More MS news articles for August 2002

Expression and Modulation of IFN-gamma-Inducible Chemokines (IP-10, Mig, and I-TAC) in Human Brain Endothelium and Astrocytes: Possible Relevance for the Immune Invasion of the Central Nervous System and the Pathogenesis of Multiple Sclerosis

J Interferon Cytokine Res 2002 Jun;22(6):631-40
Salmaggi A, Gelati M, Dufour A, Corsini E, Pagano S, Baccalini R, Ferrero E, Scabini S, Silei V, Ciusani E, De Rossi M.
Istituto Nazionale Neurologico "Carlo Besta," I-20133 Milan, Italy.

Multiple sclerosis (MS) is a demyelinating disease of the central nervous system (CNS) mediated by blood-derived immune cells invading the CNS.

This invasion could be determined by chemokines, and their role within the MS-affected brain is still poorly defined.

We investigated the expression by RT-PCR and protein release by ELISA of the interferon-gamma (IFN-gamma)-inducible chemokines in human brain microvascular endothelial cells (HBMECs) and astrocytes.

The monokine induced by IFN-gamma (Mig) behaves as a homing chemokine constitutively expressed in HBMECs and astrocytes, whereas the IFN-gamma-inducible 10-kDa protein (IP-10) and IFN-inducible T cell alpha-chemoattractant (I-TAC) are induced only after inflammatory stimuli.

The biologic activity of IFN-gamma-inducible chemokines from an endothelial source was analyzed, and the transendothelial migration of activated lymphocytes was partly antagonized by specific antibodies, especially anti-Mig antibody.

Our data highlight the capability of cells of the CNS to activate the chemoattractant machinery in a proinflammatory environment and in MS.