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RA-2 13-cis Retinoic Acid (Isotretinoin)

A Pilot Trial of 13-cis Retinoic Acid (Isotretinoin) for the Treatment of Men With Oligoasthenoteratozoospermia

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02061384
Acronym
RA-2
Enrollment
20
Registered
2014-02-12
Start date
2014-08-31
Completion date
2018-12-31
Last updated
2021-08-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Klinefelter's Syndrome, Male Infertility, Y-chromosome Microdeletions

Keywords

Infertility

Brief summary

Men with infertility and normal hormone levels have few options for fertility treatment. Previous research work has suggested that men with infertility may have low levels of the active form of Vitamin A, called retinoic acid, in their testes. We think that giving men with low sperm counts retinoic acid may increase their sperm counts and improve their chances of fathering a pregnancy. We want to see if retinoic acid administration over twenty weeks can increase sperm production and help infertile men become fathers without the need for In vitro fertilization (IVF) and/or intracytoplasmic sperm injection (ICSI). We also want to see if adding calcitriol with retinoic acid will improve sperm motility in a sub-set of subjects.

Detailed description

This is a 20 week, unblinded, two-arm pilot study to determine the impact of therapy with 13-cis retinoic acid and calcitriol on sperm indices in infertile men. Twenty infertile men, ages 21-60 with abnormal sperm analyses will be enrolled for 20-week and given 20 mg 13-cis retinoic acid, twice daily. Subjects#11-#20 will also be administered calcitriol to see if adding calcitriol with Accutane will improve sperm motility. All subjects will be closely followed for side effects related to treatment. The impact of treatment on indices of spermatogenesis will be determined by monthly seminal fluid analyses.

Interventions

Accutane is used for the treatment of severe acne

DRUGCalcitriol

Calcitriol is a form of vitamin D given twice daily (BID)

Sponsors

University of Washington
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
21 Years to 60 Years
Healthy volunteers
No

Inclusion criteria

* Subjects will be infertile men (no pregnancy with partner with normal cycles and normal hysterosalpingogram despite \>1 year of unprotected intercourse). * Abnormal sperm analyses with a total, motile sperm count of less than 10 million sperm as assessed by semen analysis on two occasions separated by one week. * In the opinion of the investigator, is able to comply with the protocol, understand and sign an informed consent and HIPAA (Health Insurance Portability and Accountability Act ) form.

Exclusion criteria

* Men participating in another clinical trial * Men not living in the catchment area of the clinic * Clinically significant abnormal findings at screening * Known genetic infertility (e.g. Klinefelter syndrome or Y-chromosome microdeletions), * Hypogonadotropic hypogonadism (that might respond to gonadotropin injections), * The use of anabolic steroids, illicit drugs, or the consumption of more than 4 alcoholic beverages daily * Severe mental health problems requiring medications * Current therapy with retinoic acid (e.g. Accutane) or vitamin A. * Score of greater than 15 on the Patient health questionnaire (PHQ9). * Abnormal serum chemistry values according to local laboratory normal values which indicate liver or kidney dysfunction. Other abnormal lab values may also be exclusionary, at the discretion of the investigator * Men with a personal history of serious psychiatric disorders * Men currently receiving tetracycline containing medications * Men currently receiving phenytoin * Men with a history of inflammatory bowel disease * Men with a history of bone disease * Men who have used isotretinoin within eight weeks of the start of dosing * Men with elevated serum triglycerides

Design outcomes

Primary

MeasureTime frameDescription
Millions of Sperm Per EjaculateUp to 20-weeksMillions of sperm per ejaculate in men treated with 13-cis retinoic acid

Countries

United States

Participant flow

Participants by arm

ArmCount
13-cis Retinoic Acid
20mg 13-cis retinoic acid twice daily (BID) with meals for 20 weeks 13-cis retinoic acid: Accutane is used for the treatment of severe acne
10
13-cis Retinoic Acid + Calcitriol 0.25 mcg
oral calcitriol 025 mcg BID subjects 11-20 for 20 weeks Calcitriol: Calcitriol is a form of vitamin D given twice daily (BID)
10
Total20

Baseline characteristics

Characteristic13-cis Retinoic Acid13-cis Retinoic Acid + Calcitriol 0.25 mcgTotal
Age, Continuous36.1 years
STANDARD_DEVIATION 5.32
34 years
STANDARD_DEVIATION 3.4
34.61 years
STANDARD_DEVIATION 4.95
Race/Ethnicity, Customized
Asian
0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
White
10 Participants9 Participants19 Participants
Region of Enrollment
United States
10 participants10 participants20 participants
Sex: Female, Male
Female
0 Participants0 Participants0 Participants
Sex: Female, Male
Male
10 Participants10 Participants20 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 100 / 10
other
Total, other adverse events
1 / 101 / 10
serious
Total, serious adverse events
0 / 100 / 10

Outcome results

Primary

Millions of Sperm Per Ejaculate

Millions of sperm per ejaculate in men treated with 13-cis retinoic acid

Time frame: Up to 20-weeks

Population: First 10 men received isotretinoin alone, next 10 men received both isotretinoin and calcitriol

ArmMeasureValue (MEDIAN)
13-cis Retinoic AcidMillions of Sperm Per Ejaculate2.5 Millions of sperm per ejaculate
Calcitriol 0.25 mcgMillions of Sperm Per Ejaculate3.8 Millions of sperm per ejaculate

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026