Objective To evaluate the efficacy and safety of intraoperative pleural irrigation with Nocardia rubra cell-wall skeleton (N-CWS) for reducing pleural effusion drainage after radical surgery for lung cancer. Methods A retrospective analysis was conducted on the clinical data of lung cancer patients who underwent lobectomy and mediastinal lymph node dissection at the First Affiliated Hospital of Xiamen University between December 2024 and May 2025. Patients were divided into a control group and an irrigation group based on the intraoperative use of N-CWS. Patients in the irrigation group received pleural irrigation with 800 μg of N-CWS diluted in 10 mL of normal saline. The following outcomes were compared between the two groups: pleural effusion drainage volume at 0-24 h, 24-48 h, and 48-72 h postoperatively, degree of air leak, chest tube duration, postoperative length of stay, and the incidence of adverse events (fever, chest pain, and nausea and vomiting). Results A total of 245 patients were included (97 males, 148 females) with a mean age of (61.28±6.26) years, with 205 in the control group and 40 in the irrigation group. Compared to the control group, the irrigation group showed significantly lower pleural effusion drainage volumes at 0-24 h, 24-48 h, and 48-72 h, as well as shorter chest tube duration and postoperative length of stay (all P<0.05). There was no statistical difference in the degree of postoperative air leak (P=0.661). No significant differences were observed between the two groups regarding the highest body temperature within 72 h post-surgery (P=0.130), fever grade (P=0.196), severity of chest pain (P=0.105), or the incidence of nausea and vomiting (P=0.376). Conclusion Intraoperative pleural irrigation with N-CWS in patients undergoing lobectomy and mediastinal lymph node dissection for lung cancer can significantly reduce postoperative pleural effusion drainage volume, shorten chest tube duration and length of hospital stay. The procedure is safe and feasible.

Objective To understand the current status of blood pressure variability and dyslipidemia in young and middle-aged patients with ischemic stroke, and to explore their relationship with prognosis. Methods A total of 312 young and middle-aged patients with ischemic stroke who met the inclusion criteria in Beijing Pinggu District Hospital from January 2022 to January 2025 were selected. The prognosis status [modified Rankin scale (mRS)], blood pressure variability, and blood lipids [total cholesterol (TC), triacylglycerol (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C)] were analyzed. The correlation of blood pressure variability and blood lipids levels with prognosis was explored by logistic regression analysis. Results There were 206 patients with good prognosis and 106 patients with poor prognosis. The number of patients who received diversified health education in the good prognosis group was more than that in the poor prognosis group (P<0.05). The systolic blood pressure successive variation (SV) and average real variability (ARV), and diastolic blood pressure SV and ARV were lower in the good prognosis group than those in the poor prognosis group (P<0.05). Furthermore, compared with the poor prognosis group, the good prognosis group had lower levels of TC, TG and LDL-C, while the number of patients receiving diversified health education and the level of HDL-C were higher (P<0.05). After logistic regression analysis, it was found that the levels of TC, TG, LDL-C, systolic blood pressure SV and ARV, and diastolic blood pressure SV and ARV were risk factors for poor prognosis. Conversely, receiving diversified health education and HDL-C level were protective factors for poor prognosis (P<0.05). Conclusion High blood pressure fluctuation, dyslipidemia, and lack of health education will increase the risk of poor prognosis in young and middle-aged stroke patients.

OBJECTIVE To investigate the effects and mechanisms of oliceridine fumarate （TRV130） in improving postoperative cognitive dysfunction （POCD） in elderly rats based on the Toll-like receptor 4 （TLR4）/nuclear factor-κB （NF-κB） pathway. METHODS Rats were randomly divided into the control group （normal saline）， the model group （normal saline）， the TRV130 group （2.8 mg/kg）， the TLR4/NF-κB pathway inhibitor （TAK-242） group （3 mg/kg）， the β -arrestin inhibitor （Barbadin） group （3 mg/kg）， and the traditional opioid drug （morphine） group （2.8 mg/kg）， with 15 rats in each group. Except for the control group， POCD models were established in all other groups. From the first day after surgery， drugs/normal saline were administered via caudal vein injection once daily for 3 consecutive days. After the last administration， the pathological damage of hippocampal tissue was observed； the cognitive function， serum inflammatory factor levels， hippocampal neurons apoptosis rate， and the expression of ionized calcium-binding adapter molecule 1 （Iba-1）， glial fibrillary acidic protein （GFAP）， and TLR4/NF-κB pathway-related mRNA and protein in hippocampal tissue were detected. RESULTS In the model group， the neurons in the CA1 region of the hippocampus were disordered and sparse， with decreased number， pyknotic and fragmented nuclei accompanied by inflammatory cell infiltration. Compared with the control group， the escape latency， serum levels of tumor necrosis factor α （TNF-α）， interleukin-6 （IL-6）， and IL-1β， hippocampal neurons apoptosis rate， average fluorescence intensities of Iba-1 and GFAP， mRNA expression levels of TLR4 and NF-κB p65， and their protein expression/phosphorylation levels in hippocampal tissue were significantly increased/elevated in the model group （ P ＜0.05）； the time spent in the target quadrant and the number of platform crossings were significantly shortened/decreased （ P ＜0.05）. Compared with the model group， the cognitive function， pathological， inflammatory， and apoptosis-related indicators were significantly improved in the TRV130 group， TAK-242 group， and Barbadin group （ P ＜0.05）； the mRNA expression levels of TLR4 and NF-κB p65 and their protein expression/phosphorylation levels were significantly decreased in the TRV130 group and TAK-242 group （ P ＜0.05）. CONCLUSIONS TRV130 may improve POCD in elderly rats by inhibiting the TLR4/NF-κB pathway and alleviating postoperative central nervous system inflammatory responses.

Objective To establish a high-performance liquid chromatography method to detect empagliflozin and related substances in empagliflozin bulk drug and tablets,and to provide technical support for quality control and unified monitoring of empagliflozin bulk drug and its tablets.Methods A liquid chromatography development system with the full factorial design of experiments and the Box-Behnken model was used to screen and optimize the chromatographic parameters.Related substances were detected in empagliflozin API and empagliflozin tablets from different companies with the optimized chromatographic parameters.Results The optimized chromatographic parameters were obtained:Shim-pack GIST C18-AQ column(250 mm×4.6 mm,5 μm)was used,column temperature was 15 ℃,gradient elution with water-acetonitrile as mobile phase was as below,flow rate was 1.2 mL·min-1,detection wavelength was set at 224 nm.The specificity of the method is good,with recoveries ranging from 94.8％to 101.7％,and RSD ranging from 0.5％to 3.1％.The known single impurity in APIs and tablets is less than 0.05％,any other unknown single impurity is less than 0.06％,and the total amount of impurities are less than 0.3％.The related substances of supervised sampling are under good control.Conclusion The method is reliable and robust for determining related substances of empagliflozin and its tablets.

Objective:To investigate the therapeutic effect of combined extracranial-intracranial revascularization on elderly patients with symptomatic chronic internal carotid artery occlusion, and to evaluate its safety and efficacy in the elderly population.Methods:A retrospective analysis was conducted on 35 elderly patients(aged ≥60 years)who underwent combined extracranial-intracranial revascularization for symptomatic chronic internal carotid artery occlusion in the Department of Neurosurgery, Renmin Hospital of Wuhan University from January 2017 to June 2022.The clinical data during hospitalization, as well as the follow-up data within 2 years after operation, were collected and analyzed.Results:A total of 35 cases of combined extracranial-intracranial revascularization were performed on 35 patients.The age at surgery ranged from 60 to 74 years(mean age 65.5 ± 4.2 years). The incidence of reversible neurological deficits within 2 weeks postoperation was 34.3%, and the incidence of focal cerebral infarction within 30 days postoperation was 5.7%.The patency rate of the bridging vessel was 97.1% at 3 months postoperation., and the incidence of focal cerebral infarction during the follow-up period of 30 days to 2 years postoperation was 2.9%.At 3 months after surgery, computed tomography perfusion imaging showed that regional cerebral blood flow(rCBF), regional cerebral blood volume(rCBV), regional mean transit time(rMTT), and regional time to peak(rTTP)were improved compared with those before surgery.The modified Rankin scale score decreased compared to preoperative values, while the Montreal Cognitive Assessment showed improvement in cognitive function compared to preoperative levels(all P<0.05). From 6 months to 1-year postoperation, cerebral angiography showed that 38.7% of the patients had neovascularization of Matsushima grade A or grade B. No cases of cerebral hemorrhage or death was observed during the treatment and follow-up. Conclusions:Combined extracranial-intracranial revascularization is safe and effective for elderly patients with symptomatic chronic internal carotid artery occlusion, which can improve the patient′s hemodynamic disorders, prevent infarction events, and improve the patients′ neurological function and cognitive ability.

Objective To establish a high-performance liquid chromatography method to detect empagliflozin and related substances in empagliflozin bulk drug and tablets,and to provide technical support for quality control and unified monitoring of empagliflozin bulk drug and its tablets.Methods A liquid chromatography development system with the full factorial design of experiments and the Box-Behnken model was used to screen and optimize the chromatographic parameters.Related substances were detected in empagliflozin API and empagliflozin tablets from different companies with the optimized chromatographic parameters.Results The optimized chromatographic parameters were obtained:Shim-pack GIST C18-AQ column(250 mm×4.6 mm,5 μm)was used,column temperature was 15 ℃,gradient elution with water-acetonitrile as mobile phase was as below,flow rate was 1.2 mL·min-1,detection wavelength was set at 224 nm.The specificity of the method is good,with recoveries ranging from 94.8％to 101.7％,and RSD ranging from 0.5％to 3.1％.The known single impurity in APIs and tablets is less than 0.05％,any other unknown single impurity is less than 0.06％,and the total amount of impurities are less than 0.3％.The related substances of supervised sampling are under good control.Conclusion The method is reliable and robust for determining related substances of empagliflozin and its tablets.

In 1952,China carried out departmental adjustments among universities to strengthen its higher education.In 1953,a specialized program on Biochemistry was established within the Specialty of Human and Animal Physiology at Peking University,and a Biochemistry Teaching and Research Division was then set up.In 1956,the first biochemistry major was established in Peking University among all the comprehensive universities in China.The biochemistry teaching emphasized its foundation in both biology and chemistry,and tried to educate students with sound foundations,sufficient practices,and great inspi-ration.The research work focused on three key areas:protein structures and functions,neurobiology,and nucleic acid functions.Dr.Zhang Longxiang's protein research group was the first to chemically synthesize an octapeptide in China and to determine the changes in chemical structure and properties of trypsin after its autocleavage.They also determined the amino acid sequence of the lactate dehydrogenase M-chain of giant panda for the purpose of proposing a new classification system on these animals.Later,research on protein molecular design was conducted,on the basis of which the State Key Laboratory of Protein Engineering was established at Peking University.Xu Changfa and Ru Binggen constructed a new type of guided thrombolytic agent through protein engineering.Shen Tong and Wang Jingyan studied the metabolism of animal brains under low temperature and hypoxia conditions,and Dr.Wang Jingyan also studied neuropeptides.Drs.Shen Tong and Zhu Shenggeng developed various methods for isolating and purifying nucleic acids.Via the integration of genetic information through retrotransposons,Zhu Shenggeng isolated multiple specific antigens and antibodies by utilizing the phage display technique.Dr.Chen Tongdu investigated the changes in chemical structure and properties during protein denaturation,nutriology as well as the redox reactions in biology.Dr.Wang Zhimei assisted Dr.Chen Tongdu in con-tinuing Dr.Hsien Wu's research on protein denaturation.The Biochemistry Teaching and Research Di-vision also attached great importance in serving the society,including its great efforts in training teachers for other universities and organizing the China-United States Biochemistry Examination and application(CUSBEA)program,as well as publishing a biochemistry textbook widely used in China since 1980.During the reform and opening up period of China,a large number of young faculty members joined the biochemistry department of Peking University,and the role of research groups has been fully appreciated,resulting in a series of new achievements in biochemistry teaching and research.However,biochemistry is facing significant conceptual changes and needs new ideas and methodologies.Therefore,it remains important to organize the faculty members into teaching and research unit for more effective teaching and research.

Objective To explore the effect of transcutaneous auricular vagus nerve stimulation(taVNS)on postoperative recovery of gastrointestinal function in gynecological laparoscopic surgery patients.Methods Ninety-six patients who underwent elective laparoscopic total hysterectomy were selected.According to the random number table method,patients were divided into the taVNS group(group T)and the sham stimulation group(group F)with 48 patients in each group.The conventional general anesthesia method was used in both groups.The group T received taVNS once before surgery and once in the anaesthesia recovery room with 30 min per stimulation,while the group F was given sham stimulation for 30 min each.Postoperative recovery time of anal gas and defecation,the I-FEED scores on the 1st,2nd and 3rd postoperative days,the GSRS score on the 3rd postoperative day were recorded.The NRS scores on the 1st and 2nd postoperative days,postoperative remedial analgesia,occurrence of postoperative adverse effects and duration of postoperative hospitalization were recorded.Results Compared with the group F,the time to first postoperative anal exhaust and defecation was significantly shorter in the group T.The I-FEED scores on the 1st,2nd and 3rd postoperative days,and the GSRS score on 3rd postoperative day were significantly decreased in the group T.The proportion of patients with postoperative gastrointestinal intolerance and postoperative gastrointestinal dysfunction were reduced in the group T(P＜0.05).NRS scores at postoperative days 1,and 2 were decreased and the incidence of postoperative nausea was lower(P＜0.05).There were no significant differences in postoperative remedial analgesia,the occurrence of postoperative vomiting,dizziness,bradycardia and hypotension,and duration of postoperative hospitalization in the two groups of patients(P＞0.05).Conclusion taVNS can improve the recovery of postoperative gastrointestinal function,reduce postoperative nausea and alleviate postoperative pain in laparoscopic total hysterectomy patients.

Lens injury is an important etiological factor in the reduction of visual function following ocular trauma.Currently, there are no clear standards for the classification of lens injury, and comprehensive diagnostic tools are lacking.This deficiency leads to numerous controversies and challenges in critical areas, such as diagnosis and preoperative evalution, timing of surgery, surgical strategy, and assessment of postoperative prognosis.Tomographic imaging technology, such as computed tomography, magnetic resonance imaging, optical coherence tomography, has introduced a new dimension to the evaluation of lens injury, which is crucial for assessing the transparency, texture, location, morphology, and integrity of the lens, as well as the zonules and nearby intraocular structures.However, the use of tomographic imaging technology is somewhat limited due to the limitations of relying on a single method.With the ongoing advancement of imaging technologies and the rapid development of big data and artificial intelligence, tomographic imaging will become an increasingly essential tool in the future management of lens injury.Our expert group reviewed the epidemiological characteristics and classification of lens injury and the major challenges currently faced in the diagnosis and treatment of lens injury, and provided expert recommendations mainly focusing on the application, shortcomings and limitations of current tomographic imaging technology in the diagnosis and treatment of lens injury, and future development directions.

Objective To determine the related substances in ornidazole active pharmaceutical ingredient(API)and injections using high performance liquid chromatography(HPLC)and to study the impurity profile of ornidazole using liquid chromatography-tandem mass spectrometry(LC-MS/MS)combined with forced degradation tests,aiming to clarify the sources of impurities and their correlation with the prescription and production process and providing technical support for the unified evaluation and quality control of this product.Methods A Phenomenex Luna C18column(4.6 mm×250 mm,5 μm)was used for the separation of ornidazole and its impurities,with 0.000 5%formic acid as mobile phase A and methanol as mobile phase B under gradient elution.The impurity content of 4 batches of APIs,3 batches of reference preparations,and 11 batches of domestic generic preparations were determined.The structure of unknown impurities was predicted using Jet Stream Ion Focusing Electrospray Ionization-Time of Flight Mass Spectrometry(AJS-TOF-MS/MS),and the sources of impurities were identified combined with forced degradation experiments,the prescription and the production process of various manufacturers.Results Ornidazole and its known impurities were well separated under the chromatographic conditions.The structures of five unknown impurities were inferred,and the sources of the impurities were identified.Conclusion This study provides a reference for impurity analysis,quality control,and overall evaluation of ornidazole API and injection.