AIM: To explore the effect and mechanism of betaine on macrophage polarization in the development of liver cirrhosis in rats. METHODS: Forty-eight male SD rats were randomly divided into normal control group( N),normal control plus betaine-treated group( NB), liver cirrhosis group( M), liver cirrhosis plus betaine-treated group( MB). At the 6th and 8th weeks,liver cirrhosis in rats was induced by multiple pathogenic factors. Betaine was given in rats of NB and MB groups( 1g · kg~(-1)· d~(-1),ig). Levels of ...