ABSTRACT
<p><b>OBJECTIVE</b>To observe effect of oral scorpio and scolopendra powder on T-cell subsets in peripheral blood and intestine from rats with collagen induced arthritis (CIA).</p><p><b>METHOD</b>60 rats were randomly divided into 6 groups: normal control group, model control group, low-dose scorpio and scolopendra group, middle-dose scorpio and scolopendra group, high-dose scorpio and scolopendra group, and type II collagen group. Rat's rheumatoid arthritis was induced by collagen II (C II). Level of T-cell subsets from peripheral blood and intestine was measured by flow cytometry.</p><p><b>RESULT</b>CD4+ T cellular level was obviously increased (P < 0.05 or P < 0.01) or kept increased tendency in peripheral blood and intestine from the model group compared with that of the normal group, while the ratio of CD4+/CD8+ in intestine was obviously descent but the contrary in peripheral blood (P < 0.05 or P < 0.01). CD4+, CD8+ T cellular level in intestine were obviously descent and the ratio of CD4+ /CD8+ increased in all treated groups when compared with in the model group (P < 0.05 or P < 0.01). However, CD4+ T cellular level and the ratio of CD4+/CD8+ in peripheral blood were remarkablely decreased.</p><p><b>CONCLUSION</b>The mechanism that scorpio and scolopendra could treat rat's rheumatoid arthritis may be regulating balance of T-lymphocyte subsets in peripheral blood and intestine.</p>