A Study of Male Rectal Samples in Preparation for Future Rectal Microbicide Trials

NCT ID: NCT00075062

Last Updated: 2008-08-21

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 16 participants
• Study Classification: OBSERVATIONAL

Brief Summary

Microbicides are drugs that destroy microbes such as viruses and bacteria. Rectal microbicides may be able to prevent transmission of HIV during anal intercourse. The purpose of this study is to obtain rectal samples from men to learn information that may be valuable in future clinical trials of rectal microbicides.

Detailed Description

Rectal microbicides to prevent HIV transmission are currently being developed in the hope that someday they will be widely used to prevent sexually transmitted HIV. This study will examine variables in male rectal tissue; this information may be useful for future rectal microbicide safety and efficacy studies. The study will evaluate the differences in rectal tissue from HIV infected or uninfected males who either engage in anal-receptive sex (men who sleep with men, or MSM) or do not have anal-receptive sex.

The study will last approximately 7 months, with 6 weeks of follow-up. There are four groups in this study. Groups 1 and 2 will enroll HIV uninfected men; Groups 3 and 4 will enroll HIV infected men. Groups 1, 3, and 4 will comprise MSM who engage in anal-receptive sex; Group 2 will comprise men who do not. Patients will provide medical and medication history, undergo a complete physical exam, and receive HIV counseling at screening. An anoscopy (examination of the anus, anal canal, and lower rectum) and blood draw will be conducted at screening, study entry, and Weeks 2 and 4. Rectal secretions will be collected and a sigmoidoscopy (an internal examination of the rectum, distal sigmoid colon, and large bowel using a small camera) will be performed at study entry and Weeks 2 and 4.

Conditions

HIV Infections; HIV Seronegativity

Study Design

• Study Time Perspective: PROSPECTIVE

Interventions

Flexible Sigmoidoscopy

Intervention Type: PROCEDURE

Rectal Biopsy

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

• HIV status confirmed by ELISA/Western Blot at screening
• CD4 count greater than 200 cells/mm3 at screening
• Able and willing to communicate in English
• Able and willing to provide adequate information for locator purposes

• Engaged in anal-receptive sex an average of at least once a week in the 2 months prior to study entry
• Agree to refrain from anal intercourse for 24 hours prior to and for one week after sigmoidoscopy

• No history of anal receptive intercourse in the 2 months prior to study entry

• Viral load of either greater than 10,000 copies of RNA/ml plasma or less than 50 copies RNA/ml plasma for at least 2 months prior to study entry
• Have not changed antiretroviral therapy within 6 weeks prior to study entry

Exclusion Criteria

• For HIV infected patients, 3 or more HSV-2 (herpes) outbreaks in the 12 months prior to screening or 1 or more HSV-2 outbreaks in the 6 months prior to screening
• Active, serious infections (other than HIV) requiring parenteral antibiotic therapy within 15 days prior to screening
• Inflammatory bowel disease (ulcerative colitis or Crohn's disease) or rectal cancer
• Rectal surgery, including fistulectomy
• Diagnosed bleeding disorder, including hemophilia, thrombocytopenia, impaired blood clotting, or current use of anticoagulants that, in the opinion of the investigator, would make participation in the study unsafe or complicate interpretation of study outcome data
• Prosthetic heart valve or diagnosis of valve abnormality
• Hemorrhoid surgery in the 6 months prior to screening
• Bleeding hemorrhoids at screening or in the 6 weeks prior to study entry
• Anal fistulae in the 6 weeks prior to study entry
• Active diarrheal disease (greater than 3 times a day) or bleeding disorder
• Rectal cultures positive for chlamydia or gonorrhea at screening or within 1 month prior to study entry
• Unprotected anal intercourse in the 3 months prior to study entry
• Any other clinical condition or prior therapy that, in the opinion of the investigator, would make the patient unsuitable for the study or unable to comply with study requirements
• Enrolled in any other clinical trial for the duration of their participation in HPTN 056

• Minimum Eligible Age: 18 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

NIH

Sponsor Role: collaborator

National Institute on Drug Abuse (NIDA)

NIH

Sponsor Role: collaborator

National Institute of Mental Health (NIMH)

NIH

Sponsor Role: collaborator

National Institute of Allergy and Infectious Diseases (NIAID)

NIH

Sponsor Role: lead

Principal Investigators

Ian McGowan, MD, PhD

Role: STUDY_CHAIR

University of California, Los Angeles

Peter Anton, MD

Role: STUDY_CHAIR

University of California, Los Angeles

Locations

David Geffen School of Medicine at UCLA

Los Angeles, California, United States

Countries

United States

References

Baron S, Poast J, Nguyen D, Cloyd MW. Practical prevention of vaginal and rectal transmission of HIV by adapting the oral defense: use of commercial lubricants. AIDS Res Hum Retroviruses. 2001 Jul 20;17(11):997-1002. doi: 10.1089/088922201300343672.

Reference Type: BACKGROUND

PMID: 11485616 (View on PubMed)

Garg S, Tambwekar KR, Vermani K, Kandarapu R, Garg A, Waller DP, Zaneveld LJ. Development pharmaceutics of microbicide formulations. Part II: formulation, evaluation, and challenges. AIDS Patient Care STDS. 2003 Aug;17(8):377-99. doi: 10.1089/108729103322277402.

Reference Type: BACKGROUND

PMID: 13678540 (View on PubMed)

Gross M, Buchbinder SP, Celum C, Heagerty P, Seage GR 3rd. Rectal microbicides for U.S. gay men. Are clinical trials needed? Are they feasible? HIVNET Vaccine Preparedness Study Protocol Team. Sex Transm Dis. 1998 Jul;25(6):296-302. doi: 10.1097/00007435-199807000-00005.

Reference Type: BACKGROUND

PMID: 9662763 (View on PubMed)

Other Identifiers

HPTN 056

Identifier Type: -

Identifier Source: org_study_id