided. These data present further experimental evidence for the distinct nature of fibril versus oligomer formation and indicate that the interaction of the Aβ peptide with chiral small molecules is not stereospecific in nature.
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Affiliation(s)
- Béla Török
- Department of Chemistry, University of Massachusetts Boston, Boston, MA 02125, USA.
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45
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Sood A, Abid M, Sauer C, Hailemichael S, Foster M, Török B, Török M. Disassembly of preformed amyloid beta fibrils by small organofluorine molecules. Bioorg Med Chem Lett 2011; 21:2044-7. [PMID: 21354796 DOI: 10.1016/j.bmcl.2011.02.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Revised: 02/02/2011] [Accepted: 02/03/2011] [Indexed: 12/30/2022]
Abstract
A potential therapeutic approach for Alzheimer's disease is to reduce the amount of toxic amyloid-beta oligomers and fibrillar amyloid plaques. In order to contribute to this approach the ability of small organofluorine compounds that were previously reported as successful inhibitors of fibrillogenesis to destabilize preformed fibrils of the amyloid-beta peptide was studied. These organofluorine molecules including chiral compounds were tested in vitro using standard methods based on Thioflavin-T (THT) fluorescence spectroscopy, atomic force microscopy (AFM) and Fourier-transform infrared spectroscopy (FTIR). It was observed that 5'-halogen substituted 3,3,3-trifluoromethyl-2-hydroxyl-(indol-3-yl)-propionic acid esters showed significant activity in the disassembly of the preformed fibrils. Since the same compounds were identified as strong fibrillogenesis inhibitors as well, this dual action makes them promising candidates for further drug development.
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Affiliation(s)
- Abha Sood
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02125-3393, USA
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46
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Borkin D, Morzhina E, Datta S, Rudnitskaya A, Sood A, Török M, Török B. Heteropoly acid-catalyzed microwave-assisted three-component aza-Diels-Alder cyclizations: diastereoselective synthesis of potential drug candidates for Alzheimer's disease. Org Biomol Chem 2011; 9:1394-401. [PMID: 21210035 DOI: 10.1039/c0ob00638f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly diastereoselective microwave-assisted three component synthesis of azabicyclo[2.2.2]octan-5-ones by a silicotungstic acid-catalyzed aza-Diels-Alder cyclization is described. The one-pot process involves the formation of the in situ generated Schiff base and its immediate cyclization with cyclohex-2-enone. The short reaction times, good yields and excellent diastereoselectivity make this annulation a practical and environmentally attractive method for the synthesis of the target compounds. Preliminary assays were carried out to determine the activity of the products in AChE as well as in amyloid β fibrillogenesis inhibition.
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Affiliation(s)
- Dmitry Borkin
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd., Boston, MA 02125, USA
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47
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Lüde S, Török M, Dieterle S, Knapp AC, Kaeufeler R, Jäggi R, Spornitz U, Krähenbühl S. Erratum to: Hepatic effects of Cimicifuga racemosa extract in vivo and in vitro. Cell Mol Life Sci 2010. [DOI: 10.1007/s00018-010-0310-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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48
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Rudnitskaya A, Török B, Török M. Molecular docking of enzyme inhibitors: A COMPUTATIONAL TOOL FOR STRUCTURE-BASED DRUG DESIGN. Biochem Mol Biol Educ 2010; 38:261-265. [PMID: 21567838 DOI: 10.1002/bmb.20392] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Molecular docking is a frequently used method in structure-based rational drug design. It is used for evaluating the complex formation of small ligands with large biomolecules, predicting the strength of the bonding forces and finding the best geometrical arrangements. The major goal of this advanced undergraduate biochemistry laboratory exercise is to illustrate the importance and application of this tool. Students carry out the computational modeling of the interaction of acetylcholinesterase and its inhibitor, tacrine, and learn about the concepts of protein structure, enzyme-inhibitor interactions, intermolecular forces, and role of molecular design in drug-development.
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Affiliation(s)
- Aleksandra Rudnitskaya
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd. Boston, MA 02125
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49
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Nasr KA, Schubert CR, Török M, Kennedy RJ, Kemp DS. Helix-coil energetics for helix formers and breakers reflect context and temperature: mutants of helically robust, guest-sensitive homopeptide hosts. Biopolymers 2010; 91:311-20. [PMID: 19117030 DOI: 10.1002/bip.21129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The natural amino acids are primarily helix breakers at the low assignment temperatures characteristic of many studies, but recent genomic analyses of thermophilic proteins suggest that at high temperatures, some breakers may become strong helix formers. Moreover, the breaker/former inventory has not been previously characterized at the physiologically relevant temperature of 37 degrees C. The versatility of 13C==O NMR chemical shifts as helicity reporters allows construction of two mutant peptide series, tailored to expand the range of temperature assignments for helical propensities and derived from the core hosts tL-Ala9XxxAla9-tL and tL-AlaNva4XxxNva4Ala9-tL, Nva=norvaline. For three limiting guests Xxx, the helix former Nva and the breakers Gly and Pro, we report wXxx[T] assignments at seven temperatures from 2 to 80 degrees C, validating our reasoning and paving the way for assignment of a definitive wXxx[T] data-base.
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Affiliation(s)
- Khaled A Nasr
- Department of Chemistry, Room 6-433, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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50
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Sood A, Abid M, Hailemichael S, Foster M, Török B, Török M. Effect of chirality of small molecule organofluorine inhibitors of amyloid self-assembly on inhibitor potency. Bioorg Med Chem Lett 2009; 19:6931-4. [PMID: 19880318 PMCID: PMC2785120 DOI: 10.1016/j.bmcl.2009.10.066] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 10/14/2009] [Accepted: 10/15/2009] [Indexed: 12/31/2022]
Abstract
The effect of enantiomeric trifluoromethyl-indolyl-acetic acid ethyl esters on the fibrillogenesis of Alzheimer's amyloid beta (Abeta) peptide is described. These compounds have been previously identified as effective inhibitors of the Abeta self-assembly in their racemic form. Thioflavin-T Fluorescence Spectroscopy and Atomic Force Microscopy were applied to assess the potency of the chiral target compounds. Both enantiomers showed significant inhibition in the in vitro assays. The potency of the enantiomeric inhibitors appeared to be very similar to each other suggesting the lack of the stereospecific binding interactions between these small molecule inhibitors and the Abeta peptide.
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Affiliation(s)
- Abha Sood
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Blvd. Boston, MA 02125-3393, USA
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