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  • Abstract: adrenarche x
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  • Abstract: fertility x
  • Abstract: Gender x
  • Abstract: Hypogonadism x
  • Abstract: infertility x
  • Abstract: Klinefelter x
  • Abstract: menarche x
  • Abstract: menopause x
  • Abstract: testes x
  • Abstract: transsexual x
  • Abstract: Turner x
  • Abstract: sperm* x
  • Abstract: ovary x
  • Abstract: follicles x
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Srdjan Pandurevic Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Ilaria Mancini Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy
Unit of Gynecology and Obstetrics, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Italy

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Dimitri Mitselman Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Matteo Magagnoli Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Rita Teglia Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Roberta Fazzeri Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Paola Dionese Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Carolina Cecchetti Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Massimiliamo Caprio Department of Human Sciences and Quality of Life Promotion, San Raffaele Roma Open University, Rome, Italy
Laboratory of Cardiovascular Endocrinology, IRCCS San Raffaele, Rome, Italy

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Costanzo Moretti Department of Systems Medicine, Unit of Endocrinology, University of Rome Tor Vergata, Rome, Italy

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Justyna Sicinska Dermatology Clinic of CSK MSWiA Hospital, Warsaw, Poland

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Alessandro Agostini Department of Experimental, Diagnostic, and Specialty Medicine, University of Bologna, Bologna, Italy

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Domenica Gazineo Teaching Hospital, S. Orsola Hospital, Bologna, Italy

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Lea Godino Teaching Hospital, S. Orsola Hospital, Bologna, Italy

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Ignacio Sajoux Epigenomics in Endocrinology and Nutrition Group, Instituto de Investigacion Sanitaria (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS/SERGAS), Spain
Medical Department Pronokal Group, Barcelona, Spain

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Flaminia Fanelli Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Cristina M Meriggiola Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy
Unit of Gynecology and Obstetrics, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Italy

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Uberto Pagotto Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Alessandra Gambineri Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Objective

The aim of this study isto assess the efficacy of a very low-calorie ketogenic diet (VLCKD) method vs a Mediterranean low-calorie diet (LCD) in obese polycystic ovary syndrome (PCOS) women of a reproductive age.

Design

Randomized controlled open-label trial was performed in this study. The treatment period was 16 weeks; VLCKD for 8 weeks then LCD for 8 weeks, according to the Pronokal® method (experimental group; n = 15) vs Mediterranean LCD for 16 weeks (control group; n = 15). Ovulation monitoring was carried out at baseline and after 16 weeks, while a clinical exam, bioelectrical impedance analysis (BIA), anthropometry, and biochemical analyses were performed at baseline, at week 8, and at week 16.

Results

BMI decreased significantly in both groups and to a major extent in the experimental group (−13.7% vs −5.1%, P = 0.0003). Significant differences between the experimental and the control groups were also observed in the reduction of waist circumference (−11.4% vs −2.9%), BIA-measured body fat (−24.0% vs −8.1%), and free testosterone (−30.4% vs −12.6%) after 16 weeks (P = 0.0008, P = 0.0176, and P = 0.0009, respectively). Homeostatic model assessment for insulin resistance significantly decreased only in the experimental group (P = 0.0238) but without significant differences with respect to the control group (−23% vs −13.2%, P > 0.05). At baseline, 38.5% of participants in the experimental group and 14.3% of participants in the control group had ovulation, which increased to 84.6% (P = 0.031) and 35.7% (P > 0.05) at the end of the study, respectively.

Conclusion

In obese PCOS patients, 16 weeks of VLCKD protocol with the Pronokal® method was more effective than Mediterranean LCD in reducing total and visceral fat, and in ameliorating hyperandrogenism and ovulatory dysfunction.

Significance statements

To the best of our knowledge, this is the first randomized controlled trial on the use of the VLCKD method in obese PCOS. It demonstrates the superiority of VLCKD with respect to Mediterranean LCD in reducing BMI with an almost selective reduction of fat mass and a unique effect of VLCKD in reducing visceral adiposity, insulin resistance, and in increasing SHBG with a consequent reduction of free testosterone. Interestingly, this study also demonstrates the superiority of the VLCKD protocol in improving ovulation, whose occurrence increased by 46.1% in the group treated by the VLCKD method against a rise of 21.4% in the group treated by Mediterranean LCD. This study extends the therapeutic approach possibilities in obese PCOS women.

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Pravik Solanki Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria, Australia
Alfred Health, Melbourne, Victoria, Australia

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Beng Eu Prahran Market Clinic, Victoria, Australia
Department of General Practice, Melbourne Medical School, The University of Melbourne, Victoria, Australia

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Jeremy Smith Faculty of Science, University of Western Australia, Perth, Australia

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Carolyn Allan Hudson Institute of Medical Research, Melbourne, Victoria, Australia

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Kevin Lee Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria, Australia

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Hypogonadism can result following anabolic steroid abuse. The duration and degree of recovery from anabolic steroid-induced hypogonadism (ASIH) is immensely variable, and there is a paucity of prospective controlled data characterising the trajectory of natural recovery following cessation. This poses difficulties for users trying to stop androgen abuse, and clinicians wanting to assist them. The objective of this paper was to synthesise evidence on the physical, psychological and biochemical patterns of ASIH recovery. We present the pathophysiology of ASIH through a literature review of hypothalamic–pituitary–testosterone axis recovery in supraphysiological testosterone exposure. This is followed by a scoping review of relevant observational and interventional studies published on PubMed and finally, a conclusion that is an easy reference for clinicians helping patients that are recovering from AAS abuse. Results indicate that ASIH recovery depends on age and degree of androgen abuse, with physical changes like testicular atrophy expected to have near full recovery over months to years; spermatogenesis expected to achieve full recovery over months to years; libido returning to baseline over several months (typically less potent than during AAS use); and recovery from gynaecomastia being unlikely. For psychological recovery, data are insufficient and conflicting, indicating a transient withdrawal period which may be followed by persisting longer-term milder symptoms. For biochemical recovery, near complete recovery of testosterone is seen over months, and complete gonadotropin recovery is expected over 3–6 months. Further prospective studies are indicated to more closely describe patterns of recovery.

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Pamela Stratton Office of the Clinical Director, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA

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Neelam Giri Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA

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Sonia Bhala Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA

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Martha M Sklavos Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA

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Blanche P Alter Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA

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Sharon A Savage Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA

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Ligia A Pinto Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA

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Fanconi anemia (FA), dyskeratosis congenita-related telomere biology disorders (DC/TBD), and Diamond–Blackfan anemia (DBA) are inherited bone marrow failure syndromes (IBMFS) with high risks of bone marrow failure, leukemia, and solid tumors. Individuals with FA have reduced fertility. Previously, we showed low levels of anti-Müllerian hormone (AMH), a circulating marker of ovarian reserve, in females with IBMFS. In males, AMH may be a direct marker of Sertoli cell function and an indirect marker of spermatogenesis. In this study, we assessed serum AMH levels in pubertal and postpubertal males with FA, DC/TBD, or DBA and compared this with their unaffected male relatives and unrelated healthy male volunteers. Males with FA had significantly lower levels of AMH (median: 5 ng/mL, range: 1.18–6.75) compared with unaffected male relatives (median: 7.31 ng/mL, range: 3.46–18.82, P = 0.03) or healthy male volunteers (median: 7.66 ng/mL, range: 3.3–14.67, P = 0.008). Males with DC/TBD had lower levels of AMH (median: 3.76 ng/mL, range: 0–8.9) compared with unaffected relatives (median: 5.31 ng/mL, range: 1.2–17.77, P = 0.01) or healthy volunteers (median: 5.995 ng/mL, range: 1.57–14.67, P < 0.001). Males with DBA had similar levels of AMH (median: 3.46 ng/mL, range: 2.32–11.85) as unaffected relatives (median: 4.66 ng/mL, range: 0.09–13.51, P = 0.56) and healthy volunteers (median: 5.81 ng/mL, range: 1.57–14.67, P = 0.10). Our findings suggest a defect in the production of AMH in postpubertal males with FA and DC/TBD, similar to that observed in females. These findings warrant confirmation in larger prospective studies.

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Claus H Gravholt Department of Endocrinology, Aarhus University Hospital, Aarhus, Denmark
Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
Department of Clinical Medicine, Aarhus University, Aarhus, Denmark

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Alberto Ferlin Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy

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Joerg Gromoll Centre of Reproductive Medicine and Andrology, Münster, Germany

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Anders Juul Department of Growth and Reproduction Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark

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Armin Raznahan Section on Developmental Neurogenomics, National Institute of Mental Health Intramural Research Program, National Institutes of Health, Bethesda, Maryland, USA

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Sophie van Rijn Clinical Neurodevelopmental Sciences, Leiden University, Leiden, The Netherlands and TRIXY Center of Expertise, Leiden University Treatment and Expertise Centre (LUBEC), Leiden, The Netherlands

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Alan D Rogol Department of Pediatrics, University of Virginia, Charlottesville, Virginia, USA

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Anne Skakkebæk Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark

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Nicole Tartaglia Department of Pediatrics, Developmental Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA

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Hanna Swaab Clinical Neurodevelopmental Sciences, Leiden University, Leiden, The Netherlands and TRIXY Center of Expertise, Leiden University Treatment and Expertise Centre (LUBEC), Leiden, The Netherlands

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The 3rd International Workshop on Klinefelter Syndrome, Trisomy X, and 47,XYY syndrome was held in Leiden, the Netherlands, on September 12–14, 2022.

Here, we review new data presented at the workshop and discuss scientific and clinical trajectories. We focus on shortcomings in knowledge and therefore point out future areas for research.

We focus on the genetics and genomics of supernumerary sex chromosome syndromes with new data being presented. Most knowledge centre specifically on Klinefelter syndrome, where aspects on testosterone deficiency and the relation to bone, muscle and fat were discussed, as was infertility and the treatment thereof. Both trisomy X and 47,XYY syndrome are frequently affected by infertility.

Transitioning of males with Klinefelter syndrome was addressed, as this seemingly simple process in practise is often difficult.

It is now realized that neurocognitive changes are pervasive in all supernumerary sex chromosome syndromes, which were extensively discussed. New intervention projects were also described, and exciting new data concerning these were presented.

Advocacy organizations were present, describing the enormous burden carried by parents when having to explain their child’s specific syndrome to most professionals whenever in contact with health care and education systems. It was also pointed out that most countries do not have health care systems that diagnose patients with supernumerary sex chromosome syndromes, thus pinpointing a clear deficiency in the current genetic testing and care models.

At the end of the workshop, a roadmap towards the development of new international clinical care guidelines for Klinefelter syndrome was decided.

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Jian Gong School of Basic Medicine, Hubei University of Chinese Medicine, Wuhan, China

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Yinjuan Lv School of Basic Medicine, Hubei University of Chinese Medicine, Wuhan, China

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Yuhao Meng Hubei University of Chinese Medicine, Wuhan, China

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Weiheng Zhang Hubei University of Chinese Medicine, Wuhan, China

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Xiaocui Jiang Hubei University of Chinese Medicine, Wuhan, China

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Min Xiao Laboratory Animal Center, Hubei University of Chinese Medicine, Wuhan, China

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Prenatal stress can lead to the programming of the neuroendocrine system in male offspring, disrupting the hypothalamic testicular axis and adversely affecting the reproductive health of male offspring. This study aimed to determine the long-term effects of prenatal stress on the KISS1 system in male offspring and the effects on reproductive function in male offspring. Sixteen pregnant females were divided into a prenatal control group (PC, n = 8) and a prenatal stress group (PS, n = 8). The PS group was modeled with chronic unpredictable mild stress (CUMS) from day 1 of gestation to full-term delivery. Differences between the two groups in various maternal parameters, including glucocorticoid secretion, litter size, and the effects of male offspring birth weight, the KISS1 system, and reproductive function, were determined. Male offspring of PS dams had lower birth weights compared to prenatal controls.KISS1 gene expression is reduced at birth and in adult PS offspring, and its receptor KISS1-R protein is similarly reduced in PS offspring at birth and adulthood. In adulthood, PS male offspring show significantly reduced sex hormone production, altered testicular morphology, reduced maturation of their supporting cells, and decreased expression of connexin 43 (CX43), leading to an altered sperm microenvironment and reduced sperm quality. In conclusion, prenatal stress leads to adverse changes in the KISS1 system in male offspring and decreased reproductive function.

Open access
Panagiotis Anagnostis Unit of Reproductive Endocrinology, 1st Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece

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Irene Lambrinoudaki 2nd Department of Obstetrics and Gynecology, National and Kapodistrian University of Athens, Medical School, Athens, Greece

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John C Stevenson National Heart and Lung Institute, Imperial College London, Royal Brompton and Harefield Hospitals, Guy’s and St Thomas’ NHS Foundation Trust, London, UK

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Dimitrios G Goulis Unit of Reproductive Endocrinology, 1st Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece

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Cardiovascular disease (CVD) is of major concern in women entering menopause. The changing hormonal milieu predisposes them to increased CVD risk, due to a constellation of risk factors, such as visceral obesity, atherogenic dyslipidemia, dysregulation in glucose homeostasis, non-alcoholic fatty liver disease and arterial hypertension. However, an independent association of menopause per se with increased risk of CVD events has only been proven for early menopause (<45 years). Menopausal hormone therapy (MHT) ameliorates most of the CVD risk factors mentioned above. Transdermal estrogens are the preferable regimen, since they do not increase triglyceride concentrations and they are not associated with increased risk of venous thromboembolic events (VTE). Although administration of MHT should be considered on an individual basis, MHT may reduce CVD morbidity and mortality, if commenced during the early postmenopausal period (<60 years or within ten years since the last menstrual period). In women with premature ovarian insufficiency (POI), MHT should be administered at least until the average age of menopause (50–52 years). MHT is contraindicated in women with a history of VTE and is not currently recommended for the sole purpose of CVD prevention. The risk of breast cancer associated with MHT is generally low and is mainly conferred by the progestogen. Micronized progesterone and dydrogesterone are associated with lower risk compared to other progestogens.

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Mette Bøgehave Department of Clinical Biochemistry, Hospital South West Jutland, University Hospital of Southern Denmark, Esbjerg, Denmark
Unit for Thrombosis Research, Department of Regional Health Research, University of Southern Denmark, Denmark

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Dorte Glintborg Department of Endocrinology, Odense University Hospital, Odense, Denmark
Department of Clinical Research, University of Southern Denmark, Odense, Denmark
OPEN, Open Patient data Explorative Network, Odense University Hospital, Region of Southern Denmark, Odense, Denmark

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Jørgen Brodersen Gram Department of Clinical Biochemistry, Hospital South West Jutland, University Hospital of Southern Denmark, Esbjerg, Denmark
Unit for Thrombosis Research, Department of Regional Health Research, University of Southern Denmark, Denmark

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Else-Marie Bladbjerg Department of Clinical Biochemistry, Hospital South West Jutland, University Hospital of Southern Denmark, Esbjerg, Denmark
Unit for Thrombosis Research, Department of Regional Health Research, University of Southern Denmark, Denmark

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Marianne Skovsager Andersen Department of Endocrinology, Odense University Hospital, Odense, Denmark
Department of Clinical Research, University of Southern Denmark, Odense, Denmark

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Johannes Jakobsen Sidelmann Department of Clinical Biochemistry, Hospital South West Jutland, University Hospital of Southern Denmark, Esbjerg, Denmark
Unit for Thrombosis Research, Department of Regional Health Research, University of Southern Denmark, Denmark

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Introduction

Hypogonadism is prevalent during opioid treatment, and low testosterone concentrations are associated with cardiovascular disease. The effect of testosterone replacement therapy (TRT) on the coagulation system in men with hypogonadism is not clarified. We investigate the effects of TRT on the tissue factor (TF) and contact activation pathways of coagulation in opioid-treated men.

Materials and methods

This was a double-blinded, placebo-controlled study in 37 men with total testosterone < 12 nmol/L randomized to 24 weeks of testosterone injections (n = 17) or placebo (n = 20). Variables of the coagulation system were analysed at baseline and after 24 weeks. Measurements included the TF pathway (endogenous thrombin potential (ETP) and peak thrombin), the contact activation pathway (endogenous kallikrein potential (EKP) and peak kallikrein), coagulation factors (FVII, FX, prothrombin, and FXII), and inhibitors (tissue factor pathway inhibitor (TFPI), protein C, protein S, antithrombin, and C1 esterase inhibitor (C1inh)). Between-group differences at 24 weeks were determined with analysis of covariance. Within-group changes in TRT and placebo were analysed with paired t-test.

Results

Between-group differences at 24 weeks were observed for ETP (P = 0.036), FVII (P = 0.044), FX (P = 0.015), prothrombin (P = 0.003), protein C (P = 0.004), and protein S (P = 0.038). Within the TRT group, ETP, peak thrombin, FVII, FX, prothrombin, TFPI, protein C, FXII, and C1inh decreased and protein S increased (all P < 0.05). Within the placebo group, coagulation outcomes were unchanged.

Conclusion

TRT affects the coagulation system in an anticoagulant direction through suppressed TF pathway in men with opioid-induced hypogonadism.

Open access
Lukas Ochsner Ridder Department of Endocrinology and Internal Medicine and Medical Research Laboratories, Aarhus University Hospital, Aarhus, Denmark
Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark

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Agnethe Berglund Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
Department of Clinical Genetics and Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark

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Kirstine Stochholm Department of Endocrinology and Internal Medicine and Medical Research Laboratories, Aarhus University Hospital, Aarhus, Denmark

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Simon Chang Department of Endocrinology and Internal Medicine and Medical Research Laboratories, Aarhus University Hospital, Aarhus, Denmark
Unit for Thrombosis Research, Hospital of South West Jutland and University of Southern Denmark, Esbjerg, Denmark

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Claus H Gravholt Department of Endocrinology and Internal Medicine and Medical Research Laboratories, Aarhus University Hospital, Aarhus, Denmark
Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
Unit for Thrombosis Research, Hospital of South West Jutland and University of Southern Denmark, Esbjerg, Denmark

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Context

Klinefelter syndrome (KS, 47,XXY) and 47,XYY syndrome are genetic conditions characterized by a supernumerary sex chromosome. The conditions share many traits, but considerable phenotypic differences are seen between the two. Focusing on morbidity, mortality, and socioeconomics, this review highlights similarities and differences.

Methods

Relevant literature was identified through PubMed with the following search terms; 'Klinefelter', '47,XXY', '47,XYY', and 'Jacobs syndrome'. Included journal articles were chosen at the authors’ discretion.

Results

KS and 47,XYY are the most common sex chromosome disorders in males, with an expected prevalence of 152 and 98 per 100,000 newborn males, respectively. Non-diagnosis is extensive, as only about 38% of KS and 18% of 47,XYY are diagnosed. Both conditions are associated with an increased mortality risk and increased risk of a variety of diseases and other health-related problems affecting virtually every organ system. Early diagnosis seems to predict a lesser comorbidity burden. Neurocognitive deficits as well as social and behavioral problems are commonly described. Both syndromes are associated with poor socioeconomicfor example, lower income and educational level and higher rates of crime. Infertility is a hallmark of KS, but fertility seems also reduced in 47,XYY.

Conclusion

Being born as a boy with an extra X or Y chromosome is associated with increased mortality and excess morbidity, partially expressed in a sex chromosome-specific pattern.Both syndromes continue to be greatly underdiagnosed, even thoughearly intervention may improve the overall outcome. Earlier diagnosis to initiate timely counseling and treatment should be emphasized.

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Rafaella Sales de Freitas Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, Brazil

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Thiago F A França Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, Brazil

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Sabine Pompeia Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, Brazil

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Kisspeptins play a crucial role during pubertal development, but little is known about how their peripheral concentrations relate to sexual maturation. This is partly due to the lack of non-invasive, quick, and reliable peripheral kisspeptin measures, which limit widespread testing. Here, we investigated the relationship between kisspeptin concentrations measured from midstream urine samples with 2-h retention periods and developmental markers (age, self-reported pubertal status, and saliva concentrations of testosterone and DHEA sulphate ) in 209 typically developing 9- to 15-year-old males and females. As a result of the study, we found marked sex differences. Kisspeptin concentrations were similar between sexes until around 12 years of age, but, thereafter, kisspeptin concentrations in females did not change significantly, whereas, in males, there was a clear positive correlation with developmental measures. Our results replicate previous findings regarding kisspeptin concentration changes across the pubertal transition obtained from blood samples, suggesting that measuring these peptides in urine has the potential for exploring kisspeptins’ peripheral effects and their associations with pubertal status.

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Sophie van Rijn Clinical Neurodevelopmental Sciences, Leiden University, Wassenaarseweg, Leiden, The Netherlands
TRIXY Center of Expertise, Leiden University Treatment and Expertise Centre (LUBEC), Sandifortdreef, Leiden, The Netherlands
Leiden Institute for Brain and Cognition, Leiden University, Wassenaarseweg, Leiden, The Netherlands

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Kimberly Kuiper Clinical Neurodevelopmental Sciences, Leiden University, Wassenaarseweg, Leiden, The Netherlands
TRIXY Center of Expertise, Leiden University Treatment and Expertise Centre (LUBEC), Sandifortdreef, Leiden, The Netherlands
Leiden Institute for Brain and Cognition, Leiden University, Wassenaarseweg, Leiden, The Netherlands

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Nienke Bouw Clinical Neurodevelopmental Sciences, Leiden University, Wassenaarseweg, Leiden, The Netherlands
TRIXY Center of Expertise, Leiden University Treatment and Expertise Centre (LUBEC), Sandifortdreef, Leiden, The Netherlands
Department of Child and Adolescent Psychiatry/Psychology, Erasmus MC, Sophia Children’s Hospital, Dr. Molewaterplein, Rotterdam, The Netherlands

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Evelien Urbanus Clinical Neurodevelopmental Sciences, Leiden University, Wassenaarseweg, Leiden, The Netherlands
TRIXY Center of Expertise, Leiden University Treatment and Expertise Centre (LUBEC), Sandifortdreef, Leiden, The Netherlands
Department of Clinical, Neuro, and Developmental Psychology, Vrije Universiteit Amsterdam, Van der Boechorststraat, Amsterdam, The Netherlands

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Hanna Swaab Clinical Neurodevelopmental Sciences, Leiden University, Wassenaarseweg, Leiden, The Netherlands
TRIXY Center of Expertise, Leiden University Treatment and Expertise Centre (LUBEC), Sandifortdreef, Leiden, The Netherlands
Leiden Institute for Brain and Cognition, Leiden University, Wassenaarseweg, Leiden, The Netherlands

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Investigating sex chromosome trisomies (SCTs) may help in understanding neurodevelopmental pathways underlying the risk for neurobehavioral problems and psychopathology. Knowledge about the neurobehavioral phenotype is needed to improve clinical care and early intervention for children with SCT. This is especially relevant considering the increasing number of early diagnosed children with the recent introduction of noninvasive prenatal screening. The TRIXY Early Childhood Study is a longitudinal study designed to identify early neurodevelopmental risks in children with SCT, aged 1–7 years. This review summarizes the results from the TRIXY Early Childhood Study, focusing on early behavioral symptoms in areas of autism spectrum disorder, attention-deficit hyperactivity disorder, and communication disorders, and underlying neurocognitive mechanisms in domains of language, emotion regulation, executive functioning, and social cognition. Behavioral symptoms were assessed through structured behavior observation and parental questionnaires. Neurocognition was measured using performance tests, eyetracking, and psychophysiological measures of arousal. In total, 209 children aged 1–7 years were included: 107 children with SCT (33 XXX, 50 XXY, and 24 XYY) and 102 age-matched population controls. Study outcomes showed early behavioral symptoms in young children with SCT, and neurocognitive vulnerabilities, already from an early age onward. Neurobehavioral and neurocognitive difficulties tended to become more pronounced with increasing age and were rather robust, independent of specific karyotype, pre/postnatal diagnosis, or ascertainment strategy. A more longitudinal perspective on neurodevelopmental ‘at-risk’ pathways is warranted, also including studies assessing the effectiveness of targeted early interventions. Neurocognitive markers that signal differences in neurodevelopment may prove to be helpful in this. Focusing on early development of language, social cognition, emotion regulation, and executive functioning may help in uncovering early essential mechanisms of (later) neurobehavioral outcome, allowing for more targeted support and early intervention.

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