Sphingomyelin synthase 2 facilitates M2-like macrophage polarization and tumor progression in a mouse model of triple-negative breast cancer.

High infiltration of M2-polarized macrophages in the primary tumor indicates unfavorable prognosis and poor overall survival in the patients with triple-negative breast cancer (TNBC). Thus, reversing M2-polarized tumor-associated macrophages in the tumors has been considered as a potential therapeutic strategy for TNBC. Sphingomyelin synthase 2 (SMS2) is the key enzyme for sphingomyelin production, which plays an important role in plasma membrane integrity and function.

Sphingomyelin synthase 2 over-expression induces expression of aortic inflammatory biomarkers and decreases circulating EPCs in ApoE KO mice.

Aims: This study sought to assess the effect of sphingomyelin synthase 2 (SMS2) over-expression on plaque component and endothelial dysfunction in atherosclerosis.

Main Methods: We generated recombinant adenovirus vectors containing human SMS2 cDNA (AdV-SMS2) or control gene GFP cDNA (AdV-GFP). Both AdVs were injected (i.

Human ApoA-I overexpression diminishes LPS-induced systemic inflammation and multiple organ damage in mice.

Apolipoprotein A-I (ApoA-I) is the major apolipoprotein of high density lipoprotein (HDL). To investigate the protective effect of ApoA-I against lipopolysaccharide (LPS)-induced systemic inflammation and multiple organ damage in mice, we established a human ApoA-I overexpression mouse model using recombinant adenovirus vector (AdV-AI). The histomorphologic analysis showed that AdV-AI administration greatly attenuated LPS-induced acute injury in lung and kidney.

High yield and secretion of recombinant human apolipoprotein AI in Pichia pastoris.

Apolipoprotein AI (ApoAI) is an important apolipoprotein in plasma and is known to have various physiological functions suitable for pharmaceutical applications. Human blood has been the only source of this protein for research and large-scale applications. To obtain large amounts of ApoAI a Pichia pastoris expression system was first used to obtain a high level of expression of secreted, recombinant protein.