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Studies Recruiting Only Men

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Featured Studies

Featured studies include only those currently recruiting participants. Studies with the most recent start date appear first.

Comparison of Men's Prevention Apps to Research Efficacy

Study Type: Interventional
Start Date: October 14, 2019
Locations: Tampa, Florida; Atlanta, Georgia; Chicago, Illinois; Boston, Massachusetts; Bronx, New York; Philadelphia, Pennsylvania; Houston, Texas
Eligibility: Males, Ages 15–24, Accepts Healthy Volunteers

A randomized three arm control trial to examine the efficacy of two distinct apps (LYNX and MyChoices) developed for young men who have sex with men (YMSM) compared to standard of care (SOC) information about HIV testing and PrEP (Pre-Exposure Prophylaxis).

A Pragmatic Trial of Two Strategies for Implementing an Effective eHealth HIV Prevention Program (Keep It Up! 3.0)

Study Type: Interventional
Start Date: October 9, 2019
Location: Chicago, Illinois
Eligibility: Males, Ages 18–29, Accepts Healthy Volunteers

This study evaluates and compares two implementation strategies of an online HIV prevention intervention: Strategy 1 in which community-based organizations apply, and are selected, for funding to deliver Keep It Up! through current HIV testing programs; and Strategy 2 which is a "direct-to-consumer" model where centralized staff at Northwestern University recruit participants nationally through online advertising campaigns and manage engagement.

Personalized HIV and STI Testing Tool

Study Type: Interventional
Start Date: September 18, 2019
Location: San Francisco, California
Eligibility: Males, Ages 18–29, Accepts Healthy Volunteers

The PHASTT Study is focused on understanding of facilitators and barriers to mHealth use among young Black men who have sex with men (MSM), and testing a novel mobile app to increase HIV/STI testing and PrEP uptake.

PrEP Seguro: Antiretroviral-based HIV Prevention Among Men at High Risk in Mexico

Study Type: Interventional
Start Date: May 15, 2019
Location: Mexico City, DF, Mexico
Eligibility: Males, Ages 18 and Older, Accepts Healthy Volunteers

The objective of this R34 application is to prepare for testing innovative user-centered ways to promote PrEP adherence at scale. Our central hypothesis is that adherence to PrEP can be improved among MSW if PrEP is provided for free along with highly-tailored conditional economic incentives (CEI). The specific aims are: Aim 1: To refine the design of PrEP adherence intervention with user-centered conditional economic incentives to maximize sustained adherence behaviors through a user-responsive computerized survey (n=200). We incorporate quantitatively identified preferences for CEIs through a user- responsive computerized survey. We use conjoint analysis to understand preferences for CEI intervention components and how CEIs should be integrated into an optimal combination package to be tested in Aim 2. Aim 2: Measure the extent to which a user-centered CEI intervention can help MSW increase their adherence to free PrEP in a randomized controlled pilot (n=100). Among MSW who accept to take free PrEP, and return at month 1 for a second pill bottle, we will randomize n=100 MSW to either: standard of care (SoC: information, prescription, free PrEP) or CEI (SoC + incentives contingent on sufficiently-high adherence to PrEP). We will assess the primary outcome (biomarker of adherence using scalp hair analysis) at months 3 and 6, as well as secondary outcomes: clinic attendance/retention, medication possession ratio, self-reported PrEP use, and sexual behavioral disinhibition (number of partners, condom use, incident STI). Aim 3: Estimate the preliminary cost-effectiveness of incentives for PrEP adherence to maximize future policy and practice relevance of this promising intervention strategy. Our working hypothesis is that conditional economic incentives for PrEP adherence will be cost-effective in terms of cost per fully- adherent month on PrEP, cost per HIV infection averted, and cost per disability-adjusted life year saved when compared to controls not receiving the conditional incentives. The expected outcome of this R34 is a demonstration that is feasible to implement user-centered CEIs in this context, as well as preliminary efficacy and cost-effectiveness data. The project will have positive impact because it is a critical step toward scaled-up implementation of PrEP in this highly-at-risk population of MSWs in Mexico, with implications for other concentrated epidemics among MSW worldwide.

Tough Talks: A Disclosure Intervention for HIV+ Young Men Who Have Sex With Men (YMSM)

Study Type: Interventional
Start Date: May 7, 2019
Location: Chapel Hill, North Carolina
Eligibility: Males, Ages 16–29, Does Not Accept Healthy Volunteers

Tough Talks is a virtual reality based HIV disclosure intervention that allows HIV+ individuals to practice disclosing to romantic partners. Tough Talks allows participants to have the opportunity to practice disclosing using a variety of strategies and experience different outcomes including acceptance, confusion, lack of HIV knowledge, and rejection.

Pre-exposure Prophylaxis (PrEP) at Home

Study Type: Interventional
Start Date: April 26, 2019
Locations: Atlanta, Georgia; Boston, Massachusetts; Jackson, Mississippi; Saint Louis, Missouri
Eligibility: Males, Ages 18–49, Accepts Healthy Volunteers

This study is a randomized clinical trial of PrEP@Home, a home care system for Human Immunodeficiency Virus (HIV) Pre-Exposure Prophylaxis (PrEP). Individuals entering into PrEP care at an initial in-person study visit will be randomized to the PrEP@Home system for home-based PrEP care follow-up visits or to the control standard of care for clinic-based follow-up visits. The primary aim of this study is to assess protective levels of PrEP medication for the intervention arm compared to the control arm.

Depression Intervention Among Gay and Bisexual Men Receiving Treatment for Methamphetamine Use

Study Type: Interventional
Start Date: February 25, 2019
Location: Los Angeles, California
Eligibility: Males, Ages N/A and Older, Does Not Accept Healthy Volunteers

This study is a single-arm, non-randomized pilot study. Eligible participants are newly enrolled participants in an outpatient methamphetamine treatment program, and study activities will take place contemporaneously with participation in the service program. During the first two weeks of the treatment program, participants will be offered the chance to enroll in a low-intensity, internet-based depression intervention called MoodGym. Participants that agree to enroll will be offered the chance to attend up to seven MoodGym sessions at the same time they undergo outpatient methamphetamine treatment. It is hypothesized that sexual risk outcomes, as well as medication adherence (e.g., PrEP/PEP; ART) outcomes will be optimized for participants who enroll to receive the MoodGym intervention content.

eTest: Real-time, Remote Monitoring System for Home-based HIV Testing Among High-risk Men Who Have Sex With Men

Study Type: Interventional
Start Date: January 23, 2019
Location: Providence, Rhode Island
Eligibility: Males, Ages 18 and Older, Accepts Healthy Volunteers

The proposed research will conduct a fully-powered efficacy trial of this approach in areas with large populations of AA and H/L MSM and high HIV incidence: Jackson, MS, Los Angeles, CA, and Boston, MA. High-risk MSM who have not tested for HIV in the last year will be recruited from MSM-oriented "hook-up" mobile apps, and assigned to receive either (1) HBST with post-test phone counseling/referral ("eTEST" condition), (2) "standard" HBST without active follow-up, or (3) reminders to get tested for HIV at a local clinic ("control" condition) at three month intervals over the course of 12 months. The investigators will explore the impact of the eTEST system on key outcomes, including rates of HIV testing, receipt of additional HIV prevention services, and PrEP initiation, compared with standard HBST or clinic-based testing reminders alone. The investigators will also explore the cost effectiveness of the eTEST system under various scenarios compared with relying on traditional, clinic-based testing alone.

Stigma and Online Counseling to Increase HIV/STI Testing

Study Type: Interventional
Start Date: December 31, 2016
Location: Atlanta, Georgia
Eligibility: Males, Ages 18 and Older, Does Not Accept Healthy Volunteers

The alarmingly high rates of HIV/STI (sexually transmitted infections) observed among Black men who have sex with men (BMSM) necessitate a new model for engaging BMSM. New approaches include addressing stigma related concerns and structural barriers in order to increase HIV/STI testing uptake. This research includes a 2 x 2 factorial design to test an intervention that is aimed at increasing HIV/STI testing uptake among BMSM; this design includes testing HIV/STI stigma focused counseling, and online HIV/STI test counseling with at-home, self-administered HIV and STI test kits.

Retention in PrEP Care for African American MSM in Mississippi

Study Type: Interventional
Start Date: September 7, 2016
Location: Jackson, Mississippi
Eligibility: Males, Ages 18–35, Accepts Healthy Volunteers

Innovative and novel HIV prevention interventions are urgently needed for African American (AA) young men who have sex with men (YMSM) in the South, and in Mississippi in particular. HIV pre-exposure prophylaxis (PrEP) is a newer HIV prevention strategy that consists of a daily oral antiretroviral pill taken on an ongoing basis by HIV-uninfected but at-risk individuals. Although acceptability studies have demonstrated high interested in PrEP in the US, uptake remains limited. To date, studies of PrEP initiation have largely been limited to settings in which PrEP is provided free of charge. Barriers to PrEP initiation and retention in PrEP care in real world settings are likely more complex, since payment for PrEP can be a substantial financial burden.

The ADAPT_ITT approach (an approach to adapting behavioral interventions to new populations: Assessment, Decision, Administration, Production, Topical Experts - Integration, Training, Testing) will be used to develop and pilot test a RAMP (Retain African American Men in PrEP) intervention that aims to promote PrEP adherence and retention in care in Jackson, MS and focuses on recruiting AA YMSM in a city with some of the highest HIV infection rates in the country. This study will include formative research to understand the cultural and social contexts that influence AA YMSM's PrEP use patterns and the acceptability of our proposed intervention. Results from these qualitative interviews will inform the study intervention which will be tested and refined in a dynamic open pilot evaluation.

Imaging Cannabinoid Receptors Using Positron Emission Tomography (PET) Scanning

Study Type: Observational
Start Date: July 31, 2010
Location: New Haven, Connecticut
Eligibility: Males, Ages 18–55, Accepts Healthy Volunteers

The aim of the present study is to assess the availability of cannabinoid receptors (CB1R) in the human brain. CB1R are present in everyone's brain, regardless of whether or not someone has used cannabis. The investigators will image brain cannabinoid receptors using Positron Emission Tomography (PET) imaging and the radioligand OMAR, in healthy individuals and several conditions including 1) cannabis use disorders, 2) psychotic disorders, 3) prodrome of psychotic illness and 4) individuals with a family history of alcoholism, using the PET imaging agent or radiotracer, [11C]OMAR. This will allow us to characterize the number and distribution of CB1R in these conditions. It is likely that the list of conditions will be expanded after the collection of pilot data and as new data on cannabinoids receptor function and psychiatric disorders becomes available.

Those in the cannabis us disorder arm of the study will have a PET scan on at least three occasions: once while smoking as usual, once after 48-hours of abstinence from cannabis, and a final time after 4 weeks of abstinence. Additional scans may be conducted within the 4 weeks and the last scan may be conducted well beyond 4 weeks. Similarly, while most schizophrenia patients may get scanned just once, a subgroup of patients may get scanned more than once. For example to tease out the effects of medications, unmedicated patients may get scanned while unmedicated and again after treatment with antipsychotic medications. Similarly prodromes may get scanned while in the prodromal stage off medications, on medications and after conversion to schizophrenia.

Protein Synthesis in the Brain of Patients With Fragile X Syndrome

Study Type: Observational
Start Date: August 8, 2006
Location: Bethesda, Maryland
Eligibility: Males, Ages 18–24, Accepts Healthy Volunteers

Biosynthesis of proteins is essential for growth and continued maintenance of the entire neuron including axons, dendrites, and synaptic terminals, and it is clearly one of the important biochemical processes underlying adaptive changes in the nervous system. Studies in experimental animals with the quantitative autoradiographic L [1 (14)C]leucine method have demonstrated a number of the physiological and pathological conditions in which changes in regional rates of cerebral protein synthesis (rCPS) occur.

We have recently developed the first fully quantitative method for determining rCPS with positron emission tomography (PET). The PET method was adapted from the autoradiographic L [1 (14)C]leucine method; it uses L [1 (11)C]leucine as the PET tracer, dynamic scanning, and a kinetic modeling approach for quantification. This method was validated in nonhuman primates by comparison of PET measurements with those based on established biochemical and autoradiographic techniques.

The objective of the present study is to examine the degree to which changes in rCPS in human subjects can be quantified with the L [1 (11)C]leucine PET method. We propose three studies to be carried out sequentially. In Part I we will establish the L-[1-(11)C]leucine PET method in human subjects. In Part II we will measure rCPS in normal control subjects in two states: awake and under deep sedation/general anesthesia with propofol. A difference in rCPS between these two states may indicate that we can detect activity-dependent protein synthesis with the PET method. In Part III we will study subjects with fragile X syndrome. This patient group was chosen since the affected gene in fragile X syndrome codes for a protein that is thought to be a negative regulator of message translation. Thus an effect on protein synthesis may be very close to the underlying genetic abnormality in fragile X syndrome. Regionally selective increases in rCPS have been found in studies in a mouse model of this disease.

The present study will establish the sensitivity of the L [1 (11)C]leucine PET method to detect changes in rCPS in human subjects. A quantitative and sensitive method to measure rCPS with PET will augment the tools available for investigating the brain and its regional adaptive responses. Ultimately the method may have widespread applications, not only for the study of normal development and plasticity but also in clinical medicine, e.g., in the investigation of disorders of brain development, recovery from brain injury, and neurodegenerative diseases.


1. Establish the L-[1-(11)C]leucine PET method for measurement of rCPS in human subjects. Evaluate the optimal scan time and the variability of the measurement in an individual.

2. Determine the effect of deep sedation with propofol on rCPS in normal human subjects. We will use the [1-(11)C]leucine PET method to evaluate lambda, i.e., the fraction of the precursor pool for protein synthesis that is derived from arterial plasma, and rCPS in the same subjects under awake and deep sedation conditions.

I) Hypothesis 1a. Deep sedation with propofol has effects on rCPS.

II) Hypothesis 1b. Deep sedation with propofol has effects on values of lambda.

3. Assess the sensitivity of the [1-(11)C]leucine PET method to detect differences in rCPS in subjects with fragile X syndrome.

I) Hypothesis 3a. There are regionally selective changes in rCPS in subjects with fragile X syndrome compared with age-matched healthy controls. Regions affected include hippocampus, thalamus, hypothalamus, amygdala, and frontal and parietal cortex.

II) Hypothesis 3b. In centrum semiovale, cerebellum, striatum and occipital and temporal cortex rCPS are unchanged in subjects with fragile X syndrome compared with age-matched healthy controls.

III) Hypothesis 3c. Values of lambda in the brain as a whole and in the regions examined are unchanged in subjects with fragile X syndrome compared with age-matched healthy controls.

IV) Hypothesis 3d. The average rate of protein synthesis in the brain as a whole is unchanged in subjects with fragile X syndrome compared with age-matched healthy controls.