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Testicular volume and clinical correlates of hypothalamic-pituitary-testicular function: A cross-sectional study in obese men.

ABSTRACT: The aim of this study was to determine whether testicular volume is correlated with clinical and biochemical markers of hypothalamic-pituitary-testicular (HPT) axis function. This was a cross-sectional substudy of a larger randomized controlled trial including obese men, body mass index (BMI) ?30 kg m-2, with a total testosterone level <12 nmol l-1. Testicular volume was measured by orchidometer, testosterone by liquid chromatography/tandem mass spectrometry, and body composition by dual-energy X-ray absorptiometry. Men completed the Aging Males' Symptoms (AMS) score, International Index of Erectile Function-5 (IIEF-5), physical function, and handgrip dynamometer testing. Eighty-nine men participated with a median (interquartile range [IQR]) age of 53.1 (47.6, 59.2) years, BMI of 37.0 (34.6, 40.5) kg m-2, and a total testosterone of 7.0 (6.1, 7.9) nmol l-1. Median testicular volume was 18 (IQR: 10, 20) ml. Testicular volume was negatively correlated with BMI (? = -0.1952, P = 0.010) and total fat mass (? = -0.2115, P = 0.005) independent of age and testosterone. When BMI, testosterone, sex hormone-binding globulin (SHBG), and luteinizing hormone (LH) were present in a multivariable model, only BMI (-0.38 ml change in testicular volume per 1 kg m-2BMI; 95% CI: -0.74, -0.02; P = 0.04) and LH (-0.92 ml change in testicular volume per 1 IU l-1 LH; 95% CI: -1.75, -0.095; P = 0.03) remained independent significant predictors of testicular volume. Testicular volume was positively correlated with IIEF-5 (? = 0.2092, P = 0.021), but not related to handgrip strength, physical function tests, or AMS. In obese men, testicular volume is inversely and independently associated with measures of adiposity, but not with most clinical or biochemical markers of HPT axis action. From a clinical perspective, this suggests that obesity might compromise the reliability of reduced testicular volume as a sign of androgen deficiency in men.

SUBMITTER: Tang Fui MN

PROVIDER: S-EPMC7406092 | biostudies-literature | 2020 Jul-Aug

REPOSITORIES: biostudies-literature

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Testicular volume and clinical correlates of hypothalamic-pituitary-testicular function: A cross-sectional study in obese men.

Tang Fui Mark Ng MN Hoermann Rudolf R Wittert Gary G Grossmann Mathis M

Asian journal of andrology 20200701 4

The aim of this study was to determine whether testicular volume is correlated with clinical and biochemical markers of hypothalamic-pituitary-testicular (HPT) axis function. This was a cross-sectional substudy of a larger randomized controlled trial including obese men, body mass index (BMI) ≥30 kg m<sup>-2</sup>, with a total testosterone level <12 nmol l<sup>-1</sup>. Testicular volume was measured by orchidometer, testosterone by liquid chromatography/tandem mass spectrometry, and body compo ...[more]

PMID: 31535628

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Project description:Diets could play an important role in testicular function, but studies on how adherence to the dietary patterns influences human testicular function in Asian countries are scarce. Herein, we examined the association between testosterone-related dietary patterns and testicular function among adult men in Taiwan. This cross-sectional study recruited 3283 men who attended a private medical screening program from 2009 to 2015. Testosterone-related dietary pattern was generated by the reduced rank regression (RRR) method. The association between adherence to quartile of dietary pattern scores with sex hormones (testosterone, follicle-stimulating hormone (FSH), luteinizing hormone (LH), and estradiol (E2)) and sperm quality (sperm concentration (SC), total sperm motility (TSM), progressive motility (PRM), and normal sperm morphology (NSM)) were examined by multivariable linear regression. Hemoglobin (β = 0.57, p < 0.001), hematocrit (β = 0.17, p = 0.002), triglyceride (β = -0.84, p < 0.001), HDL-cholesterol (β = 3.58, p < 0.001), total cholesterol to HDL-cholesterol ratio (β = -0.78, p < 0.001), and uric acid (β = -10.77, p < 0.001) were highly correlated with testosterone levels. Therefore, these biomarkers were used to construct a testosterone-related dietary pattern. Highest adherence (Q4) to dietary pattern scores were negatively associated with lower testosterone in the pooled analysis (β = -0.89, p = 0.037) and normal-weight men (β = -1.48, p = 0.019). Likewise, men in the Q4 of the dietary pattern had lower SC (β = -5.55, p = 0.001) and NSM (β = -2.22, p = 0.007) regardless of their nutritional status. Our study suggesting that testosterone-related dietary pattern (rich in preserved vegetables or processed meat or fish, deep-fried foods, innards organs, rice or flour products cooked in oil, and dipping sauce, but low in milk, dairy products, legumes, or beans, and dark or leafy vegetables) was associated with a poor testicular function.

Dataset Information

Testicular volume and clinical correlates of hypothalamic-pituitary-testicular function: A cross-sectional study in obese men.

Publications

Testicular volume and clinical correlates of hypothalamic-pituitary-testicular function: A cross-sectional study in obese men.

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