In the article, "Evaluation of lymphocyte levels in a random sample of 218 elderly individuals from São Paulo city" by Teixeira et al., (1) the authors measured percentages of CD4, CD8 and CD19 in blood from a population of 218 randomly selected elderly individuals of both genders aged between 60 and 101 years from Sao Paulo, Brazil. Participants were grouped according to their ages. Results sh...

Lymphocyte transformation to phytohaemagglutinin (PHA) was measured simultaneously by two methods (heparin and methyl cellulose) in 16 patients with non-lymphoid cancer and 21 normal subjects. Twelve cancer patients showed transformation levels below the normal heparin range, but only two patients showed levels below the normal methyl cellulose range. These findings suggest that in interpreting...

Abstract Long-term immunity against infections and effective response to vaccination are dependent on unique feature of lymphocytes referred as “memory generation”. Majority our understanding is established murine data human naive memory differentiation limited. In ongoing study we explored epigenetics (DNA methylation accessible chromatin), transcriptomics (basal, activation proliferation indu...

Lymphocyte transformation to phytohaemagglutinin (PHA) was measured simultaneously by two methods (heparin and methyl cellulose) in 16 patients with non-lymphoid cancer and 21 normal subjects. Twelve cancer patients showed transformation levels below the normal heparin range, but only two patients showed levels below the normal methyl cellulose range. These findings suggest that in interpreting...

Lymphocyte function in rheumatoid arthritis has been assessed by the mixed lymphocyte culture assay. In contrast to previous studies, no difference was found between lymphocytes from healthy volunteers and patients with rheumatoid arthritis. An occasional patient's lymphocytes failed to respond on a given day, but were normal on restudy. All 44 arthritic patient's lymphocytes underwent blast tr...

Distribution and modulation of rabbit lymphocyte phytohaemagglutinin acceptors and concanavalin A acceptors during activation of rabbit lymphocytes have been examined by electron microscopy. Two types of cell surface acceptors have been tentatively identified, lectin binding acceptors that do not modulate, and receptors that are endocytosed when blast transformation is stimulated. All of the ce...

CD31 (PECAM-1) is an immunoglobulin gene superfamily cell adhesion molecule found on vascular endothelium, platelets, and leukocytes. Lymphocyte expression of CD31 is most closely associated with the CD45RA+CD8+ naive T phenotype. CD31 has recently been shown to play a role in leukocyte egress to inflammatory sites. The mechanism of CD31 adhesion remains under investigation. Several investigato...

The possibility that the two complementing alpha- and beta-Ir-GLphi genes are independently responsible for controlling events in T lymphocytes and B lymphocytes, respectively, has been tested in double adoptive transfer experiments utilizing cells from appropriate inbred strains of mice. The results of these studies show that the functions of T lymphocytes and B lymphocytes and the cooperative...

background: microrna-155 (mir-155) is upregulated during t cell activation, but the exact mechanisms by which it influences cd4+ t cell activation remain unclear. objective: to examine whether the b and t lymphocyte attenuator (btla) is a target of mir-155 during naïve cd4+ t cell activation. methods: firefly luciferase reporter plasmids pezx-mt01-wild-type-btla and pezx-mt01-mutant-btla were c...

The proliferative response is most frequently determined by estimating the amount of [(3)H]thymidine incorporated into newly synthesized DNA. The [(3)H]thymidine procedure requires the use of radioisotopes as well as lengthy periods of incubation (>72 h). An alternative method of assessing T-lymphocyte activation in whole-blood cultures involves the measurement of the nucleotide ATP instead of ...