Expression of TNF-alpha mRNA by peripheral blood mononuclear cells of multiple sclerosis patients treated with IFN-beta 1A.

Abstract:

:The aim of the present study was to verify the expression of tumour necrosis factor (TNF)-alpha mRNA by semiquantitative reverse transcriptase-polymerase chain reaction (RT-PCR) in unstimulated peripheral blood mononuclear cells (MNCs) of 15 relapsing-remitting multiple sclerosis (MS) patients who underwent treatment with IFN-beta 1a (6 millions of international units (MIU) i.m. once a week) and in 15 untreated MS patients matched for age and expanded disability status score (EDSS). At the same time the expression of TNF-alpha mRNA was assessed in 10 healthy age-matched control subjects. All MS patients were assessed at the basal time and after 6 months. At the basal time, the band of TNF-alpha mRNA was detectable in 12 out of the 15 untreated patients and in 13 out of the 15 patients who underwent IFN-beta 1a treatment. The higher TNF-alpha mRNA was evident in patients with gadolinium-enhancing lesions. At the 6-month follow-up, 13 out of the 15 untreated patients still had detectable values of TNF-alpha mRNA and no significant difference emerged when compared with basal time. On the contrary, the expression of TNF-alpha mRNA was absent at the same time in nine out of the 15 patients treated with IFN-beta 1a. A longitudinal analysis carried out monthly in eight MS patients (four untreated and four treated) revealed a transient increase in TNF-alpha mRNA expression in MNCs of all four treated patients in the first 3 months, supporting previous findings of an early immunoenhancing effect of IFN-beta 1a. This early activation is followed by an inhibitory effect of IFN-beta 1a on TNF-alpha mRNA expression in about 2/3 of treated MS patients when assessed at 6 months. Further long-term studies are needed to confirm this immunomodulatory effect of IFN-beta 1a not only on TNF-alpha but also on other cytokines of Th(1)and Th(2)types.

journal_name

Cytokine

journal_title

Cytokine

authors

Sarchielli P,Critelli A,Greco L,Sokola E,Floridi A,Gallai V

doi

10.1006/cyto.2001.0881

keywords:

subject

Has Abstract

pub_date

2001-06-07 00:00:00

pages

294-8

issue

5

eissn

1043-4666

issn

1096-0023

pii

S1043-4666(01)90881-6

journal_volume

14

pub_type

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