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male infertility and metabolic syndrom

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https://www.readbyqxmd.com/read/29447380/sirtuins-in-gamete-biology-and-reproductive-physiology-emerging-roles-and-therapeutic-potential-in-female-and-male-infertility
#1
Carla Tatone, Giovanna Di Emidio, Arcangelo Barbonetti, Gaspare Carta, Alberto M Luciano, Stefano Falone, Fernanda Amicarelli
BACKGROUND: Sirtuins (SIRT1-7) are a family of NAD+-dependent deacetylases that catalyze post-translational modifications of proteins. Together, they respond to metabolic challenges, inflammatory signals or hypoxic/oxidative stress, and are associated with aging and longevity. The role of Sirtuins in the regulation of fertility emerged in 2003 when a defective reproductive phenotype was observed in SIRT1-null mice. Although studies on Sirtuins in reproductive biology have been increasing in the last years, a recent comprehensive update on this issue is still lacking...
February 13, 2018: Human Reproduction Update
https://www.readbyqxmd.com/read/29401269/chronic-hyperandrogenemia-and-western-style-diet-beginning-at-puberty-reduces-fertility-and-increases-metabolic-dysfunction-during-pregnancy-in-young-adult-female-macaques
#2
C V Bishop, R L Stouffer, D L Takahashi, E C Mishler, M C Wilcox, O D Slayden, C A True
STUDY QUESTION: What are the impacts of elevated testosterone (T) and an obesogenic western-style diet (WSD), either independently or together, on fertility and metabolic adaptations of pregnancy in primates? SUMMARY ANSWER: Testosterone increases the time to achieve pregnancy, while a WSD reduces overall fertility, and the combination of testosterone and WSD additionally impairs glucose tolerance and causes pregnancy loss. WHAT IS KNOWN ALREADY: Both hyperandrogenemia and obesity are hallmarks of polycystic ovary syndrome, which is a leading cause of infertility among women worldwide...
February 1, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29392759/endothelial-dysfunction-marker-ykl-40-is-elevated-in-male-patients-with-idiopathic-infertility
#3
S M Hanafy, H H Sabry, J H Sabry, A M Hamed
Metabolic syndrome represents a collection of cardiovascular risk factors, including overweight, hypertension, dyslipidemia and impaired glucose metabolism, with insulin resistance. In recent years, the potential relationship between metabolic syndrome and male factor infertility has been studied. As endothelial dysfunction is the hallmark of metabolic syndrome, the aim of this work was to assess serum levels of YKL-40 as a marker of endothelial dysfunction in male patients with idiopathic infertility. The study revealed that YKL-40 levels were elevated in patients than controls denoting that endothelial dysfunction might play a role in the pathogenesis of idiopathic infertility and that YKL-40 as a marker of endothelial dysfunction could be a useful marker of idiopathic infertility...
February 2, 2018: Andrologia
https://www.readbyqxmd.com/read/29382506/klinefelter-syndrome-more-than-hypogonadism
#4
REVIEW
George A Kanakis, Eberhard Nieschlag
Klinefelter syndrome (KS) is the most frequent chromosome disorder in males (1:650 newborn males), defined by 47,XXY karyotype. The classical phenotype is that of a tall male with relatively long legs, small, firm testes and gynecomastia. Azoospermia and infertility are almost inevitably present, but may be overcome by TESE and ICSI. Nevertheless, a broad spectrum of phenotypes has been described and >70% of the actually existing KS men may remain undiagnosed throughout their lifespan. Accordingly, hypogonadism is usually not evident until early adulthood and progresses with ageing...
January 27, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29371140/the-relationship-between-shift-work-and-men-s-health
#5
REVIEW
Nanfu Deng, Taylor P Kohn, Larry I Lipshultz, Alexander W Pastuszak
BACKGROUND: More than 21 million Americans and nearly 20% of the U.S. workforce are shift workers. Non-standard shift work, defined as work that falls outside of 6 am-6 pm, can lead to poor diet, exercise, and sleep habits that lead to decreased productivity, increased workplace accidents, and a variety of negative health outcomes. AIM: To investigate the associations between shift work exposure and chronic medical conditions such as metabolic syndromes, cardiovascular disease, gastrointestinal disturbances, and depression as well as urologic complications including hypogonadism, male infertility, lower urinary tract symptoms, and prostate cancer with a focus on the effects of shift work sleep disorder (SWSD) on the severity of these negative health outcomes...
January 19, 2018: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/29237379/male-urogen%C3%A4-tal-d%C3%A4-sorders-and-metabol%C3%A4-c-syndrome-poss%C3%A4-ble-l%C3%A4-nks-character%C3%A4-st%C3%A4-cs-and-potent%C3%A4-al-treatment-strateg%C3%A4-es
#6
Cetin Volkan Oztekin, Ecem Kaya, Didem Yilmaz-Oral, Serap Gur
BACKGROUND: Metabolic syndrome (MetS), as a cluster of metabolic derangements which is major risk factors for vascular disease, is one of the most important threats to public health. Although the epidemiological and limited amount of basic science and clinical evidence link MetS to several male urogenital disorders, a holistic approach aiming to define common mechanistic pathways and new possible therapeutic targets are lacking. OBJECTIVE: The current review has focused on providing scientific evidence on the role of MetS and its components on male urogenital disorders and the definition of new therapeutic targets...
December 12, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29136166/diabetes-induced-hyperglycemia-impairs-male-reproductive-function-a-systematic-review
#7
Constanze C Maresch, Dina C Stute, Marco G Alves, Pedro F Oliveira, David M de Kretser, Thomas Linn
BACKGROUND: Hyperglycemia can result from a loss of pancreatic beta-cells or a decline in their function leading to decreased insulin secretion or may arise from insulin resistance and variable degrees of inadequate insulin secretion resulting in diabetes and related comorbidities. To date several reviews have addressed the issue of diabetes-related male infertility but most have focused on how metabolic syndrome causes the decline in male fertility. However, a comprehensive overview as to how diabetes-induced hyperglycemia impairs male fertility is missing...
November 10, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/29062180/evaluation-of-metabolic-syndrome-and-vitamin-d-receptor-gene-polymorphism-in-male-factor-infertility
#8
R Bhakat, L Chandra, A Saxena, A K Sarda, K Krishnamurthy, P Yadav
Male factor infertility (MFI) is a growing health issue in society. The vitamin D receptor gene (VDR) is expressed in many tissues and modulates expression of several other genes. The purpose of this study was to investigate the association between MetSyn, VDR gene (FokI, rs-2228570; C > T) polymorphisms and MFI in Indian adults. Fifty cases and fifty-four controls, fulfilling inclusion and exclusion criteria, were included with their informed consent. Fasting plasma glucose, triglyceride, HDL-C were estimated by clinical chemistry analyzer (Beckmam Coulter DXC 800, USA)...
October 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/29029094/thyroid-hormone-metabolism-defects-in-a-mouse-model-of-sbp2-deficiency
#9
Jiao Fu, Haruki Fujisawa, Benjamin Follman, Xiao-Hui Liao, Alexandra M Dumitrescu
SBP2 (selenocysteine insertion sequence binding protein 2) is an essential factor in selenoprotein synthesis. Patients with SBP2 defects have a characteristic thyroid phenotype and additional manifestations such as growth delay, male infertility, impaired motor coordination and developmental delay. The thyroid phenotype has become pathognomonic for this defect and putative deficiencies in the iodothyronine deiodinases selenoenzymes have been implicated. To investigate the role of SBP2 and selenoproteins in thyroid physiology and answer questions raised by the human syndrome we generated a tamoxifen inducible Sbp2 conditional knockout (iCKO) mouse model...
September 28, 2017: Endocrinology
https://www.readbyqxmd.com/read/28334509/disturbed-testicular-expression-of-the-estrogen-metabolizing-enzymes-cyp1a1-and-comt-in-infertile-men-with-primary-spermatogenic-failure-possible-negative-implications-on-sertoli-cells
#10
A Parada-Bustamante, C Molina, C Valencia, M Flórez, M C Lardone, F Argandoña, A Piottante, M Ebensperguer, P A Orihuela, A Castro
Estradiol (E2 ) is normally metabolized to hydroxyestradiols and methoxyestradiols by CYP1A1, CYP1B1 and COMT. However, an altered production of these metabolites by a disturbed expression of these enzymes is associated with reproductive and non-reproductive pathologies. In vitro studies suggest that increased hydroxyestradiols and methoxyestradiols intratesticular generation is related to male infertility, but no studies have explored whether infertile men have a disturbed testicular expression of the enzymes that generate these E2 metabolites...
May 2017: Andrology
https://www.readbyqxmd.com/read/28330882/adiponectin-and-resistin-potential-metabolic-signals-affecting-hypothalamo-pituitary-gonadal-axis-in-females-and-males-of-different-species
#11
REVIEW
Agnieszka Rak, Namya Mellouk, Pascal Froment, Joëlle Dupont
Adipokines, including adiponectin and resistin, are cytokines produced mainly by the adipose tissue. They play a significant role in metabolic functions that regulate the insulin sensitivity and inflammation. Alterations in adiponectin and resistin plasma levels, or their expression in metabolic and gonadal tissues, are observed in some metabolic pathologies, such as obesity. Several studies have shown that these two hormones and the receptors for adiponectin, AdipoR1 and AdipoR2 are present in various reproductive tissues in both sexes of different species...
June 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28258556/klinefelter-syndrome-cardiovascular-abnormalities-and-metabolic-disorders
#12
REVIEW
A E Calogero, V A Giagulli, L M Mongioì, V Triggiani, A F Radicioni, E A Jannini, D Pasquali
Klinefelter syndrome (KS) is one of the most common genetic causes of male infertility. This condition is associated with much comorbidity and with a lower life expectancy. The aim of this review is to explore more in depth cardiovascular and metabolic disorders associated to KS. KS patients have an increased risk of cerebrovascular disease (standardized mortality ratio, SMR, 2.2; 95% confidence interval, CI, 1.6-3.0), but it is not clear whether the cause of the death is of thrombotic or hemorrhagic nature...
July 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28213128/quantitative-proteomic-analysis-of-human-testis-reveals-system-wide-molecular-and-cellular-pathways-associated-with-non-obstructive-azoospermia
#13
Mehdi Alikhani, Mehdi Mirzaei, Marjan Sabbaghian, Pouria Parsamatin, Razieh Karamzadeh, Samane Adib, Niloofar Sodeifi, Mohammad Ali Sadighi Gilani, Masoud Zabet-Moghaddam, Lindsay Parker, Yunqi Wu, Vivek Gupta, Paul A Haynes, Hamid Gourabi, Hossein Baharvand, Ghasem Hosseini Salekdeh
Male infertility accounts for half of the infertility problems experienced by couples. Azoospermia, having no measurable level of sperm in seminal fluid, is one of the known conditions resulting in male infertility. In order to elucidate the complex molecular mechanisms causing male azoospermia, label-free quantitative shotgun proteomics was carried out on testicular tissue specimens from patients with obstructive azoospermia and non-obstructive azoospermia, including maturation arrest (MA) and Sertoli cell only syndrome (SCOS)...
February 15, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28165461/structure-of-the-homodimeric-androgen-receptor-ligand-binding-domain
#14
Marta Nadal, Stefan Prekovic, Nerea Gallastegui, Christine Helsen, Montserrat Abella, Karolina Zielinska, Marina Gay, Marta Vilaseca, Marta Taulès, Adriaan B Houtsmuller, Martin E van Royen, Frank Claessens, Pablo Fuentes-Prior, Eva Estébanez-Perpiñá
The androgen receptor (AR) plays a crucial role in normal physiology, development and metabolism as well as in the aetiology and treatment of diverse pathologies such as androgen insensitivity syndromes (AIS), male infertility and prostate cancer (PCa). Here we show that dimerization of AR ligand-binding domain (LBD) is induced by receptor agonists but not by antagonists. The 2.15-Å crystal structure of homodimeric, agonist- and coactivator peptide-bound AR-LBD unveils a 1,000-Å(2) large dimerization surface, which harbours over 40 previously unexplained AIS- and PCa-associated point mutations...
February 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/27891185/spermatozoal-cell-death-inducing-dna-fragmentation-factor-%C3%AE-like-effector-a-cidea-gene-expression-and-dna-fragmentation-in-infertile-men-with-metabolic-syndrome-and-normal-seminogram
#15
Ayman Z Elsamanoudy, Hussein Abdelaziz Abdalla, Mohammed Hassanien, Mohammad A Gaballah
BACKGROUND: This is the first study to investigate spermatozoal cell death-inducing DNA fragmentation factor-α-like effector A (CIDEA) gene expression and DNA fragmentations in the spermatozoa of men diagnosed with metabolic syndrome (MS) who have normal seminograms with unexplained infertility, and to correlate these parameters with seminal glucose concentration. METHODS: This study included 120 participants: 75 male subjects with MS (38 fertile and 37 infertile), and a control group of 45 fertile males without MS...
2016: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/27799629/oxidative-stress-and-polycystic-ovary-syndrome-evaluation-during-ovarian-stimulation-for-icsi
#16
Anderson Sanches de Melo, Jhenifer Kliemchen, Alceu Afonso Jordão Junior, Rui A Ferriani, Paula Andrea Navarro
Oxidative stress (OS) may affect natural fertility and the results of assisted reproduction techniques (ARTs). Subfertility associated with polycystic ovary syndrome (PCOS) may be related to OS. This process may intensify during controlled ovarian stimulation (COS) for ARTs because of increased ovarian metabolic activity and hypoestrogenism with the use of gonadotropin-releasing hormone agonists (GnRHas). The objective of this study was to investigate the presence of systemic OS in non-stimulated cycles and to determine OS markers (malondialdehyde [MDA], advanced oxidation protein products [AOPP], hydroperoxides [FOX], glutathione [GSH], and vitamin E) during COS in non-obese infertile women with and without PCOS who were subjected to ARTs...
October 31, 2016: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27752262/effect-of-myoinositol-and-antioxidants-on-sperm-quality-in-men-with-metabolic-syndrome
#17
Mario Montanino Oliva, Elisa Minutolo, Assunta Lippa, Paola Iaconianni, Alberto Vaiarelli
This prospective longitudinal study investigated the effects of a dietary supplement in patients affected by reduced sperm motility (asthenospermic males) with metabolic syndrome. The product tested was Andrositol®, which contains myoinositol (MI) as principal compound, in association with other molecules, and the parameters evaluated were semen characteristics as well as hormone and metabolic profiles. The inclusion criteria were subjects aged over 18 years, with asthenospermia and metabolic syndrome. The exclusion criteria were presence of cryptorchidism, varicocele, and prostatitis...
2016: International Journal of Endocrinology
https://www.readbyqxmd.com/read/27696500/the-rs2274911-polymorphism-in-gprc6a-gene-is-associated-with-insulin-resistance-in-normal-weight-and-obese-subjects
#18
Andrea Di Nisio, Maria Santa Rocca, Gian Paolo Fadini, Luca De Toni, Giorgio Marcuzzo, Maria Cristina Marescotti, Marta Sanna, Mario Plebani, Roberto Vettor, Angelo Avogaro, Carlo Foresta
OBJECTIVE: Identification of the novel endocrine role of osteocalcin (OC) and its receptor GPRC6A has given rise to a new branch of research in OC/GPRC6A axis related to glucose metabolism. GPRC6A- and OC-deficient mice share features of the metabolic syndrome, in addition to male infertility. Recently, the polymorphism rs2274911 in GPRC6A was shown to be associated with testicular impairment. We aimed to investigate the role of rs2274911 polymorphism in glucose and lipid metabolism in a cohort of normal weight and obese subjects DESIGN, PATIENTS, SETTINGS: A total of 392 male and females, including 218 obese patients and 174 age-matched normal weight controls, were retrospectively selected...
February 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/27368157/metabolic-syndrome-in-white-european-men-presenting-for-primary-couple-s-infertility-investigation-of-the-clinical-and-reproductive-burden
#19
E Ventimiglia, P Capogrosso, M Colicchia, L Boeri, A Serino, G Castagna, M C Clementi, G La Croce, C Regina, M Bianchi, V Mirone, R Damiano, F Montorsi, A Salonia
Despite complex interactions between obesity, dyslipidemia, hyperinsulinaemia, and the reproductive axis, the impact of metabolic syndrome on human male reproductive function has not been analysed comprehensively. Complete demographic, clinical, and laboratory data from 1337 consecutive primary infertile men were analysed. Health-significant comorbidities were scored with the Charlson Comorbidity Index (categorised 0 vs. 1 vs. 2 or higher). NCEP-ATPIII criteria were used to define metabolic syndrome. Semen analysis values were assessed based on the 2010 World Health Organisation (WHO) reference criteria...
September 2016: Andrology
https://www.readbyqxmd.com/read/27304785/a-comparison-of-the-hormonal-profile-of-early-androgenetic-alopecia-in-men-with-the-phenotypic-equivalent-of-polycystic-ovarian-syndrome-in-women
#20
Sarita Sanke, Ram Chander, Anju Jain, Taru Garg, Pravesh Yadav
IMPORTANCE: Early androgenetic alopecia (AGA) is patterned hair loss occurring before age 30 years. Early AGA in men is frequently reported as the phenotypic equivalent of polycystic ovarian syndrome (PCOS) in women, which carries the risk of developing obesity, metabolic syndrome, and cardiovascular diseases. Very few studies have been conducted to evaluate this. OBJECTIVE: To study the hormonal profile of men with early AGA and to evaluate if early AGA in men can be considered as the phenotypic equivalent of PCOS, the associated risks of which are well known...
September 1, 2016: JAMA Dermatology
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