Objective:To investigate the incidence and risk factors associated with poor healing in closed drainage incisions among elderly lung cancer patients(aged ≥65 years)undergoing thoracoscopic pulmonary resection.Methods:A retrospective cohort study was conducted involving 471 elderly lung cancer patients who underwent single utility port video-assisted thoracic surgery(VATS)pulmonary resection at Beijing Hospital from January 1, 2022, to December 31, 2023.Patients were categorized into'healed’and'poor healing’groups based on the development of grade B/C healing following the removal of the closed drainage tube.A comparative analysis of demographic characteristics, medical history, and perioperative parameters between the groups was performed.Multivariate logistic regression analysis was employed to identify independent risk factors for poor incision healing.Results:A total of 471 elderly lung cancer patients who underwent VATS lobectomy were enrolled, with a mean age of 71.16 ± 3.44 years. Among them, 200(42.46%)were male and 271(57.54%)were female.Among 471 patients, 101(21.44%)developed poor healing, all classified as grade B. Univariate analysis revealed statistically significant differences between the two groups regarding BMI( χ2=1.632, P=0.004), diabetes mellitus( χ2=1.558, P=0.004), prolonged drainage duration ( χ2=1.829, P=0.002), and the extent of pulmonary resection( χ2=2.571, P=0.042).Multivariate logistic regression analysis indicated that a BMI of ≥24 kg/m 2( OR=1.534, 95% CI: 1.191-3.289, P=0.033), drainage tube indwelling time exceeding 4 days postoperatively( OR=1.712, 95% CI: 1.014-3.791, P=0.036), and diabetes mellitus( OR=1.855, 95% CI: 1.418-4.015, P=0.002)were significant factors influencing poor wound healing, with statistically significant differences noted( P<0.05). Conclusions:BMI, prolonged drainage duration, diabetes mellitus, and the extent of pulmonary resection are independent risk factors for poor healing of closed drainage incisions in elderly lung cancer patients following VATS.Clinical strategies should prioritize the control of BMI, perioperative glycemic management, real-time monitoring of drainage, and timely removal of tubes to mitigate complications.

Objective:To elucidate the mechanism of acute lung injury (ALI) by investigating the relationship of sirtuin 6 (SIRT6) with lactylation of mitochondrial fission 1 protein (FIS1) and mitophagy in mice.Methods:Twenty-four SPF-grade healthy wild-type C57BL/6 mice of either sex, aged 6-10 weeks, weighing 20-25 g, were divided into 4 groups ( n=6 each) using a table of random numbers: sham operation group (group S), ALI group, ALI + agonist group (group AA), and ALI+ agonist+ lactate group (group AAL). The mouse ALI model was established by intratracheal instillation of lipopolysaccharide 5 mg/kg in anesthetized animals. Immediately after developing the model, UBCS039 30 mg/kg was injected via the tail vein in group AA, UBCS039 30 mg/kg was injected via the tail vein and L-lactic acid sodium 1 mg/g was intraperitoneally injected in group AAL, and vehicle 0.5 ml was given instead in group S. Another 6 Prkn-/- mice were selected and assigned to Prkn-/-+ ALI+ agonist group (group PAA), and UBCS039 30 mg/kg was injected via the tail vein immediately after developing the ALI model. The mice were anesthetized and sacrificed at 12 h after lipopolysaccharide instillation, and the lung tissue was obtained for determination of the FIS1 lactylation and ubiquitination levels, the binding levels of FIS1 to SIRT6 and Parkin (using co-immunoprecipitation), expression of PTEN-induced kinase 1 (PINK1), microtubule-associated protein 1 light chain 3Ⅱ (LC3Ⅱ), and mitochondrial Parkin (by Western blot) and for microscopic examination of the pathological changes (after haematoxylin and eosin staining) which were scored. The wet/dry lung weight (W/D) ratio was calculated, and the apoptosis rate of cells in lung tissues was calculated by TUNEL assay. Results:Compared with group S, the FIS1 lactylation level, W/D ratio, apoptosis rate of cells, and lung injury score were significantly increased in group ALI ( P<0.05). Compared with group ALI, the FIS1 lactylation level, W/D ratio, apoptosis rate of cells, and lung injury score were significantly decreased, the binding level of FIS1 to Parkin and FIS1 ubiquitination level were increased, and the expression of PINK1, LC3Ⅱ and mitochondrial Parkin was up-regulated in group AA ( P<0.05). Compared with group AA, the FIS1 lactylation level was significantly increased, and the binding level of FIS1 to Parkin was decreased in group AAL, and the W/D ratio, apoptosis rate of cells, and lung injury score were significantly increased, the FIS1 ubiquitination level was decreased, and the expression of PINK1, LC3Ⅱ and mitochondrial Parkin was down-regulated in group AAL and group PAA ( P<0.05). Conclusions:SIRT6 inhibits FIS1 lactylation, increases the binding of FIS1 to Parkin, and thus promotes mitophagy, which is involved in the process of ALI in mice.

Objective:To elucidate the mechanism of acute lung injury (ALI) by investigating the relationship of sirtuin 6 (SIRT6) with lactylation of mitochondrial fission 1 protein (FIS1) and mitophagy in mice.Methods:Twenty-four SPF-grade healthy wild-type C57BL/6 mice of either sex, aged 6-10 weeks, weighing 20-25 g, were divided into 4 groups ( n=6 each) using a table of random numbers: sham operation group (group S), ALI group, ALI + agonist group (group AA), and ALI+ agonist+ lactate group (group AAL). The mouse ALI model was established by intratracheal instillation of lipopolysaccharide 5 mg/kg in anesthetized animals. Immediately after developing the model, UBCS039 30 mg/kg was injected via the tail vein in group AA, UBCS039 30 mg/kg was injected via the tail vein and L-lactic acid sodium 1 mg/g was intraperitoneally injected in group AAL, and vehicle 0.5 ml was given instead in group S. Another 6 Prkn-/- mice were selected and assigned to Prkn-/-+ ALI+ agonist group (group PAA), and UBCS039 30 mg/kg was injected via the tail vein immediately after developing the ALI model. The mice were anesthetized and sacrificed at 12 h after lipopolysaccharide instillation, and the lung tissue was obtained for determination of the FIS1 lactylation and ubiquitination levels, the binding levels of FIS1 to SIRT6 and Parkin (using co-immunoprecipitation), expression of PTEN-induced kinase 1 (PINK1), microtubule-associated protein 1 light chain 3Ⅱ (LC3Ⅱ), and mitochondrial Parkin (by Western blot) and for microscopic examination of the pathological changes (after haematoxylin and eosin staining) which were scored. The wet/dry lung weight (W/D) ratio was calculated, and the apoptosis rate of cells in lung tissues was calculated by TUNEL assay. Results:Compared with group S, the FIS1 lactylation level, W/D ratio, apoptosis rate of cells, and lung injury score were significantly increased in group ALI ( P<0.05). Compared with group ALI, the FIS1 lactylation level, W/D ratio, apoptosis rate of cells, and lung injury score were significantly decreased, the binding level of FIS1 to Parkin and FIS1 ubiquitination level were increased, and the expression of PINK1, LC3Ⅱ and mitochondrial Parkin was up-regulated in group AA ( P<0.05). Compared with group AA, the FIS1 lactylation level was significantly increased, and the binding level of FIS1 to Parkin was decreased in group AAL, and the W/D ratio, apoptosis rate of cells, and lung injury score were significantly increased, the FIS1 ubiquitination level was decreased, and the expression of PINK1, LC3Ⅱ and mitochondrial Parkin was down-regulated in group AAL and group PAA ( P<0.05). Conclusions:SIRT6 inhibits FIS1 lactylation, increases the binding of FIS1 to Parkin, and thus promotes mitophagy, which is involved in the process of ALI in mice.

Objective:To investigate the incidence and risk factors associated with poor healing in closed drainage incisions among elderly lung cancer patients(aged ≥65 years)undergoing thoracoscopic pulmonary resection.Methods:A retrospective cohort study was conducted involving 471 elderly lung cancer patients who underwent single utility port video-assisted thoracic surgery(VATS)pulmonary resection at Beijing Hospital from January 1, 2022, to December 31, 2023.Patients were categorized into'healed’and'poor healing’groups based on the development of grade B/C healing following the removal of the closed drainage tube.A comparative analysis of demographic characteristics, medical history, and perioperative parameters between the groups was performed.Multivariate logistic regression analysis was employed to identify independent risk factors for poor incision healing.Results:A total of 471 elderly lung cancer patients who underwent VATS lobectomy were enrolled, with a mean age of 71.16 ± 3.44 years. Among them, 200(42.46%)were male and 271(57.54%)were female.Among 471 patients, 101(21.44%)developed poor healing, all classified as grade B. Univariate analysis revealed statistically significant differences between the two groups regarding BMI( χ2=1.632, P=0.004), diabetes mellitus( χ2=1.558, P=0.004), prolonged drainage duration ( χ2=1.829, P=0.002), and the extent of pulmonary resection( χ2=2.571, P=0.042).Multivariate logistic regression analysis indicated that a BMI of ≥24 kg/m 2( OR=1.534, 95% CI: 1.191-3.289, P=0.033), drainage tube indwelling time exceeding 4 days postoperatively( OR=1.712, 95% CI: 1.014-3.791, P=0.036), and diabetes mellitus( OR=1.855, 95% CI: 1.418-4.015, P=0.002)were significant factors influencing poor wound healing, with statistically significant differences noted( P<0.05). Conclusions:BMI, prolonged drainage duration, diabetes mellitus, and the extent of pulmonary resection are independent risk factors for poor healing of closed drainage incisions in elderly lung cancer patients following VATS.Clinical strategies should prioritize the control of BMI, perioperative glycemic management, real-time monitoring of drainage, and timely removal of tubes to mitigate complications.

Due to the virtues of no stutter peaks, low rates of mutation, and short amplicon sizes, insertion/deletion (InDel) polymorphism is an indispensable tool for analyzing degraded DNA samples from crime scenes for human identifications (Wang et al., 2021). Herein, a self-developed panel of 43 InDel loci constructed previously by our group was utilized to evaluate the genetic diversities and explore the genetic background of the Han Chinese from Beijing (HCB) including 301 random healthy individuals. The lengths of amplicons at 43 InDel loci in this panel ranged from 87 to 199 bp, which indicated that the panel could be used as an effective tool to utilize highly degraded DNA samples for human identity testing. The loci in this panel were validated and performed well for forensic degraded DNA samples (Jin et al., 2021). The combined discrimination power (PD) and combined probability of exclusion (PE) values in this panel indicated that the 43 InDel loci could be used as the candidate markers in personal identification and parentage testing of HCB. In addition, population genetic relationships between the HCB and 26 reference populations from five continents based on 19 overlapped InDel loci were displayed by constructing a phylogenetic tree, principal component analysis (PCA), and population genetic structure analysis. The results illustrated that the HCB had closer genetic relationships with the Han populations from Chinese different regions.
Beijing ; China ; Forensic Genetics/methods* ; Gene Frequency ; Genetics, Population ; Humans ; INDEL Mutation ; Phylogeny

Objective To evaluate the efficacy and toxicity of postoperative chemoradiation for D2 dissection gastric cancer,and to compare the difference of toxicity between confromal and traditional radiotherapy.Methods Sixty four patients with T3-4,N + or R1 were enrolled.Radioation was given to a total dose of 46Gy delivered in 23fractions by use of 3D-CRT or 4 fields traditional radiotherapy.Chemothrepy was administered with paclitaxel 135 mg/m2 day 1 and 29,cisplantin 20 mg/m2 day 1 ～3 and day 29 ～31 during radiotherapy.Results The median follow-up time was 40 months.The 3-year overall and relapse-free survival rates were 78.2% and 70.9%,respectively.Eighteen patients had tumor relapse.Fifty-three patients completed chemoradiotheray.Toxicities on grade 3 or above included gastrointestinal toxicity (28.1% ),eutropenia (21.8 % ) and alopecia ( 18.7% ).One patient died of hemorrhage of upper digestion tract.Conclusion Adjuvant radiotherapy with paclitaxol and cisplatin yielded satisfactory overall survival and disease-free survival in gastric cancer patients.The toxicity was manageable.Conformal radiotherapy seems to decrease the gastrointestinal toxicities compared to that occurred in the traditional radiotherapy.

Objective To study the effects of Cad-Ⅱgene on osteogenic differentiation of human mesenchymal stem cells in vitro. Methods The human marrow mesenchymal stem cells (hBMSCs) were isolated and cultured in vitro before they were divided into 2 groups. In the transfeetion group, the hBMSCs were transfeeted with Cad- Ⅱgene;in the simple osteogenic inducement group, they were cultured in the condition medium. Then the expressions of Cad- Ⅱ protein were determined and the alkaline phosphatase (ALP) activities and the expressions of ostcocalein were measured at 3, 7, 14 and 21 days for comparison between the 2 groups. Results The ALP activity and positive expression of osteoealcin were regulated significantly higher in the transfeetion group than in the simple osteogenic inducement group at different times (P <0.05). The mineralized nodes began to appear at 14 days in the 2 groups and increased with time. Conclusion Cad-Ⅱgene transfeetion can promote differentiation of hBMSCs into the osteoblasts.

[Objective]To study the expression of Cad-Ⅱ gene in bone marrow mesenchymal stem cells(MSCs) transfected with Cad-ⅡcDNA after autografted into the bone defects. [Method]The experimental model of ilium segment defect was established in 20 Japanese white rabbits.The rabbit MSCs were isolated,cultured and expanded in vitro,and then the MSCs,transfected with Cad-Ⅱ and compounded with collagen sponge were autografted into the ilium segment defect.At 4 weeks of operation,the MSCs/ collagen sponge were excised,and the expression of Cad-Ⅱ was evaluated with RT-PCR and immunohistochemical methods.[Result]All of the bone defects treated with implants exhibited new bone formation at 4 weeks postoperatively.In the transfection group,Cad-Ⅱ gene mRNA expression was higher than that in the control group(P

Objective: To better understand the effect of propofol on the spinal cord levels, and investigate whether there are different effects of propofol between nociceptive input and non-nociceptive input. Method: All Sprague-Dawley rats were spinally transected, the effect of propofol (2mg/kg, Ⅳ) on C response to the firing of electromyography, and the discharges of dorsal horn neurons were observed. Result: Propofol can produce a profound inhibition on C response,early discharges,late discharges and spontaneous discharges. Compared with early discharges, the extent of inhibition of late discharges increased but the lasting time was shorten. Conclusion: Propofol can suppress the transmission of nociceptive and non-nociceptive stimulus in spinal cord with stronger inhibition on nociceptive input,and the shorter lasting time. It is indicated that the loss of sense and pain results from the effect of propofol on the spinal cord.