Hain n-3 PUFA receptor both in vitro and in vivo, and

Hain n-3 PUFA receptor both in vitro and in vivo, and hypothesized that reduced GPR120 activity can be an important factor for tissue inflammation, insulin resistance and obesity. GPR120 receptor expression is upregulated in order EW-7197 pro-inflammatory bone marrow derived CD11C+ macrophages, monocytic macrophage cells, adipose tissue and mature adipocytes. In GPR120 receptor-positive cells, DHA strongly inhibited lipopolysaccharideinduced phosphorylation of JNK and IKK, degradation of IB protein, secretion of proinflammatory cytokines and expression of inflammation-related genes. The inhibitory effects of DHA were completely abolished by knocking down the GPR120 gene, indicating that the anti-inflammatory effects of DHA were specifically modulated through the GPR120 receptor. Toll-like receptors, a family of transmembrane BioPQQ glycoprotein receptors, play an important role in the innate immune system. TLR expression is upregulated in the microenvironment of many types of tumors, including breast, prostate, lung, pancreatic, and liver cancer. TLRs activate the production of many inflammation-related cytokines via a signaling cascade. These cytokines then associate with components of the adaptive immune system to destroy intruders. Among the TLR family, TLR4 and TLR9 have been reported to be associated with prostate cancer, while TLR3 can induce human prostate Author Manuscript Author Manuscript Author Manuscript Author Manuscript Curr Pharmacol Rep. Author manuscript; available in PMC 2016 October 01. Gu et al. Page 7 cancer cell apoptosis through a PKC-alpha-dependent mechanism. Huang et al. suggested that saturated fatty acids promoted TLR2 and TLR4 mediated pro-inflammatory activity in a cell based system, while DHA suppressed such TLA receptor mediated activity. Syndecan-1 is another cell membrane protein which can be functionally modulated by n-3 PUFAs. SDC-1 protein functions as an integral membrane protein and participates in recruitment of leukocytes in non-infectious inflammatory diseases, inhibition of inflammation by attenuating heparin sulfate chain-binding pro-inflammatory factors, and remodeling of injured cardiac tissues. Hu and colleagues found that n-3 PUFA-induced prostate cancer cell apoptosis occurred through modulation of SDC-1 expression, followed by down-regulation of PDPK1/AKT/Bad phosphorylation. Loss of cell surface expression of SDC-1, as seen in many cancers such as colorectal and skin cancer, triggers metastatic transformation in cancer cells. Our own studies have found that in contrast to normal prostate epithelial cells and androgen independent PC3 and DU145 cells, SDC-1 protein expression was down-regulated in prostate cancer cell lines and androgen-dependent LNCaP cells. In a Pten-null mouse prostate cancer model, we have also found that inhibition of prostate cancer growth by dietary n-3 PUFAs was associated with an increased expression of SDC-1 protein. Hepatocellular carcinoma is primarily a consequence of long-term chronic liver inflammatory diseases of various origins. Weylandt et al. used the fat-1 transgenic mouse model, which endogenously converts n-6 PUFAs to n-3 PUFAs, to analyze the effect of n-3 PUFAs on liver cancer formation in chemical carcinogen induced tumors in vivo. By comparing the size and number of surface-visible tumors in the liver, they found that increases in n-3 PUFA levels in tissues resulted in a decrease in tumor formation. They also found that inflammation-related markers, PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/19850718,22102576 such as liver COX.Hain n-3 PUFA receptor both in vitro and in vivo, and hypothesized that reduced GPR120 activity can be an important factor for tissue inflammation, insulin resistance and obesity. GPR120 receptor expression is upregulated in pro-inflammatory bone marrow derived CD11C+ macrophages, monocytic macrophage cells, adipose tissue and mature adipocytes. In GPR120 receptor-positive cells, DHA strongly inhibited lipopolysaccharideinduced phosphorylation of JNK and IKK, degradation of IB protein, secretion of proinflammatory cytokines and expression of inflammation-related genes. The inhibitory effects of DHA were completely abolished by knocking down the GPR120 gene, indicating that the anti-inflammatory effects of DHA were specifically modulated through the GPR120 receptor. Toll-like receptors, a family of transmembrane glycoprotein receptors, play an important role in the innate immune system. TLR expression is upregulated in the microenvironment of many types of tumors, including breast, prostate, lung, pancreatic, and liver cancer. TLRs activate the production of many inflammation-related cytokines via a signaling cascade. These cytokines then associate with components of the adaptive immune system to destroy intruders. Among the TLR family, TLR4 and TLR9 have been reported to be associated with prostate cancer, while TLR3 can induce human prostate Author Manuscript Author Manuscript Author Manuscript Author Manuscript Curr Pharmacol Rep. Author manuscript; available in PMC 2016 October 01. Gu et al. Page 7 cancer cell apoptosis through a PKC-alpha-dependent mechanism. Huang et al. suggested that saturated fatty acids promoted TLR2 and TLR4 mediated pro-inflammatory activity in a cell based system, while DHA suppressed such TLA receptor mediated activity. Syndecan-1 is another cell membrane protein which can be functionally modulated by n-3 PUFAs. SDC-1 protein functions as an integral membrane protein and participates in recruitment of leukocytes in non-infectious inflammatory diseases, inhibition of inflammation by attenuating heparin sulfate chain-binding pro-inflammatory factors, and remodeling of injured cardiac tissues. Hu and colleagues found that n-3 PUFA-induced prostate cancer cell apoptosis occurred through modulation of SDC-1 expression, followed by down-regulation of PDPK1/AKT/Bad phosphorylation. Loss of cell surface expression of SDC-1, as seen in many cancers such as colorectal and skin cancer, triggers metastatic transformation in cancer cells. Our own studies have found that in contrast to normal prostate epithelial cells and androgen independent PC3 and DU145 cells, SDC-1 protein expression was down-regulated in prostate cancer cell lines and androgen-dependent LNCaP cells. In a Pten-null mouse prostate cancer model, we have also found that inhibition of prostate cancer growth by dietary n-3 PUFAs was associated with an increased expression of SDC-1 protein. Hepatocellular carcinoma is primarily a consequence of long-term chronic liver inflammatory diseases of various origins. Weylandt et al. used the fat-1 transgenic mouse model, which endogenously converts n-6 PUFAs to n-3 PUFAs, to analyze the effect of n-3 PUFAs on liver cancer formation in chemical carcinogen induced tumors in vivo. By comparing the size and number of surface-visible tumors in the liver, they found that increases in n-3 PUFA levels in tissues resulted in a decrease in tumor formation. They also found that inflammation-related markers, PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/19850718,22102576 such as liver COX.