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| PANTIC,IGOR; PANTIC,SENKA; PAUNOVIC,JOVANA; PEROVIC,MILAN. |
| Grey level co-occurrence matrix analysis (GLCM) is a well-known mathematical method for quantification of cell and tissue textural properties, such as homogeneity, complexity and level of disorder. Recently, it was demonstrated that this method is capable of evaluating fine structural changes in nuclear structure that otherwise are undetectable during standard microscopy analysis. In this article, we present the results indicating that entropy, angular second moment, variance, and texture correlation of lymphocyte nuclear structure determined by GLCM method are different in thymus cortex when compared to medulla. A total of 300 thymus lymphocyte nuclei from 10 one-month-old mice were analyzed: 150 nuclei from cortex and 150 nuclei from medullar regions of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Texture analysis; GLCM matrix; CD4; CD8; Gene. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301063 |
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| Davoudi,Setareh; Rasoolinegad,Mehrnaz; Younesian,Masoud; Hajiabdolbaghi,Mahboubeh; Soudbakhsh,Abdolreza; Jafari,Sirous; EmadiKouchak,Hamid; Mehrpouya,Morteza; Lotfi,Hossein. |
| Tuberculosis is the prototype of infections that require a cellular immune response for their control. It has been shown that CD4+ T-lymphocytes are most important in the protective response against Mycobacterium tuberculosis. CD8+ T-lymphocytes are also important for effective T-cell immune response. This study compares CD4+ and CD8+ baseline values in patients with different manifestations of tuberculosis. CD4+ and CD8+ in three groups of patients with tuberculosis (pulmonary, lymphadenitis, meningitis/milliary involvement) and a group of healthy volunteers were enumerated using flowcytometry. Twenty-six patients with pulmonary tuberculosis, 10 with adenitis, 16 with meningitis or milliary tuberculosis and 16 healthy volunteers entered the study. Mean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tuberculosis; Mycobacterium tuberculosis; CD4. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702008000600008 |
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| Pereira,Marcela Fonseca; Luz,Estela; Martins Netto,Eduardo; Barbosa,Manoel Henrique Fonseca; Brites,Carlos. |
| ABSTRACT Early initiation of antiretroviral therapy increases the likelihood of effective immune restoration, quality of life, and greater life expectancy for HIV-infected individuals. We evaluated the evolution of mean CD4+ cells count at diagnosis of HIV/AIDS in Salvador, Brazil from 2002 to 2015. We identified HIV/AIDS patients older than 18 years with diagnosis of HIV infection from 2002 to 2015, who had their first laboratory evaluation at Complexo Hospitalar Prof. Edgard Santos, Federal University of Bahia. Initial mean CD4+ cells count and age, over time were evaluated. A total of 1801 patients randomly selected individuals were included in the analysis. Overall mean CD4+ count at diagnosis in the whole period was 279 ± 265, varying from 191 in 2015... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: HIV/AIDS; CD4; Antiretroviral therapy. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000300245 |
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| Torres,A.J.L.; Angelo,A.L.D.; Netto,E.M.; Sampaio,G.P.; Souza,D.F.C.; Inocêncio,L.A.; Lemos,J.A.R.; Brites,C.. |
| This study defined the normal variation range for different subsets of T-lymphocyte cells count in two different Brazilian regions. We analysed the T-lymphocytes subpopulations (CD3+, CD4+, CD8+) in blood donors of two Brazilian cities, located in North (Belem, capital state of Para, indian background) and Northeast (Salvador, capital state od Bahia, African background) regions of Brazil. Results were compared according to gender, stress level (sleep time lower than 8 hours/day), smoking, and alcohol intake. Lymphocytes subpopulations were measured by flow cytometry. Five hundred twenty-six blood donors from two Brazilians cities participated in the study: 450 samples from Bahia and 76 samples from Pará. Most (60%) were men, 59% reported alcohol intake,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CD4; CD8; Blood donors; Reference values; Brazil. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000300013 |
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| Pinheiro,C.A.T.; Souza,L.D.M.; Motta,J.V.S.; Kelbert,E.F.; Souza,M.S.; Martins,C.S.R.; Coelho,F.M.C.; Pinheiro,K.A.T.; Pinheiro,R.T.. |
| Neurocognitive impairment (NCI) is frequently observed in patients infected with human immunodeficiency virus (HIV) and results from the compromise of subcortical brain structures by the virus. The manifestations of NCI range from asymptomatic impairment to dementia. In addition to cognitive impairment resulting from HIV infection, other factors such as depression are associated with the loss of cognitive functions. The aim of this study was to estimate the prevalence of NCI in HIV-positive patients in a city in southern Brazil and to establish possible associations for the prevalence of NCI with HIV-related and other risk factors. This cross-sectional study of HIV-positive outpatients was conducted in a specialized care service in the city of Pelotas in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AIDS; Depression; Neurocognitive; HIV; HAND; CD4. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016001000704 |
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| Sarafova,S.D.; Siu,G.. |
| The control of CD4 gene expression is essential for proper T lymphocyte development. Signals transmitted from the T-cell antigen receptor (TCR) during the thymic selection processes are believed to be linked to the regulation of CD4 gene expression during specific stages of T cell development. Thus, a study of the factors that control CD4 gene expression may lead to further insight into the molecular mechanisms that drive thymic selection. In this review, we discuss the work conducted to date to identify and characterize the cis-acting transcriptional control elements in the CD4 locus and the DNA-binding factors that mediate their function. From these studies, it is becoming clear that the molecular mechanisms controlling CD4 gene expression are very... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CD4; Gene expression; Silencer; T cell; Development. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000700001 |
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