BACKGROUND: Neoadjuvant therapy enhances the possibility of achieving radical resection and improves the prognosis for locally advanced gastric cancer (GC). However, there is a lack of evidence regarding the optimal extent of resection for locally advanced proximal GC after neoadjuvant therapy. METHODS: In this study, 330 patients underwent resection in Peking University Cancer Hospital, with curative intent after neoadjuvant therapy for histologically confirmed proximal GC from January 2009 to December 2022. RESULTS: In this study, 45 patients underwent proximal gastrectomy (PG), while 285 underwent total gastrectomy (TG). After propensity-score matching, 110 patients (71 TG and 39 PG) were included in the analysis. No significant differences between PG and TG regarding short-term outcomes and long-term prognosis were found. Specifically, PG demonstrated comparable overall survival to TG ( P = 0.47). Subgroup analysis revealed that although not statistically significant, PG showed a potential advantage over TG in overall survival for patients with tumor-long diameters less than 4 cm ( P  = 0.31). However, for those with a long diameter larger than 4 cm, TG had a better survival probability ( P  = 0.81). No substantial differences were observed in baseline characteristics, surgical safety, postoperative recovery, and postoperative complications. CONCLUSION For locally advanced proximal GC with objective response to neoadjuvant therapy (long diameter <4 cm), PG is an alternative surgical procedure.
Humans ; Stomach Neoplasms/drug therapy* ; Gastrectomy/methods* ; Neoadjuvant Therapy/methods* ; Male ; Female ; Middle Aged ; Propensity Score ; Aged ; Adult ; Retrospective Studies

In recent years,various methods for detecting exogenous and endogenous hypochlorite have been studied,considering its essential role as a biomolecule.However,the existing technologies still pose obstacles such as their invasiveness,high costs,and complicated operation.In the current study,we developed a glow-type chemiluminescent probe,hypochlorite chemiluminescence probe(HCCL)-1,based on the scaffold of Schaap's 1,2-dioxetane luminophores.To better explore the physiological and pathological functions of hypochlorite,we modified the luminophore scaffold of HCCL-1 to develop several probes,including HCCL-2,HCCL-3,and HCCL-4,which amplify the response signal of hypo-chlorite.By comparing the luminescent intensities of the four probes using the IVIS? system,we determined that HCCL-2 with a limit of detection of 0.166 μM has enhanced sensitivity and selectivity for tracking hypochlorite both in vitro and in vivo.

Objective To explore the pathogenic mechanism by detecting the expression of membrane glycoprotein in the platelets of nonmuscle myosin heavy chain 9 related disease (MYH9-RD)patients.Methods Periperal bloods were obtained from 11 MYH9-RD patients and 7 normal family members.Flow cytometry was used for detecting the expression of the platelet membrane glycoprotein including GP Ⅱ b/Ⅲa(CD41/61),GP Ⅰ a(CD49b),GP Ⅰ b/Ⅸ/Ⅴ (CD42a) GP Ⅰ b(CD42b) and GPⅣCD36).Results The expression fluorescence intensity of platelet membrane glycoprotein GP Ⅱ b/Ⅲ a CD41/61),GPⅠa(CD49b),GP Ⅰ b/Ⅸ/Ⅴ (CD42a) GP Ⅰ b(CD42b) and GPⅣ (CD36) are 653.7 ±192.7,420.0 ± 151.3,667.7 ± 371.3 and 236.4 ± 64.2 respectively,which are significantly higher than those in normal controls (406.7 ± 126.1,181.2 ± 29.3,271.4 ± 91.6 and 136.1 ± 23.5 ; P ＜ 0.01) ; The expression of GP Ⅰ a(CD49b) was lower in patients with MYH9-RD (139.1 ± 54.9) than that in normal controls (192.2 ± 143.4),but there was no significant difference (P ＞ 0.05).Conclusion In our study,the diverse clinical manifestations in patients with MYH9-RD is probably associated with the expression level of platelet membrane glycoprotein

Objective To study the combined effect of interleukin-21 gene transfer and ionizing radiation on the growth of cervical carcinoma HeLa cells.Methods Previously constructed Ad-IL-21 gene was amplified by infecting 293A cells and the titer was measured by TCID50 method. HeLa cells were transfected with Ad-1L-21 and then irradiated with 6 Gy 137Cs γ-rays.The cells were divided into 5 groups,including blank control,Ad-LaeZ group,Ad-IL-21 group,radiation group and Ad-IL-21 combined with radiation group (combination group).The cell growth,cell cycle,apoptosis,and the expressions of IL-21 gene and protein in HeLa cells were detected.Results Ad-IL-21 was successfully amplified and the titer of Ad-11.-21 was 9 × 1010 pfu/ml.Compared with Ad-IL-21 group and radiation group,the cell growth of combination group was significantly inhibited at 96 h after transfection ( F =85.26,72.98,P ＜ 0.05 ).The cells in combination group were arrested in G1 phase and decreased at S phase( F =36.69,34.83,P ＜ 0.05),while the cellular apoptosis increased markedly ( F =28.23,25.57,P ＜ O.05 ). The gene expression of 1L-21 in the combination group was 1.54- and 2.43-fold of Ad-IL-21 group and blank control group,respectively (F=22.31,36.65, P ＜ 0.05 ), while the protein expression of IL-21 in the combination group was 1.62-fold and 2.31-fold of Ad-IL-21 group and blank control group,respectively ( F =27.36,35.86,P ＜ 0.05 ).Conclusions Ad-IL-21 gene transfection combined with radiation has synergic effect on the inhibition of cervical carcinoma cell growth.

Objective:To investigate the effect of interleukin-1β (IL-1β) on epithelial-mesenchymal transition (EMT) and cytoskeleton rearrangement of renal tubular epithelial cells.Methods:Immortalized renal tubular epithelial cell line NRK52E was cultured in vitro with IL-1β (30 μg/L) for 3 days and 6 days,then the cell morphology was observed;The mRNA expressions of α-smooth muscle actin (α-SMA),cytoskeleton components β-actin and α-tubulin were semi-quantitative examined by RT-PCR.The protein expression of α-SMA and arrangements of β-actin and α-tubulin were assessed by immunofluorescent staining.Results:After induced by IL-1β for 3 days and 6 days in vitro,the mRNA and protein expression of α-SMA increased significantly compared with corresponding control cells (P<0.001),it prompted that NRK52E cells underwent EMT;At the same time,the cell morphology also changed,from a typical multilateral paving stone to fibroblast-like appearance,with multiple processes; Cytoskeletal protein β-actin mRNA expression was also slightly increased (P<0.05).The distributions and arrangements of β-actin protein were also changed,from cell membrane transferred to peri-nucleus and cytoplasm,moreover it formed fiber bundle-like structures.However,another cytoskeleton protein α-tubulin in IL-1β induced cells,neither it's mRNA expression nor it's distribution had significant differences compared with the control group.Conclusion:IL-1β can induce NRK52E cells undergoing EMT in vitro,cell morphology changes into fibroblast-like appearance with multiple processes,and also the cytoskeleton protein β-actin expression increases and rearrangement occurrs.However,there was no changes onα-tubulin.

Objective To develop a sensitive HPLC method for the determination of malachite green in fresh water. Methods The HPLC column of ZORBAX SB-C18 (250 mm?4.6 mm, 5 ?m) was employed and acetonitrile and acetate buffer (0.1 mol/L, pH=4.5, V∶V=80∶20) were taken as the mobile phase. The samples were tested at wave length of 588 nm after post-column oxidation with PbO2 flowed at 1.5 ml/min. Results The average recovery rate were 98.5% and 97.8% respectively at the water concentration of 2.0 ?g/L and 10.0 ?g/L,the relative standard deviations (RSD) were 11.2% and 8.0%,the least detection limit was 0.02 ?g/L. Conclusion The method is stable,sensitive and suitable for the detection of malachite green in water.

OBJECTIVE： To develop a method of thin－ layer chromatographic scanning to determine the content of puerarin in Jiangtang pill METHODS： Silica GF254 thin－ layer was used， and the mobile phase consisted of chloroform－ methanol－ water(7∶ 2 5∶ 0 25) with the detection wave－ length of 254nm and the control wave－ length of 370nm RESULTS： The linear range of puerarin was 0 4～ 2 0μ g The mean recovery was 99 40％ (n=5) with RSD of 1 37％  CONCLUSION： This method is accurate， reliable and can be used for the determination of puerarin in Jiangtang pill

Objective: To study the feasibility of percutaneous absorption of Compound Patch of Hyperosteogeny(CPH). Methods: The content of ferulic acid,an index composition in percutaneous receptor fluid and release receptor fluid were determined by HPLC.Results: The results of in vitro transdermal delivery experiment and in vitro release experiment showed that ferulic acid permeated at the constant speed of 0.2142?g?cm -2 ?h -1 in 24 hours and its release coincided with Higuchi Equation.Futhermore,the release rate was 14.53?g?cm -2 ?h -1/2 . Conclusion: CPH is a skeleton controlledtransdermal delivery system whose permeation speed is limited by skin.