Sexual functional deficiency affects largely the physical conditions, life and sexual quality of the patients. Hypogonadism affects about 4 to 5 million men in the US, and the incidence increases with age. In our recent phase I clinical trial, we have shown that intravenous adipose - derived MSC administration was safe in female and male patients with hormone deficiency. Post-transplantation sexual satisfaction was observed in all patients enrolled in this study. Testosterone levels in males increased significantly after transplantation and were maintained at high levels for up to 6 months before decreasing again at the 12-month follow-up. The aim of this clinical trial was to assess the safety and effectiveness of allogeneic administration of MSCs in middle-aged people with sexual functional deficiency.

Sexual functional deficiency occurs at some point in life and becomes a problematic issue in middle-aged adulthood. Regenerative medicine, especially mesenchymal stem cell (MSC) transplantation, has developed extensively, with preclinical and clinical trials emphasizing the benefits of stem cell therapy for restoration of sexual deficiency. n our recent phase I clinical trial, we have shown that intravenous adipose - derived MSC administration was safe in female and male patients with hormone deficiency. Post-transplantation sexual satisfaction was observed in all patients enrolled in this study. Testosterone levels in males increased significantly after transplantation and were maintained at high levels for up to 6 months before decreasing again at the 12-month follow-up. The aim of this clinical trial was to assess the safety and effectiveness of allogeneic administration of MSCs in middle-aged people with sexual functional deficiency. In phase II, 40 males with hormone deficiency will be recruited and divided randomly into two groups (n=23 each). The group A will receive UC-MSCs intravenously at day 0 and day 90 ± 7, while the group B will be infused with UC-MSCs at day 180 ± 14 and day 270 ± 14. Each group will be monitored for 365 ± 14 days after the first infusion. The phase II is to investigate safety and efficacy of UC-MSC infusion for the treatment of sexual hormone deficiency in males.

The primary outcome are: (1) numbers of AEs or SAEs during UC-MSC infusion and 365 ± 14 days after the first infusion; (2) Testosterone levels and sexual life quality through quantification of Aging Men Symptom (AMS), International Index of Erectile Function (IIEF), and Sexual Quality of Life Questionnaire (SQoL-M) at day 90 ± 7 and day 180 ± 14 of the group A compared to those of the group B.

The secondary outcome are: (1) Testosterone levels and (2) sexual life quality through quantification of AMS, IIEF, and SQoL-M at day 90 ± 7, day 180 ± 14, and day 365 ± 14 after the first UC-MSC infusion of each group compared to the baseline; (3) cytokine concentration (TNFa, IFN-γ, IL1, IL-6, IL-8, IL-4, IL-10, IDO) in serum of the participants and their T cell immunophenotype at day 90 ± 7, day 180 ± 14, and day 365 ± 14 after the first UC-MSC infusion.

Inclusion Criteria:

• Males with sexual hormone deficiency aged 50 to 70 years
• AMS score ≥ 27
• IIEF < 14
• SQoL-M ≤ 87
• and Testosterone ≤ 12 nMol/L
• Normal liver function (ALT, AST and Bilirubin are normal according to biological index of Vietnamese people).
• Normal kidney function is usually according to the biological index of Vietnamese people.
• No infection, HIV, HBV, active syphilis.
• Must provide written informed consent.

Exclusion Criteria:

• The patient had surgery to remove the gonads.
• Patients with a history of cancer, or undergoing cancer treatment, or are positive for cancer screening tests including: PSA, AFP, Pepsinogen I, Pepsinogen II and erythrocyte smear test.

The patient is taking anti-rejection drugs.

• Patients with malformations, malformations or tumors of the endocrine glands.
• Endocrine impairment due to diabetes (HBA1c > 7) and other metabolic diseases.
• Patients with active autoimmune disease or positive for antinuclear antibodies.
• Patients with severe heart failure, severe renal failure, severe liver failure, severe respiratory failure, history of cerebral infarction, myocardial infarction, Alzeimer.
• Patients with hypothyroidism.
• The patient has an acute infection.
• Patients with clinically significant coagulopathy or other hematological diseases.
• History of allergy to anesthetics, anesthetics, antibiotics.
• Patients who are using other hormone-improving drugs or supplements (including Sildenafil) in the last 2 weeks or want to continue using these drugs during the study period.
• The patient is a smoker.

males with sexual hormone deficiency