Efficacy of 6-chloro-2',3'-dideoxyguanosine (6-Cl-ddG) on an ARC/AIDS Rhesus macaque (Macaca mulatta) Infected with Simian Immunodeficiency Virus

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The efficacy of 6-chloro-2,3-dideoxyguanosine (6-Cl-ddG) was investigated in vivo by using a male ARC/AIDS rhesus macaque infected with simian immunodeficiency virus (SIVmac251/32H). He was administered subcutaneously 6-Cl-ddG (50 mg/kg B.W.) every 8 hr for 14 days when he showed clinical features of recurrent weight loss, severe diarrhea and neuropathy. The number of CD4+, CD8+ cells and total T cells increased rapidly after administration of 6-Cl-ddG and a high level was maintained for 2 months, but the B cell count decreased during the treatment. The antibody titer to SIV did not change significantly during or after the treatment, but the virus load in the plasma measured by RT-PCR dropped to one-third at the start of the 6-Cl-ddG treatment. Within 3 days after the start of 6-Cl-ddG administration, he began to show recovery in clinical signs including weight increase, and disappearance of diarrhea and neuropathy. These findings suggested that 6-Cl-ddG was effective at the stage of ARC/AIDS in a rhesus monkey infected with SIV.
社団法人　日本実験動物学会の論文