Su.62. The Growth of the Infectivity of Target Cd4+ Cells Over Time Determines the Incubation Period of HIV Infection and Is the Dynamical Cause of the Onset of AIDS: Effective Co-Receptor Blockers Are the Most Direct Way to Prevent AIDS

2006 ◽  
Vol 119 ◽  
pp. S181
Author(s):  
Ivan Kramer
Keyword(s):  
Hiv Infection ◽  
Incubation Period ◽  
Cd4 Cells ◽  
Receptor Blockers ◽  
Over Time

Impact of Disclosure over Time on the Emotional Well-Being of Children with Perinatally Acquired HIV Infection in South Africa

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Janice Buckley ◽  
Kennedy Otwombe ◽  
Celeste Joyce ◽  
Given Leshabane ◽  
Lisa Galvin ◽  
...  
Keyword(s):  
South Africa ◽  
Hiv Infection ◽  
Well Being ◽  
Perinatally Acquired ◽  
Over Time

scholarly journals Molecular epidemiological analysis of HIV-1 variants circulating in Russia in 1987—2015

2017 ◽  
Vol 89 (11) ◽  
pp. 44-49 ◽  
Author(s):  
I A Lapovok ◽  
A E Lopatukhin ◽  
D E Kireev ◽  
E V Kazennova ◽  
A V Lebedev ◽  
...  
Keyword(s):  
Hiv Infection ◽  
Drug Users ◽  
Extensive Study ◽  
Nucleotide Sequences ◽  
Epidemiological Analysis ◽  
On Line ◽  
Diagnosis Date ◽  
Hiv 1 ◽  
Virus Subtype ◽  
Over Time

Aim. To simultaneously analyze HIV-1 samples from all Russian regions to characterize the epidemiology of HIV infection in the country as a whole. Subjects and methods. The most extensive study was conducted to examine nucleotide sequences of the pol gene of HIV-1 samples isolated from HIV-positive persons in different regions of Russia, with the diagnosis date being fixed during 1987—2015. The nucleotide sequences of the HIV-1 genome were analyzed using computer programs and on-line applications to identify a virus subtype and new recombinant forms. Results. The nucleotide sequences of the pol gene were analyzed in 1697 HIV-1 samples and the findings were that the genetic variant subtype A1 (IDU-A) was dominant throughout the entire territory of Russia (in more than 80% of all infection cases). Other virus variants circulating in Russia were analyzed; the phenomenon of the higher distribution of the recombinant form CRF63/02A in Siberia, which had been previously described in the literature, was also confirmed. Four new recombinant forms generated by the virus subtype A1 (IDU-A) and B and two AG recombinant forms were found. There was a larger genetic distance between the viruses of IDU-A variant circulating among the injecting drug users and those infected through heterosexual contact, as well as a change in the viruses of subtype G that caused the outbreak in the south of the country over time in 1988—1989. Conclusion. The findings demonstrate continuous HIV-1 genetic variability and recombination over time in Russia, as well as increased genetic diversity with higher HIV infection rates in the population.

scholarly journals Pleural pathology in HIV-infected patients: features of morphological diagnostics

Morphologia ◽  
2021 ◽  
Vol 15 (3) ◽  
pp. 109-118
Author(s):  
I.V. Liskina ◽  
L.M. Zagaba
Keyword(s):  
Hiv Infection ◽  
Clinical Diagnosis ◽  
Molecular Genetic ◽  
Unknown Etiology ◽  
Pleural Effusions ◽  
Cd4 Cells ◽  
Morphological Examination ◽  
Genetic Studies ◽  
Pleural Tuberculosis ◽  
Morphological Diagnostics

Background. The progression of HIV infection is accompanied by the development of opportunistic diseases, including pleural effusions of various origins. Morphological examination of pleura tissue in cases of pleural effusion serves as the basis for establishing the etiology of the pathological process and, therefore, the final clinical diagnosis. Objective – analysis of results of morphological diagnostics of pleura lesions in HIV-infected patients in comparison with other laboratory tests and clinical diagnosis. Methods. 103 cases of pleurisy of various origins were studied. Pleural biopsies were obtained by various types of minimally invasive diagnostic interventions with subsequent morphological examination. Results were compared with the available data of microbiological and molecular genetic studies of pleural biopsies. Results. At the time of hospitalization the preliminary clinical diagnosis was pleurisy of unknown etiology in 96,1 % of cases. A combined disease was diagnosed – hepatitis C in a third of all observations according to the results of laboratory tests. Due to routine staining with hematoxylin and eosin, tuberculosis lesions of the pleura were diagnosed in 59,2 %, the second most frequent was the diagnosis of nonspecific pleurisy, 20,4 %. According to the duration of the process, acute pleural tuberculosis was established in 19,7 % of cases, the subacute form of tuberculosis pleurisy – in 54,1 % of cases, and chronic pleural tuberculosis was established in 22,9 % of cases. In 17,5 % of cases, in order to clarify the etiology of pleurisy, additional histochemical staining for infectious agents was performed. The results of microbiological and molecular genetic studies were established in 76,7 % of cases. The greatest number of M. tuberculosis detection was obtained during the culture study of the biopsy material and exudates. When comparing the final clinical diagnosis and the level of CD4 cells in peripheral blood, it was found that in most cases (74,5 %) pleural effusions developed at low counts of CD4 cells, less than 350/l. Conclusion. Tuberculosis predominates in the etiological structure of pleural effusions in patients with HIV infection. Pleural tuberculosis can be the main secondary disease or be combined with pulmonary tuberculosis. In second place in terms of frequency of occurrence, nonspecific pleurisy was diagnosed as a complication of the main secondary disease. Pleural effusions develop when CD4 cell counts are low. Morphological diagnostics of pleural lesions is the main research method in the diagnostic algorithm of cases of pleural effusions of unknown etiology against the background of HIV infection.

V3 loop-derived multibranched peptides as inhibitors of HIV infection in CD4+ and CD4− cells

1996 ◽  
Vol 5 (1) ◽  
pp. 243-250 ◽  
Author(s):  
Jacques Fantini ◽  
Nouara Yahi ◽  
Kamel Mabrouk ◽  
Hervé Rochat ◽  
Jurphaas van Rietschoten ◽  
...  
Keyword(s):  
Hiv Infection ◽  
V3 Loop ◽  
Cd4 Cells

Interstitial Lung Abnormalities in People With HIV Infection and Uninfected Controls

2020 ◽  
Vol 221 (12) ◽  
pp. 1973-1977 ◽  
Author(s):  
Andreas Ronit ◽  
Thomas Benfield ◽  
Jens Lundgren ◽  
Jørgen Vestbo ◽  
Shoaib Afzal ◽  
...  
Keyword(s):  
Interstitial Lung Disease ◽  
Hiv Infection ◽  
Lung Disease ◽  
Chest Ct ◽  
Cross Sectional ◽  
Disease States ◽  
Ct Findings ◽  
Lung Abnormalities ◽  
Sectional Analysis ◽  
Over Time

Abstract Background Chest computed tomography (CT) findings in well-treated people with HIV infection (PWH) remain poorly characterized. Methods Cross-sectional analysis examining interstitial chest CT findings in PWH (n = 754) and uninfected controls (n = 470). Results HIV infection was independently associated with 1.82 (95% CI, 1.18–2.88) and 5.15 (95% CI, 1.72–22.2) higher adjusted odds of any interstitial lung abnormality and findings suspicious for interstitial lung disease, respectively. Conclusions HIV infection was independently associated with interstitial lung abnormalities and findings suspicious for interstitial lung disease. Whether these abnormalities develop into more recognizable disease states over time is unknown but warrants further investigation.

Aberrant and Unstable Expression of Immunoglobulin Genes in Persons Infected With Human Immunodeficiency Virus

Blood ◽  
1998 ◽  
Vol 92 (4) ◽  
pp. 1317-1323 ◽  
Author(s):  
Alberto Bessudo ◽  
Laura Rassenti ◽  
Diane Havlir ◽  
Douglas Richman ◽  
Ellen Feigal ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Hiv Infection ◽  
Healthy Adults ◽  
Immunoglobulin Genes ◽  
Expression Levels ◽  
Humoral Immune ◽  
Immunodeficiency Virus ◽  
Vh Gene ◽  
American Society ◽  
Over Time

We examined the IgM VH gene subgroup use-distribution in serial blood samples of 37 human immunodeficiency virus (HIV)-infected patients and a group of HIV-seronegative healthy adults. The IgM VH gene repertoires of healthy adults were relatively similar to one another and were stable over time. In contrast, individuals infected with HIV had IgM VH gene repertoires that were significantly more heterogeneous and unstable. Persons at early stages of HIV infection generally had abnormal expression levels of Ig VH3 genes and frequently displayed marked fluctuations in the relative expression levels of this VHgene subgroup over time. In contrast, persons with established acquired immunodeficiency syndrome (AIDS) had a significantly lower incidence of abnormalities in Ig VH3 expression levels, although continued to display abnormalities and instability in the expression levels of the smaller Ig VH gene subgroups. Moreover, the skewing and/or fluctuations in the expressed-IgM VHgene repertoire appeared greatest for persons at earlier stages of HIV infection. These studies show that persons infected with HIV have aberrant and unstable expression of immunoglobulin genes suggestive of a high degree humoral immune dysregulation and ongoing humoral immune responses to HIV-associated antigens and superantigens. © 1998 by The American Society of Hematology.

scholarly journals CD8+ T lymphocytes provide helper activity for IgE synthesis in human immunodeficiency virus-infected patients with hyper-IgE.

1995 ◽  
Vol 181 (1) ◽  
pp. 423-428 ◽  
Author(s):  
R Paganelli ◽  
E Scala ◽  
I J Ansotegui ◽  
C M Ausiello ◽  
E Halapi ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
T Cells ◽  
T Cell ◽  
Hiv Infection ◽  
Cd8 T Cells ◽  
Cd8 T Cell ◽  
Cd4 Cells ◽  
In Vitro Synthesis ◽  
Immunodeficiency Virus ◽  
Ige Synthesis

Increased levels of serum IgE and eosinophilia have been described in human immunodeficiency virus (HIV) infection, almost exclusively in patients with CD4+ cell count < 200 cells/microliters. IgE production is regulated by CD4+ T helper type 2 (Th-2) lymphocytes, producing interleukin 4 (IL-4) and expressing a ligand for the B cell-specific CD40 molecule (CD40 ligand [L]). A shift to a Th-2-like pattern of cytokine secretion has been postulated to be associated with progression toward acquired immunodeficiency syndrome (AIDS). We studied three AIDS patients with very high levels of IgE and almost complete depletion of CD4+ lymphocytes, suggesting that IgE synthesis could not be driven by CD4+ cells. IgE in vitro synthesis by cells from such patients was, however, inhibited by anti-IL-4. We show that both CD8+ T cell lines and the majority of CD8+ T cells clones derived from these patients produce IL-4, IL-5, and IL-6 in half of the cases together with interferon gamma (IFN-gamma). 44% of CD8+ T cell clones expressed a CD40L, and the supernatants of the clones were capable of inducing IgE synthesis by normal B cells costimulated with anti-CD40. CD8+ T cells in these patients therefore functionally mimic Th-2 type cells and may account for hyper-IgE and eosinophilia in the absence of CD4+ cells. The presence of such CD8+ cells may also provide a source of IL-4 directing the development of predominant Th-2 responses in HIV infection.

scholarly journals Associations between ACE-Inhibitors, Angiotensin Receptor Blockers, and Lean Body Mass in Community Dwelling Older Women

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Jennifer W. Bea ◽  
Sylvia Wassertheil-Smoller ◽  
Betsy C. Wertheim ◽  
Yann Klimentidis ◽  
Zhao Chen ◽  
...  
Keyword(s):  
Lean Body Mass ◽  
Body Mass ◽  
Ace Inhibitors ◽  
Angiotensin Receptor Blockers ◽  
Threshold Effect ◽  
Community Dwelling ◽  
Angiotensin Receptor ◽  
Linear Regression Models ◽  
Receptor Blockers ◽  
Over Time

Studies suggest that ACE-inhibitors (ACE-I) and angiotensin receptor blockers (ARBs) may preserve skeletal muscle with aging. We evaluated longitudinal differences in lean body mass (LBM) among women diagnosed with hypertension and classified as ACE-I/ARB users and nonusers among Women’s Health Initiative participants that received dual energy X-ray absorptiometry scans to estimate body composition (n=10,635) at baseline and at years 3 and 6 of follow-up. Of those, 2642 were treated for hypertension at baseline. Multivariate linear regression models, adjusted for relevant demographics, behaviors, and medications, assessed ACE-I/ARB use/nonuse and LBM associations at baseline, as well as change in LBM over 3 and 6 years. Although BMI did not differ by ACE-I/ARB use, LBM (%) was significantly higher in ACE-I/ARB users versus nonusers at baseline (52.2% versus 51.3%, resp., p=0.001). There was no association between ACE-I/ARB usage and change in LBM over time. Reasons for higher LBM with ACE-I/ARB use cross sectionally, but not longitundinally, are unclear and may reflect a threshold effect of these medications on LBM that is attenuated over time. Nevertheless, ACE-I/ARB use does not appear to negatively impact LBM in the long term.

scholarly journals Impact of HIV-Infection on Serum Liver Enzymes: A Comparative Study among Anti-retroviral Therapy (ART) Naïve Patients, ART Follow-Up Patients, and HIV Sero-negative Controls

2018 ◽  
pp. 196-200
Keyword(s):  
Hiv Infection ◽  
Liver Enzyme ◽  
Liver Enzymes ◽  
Study Groups ◽  
Hepatic Function ◽  
Cd4 Cells ◽  
Hiv Patients ◽  
Cd4 Cell Count ◽  
The Impact

Background of study: There is emerging evidence that human immunodeficiency virus (HIV) infection, even in the absence of anti-retroviral therapy (ART) toxicity and other cofactors, may have a direct impact on liver pathogenesis. Aim: Based on this premise, our study determined the impact of HIV infection on liver enzymes as markers of hepatic function. Methods: the case-control study comprised of a total of 60 participants (30 males and 30 females) aged 18-60 years. The study compared aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), cluster of differentiation (CD4+) cells among ART-naïve HIV patients (n=20), follow-up HIV patients who were on highly active ART (n=20) and apparently healthy controls (n=20). Results: a significant (P<0.05) change was observed in the liver enzymes and CD4+ cells among the study groups compared. Specific changes showed that serum AST, ALP levels of ART-naïve patients were significantly (P<0.05) higher than that of follow-up and controls. Serum ALT levels of controls were significantly (P<0.01) lower than that of ART-naïve and follow-up patients. The CD4+ cell count of ART-naïve patients was significantly (P=0.000) lower than that of follow-up and control groups. Conclusion: Liver enzyme abnormalities were observed in ART naïve HIV infected patients. Consequently, there is a need to monitor liver enzyme levels before and after initiation of therapy.

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