Lung cancer is the most common malignant tumor worldwide, ranking first in both incidence and mortality rates. According to the latest statistics from the International Agency for Research on Cancer (IARC), approximately 2.5 million new cases and around 1.8 million deaths from lung cancer occurred in 2022, placing a tremendous burden on global healthcare systems. The high mortality rate of lung cancer is closely linked to its subtle early symptoms, which often lead to diagnosis at advanced stages. This not only complicates treatment but also results in substantial economic losses. Current treatment options for lung cancer include surgery, radiotherapy, chemotherapy, targeted drug therapy, and immunotherapy. Among these, immunotherapy has emerged as the most groundbreaking advancement in recent years, owing to its unique antitumor mechanisms and impressive clinical benefits. Unlike traditional therapies such as radiotherapy and chemotherapy, immunotherapy activates or enhances the patient’s immune system to recognize and eliminate tumor cells. It offers advantages such as more durable therapeutic effects and relatively fewer toxic side effects. The main approaches to lung cancer immunotherapy include immune checkpoint inhibitors, tumor-specific antigen-targeted therapies, adoptive cell therapies, cancer vaccines, and oncolytic virus therapies. Among these, immune checkpoint inhibitors and tumor-specific antigen-targeted therapies have received approval from the U.S. Food and Drug Administration (FDA) for clinical use in lung cancer, significantly improving outcomes for patients with advanced non-small cell lung cancer. Although other immunotherapy strategies are still in clinical trials, they show great potential in improving treatment precision and efficacy. This article systematically reviews the latest research progress in lung cancer immunotherapy, including the development of novel immune checkpoint molecules, optimization of treatment strategies, identification of predictive biomarkers, and findings from recent clinical trials. It also discusses the current challenges in the field and outlines future directions, such as the development of next-generation immunotherapeutic agents, exploration of more effective combination regimens, and the establishment of precise efficacy prediction systems. The aim is to provide a valuable reference for the continued advancement of lung cancer immunotherapy.

OBJECTIVE: To compare the effectiveness of dynamic fixation and plate augmentation combined with bone grafting for femoral nonunion after interlocking intramedullary nails. METHODS: Between January 2008 and December 2022, a total of 128 patients who developed femoral nonunion following static fixation with interlocking intramedullary nailing were retrospectively analyzed. All patients underwent either dynamic intramedullary nail fixation or plate fixation with bone grafting while retaining the original intramedullary nail. There were 104 males and 24 females;the age ranged from 19 to 59 years old with an average of(32.70±9.21) years old. Patients were categorized into dynamization group and plate group based on the distinct treatment modalities. There were 67 patients in the dynamization group, comprising 54 males and 13 females. The age range was from 19 to 58 years old, with a mean age of (32.68±9.33) years old. All patients underwent open reduction and anterograde interlocking intramedullary nail fixation. Dynamic fixation was implemented between 10 and 28 months postoperatively.The plate group comprised 61 patients, of whom 50 were male and 11 were female. The age distribution ranged from 20 to 59 years old, with a mean age of (32.84±9.07) years old. All patients underwent open reduction and anterograde interlocking intramedullary nailing. Plate reinforcement fixation was performed between 10 and 30 months postoperatively. The incision length, duration of surgery, intraoperative blood loss, hospitalization period, fracture healing status, and incidence of complications were compared between the two groups of patients. RESULTS: All patients were followed up for a minimum duration of 1 year. The mean follow-up period for the dynamization group was(26.12±11.82) months, compared to (26.57±12.48) months for the plate group. No statistically significant difference was observed between the two groups (P>0.05). The incision size (2.73±1.21) cm, operation time (22.73±3.20) min and blood loss (19.06±6.22) ml in the dynamization group were significantly less than those in the plate group(22.53±2.24) cm, (126.40±13.91) min and(237.36±81.56) ml, respectively(P<0.05). All nonunion in the plate group were successfully healed, and the healing time duration ranged from 4 to 7 months with an average of(6.16±0.99) months. In the dynamization group, a total of 42 patients achieved fracture healing, with a healing duration ranging from 4 to 8 months with an average of (6.26±1.23) months. There was significant difference in healing rate between 2 groups (P<0.05), but there was no significant difference in healing time between 2 groups (P>0.05). The average treatment cost was(17 700.18±4 846.27) yuan in the plate group and (334.24±18.16) yuan in the dynamization group, and there was significant difference in costs between 2 groups (P<0.05). CONCLUSION Either dynamic fixation or plate augmentation combined with bone grafting is an effective method, but dynamic fixation is superior to plate augmentation combined with bone grafting for the treatment of femoral hyperplastic nonunion after interlocking intramedullary nails. Dynamic fixation offers several advantages, including simplified procedures, reduced trauma, and cost-effectiveness in medical expenses, making it superior to additional plate fixation combined with bone grafting. However, dynamic fixation is not suitable for the treatment of femoral atrophic nonunion.
Humans ; Male ; Female ; Adult ; Middle Aged ; Fracture Fixation, Intramedullary/adverse effects* ; Femoral Fractures/surgery* ; Fractures, Ununited/surgery* ; Bone Nails ; Retrospective Studies ; Bone Plates ; Young Adult

PURPOSE: We carried out the study aiming to explore and analyze the risk factors, the distribution of pathogenic bacteria, and their antibiotic-resistance characteristics influencing the occurrence of surgical site infection (SSI), to provide valuable assistance for reducing the incidence of SSI after traumatic fracture surgery. METHODS: A retrospective case-control study enrolling 3978 participants from January 2015 to December 2019 receiving surgical treatment for traumatic fractures was conducted at Tangdu Hospital of Air Force Medical University. Baseline data, demographic characteristics, lifestyles, variables related to surgical treatment, and pathogen culture were harvested and analyzed. Univariate analyses and multivariate logistic regression analyses were used to reveal the independent risk factors of SSI. A bacterial distribution histogram and drug-sensitive heat map were drawn to describe the pathogenic characteristics. RESULTS: Included 3978 patients 138 of them developed SSI with an incidence rate of 3.47% postoperatively. By logistic regression analysis, we found that variables such as gender (males) (odds ratio (OR) = 2.012, 95% confidence interval (CI): 1.235 - 3.278, p = 0.005), diabetes mellitus (OR = 5.848, 95% CI: 3.513 - 9.736, p < 0.001), hypoproteinemia (OR = 3.400, 95% CI: 1.280 - 9.031, p = 0.014), underlying disease (OR = 5.398, 95% CI: 2.343 - 12.438, p < 0.001), hormonotherapy (OR = 11.718, 95% CI: 6.269 - 21.903, p < 0.001), open fracture (OR = 29.377, 95% CI: 9.944 - 86.784, p < 0.001), and intraoperative transfusion (OR = 2.664, 95% CI: 1.572 - 4.515, p < 0.001) were independent risk factors for SSI, while, aged over 59 years (OR = 0.132, 95% CI: 0.059 - 0.296, p < 0.001), prophylactic antibiotics use (OR = 0.082, 95% CI: 0.042 - 0.164, p < 0.001) and vacuum sealing drainage use (OR = 0.036, 95% CI: 0.010 - 0.129, p < 0.001) were protective factors. Pathogens results showed that 301 strains of 38 species of bacteria were harvested, among which 178 (59.1%) strains were Gram-positive bacteria, and 123 (40.9%) strains were Gram-negative bacteria. Staphylococcus aureus (108, 60.7%) and Enterobacter cloacae (38, 30.9%) accounted for the largest proportion. The susceptibility of Gram-positive bacteria to Vancomycin and Linezolid was almost 100%. The susceptibility of Gram-negative bacteria to Imipenem, Amikacin, and Meropenem exceeded 73%. CONCLUSION Orthopedic surgeons need to develop appropriate surgical plans based on the risk factors and protective factors associated with postoperative SSI to reduce its occurrence. Meanwhile, it is recommended to strengthen blood glucose control in the early stage of admission and for surgeons to be cautious and scientific when choosing antibiotic therapy in clinical practice.
Humans ; Surgical Wound Infection/epidemiology* ; Male ; Female ; Risk Factors ; Retrospective Studies ; Middle Aged ; Adult ; Case-Control Studies ; Fractures, Bone/surgery* ; Aged ; Drug Resistance, Bacterial ; Logistic Models ; Anti-Bacterial Agents/therapeutic use* ; Incidence ; Bacteria/drug effects*

OBJECTIVE: To standardize the operative procedure for tissue-engineered cartilage repair, by demonstrating surgical technique of arthroscopic implantation of decalcified cortex-cancellous bone scaffolds, and summarizing the surgical experience of the sports medicine department team at Peking University Third Hospital. METHODS: This article elaborates on surgical techniques and skills, focusing on the unabridged implantation technology and surgical procedure of decalcified cortex-cancellous bone scaffolds under arthroscopy: First, the patient was placed in the supine position. After anesthesia had been established, the surgeon established an arthroscope and explored the damaged area under the scope. After confirming the size and location of the injury site, the surgeon cleaned the damaged cartilage, and also trimmed the edges of the cartilage to ensure that the cut surface was smooth and stable. the surgeon performed the micro-fracture surgery in the area of cartilage injury, and then measured the size of the injured area under the scope. Next, the surgeon manually trimmed the tissue-engineered scaffold based on the measurements taken under the arthroscope, and then directly implanted the scaffold using a sleeve. A honeycomb-shaped fixator was used to implant absorbable nails to fix the scaffold. After the scaffold was installed, the knee was repeatedly flexed and extended for 10-20 times to ensure stability and range of motion. Finally, the arthroscope was withdrawn and the wound was closed. RESULTS: Decalcified cortex-cancellous bone scaffolds possessed unparalleled advantages over synthetic materials in terms of morphology and biomechanics. The cancellous bone part of the scaffold provided a three-dimensional, porous space for cell growth, while the cortical bone part offered the necessary mechanical strength. The surgery was performed entirely under arthroscopy to minimize invasiveness to the patient. Absorbable pins were used for fixation to ensure the stability of the scaffold. This technique could effectively improve the prognosis of the patients with cartilage injuries and standardized the surgical procedures for arthroscopic tissue-engineered scaffold operations in the patients with cartilage damage. CONCLUSION With the standard arthroscopic tissue-engineered scaffold repair technique, it is possible to successfully repair damaged cartilage, alleviate symptoms in the short term, and provide a more ideal long-term prognosis. The author and their team explain the surgical procedures for tissue-engineered scaffolds under arthroscopy, with the aim of guiding future clinical practice.
Tissue Engineering/methods* ; Humans ; Tissue Scaffolds ; Arthroscopy/methods* ; Cartilage, Articular/surgery*

Enamel demineralization, the formation of white spot lesions, is a common issue in clinical orthodontic treatment. The appearance of white spot lesions not only affects the texture and health of dental hard tissues but also impacts the health and aesthetics of teeth after orthodontic treatment. The prevention, diagnosis, and treatment of white spot lesions that occur throughout the orthodontic treatment process involve multiple dental specialties. This expert consensus will focus on providing guiding opinions on the management and prevention of white spot lesions during orthodontic treatment, advocating for proactive prevention, early detection, timely treatment, scientific follow-up, and multidisciplinary management of white spot lesions throughout the orthodontic process, thereby maintaining the dental health of patients during orthodontic treatment.
Humans ; Consensus ; Dental Caries/etiology* ; Dental Enamel/pathology* ; Tooth Demineralization/etiology* ; Tooth Remineralization

OBJECTIVE: To assess the independent and combined effects of air pollutants, meteorological factors, and greenspace exposure on new tuberculosis (TB) cases. METHODS: TB case data from Shanghai (2013-2018) were obtained from the Shanghai Center for Disease Control and Prevention. Environmental data on air pollutants, meteorological variables, and greenspace exposure were obtained from the National Tibetan Plateau Data Center. We employed a distributed-lag nonlinear model to assess the effects of these environmental factors on TB cases. RESULTS: Increased TB risk was linked to PM _2.5, PM ₁₀, and rainfall, whereas NO ₂, SO ₂, and air pressure were associated with a reduced risk. Specifically, the strongest cumulative effects occurred at various lags: PM _2.5 ( RR = 1.166, 95% CI: 1.026-1.325) at 0-19 weeks; PM ₁₀ ( RR = 1.167, 95% CI: 1.028-1.324) at 0-18 weeks; NO ₂ ( RR = 0.968, 95% CI: 0.938-0.999) at 0-1 weeks; SO ₂ ( RR = 0.945, 95% CI: 0.894-0.999) at 0-2 weeks; air pressure ( RR = 0.604, 95% CI: 0.447-0.816) at 0-8 weeks; and rainfall ( RR = 1.404, 95% CI: 1.076-1.833) at 0-22 weeks. Green space exposure did not significantly impact TB cases. Additionally, low temperatures amplified the effect of PM _2.5 on TB. CONCLUSION Exposure to PM _2.5, PM ₁₀, and rainfall increased the risk of TB, highlighting the need to address air pollutants for the prevention of TB in Shanghai.
China/epidemiology* ; Humans ; Air Pollutants/analysis* ; Tuberculosis/epidemiology* ; Incidence ; Meteorological Concepts ; Particulate Matter/adverse effects* ; Environmental Exposure ; Male ; Female ; Adult ; Air Pollution ; Middle Aged

OBJECTIVE: CRISPR-Cas protects bacteria from exogenous DNA invasion and is associated with bacterial biofilm formation and pathogenicity. METHODS: We analyzed the type I-F CRISPR-Cas system of Legionella pneumophila WX48, including Cas1, Cas2-Cas3, Csy1, Csy2, Csy3, and Cas6f, along with downstream CRISPR arrays. We explored the effects of the CRISPR-Cas system on the in vitro growth, biofilm-forming ability, and pathogenicity of L. pneumophila through constructing gene deletion mutants. RESULTS: The type I-F CRISPR-Cas system did not affect the in vitro growth of wild-type or mutant strains. The biofilm formation and intracellular proliferation of the mutant strains were weaker than those of the wild type owing to the regulation of type IV pili and Dot/Icm type IV secretion systems. In particular, Cas6f deletion strongly inhibited these processes. CONCLUSION The type I-F CRISPR-Cas system may reduce biofilm formation and intracellular proliferation in L. pneumophila.
Legionella pneumophila/pathogenicity* ; CRISPR-Cas Systems ; Biofilms/growth & development* ; Phenotype ; Bacterial Proteins/metabolism* ; Gene Deletion

Depression is a major cause of disability and has adverse effects.Despite the many types of anti-depressants,clinical treatments of depression remain poor.Therefore,novel anti-depressant mechanisms need to be explored.The beneficial effects of irisin on the nervous system are gradually being elucidated,and studies have found that irisin has an anti-depressant effect,which may become a new treatment for depression.This study explored the mechanism of irisin and its upstream and downstream anti-depressants by reviewing the existing studies explaining the link between irisin and depression,and proposes that SIRT1/PGC-1α may mediate FNDC5/irisin to regulate BDNF to promote neurogenesis and improve depression,which provides a new idea to study irisin and its upstream and downstream anti-depressants.

Objective Preliminary exploration of the effects of modified electroconvulsive therapy(MECT)on cognitive function and gender differences in middle-aged and young patients with depressive episodes.Methods A group of middle-aged and young patients with depressive episodes,who were admitted to Beijing Anding Hospital affiliated to Capital Medical University,completed 6 rounds of MECT.The 17-item Hamilton depression scale(HAMD-17),Hamilton anxiety scale(HAMA),and repetitive battery for the assessment of neuropsychological status(RBANS)were used to score depressive symptoms,anxiety symptoms,and cognitive function at baseline,after the 3rd MECT,and after the 6th MECT,respectively.Gender differences were compared between the young and middle-aged groups.Results A total of 122 patients with depressive episodes were included,with 83 cases in the youth group and 39 cases in the middle-aged group.There was no gender difference in baseline HAMD and HAMA scores,as well as the HAMD reduction rates after MECT between the two groups(P>0.05).Repeated measures ANOVA showed that in the youth group,the time effects of RBANS total score,visual breadth factor score,and attention factor score were significant(P<0.05),and increased after treatment compared to baseline.There was no significance in gender group effects or interaction effects(P>0.05).In the middle-aged group,the time and gender interaction effect of RBANS total score and visual breadth factor score was significant(P<0.05).Female patients showed an increase in RBANS total score,visual breadth factor score,and attention factor score after the 6th MECT compared to baseline(P<0.05),while there was no significance in time effect and gender group effect(P>0.05).Conclusion Middle-aged and young depressed patients showed overall improvement in cognitive function after MECT,while there were gender differences in cognitive function changes among middle-aged patients.It is necessary to optimize the MECT program based on the patient's gender and age characteristics to reduce cognitive impairment.