HIV-1 Specific Immune Responses in Thai Individuals With HIV Dementia

The recruitment status of this study is unknown because the information has not been verified recently.
Verified September 2008 by South East Asia Research Collaboration with Hawaii.
Recruitment status was  Recruiting
Sponsor:
Information provided by:
South East Asia Research Collaboration with Hawaii
ClinicalTrials.gov Identifier:
NCT00777426
First received: October 21, 2008
Last updated: July 21, 2011
Last verified: September 2008
  Purpose

A total of 60 participants will be enrolled. They will be in 3 groups

  1. ARV-naïve, HIV-positive ≥ 20 year of age with HAD (n=25) who intend to start ARV
  2. ARV-naïve, HIV-positive ≥ 20 year of age without HAD (n=25), who intend to start ARV
  3. HIV-negative ≥ 20 year of age (n=10). The protocol team will work with the primary care physician to ensure that the subjects receive standard HIV and ARV care; however, initiation of ARV is not a requirement of the study and ARV will not be provided by the study.

Participant accrual will include 10-15 participants per year. HIV-positive subjects will be tentatively enrolled in HAD vs. non-HAD groups by the enrolling neurologist and subsequently confirmed to that group by a consensus conference held every 6 months by the study neurologists. In cases of disagreement, cases will be re-assigned to the consensus conference determination and recruitment will continue. An external validation consensus conference will be conducted as well every 6-12 months to monitor correct assignment of the level of impairment.


Condition
HIV Infections

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective

Resource links provided by NLM:


Further study details as provided by South East Asia Research Collaboration with Hawaii:

Biospecimen Retention:   Samples Without DNA

PBMC, Plasma, Urine


Estimated Enrollment: 49
Study Start Date: September 2008
Estimated Study Completion Date: September 2012
Groups/Cohorts
Thai HAD individuals (25 cases)
Thai Non-HAD individuals (25 cases)
Thai Non-infected individuals (10 cases)

Detailed Description:

This application focuses on the role of cellular immune responses in HIV dementia (HAD) versus non-HAD individuals in a cognitively characterized cohort followed for one year.

Increasing evidence links strong CD4+ T helper function to robust CD8+ CTL responses. HIV-1-infected individuals who are able to maintain strong HIV-1 specific T cell responses have better clinical outcomes and rarely develop neurological signs or symptoms. Monocyte/macrophage (M/M) infiltration into the white matter of the brain is a hallmark of HAD; however, the mechanisms by which M/M are recruited to the brain are not clearly understood. We hypothesize that the loss of specific HIV-1 T cell response results in activation/dysregulation of M/M leading to their accumulation in the brain.

To test this hypothesis will characterize Thai HIV-1-infected individuals as follows: 25 HAD individuals, 25 CD4-, education-, gender-, and age-matched non-HAD individuals and 10 HIV negative controls. We will then: 1) define CD4+ and CD8+ T cell function by evaluating HIV-1 specific responses in HAD vs. non-HAD groups; 2) simultaneously correlate these responses to M/M subpopulation cell number, percentage, and immune function; 3) correlate these responses to HIV-1 proviral load and autologous viral sequences (viral escape sequences and HIV quasispecies); and 4) evaluate the impact of ARV on dementia related to changes in immunological responses. Since little is known of the interaction between CD4+ T helper responses, CTL function, and the level of M/M subpopulation activation in the neuropathogenesis of HAD, this innovative study will elucidate the role of HIV-1 specific immune responses in HAD and provide new insights into HIV-1 neuropathogenesis and its relationship to peripheral immune responses, potentially opening exciting new areas for further investigation.

  Eligibility

Ages Eligible for Study:   20 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

A total of 60 participants will be enrolled. They will be in 3 groups

  1. ARV-naïve, HIV-positive ≥ 20 year of age with HAD (n=25) who intend to start ARV
  2. ARV-naïve, HIV-positive ≥ 20 year of age without HAD (n=25), who intend to start ARV
  3. HIV-negative ≥ 20 year of age (n=10). The protocol team will work with the primary care physician to ensure that the subjects receive standard HIV and ARV care; however, initiation of ARV is not a requirement of the study and ARV will not be provided by the study.
Criteria

Inclusion Criteria:

Group Thai HAD individuals

  • 20 years of age

    • not currently receiving nor have ever received antiretroviral medications
    • not explained by opportunistic infections or causes other than HIV on the basis of clinical assessment and neuropsychological testing and eligible for inclusion.

Group Thai Non-HAD individuals

  • will be matched with a seropositive Thai patient with similar age (same decade), education (less than high school degree, high school degree +/- some college, college degree +), gender, and CD4 group
  • HIV positive
  • not currently receiving nor have ever received antiretroviral medications.

Group Thai Non-HAD individuals will be matched with a Thai seronegative patient by age (same decade), and education (less than high school degree, high school degree +/- some college, college degree+), and gender.

Exclusion Criteria:

  • Head injury with loss of consciousness greater than 1 hour
  • Current or past illicit drug use (less then 5 years) or positive drug screen for amphetamine, methamphetamines, cocaine, marijuana, or narcotics at either screening or entry.
  • Inability to provide informed consent or lack of designated surrogate who can provide consent
  • The following laboratory values:
  • PT/PTT > the upper limit of normal (ULN) or INR > 1.1
  • Hemoglobin < 9.0 mg/dL
  • ALT > 5x ULN
  • serum creatinine > 2x ULN or creatinine clearance < 30 cc per min by Cockroft-Gault formula
  • Acute illness within 30 days prior to entry, persistent and active AIDS- defining opportunistic infection or autoimmune disease. Stable treated opportunistic infections on maintenance therapy, minor infections such as oral thrush and Kaposi's Sarcoma limited to the skin will be allowed.
  • Current or recent fevers or meningeal signs suggestive of CNS opportunistic infection.*
  • History of pre-existing neurologic disease to include stroke, multiple sclerosis
  • History of psychiatric illness including schizophrenia, bipolar disorder, anxiety disorder, panic attacks, or post traumatic stress disorder. Patients with active major depression will be excluded as well - patients with past depression that is controlled and patients with or minor depressive symptoms will be allowed to enroll.
  • Known learning disability including dyslexia.
  • Positive Hepatitis C serology (Hepatitic C Ab)
  • Confusion or other signs and symptoms of metabolic encephalopathy or delirium
  • Mass consistent with opportunistic infection or tumor on CT or MRI of the head, or focal neurological deficit on examination consistent with possible brain lesion.*
  • Other conditions that could explain neurocognitive decline in the opinion of the investigator such as hypothyroidism, vitamin B12 deficiency or neurosyphilis.
  • Pregnancy.
  • Not willing to take an MRI.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00777426

Contacts
Contact: Jintanat - Ananworanich, MD 662-254-2566 ext 101 jintanat.a@searchthailand.org
Contact: Somporn - Tipsuk, RN 662-254-2566 ext 107 somporn.t@searchthailand.org

Locations
Thailand
SEARCH Thailand Recruiting
Bangkok, Thailand
Contact: Somporn Tipsuk, RN    662-254-2566 ext 107    somporn.t@searchthailand.org   
Sponsors and Collaborators
South East Asia Research Collaboration with Hawaii
Investigators
Principal Investigator: Jintanat Ananworanich, MD South East Asia Research Collaboration with Hawaii
  More Information

Additional Information:
No publications provided

Responsible Party: Somporn Tipsuk, SEARCH ,Thailand
ClinicalTrials.gov Identifier: NCT00777426     History of Changes
Other Study ID Numbers: SEARCH 007
Study First Received: October 21, 2008
Last Updated: July 21, 2011
Health Authority: Thailand: Ethical Committee

Keywords provided by South East Asia Research Collaboration with Hawaii:
HIV positive with HAD

Additional relevant MeSH terms:
HIV Infections
Acquired Immunodeficiency Syndrome
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Slow Virus Diseases

ClinicalTrials.gov processed this record on August 28, 2014