Stimulation of AIDS lymphocytes with calcium ionophore (A23187) and phorbol ester (PMA): studies of cytoplasmic free Ca, IL-2 receptor expression, IL-2 production, and proliferation

B Hofmann; J Moller; E Langhoff; K D Jakobsen; N Odum; E Dickmeiss; L P Ryder; O Thastrup; O Scharff; B Foder; Niels Ødum

Stimulation of AIDS lymphocytes with calcium ionophore (A23187) and phorbol ester (PMA): studies of cytoplasmic free Ca, IL-2 receptor expression, IL-2 production, and proliferation

B Hofmann, J Moller, E Langhoff, K D Jakobsen, N Odum, E Dickmeiss, L P Ryder, O Thastrup, O Scharff, B Foder, Niels Ødum

Cellebiologi og Fysiologi

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

30 Citationer (Scopus)

Abstract

Udgivelsesdato: 1989-Mar

Originalsprog	Engelsk
Tidsskrift	Cellular Immunology
Vol/bind	119
Udgave nummer	1
Sider (fra-til)	14-21
Antal sider	7
ISSN	0008-8749
Status	Udgivet - 1989

Bibliografisk note

Keywords: Acquired Immunodeficiency Syndrome; Calcimycin; Calcium; Cytoplasm; Humans; Interleukin-2; Lymphocyte Activation; Lymphocytes; Male; Receptors, Interleukin-2; Tetradecanoylphorbol Acetate

Citationsformater

Hofmann, B., Moller, J., Langhoff, E., Jakobsen, K. D., Odum, N., Dickmeiss, E., Ryder, L. P., Thastrup, O., Scharff, O., Foder, B., & Ødum, N. (1989). Stimulation of AIDS lymphocytes with calcium ionophore (A23187) and phorbol ester (PMA): studies of cytoplasmic free Ca, IL-2 receptor expression, IL-2 production, and proliferation. Cellular Immunology, 119(1), 14-21.

@article{b0350690fda111ddb219000ea68e967b,

title = "Stimulation of AIDS lymphocytes with calcium ionophore (A23187) and phorbol ester (PMA): studies of cytoplasmic free Ca, IL-2 receptor expression, IL-2 production, and proliferation",

abstract = "We have studied whether the decreased lymphocyte proliferative responses of AIDS lymphocytes to stimulation by mitogens and antigens may be overcome when challenged with a combination of calcium ionophore A23187 and phorbol ester PMA. Comparison of the proliferative response of lymphocytes from nine patients with AIDS with the response of lymphocytes from nine control subjects showed that the response of AIDS lymphocytes was severely decreased when stimulated with PHA and no further response could be achieved by stimulation with A23187/PMA. On the other hand, no significant difference between the PHA-induced rise of cytoplasmic free calcium concentration ([Ca2+]1) in normal and AIDS lymphocytes was observed. The percentage of cells expressing IL-2 receptors (CD25) was also normal both after addition of PHA and after addition of A23187/PMA and the expression was normal on both CD4 and CD8 cells. The production of IL-2 in normal lymphocytes stimulated with A23187/PMA was 33 times higher than that after stimulation with PHA. In AIDS lymphocytes the production of IL-2 induced by all activators was severely decreased compared to control subjects, although the production of IL-2 after stimulation with A23187/PMA was higher than that in control lymphocytes after stimulation with PHA. The present study shows that a direct activation of protein kinase C combined with mobilization of cytoplasmic calcium does not overcome the lymphocyte proliferative deficiency of AIDS lymphocytes.",

author = "B Hofmann and J Moller and E Langhoff and Jakobsen, {K D} and N Odum and E Dickmeiss and Ryder, {L P} and O Thastrup and O Scharff and B Foder and Niels {\O}dum",

note = "Keywords: Acquired Immunodeficiency Syndrome; Calcimycin; Calcium; Cytoplasm; Humans; Interleukin-2; Lymphocyte Activation; Lymphocytes; Male; Receptors, Interleukin-2; Tetradecanoylphorbol Acetate",

year = "1989",

language = "English",

volume = "119",

pages = "14--21",

journal = "Cellular Immunology",

issn = "0008-8749",

publisher = "Academic Press",

number = "1",

}

TY - JOUR

T1 - Stimulation of AIDS lymphocytes with calcium ionophore (A23187) and phorbol ester (PMA): studies of cytoplasmic free Ca, IL-2 receptor expression, IL-2 production, and proliferation

AU - Hofmann, B

AU - Moller, J

AU - Langhoff, E

AU - Jakobsen, K D

AU - Odum, N

AU - Dickmeiss, E

AU - Ryder, L P

AU - Thastrup, O

AU - Scharff, O

AU - Foder, B

AU - Ødum, Niels

N1 - Keywords: Acquired Immunodeficiency Syndrome; Calcimycin; Calcium; Cytoplasm; Humans; Interleukin-2; Lymphocyte Activation; Lymphocytes; Male; Receptors, Interleukin-2; Tetradecanoylphorbol Acetate

PY - 1989

Y1 - 1989

N2 - We have studied whether the decreased lymphocyte proliferative responses of AIDS lymphocytes to stimulation by mitogens and antigens may be overcome when challenged with a combination of calcium ionophore A23187 and phorbol ester PMA. Comparison of the proliferative response of lymphocytes from nine patients with AIDS with the response of lymphocytes from nine control subjects showed that the response of AIDS lymphocytes was severely decreased when stimulated with PHA and no further response could be achieved by stimulation with A23187/PMA. On the other hand, no significant difference between the PHA-induced rise of cytoplasmic free calcium concentration ([Ca2+]1) in normal and AIDS lymphocytes was observed. The percentage of cells expressing IL-2 receptors (CD25) was also normal both after addition of PHA and after addition of A23187/PMA and the expression was normal on both CD4 and CD8 cells. The production of IL-2 in normal lymphocytes stimulated with A23187/PMA was 33 times higher than that after stimulation with PHA. In AIDS lymphocytes the production of IL-2 induced by all activators was severely decreased compared to control subjects, although the production of IL-2 after stimulation with A23187/PMA was higher than that in control lymphocytes after stimulation with PHA. The present study shows that a direct activation of protein kinase C combined with mobilization of cytoplasmic calcium does not overcome the lymphocyte proliferative deficiency of AIDS lymphocytes.

AB - We have studied whether the decreased lymphocyte proliferative responses of AIDS lymphocytes to stimulation by mitogens and antigens may be overcome when challenged with a combination of calcium ionophore A23187 and phorbol ester PMA. Comparison of the proliferative response of lymphocytes from nine patients with AIDS with the response of lymphocytes from nine control subjects showed that the response of AIDS lymphocytes was severely decreased when stimulated with PHA and no further response could be achieved by stimulation with A23187/PMA. On the other hand, no significant difference between the PHA-induced rise of cytoplasmic free calcium concentration ([Ca2+]1) in normal and AIDS lymphocytes was observed. The percentage of cells expressing IL-2 receptors (CD25) was also normal both after addition of PHA and after addition of A23187/PMA and the expression was normal on both CD4 and CD8 cells. The production of IL-2 in normal lymphocytes stimulated with A23187/PMA was 33 times higher than that after stimulation with PHA. In AIDS lymphocytes the production of IL-2 induced by all activators was severely decreased compared to control subjects, although the production of IL-2 after stimulation with A23187/PMA was higher than that in control lymphocytes after stimulation with PHA. The present study shows that a direct activation of protein kinase C combined with mobilization of cytoplasmic calcium does not overcome the lymphocyte proliferative deficiency of AIDS lymphocytes.

M3 - Journal article

C2 - 2493338

SN - 0008-8749

VL - 119

SP - 14

EP - 21

JO - Cellular Immunology

JF - Cellular Immunology

IS - 1

ER -