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This is a small observational study aimed at observing differences in platelet function in HIV patients on abacavir versus tenofovir based anti-HIV drugs. There is some correlation between platelet activation and cardiovascular disease- this study will act as a pilot to see if platelet activation among abacavir users may explain the correlation between abacavir and cardiovascular disease in HIV positive patients.
This study will enroll 44 participants total; 22 on abacavir-based treatment, 22 on tenofovir-based treatment. There is only one study visit which includes a blood draw, physical assessment, and review of medical history.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Abacavir Group | HIV positive individuals currently taking an abacavir based regimen |
| |
| Tenofovir Group | HIV positive individuals currently taking a tenofovir based regime |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Platelet aggregation | Diagnostic Test | Platelet aggregation |
|
| Measure | Description | Time Frame |
|---|---|---|
| Platelet aggregation | Degree of platelet aggregation in response to adenosine diphosphate | At screening visit |
| Measure | Description | Time Frame |
|---|---|---|
| Plasma Markers of coagulation | sGPVI | At screening visit |
| Plasma Markers of Coagulation | sPSelectin | At screening visit |
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Inclusion Criteria:
Exclusion Criteria:
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HIV positive non smokers who are on a stable antiretroviral regimen containing either abacavir or tenofovir
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Clinical AIDS Research and Education Center | Los Angeles | California | 90025 | United States |
There is no plan to share individual participant data
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| ID | Term |
|---|---|
| D002318 | Cardiovascular Diseases |
| C566800 | Platelet Aggregation, Spontaneous |
| D000163 | Acquired Immunodeficiency Syndrome |
| ID | Term |
|---|---|
| D015658 | HIV Infections |
| D000086982 | Blood-Borne Infections |
| D003141 | Communicable Diseases |
| D007239 | Infections |
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| ID | Term |
|---|---|
| D010974 | Platelet Aggregation |
| ID | Term |
|---|---|
| D018056 | Hemorheology |
| D001790 | Blood Physiological Phenomena |
| D002943 | Circulatory and Respiratory Physiological Phenomena |
| D015539 | Platelet Activation |
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Plasma
| Plasma markers of endothelial function | sICAM | At screening visit |
| D015229 |
| Sexually Transmitted Diseases, Viral |
| D012749 | Sexually Transmitted Diseases |
| D016180 | Lentivirus Infections |
| D012192 | Retroviridae Infections |
| D012327 | RNA Virus Infections |
| D014777 | Virus Diseases |
| D012897 | Slow Virus Diseases |
| D000091662 | Genital Diseases |
| D000091642 | Urogenital Diseases |
| D007153 | Immunologic Deficiency Syndromes |
| D007154 | Immune System Diseases |
| D006487 | Hemostasis |