Dataset Information

Population specific reference ranges of CD3, CD4 and CD8 lymphocyte subsets among healthy Kenyans.

ABSTRACT: BACKGROUND: The enumeration of absolute CD4 counts is of primary importance for many medical conditions especially HIV infection where therapeutic initiation depends on the count. These ranges tend to vary across populations. However, these ranges have not been comprehensively established in the Kenyan population. Therefore, this study aimed at establishing the reference ranges for the CD4 and CD8 T-lymphocytes in normal healthy individuals in Kenya. METHODS: A total of 315 individuals of the ages between 16 and 60 years old, in 5 different regions of the country, were recruited into the study. They were screened for diseases that potentially cause lymphocyte homeostasis perturbation. CD4/CD8 Counts were performed by use of a FACSCalibur flow cytometer (Becton-Dickinson, NJ) equipped with automated acquisition and analysis software. Results were analysed according to age, sex and region. RESULTS: Results were presented as means and ranges (in parenthesis) generated non parametrically as 2.5 and 97.5 percentiles as follows; In general population; CD3 1655 (614-2685 cells/?L ), CD4 920 (343-1493 cells/?L), and CD8 646 (187-1139 cells/?L), while according to sex, females; CD3 1787 (697-2841 cells/?L), CD4 1010 (422-1572 cells/?L), CD8 659 (187-1180 cells/?L); males; CD3 1610 (581-2641 cells/?L), CD4 889(320-1459 cells/?L) and CD8 644 (185-1140 cells/?L). The general reference ranges for CD4/CD8 ratios were as follows; general population 1.57(0.50-2.74), males 1.51(0.49-2.64) and females 1.69(0.55-2.95). CONCLUSION: The lymphocyte reference ranges for the Kenyan population are fairly comparable to those established in other African populations. The ranges also differ appreciably from those established in Germany, Italy and Switzerland. Furthermore, the study reported significant differences in the ranges of different population clusters within Kenya, as well us between males and females.

SUBMITTER: Bosire EM

PROVIDER: S-EPMC3827884 | biostudies-other | 2013

REPOSITORIES: biostudies-other

ACCESS DATA

Publications

Population specific reference ranges of CD3, CD4 and CD8 lymphocyte subsets among healthy Kenyans.

Bosire Erick M EM Nyamache Anthony K AK Gicheru Michael M MM Khamadi Samoel A SA Lihana Raphael W RW Okoth Vincent V

AIDS research and therapy 20131107 1

<h4>Background</h4>The enumeration of absolute CD4 counts is of primary importance for many medical conditions especially HIV infection where therapeutic initiation depends on the count. These ranges tend to vary across populations. However, these ranges have not been comprehensively established in the Kenyan population. Therefore, this study aimed at establishing the reference ranges for the CD4 and CD8 T-lymphocytes in normal healthy individuals in Kenya.<h4>Methods</h4>A total of 315 individu ...[more]

PMID: 24199645

Similar Datasets

Project description:Establishing national population haematological and immunological reference ranges are essential for clinical management of patients. However, there is scarcity of information on community based haematological reference ranges established from Ethiopian population. Therefore, this study aimed at determining haematological and CD4+ T cells reference ranges in healthy adults from East and West Gojjam zones, Ethiopia.Community based cross-sectional study was conducted from May 2015 to December 2015 in healthy adult residents of Gojjam zone. A total of 481(246 females and 235 males) healthy adults enrolled in the study. Healthy adults were defined by medical history, physical examination and laboratory screening for HIV, HBV, HCV and intestinal parasitosis. Haematological parameters were measured using haematology analyzer MindrayBC320 (Mindray Biomedical electronic Corporation, China). CD4+Tcells were enumerated using FACS count (Becton Dickinson).The median age of the participants was 25 years. The overall median and 95th percentile of CD4+ T cells count were 869 cells/mm3 and396-1598 cells/mm3, respectively. Females had a significantly higher CD4+ T cell counts compared to males (P = 0.002). The 95th percentile range for red blood cells (RBCs) was 3.93-6.1 x 106cells/mm3and for hematocrit (Hct) was 40-58% while for hemoglobin (Hb) was 15.69-17.84g/dl. Males had significantly higher values of RBC and Hct than females (P < 0.001). Females (120-379 x 106 cells/mm3) had significantly higher platelet counts than males (106-352 x106 cells/mm3) (P < 0.001). The overall median of WBC was6.78 x103/mm3and its95thpercentile range was3.5-11.5 x103/mm3. The overall 95th percentile range of MCV, MCH and MCHC were 89.5-107.5 fl, 28-34 pg and 30-33.2g/dl, respectively. The higher mean absolute count of RBCs was found in the youngest age groups (P = 0.03). The mean count of RBCs and Hct were significantly higher in highschool completed and above than other participants (P < 0.001). The lower and upper limit of platelet counts was significantly higher in highland (118 -383x106 cells/mm3) compared to lowland residents (107-352 x106 cells/mm3) (P < 0.001). Moreover, it was significantly higher in residents with better monthly income (124-383 x106 cells/mm3) compared to the counters (115-368 x106 cells/mm3) (P = 0.02).Some of the haematological and CD4+ T cells reference ranges of the healthy adults in this study showed variations with the reference ranges used and reported so far in Ethiopia, Africa and Western countries. We recommend further study considering gender, altitude, and residency in other parts of Ethiopia to establish national reference ranges for Ethiopian population.

Project description:BackgroundImmunophenotyping of blood lymphocytes is an essential tool to evaluate the immune function of patients with immunodeficiency or autoimmunity. Predominately identified CD4+T cell subsets, Th1, Th2, Th17, as well as regulatory T (Treg) cells, play crucial roles in several immunological and pathological conditions. Considering the variations in cell counts among populations and ethnicities, specific CD4+T cell subset reference values need to be locally established to enable meaningful comparisons and accurate data interpretation in clinical and research settings. Therefore, the aim of this study was to establish distributions and reference ranges for blood CD4+T cell subpopulations in age- and sex-balanced healthy adults of a Han Chinese population in Shanxi Province, North China.MethodsPeripheral blood CD4+T cell subsets were examined in 150 healthy volunteers (75 males, 75 females) aged 20-70 years with a four-color FACSCalibur flow cytometer.ResultsReference value percentages (absolute counts, cells/μl) were defined as 95% of the population for cell types as follows: CD4+T, 23.78-51.07 (360-1127); Th1, 0.43-39.62 (2.64-276.21); Th2, 0.27-3.57 (1.80-27.14); Th17, 0.22-2.62 (1.10-19.54); and Treg, 2.17-7.94 (13.47-64.58). The ranges for the Th1:Th2 and Th17:Treg ratios were 0.59-52.37 and 0.04-0.76, respectively. Notably, a significant increase was observed in the values of Treg cells in older individuals, and the numbers of Treg cells in females also tended to decrease when compared to those in males. Therefore, we established the distribution and reference range of CD4+T cell subsets based on age and sex, demonstrating the lowest values of Treg cells in younger females.ConclusionsCollectively, our data provide population-, age-, and sex-specific distributions and reference ranges of circulating CD4+T cell subpopulations, which can be adopted to guide clinical decisions and interpretation of immunophenotyping data in the Han Chinese population in Taiyuan, Shanxi Province, China. In addition, the low expression of peripheral Treg cells in younger females may be associated with the predisposition of females to autoimmune diseases.

Dataset Information

Population specific reference ranges of CD3, CD4 and CD8 lymphocyte subsets among healthy Kenyans.

Publications

Population specific reference ranges of CD3, CD4 and CD8 lymphocyte subsets among healthy Kenyans.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets