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      Premature Ejaculation and Endocrine Disorders: A Literature Review

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          Abstract

          Premature ejaculation (PE) is the most common male sexual dysfunction, with 30% of men experiencing PE worldwide. According to the generally accepted classification, there are two types of PE: lifetime PE and acquired PE. Various biological and psychological causes are known to be involved in the etiology of PE. However, due to the incomplete definition and etiopathogenesis of PE, there is no effective treatment. Although clinical and animal studies indicate that hormones play a role in controlling the ejaculation process, the precise endocrine mechanisms are unclear. In addition, little is known about the role of endocrine disorders in PE etiology. However, there is evidence that diabetes mellitus (DM), obesity, metabolic syndrome (MetS), thyroid gland disorders, pituitary gland disorders, and vitamin D deficiency affect the prevalence of PE. Moreover, it has been reported that the prevalence of PE decreases with treatment of these endocrine disorders. In this review, the relationship between PE and DM, MetS, obesity, vitamin D deficiency, and thyroid and pituitary gland disorders is summarized.

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          Visceral Adiposity Index

          OBJECTIVE To individuate a novel sex-specific index, based on waist circumference, BMI, triglycerides, and HDL cholesterol, indirectly expressing visceral fat function. RESEARCH DESIGN AND METHODS Visceral adiposity index (VAI) was first modeled on 315 nonobese healthy subjects. Using two multiple logistic regression models, VAI was retrospectively validated in 1,498 primary care patients in comparison to classical cardio- and cerebrovascular risk factors. RESULTS All components of metabolic syndrome increased significantly across VAI quintiles. VAI was independently associated with both cardiovascular (odd ratio [OR] 2.45; 95% CI 1.52–3.95; P < 0.001) and cerebrovascular (1.63; 1.06–2.50; P = 0.025) events. VAI also showed significant inverse correlation with insulin sensitivity during euglycemic-hyperinsulinemic clamp in a subgroup of patients (R s = −0.721; P < 0.001). By contrast, no correlations were found for waist circumference and BMI. CONCLUSIONS Our study suggests VAI is a valuable indicator of “visceral adipose function” and insulin sensitivity, and its increase is strongly associated with cardiometabolic risk.
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            Distribution of the vitamin D receptor and 1 alpha-hydroxylase in human brain.

            Despite a growing body of evidence that Vitamin D is involved in mammalian brain functioning, there has been a lack of direct evidence about its role in the human brain. This paper reports, for the first time, the distribution of the 1,25-dihydroxyvitamin D3 receptor (VDR), and 1alpha-hydroxylase (1alpha-OHase), the enzyme responsible for the formation of the active vitamin in the human brain. The receptor and the enzyme were found in both neurons and glial cells in a regional and layer-specific pattern. The VDR was restricted to the nucleus whilst 1alpha-OHase was distributed throughout the cytoplasm. The distribution of the VDR in human brain was strikingly similar to that reported in rodents. Many regions contained equivalent amounts of both the VDR and 1alpha-OHase, however the macrocellular cells within the nucleus basalis of Meynert (NBM) and the Purkinje cells in the cerebellum expressed 1alpha-OHase in the absence of VDR. The strongest immunohistochemical staining for both the receptor and enzyme was in the hypothalamus and in the large (presumably dopaminergic) neurons within the substantia nigra. The observed distribution of the VDR is consistent with the proposal that Vitamin D operates in a similar fashion to the known neurosteroids. The widespread distribution of 1alpha-OHase and the VDR suggests that Vitamin D may have autocrine/paracrine properties in the human brain.
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              Resurrection of vitamin D deficiency and rickets.

              The epidemic scourge of rickets in the 19th century was caused by vitamin D deficiency due to inadequate sun exposure and resulted in growth retardation, muscle weakness, skeletal deformities, hypocalcemia, tetany, and seizures. The encouragement of sensible sun exposure and the fortification of milk with vitamin D resulted in almost complete eradication of the disease. Vitamin D (where D represents D2 or D3) is biologically inert and metabolized in the liver to 25-hydroxyvitamin D [25(OH)D], the major circulating form of vitamin D that is used to determine vitamin D status. 25(OH)D is activated in the kidneys to 1,25-dihydroxyvitamin D [1,25(OH)2D], which regulates calcium, phosphorus, and bone metabolism. Vitamin D deficiency has again become an epidemic in children, and rickets has become a global health issue. In addition to vitamin D deficiency, calcium deficiency and acquired and inherited disorders of vitamin D, calcium, and phosphorus metabolism cause rickets. This review summarizes the role of vitamin D in the prevention of rickets and its importance in the overall health and welfare of infants and children.
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                Author and article information

                Journal
                World J Mens Health
                World J Mens Health
                WJMH
                The World Journal of Men's Health
                Korean Society for Sexual Medicine and Andrology
                2287-4208
                2287-4690
                January 2022
                22 March 2021
                : 40
                : 1
                : 38-51
                Affiliations
                Department of Urology, Acibadem Mehmet Ali Aydinlar University School of Medicine, Istanbul, Turkey.
                Author notes
                Correspondence to: Enis Rauf Coskuner. Department of Urology, Acibadem Bakirkoy Hospital, Acibadem Mehmet Ali Aydinlar University School of Medicine, Halit Ziya Usakligil Cad No:1, Bakirkoy/Istanbul 34140, Turkey. Tel: +90-542-421-55-50, Fax: +90-212-414-51-40, enisraufcoskuner@ 123456hotmail.com
                Author information
                https://orcid.org/0000-0002-1248-5960
                https://orcid.org/0000-0002-6564-0821
                Article
                10.5534/wjmh.200184
                8761237
                33831976
                8b8fb0b1-fd91-49de-9e08-b10e26ff55aa
                Copyright © 2022 Korean Society for Sexual Medicine and Andrology

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 05 November 2020
                : 06 February 2021
                : 09 February 2021
                Categories
                Review Article
                Male Sexual Health and Dysfunction

                diabetes mellitus,hyperthyroidism,metabolic syndrome,premature ejaculation,vitamin d

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