Objective To investigate the relationships of expression of membrane palmitoylated protein 7(MPP7)in gastric cancer(GC)tissues with clinicopathological features and prognosis.Methods A total of 213 GC patients in the hospital from March 2018 to April 2020 were selected as research objects,and their tumor tissues and adjacent non-tumor tissues were collected.Immunohisto-chemistry(IHC)was used to detect the protein expression level of MPP7 in the tumor tissues and ad-jacent non-tumor tissues of GC patients,and the relationship between MPP7 and clinicopathological features was analyzed.The Kaplan-Meier survival curve was used to analyze the relationship between MPP7 expression and prognosis of GC patients.Univariate and multivariate Cox regression analyses were used to explore the relevant factors influencing the prognosis of GC patients.Results Compared with adjacent non-tumor tissues,MPP7 protein was significantly highly expressed in GC tissues(P＜0.05).Among GC patients,those with high MPP7 expression had significantly higher ratios of lymph node metastasis,Ⅲ to Ⅳ stages of cTNM staging,poor differentiation,and muscular layer invasion compared with those with low MPP7 expression(P＜0.001).Among the 156 patients with high MPP7 expression,the survival rate was 8.33％(13/156);among 57 patients with low MPP7 expression,the survival rate was 52.63％(30/57).The results of the Kaplan-Meier survival curve showed a significant difference in survival rates between the high MPP7 expression patients and the low MPP7 expression patients(Log-rank x2=54.333,P＜0.001).Compared with GC patients in the survival group,those in the death group had significantly higher ratios of lymph node metastasis,Ⅲ to Ⅳ stages of cTNM staging,poor differentiation,muscular layer invasion,and high MPP7 expression(P＜0.001).The results of multivariate Cox regression analysis showed that lymph node metastasis,Ⅲ to Ⅳ stages of cTNM staging,poor differentiation,muscular layer invasion,and high MPP7 expres-sion were all risk factors influencing the prognosis of GC patients(P＜0.05).Conclusion High MPP7 expression is closely related to the clinicopathological features and prognosis of GC patients,and it may serve as a potential biomarker for predicting GC progression and poor prognosis.

Liver diseases in pregnancy comprise both gestational liver disorders and acute and chronic hepatic disorders occurring coincidentally in pregnancy.Whether pregnancy-related or not,liver diseases in pregnancy are associated with a significant risk of maternal and fetal morbidity and mortality.Thus,the European Association for the Study of the Liver invited a panel of experts to develop clinical practice guidelines aimed at providing recommendations,based on the best available evidence,for the management of liver diseases in pregnancy for hepatologists,gastroenter-ologists,obstetric physicians,general physicians,training specialists and other healthcare professionals who provide care for this patient population.

OBJECTIVE: To demonstrate the mechanism of mechanical ventilation (MV) induced endoplasmic reticulum stress (ERS) promoting mechanical ventilation-induced pulmonary fibrosis (MVPF), and to clarify the role of angiotensin receptor 1 (AT1R) during the process. METHODS: The C57BL/6 mice were randomly divided into four groups: Sham group, MV group, AT1R-shRNA group and MV+AT1R-shRNA group, with 6 mice in each group. The MV group and MV+AT1R-shRNA group mechanically ventilated for 2 hours after endotracheal intubation to establish MVPF animal model (parameter settings: respiratory rate 70 times/minutes, tidal volume 20 mL/kg, inhated oxygen concentration 0.21). The Sham group and AT1R-shRNA group only underwent intubation after anesthesia and maintained spontaneous breathing. AT1R-shRNA group and MV+AT1R-shRNA group were airway injected with the adeno-associated virus one month before modeling to inhibit AT1R gene expression in lung tissue. The expressions of AT1R, ERS signature proteins [immunoglobulin heavy chain-binding protein (BIP), protein disulfide isomerase (PDI)], fibrosis signature proteins [collagen I (COL1A1), α-smooth muscle actin (α-SMA)] in lung tissues were detected by immunofluorescence and Western blotting. Hematoxylin-eosin (HE) staining was used to evaluate lung injury and Masson staining was used to evaluate pulmonary fibrosis. RESULTS: Compared with the Sham group, the degree of pulmonary fibrosis and lung injury were more significant in the MV group. In the MV group, the protein expressions of AT1R, BIP, PDI, COL1A1 and α-SMA were increased (AT1R/β-actin: 1.40±0.02 vs. 1, BIP/β-actin: 2.79±0.07 vs. 1, PDI/β-actin: 2.07±0.02 vs. 1, COL1A1/α-Tubulin: 2.60±0.15 vs. 1, α-SMA/α-Tubulin: 2.80±0.25 vs. 1, all P < 0.01). The number of E-cad⁺/AT1R⁺ and E-cad⁺/BIP⁺ cells in lung tissue increased, and the fluorescence intensity of COL1A1 and α-SMA increased. Compared with the MV group, the degree of pulmonary fibrosis and lung injury were significantly relieved in the MV+AT1R-shRNA group. In the MV+AT1R-shRNA group, the protein expressions of AT1R, BIP, PDI, COL1A1 and α-SMA were decreased (AT1R/β-actin: 0.53±0.03 vs. 1.40±0.02, BIP/β-actin: 1.73±0.15 vs. 2.79±0.07, PDI/β-actin: 1.04±0.07 vs. 2.07±0.02, COL1A1/α-Tubulin: 1.29±0.11 vs. 2.60±0.15, α-SMA/α-Tubulin: 1.27±0.10 vs. 2.80±0.25, all P < 0.01). The number of E-cad⁺/AT1R⁺ and E-cad⁺/BIP⁺ cells in lung tissue decreased, and the fluorescence intensity of COL1A1 and α-SMA decreased. There was no statistically significant difference in the indicators between AT1R-shRNA group and Sham group. CONCLUSIONS MV up-regulate the expression of AT1R in alveolar epithelial cells, activate the AT1R pathway, induce ERS and promote the progression of MVPF.
Mice ; Animals ; Pulmonary Fibrosis/chemically induced* ; Lung Injury ; Respiration, Artificial/adverse effects* ; Actins/metabolism* ; Tubulin ; Mice, Inbred C57BL ; Endoplasmic Reticulum Stress ; RNA, Small Interfering

Liver diseases in pregnancy comprise both gestational liver disorders and acute and chronic hepatic disorders occurring coincidentally in pregnancy. Whether pregnancy-related or not, liver diseases in pregnancy are associated with a significant risk of maternal and fetal morbidity and mortality. Thus, the European Association for the Study of Liver invited a panel of experts to develop clinical practice guidelines aimed at providing recommendations, based on the best available evidence, for the management of liver disease in pregnancy for hepatologists, gastroenterologists, obstetric physicians, general physicians, obstetricians, training specialists and other healthcare professionals who provide care for this patient population.

Objective:To provide more options for preoperative localization diagnosis in patients with primary hyperparathyroidism (PHPT), the diagnostic efficacy of parathyroid 4-dimensional computed tomography (4D-CT) in patients with PHPT was evaluated.Methods:This was a single-center retrospective study including 57 patients with surgical proved PHPT. All of the patients underwent 4D-CT, 99Tc m -sestamibi parathyroid imaging (MIBI), and ultrasonography (US) preoperatively. The reference standard for correct localization was based on operation reports and pathology confirmation. The patients were grouped according to the preoperative serum calcium levels, tumor diameter, or ectopic lesions (yes/no), respectively. The sensitivity, specificity, positive predictive value, negative predictive value and area under the curve (AUC) of 4D-CT, MIBI and US, alone or in combination, were analyzed in total and each subgroup patients. Results:Fifty-seven patients (39 women, 18 men; mean age of 56.5 years) were evaluated, including four cases with multi-gland disease and thirteen cases with ectopic parathyroid lesions. In all the patients, similar diagnostic efficacy was found in 4D-CT (AUC: 0.943) and MIBI (AUC: 0.927), both of which were higher than that of US (AUC: 0.847) ( P = 0.01 for 4D-CT vs. US; P = 0.04 for MIBI vs. US). In a subset analysis for ectopic quadrants, the diagnostic efficacy of 4D-CT was significantly higher than that of MIBI ( P = 0.04) or US ( P = 0.01), with the sensitivity of 100%, 69.2%, and 61.5%, and AUC of 0.989, 0.846, and 0.808 for 4D-CT, MIBI and US, respectively. Conclusions:4D-CT has similar diagnostic efficacy for preoperative localization to MIBI in patients with PHPT, and it is superior to MIBI and US in identifying the ectopic parathyroid gland. 4D-CT can be recommended as an alternative preoperative localization method, especially when parathyroid lesions could not be precisely located by US and MIBI.

OBJECTIVE:To establish a method for simultaneous determination of 5 effective components in Luohua zizhu dry extract. METHODS:UPLC-MS/MS was conducted. The separation was performed on an Zorbax Eclipse Plus C18 column with mo-bile phase of acetonitrile-water(gradient elution)at the flow rate of 0.3 mL/min. The column temperature was set at 40℃and sam-ple size was 2 μL. The analytes were detected in the multiple reaction monitoring(MRM)mode. Nitrogen was used as drying gas and atomized gas. The temperature and flow rate of drying gas were 325 ℃ and 6 L/min. The pressure of atomized gas was 45 psi. The temperature and flow rate of sheath gas were 350℃and 12 L/min. The voltage of capillary were 4000 V(+)and 3500 V(-). The voltage of nozzle was 500 V. RESULTS:The linear ranges of luteoloside,acteoside,quercetin,luteolin and rutin were 0.5048-252.4 ng/mL(r=0.9999),0.7124-356.2 ng/mL(r=0.9990),0.5094-254.7 ng/mL(r=0.9962),0.3030-151.5 ng/mL(r=0.9998) and 0.6022-301.1 ng/mL(r=0.9996),respectively. RSDs of precision,stability and reproducibility tests were all less than 3.0%. The limit of quantitation were 0.42,0.87,0.33,0.12,0.76 ng/mL. The recoveries were 97.99%-101.20%(RSD=1.3%,n=6), 96.50%-101.20%(RSD=1.7%,n=6), 94.81%-99.34%(RSD=1.7%,n=6), 97.54%-100.51%(RSD=1.2%,n=6), 93.37%-98.70%(RSD=1.9%,n=6),respectively. CONCLUSIONS:The method is simple,precise,stable and reproducible, and can be used for simultaneous determination of 5 effective components in Luohua zizhu dry extract.

Objective To evaluate the inhibitory effect of butyric acid (BA) as a histone deacetylase (HDAC) inhibitor on lipopolysaccharide (LPS)-induced pulmonary fibrosis and its mechanism. Methods Thirty C57/BL6 mice were randomly divided into three groups according to the random number method, namely control group (physiological saline was given intraperitoneally and by gavage), LPS challenge group (LPS-induced murine model of pulmonary fibrosis was reproduced with intraperitoneal injection of 10 mg/kg LPS), and BA preconditioning + LPS challenge group (10 mg/kg BA was given followed by intraperitoneal injection of 10 mg/kg LPS), with 10 mice in each group. Mice were sacrificed painlessly, and lung tissue samples were harvested at 2 weeks and 4 weeks respectively (five samples every group each time). HDAC activity was evaluated with fluorescence analysis kit. Protein expression of acetylated-histone H3 (Ace-H3), acetylated-histone H4 (Ace-H4) and thymocyte differentiation antigen 1 (Thy-1) were determined by Western Blot. The mRNA expression of Thy-1 was assessed by real-time reverse transcription- polymerase chain reaction (real-time RT-PCR). The degree of lung inflammation and fibrosis were microscopic detected after hematoxylin-eosin (HE) staining and Masson collagen staining. The deposition of lung collagen was detected by hydroxyproline content measurement kit. Results Compared to control group, the degree of lung inflammation and fibrosis was aggravated after LPS challenge, as manifested by increased hydroxyproline content (μg/mg, 2 weeks: 8.384±0.632 vs. 4.388±0.334, 4 weeks: 8.308±0.244 vs. 4.370±0.342, both P < 0.01), increased HDAC activity (μmol/L, 2 weeks: 7.243±0.384 vs. 3.628±0.641, 4 weeks: 6.479±0.202 vs. 3.238±0.524, both P < 0.01), increased deacetylation degree of histone H3 and H4 [relative expression of Ace-H3 (gray value): 0.516±0.115 vs. 1.005±0.359 at 2 weeks, 0.633±0.143 vs. 1.092±0.193 at 4 weeks, both P < 0.05; relative expression of Ace-H4 (gray value): 0.402±0.164 vs. 0.759±0.187 at 2 weeks, P > 0.05; 0.426±0.098 vs. 0.858±0.177 at 4 weeks, P < 0.01], and lowered Thy-1 mRNA and protein expression [Thy-1 mRNA (2-ΔΔCt): 0.606±0.066 vs. 1.005±0.109 at 2 weeks, P < 0.01; 0.824±0.101 vs. 1.210±0.400 at 4 weeks, P > 0.05; relative expression of Thy-1 protein (gray value): 0.725±0.284 vs. 1.249±0.297 at 2 weeks, 0.589±0.139 vs. 1.372±0.343 at 4 weeks, both P < 0.05]. Compared with LPS group, BA precondition could inhibit above processes, as manifested by decreased hydroxyproline content (μg/mg: 5.943±0.726 vs. 8.384±0.632 at 2 weeks, 4.938±0.209 vs. 8.308±0.244 at 4 weeks, both P < 0.01), decreased HDAC activity (μmol/L: 4.386±0.117 vs. 7.243±0.384 at 2 weeks, 4.863±0.096 vs. 6.479±0.202 at 4 weeks, both P < 0.01), increased Thy-1 mRNA expression at 2 weeks (2-ΔΔCt: 0.884±0.216 vs. 0.606±0.066, P < 0.05), increased acetylation degree of histone H4 and Thy-1 protein expression at 4 weeks [relative expression of Ace-H4 (gray value): 0.715±0.145 vs. 0.426±0.098, P < 0.05; relative protein expression of Thy-1 (gray value): 0.939±0.098 vs. 0.589±0.139, P < 0.01]. Conclusions LPS-induced pulmonary fibrosis was related with activation of HDAC, deacetylation of histone H3 and H4 and Thy-1 gene silencing. HDAC inhibitor BA could inhibit LPS-induced pulmonary fibrosis and Thy-1 gene silencing through inhibiting activation of HDAC and deacetylation of histone H4.