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Molecular Research of Male Hormones

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Biology".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 2045

Special Issue Editor


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Guest Editor
1. Division of Internal Medicine and Endocrinology, Madonna delle Grazie Hospital, 00049 Rome, Italy
2. GCS Point Medical Center, 0010 Rome, Italy
Interests: andrology; thyroid hormone; endothelium; regenerative medicine
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Special Issue Information

Dear Colleagues, 

During the last several decades male sexual function has been rapidly decreasing in terms of both steroidogenesis and spermatogenesis. Due to changes of lifestyle and increased pollution, every year more men suffer from hypogonadism and infertility.

The complex process of reproduction is finely regulated by various factors, including autocrine, paracrine, juxtracrine and endocrine environments within the gonads. All these processes are inter-connected to each other, and the major role is performed by the sex hormones.

Testes perform two important roles in one unit: they produce testosterone (steroidogenesis) and maintain germ cell development. Sertoli cells play the key role in terms of male fertility regulating hormones and producing signaling molecules, including growth factors and inflammatory cytokines which are involved in and sustain the process of spermatogenesis.

The aim of this Special Issue is to identify new pathways involved in the mechanisms of both steroidogenesis and spermatogenesis in order to maintain sexual function, and to prevent and cure infertility and hypogonadism.

In this Special Issue, we encourage authors to submit original research papers or review articles focused on the following topics:

  • Endocrine function of the testis;
  • Hormones and fertility;
  • Male hypogonadism;
  • Signaling molecules and spermatogenesis;
  • Endocrine disruptors and testicular function;
  • Androgens and molecular pathways.

Prof. Dr. Davide Francomano
Guest Editor

Manuscript Submission Information

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Keywords

  • male hormones
  • male sexual function
  • testosterone
  • endocrine function of the testis
  • hormones
  • fertility

Published Papers (1 paper)

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16 pages, 2368 KiB  
Article
Plasma Metabonomics in Insulin-Resistant Hypogonadic Patients Induced by Testosterone Treatment
by Lello Zolla, Giuseppe Grande and Domenico Milardi
Int. J. Mol. Sci. 2022, 23(14), 7754; https://doi.org/10.3390/ijms23147754 - 14 Jul 2022
Cited by 5 | Viewed by 1668
Abstract
Hypogonadic subjects with insulin resistance (IR) showed different metabonomic profiles compared to normo-insulinemic subjects (IS). Testosterone replacement therapy (TRT) may have a different impact on the metabolisms of those with the presence or absence of insulin resistance. We evaluated the changes in the [...] Read more.
Hypogonadic subjects with insulin resistance (IR) showed different metabonomic profiles compared to normo-insulinemic subjects (IS). Testosterone replacement therapy (TRT) may have a different impact on the metabolisms of those with the presence or absence of insulin resistance. We evaluated the changes in the metabolism of IR hypogonadic patients before and after 60 days of TRT. The metabonomic plasma profiles from 20 IR hypogonadal patients were recorded using ultra-high-performance liquid chromatography (UHPLC) and high-resolution mass spectrometry (HRMS). Plasma metabolites, before and after 60 days of TRT, were compared. In hypogonadic patients, carnosine, which is important for improving performance during exercise, increased. Conversely, proline and lysine—amino acids involved in the synthesis of collagen—reduced. Triglycerides decreased and fatty acids (FFAs) increased in the blood as a consequence of reduced FFA β-oxidation. Glycolysis slightly improved, while the Krebs cycle was not activated. Gluconeogenesis (which is the main energy source for hypogonadal IR before TRT) stopped after treatment. As a consequence, lactate and acetyl CoA increased significantly. Both lactate and acetyl CoA were metabolized into ketone bodies which increased greatly, also due to leucine/isoleucine degradation. Ketone bodies were derived predominantly from acetyl CoA because the reaction of acetyl CoA into ketone bodies is catalyzed by mtHMGCoA synthase. This enzyme is inhibited by insulin, which is absent in IR patients but overexpressed following testosterone administration. Ketosis is an alternative route for energy supply and provides the same metabolic effects as insulin but at the metabolic or primitive control level, which bypasses the complex signaling pathway of insulin. After treatment, the hypogonadic patients showed clinical symptoms related to ketonuria. They presented similarly to those following a ketogenic diet, the so-called ‘keto flu’. This must be taken into account before the administration of TRT to hypogonadic patients. Full article
(This article belongs to the Special Issue Molecular Research of Male Hormones)
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