1
|
Park JY, Seok JH, Cho KS, Kang DH, Kim JS, Do SH, Na HS, Jang SA, Ahn RS. Association of salivary testosterone levels during the post-awakening period with age and symptoms suggestive of late-onset hypogonadism in men. Ann Med 2024; 56:2356667. [PMID: 38776237 PMCID: PMC11123501 DOI: 10.1080/07853890.2024.2356667] [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: 02/28/2024] [Accepted: 04/23/2024] [Indexed: 05/24/2024] Open
Abstract
BACKGROUND The lack of association between serum testosterone levels and symptoms suggestive of hypogonadism is a significant barrier in the determination of late-onset hypogonadism (LOH) in men. This study explored whether testosterone levels increase after morning awakening, likewise the cortisol awakening response (CAR) in the hypothalamic-pituitary-adrenal (HPA) axis, and whether testosterone levels during the post-awakening period are associated with age and symptoms suggestive of late-onset hypogonadism (LOH) in men. METHODS Testosterone and cortisol levels were determined in saliva samples collected immediately upon awakening and 30 and 60 min after awakening, and scores of the Aging Males' Symptoms (AMS) questionnaire were obtained from 225 healthy adult men. RESULTS A typical CAR (an increase in cortisol level ≥ 2.5 nmol/L above individual baseline) was observed in 155 participants (the subgroup exhibiting typical CAR). In the subgroup exhibiting CAR, testosterone levels sharply increased during the post-awakening period, showing a significant negative correlation with age, total AMS score, and the scores of 11 items on the somatic, psychological, and sexual AMS subscales. Of these items, three sexual items (AMS items #15-17) were correlated with age. Meanwhile, there was no notable increase in testosterone levels and no significant correlation of testosterone levels with age and AMS score in the subgroup exhibiting no typical CAR (n = 70). CONCLUSIONS The results indicate that the hypothalamus-pituitary-gonad (HPG) axis responds to morning awakening, and determining testosterone levels during the post-awakening period in men with typical CAR may be useful for assessing HPG axis function and LOH.
Collapse
Affiliation(s)
- Jai-Young Park
- Department of Anesthesiology and Pain Medicine, Gangneung Asan Hospital, College of Medicine, University of Ulsan, Gangwon, Republic of Korea
| | - Jeong-Ho Seok
- Department of Psychiatry, Yonsei University Gangnam Severance Hospital, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Kang-Su Cho
- Department of Urology, Prostate Cancer Center, Yonsei University Gangnam Severance Hospital, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Dong-Hyun Kang
- Department of Anesthesiology and Pain Medicine, Gangneung Asan Hospital, College of Medicine, University of Ulsan, Gangwon, Republic of Korea
| | - Jin-Sun Kim
- Department of Anesthesiology and Pain Medicine, Gangneung Asan Hospital, College of Medicine, University of Ulsan, Gangwon, Republic of Korea
| | - Sang-Hwan Do
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, Republic of Korea
| | - Hyo-Seok Na
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi, Republic of Korea
| | - Soo-Ah Jang
- Department of Psychiatry, Yonsei University Gangnam Severance Hospital, College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Ryun S. Ahn
- Institute of Behavioral Sciences in Medicine, Yonsei University Gangnam Severance Hospital, College Of Medicine, Yonsei University, Seoul, Republic of Korea
| |
Collapse
|
2
|
Morozov VM, Riva A, Sarwar S, Kim WJ, Li J, Zhou L, Licht J, Daaka Y, Ishov A. HIRA-mediated loading of histone variant H3.3 controls androgen-induced transcription by regulation of AR/BRD4 complex assembly at enhancers. Nucleic Acids Res 2023; 51:10194-10217. [PMID: 37638746 PMCID: PMC10602887 DOI: 10.1093/nar/gkad700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/21/2023] [Accepted: 08/14/2023] [Indexed: 08/29/2023] Open
Abstract
Incorporation of histone variant H3.3 comprises active territories of chromatin. Exploring the function of H3.3 in prostate cancer (PC), we found that knockout (KO) of H3.3 chaperone HIRA suppresses PC growth in vitro and in xenograft settings, deregulates androgen-induced gene expression and alters androgen receptor (AR) binding within enhancers of target genes. H3.3 affects transcription in multiple ways, including activation of p300 by phosphorylated H3.3 at Ser-31 (H3.3S31Ph), which results in H3K27 acetylation (H3K27Ac) at enhancers. In turn, H3K27Ac recruits bromodomain protein BRD4 for enhancer-promoter interaction and transcription activation. We observed that HIRA KO reduces H3.3 incorporation, diminishes H3.3S31Ph and H3K27Ac, modifies recruitment of BRD4. These results suggest that H3.3-enriched enhancer chromatin serves as a platform for H3K27Ac-mediated BRD4 recruitment, which interacts with and retains AR at enhancers, resulting in transcription reprogramming. In addition, HIRA KO deregulates glucocorticoid- (GR) driven transcription of genes co-regulated by AR and GR, suggesting a common H3.3/HIRA-dependent mechanism of nuclear receptors function. Expression of HIRA complex proteins is increased in PC compared with normal prostate tissue, especially in high-risk PC groups, and is associated with a negative prognosis. Collectively, our results demonstrate function of HIRA-dependent H3.3 pathway in regulation of nuclear receptors activity.
Collapse
Affiliation(s)
- Viacheslav M Morozov
- Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Alberto Riva
- Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, USA
| | - Sadia Sarwar
- Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Wan-Ju Kim
- Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Jianping Li
- Division of Hematology/Oncology, University of Florida College of Medicine, Gainesville, FL, USA
| | - Lei Zhou
- Department of Molecular Genetics & Microbiology, University of Florida College of Medicine, Gainesville, FL, USA
- University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Jonathan D Licht
- Division of Hematology/Oncology, University of Florida College of Medicine, Gainesville, FL, USA
- University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Yehia Daaka
- Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
- University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Alexander M Ishov
- Department of Anatomy and Cell Biology, University of Florida College of Medicine, Gainesville, FL, USA
- University of Florida Health Cancer Center, Gainesville, FL, USA
| |
Collapse
|
3
|
Talebi S, Shab-Bidar S, Mohammadi H, Moini A, Djafarian K. The effects of intermittent fasting diet alone or in combination with probiotic supplementation in comparison with calorie-restricted diet on metabolic and hormonal profile in patients with polycystic ovary syndrome: study protocol for a randomized clinical trial. Trials 2023; 24:690. [PMID: 37880791 PMCID: PMC10601288 DOI: 10.1186/s13063-023-07691-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 09/29/2023] [Indexed: 10/27/2023] Open
Abstract
INTRODUCTION Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders in females characterized by ovulatory dysfunction, hyperandrogenism, and other metabolic disorders. Both intermittent fasting and specific probiotics have been suggested to help improve patients with PCOS through changes in gut microbial composition, circadian clock, and metabolic regulation. Therefore, the present study aims to investigate the effects of intermittent fasting alone or in combination with probiotic supplementation compared to the calorie-restricted (CR) diet on anthropometric measures, metabolic status, inflammation, and oxidative stress in women with PCOS. METHODS We will carry out a randomized clinical trial for 8 weeks. Participants will be randomly assigned (1:1:1) to one of the three groups: (1) a 14:10 early time-restricted feeding (TRF) diet with probiotic supplementation (n = 30); (2) a 14:10 early TRF diet with placebo supplementation (n = 30); (3) a CR diet (energy-restricted 25% of required calories) with placebo supplementation as a control group (n = 30). The primary outcomes will be changes in body weight and insulin resistance. However, glycemic control, lipid profile, metabolic parameters, sex hormone-binding globulin, dehydroepiandrosterone, anti-Mullerian hormone, free androgen index, hirsutism, acne, antioxidant and oxidant status, inflammation, anthropometric measures, mental health, sleep quality, appetite, eating behavior, food craving, and blood pressure are secondary outcomes. All outcomes of this study will be evaluated in pre- and post-intervention. DISCUSSION We hypothesized that 10-h TRE administered alone or in combination with probiotic supplementation to overweight and obese PCOS subjects would lead to weight loss and improved metabolic, hormonal, inflammatory, and antioxidant markers compared to control subjects following a standard 3-meal-per-day CR diet. ETHICAL ASPECTS The current trial received approval from the Medical Ethics Committee of Tehran University of Medical Sciences, Tehran, Iran (IR.TUMS.MEDICNE.REC.1401.425). TRIAL REGISTRATION Iranian Registry of Clinical Trials IRCT20121110011421N5. Registered on 3 October 2022.
Collapse
Affiliation(s)
- Sepide Talebi
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
- Students' Scientific Research Center (SSRC), Tehran University of Medical Sciences, Tehran, Iran
| | - Sakineh Shab-Bidar
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamed Mohammadi
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Ashraf Moini
- Breast Disease Research Center (BDRC), Tehran University of Medical Sciences, Tehran, Iran
- Department of Obstetrics and Gynecology, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Kurosh Djafarian
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
4
|
Orsini CA, Truckenbrod LM, Wheeler AR. Regulation of sex differences in risk-based decision making by gonadal hormones: Insights from rodent models. Behav Processes 2022; 200:104663. [PMID: 35661794 PMCID: PMC9893517 DOI: 10.1016/j.beproc.2022.104663] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 04/22/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023]
Abstract
Men and women differ in their ability to evaluate options that vary in their rewards and the risks that are associated with these outcomes. Most studies have shown that women are more risk averse than men and that gonadal hormones significantly contribute to this sex difference. Gonadal hormones can influence risk-based decision making (i.e., risk taking) by modulating the neurobiological substrates underlying this cognitive process. Indeed, estradiol, progesterone and testosterone modulate activity in the prefrontal cortex, amygdala and nucleus accumbens associated with reward and risk-related information. The use of animal models of decision making has advanced our understanding of the intersection between the behavioral, neural and hormonal mechanisms underlying sex differences in risk taking. This review will outline the current state of this literature, identify the current gaps in knowledge and suggest the neurobiological mechanisms by which hormones regulate risky decision making. Collectively, this knowledge can be used to understand the potential consequences of significant hormonal changes, whether endogenously or exogenously induced, on risk-based decision making as well as the neuroendocrinological basis of neuropsychiatric diseases that are characterized by impaired risk taking, such as substance use disorder and schizophrenia.
Collapse
Affiliation(s)
- Caitlin A. Orsini
- Department of Psychology, University of Texas at Austin, Austin, TX, USA,Department of Neurology, University of Texas at Austin, Austin, TX, USA,Waggoner Center for Alcohol and Addiction Research, University of Texas at Austin, Austin, TX, USA,Institute for Neuroscience, University of Texas at Austin, Austin, TX, USA,Correspondence to: Department of Psychology & Neurology, Waggoner Center for Alcohol and Addiction Research, 108 E. Dean Keaton St., Stop A8000, Austin, TX 78712, USA. (C.A. Orsini)
| | - Leah M. Truckenbrod
- Department of Neurology, University of Texas at Austin, Austin, TX, USA,Waggoner Center for Alcohol and Addiction Research, University of Texas at Austin, Austin, TX, USA,Institute for Neuroscience, University of Texas at Austin, Austin, TX, USA
| | - Alexa-Rae Wheeler
- Department of Neurology, University of Texas at Austin, Austin, TX, USA,Waggoner Center for Alcohol and Addiction Research, University of Texas at Austin, Austin, TX, USA,Institute for Neuroscience, University of Texas at Austin, Austin, TX, USA
| |
Collapse
|
5
|
Yao Y, Silver R. Mutual Shaping of Circadian Body-Wide Synchronization by the Suprachiasmatic Nucleus and Circulating Steroids. Front Behav Neurosci 2022; 16:877256. [PMID: 35722187 PMCID: PMC9200072 DOI: 10.3389/fnbeh.2022.877256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 04/11/2022] [Indexed: 11/18/2022] Open
Abstract
Background Steroids are lipid hormones that reach bodily tissues through the systemic circulation, and play a major role in reproduction, metabolism, and homeostasis. All of these functions and steroids themselves are under the regulation of the circadian timing system (CTS) and its cellular/molecular underpinnings. In health, cells throughout the body coordinate their daily activities to optimize responses to signals from the CTS and steroids. Misalignment of responses to these signals produces dysfunction and underlies many pathologies. Questions Addressed To explore relationships between the CTS and circulating steroids, we examine the brain clock located in the suprachiasmatic nucleus (SCN), the daily fluctuations in plasma steroids, the mechanisms producing regularly recurring fluctuations, and the actions of steroids on their receptors within the SCN. The goal is to understand the relationship between temporal control of steroid secretion and how rhythmic changes in steroids impact the SCN, which in turn modulate behavior and physiology. Evidence Surveyed The CTS is a multi-level organization producing recurrent feedback loops that operate on several time scales. We review the evidence showing that the CTS modulates the timing of secretions from the level of the hypothalamus to the steroidogenic gonadal and adrenal glands, and at specific sites within steroidogenic pathways. The SCN determines the timing of steroid hormones that then act on their cognate receptors within the brain clock. In addition, some compartments of the body-wide CTS are impacted by signals derived from food, stress, exercise etc. These in turn act on steroidogenesis to either align or misalign CTS oscillators. Finally this review provides a comprehensive exploration of the broad contribution of steroid receptors in the SCN and how these receptors in turn impact peripheral responses. Conclusion The hypothesis emerging from the recognition of steroid receptors in the SCN is that mutual shaping of responses occurs between the brain clock and fluctuating plasma steroid levels.
Collapse
Affiliation(s)
- Yifan Yao
- Department of Psychology, Columbia University, New York City, NY, United States
- *Correspondence: Yifan Yao,
| | - Rae Silver
- Department of Psychology, Columbia University, New York City, NY, United States
- Department of Neuroscience, Barnard College, New York City, NY, United States
- Department of Psychology, Barnard College, New York City, NY, United States
- Department of Pathology and Cell Biology, Graduate School, Columbia University Irving Medical Center, New York City, NY, United States
| |
Collapse
|
6
|
Ward CT, Boorman DW, Afshar A, Prabhakar A, Fiza B, Pyronneau LR, Kimathi A, Paul C, Moser B, Moll V. A Screening Tool to Detect Chronic Critically Ill Cardiac Surgery Patients at Risk for Low Levels of Testosterone and Somatomedin C: A Prospective Observational Pilot Study. Cureus 2021; 13:e15298. [PMID: 34221757 PMCID: PMC8237911 DOI: 10.7759/cureus.15298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2021] [Indexed: 11/05/2022] Open
Abstract
Objective The neuroendocrine response to critical illness is dichotomous as it is adaptive during the acute phase then transitions to maladaptive as critical illness becomes prolonged in 25-30% of patients. Presently, monitoring all critically ill patients for endocrinopathies is not the standard of care. However, given the negative impact on patient prognosis, a need to identify those at risk for endocrinopathies, may exist. Thus, a screening tool to identify endocrinopathies along the somatotroph and gonadal axes in a cardiothoracic surgery population was developed. Methods A prospective observational pilot study was conducted in two cardiothoracic surgery intensive care units (ICU) within a multi-site healthcare system. Total testosterone and somatomedin C levels were obtained from 20 adult patients who remained in the ICU for greater than seven days after cardiothoracic surgery and were tolerating nutrition, had a risk of malnutrition and a mobility score of moderate to dependent assistance. Results Twenty patients were included for descriptive analysis (seven females). Thirteen patients tested low for total testosterone, with males more likely to have a testosterone-related endocrinopathy as compared to females (100% vs. 0 to 43%, p = 0.0072). A higher proportion of low somatomedin C levels was found in females than males (57% vs. 31%); however, the difference was not statistically significant (p = 0.251). Conclusions The screening tool used in this pilot study accurately predicted low total testosterone in all men and reasonably predicted low somatomedin C in a majority of women. However, the ability of the tool to predict low total testosterone in women and low somatomedin C in men is less certain. A gender-specific screening tool might be necessary to predict hormonal deficiencies.
Collapse
Affiliation(s)
- Ceressa T Ward
- Anesthesiology, Emory University School of Medicine, Atlanta, USA
| | - David W Boorman
- Anesthesiology, Emory University School of Medicine, Atlanta, USA
| | - Ava Afshar
- Pharmacy, Emory University Hospital Midtown, Atlanta, USA
| | - Amit Prabhakar
- Anesthesiology, Emory University School of Medicine, Atlanta, USA
| | - Babar Fiza
- Anesthesiology, Emory University School of Medicine, Atlanta, USA
| | | | - Amber Kimathi
- Food and Nutrition, Emory University Hospital Midtown, Atlanta, USA
| | - Carmen Paul
- Rehab Therapy, Emory University Hospital Midtown, Atlanta, USA
| | - Berthold Moser
- Anesthesiology and Critical Care, See-Spital Horgen, Horgen, CHE
| | - Vanessa Moll
- Anesthesiology, Emory University School of Medicine, Atlanta, USA
| |
Collapse
|
7
|
Hattori Y, Iwata H, Nakajima K, Nomura K, Hayashi K, Toshito T, Hashimoto S, Umemoto Y, Mizoe JE, Ogino H, Shibamoto Y. Changes in sexual function and serum testosterone levels in patients with prostate cancer after image-guided proton therapy. JOURNAL OF RADIATION RESEARCH 2021; 62:517-524. [PMID: 33675355 PMCID: PMC8127670 DOI: 10.1093/jrr/rrab002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/29/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Since sexual function and testosterone levels after image-guided proton therapy (IGPT) have not yet been examined in detail, we prospectively evaluated changes before and after IGPT. Among patients treated with IGPT with or without combined androgen blockade (CAB) therapy between February 2013 and September 2014, patients who agreed to participate in the study and were followed up for >3 years after IGPT were evaluated. Serum testosterone levels were regularly measured together with prostate-specific antigen (PSA) levels before and after IGPT. The Erection Hardness Score (EHS) and the sexual domain summary, function subscale and bother subscale of the sexual domain in the Expanded Prostate Cancer Index Composite (EPIC) were assessed. There were 38 low-risk, 46 intermediate-risk and 43 high- or very-high-risk patients (NCCN classification). Although serum testosterone levels in low-risk patients did not decrease after IGPT, reductions were observed in the average EHS and the sexual domain summary score of the EPIC. In intermediate-, high- and very-high-risk patients, testosterone and PSA levels both increased following the termination of CAB after IGPT, and the average EHS increased. The sexual domain summary score gradually increased, but not above minimally important differences. In intermediate-risk patients, the function subscale increased from 4.4 to 14.8 (P < 0.05) 12 months after IGPT and reached a plateau after 60 months. The results of the present study would suggest the potential of IGPT, and further prospective studies to directly compare IGPT with other modalities are warranted.
Collapse
Affiliation(s)
- Yukiko Hattori
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City West Medical Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan
| | - Hiromitsu Iwata
- Corresponding author. Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City West Medical Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan. Tel: +81 52 991 8577; Fax: +81 52 991 8599; E-mail:
| | - Koichiro Nakajima
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City West Medical Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Kento Nomura
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City West Medical Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Kensuke Hayashi
- Department of Proton Therapy Technology, Nagoya Proton Therapy Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan
| | - Toshiyuki Toshito
- Department of Proton Therapy Physics, Nagoya Proton Therapy Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan
| | - Shingo Hashimoto
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Yukihiro Umemoto
- Department of Nephro-Urology, Nagoya City West Medical Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan
| | - Jun-etsu Mizoe
- Sapporo High Functioning Radiotherapy Center, Hokkaido Ohno Memorial Hospital, 2-1-16-1 Miyanosawa, Nishi-ku, Sapporo 063-0052, Japan
| | - Hiroyuki Ogino
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City West Medical Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya 462-8508, Japan
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Yuta Shibamoto
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| |
Collapse
|
8
|
Oztekin U, Atac F, Caniklioglu M, Sari S, Tokpinar A, Sonmez G. Effects of varicocelectomy on sleep quality: Varicocele may affect sleep quality. UROLOGICAL SCIENCE 2021. [DOI: 10.4103/uros.uros_164_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
9
|
Di Guardo F, Vloeberghs V, Bardhi E, Blockeel C, Verheyen G, Tournaye H, Drakopoulos P. Low Testosterone and Semen Parameters in Male Partners of Infertile Couples Undergoing IVF with a Total Sperm Count Greater than 5 Million. J Clin Med 2020; 9:E3824. [PMID: 33255908 PMCID: PMC7761260 DOI: 10.3390/jcm9123824] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/23/2020] [Accepted: 11/24/2020] [Indexed: 12/17/2022] Open
Abstract
Low serum testosterone is found in approximately 15% of subfertile men. Although testosterone is essential in spermatogenesis, it is unclear whether low testosterone levels may have a negative impact on the semen parameters of men belonging to infertile couples with a total sperm count greater than 5 million. Furthermore, it is debatable whether the initial evaluation of the subfertile male should include an endocrine assessment. This was a retrospective, single-center cohort study conducted at a tertiary fertility clinic. Male partners of infertile couples undergoing in vitro fertilization (IVF), with a total sperm count greater than 5 million, were included. All men provided morning blood samples, and none had been on exogenous testosterone or other relevant medications. Low total testosterone (TT) was defined as <264 ng/dL. Free T was calculated using TT and sex hormone-binding globulin (SHBG) levels (nmol/L) by a constant albumin concentration of 43 g/L. In total, 853 patients were included: 116 had low TT (<264 ng/dL) and 737 had normal TT (≥264 ng/dL). Semen volume, sperm cell count, progressive (A + B) motility and morphology (≥4% strict Kruger) were lower in the low TT group but not significantly different between low and normal TT groups (3.2 ± 1.79 vs. 3.23 ± 1.64, p = 0.87; 76.82 ± 83.18 vs. 67.55 ± 57.70, p = 0.7; 54.89 ± 19.45 vs. 56.25 ± 19.03, p = 0.6; 5.77 ± 3.23 vs. 6.89 ± 3.94, p = 0.23). The percentage of patients with below-reference sperm volume (<1.5 mL), cell count (<15 × 106/mL), motility (A + B) (<32%) and morphology (<4%) was higher in the low TT group but not statistically different compared to the normal TT group. Multivariable regression analysis revealed that low TT and free T levels had no significant effect on the aforementioned semen parameters (coefficient: 3.94, 0.88, 1.37, 0.39; p = 0.53, 0.8, 0.3, 0.2; coefficient: 0.001, 0.06, 0.007, 0.0002; p = 0.73, 0.52, 0.85, 0.98). Despite our robust methodological approach, the presence of biases related to retrospective design cannot be excluded. Our findings highlighted the lack of association between low TT levels and semen parameter alterations in male partners of infertile couples undergoing IVF, with a total sperm count greater than 5 million. However, it is important to emphasize that more patients in the low TT group had subnormal semen parameters, albeit the difference was not statistically significant. Larger, prospective studies are warranted in order to validate these findings, as well as to investigate the existence of a TT threshold below which semen parameters might be negatively affected.
Collapse
Affiliation(s)
- Federica Di Guardo
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Laarbeeklaan, 101-1090 Brussels, Belgium; (F.D.G.); (V.V.); (E.B.); (C.B.); (G.V.); (H.T.)
- Department of General Surgery and Medical Surgical Specialties, Gynecology and Obstetrics Section, University of Catania, Via Santa Sofia 78, 95125 Catania, Italy
| | - Veerle Vloeberghs
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Laarbeeklaan, 101-1090 Brussels, Belgium; (F.D.G.); (V.V.); (E.B.); (C.B.); (G.V.); (H.T.)
| | - Erlisa Bardhi
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Laarbeeklaan, 101-1090 Brussels, Belgium; (F.D.G.); (V.V.); (E.B.); (C.B.); (G.V.); (H.T.)
| | - Christophe Blockeel
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Laarbeeklaan, 101-1090 Brussels, Belgium; (F.D.G.); (V.V.); (E.B.); (C.B.); (G.V.); (H.T.)
| | - Greta Verheyen
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Laarbeeklaan, 101-1090 Brussels, Belgium; (F.D.G.); (V.V.); (E.B.); (C.B.); (G.V.); (H.T.)
| | - Herman Tournaye
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Laarbeeklaan, 101-1090 Brussels, Belgium; (F.D.G.); (V.V.); (E.B.); (C.B.); (G.V.); (H.T.)
| | - Panagiotis Drakopoulos
- Centre for Reproductive Medicine, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Laarbeeklaan, 101-1090 Brussels, Belgium; (F.D.G.); (V.V.); (E.B.); (C.B.); (G.V.); (H.T.)
- Department of Obstetrics and Gynecology, Crete University, 70013 Crete, Greece
| |
Collapse
|
10
|
Yoshino Y, Koga I, Wakabayashi Y, Kitazawa T, Ota Y. Prevalence of and Risk Factors for Low Free Testosterone Levels in Japanese Men with Well-controlled Human Immunodeficiency Virus Infection. Curr HIV Res 2020; 18:381-386. [PMID: 32684150 DOI: 10.2174/1570162x18666200720000344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/26/2020] [Accepted: 07/27/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND The change in the prevalence of hypogonadism with age in men with human immunodeficiency virus (HIV) infection is subject to debate. OBJECTIVE To address this issue, we diagnosed hypogonadism based on serum levels of free testosterone (fTST) rather than total testosterone which is thought to be an inaccurate indicator. We also determined the relationship between age and fTST levels and identified risk factors for hypogonadism in men with HIV infection. METHODS We retrospectively reviewed fTST levels and associated clinical factors in 71 wellcontrolled HIV-infected men who were treated at Teikyo University Hospital between April 2015 and March 2016 and who had data available on serum fTST levels, measured >6 months after starting antiretroviral therapy. fTST was measured using radioimmunoassay on blood samples collected in the morning. Risk factors for hypogonadism were identified using Welch's t-test and multiple regression analysis. RESULTS The men had a mean (± standard deviation) age of 47.4 ± 13.6 years, and mean (± standard deviation) serum fTST level of 13.0 ± 6.1 pg/mL. Fifteen (21.1%) men had hypogonadism based on a fTST <8.5 pg/mL. Serum fTST levels significantly decreased with age (-0.216 pg/mL/year). Older age and low hemoglobin levels were identified as risk factors for hypogonadism. CONCLUSION The men in the study experienced a more rapid decline in fTST levels with age than men in the general population (-0.161 pg/mL/year). Serum fTST levels in men with HIV infection should be monitored, especially in older men and those with low hemoglobin levels.
Collapse
Affiliation(s)
- Yusuke Yoshino
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Ichiro Koga
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | | | - Takatoshi Kitazawa
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
| | - Yasuo Ota
- Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan,Department of Internal Medicine, National Hospital Organization, East Saitama National Hospital, Hasuda, Saitama, Japan
| |
Collapse
|
11
|
Altered circadian clock as a novel therapeutic target for constant darkness-induced insulin resistance and hyperandrogenism of polycystic ovary syndrome. Transl Res 2020; 219:13-29. [PMID: 32119846 DOI: 10.1016/j.trsl.2020.02.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/03/2020] [Accepted: 02/10/2020] [Indexed: 12/13/2022]
Abstract
The mechanisms underlying metabolic and reproductive dysfunction caused by arrhythmic circadian clock and their involvement in polycystic ovary syndrome (PCOS) are not understood. Here, we addressed this issue using rats with constant light or darkness exposure for 8 weeks and human leukocytes and serum of PCOS and non-PCOS patients. Additionally, we utilized HepG2 cells and KGN cells to verify the molecular mechanisms. The arrhythmic expressions of circadian clock genes due to constant darkness induced the metabolic and reproductive hallmarks of PCOS in rats. After exposure to constant darkness, decreased brain and muscle ARNT-like protein 1 (BMAL1) promoted insulin resistance via glucose transporter 4 (GLUT4), and decreased period (PER) 1 and PER2 promoted androgen excess via insulin-like growth factor-binding protein 4 (IGFBP4) and sex hormone binding globulin (SHBG) in the liver. Hyperinsulinemia and hyperandrogenism shared a bidirectional link promoting aberrant expression of circadian genes and inducing apoptosis of ovarian granulosa cells. Notably, the altered expressions of circadian clock genes in darkness-treated rats matched those of PCOS patients. Furthermore, melatonin treatment relieved the hyperinsulinemia and hyperandrogenism of darkness-treated rats via BMAL1, PER1, and PER2. Restoring normal light/dark exposure for 2 weeks reversed these conditions via BMAL1. In conclusion, our findings elucidated the critical function of circadian clock genes, especially BMAL1, PER1, and PER2 in PCOS, which might aid the development of feasible preventive and therapeutic strategies for PCOS in women with biorhythm disorder.
Collapse
|
12
|
Keevil BG, Adaway J. Assessment of free testosterone concentration. J Steroid Biochem Mol Biol 2019; 190:207-211. [PMID: 30970279 DOI: 10.1016/j.jsbmb.2019.04.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/05/2019] [Accepted: 04/06/2019] [Indexed: 02/06/2023]
Abstract
Testosterone (T) is strongly bound to sex hormone binding globulin and measurement of free T may be more appropriate than measuring total serum T, according to the free hormone theory. This view remains controversial and it has its detractors who claim that little extra benefit is gained than simply measuring total T, but it is endorsed by recent clinical practice guidelines for investigation of androgen disorders in both men and women. Free T measurement is very challenging. The gold standard equilibrium dialysis methods are too complex for use in routine clinical laboratories, assays are not harmonized and consequently there are no common reference intervals to aid result interpretation. The algorithms derived for calculating free T are inaccurate because they were founded on faulty models of testosterone binding to SHBG, however they can still give clinically useful results. To negate the effects of differences in binding protein constants, some equations for free T have been derived from accurate measurement of testosterone in large population studies, however a criticism is that the equations may not hold true in different patient populations. The free androgen index is not recommended for use in men because of inaccuracy at extremes of SHBG concentration, and in women it can also give inaccurate results when SHBG concentrations are low. If the free hormone hypothesis is to be believed, then calculated free testosterone may offer the best way forward but better equations are needed to improve accuracy and these should be derived from detailed knowledge of testosterone binding to SHBG. There is still much work to be done to improve harmonization of T and SHBG assays between laboratories because these can have a profound effect on the equations used to calculate free testosterone.
Collapse
Affiliation(s)
- Brian G Keevil
- Department of Clinical Biochemistry, Manchester University Hospital NHS Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK.
| | - Jo Adaway
- Department of Clinical Biochemistry, Manchester University Hospital NHS Trust, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| |
Collapse
|
13
|
van der Pol LD, Groeneveld MG, van Berkel SR, Endendijk JJ, Hallers-Haalboom ET, Mesman J. Fathers: The interplay between testosterone levels and self-control in relation to parenting quality. Horm Behav 2019; 112:100-106. [PMID: 30978338 DOI: 10.1016/j.yhbeh.2019.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 03/12/2019] [Accepted: 04/08/2019] [Indexed: 12/18/2022]
Abstract
In this study, we examined the potential interaction effect between fathers' basal testosterone levels and their ability to control their impulses in relation to their quality of parenting. Participants included 159 fathers and their preschoolers. Evening and morning salivary samples were analyzed with isotope dilution-liquid chromatography-tandem mass spectrometry (ID-LC-MS/MS) to determine basal testosterone (T) levels. During a home-visit, fathers' self-control was measured with a computerized Go/NoGo task, and their sensitivity and respect for child autonomy was observed in a free-play session. We found that higher T levels in the evening were related to less respect for child autonomy, but only in fathers with low self-control. Further, higher T in the evening was related to more sensitive parenting, yet only in fathers with high self-control. These findings indicate that different aspects of fathers' quality of parenting are differently affected by the interaction between T and self-control. Further research is needed to clarify the interplay between fathers' neuro-endocrine system functioning and their trait characteristics in relation to the development of father-child relationships.
Collapse
Affiliation(s)
| | | | | | | | | | - Judi Mesman
- Education and Child Studies, Leiden University, the Netherlands.
| |
Collapse
|
14
|
Impaired sleep is associated with low testosterone in US adult males: results from the National Health and Nutrition Examination Survey. World J Urol 2018; 37:1449-1453. [DOI: 10.1007/s00345-018-2485-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 09/10/2018] [Indexed: 10/28/2022] Open
|
15
|
Eghlidi DH, Garyfallou VT, Kohama SG, Urbanski HF. Age-associated gene expression changes in the arcuate nucleus of male rhesus macaques. J Mol Endocrinol 2017; 59:141-149. [PMID: 28615280 PMCID: PMC5553588 DOI: 10.1530/jme-17-0094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 06/14/2017] [Indexed: 11/08/2022]
Abstract
The hypothalamic arcuate nucleus (ARC) represents a major component of the neuroendocrine reproductive axis and plays an important role in controlling the onset of puberty as well as age-associated reproductive senescence. Although significant gene expression changes have been observed in the ARC during sexual maturation, it is unclear what changes occur during aging, especially in males. Therefore, in the present study, we profiled the expression of reproduction-related genes in the ARC of young and old male rhesus macaques, as well as old males that had received 6 months of hormone supplementation (HS) in the form of daily testosterone and dehydroepiandrosterone; we also compared morning vs night ARC gene expression in the old males. Using Affymetrix gene microarrays, we found little evidence for age-associated expression changes for genes associated with the neuroendocrine reproductive axis, whereas using qRT-PCR, we detected a similar age-associated decrease in PGR (progesterone receptor) that we previously observed in postmenopausal females. We also detected a sex-steroid-dependent and age-associated decrease in androgen receptor (AR) expression, with highest AR levels being expressed at night (i.e., coinciding with the natural peak in daily testosterone secretion). Finally, unlike previous observations made in females, we did not find a significant age-associated increase in KISS1 (Kisspeptin) or TAC3 (Neurokinin B) expression in the ARC of males, most likely because the attenuation of circulating sex-steroid levels in the males was much less than that in postmenopausal females. Taken together, the data highlight some similarities and differences in ARC gene expression between aged male and female nonhuman primates.
Collapse
Affiliation(s)
- Dominique H Eghlidi
- Department of Neurology and Division of Sleep MedicineHarvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Vasilios T Garyfallou
- Division of NeuroscienceOregon National Primate Research Center, Beaverton, Oregon, USA
| | - Steven G Kohama
- Division of NeuroscienceOregon National Primate Research Center, Beaverton, Oregon, USA
| | - Henryk F Urbanski
- Division of NeuroscienceOregon National Primate Research Center, Beaverton, Oregon, USA
- Division of Reproductive & Developmental SciencesOregon National Primate Research Center, Beaverton, Oregon, USA
- Department of Behavioral NeuroscienceOregon Health & Science University, Portland, Oregon, USA
- Department of Physiology & PharmacologyOregon Health & Science University, Portland, Oregon, USA
| |
Collapse
|
16
|
Goldman AL, Bhasin S, Wu FCW, Krishna M, Matsumoto AM, Jasuja R. A Reappraisal of Testosterone's Binding in Circulation: Physiological and Clinical Implications. Endocr Rev 2017; 38:302-324. [PMID: 28673039 PMCID: PMC6287254 DOI: 10.1210/er.2017-00025] [Citation(s) in RCA: 198] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Accepted: 06/23/2017] [Indexed: 02/07/2023]
Abstract
In the circulation, testosterone and other sex hormones are bound to binding proteins, which play an important role in regulating their transport, distribution, metabolism, and biological activity. According to the free hormone hypothesis, which has been debated extensively, only the unbound or free fraction is biologically active in target tissues. Consequently, accurate determination of the partitioning of testosterone between bound and free fractions is central to our understanding of how its delivery to the target tissues and biological activity are regulated and consequently to the diagnosis and treatment of androgen disorders in men and women. Here, we present a historical perspective on the evolution of our understanding of the binding of testosterone to circulating binding proteins. On the basis of an appraisal of the literature as well as experimental data, we show that the assumptions of stoichiometry, binding dynamics, and the affinity of the prevailing models of testosterone binding to sex hormone-binding globulin and human serum albumin are not supported by published experimental data and are most likely inaccurate. This review offers some guiding principles for the application of free testosterone measurements in the diagnosis and treatment of patients with androgen disorders. The growing number of testosterone prescriptions and widely recognized problems with the direct measurement as well as the computation of free testosterone concentrations render this critical review timely and clinically relevant.
Collapse
Affiliation(s)
- Anna L Goldman
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Shalender Bhasin
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Frederick C W Wu
- Andrology Research Unit, Centre for Endocrinology and Diabetes, University of Manchester, Manchester M13 9PT, United Kingdom
| | - Meenakshi Krishna
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| | - Alvin M Matsumoto
- Geriatric Research, Education and Clinical Center, VA Puget Sound Health Care System, Seattle, Washington 98108
- Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Washington, Seattle, Washington 98104
| | - Ravi Jasuja
- Research Program in Men's Health: Aging and Metabolism, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115
| |
Collapse
|
17
|
Fleseriu M, Hashim IA, Karavitaki N, Melmed S, Murad MH, Salvatori R, Samuels MH. Hormonal Replacement in Hypopituitarism in Adults: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2016; 101:3888-3921. [PMID: 27736313 DOI: 10.1210/jc.2016-2118] [Citation(s) in RCA: 457] [Impact Index Per Article: 57.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To formulate clinical practice guidelines for hormonal replacement in hypopituitarism in adults. PARTICIPANTS The participants include an Endocrine Society-appointed Task Force of six experts, a methodologist, and a medical writer. The American Association for Clinical Chemistry, the Pituitary Society, and the European Society of Endocrinology co-sponsored this guideline. EVIDENCE The Task Force developed this evidence-based guideline using the Grading of Recommendations, Assessment, Development, and Evaluation system to describe the strength of recommendations and the quality of evidence. The Task Force commissioned two systematic reviews and used the best available evidence from other published systematic reviews and individual studies. CONSENSUS PROCESS One group meeting, several conference calls, and e-mail communications enabled consensus. Committees and members of the Endocrine Society, the American Association for Clinical Chemistry, the Pituitary Society, and the European Society of Endocrinology reviewed and commented on preliminary drafts of these guidelines. CONCLUSIONS Using an evidence-based approach, this guideline addresses important clinical issues regarding the evaluation and management of hypopituitarism in adults, including appropriate biochemical assessments, specific therapeutic decisions to decrease the risk of co-morbidities due to hormonal over-replacement or under-replacement, and managing hypopituitarism during pregnancy, pituitary surgery, and other types of surgeries.
Collapse
Affiliation(s)
- Maria Fleseriu
- Oregon Health & Science University, Northwest Pituitary Center (M.F.), and Departments of Neurological Surgery and Medicine (Division of Endocrinology, Diabetes, and Clinical Nutrition), Portland, Oregon 97239; Department of Pathology (I.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Institute of Metabolism and Systems Research (N.K.), College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; Centre for Endocrinology, Diabetes, and Metabolism (N.K.), Birmingham Health Partners, Birmingham B15 2TH, United Kingdom, Pituitary Center (S.M.), Cedars-Sinai Medical Center, Los Angeles, California 90048; Mayo Clinic Evidence-Based Practice Center, (M.H.M), Rochester, Minnesota 55905; Department of Medicine, Division of Endocrinology and Metabolism (R.S.), Pituitary Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287; and Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S.), Oregon Health & Science University, Portland, Oregon 97239
| | - Ibrahim A Hashim
- Oregon Health & Science University, Northwest Pituitary Center (M.F.), and Departments of Neurological Surgery and Medicine (Division of Endocrinology, Diabetes, and Clinical Nutrition), Portland, Oregon 97239; Department of Pathology (I.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Institute of Metabolism and Systems Research (N.K.), College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; Centre for Endocrinology, Diabetes, and Metabolism (N.K.), Birmingham Health Partners, Birmingham B15 2TH, United Kingdom, Pituitary Center (S.M.), Cedars-Sinai Medical Center, Los Angeles, California 90048; Mayo Clinic Evidence-Based Practice Center, (M.H.M), Rochester, Minnesota 55905; Department of Medicine, Division of Endocrinology and Metabolism (R.S.), Pituitary Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287; and Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S.), Oregon Health & Science University, Portland, Oregon 97239
| | - Niki Karavitaki
- Oregon Health & Science University, Northwest Pituitary Center (M.F.), and Departments of Neurological Surgery and Medicine (Division of Endocrinology, Diabetes, and Clinical Nutrition), Portland, Oregon 97239; Department of Pathology (I.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Institute of Metabolism and Systems Research (N.K.), College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; Centre for Endocrinology, Diabetes, and Metabolism (N.K.), Birmingham Health Partners, Birmingham B15 2TH, United Kingdom, Pituitary Center (S.M.), Cedars-Sinai Medical Center, Los Angeles, California 90048; Mayo Clinic Evidence-Based Practice Center, (M.H.M), Rochester, Minnesota 55905; Department of Medicine, Division of Endocrinology and Metabolism (R.S.), Pituitary Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287; and Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S.), Oregon Health & Science University, Portland, Oregon 97239
| | - Shlomo Melmed
- Oregon Health & Science University, Northwest Pituitary Center (M.F.), and Departments of Neurological Surgery and Medicine (Division of Endocrinology, Diabetes, and Clinical Nutrition), Portland, Oregon 97239; Department of Pathology (I.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Institute of Metabolism and Systems Research (N.K.), College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; Centre for Endocrinology, Diabetes, and Metabolism (N.K.), Birmingham Health Partners, Birmingham B15 2TH, United Kingdom, Pituitary Center (S.M.), Cedars-Sinai Medical Center, Los Angeles, California 90048; Mayo Clinic Evidence-Based Practice Center, (M.H.M), Rochester, Minnesota 55905; Department of Medicine, Division of Endocrinology and Metabolism (R.S.), Pituitary Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287; and Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S.), Oregon Health & Science University, Portland, Oregon 97239
| | - M Hassan Murad
- Oregon Health & Science University, Northwest Pituitary Center (M.F.), and Departments of Neurological Surgery and Medicine (Division of Endocrinology, Diabetes, and Clinical Nutrition), Portland, Oregon 97239; Department of Pathology (I.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Institute of Metabolism and Systems Research (N.K.), College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; Centre for Endocrinology, Diabetes, and Metabolism (N.K.), Birmingham Health Partners, Birmingham B15 2TH, United Kingdom, Pituitary Center (S.M.), Cedars-Sinai Medical Center, Los Angeles, California 90048; Mayo Clinic Evidence-Based Practice Center, (M.H.M), Rochester, Minnesota 55905; Department of Medicine, Division of Endocrinology and Metabolism (R.S.), Pituitary Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287; and Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S.), Oregon Health & Science University, Portland, Oregon 97239
| | - Roberto Salvatori
- Oregon Health & Science University, Northwest Pituitary Center (M.F.), and Departments of Neurological Surgery and Medicine (Division of Endocrinology, Diabetes, and Clinical Nutrition), Portland, Oregon 97239; Department of Pathology (I.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Institute of Metabolism and Systems Research (N.K.), College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; Centre for Endocrinology, Diabetes, and Metabolism (N.K.), Birmingham Health Partners, Birmingham B15 2TH, United Kingdom, Pituitary Center (S.M.), Cedars-Sinai Medical Center, Los Angeles, California 90048; Mayo Clinic Evidence-Based Practice Center, (M.H.M), Rochester, Minnesota 55905; Department of Medicine, Division of Endocrinology and Metabolism (R.S.), Pituitary Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287; and Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S.), Oregon Health & Science University, Portland, Oregon 97239
| | - Mary H Samuels
- Oregon Health & Science University, Northwest Pituitary Center (M.F.), and Departments of Neurological Surgery and Medicine (Division of Endocrinology, Diabetes, and Clinical Nutrition), Portland, Oregon 97239; Department of Pathology (I.A.H.), University of Texas Southwestern Medical Center, Dallas, Texas 75390; Institute of Metabolism and Systems Research (N.K.), College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom; Centre for Endocrinology, Diabetes, and Metabolism (N.K.), Birmingham Health Partners, Birmingham B15 2TH, United Kingdom, Pituitary Center (S.M.), Cedars-Sinai Medical Center, Los Angeles, California 90048; Mayo Clinic Evidence-Based Practice Center, (M.H.M), Rochester, Minnesota 55905; Department of Medicine, Division of Endocrinology and Metabolism (R.S.), Pituitary Center, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287; and Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S.), Oregon Health & Science University, Portland, Oregon 97239
| |
Collapse
|
18
|
Kiss Z, Ghosh PM. WOMEN IN CANCER THEMATIC REVIEW: Circadian rhythmicity and the influence of 'clock' genes on prostate cancer. Endocr Relat Cancer 2016; 23:T123-T134. [PMID: 27660402 PMCID: PMC5148656 DOI: 10.1530/erc-16-0366] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 09/19/2016] [Indexed: 01/10/2023]
Abstract
The androgen receptor (AR) plays a key role in the development and progression of prostate cancer (CaP). Since the mid-1990s, reports in the literature pointed out higher incidences of CaP in some select groups, such as airline pilots and night shift workers in comparison with those working regular hours. The common finding in these 'high-risk' groups was that they all experienced a deregulation of the body's internal circadian rhythm. Here, we discuss how the circadian rhythm affects androgen levels and modulates CaP development and progression. Circadian rhythmicity of androgen production is lost in CaP patients, with the clock genes Per1 and Per2 decreasing, and Bmal1 increasing, in these individuals. Periodic expression of the clock genes was restored upon administration of the neurohormone melatonin, thereby suppressing CaP progression. Activation of the melatonin receptors and the AR antagonized each other, and therefore the tumour-suppressive effects of melatonin and the clock genes were most clearly observed in the absence of androgens, that is, in conjunction with androgen deprivation therapy (ADT). In addition, a large-scale study found that high-dose radiation was more effective in CaP patients when it was delivered before 17:00 h, compared with those delivered after 17:00 h, suggesting that the therapy was more effective when delivered in synchrony with the patient's circadian clock. As CaP patients are shown to become easily resistant to new therapies, perhaps circadian delivery of these therapeutic agents or delivery in conjunction with melatonin and its novel analogs should be tested to see if they prevent this resistance.
Collapse
Affiliation(s)
- Zsofia Kiss
- VA Northern California Health Care SystemMather, California, USA
- Department of UrologyUniversity of California at Davis, Sacramento, California, USA
| | - Paramita M Ghosh
- VA Northern California Health Care SystemMather, California, USA
- Department of UrologyUniversity of California at Davis, Sacramento, California, USA
- Department of Biochemistry and Molecular MedicineUniversity of California at Davis, Sacramento, California, USA
| |
Collapse
|
19
|
Stolze BR, Gounden V, Gu J, Elliott EA, Masika LS, Abel BS, Merke DP, Skarulis MC, Soldin SJ. An improved micro-method for the measurement of steroid profiles by APPI-LC-MS/MS and its use in assessing diurnal effects on steroid concentrations and optimizing the diagnosis and treatment of adrenal insufficiency and CAH. J Steroid Biochem Mol Biol 2016; 162:110-6. [PMID: 26721696 PMCID: PMC4917495 DOI: 10.1016/j.jsbmb.2015.12.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 12/03/2015] [Accepted: 12/15/2015] [Indexed: 12/12/2022]
Abstract
Our goals were to (1) develop an improved micro-method usable for neonates for steroid profile measurements and a method to measure androsterone, a key steroid in the recently described androgen backdoor pathway together, with dehydroepiandrosterone and (2) to assess if dehydroepiandrosterone diurnal concentration fluctuations exist potentially necessitating strict adherence to time of blood sample draw and requirement of separate time-dependent reference intervals. Liquid chromatography-tandem mass spectrometry was performed with an atmospheric pressure photoionization source [1]. For each sample 50μL (100μL for the backdoor pathway) of serum was deproteinized by adding 75μL (150μL for the backdoor pathway) of acetonitrile containing the internal standards. After centrifugation, 75μL (150μL for the backdoor pathway) of supernatant was diluted with 250μL of water and injected onto a Poroshell 120 EC-C8 column (SB-C8 column for the backdoor pathway). Within-run coefficients of variation ranged from 2.4 to 10.4% and between-day coefficients of variation from 2.9 to 11.2%. Comparison studies yielded correlation coefficient between 0.97 and 1.00 with recoveries of 90% or greater. Our methods analyze a 9 steroid profile and an additional 2 steroid profile (backdoor pathway) with minimal sample volume (usable in neonates optimizing early diagnosis of endocrinopathies and genetic diseases). Low limits of quantitation make these methods ideal for steroid measurement in women and prepubertal children. As diurnal variations of dehydroepiandrosterone and other steroids [2] concentrations are clinically significant we recommend that separate reference intervals be developed for 8 am, 8 pm, and midnight sample draws. The use of this approach in improving the diagnosis of patients with adrenal insufficiency and congenital adrenal hyperplasia is discussed.
Collapse
Affiliation(s)
- Brian R Stolze
- Department of Laboratory Medicine, National Institutes of Health, 10 Center Drive, Building 10, Room 2C-306, Bethesda, MD 20814, USA
| | - Verena Gounden
- Department of Laboratory Medicine, National Institutes of Health, 10 Center Drive, Building 10, Room 2C-306, Bethesda, MD 20814, USA
| | - Jianghong Gu
- Department of Laboratory Medicine, National Institutes of Health, 10 Center Drive, Building 10, Room 2C-306, Bethesda, MD 20814, USA
| | - Elizabeth A Elliott
- Department of Laboratory Medicine, National Institutes of Health, 10 Center Drive, Building 10, Room 2C-306, Bethesda, MD 20814, USA
| | - Likhona S Masika
- Department of Laboratory Medicine, National Institutes of Health, 10 Center Drive, Building 10, Room 2C-306, Bethesda, MD 20814, USA
| | - Brent S Abel
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health, 10Center Drive, Building 10, Room 6-3940, Bethesda, MD, 20814, USA
| | - Deborah P Merke
- Clinical Center and Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health, 10 Center Drive, Building 10, Room 1-2740, Bethesda, MD, 20814, USA
| | - Monica C Skarulis
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Institutes of Health, 10Center Drive, Building 10, Room 6-3940, Bethesda, MD, 20814, USA
| | - Steven J Soldin
- Department of Laboratory Medicine, National Institutes of Health, 10 Center Drive, Building 10, Room 2C-306, Bethesda, MD 20814, USA; Department of Medicine, Division of Endocrinology and Metabolism, Georgetown University, 3700 O St NW, Washington, D.C. 20057, USA.
| |
Collapse
|
20
|
Ghiciuc CM, Dima-Cozma LC, Bercea RM, Lupusoru CE, Mihaescu T, Cozma S, Patacchioli FR. Imbalance in the diurnal salivary testosterone/cortisol ratio in men with severe obstructive sleep apnea: an observational study. Braz J Otorhinolaryngol 2016; 82:529-35. [PMID: 26749455 PMCID: PMC9444622 DOI: 10.1016/j.bjorl.2015.09.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 08/23/2015] [Accepted: 09/08/2015] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION The complex relationship between sleep disorders and hormones could lead to alterations in the production of cortisol and testosterone in obstructive sleep apnea (OSA) patients. OBJECTIVE The purpose of this study was to determine the diurnal trajectories of salivary free-testosterone, free-cortisol and their ratio (T/C). METHODS Ten subjects newly diagnosed with OSA, based on nocturnal polysomnography evaluation and excessive daytime sleepiness, and seven matched controls were consecutively recruited. Cortisol and testosterone were measured in salivary samples collected upon awakening, at noon and in the evening. The psychometric evaluation of anxiety/depression and referred sexual function disturbances was performed to evaluate the presence of neuropsychological comorbidities. RESULTS AND CONCLUSION The main finding was that OSA subjects displayed hypocortisolism upon awakening and a significant reduction in testosterone concentration in the evening in comparison with the control group, which has maintained the physiological testosterone and cortisol diurnal fluctuation, with higher hormone concentrations in the morning and lower concentrations in the evening. The use of data from multiple diurnal measurements rather than a single point allowed the detection of T/C ratio changes of opposite signs at the beginning and end of the day: the OSA subjects had a higher T/C ratio than the controls in the morning, while their T/C ratio was significantly lower than that of the controls in the evening. The imbalances in the anabolic-catabolic diurnal equilibrium suggest that OSA is associated with a dysregulation of the hypothalamic-pituitary-adrenal and hypothalamic-pituitary-gonadal axes, potentially an underlying cause of some of the neuropsychological comorbidities observed in OSA patients.
Collapse
Affiliation(s)
| | - Lucia Corina Dima-Cozma
- University of Medicine and Pharmacy Grigore T. Popa, School of Medicine, Department of Internal Medicine, Iasi, Romania
| | - Raluca Mihaela Bercea
- University of Medicine and Pharmacy Grigore T. Popa, Clinic of Pulmonary Diseases, Iasi, Romania
| | - Catalina Elena Lupusoru
- University of Medicine and Pharmacy Grigore T. Popa, Department of Pharmacology, Iasi, Romania
| | - Traian Mihaescu
- University of Medicine and Pharmacy Grigore T. Popa, Clinic of Pulmonary Diseases, Iasi, Romania
| | - Sebastian Cozma
- University of Medicine and Pharmacy Grigore T. Popa, Department of Otorhinolaryngology, Iasi, Romania
| | | |
Collapse
|
21
|
Abstract
In a study by Gelstein et al., we found that human emotional tears act as a social chemosignal. In the first of three different experiments in that study we observed that sniffing women’s emotional tears reduced the sexual attractiveness attributed by men to pictures of women’s faces. In a study partly titled “Chemosignaling effects of human tears revisited”, Gračanin et al. claim failed replication of this effect in a series of experiments, one they described as “exactly the same procedure” as Gelstein. Given that Gračanin et al. refused our extended offer to jointly replicate the experiment at our expense, we can merely comment on their effort. We find that Gračanin, who are not a chemosignaling laboratory, used methodology that falls short of standards typically applied in chemosignaling research. Thus, their experiments were profoundly different from Gelstein. Finally, we found that in reanalysing their raw data we could in fact replicate the effect from Gelstein. Thus, we conclude that the failed replication in Gračanin is neither a replication nor failed.
Collapse
Affiliation(s)
- Noam Sobel
- a Department of Neurobiology , Weizmann Institute of Science , Rehovot , Israel
| |
Collapse
|
22
|
Endendijk JJ, Hallers-Haalboom ET, Groeneveld MG, van Berkel SR, van der Pol LD, Bakermans-Kranenburg MJ, Mesman J. Diurnal testosterone variability is differentially associated with parenting quality in mothers and fathers. Horm Behav 2016; 80:68-75. [PMID: 26850837 DOI: 10.1016/j.yhbeh.2016.01.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 12/15/2015] [Accepted: 01/29/2016] [Indexed: 01/02/2023]
Abstract
Previous studies on the relation between testosterone (T) levels and parenting have found ample evidence for the challenge hypothesis, demonstrating that high T levels inhibit parental involvement and that becoming a parent is related to a decrease in T levels in both mothers and fathers. However, less is known about the relation between T levels and more qualitative aspects of parenting. In the current study we examined basal T levels and diurnal variability in T levels in relation to mothers' and fathers' parenting quality. Participants included 217 fathers and 124 mothers with two children (3 and 5years of age). Evening and morning salivary T samples were analyzed with radio-immunoassays to determine circulating T levels. Parental sensitivity (i.e., child-centered responsiveness) and respect for children's autonomy were observed during free play in the family home. The results showed that higher evening T levels in mothers were associated with more sensitivity to the oldest and youngest child. Diurnal T variability was more consistently associated with parenting behavior towards their children than basal T levels. For fathers, more diurnal variability in T was associated with more sensitivity and more respect for autonomy with their youngest children. For mothers, more diurnal variability in T was associated with less sensitivity to both children and less respect for the youngest child's autonomy. These findings suggest that the T system might act differently in relation to parenting behavior in males and females.
Collapse
Affiliation(s)
- Joyce J Endendijk
- Centre for Child and Family Studies, Leiden University, The Netherlands
| | | | | | | | | | | | - Judi Mesman
- Centre for Child and Family Studies, Leiden University, The Netherlands.
| |
Collapse
|
23
|
Karlsson SA, Studer E, Kettunen P, Westberg L. Neural Androgen Receptors Modulate Gene Expression and Social Recognition But Not Social Investigation. Front Behav Neurosci 2016; 10:41. [PMID: 27014003 PMCID: PMC4792870 DOI: 10.3389/fnbeh.2016.00041] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 02/22/2016] [Indexed: 12/02/2022] Open
Abstract
The role of sex and androgen receptors (ARs) for social preference and social memory is rather unknown. In this study of mice we compared males, females and males lacking ARs specifically in the nervous system, ARNesDel, with respect to social preference, assessed with the three-chambered apparatus test, and social recognition, assessed with the social discrimination procedure. In the social discrimination test we also evaluated the tentative importance of the sex of the stimulus animal. Novel object recognition and olfaction were investigated to complement the results from the social tests. Gene expression analysis was performed to reveal molecules involved in the effects of sex and androgens on social behaviors. All three test groups showed social preference in the three-chambered apparatus test. In both social tests an AR-independent sexual dimorphism was seen in the persistence of social investigation of female conspecifics, whereas the social interest toward male stimuli mice was similar in all groups. Male and female controls recognized conspecifics independent of their sex, whereas ARNesDel males recognized female but not male stimuli mice. Moreover, the non-social behaviors were not affected by AR deficiency. The gene expression analyses of hypothalamus and amygdala indicated that Oxtr, Cd38, Esr1, Cyp19a1, Ucn3, Crh, and Gtf2i were differentially expressed between the three groups. In conclusion, our results suggest that ARs are required for recognition of male but not female conspecifics, while being dispensable for social investigation toward both sexes. In addition, the AR seems to regulate genes related to oxytocin, estrogen and William’s syndrome.
Collapse
Affiliation(s)
- Sara A Karlsson
- Department of Pharmacology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg Gothenburg, Sweden
| | - Erik Studer
- Department of Pharmacology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg Gothenburg, Sweden
| | - Petronella Kettunen
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg Gothenburg, Sweden
| | - Lars Westberg
- Department of Pharmacology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg Gothenburg, Sweden
| |
Collapse
|
24
|
Abstract
The testis provides not just one but several models of temporal organization. The complexity of its rhythmic function arises in part from its compartmentalization and diversity of cell types: not only does the testis produce gametes, but it also serves as the major source of circulating androgens. Within the seminiferous tubules, the germ cells divide and differentiate while in intimate contact with Sertoli cells. The tubule is highly periodic: a spermatogenic wave travels along its length to determine the timing of the commitment of spermatogonia to differentiate, the phases of meiotic division, and the rate of differentiation of the postmeiotic germ cells. Recent evidence indicates that oscillations of retinoic acid play a major role in determining periodicity of the seminiferous epithelium. In the interstitial space, Leydig cells produce the steroid hormones required both for the completion of spermatogenesis and the development and maintenance of male sexual characteristics throughout the body. This endocrine output also oscillates; although the pulse generator lies outside the gonad, the steroidogenic function of Leydig cells is tuned to a regular episodic input. While the oscillations of the intratubular and interstitial cells have multihour (ultradian) and multiday (infradian) periodicities, respectively, the functions of both compartments also display dramatic seasonal rhythms. Furthermore, circadian rhythms are evident in some of the cell types, although their amplitude and pervasiveness are not as great as in many other tissues of the same organism, and their detection may require methods that recognize the heterogeneity of the testis. This review examines the periodicity of testicular function along multiple time scales.
Collapse
Affiliation(s)
- Eric L Bittman
- Department of Biology and Program in Neuroscience, University of Massachusetts, Amherst, Massachusetts, USA
| |
Collapse
|
25
|
Vern-Gross TZ, Bradley JA, Rotondo RL, Indelicato DJ. Fertility in childhood cancer survivors following cranial irradiation for primary central nervous system and skull base tumors. Radiother Oncol 2015; 117:195-205. [DOI: 10.1016/j.radonc.2015.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 09/21/2015] [Accepted: 10/03/2015] [Indexed: 11/25/2022]
|
26
|
Kumar S, Deb R, Singh U, Ganguly I, Mandal DK, Tyagi S, Kumar M, Sengar G, Sharma S, Singh R, Singh R. Bovine Circadian Locomotor Output Cycles Kaput (CLOCK) and Clusterin (CLU) mRNA Quantitation in Ejaculated Crossbred Bull Spermatozoa. Reprod Domest Anim 2015; 50:505-9. [PMID: 25845404 DOI: 10.1111/rda.12522] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 03/17/2015] [Indexed: 12/22/2022]
Abstract
Mammalian circadian locomotor output cycles kaput (CLOCK) gene encodes a transcription factor that affects both the persistence and the period of circadian rhythms. Earlier reports suggested that CLOCK gene might be associated with male infertility in human. Present investigation, for the first time, reports that CLOCK gene expresses differentially between good and poor quality crossbred bull semen. The relative expression of CLOCK was significantly (p < 0.05) higher among good quality bull semen than motility-impaired ones. Clusterins (CLU) are series of genes associated with a variety of physiological activities including spermatogenesis, apoptosis and degenerative disease conditions. In the present context, we also investigated that the expression of CLU gene was significantly (p < 0.05) higher among motility-impaired crossbred bull semen compared to the good quality one.
Collapse
Affiliation(s)
- S Kumar
- Indian Council of Agricultural Research- Central Institute for Research on Cattle, Meerut, India
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Papantoniou K, Pozo OJ, Espinosa A, Marcos J, Castaño-Vinyals G, Basagaña X, Juanola Pagès E, Mirabent J, Martín J, Such Faro P, Gascó Aparici A, Middleton B, Skene DJ, Kogevinas M. Increased and mistimed sex hormone production in night shift workers. Cancer Epidemiol Biomarkers Prev 2015; 24:854-63. [PMID: 25737330 DOI: 10.1158/1055-9965.epi-14-1271] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/24/2015] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Night shift work has been associated with an increased risk for breast and prostate cancer. The effect of circadian disruption on sex steroid production is a possible underlying mechanism, underinvestigated in humans. We have assessed daily rhythms of sex hormones and melatonin in night and day shift workers of both sexes. METHODS We recruited 75 night and 42 day workers, ages 22 to 64 years, in different working settings. Participants collected urine samples from all voids over 24 hours on a working day. Urinary concentrations of 16 sex steroid hormones and metabolites (estrogens, progestagens, and androgens) and 6-sulfatoxymelatonin were measured in all samples. Mean levels and peak time of total and individual metabolite production were compared between night and day workers. RESULTS Night workers had higher levels of total progestagens [geometric mean ratio (GMR) 1.65; 95% confidence intervals (CI), 1.17-2.32] and androgens (GMR: 1.44; 95% CI, 1.03-2.00), compared with day workers, after adjusting for potential confounders. The increased sex hormone levels among night shift workers were not related to the observed suppression of 6-sulfatoxymelatonin. Peak time of androgens was significantly later among night workers, compared with day workers (testosterone: 12:14 hours; 10:06-14:48 vs. 08:35 hours; 06:52-10:46). CONCLUSIONS We found increased levels of progestagens and androgens as well as delayed peak androgen production in night shift workers compared with day workers. IMPACT The increase and mistiming of sex hormone production may explain part of the increased risk for hormone-related cancers observed in night shift workers.
Collapse
Affiliation(s)
- Kyriaki Papantoniou
- Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain. IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. Universitat Pompeu Fabra (UPF), Barcelona, Spain. CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.
| | - Oscar J Pozo
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Ana Espinosa
- Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain. IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. Universitat Pompeu Fabra (UPF), Barcelona, Spain. CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Josep Marcos
- IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Gemma Castaño-Vinyals
- Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain. IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. Universitat Pompeu Fabra (UPF), Barcelona, Spain. CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Xavier Basagaña
- Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain. IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. Universitat Pompeu Fabra (UPF), Barcelona, Spain. CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Elena Juanola Pagès
- Deparatment d'Empresa i Ocupació de la Generalitat de Catalunya, Barcelona, Spain
| | - Joan Mirabent
- Occupational Health Service, Parc de Salut Mar, Barcelona, Spain. CISAL-Centre for Research in Occupational Health, University Pompeu Fabra, Barcelona, Spain
| | - Jordi Martín
- Ferrocarrils de la Generalitat de Catalunya, Barcelona, Spain
| | | | | | | | - Debra J Skene
- Chronobiology, University of Surrey, Guildford, United Kingdom
| | - Manolis Kogevinas
- Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain. IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. Universitat Pompeu Fabra (UPF), Barcelona, Spain. CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain. National School of Public Health, Athens, Greece
| |
Collapse
|
28
|
Amir D, Ellison PT, Hill KR, Bribiescas RG. Diurnal variation in salivary cortisol across age classes in Ache Amerindian males of Paraguay. Am J Hum Biol 2014; 27:344-8. [PMID: 25327695 DOI: 10.1002/ajhb.22645] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 09/20/2014] [Accepted: 09/28/2014] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES Cortisol levels exhibit a diurnal rhythm in healthy men, with peaks in the morning and troughs in the evening. Throughout age, however, this rhythm tends to flatten. This diurnal flattening has been demonstrated in a majority of industrialized populations, although the results have not been unanimous. Regardless, little attention has been paid to nonindustrialized, foraging populations such as the Ache Amerindians of Paraguay. As testosterone levels had previously been shown to diminish with age in this population (Bribiescas and Hill [2010]: Am J Hum Biol 22: 216-220), we hypothesized that cortisol levels would behave similarly, flattening in rhythmicity over age. METHODS We examined morning and evening salivary cortisol samples in Ache Amerindian men in association with age (n = 40, age range 20-64 years). RESULTS Men in the first age class (<20-29 years) exhibited significantly different morning (AM) and evening (PM) values as did men in the second age class (30-39 years). However, men in the third and fourth age classes (40-49 years, and >50 years, respectively) did not exhibit a significant difference between AM and PM values. CONCLUSION Ache Amerindian men exhibit a flattening of the diurnal rhythm across age classes. Our results were able to capture both within- and between-individual variations in cortisol levels, and reflected age-related contrasts in daily cortisol fluctuations. The flattening of the diurnal rhythm with age among the Ache may reflect a common and shared aspect of male senescence across ecological contexts and lifestyles. Am. J. Hum. Biol. 27:344-348, 2015. © 2014 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Dorsa Amir
- Reproductive Ecology Laboratory, Department of Anthropology, Yale University, New Haven, Connecticut
| | | | | | | |
Collapse
|
29
|
Rajmil O. Más controversias en el tratamiento con testosterona. Rev Int Androl 2014. [DOI: 10.1016/j.androl.2014.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
30
|
Khairullah A, Cousino Klein L, Ingle SM, May MT, Whetzel CA, Susman EJ, Paus T. Testosterone trajectories and reference ranges in a large longitudinal sample of male adolescents. PLoS One 2014; 9:e108838. [PMID: 25268961 PMCID: PMC4182562 DOI: 10.1371/journal.pone.0108838] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 09/05/2014] [Indexed: 01/03/2023] Open
Abstract
PURPOSE Pubertal dynamics plays an important role in physical and psychological development of children and adolescents. We aim to provide reference ranges of plasma testosterone in a large longitudinal sample. Furthermore, we describe a measure of testosterone trajectories during adolescence that can be used in future investigations of development. METHODS We carried out longitudinal measurements of plasma testosterone in 2,216 samples obtained from 513 males (9 to 17 years of age) from the Avon Longitudinal Study of Parents and Children. We used integration of a model fitted to each participant's testosterone trajectory to calculate a measure of average exposure to testosterone over adolescence. We pooled these data with corresponding values reported in the literature to provide a reference range of testosterone levels in males between the ages of 6 and 19 years. RESULTS The average values of total testosterone in the ALSPAC sample range from 0.82 nmol/L (Standard Deviation [SD]: 0.09) at 9 years of age to 16.5 (SD: 2.65) nmol/L at 17 years of age; these values are congruent with other reports in the literature. The average exposure to testosterone is associated with different features of testosterone trajectories such as Peak Testosterone Change, Age at Peak Testosterone Change, and Testosterone at 17 years of age as well as the timing of the growth spurt during puberty. CONCLUSIONS The average exposure to testosterone is a useful measure for future investigations using testosterone trajectories to examine pubertal dynamics.
Collapse
Affiliation(s)
- Ammar Khairullah
- Rotman Research Institute and Institute of Medical Science, University of Toronto, Toronto, Canada
| | - Laura Cousino Klein
- Department of Biobehavioral Health and Penn State Institute of the Neurosciences, The Pennsylvania State University, State College, Pennsylvania, United States of America
| | - Suzanne M. Ingle
- School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
| | - Margaret T. May
- School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
| | - Courtney A. Whetzel
- Department of Biobehavioral Health and the Center for Healthy Aging, The Pennsylvania State University, State College, Pennsylvania, United States of America
| | - Elizabeth J. Susman
- Department of Biobehavioral Health, The Pennsylvania State University, State College, Pennsylvania, United States of America
| | - Tomáš Paus
- Rotman Research Institute and Institute of Medical Science, University of Toronto, Toronto, Canada
- * E-mail:
| |
Collapse
|
31
|
Hodžić A, Ristanović M, Zorn B, Tulić C, Maver A, Novaković I, Peterlin B. Genetic variation in circadian rhythm genes CLOCK and ARNTL as risk factor for male infertility. PLoS One 2013; 8:e59220. [PMID: 23527142 PMCID: PMC3601062 DOI: 10.1371/journal.pone.0059220] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Accepted: 02/12/2013] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND The circadian system has a major role in maintaining homeostasis and proper body functions including reproductive capacity. The aim of this study was to examine whether there is an association between genetic variability in the primary clock genes CLOCK and ARNTL and male infertility in humans. METHODOLOGY/PRINCIPAL FINDINGS We performed a case-control study, where we searched for an association between polymorphisms of CLOCK and ARNTL genes and male infertility in 961 Slovenian and Serbian Caucasian men. The study group consisted of 517 patients with idiopathic infertility and a control group of 444 fertile men. A statistically significant difference was found in genotype distribution between the two groups in the CLOCK gene: rs11932595 (p = 6·10(-5), q = 4·10(-4), OR equaled 1.9 with 95% CI 1.4-2.7), rs6811520 (p = 2·10(-3), q = 8·10(-3), OR = 1.7 with 95% CI 1.2-2.2) and rs6850524 (p = 0.01, q = 0.02, OR = 1.4 with 95% CI 1.1-1.9). Further analyses of haplotypes were consistent with genotyping results. CONCLUSIONS/SIGNIFICANCE We provide evidence that genetic variability in the CLOCK gene might be associated with male infertility warranting further confirmation and mechanistic investigations.
Collapse
Affiliation(s)
- Alenka Hodžić
- Institute of Medical Genetics and Department of Obstetrics and Gynecology, University Medical Centre Ljubljana, Slovenia
| | - Momčilo Ristanović
- Institute of Human Genetics, Faculty of Medicine, University of Belgrade, Serbia
| | - Branko Zorn
- Institute of Medical Genetics and Department of Obstetrics and Gynecology, University Medical Centre Ljubljana, Slovenia
| | - Cane Tulić
- Institute of Urology and Nephrology, Faculty of Medicine, University of Belgrade, Serbia
| | - Aleš Maver
- Institute of Medical Genetics and Department of Obstetrics and Gynecology, University Medical Centre Ljubljana, Slovenia
| | - Ivana Novaković
- Institute of Human Genetics, Faculty of Medicine, University of Belgrade, Serbia
| | - Borut Peterlin
- Institute of Medical Genetics and Department of Obstetrics and Gynecology, University Medical Centre Ljubljana, Slovenia
| |
Collapse
|
32
|
Abstract
Dihydrotestosterone (DHT) is the most potent natural androgen in humans. There has been an increasing interest in this androgen and its role in the development of primary and secondary sexual characteristics as well as its potential roles in diseases ranging from prostate and breast cancer to Alzheimer's disease. Despite the range of pathologies shown to involve DHT there is little evidence for measurement of serum DHT in the management of these diseases. In this review we describe the physiology of DHT production and action, summarize current concepts in the role of DHT in the pathogenesis of various disorders of sexual development, compare current methods for the measurement of DHT and conclude on the clinical utility of DHT measurement. The clinical indications for the measurement of DHT in serum are: investigation of 5α reductase deficiency in infants with ambiguous genitalia and palpable gonads; men with delayed puberty and/or undescended testes; and to confirm the presence of active testicular tissue. Investigation is aided by the use of human chorionic gonadotrophin stimulation. Due to paucity of published data on this procedure, it is important to follow guidelines prescribed by the laboratory performing the analysis to ensure accurate interpretation.
Collapse
Affiliation(s)
- Paula M Marchetti
- SAS Steroid Centre, St James' University Hospital, Block 46, Leeds LS9 7TF, UK.
| | | |
Collapse
|
33
|
Jasienska G, Jasienski M, Ellison PT. Testosterone levels correlate with the number of children in human males, but the direction of the relationship depends on paternal education. EVOL HUM BEHAV 2012. [DOI: 10.1016/j.evolhumbehav.2012.05.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
34
|
Abstract
There is considerable epidemiological evidence that a Western-style diet may increase the risk of certain hormone-dependent conditions in men via its effects on hormone metabolism. Experimental evidence also suggests that dietary factors may exert subtle effects on hormone metabolism. Here we review the clinical and epidemiological evidence that diet is associated with circulating sex hormone levels in men. In comparison with factors such as age and BMI, nutrients do not appear to be strong determinants of sex hormone levels. Dietary intervention studies have not shown that a change in dietary fat and/or dietary fibre intake is associated with changes in circulating sex hormone concentrations over the short term. The data on the effects of dietary phyto-oestrogens on sex hormone levels in men are too limited for conclusions to be drawn. Observational studies between men from different dietary groups have shown that a vegan diet is associated with small but significant increases in sex-hormone-binding globulin and testosterone concentrations in comparison with meat-eaters. However, these studies have not demonstrated that variations in dietary composition have any long-term important effects on circulating bioavailable sex hormone levels in men. This lack of effect may be partly explained by the body's negative feedback mechanism, which balances out small changes in androgen metabolism in order to maintain a constant level of circulating bioavailable androgens. It appears, therefore, that future studies should look for dietary effects on the feedback mechanism itself, or on the metabolism of androgens within the target tissues.
Collapse
Affiliation(s)
- N E Allen
- Imperial Cancer Research Fund Cancer Epidemiology Unit, Gibson Building, Radcliffe Infirmary, Woodstock Road, Oxford OX2 6HE, UK
| | | |
Collapse
|
35
|
Urbanski HF, Sorwell KG. Age-related changes in neuroendocrine rhythmic function in the rhesus macaque. AGE (DORDRECHT, NETHERLANDS) 2012; 34:1111-1121. [PMID: 22198672 PMCID: PMC3448984 DOI: 10.1007/s11357-011-9352-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 12/01/2011] [Indexed: 05/31/2023]
Abstract
Many environmental conditions show rhythmic changes across the 24-h day; these include changes in light intensity, ambient temperature, food availability, and presence or absence of predators. Consequently, many organisms have developed corresponding adaptations, which ensure that specific physiological and behavioral events occur at an appropriate time of the day. In mammals, the underlying mechanism responsible for synchronizing internal biochemical processes with circadian environmental cues has been well studied and is thought to comprise three major components: (1) photoreception by the retina and transmission of neural signals along the retinohypothalamic tract, (2) integration of photoperiodic information with an internal reference circadian pacemaker located in the suprachiasmatic nucleus, and (3) dissemination of circadian information to target organs, via the autonomic nervous system and through humoral pathways. Given the importance that neuroendocrine rhythms play in coordinating normal circadian physiology and behavior, it is plausible that their perturbation during aging contributes to the etiology of age-related pathologies. This mini-review highlights some of the most dramatic rhythmic neuroendocrine changes that occur in primates during aging, focusing primarily on data from the male rhesus macaques (Macaca mulatta). In addition to the age-associated attenuation of hormone levels and reduction of humoral circadian signaling, there are also significant age-related changes in intracrine processing enzymes and hormone receptors which may further affect the functional efficacy of these hormones. Rhesus macaques, like humans, are large diurnal primates and show many of the same physiological and behavioral circadian changes during aging. Consequently, they represent an ideal translational animal model in which to study the causes and consequences of age-associated internal circadian disruption and in which to evaluate novel therapies.
Collapse
Affiliation(s)
- Henryk F Urbanski
- Division of Neuroscience, Oregon National Primate Research Center, 505 NW 185th Avenue, Beaverton, OR 97006, USA.
| | | |
Collapse
|
36
|
Gislefoss RE, Grimsrud TK, Høie K, Mørkrid L. Stability of testosterone measured in male archival serum samples by two different methods. Scandinavian Journal of Clinical and Laboratory Investigation 2012; 72:555-62. [DOI: 10.3109/00365513.2012.705888] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
37
|
Bobjer J, Naumovska M, Giwercman YL, Giwercman A. High prevalence of androgen deficiency and abnormal lipid profile in infertile men with non-obstructive azoospermia. ACTA ACUST UNITED AC 2012; 35:688-94. [PMID: 22519695 DOI: 10.1111/j.1365-2605.2012.01277.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In men with non-obstructive azoospermia (NOA), the risk of hypogonadism is often overlooked. Testicular sperm extraction (TESE) may increase this risk. The objective of this study was to elucidate the prevalence of hypogonadism in NOA-patients, the impact of TESE on hormone balance and the association between testosterone deficiency and dyslipidaemia. Men with NOA who had undergone TESE during the period 2004-2009 were eligible. Hypogonadism was defined as total testosterone <10 nmol/L and/or LH >10 IU/L and/or ongoing androgen replacement therapy. Sixty-five consecutive men who had undergone TESE owing to NOA and from whom post-TESE serum testosterone levels measured before 1100 h were available. Furthermore, 141 fertile men served as controls. Serum concentrations of testosterone, LH and lipids were assessed. Odds ratios (OR) for biochemical hypogonadism were calculated. Pre- and post-TESE hormone levels were compared. Lipid profile was related to testosterone levels. Hypogonadism was found in 47% (95% CI, 0.36, 0.59) of the NOA-men. As compared with fertile controls, the OR for hypogonadism post-TESE was 17 (95% CI 6.6-45). Serum LH (p = 0.03), but not testosterone (p = 0.43), differed significantly pre- and post-TESE. Compared with eugonadal NOA-men, the OR for having deviations in lipid profile was 3.3 (95% CI 1.3-8.8) for the hypogonadal NOA-men. NOA-men are at very high risk of androgen deficiency, which even in young subjects is associated with dyslipidaemia. Medical management of these men should therefore include endocrinological evaluation and follow-up after completion of infertility treatment.
Collapse
Affiliation(s)
- J Bobjer
- Reproductive Medicine Centre, Skåne University Hospital Malmö, Lund University, Malmö, Sweden.
| | | | | | | |
Collapse
|
38
|
Gettler LT, McDade TW, Kuzawa CW. Cortisol and testosterone in Filipino young adult men: evidence for co-regulation of both hormones by fatherhood and relationship status. Am J Hum Biol 2011; 23:609-20. [PMID: 21638512 DOI: 10.1002/ajhb.21187] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Revised: 03/01/2011] [Accepted: 03/24/2011] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVES Although cortisol (CORT) may suppress testosterone (T) production under stress, in many species males' T and CORT are co-elevated during mate acquisition or conspecific competition. It is presently unknown how CORT co-varies with T in relation to fatherhood/relationship status in men. Here we evaluate associations between waking (AM) and pre-bed (PM) salivary CORT and T, and with plasma total T and luteinizing hormone. We also test whether co-elevationor co-downregulation of CORT and T are present in men who are mating-oriented (non-pairbonded, non-fathers) and parenting-oriented (pairbonded and/or fathers), respectively. METHODS Data come from 630 of young adult Filipino males (21-23 years) enrolled in the Cebu Longitudinal Health and Nutrition Survey, a population-based birth cohort study in Cebu City, Philippines. RESULTS T and CORT were positively related in AM (r = 0.37) and PM (r = 0.30) saliva samples (both P < 0.001). The positive relationship between AM measures was strengthened as caloric intake improved (interaction P < 0.05). Mating-oriented men were more likely to have co-elevated PM CORT and T (P < 0.05), defined as being in the highest tertile for both hormones, while parenting-oriented men were more likely to have co-downregulated (lowest tertile for both hormones) AM (P < 0.05) and PM (P < 0.001) CORT and T. CONCLUSIONS CORT and T are positively related upon waking and before bed and are more likely to be co-elevated in mating-oriented men and co-downregulated in parenting-oriented men. Our findings support the interpretation that CORT and T serve complementary roles in facilitating men's mating effort.
Collapse
Affiliation(s)
- Lee T Gettler
- Department of Anthropology, Northwestern University, Evanston, Illinois 60208, USA
| | | | | |
Collapse
|
39
|
Urbanski HF. Role of circadian neuroendocrine rhythms in the control of behavior and physiology. Neuroendocrinology 2011; 93:211-22. [PMID: 21508622 PMCID: PMC3128131 DOI: 10.1159/000327399] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 03/13/2011] [Indexed: 12/27/2022]
Abstract
Hormones play a major role in regulating behavior and physiology, and their efficacy is often dependent on the temporal pattern in which they are secreted. Significant insights into the mechanisms underlying rhythmic hormone secretion have been gained from transgenic rodent models, suggesting that many of the body's rhythmic functions are regulated by a coordinated network of central and peripheral circadian pacemakers. Some neuroendocrine rhythms are driven by transcriptional-posttranslational feedback circuits comprising 'core clock genes', while others represent a cyclic cascade of neuroendocrine events. This review focuses on recent data from the rhesus macaque, a non-human primate model with high clinical translation potential. With primary emphasis on adrenal and gonadal steroids, it illustrates the rhythmic nature of hormone secretion, and discusses the impact that fluctuating hormone levels have on the accuracy of clinical diagnoses and on the design of effective hormone replacement therapies in the elderly. In addition, this minireview raises awareness of the rhythmic expression patterns shown by many genes, and discusses how this could impact interpretation of data obtained from gene profiling studies, especially from nocturnal rodents.
Collapse
Affiliation(s)
- Henryk F Urbanski
- Division of Neuroscience, Oregon National Primate Research Center, Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oreg., USA.
| |
Collapse
|
40
|
Bribiescas RG, Hill KR. Circadian variation in salivary testosterone across age classes in Ache Amerindian males of Paraguay. Am J Hum Biol 2010; 22:216-20. [PMID: 19957265 DOI: 10.1002/ajhb.21012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Testosterone levels exhibit a circadian rhythm in healthy men, with morning levels tending to be higher compared to evening titers. However, circadian rhythms wane with age. Although this has been described in males living within industrialized settings, age-related changes have not received similar attention in populations outside these contexts. Because many nonindustrialized populations, such as Ache Amerindians of Paraguay, exhibit testosterone levels that are lower than what is commonly reported in the clinical literature and lack age-associated variation in testosterone, it was hypothesized that Ache men would not show age-related variation in testosterone circadian rhythms. Diurnal rhythmicity in testosterone within and between Ache men in association with age (n = 52; age range, 18-64) was therefore examined. A significant negative association was evident between the ratio of morning and evening salivary testosterone and age (r = -0.28, P = 0.04). Men in their third decade of life exhibited significant diurnal variation (P = 0.0003), whereas older and younger age classes did not. Men between the ages of 30 and 39 also exhibited a higher AM:PM testosterone ratio compared to 40-49 and 50< year old men (P = 0.002, 0.006). Overall, declines in testosterone with aging may not be universal among human males, however, within-individual analyses of diurnal variation capture age-related contrasts in daily testosterone fluctuations. Circadian rhythmicity differs with age among the Ache and may be a common aspect of reproductive senescence among men regardless of ecological context.
Collapse
Affiliation(s)
- Richard G Bribiescas
- Reproductive Ecology Laboratory, Department of Anthropology, Yale University, New Haven, CT 06511, USA.
| | | |
Collapse
|
41
|
Romerius P, Ståhl O, Moëll C, Relander T, Cavallin-Ståhl E, Wiebe T, Giwercman YL, Giwercman A. Hypogonadism risk in men treated for childhood cancer. J Clin Endocrinol Metab 2009; 94:4180-6. [PMID: 19789207 DOI: 10.1210/jc.2009-0337] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
CONTEXT Pediatric cancer treatment may imply an increased risk of hypogonadism, leading to metabolic disorders and osteoporosis. Such complications are potentially preventable. OBJECTIVE The aim of this study was to assess diagnosis- and treatment-dependent risk of hypogonadism in male childhood cancer survivors (CCS). DESIGN Male CCS who were treated during the period 1970-2002 and who in 2004 were 18-45 yr of age were eligible. SETTING The study was conducted in a university hospital clinic. PATIENTS A consecutive group of CCS treated at Lund University Hospital was selected for the study, of whom 151 (38%) agreed to participate. Furthermore, 141 healthy fertile men served as controls. INTERVENTIONS We measured serum levels of free and total testosterone, SHBG, and LH. MAIN OUTCOME MEASURES Odds ratios (OR) for biochemical hypogonadism, defined as total testosterone less than 10 nmol/liter and/or LH above 10 IU/liter, were calculated and related to type of cancer, treatment received, as well as testicular volume. RESULTS Hypogonadism was more commonly detected in CCS than in controls (OR, 6.7; 95% CI, 2.7, 17). The increased presence of hypogonadism was noted in the following treatment groups: brain surgery, chemotherapy (with and without radiotherapy), and testicular irradiation. Low total testicular volume (<or=24 ml) was associated with a high risk of hypogonadism (OR, 31; 95% CI, 11, 92). CONCLUSION Adult male survivors of childhood cancer are at risk of hypogonadism, which should be acknowledged in the long-term follow-up of these men.
Collapse
Affiliation(s)
- Patrik Romerius
- Departments of Pediatrics, Lund University Hospital, Lund SE-221 85, Sweden
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Brambilla DJ, Matsumoto AM, Araujo AB, McKinlay JB. The effect of diurnal variation on clinical measurement of serum testosterone and other sex hormone levels in men. J Clin Endocrinol Metab 2009; 94:907-13. [PMID: 19088162 PMCID: PMC2681273 DOI: 10.1210/jc.2008-1902] [Citation(s) in RCA: 257] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Although diurnal variation of testosterone and other hormones in men has been well documented, the effect of this variation on sampling during typical clinic hours has not been examined. OBJECTIVE Our objective was to examine temporal variation in serum testosterone and five other hormones in men over normal clinic hours. DESIGN Blood samples were collected at six separate visits, three morning visits 1-3 d apart and three afternoon visits 1-3 d apart. SETTING AND PARTICIPANTS In Boston, MA, 66 men participated, 30-80 yr of age, randomly selected from the Boston Area Community Health Survey who completed at least five visits. MAIN OUTCOME MEASURES The age-specific ratio of hormone level at times ranging from 0801-1600 h to hormone level at 0800 h was calculated. Ratios were calculated from parameter estimates obtained from cosinor models. RESULTS In men 30-40 yr old, testosterone levels were 20-25% lower at 1600 h than at 0800 h. The difference declined with age, with a 10% difference at 70 yr. 17 men with at least one of three measurements less than 300 ng/dl (10.4 nmol/liter) after 1200 h had normal testosterone levels at all three visits before 1200 h (five of eight men 30-47 yr old, four of nine men 66-80 yr old). Much lower levels of diurnal variation were found for dihydrotestosterone, SHBG, LH, FSH, and estradiol at all ages. CONCLUSIONS Our results support the recommendation of restricting testosterone measurements to morning hours in both young and older men. Limited diurnal variation in other hormones indicates that sampling through the day is appropriate.
Collapse
|
43
|
Andersen ML, Tufik S. The effects of testosterone on sleep and sleep-disordered breathing in men: Its bidirectional interaction with erectile function. Sleep Med Rev 2008; 12:365-79. [DOI: 10.1016/j.smrv.2007.12.003] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
44
|
Schlatt S, Pohl CR, Ehmcke J, Ramaswamy S. Age-related changes in diurnal rhythms and levels of gonadotropins, testosterone, and inhibin B in male rhesus monkeys (Macaca mulatta). Biol Reprod 2008; 79:93-9. [PMID: 18367678 DOI: 10.1095/biolreprod.107.066126] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Testosterone shows circadian rhythms in monkeys with low serum levels in the morning hours. The decline relies on a diminished frequency of LH pulses. Inhibin B shows no diurnal patterns. In elderly men, the diurnal rhythm of testosterone is blunted and inhibin levels fall. Here we explore whether aging exerts similar effects in the rhesus monkey. We collected blood samples from groups of young (6-9 yr) and old (12-16 yr) male rhesus monkeys at 20-min intervals for a period of 24 h under remote sampling via a venous catheter. We determined moment-to-moment changes in plasma levels of testosterone, FSH, and LH by RIA, and of inhibin B by ELISA. We found significant diurnal patterns of testosterone in both groups. The circadian rhythm in testosterone was enhanced in older monkeys. Testosterone levels and pulse frequencies dropped significantly below those of young monkeys during midday hours. Diminished pulse frequency of LH appeared to be responsible for the midday testosterone decrease in old monkeys, while LH and testosterone pulse frequency did not change in young monkeys at corresponding time points. Old monkeys showed extended periods of LH-pulse quiescence in the morning and midday hours. Inhibin B and FSH levels were generally lower in old monkeys compared with the young group, but neither inhibin B nor FSH showed circadian rhythms. We conclude from these data that old rhesus monkeys have a more prominent circadian rhythm of LH and testosterone resulting from an extended midday period of quiescence in the hypothalamus-pituitary-gonadal axis.
Collapse
Affiliation(s)
- Stefan Schlatt
- Department of Cell Biology and Physiology, Center for Research in Reproductive Physiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, USA.
| | | | | | | |
Collapse
|
45
|
Cho LW, Kilpatrick ES, Jayagopal V, Diver MJ, Atkin SL. Biological variation of total testosterone, free androgen index and bioavailable testosterone in polycystic ovarian syndrome: implications for identifying hyperandrogenaemia. Clin Endocrinol (Oxf) 2008; 68:390-4. [PMID: 17888022 DOI: 10.1111/j.1365-2265.2007.03053.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Hyperandrogenaemia is one of the three Rotterdam consensus diagnostic criteria for polycystic ovarian syndrome (PCOS) and may be measured by estimation of total testosterone, free androgen index (FAI) or bioavailable testosterone (BioT). The aim of this study was to compare the biological variability of total testosterone with that of the biological variability of both the FAI and BioT, to determine the least variable measurement for clinical practice. DESIGN Comparative study. PATIENTS Blood samples were collected after an overnight fast at 4-day intervals on 10 consecutive occasions from 12 PCOS patients and 11 weight- and age-matched control women. MEASUREMENTS Duplicate samples of stored serum were analysed for total testosterone, SHBG and BioT in a single batch. RESULTS The PCOS group had a significantly higher median BioT, FAI and total testosterone than controls. In both the PCOS and control groups, the intraindividual variance was small and similar for BioT and FAI. There was no significant difference between the within-subject biological coefficient of variation (CV(I)) for BioT, FAI and total testosterone. The maximum and minimum critical differences were +58% and -37% for BioT and +70% and -40% for FAI, respectively. CONCLUSION FAI appears to be the better diagnostic marker to distinguish hyperandrogenism in patients with PCOS, but once diagnosis has been made, all three methods should be equally good in monitoring further changes in the androgen status.
Collapse
Affiliation(s)
- L W Cho
- Department of Medicine, University of Hull, UK.
| | | | | | | | | |
Collapse
|
46
|
Brambilla DJ, O'Donnell AB, Matsumoto AM, McKinlay JB. Intraindividual variation in levels of serum testosterone and other reproductive and adrenal hormones in men. Clin Endocrinol (Oxf) 2007; 67:853-62. [PMID: 18052942 DOI: 10.1111/j.1365-2265.2007.02976.x] [Citation(s) in RCA: 134] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Estimates of intraindividual variation in hormone levels provide the basis for interpreting hormone measurements clinically and for developing eligibility criteria for trials of hormone replacement therapy. However, reliable systematic estimates of such variation are lacking. OBJECTIVE To estimate intraindividual variation of serum total, free and bioavailable testosterone (T), dihydrotestosterone (DHT), SHBG, LH, dehydroepiandrosterone (DHEA), dehydroepiandrosterone sulphate (DHEAS), oestrone, oestradiol and cortisol, and the contributions of biological and assay variation to the total. DESIGN Paired blood samples were obtained 1-3 days apart at entry and again 3 months and 6 months later (maximum six samples per subject). Each sample consisted of a pool of equal aliquots of two blood draws 20 min apart. STUDY PARTICIPANTS Men aged 30-79 years were randomly selected from the respondents to the Boston Area Community Health Survey, a study of the health of the general population of Boston, MA, USA. Analysis was based on 132 men, including 121 who completed all six visits, 8 who completed the first two visits and 3 who completed the first four visits. MEASUREMENTS Day-to-day and 3-month (long-term) intraindividual standard deviations, after transforming measurements to logarithms to eliminate the contribution of hormone level to intraindividual variation. RESULTS Biological variation generally accounted for more of total intraindividual variation than did assay variation. Day-to-day biological variation accounted for more of the total than did long-term biological variation. Short-term variability was greater in hormones with pulsatile secretion (e.g. LH) than those that exhibit less ultradian variation. Depending on the hormone, the intraindividual standard deviations imply that a clinician can expect to see a difference exceeding 18-28% about half the time when two measurements are made on a subject. The difference will exceed 27-54% about a quarter of the time. CONCLUSIONS Given the level of intraindividual variability in hormone levels found in this study, one sample is generally not sufficient to characterize an individual's hormone levels but collecting more than three is probably not warranted. This is true for clinical measurements and for hormone measurements used to determine eligibility for a clinical trial of hormone replacement therapy.
Collapse
|
47
|
Crawford ED, Barqawi AB, O'Donnell C, Morgentaler A. The association of time of day and serum testosterone concentration in a large screening population. BJU Int 2007; 100:509-13. [PMID: 17555474 DOI: 10.1111/j.1464-410x.2007.07022.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
OBJECTIVE To assess testosterone patterns during clinical hours in a large population of men participating in a national screening programme for prostate cancer, as the effect of time of day on serum testosterone concentration is unclear and largely reported in small studies. SUBJECTS AND METHODS Testosterone levels were measured in 3006 men attending the national Prostate Cancer Awareness Week screening programme. Blood samples were obtained between 06.00 and 18.00 hours, whenever men presented for screening. All men completed questionnaires on age, comorbidities, height and weight. Testosterone levels were compared based on four periods, i.e. T1, 06.00-10.00 (632 men), T2, 10.00-12.00 (812), T3, 12.00-14.00 (388), and T4, 14.00-18.00 hours (1174). RESULTS The mean (sd, range) age of the men was 60.3 (9.9, 40-94) years and the mean (sd) testosterone level was 415.2 (190.9) ng/dL. There was no change in mean (sd) testosterone levels over T1, T2 and T3, at 444.9 (206.2), 433.5 (195.8) and 434.4 (181.2) ng/dL, respectively, but levels at T4, at 380.4 (176.4) ng/dL, were lower by approximately 13% (P < 0.05). Advancing age, diabetes and obesity were associated with lower testosterone levels. The percentage of men with biochemical hypogonadism (<300 ng/dL) did not change across all four periods. CONCLUSIONS Testosterone levels in older men are stable throughout the morning and early afternoon, declining only modestly thereafter. Further case-controlled studies are needed to confirm these findings.
Collapse
Affiliation(s)
- E David Crawford
- Surgery and Radiation Oncology, Section of Urologic Oncology, UCHSC, Aurora, CO, USA
| | | | | | | |
Collapse
|
48
|
Martin DM, Wittert G, Burns NR, Haren MT, Sugarman R. Testosterone and cognitive function in ageing men: data from the Florey Adelaide Male Ageing Study (FAMAS). Maturitas 2007; 57:182-94. [PMID: 17287097 DOI: 10.1016/j.maturitas.2006.12.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Revised: 12/18/2006] [Accepted: 12/27/2006] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Recent evidence suggests that declining testosterone levels in ageing males may be associated with both normal and pathological cognitive ageing. The aim of the present analyses was to investigate whether endogenous gonadal steroid levels in males mediate or moderate the associations between age and performance on neuropsychological measures of verbal memory, executive function, and processing speed. METHODS A cross-sectional analysis of the baseline data from 1046 community-dwelling men aged 35-80 years participating in the Florey Adelaide Male Ageing Study (FAMAS). Multiply adjusted analyses included participants' history of medical conditions, anthropometric measurements, medication use, smoking status, alcohol use and mood. Hormone measurements included total testosterone (TT), bioavailable testosterone (BT), calculated free testosterone (cEFT), oestradiol (E2), sex hormone binding globulin (SHBG), follicle stimulating hormone (FSH), and lutenising hormone (LH). Neuropsychological tests included the Fuld Object Memory Evaluation (FOME), Trails A and Trails B. RESULTS In multiply adjusted analyses, higher cEFT and TT levels were associated with both poorer verbal memory and executive function performance and faster processing speed. cEFT levels were found to moderate the relationship between age and verbal memory performance quadratically and to mediate the relationship between age and processing speed. CONCLUSION The results from this study suggest that higher levels of endogenous testosterone, particularly in the elderly, may have deleterious effects on cognitive functioning in men.
Collapse
Affiliation(s)
- Donel M Martin
- School of Psychology, University of Adelaide, South Australia, Australia.
| | | | | | | | | |
Collapse
|
49
|
Walton MJ, Anderson RA, Kicman AT, Elton RA, Ossowska K, Baird DT. A diurnal variation in testicular hormone production is maintained following gonadotrophin suppression in normal men. Clin Endocrinol (Oxf) 2007; 66:123-9. [PMID: 17201811 DOI: 10.1111/j.1365-2265.2006.02696.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE A diurnal variation in serum testosterone in adult men is well recognized, but whether this occurs during exogenous testosterone administration and the degree to which it is endogenous to the testis is unclear. DESIGN A clinical research centre investigation of testicular function in normal men. PATIENTS Twenty normal men were recruited, 10 of whom were investigated during administration of testosterone with etonogestrel to suppress gonadotrophin secretion. MEASUREMENTS Hourly blood samples were taken over 24 h for measurement of testosterone, inhibin B, LH, FSH and cortisol. Urinary excretion of testosterone and the testicular steroid epitestosterone was also measured. RESULTS In the controls, a diurnal variation in serum testosterone and LH but not FSH was detected. The treated group had similar testosterone concentrations but showed no diurnal variation. Periodicity was also detected in inhibin B concentrations in 5 of the controls and in 9 of the treated group, who also showed synchrony not seen in the controls. Both groups showed diurnal variation in cortisol. Urinary testosterone excretion did not show a diurnal variation in either group, but this was apparent for epitestosterone with a morning peak in both groups despite the markedly lower excretion in the treated men. CONCLUSIONS The diurnal variation of testosterone in normal men is due to a change in secretion rather than in clearance and is largely LH driven. An endogenous rhythm in both testicular steroidogenesis (epitestosterone) and Sertoli cell function (inhibin B) is also present.
Collapse
Affiliation(s)
- Melanie J Walton
- Division of Reproductive and Developmental Science, University of Edinburgh, Edinburgh, UK
| | | | | | | | | | | |
Collapse
|
50
|
Gore JL, Swerdloff RS, Rajfer J. Androgen Deficiency in the Etiology and Treatment of Erectile Dysfunction. Urol Clin North Am 2005; 32:457-68, vi-vii. [PMID: 16291037 DOI: 10.1016/j.ucl.2005.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The evaluation and management of erectile dysfunction (ED) has evolved dramatically following the introduction of oral phosphodiesterase-5 inhibitors. Despite the limited role of directed diagnostic testing in the evaluation of the impotent patient, routine de-termination of a serum testosterone likely is indicated based on evidence that testosterone modulates erectile function, that hypogonadism is prevalent among elderly men and men with ED, and that symptomatology alone rarely detects hypogonadism. Forms of testosterone commonly used include oral, parenteral, transdermal, and implantable preparations, each with significant advantages and disadvantages. The risks and benefits of testosterone supplementation have been characterized incompletely and will require further validation before widespread use of testosterone as hormone replacement therapy in aging men.
Collapse
Affiliation(s)
- John L Gore
- Department of Urology, David Geffen School of Medicine, University of California-Los Angeles, CHS Rm 66-124, Los Angeles, CA 90095-1738, USA.
| | | | | |
Collapse
|