1 August 2002
Multiple Sclerosis, vol. 8, no. 4, pp. 284-288(5)
Ensoli F; Fiorelli V; Lugaresi A; Farina D; De Cristofaro M; Collacchi B; Santini Muratori D; Scala E; Di Gioacchino M; Paganelli R; Aiuti F
 Department of Clinical Medicine, Allergy and Immunology University of Rome "La Sapienza", Rome 00185, Italy  Department of Oncology and Neuroscience, University "Gabriele d"Annunzio", Chieti I-66013, Italy
Proinflammatory cytokines are deemed to play a pivotal role in the pathogenesis of multiple sclerosis (MS).
They provide signals for T-cell activation and inflammatory cell recruitment in the brain and might directly alter neuroglial and neuronal cell survival and function.
We found that peripheral blood mononuclear cells (PBMCs) from MS patients spontaneously produce high levels of TNFa , TNFb , IFNg, and oncostatin M (oncM), a proinflammatory cytokine acting on cells of neural, vascular, hematopoietic, and lymphoid origin.
Spontaneous production of these cytokines was significantly higher (p<0.01) in PBMC short-term culture supernatants from MS patients than in blood donors (HC).
On average, lectin-induced production of these cytokines by PBMC was higher in MS patients than in HC, significantly so only for TNFa (p=0.013).
Determination of TNFa, TNFb, IFNg, and oncM in corresponding sera showed that, on average, oncM levels were higher in MS patients than in HC, though the results were not statistically significant, whereas levels of TNFa, TNFb, and IFNg were below the assay threshold in most patients.
The finding that MS PBMCs are primed in vivo to produce and release
high levels of proinflammatory cytokines suggests the presence of a basal
activation of the immune system which, in turn, may play a role in the
complex circuitry of molecular and cellular interactions responsible for
neurologic damage in MS.
© 2002 ingenta