Multiple Sclerosis: II. Effects of Prothymosin Alpha on the Autologous and Allogeneic MLR in Patients with Multiple Sclerosis

Overview

Journal Clin Exp Immunol

Publisher Oxford University Press

Specialty Allergy & Immunology

Date 1987 Nov 1

PMID 2962790

Citations 5

Authors

G J Reclos

C N Baxevanis

C Sfagos

C Papageorgiou

G C Tsokos

M Papamichail

Affiliations

Soon will be listed here.

Abstract

We have recently demonstrated that peripheral blood monocytes from patients with multiple sclerosis (MS) have a defect in stimulating autologous and allogeneic T lymphocytes. This defect was found to correlate with disease activity. In this report we demonstrate that prothymosin alpha (ProT alpha), a rat thymus fraction 5 polypeptide, restores the MS monocyte stimulatory defect. The concentrations of ProT alpha which induced optimal enhancement of the mixed lymphocyte responses (MLR) were significantly higher when monocytes from patients with active disease were used as stimulators than when monocytes from patients with inactive disease were used. T4+ cells tested with autologous stimulatory monocytes harvested from an inactive stage of MS exhibited considerably higher proliferative responses than when stimulated with autologous monocytes obtained from an acute relapse. The decreased autologous proliferation of T4+ cells in MS patients was restored to normal levels after preincubation with ProT alpha in the environment of autologous monocytes. Our results demonstrate that ProT alpha is capable of fully restoring the deficient stimulatory function of MS monocytes and monocyte-associated functional defects of MS-derived T4+ cells.

Citing Articles

Thymosins in multiple sclerosis and its experimental models: moving from basic to clinical application.

Severa M, Zhang J, Giacomini E, Rizzo F, Etna M, Cruciani M Mult Scler Relat Disord. 2018; 27:52-60.

PMID: 30317071 PMC: 7104151. DOI: 10.1016/j.msard.2018.09.035.

Expression of alpha-thymosins in human tissues in normal and abnormal growth.

Tsitsiloni O, Stiakakis J, Koutselinis A, Gogas J, Markopoulos C, Yialouris P Proc Natl Acad Sci U S A. 1993; 90(20):9504-7.

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Induction of lymphokine-activated killer activity in mice by prothymosin alpha.

Baxevanis C, Gritzapis A, Dedoussis G, Papadopoulos N, Tsolas O, Papamichail M Cancer Immunol Immunother. 1994; 38(4):281-6.

PMID: 8168124 PMC: 11038266. DOI: 10.1007/BF01533521.

Prothymosin alpha is not a nuclear polypeptide.

Tsitsiloni O, Yialouris P, Haritos A Experientia. 1989; 45(4):332-4.

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Promotion of murine antitumor activity by prothymosin alpha treatment: I. Induction of tumoricidal peritoneal cells producing high levels of tumour necrosis factor alpha.

Papanastasiou M, Baxevanis C, Papamichail M Cancer Immunol Immunother. 1992; 35(2):145-50.

PMID: 1596938 PMC: 11038346. DOI: 10.1007/BF01741862.

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