Intestinal fibrosis is a significant clinical challenge in inflammatory bowel diseases, but no effective anti-fibrotic therapy is currently available. Glucagon receptor (GCGR) and glucagon-like peptide 1 receptor (GLP1R) are both peptide hormone receptors involved in energy metabolism of epithelial cells. However, their role in intestinal fibrosis and the underlying mechanisms remain largely unexplored. Herein GCGR and GLP1R were found to be reduced in the stenotic ileum of patients with Crohn's disease as well as in the fibrotic colon of mice with chronic colitis. The downregulation of GCGR and GLP1R led to the accumulation of the metabolic byproduct lactate, resulting in histone H3K9 lactylation and exacerbated intestinal fibrosis through epithelial-to-mesenchymal transition (EMT). Dual activating GCGR and GLP1R by peptide 1907B reduced the H3K9 lactylation in epithelial cells and ameliorated intestinal fibrosis in vivo. We uncovered the role of GCGR/GLP1R in regulating EMT involved in intestinal fibrosis via histone lactylation. Simultaneously activating GCGR/GLP1R with the novel dual agonist peptide 1907B holds promise as a treatment strategy for alleviating intestinal fibrosis.

Objective:To evaluate the value of the skeletal muscle index (SMI) and psoas major muscle index(PMI) measured at the third lumbar vertebra(L3) level in the evaluation on nutritional status and prognosis of cirrhosis patients with ascites.Methods:The clinical data of 102 patients with cirrhosis and ascites treated in our department between September 2018 and September 2022 was analyzed retrospectively, the skeletal muscle and psoas muscle area at L3 level were measured, and L3-SMI and L3-PMI were calculated. According to L3-SMI, patients were divided into the sarcopenia group (62 cases) and the normal muscle mass group (40 cases). Differences between the two groups were compared in terms of L3-SMI, L3-PMI, body mass index (BMI), albumin, the rate of re-admissions and mortality during follow-up. The value of each index in nutritional assessment was also explored.Results:L3-SMI, L3-PMI, and albumin in the sarcopenia group were significantly lower than those in the normal muscle mass group, with statistical significance ( P<0.01).The BMI of the sarcopenia group was lower than that of the normal muscle mass group, but the difference was not significant ( P>0.05). L3-PMI showed better performance in nutritional assessment compared with albumin and BMI. The rate of re-admissions and the mortality rate in the sarcopenia group during the follow-up period were significantly higher compared with the normal muscle mass group ( P<0.05). Conclusion:L3-SMI and L3-PMI can effectively reflect the nutritional status of cirrhosis patients with ascites, and are promising indicators for prognosis prediction in cirrhosis patients with ascites.

The antimicrobial peptide APKGVQGPNG (named YD), a natural peptide originating from Bacillus amyloliquefaciens CBSYD1, exhibited excellent antibacterial and antioxidant properties in vitro. These characteristics are closely related to inflammatory responses which is the central trigger for liver fibrosis. However, the therapeutic effects of YD against hepatic fibrosis and the underlying mechanisms are rarely studied. In this study, we show that YD improved liver function and inhibited the progression of liver fibrosis by measuring the serum transaminase activity and the expression of α-smooth muscle actin and collagen I in carbon tetrachloride-induced mice. Then we found that YD inhibited the level of miR-155, which plays an important role in inflammation and liver fibrosis. Bioinformatics analysis and luciferase reporter assay indicate that Casp12 is a new target of miR-155. We demonstrate that YD significantly decreases the contents of inflammatory cytokines and suppresses the NF-κB signaling pathway. Further studies show that transfection of the miR-155 mimic in RAW264.7 cells partially reversed the YD-mediated CASP12 upregulation, the downregulated levels of inflammatory cytokines, and the inactivation of the NF-κB pathways. Collectively, our study indicates that YD reduces inflammation through the miR-155–Casp12–NF-κB axis during liver fibrosis and provides a promising therapeutic candidate for hepatic fibrosis.

Objective This study aims to investigate the effects of high-fat diet rich in perilla oil on the expression of key genes that regulate hepatic VLDL synthesis in obese rats .Methods Sixty healthy male 5-week old SD rats were randomly divided into 2 groups.The rats in the normal control group (NC, n=12) were given normal diet, and the rats in the high fat group ( HF, n=48) were given a pure high fat diet in order to induce rat models of obesity .In the intervention period, the obesity model rats were randomly divided into 4 subgroups including consistent high fat group (CHF) and three intervention groups depending on perilla oil substitution rate of lard in CHF:20%PO, 50%PO and 100%PO.The serum triglyceride (TG) of the rats was measured after 4 weeks.Real-time PCR was applied to measure microsomal triglyceride transfer protein ( Mtp) and apolipoprotein B ( Apob) mRNA, and western blot assay was used for detecting the expression of MTP and APOB in the liver .Results Compared with the NC group , the CHF rats exhibited significantly high fat deposi-tion.The serum TG was markedly higher and the MTP and APOB were decreased at gene and protein levels in the CHF group compared with the NC group .After the intervention , PO remarkably reduced the level of serum TG and decreased he-patic fat deposition as it showed by pathological examination .At the gene and protein levels , MTP and APOB were upregu-lated by PO to different degrees .Conclusions All the three PO intervention can promote VLDL synthesis and secretion , and decrease the hepatic fat deposition in the obese rats .Furthermore , PO upregulates the expression of MTP at gene and protein levels in a dose-dependent manner .

Objective This study aims to investigate the effects of high-fat diet rich in perilla oil on the insulin sensitivity-related gene expression in skeletal muscle in insulin resistant rats.Methods The insulin resistant ( IR) rat models were randomly divided into 2 groups, including high fat group ( HF) and perilla oil ( PO) intervention group fed with 20%substitution of lard energy in the HF.The insulin sensitivity of rats was measured after 4 weeks.Theα-linolenic acid ( ALA) content of PO in the rat plasma were analyzed by gas chromatograph.Real-time PCR was applied to measure glucose transporter 4 ( GLUT4 ) and insulin receptor substrate-1 ( IRS-1 ) mRNA, and Western blot assay was used for detecting the expression of GLUT4 and IRS-1 in the skeletal muscle.Results At the gene and protein levels, PO remarkably reduced the level of IRS-1 and upregulated the level of GLUT4 with increasing intake of ALA and serum ALA content in IR rats.The results of hyperinsulinemic-euglycemic clamp test showed no significant difference between the two groups.Conclusions The results of our study suggest that consumption of n-3 PUFA at levels that can typically be found in the diet fed to IR rats in the form of ALA (0.556 g/d) may not improve insulin sensitivity, even though regulating the expression of GLUT4 and IRS-1 in the skeletal muscle.

OBJECTIVETo analyze the results of an occupational hazards survey of specially supervised enterprises (156 enterprise-times) during 2011-2012 in one district of Shenzhen, China and find out the changes in occupational hazards in these enterprises, and to put forward countermeasures for the prevention and control of occupational hazards.

METHODSOccupational hazards monitoring results for specially supervised enterprises (156 enterprise-times) during 2011-2012 were included. Comparison and analysis were performed between different years, different industries, different occupational hazards, and different sizes of enterprises.

RESULTSA total of 1274 monitoring sites from these specially supervised enterprises were included, of which qualification rate was 73.55% (937/1274), and the noise monitoring sites showed the lowest qualification rate. The overall qualification rate in 2012 (70.37%) was significantly lower than that in 2011 (80.94%) (χ(2) = 15.38, P < 0.01). In electronics industry, the qualification rate in 2012 was significantly lower than that in 2011 (χ2 = 11.27, P = 0.001). Comparison of various hazards in different industries indicated that electronic enterprises and furniture enterprises had the lowest qualification rate in noise monitoring, printing enterprises had the lowest qualification rate in organic solvent monitoring, and furniture enterprises had the lowest qualification rate in dust monitoring. Comparison between different sizes of enterprises indicated that the qualification rate of large and medium enterprises in 2012 was significantly lower than that in 2011, while the qualification rate of small enterprises in 2012 was significantly higher than that in 2011 (P < 0.01 or P < 0.05).

CONCLUSIONIn the prevention and control of occupational hazards in specially supervised enterprises, special attention should be paid to the control of organic solvents in printing enterprises and noise and dust in furniture enterprises.

Air Pollutants, Occupational ; China ; Dust ; Industry ; statistics & numerical data ; Noise, Occupational ; Occupational Exposure ; statistics & numerical data ; Occupational Health ; statistics & numerical data ; Solvents

Objective To investigate the effects of different doses Alpha-Linolenic acid ( ALA ) on the expressions of fatty acid synthesis-related genes in HepG2 cells.Methods HepG2 cells were divided into two groups, normal control group (NC) and high fat group (HF) in which cells were firstly cultured for 36h in the medium contained 0.5mmol/L stearic acid.Real-time quantitative PCR was taken to detect mRNA expression of genes SREBP1C, FAS and ACC which are related to fatty synthesis.While there are significant differences in fatty synthesis, 10%, 20%, 50%, 70% and 100%ALA took the place of stearic acid, 36h later, real-time quantitative PCR and Western blotting were taken to detect mRNA and protein expression of genes related to fatty synthesis.Results SREBP1C mRNA expression of ALA substitution groups were significantly lower than the high-fat group ( P <0.001) .The FAS of 0.5 mmol/L ALA group and 0.35 mmol/L ALA group were significantly lower than the high-fat group (P <0.001).ACC genes mRNA level was not significantly different from high-fat group.SREBP1C and FAS protein expression were significantly lower than the high-fat group, but ACC showed no significant difference.Conclusions Saturated fatty acids promote hepatocyte fatty acid synthesis, ALA abates fatty acid synthesis by inhibiting FAS and SREBP1C gene expression.

Objective To improve the clinic,CT and pathologic knowledge of pleomorphic hyanilizing angiectatic tumor of soft parts(PHAT).Methods Clinical,CT and pathologic characters of PHAT in one case at the right nuchal region were detailedly analysed with literature review.Results The clinical symptoms of PHAT were slight and unspecified.The lesion appeared as a orbicular-ovate tumour with sublobe and clear edge,the density of tumor was uneven on plain scan and uneven enhanced after injected contrast agent,and a part of the tumour was enhanced close to the CT value of blood vessel.The characters of pathology were the presence of clusters of dilated thin-walled vessels,with prominent hyalinization of vessel wall,perivascular and intercellular hyalinization,and pantomorphia neoplastic cell distributed between these dilated vessels.Conclusion PHAT is a low potential malignant soft tissue tumor,it has some specific CT and pathologic characters.

The clinical data of 67 patients underwent orthotopic liver transplantation, including 4 cases of early intra abdominal hemorrhage after orthotopic liver transplantation, were analyzed retrospectively.Anastomotic liver artery hemorrhage was found in 2 cases, hemorrhage of IVC in 1 case and hemorrhage of right adrenal gland in 1 case. All the 4 patients were correctly dignosed and successfully treated by operation in time. It suggests that the early intra abdominal hemorrhage after orthotopic liver transplantation is mostly due to surgical technique. The improvement of surgical technique,correct diagnosis and timely operation are very important for the treatment of intra abdominal hemorrhage.