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Disorders of the Male Reproductive System01:20

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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.
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Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Stem Cells in Male Sexual Dysfunction: Are We Getting Somewhere?

Mohammad Ayodhia Soebadi1, Uros Milenkovic2, Emmanuel Weyne2

  • 1Laboratory of Experimental Urology, Department of Development and Regeneration, KU Leuven, Leuven, Belgium; Department of Urology, Airlangga University School of Medicine, Dr Soetomo General Hospital, Surabaya, Indonesia.

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Summary

Stem cell therapy shows promise for treating erectile dysfunction (ED) and Peyronie disease (PD). Early clinical trials indicate safety, with preclinical studies confirming functional benefits, suggesting a new regenerative approach.

Keywords:
Cavernous Nerve InjuryErectile DysfunctionPeyronie DiseaseProgenitor CellsSexual DysfunctionStem Cells

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Area of Science:

  • Regenerative Medicine
  • Urology
  • Stem Cell Biology

Background:

  • Stem cell therapy is emerging as a treatment for male sexual disorders, specifically erectile dysfunction (ED) and Peyronie disease (PD).
  • Regenerative therapy using stem cells offers a potential curative approach, unlike current pharmaceutical options.

Purpose of the Study:

  • To review preclinical research and recent clinical trials on the use of stem cells for ED and PD.
  • To critically evaluate the efficacy and safety of stem cell administration in animal models and human subjects.

Main Methods:

  • A literature search was conducted using PubMed with keywords: stem cells, cellular therapy, erectile dysfunction, Peyronie's disease, and clinical trial.
  • A non-systematic narrative review and critical reflection of preclinical and clinical studies were performed.

Main Results:

  • Preclinical studies consistently demonstrate functional improvements in animal models of ED and PD following stem cell injection.
  • Various stem cell types have been utilized, with results suggesting a predominant paracrine effect rather than engraftment and differentiation.
  • Phase 1 clinical trials in animals have shown no severe adverse events, but human efficacy remains to be determined.

Conclusions:

  • Stem cells exhibit established efficacy in preclinical research and early-phase clinical trials for male sexual dysfunction.
  • Current studies highlight the safety of intrapenile injections of autologous bone marrow- and adipose tissue-derived stem cells.