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Walravens J, Sleumer B, Vos MJ, Snaterse G, Narinx N, Antonio L, Reyns T, Fiers T, Kema IP, Kaufman JM, van de Merbel NC, Lapauw B. SHBG gene polymorphisms and their influence on serum SHBG, total and free testosterone concentrations in men. J Clin Endocrinol Metab 2024:dgae280. [PMID: 38652149 DOI: 10.1210/clinem/dgae280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 04/04/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
CONTEXT Genetic variation in sex hormone-binding globulin (SHBG) structure may affect estimates of sex steroid exposure by altering the affinity of the protein for its ligand. Consequently, free hormone calculations assuming constant binding affinity may, for certain genetic variations, lead to incorrect diagnoses if genetic variation is not taken into consideration. OBJECTIVE To investigate the effects of genetic variation in SHBG on calculated and measured serum free testosterone (T) in men. DESIGN, SETTING AND PARTICIPANTS Population-based sibling-pair study in 999 healthy men aged 25 to 45 (mean: 34.5) years. MAIN OUTCOME MEASURES Genotyping using microarray (Illumina®) for SNPs suggested to affect binding affinity and/or concentration of SHBG or T. SHBG concentrations were measured using immunoassay and in a subset (n = 32) by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Total T was measured using LC-MS/MS. Free T was calculated and in a subset (n = 314) measured directly using LC-MS/MS after equilibrium dialysis. RESULTS Allelic frequencies of analyzed SNPs ranged from 0.5% to 58.2%. Compared to wild-type, SHBG concentrations were lower in rs6258 heterozygotes (-24.7%; p < 0.05) and higher in rs6259 heterozygotes, rs727428 homozygotes, and carriers of rs1799941 (+10.8 to 23.1%; all p < 0.05). Total T was higher in rs727428 homozygotes and carriers of rs5934505, rs1799941and rs6259 (+3.9 to 21.4%; all p < 0.05). No clear effects on measured free T were found, except for a trend towards higher values in rs6259 homozygotes, significant for calculated free T (+18.7%; p < 0.05) in the larger global study population. CONCLUSION In these men, analyzed SNPs were relatively prevalent and affected serum concentrations of total T and SHBG but not calculated or measured free T except for a higher trend in rs6259 homozygotes.
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Affiliation(s)
- Joeri Walravens
- Department of Endocrinology, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium
| | - Bas Sleumer
- ICON Bioanalytical Laboratories, Amerikaweg 18, 9407 TK, Assen, The Netherlands
- Department of Analytical Biochemistry University of Groningen, A. Deusinglaan 1, 9700 AV Groningen, The Netherlands
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, EA61, P.O. Box 30.001, 9700 RB Groningen, The Netherlands
| | - Michel J Vos
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, EA61, P.O. Box 30.001, 9700 RB Groningen, The Netherlands
| | - Gido Snaterse
- Department of Endocrinology, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium
| | - Nick Narinx
- Laboratory of Clinical and Experimental Endocrinology, KULeuven, Herestraat 49, 3000 Leuven, Belgium
| | - Leen Antonio
- Laboratory of Clinical and Experimental Endocrinology, KULeuven, Herestraat 49, 3000 Leuven, Belgium
| | - Tim Reyns
- Department of Clinical Chemistry, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium
| | - Tom Fiers
- Department of Clinical Chemistry, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium
| | - Ido P Kema
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, EA61, P.O. Box 30.001, 9700 RB Groningen, The Netherlands
| | - Jean-Marc Kaufman
- Department of Endocrinology, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium
| | - Nico C van de Merbel
- ICON Bioanalytical Laboratories, Amerikaweg 18, 9407 TK, Assen, The Netherlands
- Department of Analytical Biochemistry University of Groningen, A. Deusinglaan 1, 9700 AV Groningen, The Netherlands
| | - Bruno Lapauw
- Department of Endocrinology, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium
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Handelsman DJ, Sartorius G, Desai R, Idan A, Turner L, Savkovic S, Ly LP, Forbes E, Allan CA, McLachlan R, Conway AJ. Sex steroids and androgen biomarkers in the healthy man study: within-person variability and impact of fasting. Eur J Endocrinol 2024; 190:54-61. [PMID: 38141148 DOI: 10.1093/ejendo/lvad178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/20/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
OBJECTIVE Serum testosterone measurements in clinical practice mostly utilize "direct" (non-extraction) immunoassays which have method-specific bias due to steroid cross-reactivity and nonspecific matrix artifacts. Although more accurate, sensitive, and specific liquid chromatography-mass spectrometry (LCMS) dominates in clinical research, the within-person variability of serum testosterone in healthy men using LCMS measurement is not reported. DESIGN Longitudinal multi-sampling observational study of men in excellent health over 3 months. METHODS Elite healthy men (n = 325) over 40 years of age in excellent, asymptomatic health provided 9 blood samples over 3 months with serum testosterone, dihydrotestosterone (DHT), estradiol (E2), and estrone (E1) measured by validated LCMS with conventional biochemical and anthropometric variables. RESULTS Quantitative estimates of within-person variability within day and between day, week, month, and quarter were stable other than an increase due to fasting. The androgen biomarkers most sensitive to age and testosterone among widely used biochemical and anthropometric variables in middle-aged and older men were identified. CONCLUSIONS This study provides estimates of variability in serum testosterone and the best androgen biomarkers that may prove useful for future studies of androgen action in male ageing.
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Affiliation(s)
- David J Handelsman
- ANZAC Research Institute, University of Sydney, Sydney, NSW 2139, Australia
- Andrology Department, Concord Hospital, Sydney, NSW 2139, Australia
| | | | - Reena Desai
- ANZAC Research Institute, University of Sydney, Sydney, NSW 2139, Australia
| | - Amanda Idan
- Andrology Department, Concord Hospital, Sydney, NSW 2139, Australia
| | - Leo Turner
- Andrology Department, Concord Hospital, Sydney, NSW 2139, Australia
| | - Sasha Savkovic
- Andrology Department, Concord Hospital, Sydney, NSW 2139, Australia
| | - Lam P Ly
- Andrology Department, Concord Hospital, Sydney, NSW 2139, Australia
| | - Elise Forbes
- Hudson Institute, Monash University, Melbourne, VIC 3168, Australia
| | - Carolyn A Allan
- Hudson Institute, Monash University, Melbourne, VIC 3168, Australia
| | - Robert McLachlan
- Hudson Institute, Monash University, Melbourne, VIC 3168, Australia
| | - Ann J Conway
- Andrology Department, Concord Hospital, Sydney, NSW 2139, Australia
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Okafor EN, Okonkwo IN, Nubila NI, Ugonabo MC. Need for age-specific prostate-specific antigen reference intervals in a Nigerian population. Niger J Clin Pract 2023; 26:1430-1435. [PMID: 37929517 DOI: 10.4103/njcp.njcp_1643_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Background In Nigeria, the diagnostic value of prostate-specific antigen (PSA) is a matter of debate. PSA levels are known to vary with population, environmental factors, and advancing age. Studies suggest age-specific reference intervals (ASRIs) of PSA value are more accurate than single cut-off PSA value. For ASRIs to be used effectively, reference intervals (RIs) must be fully evaluated. Aim We determine ASRIs in a Nigerian population. Materials and Methods The study was carried out from January 2016 to January 2019 among 660 adult Nigerian men aged 30-86 years old in Enugu State. Participants completed questionnaire demographics and previous screening. Age group was the indicator. Among them, a total 24 (3.6%) were excluded. Data from 636 (96.4%) men were analyzed for ASRIs. Estimation of PSA was done as per the International Federation of Clinical Chemistry Guideline. Spearman correlation was used to identify correlates P values < 0.05 which was considered significant. Results The mean age group was 49.6 ± 10.2 years. ASRIs using 95th percentile, and PSA values in each 10 years groups were 0-1.94 ng/ml (median 0.22), 0-2.52 ng/ml (median 0.42), 0-3.52 ng/ml (median 1.06), 0-4.8 ng/ml (median 2.1), 0-6.95 ng/ml (median 4.1), and 0-5.6 ng/ml (median 2.4), for age groups 30-39, 40-49, 50-59, 60-69, 70-79, and ≥80 years, respectively. There was positive correlation between PSA and age (r = 0.9915, P < 0.0001). Low income and educational background were more prevalent among the study group. Conclusion Our study provided the ASRIs in our environment but higher than single cut-off value. The data recommended PSA values should be characterized by age and ethnicity.
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Affiliation(s)
- Edwin N Okafor
- Department of Medical Laboratory Sciences, University of Nigeria, Enugu Campus, Nigeria
| | - Innocent N Okonkwo
- Department of Medical Laboratory Sciences, University of Nigeria, Enugu Campus, Nigeria
| | - Nkoyo I Nubila
- Department of Pharmacology and Therapeutic, University of Nigeria, Enugu Campus, Nigeria
| | - Martin C Ugonabo
- Department of Chemical Pathology, University of Nigeria Teaching Hospital, Ituku-Ozalla, Enugu, Nigeria
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Meyhöfer S, Chamorro R, Hallschmid M, Spyra D, Klinsmann N, Schultes B, Lehnert H, Meyhöfer SM, Wilms B. Late, but Not Early, Night Sleep Loss Compromises Neuroendocrine Appetite Regulation and the Desire for Food. Nutrients 2023; 15:2035. [PMID: 37432152 DOI: 10.3390/nu15092035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 07/12/2023] Open
Abstract
OBJECTIVE There is evidence that reduced sleep duration increases hunger, appetite, and food intake, leading to metabolic diseases, such as type 2 diabetes and obesity. However, the impact of sleep timing, irrespective of its duration and on the regulation of hunger and appetite, is less clear. We aimed to evaluate the impact of sleep loss during the late vs. early part of the night on the regulation of hunger, appetite, and desire for food. METHODS Fifteen normal-weight ([mean ± SEM] body-mass index: 23.3 ± 0.4 kg/m2) healthy men were studied in a randomized, balanced, crossover design, including two conditions of sleep loss, i.e., 4 h sleep during the first night-half ('late-night sleep loss'), 4 h sleep during the second night-half ('early-night sleep loss'), and a control condition with 8h sleep ('regular sleep'), respectively. Feelings of hunger and appetite were assessed through visual analogue scales, and plasma ghrelin and leptin were measured from blood samples taken before, during, and after night-time sleep. RESULTS Ghrelin and feelings of hunger and appetite, as well as the desire for food, were increased after 'late-night sleep loss', but not 'early-night sleep loss', whereas leptin remained unaffected by the timing of sleep loss. CONCLUSIONS Our data indicate that timing of sleep restriction modulates the effects of acute sleep loss on ghrelin and appetite regulation in healthy men. 'Late-night sleep loss' might be a risk factor for metabolic diseases, such as obesity and type 2 diabetes. Thereby, our findings highlight the metabolic relevance of chronobiological sleep timing.
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Affiliation(s)
- Svenja Meyhöfer
- Institute for Endocrinology and Diabetes, University of Lübeck, 23562 Lübeck, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Department of Internal Medicine 1, Endocrinology & Diabetes, University of Lübeck, 23538 Lübeck, Germany
- Center of Brain, Behavior & Metabolism, University of Lübeck, 23562 Lübeck, Germany
| | - Rodrigo Chamorro
- Institute for Endocrinology and Diabetes, University of Lübeck, 23562 Lübeck, Germany
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago 8380453, Chile
| | - Manfred Hallschmid
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Department of Medical Psychology and Behavioral Neurobiology, University of Tübingen, 72076 Tübingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Centre Munich, University of Tübingen (IDM), 72076 Tübingen, Germany
| | - Denisa Spyra
- Institute for Endocrinology and Diabetes, University of Lübeck, 23562 Lübeck, Germany
| | - Nelli Klinsmann
- Institute for Endocrinology and Diabetes, University of Lübeck, 23562 Lübeck, Germany
| | - Bernd Schultes
- Institute for Endocrinology and Diabetes, University of Lübeck, 23562 Lübeck, Germany
| | - Hendrik Lehnert
- Center of Brain, Behavior & Metabolism, University of Lübeck, 23562 Lübeck, Germany
- University of Salzburg, A-5020 Salzburg, Austria
| | - Sebastian M Meyhöfer
- Institute for Endocrinology and Diabetes, University of Lübeck, 23562 Lübeck, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Center of Brain, Behavior & Metabolism, University of Lübeck, 23562 Lübeck, Germany
| | - Britta Wilms
- Institute for Endocrinology and Diabetes, University of Lübeck, 23562 Lübeck, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Center of Brain, Behavior & Metabolism, University of Lübeck, 23562 Lübeck, Germany
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Bütikofer U, Badertscher R, Blaser-Freiburghaus C, Fuchsmann P, Tena Stern M, Kuert PA, Pimentel G, Burton-Pimentel KJ, Vionnet N, Vergères G. Serum and Urine Metabolites in Healthy Men after Consumption of Acidified Milk and Yogurt. Nutrients 2022; 14. [PMID: 36432479 DOI: 10.3390/nu14224794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
The identification of molecular biomarkers that can be used to quantitatively link dietary intake to phenotypic traits in humans is a key theme in modern nutritional research. Although dairy products (with and without fermentation) represent a major food group, the identification of markers of their intake lags behind that of other food groups. Here, we report the results from an analysis of the metabolites in postprandial serum and urine samples from a randomized crossover study with 14 healthy men who ingested acidified milk, yogurt, and a non-dairy meal. Our study confirms the potential of lactose and its metabolites as markers of lactose-containing dairy foods and the dependence of their combined profiles on the fermentation status of the consumed products. Furthermore, indole-3-lactic acid and 3-phenyllactic acid are two products of fermentation whose postprandial behaviour strongly discriminates yogurt from milk intake. Our study also provides evidence of the ability of milk fermentation to increase the acute delivery of free amino acids to humans. Notably, 3,5-dimethyloctan-2-one also proves to be a specific marker for milk and yogurt consumption, as well as for cheese consumption (previously published data). These molecules deserve future characterisation in human interventional and observational studies.
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Geidl-Flueck B, Hochuli M, Spinas GA, Gerber PA. Do Sugar-Sweetened Beverages Increase Fasting FGF21 Irrespective of the Type of Added Sugar? A Secondary Exploratory Analysis of a Randomized Controlled Trial. Nutrients 2022; 14:nu14194169. [PMID: 36235821 PMCID: PMC9572320 DOI: 10.3390/nu14194169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/16/2022] [Accepted: 10/01/2022] [Indexed: 11/05/2022] Open
Abstract
Human fibroblast growth factor 21 (FGF21) is a multifaceted metabolic regulator considered to control sugar intake and to exert beneficial effects on glucose and lipid metabolism. Elevated serum FGF21 levels are associated with metabolic syndrome, suggesting a state of FGF21 resistance. Further, given the evidence of a hepatic ChREBP and FGF21 signaling axis, it can be assumed that SSBs containing fructose would possibly increase FGF21 concentrations. We investigated the effects of sugar-sweetened beverage (SSB) consumption on fasting FGF21 levels in healthy, lean men, discriminating the effects of glucose, fructose, and their disaccharide sucrose by secondary data analysis from a randomized controlled trial. Seven weeks of daily SSB consumption resulted in increased fasting FGF21 in healthy, lean men, irrespective of the sugar type. Medians of ΔFGF21 between post-SSB intervention values (week 7) and no-intervention period values (IQR) in pg/mL were: glucose 17.4 (0.4–45.8), fructose 22.9 (−8.6–35.1), and sucrose 13.7 (2.2–46.1). In contrast, this change in FGF21 concentration was only 6.3 (−20.1–26.9) pg/mL in the control group. The lack of a fructose-specific effect on FGF21 concentrations is contrary to our assumption. It is concluded that SSB intake may impact FGF21 concentrations and could contribute to the increased FGF21 concentrations observed in subjects suffering from metabolic syndrome that is possibly associated with decreased FGF21 responsiveness.
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Affiliation(s)
- Bettina Geidl-Flueck
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), 8091 Zurich and University of Zurich (UZH), 8006 Zurich, Switzerland
- Correspondence: ; Tel.: +41-44-255-3620
| | - Michel Hochuli
- Department of Diabetes, Endocrinology, Nutritional Medicine and Metabolism, Inselspital, Bern University Hospital and University of Bern, 3010 Bern, Switzerland
| | - Giatgen A. Spinas
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), 8091 Zurich and University of Zurich (UZH), 8006 Zurich, Switzerland
| | - Philipp A. Gerber
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), 8091 Zurich and University of Zurich (UZH), 8006 Zurich, Switzerland
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Liao J, Wang X, Li Z, Ouyang D. Pharmacokinetic Study of Oral 14C-Radiolabeled Hyzetimibe, A New Cholesterol Absorption Inhibitor. Front Pharmacol 2021; 12:665372. [PMID: 34122085 PMCID: PMC8194275 DOI: 10.3389/fphar.2021.665372] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 05/05/2021] [Indexed: 01/01/2023] Open
Abstract
Background and objectives: Hyzetimibe is a candidate drug being investigated as the second-in-class cholesterol absorption inhibitor; it lowers plasma levels of low-density lipoprotein cholesterol (LDL-C) by blocking the Niemann-Pick C1-like 1 protein, a transporter mainly expressed in the intestine that allows dietary cholesterol to enter the body from the intestinal lumen. Previous studies on the metabolism of hyzetimibe in healthy volunteers were not enough to show the biotransformation and excretion pathway; in particular, whether hyzetimibe maintains pharmacological action for duration sufficient to pass through the hepatic-intestinal circulation remains unknown. Furthermore, it remains unclear whether the differences between the chemical structures of ezetimibe and hyzetimibe would result in different pharmacokinetic characteristics. Given that the molecular target is in the intestine and the substantial hepatic-intestinal circulation is a metabolic characteristic of the drug, a study of hyzetimibe as an oral 14C-radiolabeled drug, compared with routinely metabolized drugs, would play an important role in uncovering pharmacokinetic details. Methods: After an overnight fast and before taking medication, six healthy male volunteers swallowed an investigational product suspension containing 20 mg/∼100 μCi of 14C-labeled hyzetimibe as a single dose. Whole-blood, plasma, urine, and fecal samples were collected, and hyzetimibe and its metabolites were measured. Pharmacokinetic variables of hyzetimibe and its metabolites were calculated and statistically analyzed according to obtained concentration data. Safety data were collected throughout the study. Results: The major metabolite detected in plasma was hyzetimibe-glucuronide, which accounted for 97.2% of the total plasma radioactivity. The mean cumulative excretion of total radioactivity of the dose was 16.39% in urine and 76.90% in feces. Unchanged drug and hyzetimibe-glucuronide were identified as the major components in the feces and the urine, respectively. The main metabolic conversions of hyzetimibe were glucuronidation (M1), mono-oxidation (M4), and mono-oxidation with additional sulfonation (M7). Hyzetimibe was considered generally safe and well tolerated. Conclusion: This study of 14C-radiolabeled hyzetimibe provides a full profile of the biotransformation and excretion routes of hyzetimibe to improve the understanding of the pharmacokinetic characteristics of hyzetimibe. The changed hydroxyl group in the hyzetimibe structure made it easier for that drug, compared with ezetimibe, to combine with glucuronic acid and subsequently increased the urinary excretion of hyzetimibe vs. ezetimibe. These differences highlight the need to investigate in more detail the different pharmacokinetic impacts on the efficacy and safety of hyzetimibe and ezetimibe.
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Affiliation(s)
- Jianwei Liao
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China
| | - Xin Wang
- Zhejiang Hisun Pharmaceutical Co., Ltd, Taizhou, China
| | - Zhenyu Li
- Department of Geriatric Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Dongsheng Ouyang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, China.,Institute of Clinical Pharmacology, Central South University, Changsha, China.,Hunan Key Laboratory for Bioanalysis of Complex Matrix Samples, Changsha, China
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Banica T, Verroken C, Reyns T, Mahmoud A, T'Sjoen G, Fiers T, Kaufman JM, Lapauw B. Early Decline of Androgen Levels in Healthy Adult Men: An Effect of Aging Per Se? A Prospective Cohort Study. J Clin Endocrinol Metab 2021; 106:1074-1083. [PMID: 33382411 DOI: 10.1210/clinem/dgaa915] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Indexed: 01/05/2023]
Abstract
CONTEXT Androgen levels have been shown to decline in aging men. However, there is no consensus on the effect of aging, (changes in) body mass index (BMI), lifestyle factors, and intercurrent disease. OBJECTIVE Investigating longitudinal changes in serum androgen levels in healthy men in relation to body composition, lifestyle factors, and intercurrent disease. DESIGN, SETTING, AND PARTICIPANTS Longitudinal, population-based sibling pair study at a university research center. 999 healthy men aged 24 to 46 years of whom 691 were reevaluated after a mean period of 12 years. MAIN OUTCOME MEASURES Serum SHBG, LH, and FSH levels measured using immuno-assays. Testosterone (T), estradiol (E2), dihydro-testosterone (DHT), and androstenedione (Adione) measured using liquid chromatography-tandem mass spectometry, free T calculated (cFT). RESULTS Baseline age was 34 ± 6 years. Mean BMI increased by 1.19 kg/m2, T levels decreased by 14.2% (20.8 nmol/L vs. 17.8 nmol/L), cFT by 19.1% (392 pmol/L vs. 317 pmol/L), DHT by 15.6% (1.5 nmol/L vs.1.3 nmol/L), and Adione by 10.7% (3.7 nmol/L vs. 3.3 nmol/L; all P < 0.001). E2 did not change over time. SHBG increased by 3.0% (39.8 nmol/L vs. 41.0 nmol/L), LH by 5.8% (4.6 U/L vs. 4.9 U/L) and FSH by 14.7% (4.3 U/L vs. 5.1 U/L) (all P < 0.001). For T, cFT, DHT, Adione, and SHBG, these longitudinal changes persisted after adjustment for confounders (all P < 0.001). CONCLUSION Serum androgen levels start declining early during adult life and independently from changes in BMI and other lifestyle factors, suggesting that aging per se leads to an altered sex steroid status. Given the concurrent rise in gonadotropin levels, the decline in androgen status most likely arises from primary decrease in testicular function.
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Affiliation(s)
- Thiberiu Banica
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | | | - Tim Reyns
- Department of Clinical Chemistry, Ghent University Hospital, Ghent, Belgium
| | - Ahmed Mahmoud
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Guy T'Sjoen
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Tom Fiers
- Department of Clinical Chemistry, Ghent University Hospital, Ghent, Belgium
| | - Jean-Marc Kaufman
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
| | - Bruno Lapauw
- Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
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Kostrzewa-Nowak D, Kubaszewska J, Nowakowska A, Nowak R. Effect of Aerobic and Anaerobic Exercise on the Complement System of Proteins in Healthy Young Males. J Clin Med 2020; 9:E2357. [PMID: 32717972 DOI: 10.3390/jcm9082357] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/20/2020] [Accepted: 07/22/2020] [Indexed: 01/05/2023] Open
Abstract
This study was aimed at examining the impact of common types of physical efforts used to determine the aerobic and anaerobic performance of the participants on the complement system in their peripheral blood. Fifty-one physically active young males aged 16 years old (range 15–21 years) were divided into two age groups (younger, 15–17 years old and older, 18–21 years old) and performed two types of intensive efforts: aerobic (endurance; 20-m shuttle run test; Beep) and anaerobic (speed; repeated speed ability test; RSA). Venous blood samples were collected before and after each exercise (5 and 60 min) to profile the complement system components, namely the levels of C2, C3, C3a, iC3b, and C4. The endurance effort caused a decrease in the post-test C3 (p < 0.001 for both age groups) and increase in post-test C3a (p < 0.001 and p < 0.01 for the younger and older group, respectively), recovery iC3b (p < 0.001 and p < 0.05 for younger and older group, respectively), recovery C2 (p < 0.01 for both age groups), and post-test C4 (p < 0.05 and p < 0.01 for the younger and older group, respectively) levels, while the speed effort caused a decrease only in the post-test C2 (p < 0.05 for younger participants) and post-test C4 levels (p < 0.001 and p < 0.01 for the younger and older group, respectively) and an increase in the recovery C3a level (p < 0.05). Our study provides evidence that different types of physical effort promote different immune responses in physically active young men. Aerobic exercise induced the activation of an alternative pathway of the complement system, whilst the anaerobic effort had little influence. A better understanding of the post-exercise immune response provides a framework to prescribe physical activity to achieve different health outcomes.
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Ouchi M, Kitta T, Takahashi Y, Chiba H, Higuchi M, Togo M, Shinohara N. Reliability of manometry for assessing pelvic floor muscle function in healthy men. Neurourol Urodyn 2020; 39:1464-1471. [PMID: 32339324 PMCID: PMC7384036 DOI: 10.1002/nau.24374] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/23/2020] [Accepted: 04/14/2020] [Indexed: 11/08/2022]
Abstract
Objectives To the best of our knowledge, no study has examined the reliability of assessment methods for male pelvic floor muscle (PFM) function. Therefore, this study aimed to clarify the reliability of manometry with an anal sensor (Peritron cat 9300A) to assess PFM function in healthy men. Methods Healthy male subjects (n = 21) without urinary leakage underwent testing to assess PFM function, and intra‐ and interrater reliability tests among examiners were performed. The PFM function included maximal anorectal squeeze pressure, endurance, mean anorectal squeeze pressure, gradient, and area under the curve during PFM voluntary contraction. Results Participants had a median age of 38 years (range 26‐51), and a mean BMI of 23.2 ± 2.0 kg/m2. Satisfactory intra‐ and interrater reliability scores were found for resting pressure, anorectal squeeze pressure, and endurance. The intra‐rater reliability of resting pressure, anorectal squeeze pressure, and endurance were 0.71, 0.89, and 0.75 for examiner 1 and 0.72, 0.89, and 0.87 for examiner 2. The interrater reliability for resting pressure, anorectal squeeze pressure, and endurance were 0.58, 0.93, and 0.61, respectively. Conclusions This is the first prospective study showing the favorable intra‐ and interrater reliability of manometry for PFM function in healthy men. Our findings demonstrated that manometry can provide both reliable and reproducible data regarding PFM function in continent men, suggesting Peritron cat 9300A can be used to evaluate the PFM function in men.
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Affiliation(s)
- Mifuka Ouchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Sapporo, Japan.,Department of Physical Therapy, School of Rehabilitation Sciences, Health Sciences University of Hokkaido, Tobetsu, Japan
| | - Takeya Kitta
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Sapporo, Japan
| | - Yui Takahashi
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Sapporo, Japan
| | - Hiroki Chiba
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Sapporo, Japan
| | - Madoka Higuchi
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Sapporo, Japan
| | - Mio Togo
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Sapporo, Japan
| | - Nobuo Shinohara
- Department of Renal and Genitourinary Surgery, Graduate School of Medical Science, Hokkaido University, Sapporo, Japan
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11
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Thilakarathna SH, Hamad S, Cuncins A, Brown M, Wright AJ. Emulsion Droplet Crystallinity Attenuates Postprandial Plasma Triacylglycerol Responses in Healthy Men: A Randomized Double-Blind Crossover Acute Meal Study. J Nutr 2020; 150:64-72. [PMID: 31495898 DOI: 10.1093/jn/nxz207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/10/2019] [Accepted: 07/29/2019] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND The presence of triacylglycerol (TAG) cystallinity is assumed to influence digestibility and postprandial lipemia (PPL), although studies to date are limited. OBJECTIVE This study aimed to investigate whether the presence of solid fat compared with undercooled liquid oil, specifically, plays a role in determining PPL by comparing emulsion droplets differing only in terms of physical state. METHODS Ten percent palm stearin and 0.4% sorbitan monostearate emulsions were tempered to contain identically sized, charged, and shaped (spherical) undercooled liquid (LE) compared with partially crystalline solid (SE; mean ± SEM: 33.2% ± 0.03% solid fat at 37°C) droplets. Fifteen healthy fasting adult men (mean ± SD age: 27.5 ± 5.7 y; BMI: 24.1 ± 2.5 kg/m2) consumed 500 mL of each emulsion on separate occasions and plasma TAG concentrations, particle size of the plasma chylomicron-rich fraction (CMRF), and fatty acid (FA) composition of the CMRF-TAG were serially determined in a 6-h postprandial randomized double-blind crossover acute meal study. Changes from baseline values were analyzed by repeated-measures ANOVA. RESULTS An earlier (2 compared with 3 h, P < 0.05) significant rise, a 39.9% higher mean postprandial TAG change from baseline (P = 0.08), and higher peak concentration (mean ± SEM: 1.47 ± 0.19 compared with 1.20 ± 0.15 mmol/L, P = 0.04) and iAUC (1.95 ± 0.39 compared with 1.45 ± 0.31 mmol/L × h, P = 0.03) values were observed for LE compared with SE. The compositions of the CMRF-TAG FAs shifted toward those of the ingested palm stearin by 4 h but did not differ between SE and LE (P = 0.90). Nor were there differences in postprandial changes in CMRF particle size (P = 0.79) or nonesterified FAs (P = 0.72) based on lipid physical state. CONCLUSIONS Despite their identical compositions and colloidal properties, differences in lipid absorption were observed between SE and LE in healthy adult men. This is direct evidence that TAG physical state contributes to PPL, with the presence of solid fat having an attenuating influence.This trial was registered at clinicaltrials.gov as NCT03515590.
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Affiliation(s)
- Surangi H Thilakarathna
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Samar Hamad
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Amanda Cuncins
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Melissa Brown
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Amanda J Wright
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
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12
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Brennan JL, Keerati-u-rai M, Yin H, Daoust J, Nonnotte E, Quinquis L, St-Denis T, Bolster DR. Differential Responses of Blood Essential Amino Acid Levels Following Ingestion of High-Quality Plant-Based Protein Blends Compared to Whey Protein-A Double-Blind Randomized, Cross-Over, Clinical Trial. Nutrients 2019; 11:E2987. [PMID: 31817691 PMCID: PMC6950667 DOI: 10.3390/nu11122987] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 11/16/2022] Open
Abstract
This study assessed the bio-equivalence of high-quality, plant-based protein blends versus Whey Protein Isolate (WPI) in healthy, resistance-trained men. The primary endpoint was incremental area under the curve (iAUC) of blood essential Amino Acids (eAAs) 4 hours after consumption of each product. Maximum concentration (Cmax) and time to maximum concentration (Tmax) of blood leucine were secondary outcomes. Subjects (n = 18) consumed three plant-based protein blends and WPI (control). An analysis of Variance model was used to assess for bio-equivalence of total sum of blood eAA concentrations. The total blood eAA iAUC ratios of the three blends were [90% CI]: #1: 0.66 [0.58-0.76]; #2: 0.71 [0.62-0.82]; #3: 0.60 [0.52-0.69], not completely within the pre-defined equivalence range [0.80-1.25], indicative of 30-40% lower iAUC versus WPI. Leucine Cmax of the three blends was not equivalent to WPI, #1: 0.70 [0.67-0.73]; #2: 0.72 [0.68-0.75]; #3: 0.65 [0.62-0.68], indicative of a 28-35% lower response. Leucine Tmax for two blends were similar to WPI (#1: 0.94 [0.73-1.18]; #2: 1.56 [1.28-1.92]; #3: 1.19 [0.95-1.48]). The plant-based protein blends were not bio-equivalent. However, blood leucine kinetic data across the blends approximately doubled from fasting concentrations, whereas blood Tmax data across two blends were similar to WPI. This suggests evidence of rapid hyperleucinemia, which correlates with a protein's anabolic potential.
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Affiliation(s)
| | | | - Huaixia Yin
- Danone North America, Louisville, CO 80027, USA
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13
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Yuan HF, Shangguan HF, Zheng Y, Meng TQ, Xiong CL, Guan HT. Decline in semen concentration of healthy Chinese adults: evidence from 9357 participants from 2010 to 2015. Asian J Androl 2019; 20:379-384. [PMID: 29493550 PMCID: PMC6038153 DOI: 10.4103/aja.aja_80_17] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The present study aims to analyze sperm concentration trends among young and healthy Chinese adults in Wuhan, Central China, from 2010 to 2015. Semen analysis data from 9357 participants were collected and analyzed using a general linear model and the Cochran–Armitage trend test. A significant decline was observed in sperm concentration (β [standard deviation]: −1.53 [0.16]; P < 0.001). In addition, a decline in sperm density was observed by stratifying student versus nonstudent sperm donors and by analyzing the year of birth or birth year cohort of the participants. Furthermore, the percentage of participants with sperm densities of over 40 × 106 ml−1 significantly decreased with year. Notably, a dramatic decline in sperm density was recorded over the first 5 years of study. This research reported a decline in sperm concentration among young adults in Wuhan, Central China, in 2010–2015.
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Affiliation(s)
- Hong-Fang Yuan
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | | | - Yi Zheng
- Department of Venereology, Wuhan Institute of Dermatology and Venereology, Wuhan 430031, China
| | - Tian-Qing Meng
- Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Hubei Province Human Sperm Bank, Wuhan 430030, China
| | - Cheng-Liang Xiong
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Hubei Province Human Sperm Bank, Wuhan 430030, China
| | - Huang-Tao Guan
- Family Planning Research Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Hubei Province Human Sperm Bank, Wuhan 430030, China
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14
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Chadid S, Barber JR, Rohrmann S, Nelson WG, Yager JD, Kanarek NF, Bradwin G, Dobs AS, McGlynn KA, Platz EA. Age-Specific Serum Total and Free Estradiol Concentrations in Healthy Men in US Nationally Representative Samples. J Endocr Soc 2019; 3:1825-1836. [PMID: 31555753 PMCID: PMC6749840 DOI: 10.1210/js.2019-00178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/15/2019] [Indexed: 12/31/2022] Open
Abstract
Purpose To report age-specific serum estradiol concentration in nonsmoking, lean US men without comorbidities. We provide concentrations from 30 and 15 to 20 years ago given previously described declines in serum estradiol in US men over time. Methods We used data from the Third National Health and Nutrition Examination Survey (NHANES III; 1988 to 1991) and continuous NHANES (1999 to 2004). Serum estradiol and SHBG were previously measured by competitive electrochemiluminescence immunoassays. Free estradiol was estimated from estradiol, SHBG, and albumin. By age, we calculated median concentrations overall and for nonsmoking, lean (body mass index <25 kg/m2 and waist <102 cm) men without diabetes, cardiovascular disease, or cancer. Results Overall, respective total estradiol medians for men ages 20 to 39, 40 to 59, and ≥60 years old were 37.0, 33.9, and 33.5 pg/mL in NHANES III and 31.3, 30.5, and 27.0 pg/mL in continuous NHANES. In nonsmoking, lean men without comorbidities, respective total estradiol medians were 32.0, 32.1, and 32.0 pg/mL in NHANES III and 29.1, 22.7, and 26.1 pg/mL in continuous NHANES. Overall, respective free estradiol medians were 0.82, 0.72, and 0.64 pg/mL in NHANES III and 0.67, 0.61, and 0.47 pg/mL in continuous NHANES. In nonsmoking, lean men without comorbidities, respective free estradiol medians were 0.64, 0.67, and 0.62 pg/mL in NHANES III and 0.58, 0.42, and 0.40 pg/mL continuous NHANES. Conclusion We report US nationally representative serum estradiol concentrations in healthy men, which could be used for targeting estradiol during testosterone supplementation and for general good health.
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Affiliation(s)
- Susan Chadid
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - John R Barber
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Sabine Rohrmann
- Division of Chronic Disease Epidemiology, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - William G Nelson
- Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland.,Department of Urology and the James Buchanan Brady Urological Institute, Baltimore, Maryland
| | - James D Yager
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Norma F Kanarek
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Gary Bradwin
- Department of Laboratory Medicine, Harvard Medical School and Children's Hospital, Boston, Massachusetts
| | - Adrian S Dobs
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Katherine A McGlynn
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
| | - Elizabeth A Platz
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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15
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Balashova NV. [Indicators of protein, lipid, carbohydrate, purine metabolism and the level of pituitary hormones in healthy men of 22-55 years old.]. Adv Gerontol 2019; 32:743-747. [PMID: 32145165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The levels of total protein, glucose, cholesterol and its fractions, triglycerides, uric acid, prolactin, thyroid-stimulating hormone (TSH), luteinizing hormone (LH), follicle-stimulating hormone (FSH), growth hormone in the serum, blood pressure (BP), calculated body mass index (BMI) were analyzed in 60 healthy men aged 22-55 years old. To assess the age dynamics of the parameters, groups of young (up to 35 years old) and middle age (over 35 years old) were formed according to the classification adopted at the International Symposium on Age Periodization in 1965. The correlation analysis of the parameters of the biochemical parameters, level pituitary hormones, age, BMI, level of mean blood pressure was made. There are a decrease (p<0,05) of total blood protein level (within the normal range), a tendency to a decrease in prolactin levels (PRL), an increase (p<0,05) of total cholesterol, LDL cholesterol in middle age group compared with the younger group. HDL cholesterol levels did not differ in the groups; this demonstrates the constancy of antiatherogenic protection over many decades. A slight decrease in total protein in the blood and a tendency to a decrease in the level of PRL with increasing age against the background of a negative correlations between the low degree of PRL and age (r=-0,20; p=0,01), total protein and age (r=-0,35; p=0,01) confirm the participation of PRL in protein metabolism, and also indirectly indicate changes in the regulatory effect of dopamine on prolactin synthesis and secretion.
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Affiliation(s)
- N V Balashova
- M.F.Vladimirsky Moscow Regional Clinical and Research Institute, 61/2 Shchepkina str., Moscow 129110, Russian Federation, e-mail:
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16
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Pimentel G, Burton KJ, von Ah U, Bütikofer U, Pralong FP, Vionnet N, Portmann R, Vergères G. Metabolic Footprinting of Fermented Milk Consumption in Serum of Healthy Men. J Nutr 2018; 148:851-860. [PMID: 29788433 PMCID: PMC5991204 DOI: 10.1093/jn/nxy053] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 12/20/2017] [Accepted: 02/26/2018] [Indexed: 12/21/2022] Open
Abstract
Background Fermentation is a widely used method of natural food preservation that has consequences on the nutritional value of the transformed food. Fermented dairy products are increasingly investigated in view of their ability to exert health benefits beyond their nutritional qualities. Objective To explore the mechanisms underpinning the health benefits of fermented dairy intake, the present study followed the effects of milk fermentation, from changes in the product metabolome to consequences on the human serum metabolome after its ingestion. Methods A randomized crossover study design was conducted in 14 healthy men [mean age: 24.6 y; mean body mass index (in kg/m2): 21.8]. At the beginning of each test phase, serum samples were taken 6 h postprandially after the ingestion of 800 g of a nonfermented milk or a probiotic yogurt. During the 2-wk test phases, subjects consumed 400 g of the assigned test product daily (200 g, 2 times/d). Serum samples were taken from fasting participants at the end of each test phase. The serum metabolome was assessed through the use of LC-MS-based untargeted metabolomics. Results Postprandial serum metabolomes after milk or yogurt intake could be differentiated [orthogonal projections to latent structures discriminant analysis (OPLS-DA) Q2 = 0.74]. Yogurt intake was characterized by higher concentrations of 7 free amino acids (including proline, P = 0.03), reduced concentrations of 5 bile acids (including glycocholic acid, P = 0.04), and modulation of 4 indole derivative compounds (including indole lactic acid, P = 0.01). Fasting serum samples after 2 wk of daily intake of milk or yogurt could also be differentiated based on their metabolic profiles (OPLS-DA Q2 = 0.56) and were discussed in light of the postprandial results. Conclusion Metabolic pathways related to amino acids, indole derivatives, and bile acids were modulated in healthy men by the intake of yogurt. Further investigation to explore novel health effects of fermented dairy products is warranted.This trial was registered at clinicaltrials.gov as NCT02230345.
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Affiliation(s)
- Grégory Pimentel
- Federal Department of Economic Affairs, Education and Research (EAER), Agroscope, Bern, Switzerland
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital, Lausanne, Switzerland
| | - Kathryn J Burton
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital, Lausanne, Switzerland
| | - Ueli von Ah
- Federal Department of Economic Affairs, Education and Research (EAER), Agroscope, Bern, Switzerland
| | - Ueli Bütikofer
- Federal Department of Economic Affairs, Education and Research (EAER), Agroscope, Bern, Switzerland
| | - François P Pralong
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital, Lausanne, Switzerland
| | - Nathalie Vionnet
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital, Lausanne, Switzerland
| | - Reto Portmann
- Federal Department of Economic Affairs, Education and Research (EAER), Agroscope, Bern, Switzerland
| | - Guy Vergères
- Federal Department of Economic Affairs, Education and Research (EAER), Agroscope, Bern, Switzerland
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17
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Sousa LE, Figueiredo AA, Netto JMB. Correlation between pelvic floor strength and physical activity level in healthy men. Aging Male 2018; 22:1-5. [PMID: 29560770 DOI: 10.1080/13685538.2018.1453797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/13/2018] [Accepted: 03/14/2018] [Indexed: 02/06/2023] Open
Abstract
The male pelvic floor muscles comprise a pair of compound muscle layers referred to as the levator ani. Studies have shown that pelvic floor muscle strength is affected by physical activity. This study aimed to assess male pelvic floor muscle strength through manometry of the external anal sphincter and evaluation of its association with physical activity level, BMI, and rectal pressure in healthy men. To assess physical activity level over the previous week, we used the International Physical Activity Questionnaire 8 (IPAQ). Pelvic floor muscle strength was assessed via anorectal manometry. The results shows a negative correlation between resting pressure and MET, a positive correlation between rectal pressure and resting and maximum pressure. The novel finding of this study is a negative correlation between walking and pelvic floor strength. This study raises new questions about the understanding of the interaction among physical activity, intraabdominal pressure, and pelvic floor strength in the physiology of continence in men.
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Affiliation(s)
- Luiz Eduardo Sousa
- a Departamento de Ciências Biológicas , Universidade Federal de Ouro Preto , Ouro Preto , Brazil
| | - Andre Avarese Figueiredo
- b Faculdade de Medicina, Núcleo Interdisciplinar de Pesquisas em Urologia NIPU , Universidade Federal de Juiz de Fora , Juiz de Fora , Brazil
| | - José Murillo Bastos Netto
- b Faculdade de Medicina, Núcleo Interdisciplinar de Pesquisas em Urologia NIPU , Universidade Federal de Juiz de Fora , Juiz de Fora , Brazil
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18
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Pantophlet AJ, Wopereis S, Eelderink C, Vonk RJ, Stroeve JH, Bijlsma S, van Stee L, Bobeldijk I, Priebe MG. Metabolic Profiling Reveals Differences in Plasma Concentrations of Arabinose and Xylose after Consumption of Fiber-Rich Pasta and Wheat Bread with Differential Rates of Systemic Appearance of Exogenous Glucose in Healthy Men. J Nutr 2017; 147:152-160. [PMID: 27927976 DOI: 10.3945/jn.116.237404] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/01/2016] [Accepted: 11/01/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The consumption of products rich in cereal fiber and with a low glycemic index is implicated in a lower risk of metabolic diseases. Previously, we showed that the consumption of fiber-rich pasta compared with bread resulted in a lower rate of appearance of exogenous glucose and a lower glucose clearance rate quantified with a dual-isotope technique, which was in accordance with a lower insulin and glucose-dependent insulinotropic polypeptide response. OBJECTIVE To gain more insight into the acute metabolic consequences of the consumption of products resulting in differential glucose kinetics, postprandial metabolic profiles were determined. METHODS In a crossover study, 9 healthy men [mean ± SEM age: 21 ± 0.5 y; mean ± SEM body mass index (kg/m2): 22 ± 0.5] consumed wheat bread (132 g) and fresh pasta (119 g uncooked) enriched with wheat bran (10%) meals. A total of 134 different metabolites in postprandial plasma samples (at -5, 30, 60, 90, 120, and 180 min) were quantified by using a gas chromatography-mass spectrometry-based metabolomics approach (secondary outcomes). Two-factor ANOVA and advanced multivariate statistical analysis (partial least squares) were applied to detect differences between both food products. RESULTS Forty-two different postprandial metabolite profiles were identified, primarily representing pathways related to protein and energy metabolism, which were on average 8% and 7% lower after the men consumed pasta rather than bread, whereas concentrations of arabinose and xylose were 58% and 53% higher, respectively. Arabinose and xylose are derived from arabinoxylans, which are important components of wheat bran. The higher bioavailability of arabinose and xylose after pasta intake coincided with a lower rate of appearance of glucose and amino acids. We speculate that this higher bioavailability is due to higher degradation of arabinoxylans by small intestinal microbiota, facilitated by the higher viscosity of arabinoxylans after pasta intake than after bread intake. CONCLUSION This study suggests that wheat bran, depending on the method of processing, can increase the viscosity of the meal bolus in the small intestine and interfere with macronutrient absorption in healthy men, thereby influencing postprandial glucose and insulin responses. This trial was registered at www.controlled-trials.com as ISRCTN42106325.
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Affiliation(s)
- Andre J Pantophlet
- Department of Pediatrics, Center for Liver, Digestive, and Metabolic Diseases, and
| | - Suzan Wopereis
- Netherlands Organization for Applied Scientific Research (TNO), Food and Nutrition, Zeist, Netherlands
| | - Coby Eelderink
- Center for Medical Biomics, University Medical Center Groningen, University of Groningen, Groningen, Netherlands; and
| | - Roel J Vonk
- Center for Medical Biomics, University Medical Center Groningen, University of Groningen, Groningen, Netherlands; and
| | - Johanna H Stroeve
- Netherlands Organization for Applied Scientific Research (TNO), Food and Nutrition, Zeist, Netherlands
| | - Sabina Bijlsma
- Netherlands Organization for Applied Scientific Research (TNO), Food and Nutrition, Zeist, Netherlands
| | - Leo van Stee
- Netherlands Organization for Applied Scientific Research (TNO), Food and Nutrition, Zeist, Netherlands
| | - Ivana Bobeldijk
- Netherlands Organization for Applied Scientific Research (TNO), Food and Nutrition, Zeist, Netherlands
| | - Marion G Priebe
- Center for Medical Biomics, University Medical Center Groningen, University of Groningen, Groningen, Netherlands; and
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Keller J, Kahlhöfer J, Peter A, Bosy-Westphal A. Effects of Low versus High Glycemic Index Sugar-Sweetened Beverages on Postprandial Vasodilatation and Inactivity-Induced Impairment of Glucose Metabolism in Healthy Men. Nutrients 2016; 8:E802. [PMID: 27973411 DOI: 10.3390/nu8120802] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/01/2016] [Accepted: 12/05/2016] [Indexed: 12/25/2022] Open
Abstract
Intake of sugar-sweetened beverages (SSB) may contribute to cardiovascular risk. The aim of this study was to investigate whether functional sugars with low compared to high glycemic index (GI) have beneficial effects on arterial stiffness during a period of low-physical activity. In a controlled cross-over dietary intervention (55% CHO, 30% fat, 15% protein), 13 healthy men (age: 23.7 ± 2.2 years, body mass index: 23.6 ± 1.9 kg/m2) completed 2 × 1 week of low physical activity following 1 week of normal physical activity (2363 ± 900 vs. 11,375 ± 3124 steps/day). During inactive phases participants consumed either low-GI (isomaltulose) or high-GI SSB (maltodextrin-sucrose), providing 20% of energy requirements. Postprandial vasodilatation (augmentation index, AIx), insulin sensitivity (IS) and Glucagon-like-peptide 1 (GLP-1) responses were measured during a meal test before and after SSB-intervention. Compared to maltodextrin-sucrose-SSB, postprandial vasodilatation was prolonged (AIx after 120 min: 9.9% ± 4.3% vs. 11.4% ± 3.7%, p < 0.05) and GLP-1 secretion was higher with isomaltulose-SSB (total area under the GLP-1 curve (tAUCGLP)-1: 8.0 ± 4.4 vs. 5.4 ± 3.4 pM × 3 h; p < 0.05). One week of low-physical activity led to impaired IS that was attenuated with low-GI SSB consumption, but did not affect arterial stiffness (p > 0.05). Higher postprandial GLP-1 secretion after intake of low compared to high-GI beverages may contribute to improved postprandial vasodilatation. Although one week of low-physical activity led to marked impairment in IS, it had no effect on arterial stiffness in healthy men.
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Stanek A, Sieroń-Stołtny K, Romuk E, Cholewka A, Wielkoszyński T, Cieślar G, Kwiatek S, Sieroń A, Kawczyk-Krupka A. Whole-Body Cryostimulation as an Effective Method of Reducing Oxidative Stress in Healthy Men. ADV CLIN EXP MED 2016; 25:1281-1291. [PMID: 28028984 DOI: 10.17219/acem/65980] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 09/26/2016] [Accepted: 10/18/2016] [Indexed: 11/24/2022]
Abstract
BACKGROUND Whole-body cryostimulation (WBC) is the therapeutic exposure of the total human body (without underwear) to a very low temperature (below -100°C) for 120-180 s. Currently, WBC is used more frequently not only in the treatment of patients suffering from various diseases, but also by healthy people as a wellness method. OBJECTIVES The aim of this research is to evaluate the impact of WBC procedures on oxidative stress parameters in healthy men. MATERIAL AND METHODS The study involved 32 healthy male subjects who were randomly divided into 2 groups: 16 men exposed to WBC procedures with subsequent kinesiotherapy (WBC group) and 16 men exposed only to kinesiotherapy procedures (KT group). Depending on the group, the subjects were exposed to 10 daily WBC procedures lasting 3 min, with a subsequent 60-min of kinesiotherapy, or exclusively to kinesiotherapy. In subjects from both groups, a day before the beginning of a cycle of treatment and a day after its completion, the level of selected indicators of oxidative stress and non-enzymatic antioxidants, as well as the activity of antioxidant enzymes in serum, plasma and erythrocyte lysates were determined. RESULTS In the WBC group subjects, we recorded a statistically significant decrease in the concentrations of most of the parameters of oxidative stress with an accompanying increase in plasma concentrations of non-enzymatic antioxidants (total antioxidant status and uric acid). We recorded no significant changes in the activities of antioxidant enzymes (plasma total superoxide dismutase (SOD) and its isoenzymes SOD-Mn and SOD-ZnCu, erythrocyte catalase, glutathione peroxidase and glutathione reductase). CONCLUSIONS The results we obtained confirmed that WBC decreases oxidative stress in healthy men.
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Affiliation(s)
- Agata Stanek
- Department of Internal Medicine, Angiology and Physical Medicine, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Poland
| | - Karolina Sieroń-Stołtny
- Department of Physical Medicine, Chair of Physiotherapy, School of Health Sciences in Katowice, Medical University of Silesia, Poland
| | - Ewa Romuk
- Department of Biochemistry, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Poland
| | - Armand Cholewka
- Department of Medical Physics, Chelkowski Institute of Physics, University of Silesia, Poland
| | - Tomasz Wielkoszyński
- Department of Biochemistry, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Poland
| | - Grzegorz Cieślar
- Department of Internal Medicine, Angiology and Physical Medicine, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Poland
| | - Sebastian Kwiatek
- Department of Internal Medicine, Angiology and Physical Medicine, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Poland
| | - Aleksander Sieroń
- Department of Internal Medicine, Angiology and Physical Medicine, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Poland
| | - Aleksandra Kawczyk-Krupka
- Department of Internal Medicine, Angiology and Physical Medicine, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Poland
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Tepper S, Dabush Y, Shahar DR, Endevelt R, Geva D, Ish-Shalom S. Vitamin D Status and Quality of Life in Healthy Male High-Tech Employees. Nutrients 2016; 8:E366. [PMID: 27314386 PMCID: PMC4924207 DOI: 10.3390/nu8060366] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/18/2016] [Accepted: 05/30/2016] [Indexed: 11/16/2022] Open
Abstract
While low vitamin D status has been shown to be associated with decreased quality of life in unhealthy populations and women, only limited data are available regarding healthy adult men. Our aim was to evaluate the associations between health-related quality of life (QoL) and vitamin D status in adult men. High-tech employees aged 25-65 year were recruited from an occupational periodic examination clinic at Rambam Health Campus. QoL was assessed using the Centers for Disease Control and Prevention (CDC) Health-related quality of life questionnaire (HRQOL-4). Serum 25-hydroxyvitamin D (25(OH)D) and Body Mass Index (BMI) were measured; further information was collected about physical activity, education, sun exposure, sick-days, and musculoskeletal pain severity (visual analog scale). Three hundred and fifty-eight men were enrolled in the study; mean serum 25(OH)D level was 22.1 ± 7.9 ng/mL (range 4.6-54.5 ng/mL). In a multivariate logistic regression model, 25(OH)D was a significant independent determinant of self-rated health; Odds Ratio (OR) for self-rated health was 0.91 (95% confidence interval (CI) 0.85-0.97, p = 0.004), adjusted for age, BMI, pain severity, physical activity, and sun exposure. Every 1 ng/mL increase of 25(OH)D was associated with 9% reduction in the odds of reporting self-rated health as fair or poor. Poisson regression model demonstrated an association between physically unhealthy days and 25(OH)D levels (rate ratio 0.95, p < 0.001). In conclusion, serum levels of 25(OH)D were associated with self-rated health and with physically unhealthy days of HRQOL in healthy high-tech male workers. Future intervention studies are required to test the impact of vitamin D supplementation on QoL.
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Affiliation(s)
- Sigal Tepper
- The S. Daniel Abraham International Center for Health and Disease, Department of Public Health, Faculty of Health Sciences, Ben-Gurion University, Beer-Sheva 8410501, Israel.
| | - Yael Dabush
- Department of Clinical Nutrition, Rambam Health Care Campus, Haifa 31093, Israel.
| | - Danit R Shahar
- The S. Daniel Abraham International Center for Health and Disease, Department of Public Health, Faculty of Health Sciences, Ben-Gurion University, Beer-Sheva 8410501, Israel.
| | - Ronit Endevelt
- School of Public Health, Haifa University, Mt. Carmel, Haifa 31905, Israel.
| | - Diklah Geva
- The S. Daniel Abraham International Center for Health and Disease, Department of Public Health, Faculty of Health Sciences, Ben-Gurion University, Beer-Sheva 8410501, Israel.
| | - Sofia Ish-Shalom
- Department of Endocrinology & Diabetes, Elisha Medical Center, Haifa 3463626, Israel.
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22
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Arnal PJ, Drogou C, Sauvet F, Regnauld J, Dispersyn G, Faraut B, Millet GY, Leger D, Gomez-Merino D, Chennaoui M. Effect of Sleep Extension on the Subsequent Testosterone, Cortisol and Prolactin Responses to Total Sleep Deprivation and Recovery. J Neuroendocrinol 2016; 28:12346. [PMID: 26647769 DOI: 10.1111/jne.12346] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 11/10/2015] [Accepted: 11/29/2015] [Indexed: 01/24/2023]
Abstract
Total sleep deprivation (TSD) in humans is associated with altered hormonal levels, which may have clinical relevance. Less is known about the effect of an extended sleep period before TSD on these hormonal changes. Fourteen subjects participated in two experimental counterbalanced conditions (randomised cross-over design): extended sleep (21.00-07.00 h time in bed, EXT) and habitual sleep (22.30-07.00 h time in bed, HAB). For each condition, subjects performed two consecutive phases: six nights of either EXT or HAB. These nights were followed by 3 days in the sleep laboratory with blood sampling at 07.00 and 17.00 h at baseline (B-07.00 and B-17.00), after 24 and 34 h of continuous awakening (24 h-CA, 34 h-CA) and after one night of recovery sleep (R-07.00 and R-17.00) to assess testosterone, cortisol, prolactin and catecholamines concentrations. At 24 h of awakening, testosterone, cortisol and prolactin concentrations were significantly lower compared to B-07.00 and recovered basal levels after recovery sleep at R-07.00 (P < 0.001 for all). However, no change was observed at 34 h of awakening compared to B-17.00. No effect of sleep extension was observed on testosterone, cortisol and catecholamines concentrations at 24 and 34 h of awakening. However, prolactin concentration was significantly lower in EXT at B-07.00 and R-07.00 compared to HAB (P < 0.05, P < 0.001, respectively). In conclusion, 24 h of awakening inhibited gonadal and adrenal responses in healthy young subjects and this was not observed at 34 h of awakening. Six nights of sleep extension is not sufficient to limit decreased concentrations of testosterone and cortisol at 24 h of awakening but may have an impact on prolactin concentration.
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Affiliation(s)
- P J Arnal
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
- Laboratoire de Physiologie de l'Exercice, Université de Lyon, Saint Etienne, France
| | - C Drogou
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - F Sauvet
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - J Regnauld
- Ecole du Val de Grâce, Faculté de médecine Pierre et Marie Curie (UPMC), Sorbonne Université, Paris, France
| | - G Dispersyn
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - B Faraut
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
- Sorbonne Paris Cité, APHP, Hôtel Dieu, Centre du Sommeil et de la Vigilance, Université Paris Descartes, Paris, France
| | - G Y Millet
- Laboratoire de Physiologie de l'Exercice, Université de Lyon, Saint Etienne, France
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - D Leger
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
- Sorbonne Paris Cité, APHP, Hôtel Dieu, Centre du Sommeil et de la Vigilance, Université Paris Descartes, Paris, France
| | - D Gomez-Merino
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - M Chennaoui
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
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Chennaoui M, Drogou C, Sauvet F, Gomez-Merino D, Scofield DE, Nindl BC. Effect of acute sleep deprivation and recovery on Insulin-like Growth Factor-I responses and inflammatory gene expression in healthy men. Eur Cytokine Netw 2014; 25:52-7. [PMID: 25373853 DOI: 10.1684/ecn.2014.0356] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Acute sleep deprivation in humans has been found to increase inflammatory markers and signaling pathways in the periphery through a possible Toll-like receptor 4 (TLR-4). In addition, short duration sleep has been associated with low circulating total Insulin-like Growth Factor-I (IGF-I) concentrations. We aimed to determine whether a total sleep deprivation (TSD) protocol with recovery altered whole-blood gene expression of the proinflammatory cytokines TNF-α and IL-6, as well as TLR-4 expression, and to examine the relationship with circulating concentrations of the IGF-I system. Twelve healthy men participated in a five-day TSD (two control nights followed by one night of sleep deprivation and one night of recovery). Blood was sampled at 0800, before and after sleep deprivation (D2 and D4), and after recovery (D5). It is shown that 25 h of sleep deprivation (D4) induced significant increases in mRNA levels of TNF-α and its soluble receptor R1 (P<0.01 respectively), as well as TLR-4 (P<0.05), while IL-6 mRNA levels remained unchanged. Circulating concentrations of free IGF-I were decreased at D4 (P<0.001). One night of recovery was sufficient to restore basal expression levels for TNF-α, sTNF-R1, TLR-4 and circulating IGF-I. Changes in TLR-4 mRNA levels during the protocol correlated positively with those of TNF-α and sTNF-R1 (r=0.393 and r=0.490 respectively), and negatively with circulating free IGF-I (r=-0.494). In conclusion, 25 h of sleep deprivation in healthy subjects is sufficient to induce transient and reversible genomic expression of the pro-inflammatory cytokine TNF-α and its R1 receptor, and its mediator TLR-4, with a possible link to IGF-I axis inhibition.
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Wijlens AGM, Erkner A, Mars M, de Graaf C. Longer oral exposure with modified sham feeding does not slow down gastric emptying of low- and high-energy-dense gastric loads in healthy young men. J Nutr 2015; 145:365-71. [PMID: 25644360 DOI: 10.3945/jn.114.200584] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND A long oral exposure to food and a high-energy density of food have been shown to increase satiety feelings. The effect of energy density is predominantly caused by an inhibition of gastric emptying. It is hypothesized that prolonging oral exposure may have an additional effect on this inhibition of gastric emptying. However, little human data are available to support this hypothesis. OBJECTIVE The objective was to assess the effect of the duration of oral exposure to food on gastric emptying rate of gastric loads (GLs) low and high in energy density and on satiety feelings. METHODS Twenty-six healthy men [mean ± SD age: 22 ± 3 y; BMI (in kg/m(2)): 23 ± 1] participated in a randomized crossover trial with 4 treatments and a control. Treatments consisted of either 1- or 8-min modified sham feeding (MSF) of cake, and a GL of either 100 or 700 kcal infused in the stomach via a nasogastric tube (500 mL, 62.5 mL/min). The control consisted of no MSF and a GL of 500 mL of water. Gastric emptying rate was assessed with a (13)C breath test. Breath samples and satiety feelings were collected at fixed time points until 90 min after start of the treatment. RESULTS Gastric emptying rate and satiety feelings were not affected by duration of MSF (P ≥ 0.27). However, the 700-kcal GL treatments slowed gastric emptying [41% lower area under the curve (AUC)] and increased satiety feelings (22-31% higher AUC) compared with the 100-kcal GL treatments (P < 0.001). No interaction between MSF duration and energy density of GL was found (P ≥ 0.44). CONCLUSIONS Higher gastric energy density inhibited gastric emptying and increased satiety feelings in healthy young men. However, prolonging oral exposure to food did not have an additional effect. This study provides more insight in satiety regulation. This trial was registered at trialregister.nl as NTR3601.
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Affiliation(s)
- Anne G M Wijlens
- Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands; and
| | - Alfrun Erkner
- Nestec Ltd, Nestlé Research Centre, Lausanne, Switzerland
| | - Monica Mars
- Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands; and
| | - Cees de Graaf
- Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands; and
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Gupta A, Gupta D, Raizada A, Gupta NP, Yadav R, Vinayak K, Tewari V. A hospital based study on reference range of serum prostate specific antigen levels. Indian J Med Res 2014; 140:507-12. [PMID: 25488444 PMCID: PMC4277136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND & OBJECTIVES Serum prostate specific antigen (PSA) levels are known to vary with race and ethnicity, environmental factors, lifestyle, metabolic and physiologic changes and advancing age. This study was designed to determine age specific serum PSA level in healthy Indian men and its comparison with that reported in different populations of the world. METHODS A total of 1300 adult men who attended Executive Health Check-up programme in a tertiary care hospital in Haryana, India, were included in the study. Forty seven men were excluded from the analysis because of urological conditions affecting PSA values. Overall, 1253 men were analyzed for age specific PSA values. RESULTS The age specific reference range of serum PSA values was 0.71 ng/ml in those younger than 40 yr; 0.85 ng/ml in 40-49 yr; 1.13 ng/ml in 50-59 yr group; 1.45 ng/ml in 60-69 yr group; 1.84 ng/ml in 70-79 yr group and 2.35 ng/ml in men older than 80 yr. INTERPRETATION & CONCLUSIONS Our study provided the age-specific reference range of serum PSA in healthy men in India. The data suggested that the PSA levels were associated with increasing age.
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Affiliation(s)
- Aditi Gupta
- Department of Clinical Laboratory, Medanta-The Medicity, Gurgaon, India,Reprint requests: Dr Aditi Gupta, Clinical Lab Services, Medanta-The Medicity, Sector 38, Gurgaon 122 001, India e-mail:
| | - Deepa Gupta
- Department of Clinical Laboratory, Medanta-The Medicity, Gurgaon, India
| | - Arun Raizada
- Department of Clinical Laboratory, Medanta-The Medicity, Gurgaon, India
| | | | - Rajiv Yadav
- Department of Urology, Medanta-The Medicity, Gurgaon, India
| | - Kamini Vinayak
- Department of Clinical Laboratory, Medanta-The Medicity, Gurgaon, India
| | - Vijay Tewari
- Department of Clinical Laboratory, Medanta-The Medicity, Gurgaon, India
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Pons-Rejraji H, Brugnon F, Sion B, Maqdasy S, Gouby G, Pereira B, Marceau G, Gremeau AS, Drevet J, Grizard G, Janny L, Tauveron I. Evaluation of atorvastatin efficacy and toxicity on spermatozoa, accessory glands and gonadal hormones of healthy men: a pilot prospective clinical trial. Reprod Biol Endocrinol 2014; 12:65. [PMID: 25016482 PMCID: PMC4114109 DOI: 10.1186/1477-7827-12-65] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/07/2014] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Recommendations for cardiovascular disease prevention advocate lowering both cholesterol and low-density lipoprotein cholesterol systemic levels, notably by statin intake. However, statins are the subject of questions concerning their impact on male fertility. This study aimed to evaluate, by a prospective pilot assay, the efficacy and the toxicity of a decrease of cholesterol blood levels, induced by atorvastatin on semen quality and sexual hormone levels of healthy, normocholesterolaemic and normozoospermic men. METHODS Atorvastatin (10 mg daily) was administrated orally during 5 months to 17 men with normal plasma lipid and standard semen parameters. Spermatozoa parameters, accessory gland markers, semen lipid levels and blood levels of gonadal hormones were assayed before statin intake, during the treatment, and 3 months after its withdrawal. RESULTS Atorvastatin treatment significantly decreased circulating low-density lipoprotein cholesterol (LDL-C) and total cholesterol concentrations by 42% and 24% (p<0.0001) respectively, and reached the efficacy objective of the protocol. During atorvastatin therapy and/or 3 months after its withdrawal numerous semen parameters were significantly modified, such as total number of spermatozoa (-31%, p<0.05), vitality (-9.5%, p<0.05), total motility (+7.5%, p<0.05), morphology (head, neck and midpiece abnormalities, p<0.05), and the kinetics of acrosome reaction (p<0.05). Seminal concentrations of acid phosphatases (p<0.01), α-glucosidase (p<0.05) and L-carnitine (p<0.05) were also decreased during the therapy, indicating an alteration of prostatic and epididymal functions. Moreover, we measured at least one altered semen parameter in 35% of the subjects during atorvastatin treatment, and in 65% of the subjects after withdrawal, which led us to consider that atorvastatin is unsafe in the context of our study. CONCLUSIONS Our results show for the first time that atorvastatin significantly affects the sperm parameters and the seminal fluid composition of healthy men.
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Affiliation(s)
- Hanae Pons-Rejraji
- CHU Clermont Ferrand, Laboratoire de BDR: AMP-CECOS, F-63003 Clermont-Ferrand, France
- GReD, UMR CNRS 6293 INSERM U1103, Clermont Université, 63000 Clermont-Ferrand, France
| | - Florence Brugnon
- CHU Clermont Ferrand, Laboratoire de BDR: AMP-CECOS, F-63003 Clermont-Ferrand, France
- GReD, UMR CNRS 6293 INSERM U1103, Clermont Université, 63000 Clermont-Ferrand, France
| | - Benoit Sion
- Pharmacologie Fondamentale et Clinique de la Douleur, France Inserm, U 1107, Neuro-Dol, Clermont Université, Université d’Auvergne, F-63001 Clermont-Ferrand, France
| | - Salwan Maqdasy
- GReD, UMR CNRS 6293 INSERM U1103, Clermont Université, 63000 Clermont-Ferrand, France
- CHU Clermont-Ferrand, Service d’Endocrinologie-Diabétologie, F-63003 Clermont-Ferrand, France
| | - Gerald Gouby
- CHU de Clermont-Ferrand, Délégation à la Recherche Clinique et à l’Innovation (DRCI), F-63003 Clermont-Ferrand, France
| | - Bruno Pereira
- CHU Clermont-Ferrand, Biostatistics unit, DRCI, Clermont-Ferrand, France
| | - Geoffroy Marceau
- GReD, UMR CNRS 6293 INSERM U1103, Clermont Université, 63000 Clermont-Ferrand, France
- CHU Clermont-Ferrand, Laboratoire de Biochimie, F-63003 Clermont-Ferrand, France
| | - Anne-Sophie Gremeau
- CHU Clermont Ferrand, Laboratoire de BDR: AMP-CECOS, F-63003 Clermont-Ferrand, France
| | - Joel Drevet
- GReD, UMR CNRS 6293 INSERM U1103, Clermont Université, 63000 Clermont-Ferrand, France
- Pharmacologie Fondamentale et Clinique de la Douleur, France Inserm, U 1107, Neuro-Dol, Clermont Université, Université d’Auvergne, F-63001 Clermont-Ferrand, France
| | - Genevieve Grizard
- CHU Clermont Ferrand, Laboratoire de BDR: AMP-CECOS, F-63003 Clermont-Ferrand, France
| | - Laurent Janny
- CHU Clermont Ferrand, Laboratoire de BDR: AMP-CECOS, F-63003 Clermont-Ferrand, France
- GReD, UMR CNRS 6293 INSERM U1103, Clermont Université, 63000 Clermont-Ferrand, France
| | - Igor Tauveron
- GReD, UMR CNRS 6293 INSERM U1103, Clermont Université, 63000 Clermont-Ferrand, France
- CHU Clermont-Ferrand, Service d’Endocrinologie-Diabétologie, F-63003 Clermont-Ferrand, France
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