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Related Concept Videos

Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Nitric Oxide Signaling Pathway01:28

Nitric Oxide Signaling Pathway

Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure to...
Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors01:28

Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors

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TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
T Cell Types and Functions01:24

T Cell Types and Functions

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Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

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Related Experiment Videos

Emerging role for TNF-α in erectile dysfunction.

Fernando S Carneiro1, Robert Clinton Webb, Rita C Tostes

  • 1Department of Physiology, Medical College of Georgia, Augusta, GA, USA. fcarneiro@mcg.edu

The Journal of Sexual Medicine
|March 30, 2010
PubMed
Summary
This summary is machine-generated.

Tumor necrosis factor-alpha (TNF-α) plays a role in cardiovascular diseases (CVD) and erectile dysfunction (ED). Elevated TNF-α levels in ED patients suggest its involvement in the pathophysiology linking ED and CVD.

Related Experiment Videos

Area of Science:

  • Cardiovascular Science
  • Urology
  • Immunology

Background:

  • Cytokines influence erectile dysfunction (ED) pathophysiology, affecting vascular function.
  • Penile tissue acts as an early indicator for atherosclerosis, linked to cardiovascular diseases (CVD).

Purpose of the Study:

  • To review literature on the role of tumor necrosis factor-alpha (TNF-α) in ED.

Main Methods:

  • PubMed search for publications on cytokines, specifically TNF-α, in CVD and ED.
  • Review of clinical and experimental evidence.

Main Results:

  • TNF-α significantly impacts CVD through vascular effects.
  • Higher TNF-α levels are observed in patients with ED.
  • TNF-α's vascular actions suggest its role in ED pathophysiology, especially with CVD.

Conclusions:

  • ED involves systemic arterial defects, not just penile vasculature.
  • TNF-α implicates ED pathophysiology, providing a link between CVD and ED.