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Barrientos G, Schuman ML, Landa MS, Robello E, Incardona C, Conrad ML, Galleano M, García SI. Therapeutic Effect of Alpha Lipoic Acid in a Rat Preclinical Model of Preeclampsia: Focus on Maternal Signs, Fetal Growth and Placental Function. Antioxidants (Basel) 2024; 13:730. [PMID: 38929169 PMCID: PMC11200649 DOI: 10.3390/antiox13060730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/08/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open
Abstract
Chronic hypertension is a major risk factor for preeclampsia (PE), associated with significant maternal and neonatal morbidity. We previously demonstrated that pregnant stroke-prone spontaneously hypertensive rats (SHRSP) display a spontaneous PE-like phenotype with distinct placental, fetal, and maternal features. Here, we hypothesized that supplementation with alpha lipoic acid (ALA), a potent antioxidant, during early pregnancy could ameliorate the PE phenotype in this model. To test this hypothesis, timed pregnancies were established using 10 to 12-week-old SHRSP females (n = 19-16/group), which were assigned to two treatment groups: ALA (injected intraperitoneally with 25 mg/kg body weight ALA on gestation day (GD1, GD8, and GD12) or control, receiving saline following the same protocol. Our analysis of maternal signs showed that ALA prevented the pregnancy-dependent maternal blood pressure rise (GD14 blood pressure control 169.3 ± 19.4 mmHg vs. 146.1 ± 13.4 mmHg, p = 0.0001) and ameliorated renal function, as noted by the increased creatinine clearance and improved glomerular histology in treated dams. Treatment also improved the fetal growth restriction (FGR) phenotype, leading to increased fetal weights (ALA 2.19 ± 0.5 g vs. control 1.98 ± 0.3 g, p = 0.0074) and decreased cephalization indexes, indicating a more symmetric fetal growth pattern. This was associated with improved placental efficiency, decreased oxidative stress marker expression on GD14, and serum soluble fms-like tyrosine kinase 1 (sFlt1) levels on GD20. In conclusion, ALA supplementation mitigated maternal signs and improved placental function and fetal growth in SHRSP pregnancies, emerging as a promising therapy in pregnancies at high risk for PE.
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Affiliation(s)
- Gabriela Barrientos
- Laboratorio de Medicina Experimental, Hospital Alemán, Ciudad Autónoma de Buenos Aires C1118AAT, Argentina;
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires C1118AAT, Argentina
| | - Mariano L. Schuman
- Facultad de Medicina, Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires C1053ABH, Argentina; (M.L.S.); (M.S.L.)
- Departamento de Cardiología Molecular, Instituto de Investigaciones Médicas (IDIM), UBA-CONICET, Ciudad Autónoma de Buenos Aires C1427ARN, Argentina
| | - Maria S. Landa
- Facultad de Medicina, Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires C1053ABH, Argentina; (M.L.S.); (M.S.L.)
- Departamento de Cardiología Molecular, Instituto de Investigaciones Médicas (IDIM), UBA-CONICET, Ciudad Autónoma de Buenos Aires C1427ARN, Argentina
| | - Elizabeth Robello
- Facultad de Farmacia y Bioquímica, Cátedra de Fisicoquímica, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires C1053ABH, Argentina; (E.R.); (M.G.)
- Instituto de Bioquímica y Medicina Molecular-Dr. Alberto Boveris (IBIMOL), UBA-CONICET, Ciudad Autónoma de Buenos Aires C1113AAD, Argentina
| | - Claudio Incardona
- Fundación GADOR, Ciudad Autónoma de Buenos Aires C1414CUI, Argentina;
| | - Melanie L. Conrad
- Institute of Microbiology, Infectious Diseases and Immunology, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, 12203 Berlin, Germany;
| | - Monica Galleano
- Facultad de Farmacia y Bioquímica, Cátedra de Fisicoquímica, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires C1053ABH, Argentina; (E.R.); (M.G.)
- Instituto de Bioquímica y Medicina Molecular-Dr. Alberto Boveris (IBIMOL), UBA-CONICET, Ciudad Autónoma de Buenos Aires C1113AAD, Argentina
| | - Silvia I. García
- Laboratorio de Medicina Experimental, Hospital Alemán, Ciudad Autónoma de Buenos Aires C1118AAT, Argentina;
- Facultad de Medicina, Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires C1053ABH, Argentina; (M.L.S.); (M.S.L.)
- Departamento de Cardiología Molecular, Instituto de Investigaciones Médicas (IDIM), UBA-CONICET, Ciudad Autónoma de Buenos Aires C1427ARN, Argentina
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Namoju R, Chilaka KN. Protective effect of alpha‑lipoic acid against in utero cytarabine exposure-induced hepatotoxicity in rat female neonates. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03036-4. [PMID: 38459988 DOI: 10.1007/s00210-024-03036-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 03/01/2024] [Indexed: 03/11/2024]
Abstract
Cytarabine, an anti-metabolite drug, remains the mainstay of treatment for hematological malignancies. It causes various toxic effects including teratogenicity. Alpha lipoic acid (ALA) is a natural antioxidant reported to offer protection against hepatotoxicity induced by various pathological conditions, drugs, or chemicals. We investigated the protective effect of ALA against prenatal cytarabine exposure-induced hepatotoxicity in rat female neonates. A total of 30 dams were randomly assigned to five groups and received normal saline, ALA 200 mg/kg, cytarabine 12.5 mg/kg, cytarabine 25 mg/kg, and cytarabine 25 mg/kg + ALA 200 mg/kg, respectively, from gestational day (GD)8 to GD21. Cytarabine and ALA were administered via intraperitoneal and oral (gavage) routes, respectively. On postnatal day (PND)1, all the live female neonates (pups) were collected and weighed. The blood and liver from pups were carefully collected and used for histopathological, and biochemical evaluations. A significant and dose-dependent decrease in maternal food intake and weight gain was observed in the pregnant rats (dams) of the cytarabine groups as compared to the dams of the control group. The pups exposed to cytarabine showed a significant and dose-dependent (a) decrease in body weight, liver weight, hepatosomatic index, catalase, superoxide dismutase, glutathione, glutathione peroxidase, serum albumin levels and (b) increase in malondialdehyde, alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase, AST/ALT ratio, and histopathological anomalies. Maternal co-administration of ALA ameliorated these biochemical changes and histopathological abnormalities by combating oxidative stress. Future studies are warranted to explore the molecular mechanisms involved in the ALA's protective effects against prenatal cytarabine-induced hepatotoxicity.
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Affiliation(s)
- Ramanachary Namoju
- Department of Pharmacology, GITAM School of Pharmacy, GITAM Deemed to be University, Visakhapatnam, Andhra Pradesh, 530045, India.
- Department of Pharmacology, Bhaskar Pharmacy College, Jawaharlal Nehru Technical University, Hyderabad, Telangana, 500075, India.
| | - Kavitha N Chilaka
- Department of Pharmacology, GITAM School of Pharmacy, GITAM Deemed to be University, Visakhapatnam, Andhra Pradesh, 530045, India
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Valenzuela I, Kinoshita M, van der Merwe J, Maršál K, Deprest J. Prenatal interventions for fetal growth restriction in animal models: A systematic review. Placenta 2022; 126:90-113. [PMID: 35796064 DOI: 10.1016/j.placenta.2022.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 05/20/2022] [Accepted: 06/17/2022] [Indexed: 12/09/2022]
Abstract
Fetal growth restriction (FGR) in human pregnancy is associated with perinatal mortality, short- and long-term morbidities. No prenatal therapy is currently established despite decades of research. We aimed to review interventions in animal models for prenatal FGR treatment, and to seek the next steps for an effective clinical therapy. We registered our protocol and searched MEDLINE, Embase, and The Cochrane Library with no language restrictions, in accordance with the PRISMA guideline. We included all studies that reported the effects of any prenatal intervention in animal models of induced FGR. From 3257 screened studies, 202 describing 237 interventions were included for the final synthesis. Mice and rats were the most used animals (79%) followed by sheep (16%). Antioxidants (23%), followed by vasodilators (18%), nutrients (14%), and immunomodulators (12%) were the most tested therapy. Two-thirds of studies only reported delivery or immediate neonatal outcomes. Adverse effects were rarely reported (11%). Most studies (73%), independent of the intervention, showed a benefit in fetal survival or birthweight. The risk of bias was high, mostly due to the lack of randomization, allocation concealment, and blinding. Future research should aim to describe both short- and long-term outcomes across various organ systems in well-characterized models. Further efforts must be made to reduce selection, performance, and detection bias.
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Erdoğan F, Şenkal E, Özer ÖF, İpek İÖ, Altuntaş ŞL, Özde Ş. Oxidative stress in maternal milk and cord blood in gestational diabetes mellitus: a prospective study. SAO PAULO MED J 2022; 140:390-397. [PMID: 35508001 PMCID: PMC9671259 DOI: 10.1590/1516-3180.2021.0209.r1.25082021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 08/27/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Reduced antioxidant defenses may reflect a poor protective response against oxidative stress and this may be implicated in progression of gestational diabetes mellitus (GDM). Oxidative stress induced by hyperglycemia plays a major role in micro and macrovascular complications, which imply endothelial dysfunction. OBJECTIVE Our aim in this study was to investigate the association between GDM and oxidative stress markers measured in plasma, with regard to revealing changes to total antioxidant capacity (TAC) and total oxidant status (TOS) among mothers showing impairments in oral glucose tolerance tests (OGTTs). DESIGN AND SETTING Prospective study at a university hospital in Turkey. METHODS The study group consisted of 50 mothers with GDM, and 59 healthy mothers served as controls. Umbilical cord blood samples were taken from all mothers during delivery and breast milk samples on the fifth day after delivery. TAC, TOS, thiol and disulfide levels were measured. RESULTS No statistically significant relationship between the blood and milk samples could be found. An analysis on correlations between TAC, TOS and certain parameters revealed that there were negative correlations between TOS and total thiol (r = -0.386; P < 0.001) and between TOS and disulfide (r = -0.388; P < 0.001) in milk in the control group. However, these findings were not observed in the study group. CONCLUSION Our findings suggested that a compensatory mechanism of oxidative stress was expected to be present in gestational diabetes mellitus and that this might be ameliorated through good glycemic regulation and antioxidant supplementation.
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Affiliation(s)
- Fırat Erdoğan
- MD. Associate Professor, Department of Pediatrics, School of Medicine, Istanbul Medeniyet University, Istanbul, Turkey.
| | - Evrim Şenkal
- MD. Physician, Department of Pediatrics, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
| | - Ömer Faruk Özer
- MD. Physician, Department of Biochemistry, School of Medicine, Bezmiâlem Foundation University, Istanbul, Turkey.
| | - İlke Özahi İpek
- MD. Professor, Department of Pediatrics, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
| | - Şükriye Leyla Altuntaş
- MD. Physician, Department of Obstetrics and Gynecology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
| | - Şükriye Özde
- MD. Physician, Department of Pediatrics, School of Medicine, Düzce University, Düzce, Turkey.
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Namoju R, Chilaka NK. Maternal supplementation of α-lipoic acid attenuates prenatal cytarabine exposure-induced oxidative stress, steroidogenesis suppression and testicular damage in F1 male rat fetus. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2022. [DOI: 10.1186/s43088-022-00240-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Cytarabine (Ara-C) is an anticancer drug, which is considered as the mainstay in the treatment of hematological malignancies, known to cause various teratogenic effects. Alpha-lipoic acid (ALA) is a natural antioxidant and its supplementation proved to improve pregnancy outcomes in several pathological conditions. We aimed at exploring the benefits of maternal supplementation of ALA against in-utero Ara-C exposure-induced testicular toxicity in rat fetuses.
Methods
Pregnant rats (dams) received normal saline (control group), ALA 200 mg/kg (ALA group), Ara-C 12.5 mg/kg (Ara-C 12.5 group), Ara-C 25 mg/kg (Ara-C 25 group), and Ara-C 25 mg/kg + ALA 200 mg/kg (protection group) from gestational day (GD)8 to GD21. Ara-C and ALA were administered via the intraperitoneal and oral routes, respectively. The day of parturition was considered as postnatal day (PND)1. On PND1, all the live male pups were collected. The maternal parameters evaluated include (a) food intake, (b) bodyweight, and (c) oxidative stress (OS) markers. The fetal parameters evaluated include (a) bodyweight, (b) anogenital distances (AGD), (c) testicular weight (d) testicular testosterone levels (e) testicular histopathology, and (f) morphometrical parameters.
Results
A significant and dose-dependent decrease in maternal food intake, weight gain, and an increase in oxidative stress (OS) were observed in the pregnant rats of the Ara-C groups as compared to pregnant rats of the control group. Further, a significant and dose-dependent (a) reduction in bodyweight, AGD, testicular weight, and testosterone levels, (b) increase in OS, and (c) structural and morphometrical anomalies in fetal testes were observed in fetuses of Ara-C groups as compared to fetuses of the control rats. These deleterious effects observed in the Ara-C groups were found to be diminished in the pregnant rats and fetuses of the Protection group as compared to the pregnant rats and fetuses of the Ara-C 25 group.
Conclusions
From the results of this study, we conclude that the maternal supplementation of ALA may ameliorate the Ara-C exposure-induced impairment in prenatal development and function of the testes in the rat fetuses. However, future experimental and clinical studies are warranted to explore the possible mechanisms involved in the protection offered by maternal supplementation of ALA against Ara-C induced testicular toxicity.
Graphical Abstract
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Chirino-Galindo G, López-Quintero IV, Ramírez-Domínguez LB, Cabrera-Nájera LE, Estrella-Parra EA, García-Bores AM, Palomar-Morales M. Verbascoside-enriched fraction from Buddleja cordata Kunth ameliorates the effects of diabetic embryopathy in an animal model. Birth Defects Res 2021; 113:981-994. [PMID: 33750035 DOI: 10.1002/bdr2.1894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 02/24/2021] [Accepted: 03/14/2021] [Indexed: 11/08/2022]
Abstract
BACKGROUND The deleterious effects of diabetes mellitus (DM) over development are apparently due to an increase in oxidative stress. Some antioxidants could prevent developmental alterations produced by diabetic state. Extracts of plants of the genus Buddleja are used traditionally for Mexican indigens to ameliorate some diseases. The purpose of this work was to evaluate the effect of the extract of Buddleja cordata over diabetic embryopathy. METHODS Two experimental approaches were used: an in vivo study and an in vitro model. In the first, rats were treated with streptozotocin, streptozotocin plus methanolic extract of B. cordata, or none. Females were sacrificed at gestational day (GD) 19, and biochemical clinical parameters were measured; also, the fetuses were obtained and morphologically analyzed. In the in vitro model, a verbascoside-enriched fraction (VEF) of the extract was used in whole embryo culture in order to search for the mechanisms for embryoprotection effect over hyperglycemia-induced malformations. RESULTS In the in vivo experiments, B. cordata extract reduces the frequency and severity of fetal malformations produced by chemically induced diabetes, and additionally partially ameliorates the diabetic condition; in the in vitro model, both severity and frequency of embryo dysmorphogenesis were reduced by the VEF; also, this fraction reduces lipoperoxidation without affecting the activity of the antioxidant enzymes. CONCLUSION The results suggest that verbascoside of methanolic extract and enriched fraction can directly affect the redox state, and thus, prevents the embryotoxicity mediated by oxidative stress, in embryos of diabetic pregnancy.
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Affiliation(s)
- Gladys Chirino-Galindo
- Laboratorio de Metabolismo de la Diabetes Mellitus, Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México, Mexico
| | - Ilse-Valeria López-Quintero
- Laboratorio de Metabolismo de la Diabetes Mellitus, Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México, Mexico
| | - Liliana-Berenice Ramírez-Domínguez
- Laboratorio de Metabolismo de la Diabetes Mellitus, Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México, Mexico
| | - Leonardo-Elías Cabrera-Nájera
- Laboratorio de Metabolismo de la Diabetes Mellitus, Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México, Mexico
| | - Edgar-Antonio Estrella-Parra
- Laboratorio de Fitoquímica, Unidad de Biología y Prototipos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México, Mexico
| | - Ana-María García-Bores
- Laboratorio de Fitoquímica, Unidad de Biología y Prototipos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México, Mexico
| | - Martín Palomar-Morales
- Laboratorio de Metabolismo de la Diabetes Mellitus, Unidad de Morfofisiología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, México, Mexico
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Namoju R, Chilaka NK. Alpha-lipoic acid ameliorates cytarabine-induced developmental anomalies in rat fetus. Hum Exp Toxicol 2020; 40:851-868. [PMID: 33225757 DOI: 10.1177/0960327120975114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cytarabine (Ara-C) is a nucleoside analogue used in the treatment of cancers and viral infections. It has teratogenic potential and causes a variety of birth defects in fetuses. Alpha-lipoic acid (ALA) is a natural antioxidant offers protection against the developmental toxicity induced by drug- or toxicant-exposure or pathological conditions. This study was aimed at evaluating the protective effect of ALA against Ara-C induced developmental toxicity in rat fetus. Pregnant rats divided into five groups and received normal saline, ALA200 mg/kg, Ara-C12.5 mg/kg, Ara-C25 mg/kg and, Ara-C25 mg/kg plus ALA200 mg/kg respectively from gestational day (GD) 8 to GD14 and sacrificed on GD21. Ara-C treatment led to a significant and dose-dependent decrease in food intake, weight gain, placental weight, and an increase in oxidative stress in pregnant rats. Further, the in-utero exposure to Ara-C led to an increase in fetal mortality, resorptions, oxidative stress, external morphological anomalies and limb abnormalities, and impaired ossification. Co-administration of ALA resulted in amelioration of the footprints of Ara-C induced toxicity in pregnant rats as well as the fetus. These findings indicate that the ALA supplementation offers protection against developmental toxicity caused by Ara-C prenatal exposure in rats.
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Affiliation(s)
- Ramanachary Namoju
- Department of Pharmacology, 78997GITAM Institute of Pharmacy, GITAM Deemed to be University, Vishakhapatnam, Andhra Pradesh, India.,Department of Pharmacology, Bhaskar Pharmacy College, Jawaharlal Nehru Technical University, Hyderabad, Telangana, India
| | - Naga Kavitha Chilaka
- Department of Pharmacology, 78997GITAM Institute of Pharmacy, GITAM Deemed to be University, Vishakhapatnam, Andhra Pradesh, India
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Erdem Guzel E, Kaya N, Tektemur A, Ulker N, Yardimci A, Akkoc RF, Canpolat S, Ozan IE. Chronic effects of maternal tobacco-smoke exposure and/or α-lipoic acid treatment on reproductive parameters in female rat offspring. Syst Biol Reprod Med 2020; 66:387-399. [PMID: 32951465 DOI: 10.1080/19396368.2020.1815248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Prenatal tobacco-smoke exposure negatively affects the reproductive functions of female offspring and oxidative stress plays a major role at this point. Alpha-lipoic acid (ALA), well known as a biological antioxidant, has been used as a nutritional supplement and as a therapeutic agent in the treatment of certain complications during pregnancy. We aimed to investigate the effects of maternal tobacco-smoke exposure and/or ALA administration on puberty onset, sexual behavior, gonadotrophin levels, apoptosis-related genes, apoptotic cell numbers and oxidative stress markers in the adult female rat offspring. Sprague-Dawley rats were divided into four groups; control, tobacco smoke (TS), TS+ALA and ALA groups. Animals were exposed to TS and/or ALA for 8 weeks before pregnancy and throughout pregnancy. All treatments ended with birth and later newborn female rats were selected for each experimental group. The experiment ended at postnatal day 74-77. Maternal tobacco smoke advanced the onset of puberty in the female offspring of the TS group (p < 0.05). In all treatment groups; the mean number of anogenital investigations and lordosis quality scores showed a decline, serum luteinizing hormone levels significantly increased (p < 0.05) and several histopathological changes in ovaries were observed compared to the control group. In addition, an increase in apoptotic marker levels and apoptotic cell numbers was detected in the ovaries of all treatment groups. Decreased TAS and increased TOS levels were detected in all treatment groups compared to control. These findings suggested that maternal tobacco smoke and/or ALA administration may be leading to the impaired reproductive health of female offspring. Abbreviations: ALA: alpha-lipoic acid; LH: luteinizing hormone; FSH: follicle-stimulating hormone; TAS: total antioxidant status; TOS: total oxidant status; Apaf1: apoptotic protease-activating factor 1; Casp3: caspase 3; Casp9: caspase 9; CF: cyst follicles; 4-HNE: 4-Hidroxynonenal; 8-OHdG: 8-hydroxydeoxyguanosine; TUNEL: terminal deoxynucleotidyl transferase-mediated deoxyuridine-biotin nick end labeling; ROS: reactive oxygen species; GnRHR: gonadotropin-releasing hormone receptor; HPG: hypothalamic-pituitary-gonadal; AMPK: AMP-activated protein kinase; ELISA: enzyme-linked immunosorbent assay; cDNA: complementary DNA; qPCR: quantitative real-time PCR; FC: follicular cysts; PF: primary follicle; SF: secondary follicle; GF: graafian follicle; CL: corpus luteum; DF: degenerated follicle; AF: atretic follicle.
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Affiliation(s)
- Elif Erdem Guzel
- Department of Midwifery, Faculty of Health Sciences, Mardin Artuklu University , Mardin, Turkey
| | - Nalan Kaya
- Department of Histology and Embryology, Faculty of Medicine, Firat University , Elazig, Turkey
| | - Ahmet Tektemur
- Department of Medical Biology, Faculty of Medicine, Firat University , Elazig, Turkey
| | - Nazife Ulker
- Department of Physiology, Faculty of Medicine, Firat University , Elazig, Turkey
| | - Ahmet Yardimci
- Department of Physiology, Faculty of Medicine, Firat University , Elazig, Turkey
| | - Ramazan Fazil Akkoc
- Department of Anatomy, Faculty of Medicine, Firat University , Elazig, Turkey
| | - Sinan Canpolat
- Department of Physiology, Faculty of Medicine, Firat University , Elazig, Turkey
| | - Ibrahim Enver Ozan
- Department of Histology and Embryology, Faculty of Medicine, Firat University , Elazig, Turkey
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Dai H, Lv Z, Hu C, Shi Z, Wei X, Jin S, Yuan Y, Yu D, Shi F. Alpha-lipoic acid improves the reproduction performance of breeder hens during the late egg-laying period. J Anim Physiol Anim Nutr (Berl) 2020; 104:1788-1797. [PMID: 32881138 DOI: 10.1111/jpn.13423] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/13/2020] [Accepted: 06/13/2020] [Indexed: 01/04/2023]
Abstract
Alpha-lipoic acid (ALA), a multifunctional antioxidant, can promote fatty acid mobilization, energy expenditure and scavenge free radicals. The effects of dietary ALA on the reproductive performance of breeder hens were investigated in the current study. In the 5-week experiment, 180 54-week-old Qiling breeder hens were randomly divided into three treatments with five replicates and supplemented with three levels of ALA (0, 300 and 600 mg/kg) in the basic corn-soya bean meal diets. 600 mg/kg ALA treatment group (HLA) significantly improved the eggshell thickness and strength (p < .05). ALA-treated groups improved egg-laying rate compared with the CON group, but with no statistically significant difference (p > .05). The levels of HDL-C, ALB and estradiol (E2) of the serum in the HLA group were elevated compared with the CON group (p < .05). In addition, ALA (600 mg/kg) treatment exhibited a reduced level of serum AST and TG (p < .05). Dietary ALA increased the activity of hepatic lipase in liver (p < .05). Supplemental 600 mg/kg ALA also improved the SOD activity and total antioxidant capacity level, along with a decreased MDA in ovarian tissue (p < .05). Furthermore, the mRNA expressions of ESR1, ESR2, VTG2 and ApoB in the liver and FSHR in follicles were upregulated in the HLA group (p < .05). In conclusion, dietary supplementation with 600 mg/kg ALA during the late egg-laying period could improve lipid metabolism and reproductive performance of breeder hens.
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Affiliation(s)
- Hongjian Dai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Zengpeng Lv
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Chenhui Hu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Zhicheng Shi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Xihui Wei
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Song Jin
- Changzhou Animal Disease Control Center, Bureau of Agriculture and Rural Affairs of Changzhou, Jiangsu, China
| | - Yunwei Yuan
- Jiangsu Hesheng Food Limited Company, Taizhou, China
| | - Debing Yu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Fangxiong Shi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.,National Experimental Teaching Demonstration Center of Animal Science, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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Verheijen N, Suttorp CM, van Rheden REM, Regan RF, Helmich MPAC, Kuijpers-Jagtman AM, Wagener FADTG. CXCL12-CXCR4 Interplay Facilitates Palatal Osteogenesis in Mice. Front Cell Dev Biol 2020; 8:771. [PMID: 32974338 PMCID: PMC7471603 DOI: 10.3389/fcell.2020.00771] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 07/22/2020] [Indexed: 12/19/2022] Open
Abstract
Cranial neural crest cells (CNCCs), identified by expression of transcription factor Sox9, migrate to the first branchial arch and undergo proliferation and differentiation to form the cartilage and bone structures of the orofacial region, including the palatal bone. Sox9 promotes osteogenic differentiation and stimulates CXCL12-CXCR4 chemokine-receptor signaling, which elevates alkaline phosphatase (ALP)-activity in osteoblasts to initiate bone mineralization. Disintegration of the midline epithelial seam (MES) is crucial for palatal fusion. Since we earlier demonstrated chemokine-receptor mediated signaling by the MES, we hypothesized that chemokine CXCL12 is expressed by the disintegrating MES to promote the formation of an osteogenic center by CXCR4-positive osteoblasts. Disturbed migration of CNCCs by excess oxidative and inflammatory stress is associated with increased risk of cleft lip and palate (CLP). The cytoprotective heme oxygenase (HO) enzymes are powerful guardians harnessing injurious oxidative and inflammatory stressors and enhances osteogenic ALP-activity. By contrast, abrogation of HO-1 or HO-2 expression promotes pregnancy pathologies. We postulate that Sox9, CXCR4, and HO-1 are expressed in the ALP-activity positive osteogenic regions within the CNCCs-derived palatal mesenchyme. To investigate these hypotheses, we studied expression of Sox9, CXCL12, CXCR4, and HO-1 in relation to palatal osteogenesis between E15 and E16 using (immuno)histochemical staining of coronal palatal sections in wild-type (wt) mice. In addition, the effects of abrogated HO-2 expression in HO-2 KO mice and inhibited HO-1 and HO-2 activity by administrating HO-enzyme activity inhibitor SnMP at E11 in wt mice were investigated at E15 or E16 following palatal fusion. Overexpression of Sox9, CXCL12, CXCR4, and HO-1 was detected in the ALP-activity positive osteogenic regions within the palatal mesenchyme. Overexpression of Sox9 and CXCL12 by the disintegrating MES was detected. Neither palatal fusion nor MES disintegration seemed affected by either HO-2 abrogation or inhibition of HO-activity. Sox9 progenitors seem important to maintain the CXCR4-positive osteoblast pool to drive osteogenesis. Sox9 expression may facilitate MES disintegration and palatal fusion by promoting epithelial-to-mesenchymal transformation (EMT). CXCL12 expression by the MES and the palatal mesenchyme may promote osteogenic differentiation to create osteogenic centers. This study provides novel evidence that CXCL12-CXCR4 interplay facilitates palatal osteogenesis and palatal fusion in mice.
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Affiliation(s)
- Nanne Verheijen
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Christiaan M Suttorp
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands.,Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - René E M van Rheden
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Raymond F Regan
- Department of Emergency Medicine, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Maria P A C Helmich
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Anne Marie Kuijpers-Jagtman
- Department of Orthodontics, University of Groningen, University Medical Center Groningen, Groningen, Netherlands.,Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Bern, Switzerland.,Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia
| | - Frank A D T G Wagener
- Department of Dentistry - Orthodontics and Craniofacial Biology, Radboud University Medical Center, Nijmegen, Netherlands.,Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
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11
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Yardimci A, Akkoc RF, Tektemur A, Ulker N, Kaya Tektemur N, Erdem Guzel E, Canpolat S, Ozan IE. Chronic Maternal Tobacco Smoke Exposure and/or Alpha-Lipoic Acid Treatment Causes Long-Term Deterioration of Testis and Sexual Behavior in Adult Male Rats. J Sex Med 2020; 17:1835-1847. [PMID: 32798198 DOI: 10.1016/j.jsxm.2020.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 06/26/2020] [Accepted: 07/01/2020] [Indexed: 11/18/2022]
Abstract
BACKGROUND Tobacco use during pregnancy is known to have several negative effects on the offspring's reproductive health in the long term. The use of alpha-lipoic acid (ALA) as a dietary supplement during pregnancy has increased greatly in recent years and has been known to have positive effects on various pregnancy outcomes including miscarriage, diabetic embryopathy, preterm delivery, and congenital malformations. AIM To evaluate the effects of tobacco smoke exposure (TSE) on sexual behavior, reproductive parameters, and testicles in adult male rats and to reveal the possible role of ALA administration on these parameters. METHODS Pregnant rats (n = 7 per group) were treated with tobacco smoke (TS), ALA (20 mg/kg), and TS + ALA for a total of 11 weeks. The following parameters were compared with 8 control rats: puberty parameters, sexual behavior; levels of serum gonadotropins and testosterone, total antioxidant status, and total oxidant status; the expression of the apoptotic protease-activating factor-1 and caspase 9 mRNA levels in the testis; and assessment of immunohistochemistry and terminal deoxynucleotidyl transferase dUTP nick end labeling assay of testis. MAIN OUTCOME MEASURE Sexual behavior, changes in puberty parameters, and hormonal and genetic alterations were the outcomes analyzed in this study. RESULTS Maternal TSE caused a significant decrease in the number of intromissions compared to the control group. Similarly, ALA decreased erectile function in sexual behavior by decreasing the number of intromissions and intromission ratio in the ALA group compared to the control group. In addition, TSE and ALA treatment caused an impairment of some consummatory sexual behaviors. Also, in parallel with this inhibitory effect, the age of pubertal onset was significantly delayed in the TS + ALA group compared to other groups. Also, histopathological changes in testicular tissue, oxidative stress markers, apoptotic index, and mRNA levels of apoptosis-related genes increased in all treatment groups. CLINICAL IMPLICATIONS The use of ALA and/or tobacco products during pregnancy may adversely affect the reproductive health of male newborns in the long term. STRENGTHS & LIMITATIONS To the best of our knowledge, this study is the first to show the effects of maternal ALA treatment and/or TSE on the sexual behavior and reproductive parameters in male rats; however, the study is based on an animal model, and the present findings partially reflect the characteristics of human sexual behavior. CONCLUSION Maternal TSE and/or ALA treatment may impair sexual behavior in adulthood in male rats because of testicular damage caused by oxidative stress during gonadal development. Yardimci A, Akkoc RF, Tektemur A, et al. Chronic Maternal Tobacco Smoke Exposure and/or Alpha-Lipoic Acid Treatment Causes Long-Term Deterioration of Testis and Sexual Behavior in Adult Male Rats. J Sex Med 2020;17:1835-1847.
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Affiliation(s)
- Ahmet Yardimci
- Department of Physiology, Faculty of Medicine, Firat University, Elazig, Turkey.
| | - Ramazan Fazil Akkoc
- Department of Anatomy, Faculty of Medicine, Firat University, Elazig, Turkey
| | - Ahmet Tektemur
- Department of Medical Biology, Faculty of Medicine, Firat University, Elazig, Turkey
| | - Nazife Ulker
- Department of Physiology, Faculty of Medicine, Firat University, Elazig, Turkey
| | - Nalan Kaya Tektemur
- Department of Histology and Embryology, Faculty of Medicine, Firat University, Elazig, Turkey
| | - Elif Erdem Guzel
- Department of Midwifery, Faculty of Health Sciences, Mardin Artuklu University, Mardin, Turkey
| | - Sinan Canpolat
- Department of Physiology, Faculty of Medicine, Firat University, Elazig, Turkey
| | - Ibrahim Enver Ozan
- Department of Histology and Embryology, Faculty of Medicine, Firat University, Elazig, Turkey
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12
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Moore RM, Katri R, Kumar D, Mansour JM, Mercer B, Moore JJ. α-Lipoic acid blocks the GMCSF induced protease/protease inhibitor spectrum associated with fetal membrane weakening in-vitro. Placenta 2020; 97:79-88. [PMID: 32792069 DOI: 10.1016/j.placenta.2020.06.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/09/2020] [Accepted: 06/25/2020] [Indexed: 01/08/2023]
Abstract
INTRODUCTION We use an in-vitro human fetal membrane (FM) explant-based model to study inflammation-induced FM weakening, a prerequisite for PPROM. In this system, GMCSF is a critical intermediate, both necessary and sufficient for TNFα and thrombin induced FM weakening. α-Lipoic-acid (LA) blocks TNFα and thrombin, as well as GMCSF-induced weakening. Recently, we reported LA concomitantly blocks GMCSF-induction of MMPs 2, 9 and 10 and inhibition of TIMPs 1-3. The aim of this study was to show that LA blocks GMCSF-induced increases in additional proteases and reductions in additional protease inhibitors. METHODS FM fragments were cultured±LA and then±GMCSF. In other experiments, weak versus strong, fresh FM were cultured without additions. Fragments were strength tested and media analyzed by multiplex protein ELISA for proteases and protease inhibitors. RESULTS GMCSF induced FM weakening and concomitantly increased several Proteases (Cathepsin-S, Proteinase-3, Elastase-2) and decreased several protease inhibitors (NGAL, Cystatin-C, HE4 and Thrombospondin1). LA inhibited GMCSF-induced FM weakening and all enzymatic changes. Untreated weaker versus stronger regions of fresh FM showed comparable differences in proteases and protease inhibitor patterns to GMCSF-stimulated versus controls. CONCLUSION LA blocks GMCSF-induced human FM weakening and associated protease increases and inhibitor decreases. The GMCSF-induced spectrum of protease/protease-inhibitor changes is similar to that in the natural weak FM fragments. In concert with previously reported GMCSF-induced changes in MMPs & TIMPs, these other protease and protease-inhibitor changes presumably facilitate FM weakening and rupture. LA blocks these GMCSF effects and therefore may be a useful agent to prevent PPROM.
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Affiliation(s)
- R M Moore
- Department of Pediatrics, Case Western Reserve University, MetroHealth Medical Center, 44109, Cleveland, OH, USA
| | - R Katri
- Miami University, MetroHealth Medical Center, 44109, Oxford, OH, USA
| | - D Kumar
- Department of Pediatrics, Case Western Reserve University, MetroHealth Medical Center, 44109, Cleveland, OH, USA
| | - J M Mansour
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, 100900 Euclid Ave, 44106, Cleveland, OH, USA
| | - B Mercer
- Department of Reproductive Biology, Case Western Reserve University, MetroHealth Medical Center, 44109, Cleveland, OH, USA
| | - J J Moore
- Department of Pediatrics, Case Western Reserve University, MetroHealth Medical Center, 44109, Cleveland, OH, USA; Department of Reproductive Biology, Case Western Reserve University, MetroHealth Medical Center, 44109, Cleveland, OH, USA.
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13
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Granulocyte macrophage colony stimulating factor (GM-CSF), the critical intermediate of inflammation-induced fetal membrane weakening, primarily exerts its weakening effect on the choriodecidua rather than the amnion. Placenta 2019; 89:1-7. [PMID: 31665659 DOI: 10.1016/j.placenta.2019.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/02/2019] [Accepted: 10/04/2019] [Indexed: 12/21/2022]
Abstract
INTRODUCTION We have previously demonstrated two associations of PPROM, (1) inflammation/infection (modeled by tumor necrosis factor (TNF)) and (2) decidual bleeding (modeled by thrombin), both decrease fetal membrane (FM) rupture strength in-vitro. Furthermore, Granulocyte-Macrophage-Colony-Stimulating-Factor (GM-CSF) induced by both TNF and thrombin is a critical intermediate, necessary and sufficient for weakening by either agent. The amnion is the strength component of FM and must weaken for FM to rupture. It is unclear whether GM-CSF weakens amnion (AM) directly, or initially targets choriodecidua (CD) which secondarily releases agents to act on amnion. METHODS Full thickness FM fragments were treated with/without GM-CSF. Some were preincubated with alpha-lipoic acid (LA), a known inhibitor of FM weakening. The FM fragments were then strength-tested. Separately, FM fragments were initially separated to AM and CD. AM fragments were cultured with Medium ± GM-CSF and then strength-tested. In other experiments, CD fragments were cultured with Medium, GM-CSF, LA, or LA + GM-CSF. Conditioned medium from each group was then incubated with AM. AM was then strength-tested. Matrix Metalloproteinases (MMPs) and Tissue Inhibitors of Matrix Metalloproteinases (TIMPs) were analyzed by Mutiplex Elisa. RESULTS GM-CSF weakened intact FM which was blocked by LA. GM-CSF did not weaken isolated AM. However, GM-CSF conditioned CD media weakened AM and this weakening was inhibited by LA. GM-CSF treatment of CD increased MMPs 2, 9, and 10, and decreased TIMPs 1-3. LA reversed these effects. CONCLUSIONS GM-CSF does not weaken amnion directly; GM-CSF acts on CD to increase proteases and decrease anti-proteases which secondarily weaken the amnion.
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14
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Nalbandyan M, Howley MM, Cunniff CM, Romitti PA, Browne ML. Descriptive and risk factor analysis of nonsyndromic sacral agenesis: National Birth Defects Prevention Study, 1997-2011. Am J Med Genet A 2019; 179:1799-1814. [PMID: 31294918 DOI: 10.1002/ajmg.a.61290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/16/2019] [Accepted: 06/23/2019] [Indexed: 11/10/2022]
Abstract
Sacral agenesis is a rare birth defect characterized by partial or complete absence of the sacrum. We sought to (a) describe case characteristics, (b) estimate birth prevalence, and (c) identify risk factors for nonsyndromic sacral agenesis using data from the National Birth Defects Prevention Study (NBDPS). The NBDPS was a population-based, case-control study involving pregnancies with estimated dates of delivery from October 1997 through December 2011. We estimated birth prevalence using all NBDPS eligible cases. Using self-reported maternal exposure information, we conducted multivariable logistic regression analysis to identify potential risk factors overall and among women without diabetes. The birth prevalence of sacral agenesis was 2.6/100,000 live births. In the multivariable analysis, multifetal pregnancy, pre-existing Type 1 diabetes, and pre-existing Type 2 diabetes were positively and significantly associated with sacral agenesis, albeit estimates were imprecise. Preexisting Type 1 diabetes was the strongest risk factor (adjusted odds ratio = 96.6, 95% confidence interval = 43.5-214.7). Among women without diabetes, periconceptional smoking was positively and significantly associated with sacral agenesis. Our findings underscore the importance of smoking cessation programs among women planning pregnancy and the importance of better understanding the role of glycemic control before and during pregnancy when designing interventions for primary prevention of sacral agenesis.
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Affiliation(s)
- Marine Nalbandyan
- New York State Department of Health, Congenital Malformations Registry, Albany, New York.,Department of Epidemiology and Biostatistics, School of Public Health, University at Albany, Rensselaer, New York
| | - Meredith M Howley
- New York State Department of Health, Congenital Malformations Registry, Albany, New York
| | - Christopher M Cunniff
- Division of Medical Genetics, Department of Pediatrics, New York-Presbyterian Hospital/Weill Cornell Medicine, New York, New York
| | - Paul A Romitti
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa
| | - Marilyn L Browne
- New York State Department of Health, Congenital Malformations Registry, Albany, New York.,Department of Epidemiology and Biostatistics, School of Public Health, University at Albany, Rensselaer, New York
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15
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Formoso G, Baldassarre MP, Ginestra F, Carlucci MA, Bucci I, Consoli A. Inositol and antioxidant supplementation: Safety and efficacy in pregnancy. Diabetes Metab Res Rev 2019; 35:e3154. [PMID: 30889626 PMCID: PMC6617769 DOI: 10.1002/dmrr.3154] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 02/20/2019] [Accepted: 03/10/2019] [Indexed: 12/15/2022]
Abstract
Pregnancies complicated by diabetes have largely increased in number over the last 50 years. Pregnancy is characterized by a physiologic increase in insulin resistance, which, associated with increased oxidative stress and inflammations, could induce alterations of glucose metabolism and diabetes. If not optimally controlled, these conditions have a negative impact on maternal and foetal outcomes. To date, one can resort only to diet and lifestyle to treat obesity and insulin resistance during pregnancy, and insulin remains the only therapeutic option to manage diabetes during pregnancy. However, in the last years, in a variety of experimental models, inositol and antioxidants supplementation have shown insulin-sensitizing, anti-inflammatory, and antioxidant properties, which could be mediated by some possible complementary mechanism of action. Different isomers and multiple combinations of these compounds are presently available: Aim of the present review article is to examine the existing evidence in order to clarify and/or define the effects of different inositol- and antioxidant-based supplements during pregnancy complicated by insulin resistance and/or by diabetes. This could help the clinician's evaluation and choice of the appropriate supplementation regimen.
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Affiliation(s)
- Gloria Formoso
- Department of Medicine and Aging Sciences and Centro Scienze dell'Invecchiamento‐Medicina Traslazionale (CeSI‐MeT)University G. D'AnnunzioChietiItaly
| | - Maria P.A. Baldassarre
- Department of Medicine and Aging Sciences and Centro Scienze dell'Invecchiamento‐Medicina Traslazionale (CeSI‐MeT)University G. D'AnnunzioChietiItaly
| | - Federica Ginestra
- Department of Medicine and Aging Sciences and Centro Scienze dell'Invecchiamento‐Medicina Traslazionale (CeSI‐MeT)University G. D'AnnunzioChietiItaly
| | - Maria Assunta Carlucci
- Department of Medicine and Aging Sciences and Centro Scienze dell'Invecchiamento‐Medicina Traslazionale (CeSI‐MeT)University G. D'AnnunzioChietiItaly
| | - Ines Bucci
- Department of Medicine and Aging Sciences and Centro Scienze dell'Invecchiamento‐Medicina Traslazionale (CeSI‐MeT)University G. D'AnnunzioChietiItaly
| | - Agostino Consoli
- Department of Medicine and Aging Sciences and Centro Scienze dell'Invecchiamento‐Medicina Traslazionale (CeSI‐MeT)University G. D'AnnunzioChietiItaly
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Han L, Jiang Z, Zheng X, Qiu J, Hu Y, Li X. Progress in Development of Interventions to Prevent Birth Defects in Diabetic Pregnancies. Chem Pharm Bull (Tokyo) 2019; 67:648-653. [DOI: 10.1248/cpb.c18-01013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Zhe Jiang
- Yanbian University Hospital
- Yanbian University College of Pharmacy
| | | | - Jun Qiu
- Yanbian University Hospital
- Yanbian University College of Pharmacy
| | - Yawen Hu
- Yanbian University Hospital
- Yanbian University College of Pharmacy
| | - Xuezheng Li
- Yanbian University Hospital
- Yanbian University College of Pharmacy
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17
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Güzel EE, Kaya N, Kocamüftüoğlu GO, Kısaçam MA, Dabak DÖ, Ozan İE. Gebelikte Tütün Dumanı Maruziyetinin Anne Sıçan Akciğer Dokusunda Meydana Getirdiği Değişiklikler Üzerine Alfa Lipoik Asitin Etkilerinin İncelenmesi. DICLE MEDICAL JOURNAL 2018. [DOI: 10.5798/dicletip.457249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Di Tucci C, Di Feliciantonio M, Vena F, Capone C, Schiavi MC, Pietrangeli D, Muzii L, Benedetti Panici P. Alpha lipoic acid in obstetrics and gynecology. Gynecol Endocrinol 2018; 34:729-733. [PMID: 29726290 DOI: 10.1080/09513590.2018.1462320] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
Alpha-Lipoic acid (ALA) is a natural antioxidant synthetized by plants and animals, identified as a catalytic agent for oxidative decarboxylation of pyruvate and α-ketoglutarate. In this review, we analyzed the action of ALA in gynecology and obstetrics focusing in particular on neuropathic pain and antioxidant and anti-inflammatory action. A comprehensive literature search was performed in PubMed and Cochrane Library for retrieving articles in English language on the antioxidant and anti-inflammatory effects of ALA in gynecological and obstetrical conditions. ALA reduces oxidative stress and insulin resistance in women with polycystic ovary syndrome (PCOS). The association of N-acetyl cysteine (NAC), alpha-lipoic acid (ALA), and bromelain (Br) is used for prevention and treatment of endometriosis. In association with omega-3 polyunsaturated fatty acids (n-3 PUFAs) with amitriptyline is used for treatment of vestibulodynia/painful bladder syndrome (VBD/PBS). A promising area of research is ALA supplementation in patients with threatened miscarriage to improve the subchorionic hematoma resorption. Furthermore, ALA could be used in prevention of diabetic embryopathy and premature rupture of fetal membranes induced by inflamation. In conclusion, ALA can be safely used for treatment of neuropatic pain and as a dietary support during pregnancy.
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Affiliation(s)
- Chiara Di Tucci
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
| | - Mara Di Feliciantonio
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
| | - Flaminia Vena
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
| | - Carmela Capone
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
| | - Michele Carlo Schiavi
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
| | - Daniela Pietrangeli
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
| | - Ludovico Muzii
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
| | - Pierluigi Benedetti Panici
- a Department of Gynecological, Obstetrical and Urological Sciences , ''Sapienza'' University of Rome , Rome , Italy
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Kumar D, Moore RM, Sharma A, Mercer BM, Mansour JM, Moore JJ. In an in-vitro model using human fetal membranes, α-lipoic acid inhibits inflammation induced fetal membrane weakening. Placenta 2018; 68:9-14. [PMID: 30055672 DOI: 10.1016/j.placenta.2018.06.305] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/04/2018] [Accepted: 06/18/2018] [Indexed: 12/20/2022]
Abstract
INTRODUCTION We established an in-vitro model for the study of human fetal membrane (FM) weakening leading to pPROM. In this model, granulocyte-macrophage colony-stimulating factor (GM-CSF) is a critical intermediate for both tumor necrosis factor-α (TNF; modeling infection/inflammation) and thrombin (modeling decidual bleeding/abruption)-induced weakening. Thus, inhibitors of FM weakening can be categorized as targeting GM-CSF production, GM-CSF downstream action, or both. Most progestogens inhibit both, except 17-α hydroxyprogesterone caproate which inhibits FM weakening at only one point, GM-CSF production. α-lipoic acid (LA), an over-the-counter dietary supplement, has also been previously shown to inhibit TNF and thrombin induced FM weakening. OBJECTIVE To determine the point of action of LA inhibition of FM weakening. METHODS FM fragments were mounted in Transwell inserts and preincubated with/without LA/24 h, then with/without addition of TNF, thrombin or GM-CSF. After 48 h, medium was assayed for GM-CSF, and FM fragments were rupture-strength tested. RESULTS TNF and thrombin both weakened FM and increased GM-CSF levels. GM-CSF also weakened FM. LA inhibited both TNF and thrombin induced FM weakening and concomitantly inhibited the increase in GM-CSF in a concentration-dependent manner. In addition, LA inhibited GM-CSF induced FM weakening in a concentration dependent manner. CONCLUSIONS LA blocks TNF and thrombin induced FM weakening at two points, inhibiting both GM-CSF production and downstream action. Thus, we speculate that LA may be a potential standalone therapeutic agent, or supplement to current therapy for prevention of pPROM related spontaneous preterm birth, if preclinical studies to examine feasibility and safety during pregnancy are successfully accomplished.
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Affiliation(s)
- Deepak Kumar
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Robert M Moore
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Anudeepa Sharma
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Brian M Mercer
- Reproductive Biology, Case Western Reserve University, Cleveland, OH, USA
| | - Joseph M Mansour
- Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - John J Moore
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA; Reproductive Biology, Case Western Reserve University, Cleveland, OH, USA.
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20
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Guzel EE, Kaya N, Ozan G, Tektemur A, Dabak DO, Ozan IE. The investigation of effect of alpha lipoic acid against damage on neonatal rat lung to maternal tobacco smoke exposure. Toxicol Rep 2018; 5:714-722. [PMID: 29984187 PMCID: PMC6031852 DOI: 10.1016/j.toxrep.2018.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 05/22/2018] [Accepted: 05/30/2018] [Indexed: 10/30/2022] Open
Abstract
This study was carried out to determine the changes in the lungs of the rat pups exposed to tobacco smoke during pregnancy period and to investigate the protective effects of alpha lipoic acid, which is administered during pregnancy, on these changes. Spraque-Dawley female rats were divided into four groups: control, tobacco smoke (TS), tobacco smoke + alpha lipoic acid (TS + ALA) and alpha lipoic acid (ALA). The rats in control group were untreated. Rats were exposed to TS twice a day for one hour starting from eight weeks before mating and during pregnancy. 20 mg / kg of ALA was administered to rats. On 7th and 21st days 7 of the pups from each group were decapitated. Histological, morphometric, biochemical and quantitative real-time RT-PCR analyzes were performed. Histopathological and biochemical changes were observed in TS group. While a significant decrease was observed both in SP-A and VEGF immunoreactivities and mRNA levels, caspase-3 immunoreactivity and TUNEL positive cells were increased in TS group. It is suggested that prenatal TS exposure leads to morphological and histopathological changes on lung development by causing oxidative damage in lungs of neonatal rats and the maternal use of ALA can provide a limited protective effect on the neonatal lung development against this oxidative stress originating from TS. Although pregnant women are increasingly aware on health risks of smoking, environmental tobacco smoke exposure is still a widespread problem. For this reason, it is thought that this damage can be partially reduced by some antioxidant supplements in pregnancy.
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Affiliation(s)
- Elif Erdem Guzel
- Mardin Artuklu University, Healty High School, Department of Nursing, Mardin, Turkey
| | - Nalan Kaya
- Firat University, Faculty of Medicine, Department of Histology and Embryology, Elazig, Turkey
| | - Gonca Ozan
- Firat University, Faculty of Veterinary, Department of Biochemistry, Elazig, Turkey
| | - Ahmet Tektemur
- Firat University, Faculty of Medicine, Department of Medical Biology, Elazig, Turkey
| | - Durrin Ozlem Dabak
- Firat University, Faculty of Medicine, Department of Histology and Embryology, Elazig, Turkey
| | - Ibrahim Enver Ozan
- Firat University, Faculty of Medicine, Department of Histology and Embryology, Elazig, Turkey
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Zhao Z. Reevaluation of Antioxidative Strategies for Birth Defect Prevention in Diabetic Pregnancies. JOURNAL OF BIOMOLECULAR RESEARCH & THERAPEUTICS 2016; 5:145. [PMID: 28824831 PMCID: PMC5560165 DOI: 10.4172/2167-7956.1000145] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Diabetes mellitus in early pregnancy is the most severe maternal disease that is counted for 10% of newborn infants with structural defects. With the rapid increases in the number of diabetic women in childbearing age, the birth defect rate is projected to elevate dramatically. Thus, prevention of embryonic malformations becomes an urgent task. Animal studies have revealed an involvement of oxidative stress in diabetic embryopathy and treatment with antioxidants can reduce embryonic abnormalities. However, the failure of clinical trials using free radical-scavenging antioxidants to alleviate oxidative stress-related diseases prompts researchers to reevaluate the strategy in birth defect prevention. Hyperglycemia also disturbs other intracellular homeostasis, generating aberrant conditions. Perturbed folding of newly synthesized proteins causes accumulation of unfolded and misfolded proteins in the lumen of the endoplasmic reticulum (ER). The ER under the stress activates signaling cascades, known as unfolded protein response, to suppress cell mitosis and/or trigger apoptosis. ER stress can be ameliorated by chemical chaperones, which promote protein folding. Hyperglycemia also stimulates the expression of nitric oxide (NO) synthase 2 (NOS2) to produce high levels of NO and reactive nitrogen species and augment protein nitrosylation and nitration, resulting in nitrosative stress. Inhibition of NOS2 using inhibitors has been demonstrated to reduce embryonic malformations in diabetic animals. Therefore, targeting ER and nitrosative stress conditions using specific agents to prevent birth defects in diabetic pregnancies warrant further investigations. Simultaneously targeting multiple stress conditions using combined agents is a potentially effective and feasible approach.
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Affiliation(s)
- Zhiyong Zhao
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA
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Monastra G, De Grazia S, Cilaker Micili S, Goker A, Unfer V. Immunomodulatory activities of alpha lipoic acid with a special focus on its efficacy in preventing miscarriage. Expert Opin Drug Deliv 2016; 13:1695-1708. [DOI: 10.1080/17425247.2016.1200556] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Giovanni Monastra
- Department of Experimental Medicine, University la Sapienza, Rome, Italy
| | - Sara De Grazia
- Department of Research and Development, LO.LI. Pharma, Rome, Italy
| | | | - Asli Goker
- Department of Obstetrics and Gynecology, Celal Bayar University, Manisa, Turkey
| | - Vittorio Unfer
- Department of Medical Sciences, UNIIPUS – Private Swiss University Institute, Chiasso, Switzerland
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Abstract
Diabetic embryopathy is a theoretical enigma and a clinical challenge. Both type 1 and type 2 diabetic pregnancy carry a significant risk for fetal maldevelopment, and the precise reasons for the diabetes-induced teratogenicity are not clearly identified. The experimental work in this field has revealed a partial, however complex, answer to the teratological question, and we will review some of the latest suggestions.
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Affiliation(s)
- Ulf J. Eriksson
- CONTACT Ulf J. Eriksson Department of Medical Cell Biology, Uppsala University, Biomedical Center, PO Box 571, SE-751 23 Uppsala, Sweden
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The physiology of fetal membrane weakening and rupture: Insights gained from the determination of physical properties revisited. Placenta 2016; 42:59-73. [PMID: 27238715 DOI: 10.1016/j.placenta.2016.03.015] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 03/05/2016] [Accepted: 03/31/2016] [Indexed: 01/14/2023]
Abstract
Rupture of the fetal membranes (FM) is precipitated by stretch forces acting upon biochemically mediated, pre-weakened tissue. Term FM develop a para-cervical weak zone, characterized by collagen remodeling and apoptosis, within which FM rupture is thought to initiate. Preterm FM also have a weak region but are stronger overall than term FM. Inflammation/infection and decidual bleeding/abruption are strongly associated with preterm premature FM rupture (pPROM), but the specific mechanisms causing FM weakening-rupture in pPROM are unknown. There are no animal models for study of FM weakening and rupture. Over a decade ago we developed equipment and methodology to test human FM strength and incorporated it into a FM explant system to create an in-vitro human FM weakening model system. Within this model TNF (modeling inflammation) and Thrombin (modeling bleeding) both weaken human FM with concomitant up regulation of MMP9 and cellular apoptosis, mimicking the characteristics of the spontaneous FM rupture site. The model has been enhanced so that test agents can be applied directionally to the choriodecidual side of the FM explant consistent with the in-vivo situation. With this enhanced system we have demonstrated that the pathways involving inflammation/TNF and bleeding/Thrombin induced FM weakening overlap. Furthermore GM-CSF production was demonstrated to be a critical common intermediate step in both the TNF and the Thrombin induced FM weakening pathways. This model system has also been used to test potential inhibitors of FM weakening and therefore pPROM. The dietary supplement α-lipoic acid and progestogens (P4, MPA and 17α-hydroxyprogesterone) have been shown to inhibit both TNF and Thrombin induced FM weakening. The progestogens act at multiple points by inhibiting both GM-CSF production and GM-CSF action. The use of a combined biomechanical/biochemical in-vitro human FM weakening model system has allowed the pathways of fetal membrane weakening to be delineated, and agents that may be of clinical use in inhibiting these pathways to be tested.
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Abbassy MA, Watari I, Bakry AS, Ono T, Hassan AH. Calcitonin and vitamin D3 have high therapeutic potential for improving diabetic mandibular growth. Int J Oral Sci 2016; 8:39-44. [PMID: 27025264 PMCID: PMC4822182 DOI: 10.1038/ijos.2015.47] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2015] [Indexed: 11/25/2022] Open
Abstract
The goal of this study was to assess the effect of the intermittent combination of an antiresorptive agent (calcitonin) and an anabolic agent (vitamin D3) on treating the detrimental effects of Type 1 diabetes mellitus (DM) on mandibular bone formation and growth. Forty 3-week-old male Wistar rats were divided into four groups: the control group (normal rats), the control C+D group (normal rats injected with calcitonin and vitamin D3), the diabetic C+D group (diabetic rats injected with calcitonin and vitamin D3) and the diabetic group (uncontrolled diabetic rats). An experimental DM condition was induced in the male Wistar rats in the diabetic and diabetic C+D groups using a single dose of 60 mg·kg−1 body weight of streptozotocin. Calcitonin and vitamin D3 were simultaneously injected in the rats of the control C+D and diabetic C+D groups. All rats were killed after 4 weeks, and the right mandibles were evaluated by micro-computed tomography and histomorphometric analysis. Diabetic rats showed a significant deterioration in bone quality and bone formation (diabetic group). By contrast, with the injection of calcitonin and vitamin D3, both bone parameters and bone formation significantly improved (diabetic C+D group) (P < 0.05). These findings suggest that these two hormones might potentially improve various bone properties.
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Affiliation(s)
- Mona A Abbassy
- Orthodontic Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Orofacial Development and Function, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.,Alexandria University, Alexandria, Egypt
| | - Ippei Watari
- Department of Orofacial Development and Function, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ahmed S Bakry
- Conservative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.,Cariology and Operative Dentistry Department, Graduate School of Medical and Dental Sciences, Tokyo Medical & Dental University, Tokyo, Japan.,Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
| | - Takashi Ono
- Department of Orofacial Development and Function, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ali H Hassan
- Orthodontic Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
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Topcuoglu S, Karatekin G, Yavuz T, Arman D, Kaya A, Gursoy T, Ovalı F. The relationship between the oxidative stress and the cardiac hypertrophy in infants of diabetic mothers. Diabetes Res Clin Pract 2015; 109:104-9. [PMID: 25934526 DOI: 10.1016/j.diabres.2015.04.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 03/23/2015] [Accepted: 04/15/2015] [Indexed: 11/23/2022]
Abstract
Recently, oxidative stress was suggested to play a role in maternal and fetal complications of diabetic pregnancies. The aim of this study is to evaluate the global oxidant and antioxidant status in infants of diabetic mothers (IDM) via measurement of total antioxidant capacity (TAC) and total oxidant status (TOS) and to determine their association with the clinical and cardiac manifestations of gestational diabetes on infants. Forty five infants constituted the IDM group, 51 infants born to non diabetic mothers served as the control group. Umbilical cord blood was drawn from IDM and controls for TAC and TOS measurement. Echocardiographic measurements were performed in the first three days of life. Infants of diabetic mother had significantly higher TAC (p=0.024), TOS (p=0.03) and oxidative stress index (OSI, p=0.04) levels compared to controls. Hemoglobin values were correlated to TOS (r=0.310, p=0.03) and OSI (r=0.310, p=0.03). Maternal HbA1c values were also correlated to TOS (r=0.576, p=0.001) and OSI (r=0.606, p<0.001). Systolic and diastolic interventicular septum measurements, and left ventricular mass were also correlated with TOS (r=0.330, p=0.02; r=0.453, p=0.002; r=0.404, p=0.006, respectively) and OSI (r=0.330, p=0.02; r=0.300, p=0.04, r=0.300; p=0.04, respectively). Oxidant-antioxidant balance is disturbed in favor of oxidants in IDM despite compensatory increase in TAC. The degree of oxidative stress is related to the severity of myocardial and hematological involvement in IDM in the first days of life and maternal glycemic control.
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Affiliation(s)
- Sevilay Topcuoglu
- Neonatal Intensive Care Unit, Zeynep Kamil Maternity and Children's Training and Research Hospital, Istanbul, Turkey.
| | - Guner Karatekin
- Neonatal Intensive Care Unit, Zeynep Kamil Maternity and Children's Training and Research Hospital, Istanbul, Turkey
| | - Taner Yavuz
- Pediatric Cardiology, Zeynep Kamil Maternity and Children's Training and Research Hospital, Istanbul, Turkey
| | - Didem Arman
- Neonatal Intensive Care Unit, Zeynep Kamil Maternity and Children's Training and Research Hospital, Istanbul, Turkey
| | - Ayşem Kaya
- Section of Biochemistry, Institute of Cardiology, Istanbul University, Istanbul, Turkey
| | - Tugba Gursoy
- Koc University, School of Medicine, Istanbul, Turkey
| | - Fahri Ovalı
- Neonatal Intensive Care Unit, Zeynep Kamil Maternity and Children's Training and Research Hospital, Istanbul, Turkey
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Wang F, Reece EA, Yang P. Oxidative stress is responsible for maternal diabetes-impaired transforming growth factor beta signaling in the developing mouse heart. Am J Obstet Gynecol 2015; 212:650.e1-11. [PMID: 25595579 DOI: 10.1016/j.ajog.2015.01.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 12/20/2014] [Accepted: 01/08/2015] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Oxidative stress plays a causal role in diabetic embryopathy. Maternal diabetes induces heart defects and impaired transforming growth factor beta (TGFβ) signaling, which is essential for cardiogenesis. We hypothesize that mitigating oxidative stress through superoxide dismutase 1 (SOD1) overexpression in transgenic (Tg) mice reverses maternal hyperglycemia-impaired TGFβ signaling and its downstream effectors. STUDY DESIGN Day 12.5 embryonic hearts from wild-type (WT) and SOD1 overexpressing embryos of nondiabetic (ND) and diabetic mellitus (DM) dams were used for the detection of oxidative stress markers: 4-hydroxynonenal (4-HNE) and malondlaldehyde (MDA), and TGFβ1, 2, and 3, phosphor (p)-TGFβ receptor II (TβRII), p-phosphorylated mothers against decapentaplegic (Smad)2, and p-Smad3. The expression of 3 TGFβ-responsive genes was also assessed. Day 11.5 embryonic hearts were explanted and cultured ex vivo, with or without treatments of a SOD1 mimetic (Tempol; Enzo Life Science, Farmingdale, NY) or a TGFβ recombinant protein for the detection of TGFβ signaling intermediates. RESULTS Levels of 4-HNE and MDA were significantly increased by maternal diabetes, and SOD1 overexpression blocked the increase of these 2 oxidative stress markers. Maternal diabetes suppresses the TGFβ signaling pathway by down-regulating TGFβ1 and TGFβ3 expression. Consequently, phosphorylation of TβRII, Smad2, and Smad3, downstream effectors of TGFβ, and expression of 3 TGFβ-responsive genes were reduced by maternal diabetes, and these reductions were prevented by SOD1 overexpression. Treatment with Tempol or TGFβ recombinant protein restored high-glucose-suppressed TGFβ signaling intermediates and responsive gene expression. CONCLUSION Oxidative stress mediates the inhibitory effect of hyperglycemia in the developing heart. Antioxidants, TGFβ recombinant proteins, or TGFβ agonists may have potential therapeutic values in the prevention of heart defects in diabetic pregnancies.
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Affiliation(s)
- Fang Wang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD
| | - E Albert Reece
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD
| | - Peixin Yang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD.
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28
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Bentov Y, Hannam T, Jurisicova A, Esfandiari N, Casper RF. Coenzyme Q10 Supplementation and Oocyte Aneuploidy in Women Undergoing IVF-ICSI Treatment. CLINICAL MEDICINE INSIGHTS. REPRODUCTIVE HEALTH 2014; 8:31-6. [PMID: 24987272 PMCID: PMC4071761 DOI: 10.4137/cmrh.s14681] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 03/02/2014] [Accepted: 03/10/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND The age-related reduction in live-birth rate is attributed to a high rate of aneuploidy and follicle depletion. We showed in an animal model that treatment with Coenzyme Q10 (CoQ10) markedly improved reproductive outcome. The aim of this study was to compare the post-meiotic oocyte aneuploidy rate in in vitro fertilization (IVF) and intra cytoplasmic sperm injection (ICSI) patients treated with CoQ10 or placebo. METHODS We conducted a double blind placebo controlled randomized trial that included IVF–ICSI patients 35–43 years of age. The patients were treated with either 600 mg of CoQ10 or an equivalent number of placebo caps. We compared the post-meiotic aneuploidy rate using polar body biopsy (PBBX) and comparative genomic hybridization (CGH). According to the power calculation, 27 patients were needed for each arm. RESULTS Owing to safety concerns regarding the effects of polar body biopsy on embryo quality and implantation, the study was terminated before reaching the target number of participants. A total of 39 patients were evaluated and randomized (17 CoQ10, 22 placebo), 27 were given the study medication (12 CoQ10, 15 placebo), and 24 completed an IVF–ICSI cycle including PBBX and embryo transfer (10 CoQ10, 14 placebo). Average age, base line follicle stimulating hormone (FSH), peak estradiol and progesterone serum level, as well as the total number of human menopausal gonadotropin (hMG) units—did not differ between the groups. The rate of aneuploidy was 46.5% in the CoQ10 group compared to 62.8% in the control. Clinical pregnancy rate was 33% for the CoQ10 group and 26.7% for the control group. CONCLUSION No significant differences in outcome were detected between the CoQ10 and placebo groups. However, the final study was underpowered to detect a difference in the rate of aneuploidy.
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Affiliation(s)
- Yaakov Bentov
- Toronto Centre for Advanced Reproductive Technology, Toronto, Ontario, Canada. ; Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Ontario, Canada. ; Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | | | - Andrea Jurisicova
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Ontario, Canada. ; Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Navid Esfandiari
- Toronto Centre for Advanced Reproductive Technology, Toronto, Ontario, Canada. ; Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Ontario, Canada
| | - Robert F Casper
- Toronto Centre for Advanced Reproductive Technology, Toronto, Ontario, Canada. ; Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Ontario, Canada. ; Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
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Iwata J, Suzuki A, Pelikan RC, Ho TV, Sanchez-Lara PA, Chai Y. Modulation of lipid metabolic defects rescues cleft palate in Tgfbr2 mutant mice. Hum Mol Genet 2013; 23:182-93. [PMID: 23975680 DOI: 10.1093/hmg/ddt410] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Mutations in transforming growth factor beta (TGFβ) receptor type II (TGFBR2) cause Loeys-Dietz syndrome, characterized by craniofacial and cardiovascular abnormalities. Mice with a deletion of Tgfbr2 in cranial neural crest cells (Tgfbr2(fl/fl);Wnt1-Cre mice) develop cleft palate as the result of abnormal TGFβ signaling activation. However, little is known about metabolic processes downstream of TGFβ signaling during palatogenesis. Here, we show that Tgfbr2 mutant palatal mesenchymal cells spontaneously accumulate lipid droplets, resulting from reduced lipolysis activity. Tgfbr2 mutant palatal mesenchymal cells failed to respond to the cell proliferation stimulator sonic hedgehog, derived from the palatal epithelium. Treatment with p38 mitogen-activated protein kinase (MAPK) inhibitor or telmisartan, a modulator of p38 MAPK activation and lipid metabolism, blocked abnormal TGFβ-mediated p38 MAPK activation, restoring lipid metabolism and cell proliferation activity both in vitro and in vivo. Our results highlight the influence of alternative TGFβ signaling on lipid metabolic activities, as well as how lipid metabolic defects can affect cell proliferation and adversely impact palatogenesis. This discovery has broader implications for the understanding of metabolic defects and potential prevention of congenital birth defects.
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Affiliation(s)
- Junichi Iwata
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry and
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30
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Bruin JE, Woynillowicz AK, Hettinga BP, Tarnopolsky MA, Morrison KM, Gerstein HC, Holloway AC. Maternal antioxidants prevent β-cell apoptosis and promote formation of dual hormone-expressing endocrine cells in male offspring following fetal and neonatal nicotine exposure. J Diabetes 2012; 4:297-306. [PMID: 22385833 PMCID: PMC3620564 DOI: 10.1111/j.1753-0407.2012.00195.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Fetal and neonatal nicotine exposure causes β-cell oxidative stress and apoptosis in neonates, leading to adult-onset dysglycemia. The aim of the present study was to determine whether an antioxidant intervention could prevent nicotine-induced β-cell loss. METHODS Nulliparous female Wistar rats received daily subcutaneous injections of either saline or nicotine bitartrate (1.0 mg/kg per day) for 2 weeks prior to mating until weaning. Nicotine-exposed dams received either normal chow or diet containing antioxidants (1000 IU/kg vitamin E, 0.25% w/w coenzyme Q10, and 0.1% w/w α-lipoic acid) during mating, pregnancy, and lactation; saline-exposed dams received normal chow. Pancreatic tissue was collected from male offspring at 3 weeks of age to measure β-cell fraction, apoptosis, proliferation, and the presence of cells coexpressing insulin and glucagon. RESULTS The birth weight of offspring born to nicotine-exposed dams was significantly reduced in those receiving dietary antioxidants compared with those fed normal chow. Most interestingly, the antioxidant intervention to nicotine-exposed dams prevented the β-cell loss and apoptosis observed in nicotine-exposed male offspring whose mothers did not receive antioxidants. Male pups born to nicotine-treated mothers receiving antioxidants also had a tendency for increased β-cell proliferation and a significant increase in islets containing insulin/glucagon bihormonal cells compared with the other two treatment groups. CONCLUSION The present study demonstrates that exposure to maternal antioxidants protects developing β-cells from the damaging effects of nicotine, thus preserving β-cell mass.
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Affiliation(s)
- Jennifer E Bruin
- Department of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada
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Spadotto R, Damasceno DC, Godinho AF, Amorim EMP, Perobelli JE, Kempinas WDG. Reproductive physiology, and physical and sexual development of female offspring born to diabetic dams. ACTA ACUST UNITED AC 2012; 56:96-103. [PMID: 22584562 DOI: 10.1590/s0004-27302012000200002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Accepted: 02/17/2012] [Indexed: 11/22/2022]
Abstract
OBJECTIVES The objective of this study was to evaluate physical and sexual development and reproductive physiology in female rat offspring that developed in hyperglycemia conditions in utero and during lactation. MATERIALS AND METHODS Maternal diabetes was induced in female rats by a single IV injection of streptozotocin before mating. Female offspring development was evaluated by means of the following parameters: physical development; age of vaginal opening and first estrus; weight and histological evaluation of uterus and ovaries; duration of the estrous cycle, sexual behavior, and fertility after natural mating. RESULTS In the female offspring, maternal diabetes caused delays in initial physical development; diminution in ovary weight and number of follicles; and inferior reproductive performance compared with the control group. CONCLUSIONS The exposure to hyperglycemia in uterus and during lactation caused delays in physical and sexual development, and affected the reproductive physiology of female rats negatively.
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Affiliation(s)
- Raquel Spadotto
- Graduate Program in Geral and Applied Biology, Institute of Biosciences, Universidade Estadual Paulista, Sao Paulo, Brazil
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Lappas M, Hiden U, Desoye G, Froehlich J, Hauguel-de Mouzon S, Jawerbaum A. The role of oxidative stress in the pathophysiology of gestational diabetes mellitus. Antioxid Redox Signal 2011; 15:3061-100. [PMID: 21675877 DOI: 10.1089/ars.2010.3765] [Citation(s) in RCA: 250] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Normal human pregnancy is considered a state of enhanced oxidative stress. In pregnancy, it plays important roles in embryo development, implantation, placental development and function, fetal development, and labor. However, pathologic pregnancies, including gestational diabetes mellitus (GDM), are associated with a heightened level of oxidative stress, owing to both overproduction of free radicals and/or a defect in the antioxidant defenses. This has important implications on the mother, placental function, and fetal well-being. Animal models of diabetes have confirmed the important role of oxidative stress in the etiology of congenital malformations; the relative immaturity of the antioxidant system facilitates the exposure of embryos and fetuses to the damaging effects of oxidative stress. Of note, there are only a few clinical studies evaluating the potential beneficial effects of antioxidants in GDM. Thus, whether or not increased antioxidant intake can reduce the complications of GDM in both mother and fetus needs to be explored. This review provides an overview and updated data on our current understanding of the complications associated with oxidative changes in GDM.
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Affiliation(s)
- Martha Lappas
- Department of Obstetrics and Gynaecology, University of Melbourne, Mercy Hospital for Women, Heidelberg, Victoria, Australia.
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Amorim EMP, Damasceno DC, Perobelli JE, Spadotto R, Fernandez CDB, Volpato GT, Kempinas WDG. Short- and long-term reproductive effects of prenatal and lactational growth restriction caused by maternal diabetes in male rats. Reprod Biol Endocrinol 2011; 9:154. [PMID: 22142502 PMCID: PMC3248370 DOI: 10.1186/1477-7827-9-154] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Accepted: 12/06/2011] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND A suboptimal intrauterine environment may have a detrimental effect on gonadal development and thereby increases the risk for reproductive disorders and infertility in adult life. Here, we used uncontrolled maternal diabetes as a model to provoke pre- and perinatal growth restriction and evaluate the sexual development of rat male offspring. METHODS Maternal diabetes was induced in the dams through administration of a single i.v. dose of 40 mg/kg streptozotocin, 7 days before mating. Female rats presenting glycemic levels above 200 mg/dL after the induction were selected for the experiment. The male offspring was analyzed at different phases of sexual development, i.e., peripuberty, postpuberty and adulthood. RESULTS Body weight and blood glucose levels of pups, on the third postnatal day, were lower in the offspring of diabetic dams compared to controls. Maternal diabetes also provoked delayed testicular descent and preputial separation. In the offspring of diabetic dams the weight of reproductive organs at 40, 60 and 90 days-old was lower, as well as sperm reserves and sperm transit time through the epididymis. However the plasma testosterone levels were not different among experimental groups. CONCLUSIONS It is difficult to isolate the effects directly from diabetes and those from IUGR. Although the exposure to hyperglycemic environment during prenatal life and lactation delayed the onset of puberty in male rats, the IUGR, in the studied model, did not influenced the structural organization of the male gonads of the offspring at any point during sexual development. However the decrease in sperm reserves in epididymal cauda and the acceleration in sperm transit time in this portion of epididymis may lead to an impairment of sperm quality and fertility potential in these animals. Additional studies are needed in attempt to investigate the fertility of animals with intrauterine growth restriction by maternal diabetes and possible multigenerational effects.
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Affiliation(s)
- Elaine MP Amorim
- Center of Biological and Health Sciences (CCBS), State University of West Paraná (UNIOESTE), Cascavel, Paraná, Brazil
| | - Débora C Damasceno
- Department of Gynecology and Obstetrics, Botucatu Medical School, UNESP - Univ Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Juliana E Perobelli
- Graduate Program in Cell and Structural Biology, Institute of Biology, University of Campinas, Campinas, São Paulo, Brazil
| | - Raquel Spadotto
- Department of Morphology, Institute of Biosciences, UNESP - Univ Estadual Paulista, 18618-970, Botucatu, São Paulo, Brazil
| | - Carla DB Fernandez
- Department of Morphology, Institute of Biosciences, UNESP - Univ Estadual Paulista, 18618-970, Botucatu, São Paulo, Brazil
| | - Gustavo T Volpato
- Department of Morphology, Institute of Biosciences, UNESP - Univ Estadual Paulista, 18618-970, Botucatu, São Paulo, Brazil
| | - Wilma DG Kempinas
- Department of Morphology, Institute of Biosciences, UNESP - Univ Estadual Paulista, 18618-970, Botucatu, São Paulo, Brazil
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Cetin I, Berti C, Calabrese S. Role of micronutrients in the periconceptional period. Hum Reprod Update 2009; 16:80-95. [DOI: 10.1093/humupd/dmp025] [Citation(s) in RCA: 204] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Sugimura Y, Murase T, Kobayashi K, Oyama K, Hayasaka S, Kanou Y, Oiso Y, Murata Y. Alpha-lipoic acid reduces congenital malformations in the offspring of diabetic mice. Diabetes Metab Res Rev 2009; 25:287-94. [PMID: 19242917 DOI: 10.1002/dmrr.947] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND The mechanism of diabetes-induced congenital malformation remains to be elucidated. It has been reported that alpha-lipoic acid (LA) prevents neural tube defects (NTDs) in offsprings of rats with streptozotocin-induced diabetes. Here, we evaluate the protective effect of LA against diabetic embryopathy, including NTDs, cardiovascular malformations (CVMs), and skeletal malformations, in mice. METHODS Female mice were rendered hyperglycemic using streptozotocin and then mated with normal male mouse. Pregnant diabetic or non-diabetic mice were treated daily with either LA (100 mg/kg body weight) or saline between gestational days 0 and 18. On day 18, fetuses were examined for congenital malformations. RESULTS Plasma glucose levels on day 18 were not affected by LA treatment. No congenital malformations were observed either in the saline-treated or LA-treated non-diabetic group. In the saline-treated diabetic group, 39% of fetuses had external malformations and 30% had NTDs. In the LA-treated diabetic group, the corresponding proportions were 11 and 8%, respectively. LA treatment also decreased the incidence of CVMs from 30-3% and of skeletal malformations from 29-6%. CONCLUSIONS We conclude that LA can reduce NTDs, CVMs and skeletal malformations in the offspring of diabetic mice at term delivery.
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Affiliation(s)
- Y Sugimura
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
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Alcolea MP, Lladó I, García-Palmer FJ, Gianotti M. Responses of mitochondrial biogenesis and function to maternal diabetes in rat embryo during the placentation period. Am J Physiol Endocrinol Metab 2007; 293:E636-44. [PMID: 17609253 DOI: 10.1152/ajpendo.00120.2007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mitochondria are cellular organelles that have been reported to be altered in diabetes, being closely related to its associated complications. Moreover, mitochondrial biogenesis and function are essential for proper embryo development throughout the placentation period, occurring during organogenesis, when a great rate of congenital malformations have been associated with diabetic pregnancy. Thus, the aim of the current work was to investigate the effect of the diabetic environment on mitochondrial function and biogenesis during the placentation period. For this purpose, we studied the oxidative phosphorylation system (OXPHOS) enzymatic activities as well as the expression of genes involved in the coordinated regulation of both mitochondrial and nuclear genome (PGC-1alpha, NRF-1, NRF-2alpha, mtSSB, and TFAM) and mitochondrial function (COX-IV, COX-I, and beta-ATPase) in rat embryos from control and streptozotocin-induced diabetic mothers. Our results reflected that diabetic pregnancy retarded and altered embryo growth. The embryos from diabetic mothers showing normal morphology presented a reduced content of proteins regulated through the PGC-1alpha mitochondriogenic pathway on gestational day 12. This fact was accompanied by several responses that entailed the activation of OXPHOS activities on the same day and the recovery of the content of the studied proteins to control levels on day 13. As a result, the mitochondria of these embryos would reach a situation close to control on day 13 that could allow them to follow the normal mitochondriogenic schedule throughout a gestational period in which the mitochondrial differentiation process is critical. Nevertheless, malformed embryos from diabetic mothers seemed to show a lower adaptation capability, which could exacerbate their maldevelopment.
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Affiliation(s)
- M P Alcolea
- Grup de Metabolisme Energètic i Nutrició, Universitat de les Illes Balears i Centro de Investigación Biomédica en Red (Network Biomedical Research Center) Fisiopatología Obesidad y Nutrición, Instituto de Salud Carlos III, Palma de Mallorca, Spain
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Padmanabhan R, Mohamed S, Singh S. Beneficial Effect of Supplemental Lipoic Acid on Diabetes-Induced Pregnancy Loss in the Mouse. Ann N Y Acad Sci 2006; 1084:118-31. [PMID: 17151296 DOI: 10.1196/annals.1372.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Uncontrolled diabetes mellitus (DM) is an etiological factor for recurrent pregnancy loss, fetal growth disorders, and major congenital malformations in the offspring. Antioxidant therapy has been advocated to overcome the oxidant-antioxidant disequilibrium inherent in diabetes. The objective of this article was to evaluate the beneficial effects of alpha-lipoic acid (LA) on fetal outcome in a mouse model of streptozotocin (STZ)-induced DM. Timed pregnant mice were made diabetic by intraperitoneal (IP) injection of a single dose of STZ (200 mg/kg) on gestation day (GD) 2. Diabetic animals were supplemented daily with an IP injection of 15 mg/kg of LA starting on GD 4 and continued through GD 12. Fetuses were examined on GD 18 for malformations and growth restriction. Some diabetic mice injected with Evans blue were examined on GD 3.5 and GD 6.5 to evaluate frequency of implantations. STZ-treated mice had all cardinal signs of DM. LA treatment did not normalize blood glucose levels of DM mice. Rates of pregnancy in saline control, DM, and DM + LA groups were 90%, 28%, and 64%, respectively, indicating that LA promotes pregnancy in DM animals. However, postimplantation resorption showed a threefold increase in the DM + LA group. Rates of intrauterine growth restriction and major congenital malformations were also augmented thus indicating that the interaction between DM and LA has deleterious effects on postimplantation embryos.
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Affiliation(s)
- Rengasamy Padmanabhan
- Department of Anatomy, Faculty of Medicine and Health Sciences, UAE University, PO Box 17666, Al Ain, United Arab Emirates.
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Abstract
alpha-Lipoic acid (LA) is a cofactor for mitochondrial alpha-ketoacid dehydrogenase complexes and is one of the most potent, natural antioxidants. Reduction of oxidative stress by LA supplementation has been demonstrated in patients with diabetic neuropathy and in animal models. To determine how normal development or pathological conditions are affected by genetic alterations in the ability of mammalian cells to synthesize LA and whether dietary LA can circumvent its endogenous absence, we have generated mice deficient in lipoic acid synthase (Lias). Mice heterozygous for disruption of the Lias gene develop normally, and their plasma levels of thiobarbituric acid-reactive substances do not differ from those of wild-type mice. However, the heterozygotes have significantly reduced erythrocyte glutathione levels, indicating that their endogenous antioxidant capacity is lower than those of wild-type mice. Homozygous embryos lacking Lias appear healthy at the blastocyst stage, but their development is retarded globally by 7.5 days postcoitum (dpc), and all the null embryos die before 9.5 dpc. Supplementing the diet of heterozygous mothers with LA (1.65 g/kg of body weight) during pregnancy fails to prevent the prenatal deaths of homozygous embryos. Thus, endogenous LA synthesis is essential for developmental survival and cannot be replaced by LA in maternal tissues and blood.
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Affiliation(s)
- Xianwen Yi
- Department of Pathology and Laboratory Medicine, The University of North Carolina at Chapel Hill, 701 Brinkhous-Bullitt Building, Chapel Hill, NC 27599-7525, USA
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