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Yurci A, Dokuzeylül Güngör N, Güngör K, Hatırnaz Ş. Correlation of serum leptin and ghrelin levels with endocrine and reproductive parameters in women with clomiphene citrate resistant polycystic ovary syndrome. Turk J Obstet Gynecol 2022; 19:124-129. [PMID: 35770481 PMCID: PMC9249363 DOI: 10.4274/tjod.galenos.2022.84883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Ievleva KD, Danusevich IN, Suturina LV. [Role of leptin and nuclear receptor PPARγ in PCOS pathogenesis]. ACTA ACUST UNITED AC 2020; 66:74-80. [PMID: 33481370 DOI: 10.14341/probl12620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/18/2020] [Accepted: 12/06/2020] [Indexed: 11/06/2022]
Abstract
Polycystic ovary syndrome (PCOS) is the most common cause of female endocrine infertility. Insulin resistanсе is supposed to be one of the essential factors of this disease pathways. At the same time, the mechanisms of PCOS development in insulin-resistant patients have not been completely established. Leptin and Peroxisome Proliferator-Activated Receptor γ(PPARγ) are involved in carbohydrate metabolism and reproduction function regulation. It indicates that leptin and PPARγ possibly play a role in the pathways of PCOS. This article is a review of publications on this issue. The purpose of this review was to systematize the available information on the molecular mechanisms that determine the role of leptin and PPARγ in the development of PCOS. The literature search was carried out from 04/05/2020 to 05/17/2020 using the scientific literature databases: NCBI PubMed (foreign sources) and Cyberleninka (domestic sources). We analyzed publications for the period 1990-2020.The review presents the current understanding of the possible role of leptin and PPARγ in the regulation of endocrine, immune systems, and reproductive function, as well as in the development of PCOS. Currently, no studies cover the mechanisms of interaction between leptin and PPARγ in the pathways of this syndrome. The available studies indicating the individual contribution and association of leptin and PPARγ with PCOS are conflicting and have many limitations. Therefore, more studies of direct and indirect interaction of leptin and PPARγ, as well as their role in PCOS pathways, are needed.
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Affiliation(s)
- K D Ievleva
- Scientific Сentre for Family Health and Human Reproduction Problems
| | - I N Danusevich
- Scientific Сentre for Family Health and Human Reproduction Problems
| | - L V Suturina
- Scientific Сentre for Family Health and Human Reproduction Problems
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Malik IA, Durairajanayagam D, Singh HJ. Leptin and its actions on reproduction in males. Asian J Androl 2020; 21:296-299. [PMID: 30539926 PMCID: PMC6498734 DOI: 10.4103/aja.aja_98_18] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Leptin, an adipocyte-derived hormone, serves numerous physiological functions in the body, particularly during puberty and reproduction. The exact mechanism by which leptin activates the gonadotropin-releasing hormone (GnRH) neurons to trigger puberty and reproduction remains unclear. Given the widespread distribution of leptin receptors in the body, both central and peripheral mechanisms involving the hypothalamic-pituitary-gonadal axis have been hypothesized. Leptin is necessary for normal reproductive function, but when present in excess, it can have detrimental effects on the male reproductive system. Human and animal studies point to leptin as a link between infertility and obesity, a suggestion that is corroborated by findings of low sperm count, increased sperm abnormalities, oxidative stress, and increased leptin levels in obese men. In addition, daily leptin administration to normal-weight rats has been shown to result in similar abnormalities in sperm parameters. The major pathways causing these abnormalities remain unidentified; however, these adverse effects have been attributed to leptin-induced increased oxidative stress because they are prevented by concurrently administering melatonin. Studies on leptin and its impact on sperm function are highly relevant in understanding and managing male infertility, particularly in overweight and obese men.
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Affiliation(s)
- Ifrah Alam Malik
- Department of Physiology, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Sg Buloh 47000, Selangor, Malaysia
| | - Damayanthi Durairajanayagam
- Department of Physiology, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Sg Buloh 47000, Selangor, Malaysia
| | - Harbindar Jeet Singh
- Department of Physiology, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Sg Buloh 47000, Selangor, Malaysia.,2I-PPerForM, Universiti Teknologi MARA, Sungai Buloh Campus, Sg Buloh 47000, Selangor, Malaysia
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Almabhouh FA, Md Mokhtar AH, Malik IA, Aziz NAAA, Durairajanayagam D, Singh HJ. Leptin and reproductive dysfunction in obese men. Andrologia 2019; 52:e13433. [DOI: 10.1111/and.13433] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 08/05/2019] [Accepted: 08/12/2019] [Indexed: 12/15/2022] Open
Affiliation(s)
| | | | - Ifrah Alam Malik
- Faculty of Medicine Universiti Teknologi MARA Sungai Buloh Malaysia
| | | | | | - Harbindar Jeet Singh
- Faculty of Medicine Universiti Teknologi MARA Sungai Buloh Malaysia
- I‐PerFForm Faculty of Medicine Universiti Teknologi MARA Sungai Buloh Malaysia
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Menezes VG, Monte APO, Gouveia BB, Lins TLBG, Donfack NJ, Macedo TJS, Barberino RS, Santos JM, Matos MHT, Batista AM, Wischral A. Effects of leptin on the follicular development and mitochondrial activity of ovine isolated early antral follicles cultured in vitro. Theriogenology 2019; 138:77-83. [PMID: 31302434 DOI: 10.1016/j.theriogenology.2019.07.005] [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: 01/12/2019] [Revised: 07/03/2019] [Accepted: 07/04/2019] [Indexed: 12/21/2022]
Abstract
This study evaluated the effect of leptin on the in vitro culture of isolated sheep early antral follicles. Early antral follicles (300-450 μm) were isolated and cultured for 12 days in tissue culture medium 199 (TCM 199) supplemented with glutamine, hypoxanthine, transferrin, insulin, selenium, ascorbic acid, bovine serum albumin (BSA) and recombinant follicle stimulating hormone (rFSH) (TCM 199+: control medium) or TCM 199+ supplemented with 2 or 10 ng/mL leptin. After culture, oocytes were subjected to in vitro maturation (IVM). The parameters analyzed were morphology, extrusion rate, follicular diameter, growth and fully-grown oocytes (oocytes ≥110 μm) rates. After IVM, reactive oxygen species (ROS) levels, mitochondrial activity, meiotic stages and meiotic resumption rates were also analyzed. After 12 days of culture, the concentration of 2 ng/mL of leptin showed a higher percentage of morphologically normal follicles, fully-grown oocytes (≥110 μm), active mitochondria and meiotic resumption compared to the control medium (TCM 199+; P < 0.05) but did not differ when compared to leptin concentration of 10 ng/mL (P > 0.05). After culturing, no significant differences existed among treatments in terms of the follicle diameter and ROS levels. In conclusion, the addition of 2 ng/mL leptin to the base culture medium is capable of improving follicular survival, oocyte growth, mitochondrial activity and meiotic resumption after the in vitro culture of isolated sheep early antral follicles.
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Affiliation(s)
- V G Menezes
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil.
| | - A P O Monte
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - B B Gouveia
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - T L B G Lins
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - N J Donfack
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - T J S Macedo
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - R S Barberino
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - J M Santos
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - M H T Matos
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Federal University of São Francisco Valley, Petrolina, PE, Brazil
| | - A M Batista
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Recife, PE, Brazil
| | - A Wischral
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Recife, PE, Brazil
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The Cannabinoid Receptor 2 Q63R Variant Modulates the Relationship between Childhood Obesity and Age at Menarche. PLoS One 2015; 10:e0140142. [PMID: 26447698 PMCID: PMC4598176 DOI: 10.1371/journal.pone.0140142] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 09/21/2015] [Indexed: 01/08/2023] Open
Abstract
Background The ovary is an important site where gene variants modulate pubertal timing. The cannabinoid receptor 2 (CB2) is expressed in the ovary, plays a role in folliculogenesis and ovulation, and can be modulated by estrogens. Obesity is strictly associated with early menarche and is characterized by sex hormone and endocannabinoid derangement. Aim In this study, we investigated the role of the CB2 receptor in determining the age at menarche in obese girls. Methods We studied a cohort of 240 obese girls (age 11.9±3 years; BMI z-score 2.8±0.8). The age at menarche (if it had already occurred) was recorded at the time of the visit or via phonecall. The CNR2 rs35761398 polymorphism, which leads to the CB2 Q63R variant, was detected by the TaqMan assay. Results In total, 105 patients were homozygous for the R63-coding allele (RR), 113 were QR and 22 were QQ. Variance analysis revealed a significantly earlier age of menarche in subjects carrying the Q63 allele, which was also found after adjusting for BMI z-score (11±1.2 vs. 11.6±1.2 years, p = 0.0003). Logistic regression analysis demonstrated that patients homozygous for the Q allele had a 2.2-fold higher risk (odds ratio = 2.2; CI1.1–3.4; p = 0.02) of presenting with an early menarche (age at menarche <12 years). Conclusion We demonstrated for the first time the association between the CB2 Q63R functional variant and the age at menarche in a cohort of Italian obese girls.
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Association between follicular fluid leptin and serum insulin levels in nonoverweight women with polycystic ovary syndrome. BIOMED RESEARCH INTERNATIONAL 2014; 2014:980429. [PMID: 24895638 PMCID: PMC4026966 DOI: 10.1155/2014/980429] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 04/12/2014] [Accepted: 04/14/2014] [Indexed: 11/25/2022]
Abstract
Aims. We evaluated the links between leptin and visfatin levels and fertilization rates in nonoverweight (NOW) women with PCOS (NOW-PCOS) from Apulia undergoing in vitro fertilization/embryo transfer (IVF). Materials and Methodology. We recruited 16 NOW women with PCOS (NOW-PCOS) and 10 normally ovulating NOW women (control-NOW). All women underwent IVF. Androgens, 17-β-estradiol (17β-E2), and insulin levels were measured in plasma and/or serum and leptin and visfatin levels were assayed in both serum and follicular fluid (FF-leptin, FF-visfatin). Results. In NOW-PCOS, both serum and FF-leptin were significantly lower than in control-NOW. In NOW-PCOS, significant correlations were found between BMI and serum leptin and insulinemia and FF-leptin. By contrast, in control-NOW, FF-leptin levels were not correlated with insulinemia. Serum visfatin levels were not significantly different in NOW-PCOS and control-NOW, but FF-visfatin levels were 1.6-fold higher, although not significantly, in NOW-PCOS than in control-NOW. Conclusions. Both serum leptin levels and FF-leptin are BMI- and insulin-related in Southern Italian NOW-PCOS from Apulia. In line with other reports showing that FF-leptin levels are predictive of fertilization rates, lower than normal FF-leptin levels in NOW-PCOS may explain their lower fertilization rate and this may be related to the level of insulin and/or insulin resistance.
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Attig L, Brisard D, Larcher T, Mickiewicz M, Guilloteau P, Boukthir S, Niamba CN, Gertler A, Djiane J, Monniaux D, Abdennebi-Najar L. Postnatal leptin promotes organ maturation and development in IUGR piglets. PLoS One 2013; 8:e64616. [PMID: 23741353 PMCID: PMC3669417 DOI: 10.1371/journal.pone.0064616] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 04/16/2013] [Indexed: 11/19/2022] Open
Abstract
Babies with intra-uterine growth restriction (IUGR) are at increased risk for experiencing negative neonatal outcomes due to their general developmental delay. The present study aimed to investigate the effects of a short postnatal leptin supply on the growth, structure, and functionality of several organs at weaning. IUGR piglets were injected from day 0 to day 5 with either 0.5 mg/kg/d leptin (IUGRLep) or saline (IUGRSal) and euthanized at day 21. Their organs were collected, weighed, and sampled for histological, biochemical, and immunohistochemical analyses. Leptin induced an increase in body weight and the relative weights of the liver, spleen, pancreas, kidneys, and small intestine without any changes in triglycerides, glucose and cholesterol levels. Notable structural and functional changes occurred in the ovaries, pancreas, and secondary lymphoid organs. The ovaries of IUGRLep piglets contained less oogonia but more oocytes enclosed in primordial and growing follicles than the ovaries of IUGRSal piglets, and FOXO3A staining grade was higher in the germ cells of IUGRLep piglets. Within the exocrine parenchyma of the pancreas, IUGRLep piglets presented a high rate of apoptotic cells associated with a higher trypsin activity. In the spleen and the Peyer's patches, B lymphocyte follicles were much larger in IUGRLep piglets than in IUGRSal piglets. Moreover, IUGRLep piglets showed numerous CD79(+) cells in well-differentiated follicle structures, suggesting a more mature immune system. This study highlights a new role for leptin in general developmental processes and may provide new insight into IUGR pathology.
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Affiliation(s)
- Linda Attig
- UPSP EGEAL Institut Polytechnique LaSalle Beauvais, Beauvais, France
| | - Daphné Brisard
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
- CNRS, UMR7247, Nouzilly, France
- Université François Rabelais de Tours, Tours, France
- IFCE, Nouzilly, France
| | | | - Michal Mickiewicz
- INRA, Unité 1341, Nutrition et Adaptations Digestives, Nerveuses et Comportementales (ADNC), Saint Gilles, France
| | - Paul Guilloteau
- INRA, Unité 1341, Nutrition et Adaptations Digestives, Nerveuses et Comportementales (ADNC), Saint Gilles, France
| | - Samir Boukthir
- Tunis El Manar University, Faculty of Medicine of Tunis, Children’s Hospital, Department of Pediatrics “C”, RU12SP09, Tunis, Tunisia
| | | | - Arieh Gertler
- The Robert Smith Faculty of Agriculture, Food and Environment, Rehovot, Israel
| | - Jean Djiane
- INRA, Centre de recherche, Jouy-en-Josas, France
| | - Danielle Monniaux
- INRA, UMR85 Physiologie de la Reproduction et des Comportements, Nouzilly, France
- CNRS, UMR7247, Nouzilly, France
- Université François Rabelais de Tours, Tours, France
- IFCE, Nouzilly, France
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Ontogeny of the long form of leptin receptor gene expression in the porcine ovarian follicles. Pol J Vet Sci 2013; 16:101-5. [PMID: 23691582 DOI: 10.2478/pjvs-2013-0014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Leptin is a polypeptide hormone produced predominantly in adipocytes. It has been found to be implicated in the regulation of satiety and energy homeostasis. A role for leptin in reproduction was later suggested by findings that this hormone may be involved in the regulation of the hypothalamic-pituitary-gonadal axis via endocrine, paracrine and/or autocrine pathways. The objective of the study was to investigate the ontogeny of the long isoform of leptin receptor (OB-Rb) gene in porcine ovarian follicles. The expression of OB-Rb gene was detected in porcine primordial, primary, secondary and antral follicles by in situ hybridization. In summary, our data suggest that leptin might have a direct effect on porcine follicles and plays an important role in the follicular development.
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Geber S, Brandão AHF, Sampaio M. Effects of estradiol and FSH on leptin levels in women with suppressed pituitary. Reprod Biol Endocrinol 2012; 10:45. [PMID: 22703959 PMCID: PMC3495667 DOI: 10.1186/1477-7827-10-45] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Accepted: 05/29/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Female fertility depends on adequate nutrition and energy reserves, suggesting a correlation between the metabolic reserve and reproductive capacity. Leptin regulates body weight and energy homeostasis. The aim of this study was to investigate whether estradiol or FSH alone has a direct effect on the production of leptin. METHODS A total of 64 patients submitted to controlled ovarian hyperstimulation with recombinant FSH for assisted reproduction and 20 patients using estradiol valerate for endometrial preparation for oocyte donation treatment were included in the study. All patients used GnRH analogues before starting treatment to achieve pituitary suppression. Blood samples for hormonal measurements were collected before starting and after completing the respective treatments. Data were analyzed statistically by the chi-square test, Student's t-test and Pearson's correlation test. RESULTS We observed an elevation of serum leptin levels secondary to the increase in estradiol, in the absence of influence of any other ovarian or pituitary hormone. The rising rate of leptin levels was higher in women treated with recombinant FSH, which also had higher levels of estradiol, than in those treated with estradiol valerate. CONCLUSIONS This study demonstrates a correlation between serum levels of estradiol and leptin, suggesting that estradiol is an important regulator of leptin production and that its effects can be amplified by its association with FSH.
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Affiliation(s)
- Selmo Geber
- Origen, Center for Reproductive Medicine, Avenida do Contorno 7747, Lourdes, CEP, 30110120, Belo Horizonte, MG, Brazil
- Medical School of the Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Augusto HF Brandão
- Medical School of the Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marcos Sampaio
- Origen, Center for Reproductive Medicine, Avenida do Contorno 7747, Lourdes, CEP, 30110120, Belo Horizonte, MG, Brazil
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Reverchon M, Cornuau M, Rame C, Guerif F, Royere D, Dupont J. Chemerin inhibits IGF-1-induced progesterone and estradiol secretion in human granulosa cells. Hum Reprod 2012; 27:1790-800. [DOI: 10.1093/humrep/des089] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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van Tol HTA, Vernooij JCM, Colenbrander B, Gutknecht D, Macklon NS, Roelen BAJ. Expression of leptin receptor mRNA in cumulus cells is correlated with expression of PTX3. Reprod Biomed Online 2010; 20:741-50. [PMID: 20378410 DOI: 10.1016/j.rbmo.2010.03.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Revised: 08/03/2009] [Accepted: 02/02/2010] [Indexed: 10/19/2022]
Abstract
This study investigated the role of the leptin system in human oocyte maturation and its prognostic value for IVF outcome. The protein concentrations of leptin and soluble leptin receptor in follicular fluid were determined and the free leptin index (FLI) were established. Additionally, mRNA expression levels of different leptin receptor (ObR) isoforms and of PTX3 and HAS2 in cumulus cells were quantified, mutually compared and analysed relative to FLI, body mass index, age and number of retrieved oocytes. Expression of all target genes was detected in the cumulus cells, with relatively low concentrations of ObR-Long. Strong mutual correlations were found between mRNA expression levels of leptin receptor isoforms (P < 0.001) and also between the short isoforms of the leptin receptor and PTX3 (P < 0.001). Although the mean values of the pregnant and non-pregnant groups did not differ significantly for any of the variables, the chance that treatment resulted in ongoing pregnancy was higher with leptin 0.5 ng/mg protein compared with concentrations >0.5 ng/mg protein (P < 0.05). It is concluded that the leptin system appears to play a role in the IVF protocol, whereby signal transduction in cumulus cells occurs predominantly via the short isoforms of ObR.
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Affiliation(s)
- Helena T A van Tol
- Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM, Utrecht, The Netherlands.
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Ye Y, Kawamura K, Sasaki M, Kawamura N, Groenen P, Sollewijn Gelpke MD, Kumagai J, Fukuda J, Tanaka T. Leptin and ObRa/MEK signalling in mouse oocyte maturation and preimplantation embryo development. Reprod Biomed Online 2009; 19:181-90. [PMID: 19712552 DOI: 10.1016/s1472-6483(10)60070-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Recent studies indicate that LH stimulates production of ovarian paracrine factors that induce meiosis of the oocyte. DNA microarray analyses of ovarian transcripts were performed in mice and major increases of a short isoform of leptin receptor, ObRa, were identified by the preovulatory LH/human chorionic gonadotrophin (HCG) surge. In oocytes, the level of ObRa transcripts was increased shortly after HCG stimulation, whereas the level of ObRb transcripts was not changed. Leptin was produced by cumulus, granulosa, theca and interstitial cells of ovaries and its transcript level was not regulated during gonadotrophin treatment. Treatment with leptin promoted germinal vesicle breakdown (GVBD) in oocytes within preovulatory follicles, and enhance first polar body extrusion in both cumulus-oocyte complexes and denuded oocytes. The leptin-promoted GVBD and first polar body extrusion were blocked by a mitogen-activated protein kinase extracellular signal regulated kinase kinases (MEK)1/2 inhibitor, U0126, but not its inactive analogue U0124. Furthermore, leptin promoted fertilization of oocytes and the in-vitro development of zygotes to preimplantation embryos. These findings suggest paracrine roles of leptin in the enhancement of nuclear maturation of oocytes through MEK1/2 signalling, and in the promotion of cytoplasmic maturation essential for successful oocyte development to the preimplantation embryos.
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Affiliation(s)
- Yinghui Ye
- Department of Obstetrics and Gynecology, Akita University School of Medicine, Akita, Japan.
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Tena-Sempere M, Barreiro ML, Lage M, Dieguez C, Casanueva FF. Role of leptin and ghrelin in the regulation of gonadal function. Expert Rev Endocrinol Metab 2007; 2:239-249. [PMID: 30754186 DOI: 10.1586/17446651.2.2.239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Gonadal development and function is sustained by the complex interaction of an array of regulatory signals that operate directly on the gonads and/or indirectly via modulation of gonadotropin secretion. During the last decade, different factors primarily involved in the control of food intake and energy balance have been demonstrated as putative modulators of different elements of the reproductive axis, including the gonads, thus helping to define the neuroendocrine basis for the link between body energy stores and fertility. These factors include not only the adipocyte-derived hormone leptin, which is indispensable for proper energy balance and reproduction, but also a number of neuropeptides and hormones of central and peripheral origin. In the latter, growing evidence strongly suggests the involvement of the stomach-secreted peptide ghrelin in the control of several aspects of gonadal function. Interestingly, leptin and ghrelin have been proposed as reciprocally related regulators of energy homeostasis; however, their potential interplay in the control of reproduction remains ill defined. This work will summarize the most salient findings concerning the potential roles of leptin and ghrelin in the functional control of the gonads. In addition, open issues regarding the reproductive facets of these metabolic signals will be highlighted. Overall, the authors propose that through complementary or antagonistic actions, leptin and ghrelin may jointly cooperate to modulate a wide set of reproductive functions, thereby contributing to the physiologic integration of energy balance and reproduction.
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Affiliation(s)
- M Tena-Sempere
- a University of Córdoba, Physiology Section, Department of Cell Biology, Physiology & Immunology, 14004 Córdoba, Spain.
| | - M L Barreiro
- b University of Córdoba, Physiology Section, Department of Cell Biology, Physiology & Immunology, 14004 Córdoba, Spain.
| | - M Lage
- c University of Santiago de Compostela, Department of Medicine, Faculty of Medicine, Complejo Hospitalario Universitario de Santiago, 15705 Santiago de Compostela, Spain.
| | - C Dieguez
- d University of Santiago de Compostela, Department of Physiology, Faculty of Medicine, Complejo Hospitalario Universitario de Santiago, 15705 Santiago de Compostela, Spain.
| | - F F Casanueva
- e University of Santiago de Compostela, Department of Medicine, Faculty of Medicine, Complejo Hospitalario Universitario de Santiago, 15705 Santiago de Compostela, Spain.
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Bibliography. Current world literature. Growth and development. Curr Opin Endocrinol Diabetes Obes 2007; 14:74-89. [PMID: 17940424 DOI: 10.1097/med.0b013e32802e6d87] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bersinger NA, Birkhäuser MH, Wunder DM. Adiponectin as a marker of success in intracytoplasmic sperm injection/embryo transfer cycles. Gynecol Endocrinol 2006; 22:479-83. [PMID: 17071530 DOI: 10.1080/09537100600931316] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Adiponectin (Acrp30) is an adipose tissue-derived protein whose serum concentrations, in contrast to leptin, are reported to be negatively correlated to body mass. In spite of the comparatively high circulating adiponectin concentrations, this protein has not been studied in the context of assisted reproduction to date. The aim of this preliminary project was thus to examine the potential of adiponectin to serve as a marker for fertility. We compared adiponectin levels in serum before and after controlled ovarian hyperstimulation, as well as in follicular fluid (FF), between two groups: those with successful outcome (clinical pregnancies) and those with implantation failure. In the former, adiponectin concentrations were higher than in the negative outcome group; this difference was statistically significant (p < 0.05) in serum on the day of oocyte pick-up (OPU) as well as two or three days before OPU, but not in FF or in serum at the beginning of the stimulation phase. This finding adds a new perspective to the suggested but still controversial reduction in FF leptin concentrations in the positive outcome group, and may become a useful tool for early prediction of success of in vitro fertilization treatment for a given patient.
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Affiliation(s)
- Nick A Bersinger
- Department of Obstetrics and Gynaecology, University of Berne, Berne, Switzerland.
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