This work was supported by grants from the National Multiple Sclerosis Society (RG 2705A1/1 and RG 2705-B-2) and the National Institutes of Health (NS 37821) to P.A.W. We are indebted to Christopher Moore and Temple Bolliger for excellent technical assistance in these studies. We also thank Drs. Robert McGehee and Charlotte Peterson for helpful suggestions regarding these studies and Dr. Lawrence Cornett for the use of the β2-adrenergic receptor-specific oligonucleotides.

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