The CYP2B6 G516T polymorphism influences CD4 + T-cell counts in HIV-positive patients receiving antiretroviral therapy in an ethnically diverse region of the Amazon

Background. The “red complex” microorganisms, namely,Porphyromonas gingivalis,Treponema denticola, andTannerella forsythiaare considered as potential pathogens causing HIV-associated periodontal diseases. Moreover, it has been recognized that an association exists between CD4+ T cell counts and periodontal disease progression.Objective. To establish whether CD4+ T cell counts or oral hygiene plays a greater role in producing BANA-positive results in HIV-associated periodontal disease.Materials and Methods. One hundred and twenty HIV-positive patients participated in the study, and their CD4+ T cell counts were obtained from their medical records. The six Ramfjord teeth were used for evaluating periodontal clinical indices and subgingival plaque sampling. BANA test was used for the detection and prevalence of the “red complex” bacteria in plaque samples.Results. A majority of 69.17% HIV-positive patients were BANA-positive. No significant associations were found between BANA and CD4+ T cell counts. A highly significant association was found between BANA with probing depth and clinical attachment level (P≤0.0001) and between BANA and the use of interdental aids (P=0.0168).Conclusion. HIV-associated periodontal diseases are strongly related to oral hygiene practices rather than the effect of CD4+ T cell counts, and the use of interdental aids was marked as a significant predictor of BANA-negative plaque samples.

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Persistence of Genital Tract T Cell Responses in HIV-Infected Women on Highly Active Antiretroviral Therapy

Journal of Virology ◽

10.1128/jvi.00518-10 ◽

2010 ◽

Vol 84 (20) ◽

pp. 10765-10772 ◽

Cited By ~ 9

Author(s):

Nonhlanhla N. Mkhize ◽

Pamela P. Gumbi ◽

Lenine J. Liebenberg ◽

Yuan Ren ◽

Peter Smith ◽

...

Keyword(s):

T Cell ◽

Antiretroviral Therapy ◽

Highly Active Antiretroviral Therapy ◽

Genital Tract ◽

T Cell Responses ◽

Antiretroviral Drugs ◽

Cd4 T Cell ◽

Cell Responses ◽

Highly Active ◽

Cell Counts

ABSTRACT Initiation of highly active antiretroviral therapy (HAART) for HIV-infected individuals is associated with control of viremia, improved CD4 counts, and declining systemic HIV-specific immune responses. While HAART effectively reduces plasma viremia, it remains unclear how effectively antiretroviral drugs reach mucosal surfaces, such as those of the genital tract. The aim of this study was to determine the effect of HAART on genital tract CD4 T cell reconstitution, HIV shedding, and HIV-specific T cell responses. Cervical cytobrush and blood specimens were obtained from 35 HIV-infected, HAART-naïve women and 27 women on HAART in order to investigate HIV Gag-specific T cell responses by intracellular gamma interferon (IFN-γ) staining. Interleukin 1β (IL-1β), IL-6, and IL-8 concentrations were measured by enzyme-linked immunosorbent assays (ELISA). We show that for HIV-infected women, HAART is associated with significantly improved CD4 T cell counts both in blood and at the cervix. While HAART effectively suppressed both blood and cervical viremia, HIV-specific CD8 T cell responses in blood were lost, while those at the cervix were preserved.

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PIMATM point-of-care testing for CD4 counts in predicting antiretroviral initiation in HIV-infected individuals in KwaZulu-Natal, Durban, South Africa

Southern African Journal of HIV Medicine ◽

10.4102/sajhivmed.v17i1.444 ◽

2016 ◽

Vol 17 (1) ◽

Cited By ~ 2

Author(s):

Mandisa Skhosana ◽

Shabashini Reddy ◽

Tarylee Reddy ◽

Siphelele Ntoyanto ◽

Elizabeth Spooner ◽

...

Keyword(s):

South Africa ◽

T Cells ◽

T Cell ◽

Antiretroviral Therapy ◽

Cell Count ◽

Point Of Care ◽

Cd4 T Cell ◽

Cell Counts ◽

Kwazulu Natal ◽

Cd4 T Cell Count

Introduction: Limited information is available on the usefulness of the PIMATM analyser in predicting antiretroviral treatment eligibility and outcome in a primary healthcare clinic setting in disadvantaged communities in KwaZulu-Natal, South Africa.Materials and methods: The study was conducted under the eThekwini Health Unit, Durban, KwaZulu-Natal. Comparison of the enumeration of CD4+ T-cells in 268 patients using the PIMATM analyser and the predicate National Health Laboratory Services (NHLS) was undertaken during January to July 2013. Bland-Altman analysis to calculate bias and limits of agreement, precision and levels of clinical misclassification at various CD4+ T-cell count thresholds was performed.Results: There was high precision of the PIMATM control bead cartridges with low and normal CD4+ T-cell counts using three different PIMATM analysers (%CV < 5). Under World Health Organization (WHO) guidelines (≤ 500 cells/mm3), the sensitivity of the PIMATM analyser was 94%, specificity 78% and positive predictive value (PPV) 95%. There were 24 (9%) misclassifications, of which 13 were false-negative in whom the mean bias was 149 CD4+ T-cells/mm3. Most (87%) patients returned for their CD4 test result but only 67% (110/164) of those eligible (≤ 350 cells/mm3) were initiated on antiretroviral therapy (ART) with a time to treatment of 49 days (interquartile range [IQR], 42–64 days).Conclusion: There was adequate agreement between PIMATM analyser and predicate NHLS CD4+ T-cell count enumeration (≤ 500 cells/mm3) in adult HIV-positive individuals. The high PPV, sensitivity and acceptable specificity of the PIMATM analyser technology lend it as a reliable tool in predicting eligibility and rapid linkage to care in ART programmes.Keywords: HIV; Point of Care; PIMATM CD4+ T cell counts; antiretroviral therapy; prediction/eligibility; South Africa

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