Lathyrol reduces the RCC invasion and incidence of EMT via affecting the expression of AR and SPHK2 in RCC mice.

OBJECTIVE: To investigate the effects of Lathyrol on the expression of androgen receptor (AR) and sphingosine kinase 2 (SPHK2) in renal cell carcinoma (RCC) mice and to further explore the mechanism by which Lathyrol inhibits the invasion and incidence of epithelial-mesenchymal transition (EMT). METHODS: An RCC xenograft mouse model was constructed, and the mice were randomly divided into a model group, an experiment group and a negative control group. The experiment group was intragastrically gavaged with Lathyrol solution (20 mg/kg), the model group was intragastrically gavaged with 0.9% NaCl (same volume as that used in the experiment group), and the negative control group was injected intraperitoneally with 2 mg/kg cisplatin aqueous solution. Changes in the body weight and tumor volume of the mice were recorded. Western blot (WB) was used to assess the protein expression levels of AR, p-AR, CYP17A1, PARP1, E-cadherin, N-cadherin, vimentin, α-SMA, ß-catenin, and ZO-1. Protein expression levels of SPHK2, metal matrix protease 2 (MMP2), MMP9 and urokinase-type plasminogen activator (uPA) in tumor tissues were assessed by immunohistochemistry (IHC). AR expression in tumor tissues was assessed after immunofluorescence (IF) staining. RESULTS: After 14 days of drug administration, compared with that in the model group, the tumor volumes in the negative control and experiment groups were lower; the difference in tumor volume among the model, control and experiment groups was statistically significant (P < 0.05). The differences in body weight among the three groups were not statistically significant (P > 0.05). In the model group, the protein expression levels of AR, p-AR, CYP17A1, SPHK2, and PARP1 were relatively increased, the protein expression levels of E-cadherin and ZO-1 were relatively reduced (P < 0.05), and the protein expression levels of N-cadherin, ß-catenin, vimentin, and α-SMA were relatively increased (P < 0.05). In the negative control and experiment groups, the protein expression levels of AR, p-AR, CYP17A1, SPHK2, and PARP1 were relatively decreased (P < 0.05), the protein expression levels of E-cadherin and ZO-1 were relatively increased (P < 0.05), and the protein expression levels of N-cadherin, ß-catenin, vimentin and α-SMA were relatively decreased (P < 0.05). CONCLUSION: Lathyrol and cisplatin inhibit the proliferation of RCC xenografts, reduce the protein expression levels of AR, CYP17A1, SPHK2, PARP1, E-cadherin, and ZO-1 in tumor tissues (P < 0.05), and promote the protein expression levels of N-cadherin, ß-catenin, vimentin and α-SMA (P < 0.05). Therefore, Lathyrol reduces RCC invasion and EMT by affecting the expression of AR and SPHK2 in RCC mice.

Real-time coloration control of gallium-based strips through cold rolling.

Cold rolling has been used as a real-time surface oxidation control method to create colored strips on flexible substrates. By controlling the extrusion rate in real time, a variety of colored strips have been fabricated on Ga-based liquid metal (LM) strips. X-ray photoelectron spectroscopy (XPS) analysis shows that the surfaces of the colored strips, which were obtained through extrusion rate control of LM-Al, consist primarily of metal oxide composites, including Ga2O3, Ga2O, Al2O3, SnO2, and In2O3. The colors of the strip surfaces are directly correlated with the oxide film thickness. Additionally, these cold-rolled colored thin strips demonstrate high conductivity and have significant potential for use as conductive flexible components with indicator functions in the flexible electronics realm.

Fatty acid de novo biosynthesis in plastids: Key enzymes and their critical roles for male reproduction and other processes in plants.

Fatty acid de novo biosynthesis in plant plastids is initiated from acetyl-CoA and catalyzed by a series of enzymes, which is required for the vegetative growth, reproductive growth, seed development, stress response, chloroplast development and other biological processes. In this review, we systematically summarized the fatty acid de novo biosynthesis-related genes/enzymes and their critical roles in various plant developmental processes. Based on bioinformatic analysis, we identified fatty acid synthase encoding genes and predicted their potential functions in maize growth and development, especially in anther and pollen development. Finally, we highlighted the potential applications of these fatty acid synthases in male-sterility hybrid breeding, seed oil content improvement, herbicide and abiotic stress resistance, which provides new insights into future molecular crop breeding.

Intelligent Assist Office Blood Pressures (IOBP) versus awake ambulatory monitoring and conventional auscultatory office readings in Chinese primary medical institutions.

To practice standardized office blood pressure (OBP) measurement guidelines pragmatically, we developed an intelligent assisted OBP (IOBP) measurement system in the Chinese community, which can automatically obtain two or three BP values after a 5-min rest before the patients visit the doctor and transfer values to the community medical network in real time. We conducted a comparative study to investigate the agreement among IOBP, awake ambulatory BP (ABP), and conventional auscultatory OBP at different BP levels. Participants were divided into three groups according to BP, with 120/80 mmHg and 160/100 mmHg as the cut-off points. Attended IOBP, unattended IOBP, and auscultatory OBP were randomly measured before ABP monitoring. In total, 245 participants were included in the analysis. The mean systolic attended/unattended IOBP, auscultatory OBP, and awake ABP were 135.0, 136.7, 135.6, and 136.2 mmHg, respectively. Bland-Altman analysis revealed a bias of -1.1 and 0.5 mmHg for systolic attended/unattended IOBP compared with awake ABP in the overall sample. For auscultatory OBP, the bias was -0.4 (attended) and 1.2 mmHg (unattended). The discrepancy between the systolic attended/unattended IOBP and awake ABP was inconsistent at different BP levels. In Group 1 the values were -8.4 and -6.9 mmHg, whereas in Group 3, the values were 9.4 and 10.0 mmHg. BP measured using the IOBP measurement system was in accordance with awake ABP and conventional OBP, and can be a good choice in the Chinese community.

Longtime evolution and stationary response of a stochastic tumor-immune system with resting T cells.

In this paper, we take the resting T cells into account and interpret the progression and regression of tumors by a predator-prey like tumor-immune system. First, we construct an appropriate Lyapunov function to prove the existence and uniqueness of the global positive solution to the system. Then, by utilizing the stochastic comparison theorem, we prove the moment boundedness of tumor cells and two types of T cells. Furthermore, we analyze the impact of stochastic perturbations on the extinction and persistence of tumor cells and obtain the stationary probability density of the tumor cells in the persistent state. The results indicate that when the noise intensity of tumor perturbation is low, tumor cells remain in a persistent state. As this intensity gradually increases, the population of tumors moves towards a lower level, and the stochastic bifurcation phenomena occurs. When it reaches a certain threshold, instead the number of tumor cells eventually enter into an extinct state, and further increasing of the noise intensity will accelerate this process.

Ynamide Coupling Reagents: Origin and Advances.

Since the pioneering work of Curtius and Fischer, chemical peptide synthesis has witnessed a century's development and evolved into a routine technology. However, it is far from perfect. In particular, it is challenged by sustainable development because the state-of-the-art of peptide synthesis heavily relies on legacy reagents and technologies developed before the establishment of green chemistry. Over the past three decades, a broad range of efforts have been made for greening peptide synthesis, among which peptide synthesis using unprotected amino acid represents an ideal and promising strategy because it does not require protection and deprotection steps. Unfortunately, C → N peptide synthesis employing unprotected amino acids has been plagued by undesired polymerization, while N → C inverse peptide synthesis with unprotected amino acids is retarded by severe racemization/epimerization owing to the iterative activation and aminolysis of high racemization/epimerization susceptible peptidyl acids. Consequently, there is an urgent need to develop innovative coupling reagents and strategies with novel mechanisms that can address the long-standing notorious racemization/epimerization issue of peptide synthesis.This Account will describe our efforts in discovery of ynamide coupling reagents and their application in greening peptide synthesis. Over an eight-year journey, ynamide coupling reagents have evolved into a class of general coupling reagents for both amide and ester bond formation. In particular, the superiority of ynamide coupling reagents in suppressing racemization/epimerization enabled them to be effective for peptide fragment condensation, and head-to-tail cyclization, as well as precise incorporation of thioamide substitutions into peptide backbones. The first practical inverse peptide synthesis using unprotected amino acids was successfully accomplished by harnessing such features and taking advantage of a transient protection strategy. Ynamide coupling reagent-mediated ester bond formation enabled efficient intermolecular esterification and macrolactonization with preservation of α-chirality and the configuration of the conjugated α,ß-C-C double bond. To make ynamide coupling reagents readily available with reasonable cost and convenience, we have developed a scalable one-step synthetic method from cheap starting materials. Furthermore, a water-removable ynamide coupling reagent was developed, offering a column-free purification of the target coupling product. In addition, the recycle of ynamide coupling reagent was accomplished, thereby paving the way for their sustainable industrial application.As such, this Account presents the whole story of the origin, mechanistic insights, preparation, synthetic applications, and recycle of ynamide coupling reagents with a perspective that highlights their future impact on peptide synthesis.

Inverse Peptide Synthesis Using Transient Protected Amino Acids.

Peptide therapeutics have experienced a rapid resurgence over the past three decades. While a few peptide drugs are biologically produced, most are manufactured via chemical synthesis. The cycle of prior protection of the amino group of an α-amino acid, activation of its carboxyl group, aminolysis with the free amino group of a growing peptide chain, and deprotection of the N-terminus constitutes the principle of conventional C → N peptide chemical synthesis. The mandatory use of the Nα-protecting group invokes two additional operations for incorporating each amino acid, resulting in poor step- and atom-economy. The burgeoning demand in the peptide therapeutic market necessitates cost-effective and environmentally friendly peptide manufacturing strategies. Inverse peptide chemical synthesis using unprotected amino acids has been proposed as an ideal and appealing strategy. However, it has remained unsuccessful for over 60 years due to severe racemization/epimerization during N → C peptide chain elongation. Herein, this challenge has been successfully addressed by ynamide coupling reagent employing a transient protection strategy. The activation, transient protection, aminolysis, and in situ deprotection were performed in one pot, thus offering a practical peptide chemical synthesis strategy formally using unprotected amino acids as the starting material. Its robustness was exemplified by syntheses of peptide active pharmaceutical ingredients. It is also amenable to fragment condensation and inverse solid-phase peptide synthesis. The compatibility to green solvents further enhances its application potential in large-scale peptide production. This study offered a cost-effective, operational convenient, and environmentally benign approach to peptides.

Biomimetic Design of a New Semi-Rigid Spatial Mesh Antenna Reflector.

The reflective surface accuracy (RSA) of traditional space mesh antennas typically ranges from 0.2 to 6 mmRMS. To improve the RSA, an active control scheme can be employed, although it presents challenges in determining the installation position of the actuator. In this study, we propose a novel design for a semi-rigid cable mesh that combines rigid members and a flexible woven mesh, drawing inspiration from both rigid ribbed antennas and biomimicry. Initially, we investigate the planar mesh topology of spider webs and determine the bionic cable surface's mesh topology based on the existing hexagonal meshing method, with RSA serving as the evaluation criterion. Subsequently, through motion simulations and careful observation, we establish the offset angle as the key design parameter for the bionic mesh and complete the design of the bionic cable mesh accordingly. Finally, by analyzing the impact of the node quantity on RSA, we determine a layout scheme for the flexible woven mesh with a variable number of nodes, ultimately settling for 26 nodes. Our results demonstrate that the inclusion of numerous rigid components on the bionic cable mesh surface offers viable installation positions for the actuator of the space mesh antenna. The reflector accuracy achieved is 0.196 mmRMS, slightly surpassing the lower limit of reflector accuracy observed in most traditional space-space mesh antennas. This design presents a fresh research perspective on combining active control schemes with reflective surfaces, offering the potential to enhance the RSA of traditional rigid rib antennas to a certain extent.

Survival benefit of adjuvant chemotherapy after resection of Stage I lung adenocarcinoma containing micropapillary components.

BACKGROUND: The usefulness of postoperative adjuvant chemotherapy (ACT) for patients with stage I lung adenocarcinoma with micropapillary (MIP) components remains unclear. We analyzed whether postoperative ACT could reduce recurrence in patients with stage I lung adenocarcinoma with MIP components, thereby improving their overall survival (OS) and disease-free survival (DFS). METHODS: Data for patients with pathologically confirmed stage I lung adenocarcinoma with MIP components from January 2012 to December 2018 were retrospectively analyzed. OS and DFS were analyzed in groups and subgroups. RESULTS: Overall, 259 patients were enrolled. Patients who received ACT in stage IA showed significantly better survival than did those with no-adjuvant chemotherapy (NACT); (5-year OS 89.4% vs. 73.6%, p < 0.001; 5-year DFS 87.2% vs. 66.0%, p = 0.008). A difference was also observed for in-stage IB patients (5-year OS 82.0% vs. 51.8%, p = 0.001; 5-year DFS 76.0% vs. 41.11 %, p = 0.004). In subgroup analysis based on the proportion of MIP components, patients with 1%-5% MIP components had a significantly better prognosis in the ACT group than in the NACT group (5-year OS 82.4% vs. 66.0%, p = 0.005; 5-year DFS 76.5% vs. 49.1%, p = 0.032). A similar difference was observed for patients with MIP ≥5% (5-year OS 80.7% vs. 47.8%, p = 0.009; 5-year DFS 73.11% vs. 43.5%, p = 0.007). CONCLUSION: Among patients with stage I lung adenocarcinoma with MIP components, those who received ACT showed significant survival benefits compared to those without ACT. Patients with lung adenocarcinoma with MIP components could benefit from ACT when the MIP was ≥1%.

Clinical implications and predictive value of the creatinine­cystatin C ratio in patients with multiple myeloma and renal impairment.

The creatinine (Cr)-cystatin C ratio (CCR) at the time of cancer diagnosis is associated with survival; however, to the best of our knowledge, the association between this ratio and mortality in patients with multiple myeloma and renal impairment (RI) is unclear. Therefore, the present study aimed to assess this association, as well as disease prognosis and the clinical significance of the CCR in patients with multiple myeloma and RI. The present retrospective study included 191 patients diagnosed with multiple myeloma and RI between 2012 and 2022. The predictive value of the CCR was evaluated using area under the receiver operating characteristic curve (AUC) values. The factors affecting overall survival (OS) were assessed using uni- and multivariate logistic regression analyses. The effect of the CCR on survival was evaluated using a Cox regression model and the Kaplan-Meier method. There was a significant association between low CCR and poor progression-free survival (PFS) and overall survival (OS). The 1-, 2- and 3-year PFS and OS rates in patients with a low CCR were significantly lower than those in patients with a high CCR. The 1-, 2- and 3-year AUC values of the CCR were 0.712, 0.764 and 0.746 respectively. Multivariate analysis revealed sex, age, Cr levels, CCR and C-reactive protein levels as independent prognostic factors affecting OS rates. The CCR is a potential prognostic indicator in patients with multiple myeloma with RI and is associated with clinical stages.

Safety and efficacy of remote ischemic conditioning for spontaneous intracerebral hemorrhage (SERIC-ICH): A multicenter, randomized, parallel-controlled clinical trial study design and protocol.

BACKGROUND: Previous studies have revealed that remote ischemic conditioning (RIC) may have a neuroprotective function. However, the potential benefit of RIC for patients with ICH remain unclear. OBJECTIVE: The primary aim of this study is to assess the safety and efficacy of RIC for patients with ICH. METHODS: The Safety and Efficacy of RIC for Spontaneous ICH (SERIC-ICH) is an ongoing prospective, randomized, multicenter, parallel-controlled, and blinded-endpoint clinical trial. The study will enroll an estimated 2000 patients aged ⩾18 years within 24 h after ICH onset, with National Institutes of Health Stroke Scale ⩾6 and Glasgow Coma Scale ⩾8 upon presentation. The patients will be randomly assigned to the RIC or control groups (1:1) and will be treated with cuffs inflated to a pressure of 200 or 60 mmHg, respectively, twice daily for 7 days. Each RIC treatment will consist of four cycles of arm ischemia for 5 min, followed by reperfusion for another 5 min, for a total procedure time of 35 min. The primary efficacy outcome measure is the proportion of patients with good functional outcomes (modified Rankin scale 0-2) at 180 days. The safety outcome measures will include all adverse events and severe adverse events occurring in the course of the study. DISCUSSION: RIC is an inexpensive intervention and might be a strategy to improve outcomes in patients with ICH. The SERIC-ICH trial will investigate whether RIC treatment can be applied as an adjuvant treatment in the acute phase of ICH and identify safety issues.

Enacted Stigma Influences Bereavement Coping Among Children Orphaned by Parental AIDS: A Longitudinal Study with Network Analysis.

Purpose: The study aims to understand how enacted stigma influences bereavement coping at the style (scale) level and the specific pathways at the strategy (item) level. Methods: The longitudinal data of 755 children orphaned by parental Acquired Immune Deficiency Syndrome (AIDS) in rural China were used. Grief processing and deliberate grief avoidance were measured at wave 1 (baseline) and wave 2 (one-year follow-up) to reflect bereavement coping in the contexts of being with family members, being with friends, being with community members, and being alone. Enacted stigma that measured at wave 1 was used to assess the experienced stigma of these AIDS-orphaned children. Network analyses were run following regressions. Results: Controlling for demographics and baseline-level bereavement coping, multivariate regressions revealed that enacted stigma at wave 1 significantly predicted grief processing and deliberate grief avoidance at wave 2. Network analyses showed that, for grief processing, stigma increased searching for meaning alone and with friends and expressing feelings to community members, which then provoked the same strategy across contexts. Meanwhile, stigma triggered the deliberate grief avoidance network by initially suppressing the expression of feelings to community members. Conclusion: Enacted stigma contributes to bereavement coping. Stigma stirs up complex feelings but forces AIDS-orphaned children to suppress expressions, and it increases needs to process grief through meaning making but cuts supporting forces by promoting avoidance. Interventions are imperative to reduce stigma, improve emotion regulation, and facilitate meaning making for people bereaved by stigmatized deaths.

The Combined Effects of Hourly Multi-Pollutant on the Risk of Ambulance Emergency Calls: A Seven-Year Time Series Study.

BACKGROUND: Ambulance emergency calls (AECs) are seen as a more suitable metric for syndromic surveillance due to their heightened sensitivity in reflecting the health impacts of air pollutants. Limited evidence has emphasized the combined effect of hourly air pollutants on AECs. This study aims to investigate the combined effects of multipollutants (i.e., PM2.5, PM10, Ozone, NO2, and SO2) on all-cause and cause-specific AECs by using the quantile g-computation method. METHODS: We used ambulance emergency dispatch data, air pollutant data, and meteorological data from between 1 January 2013 and 31 December 2019 in Shenzhen, China, to estimate the associations of hourly multipollutants with AECs. We followed a two-stage analytic protocol, including the distributed lag nonlinear model, to examine the predominant lag for each air pollutant, as well as the quantile g-computation model to determine the associations of air pollutant mixtures with all-cause and cause-specific AECs. RESULTS: A total of 3,022,164 patients were identified during the study period in Shenzhen. We found that each interquartile range increment in the concentrations of PM2.5, PM10, Ozone, NO2, and SO2 in 0-8 h, 0-8 h, 0-48 h, 0-28 h, and 0-24 h was associated with the highest risk of AECs. Each interquartile range increase in the mixture of air pollutants was significantly associated with a 1.67% (95% CI, 0.12-3.12%) increase in the risk of all-cause AECs, a 1.81% (95% CI, 0.25-3.39%) increase in the risk of vascular AECs, a 1.77% (95% CI, 0.44-3.11%) increase in reproductive AECs, and a 2.12% (95% CI, 0.56-3.71%) increase in AECs due to injuries. CONCLUSIONS: We found combined effects of pollutant mixtures associated with an increased risk of AECs across various causes. These findings highlight the importance of targeted policies and interventions to reduce air pollution, particularly for PM, Ozone, and NO2 emissions.

Optimal Treatment Strategies for Resectable Locally Advanced Esophageal Squamous Cell Carcinoma: A Real-World Triple Cohort Analysis Using Propensity Score Matching.

Purpose: This study aims to identify the most effective treatment approach and compares the survival rates, along with complications, in patients with locally resectable esophageal squamous cell carcinoma (ESCC) who were treated with one of the three treatment patterns: neoadjuvant chemotherapy followed by surgery (NCT+S), neoadjuvant chemoradiotherapy followed by surgery (NCRT+S), or surgery followed by chemoradiotherapy (S+CRT). Methods: We conducted a retrospective analysis of the medical records of ESCC patients who received one of these treatments between March 2015 and March 2022. This analysis aimed to identify differences in long-term survival, pathological responses, and complications across the three treatment groups. To address potential confounding factors, propensity score matching (PSM) and Cox proportional hazards models were utilized. Results: This study included a cohort of 715 patients: 197 in the NCT+S group, 188 in the NCRT+S group, and 330 in the S+CRT group, all meeting the selection criteria. After PSM, the median disease-free survival (DFS) time was 38.9 months, 25.6 months, and 15.3 months for NCRT+S, NCT+S, and S+CRT groups, respectively. There were statistically significant differences in the 5-year DFS and 5-year OS among the three groups (P=0.04 and P=0.02, post-matching, respectively). Notably, neoadjuvant therapy showed a correlation with increased postoperative anastomotic leakage rates (17.5% in NCRT+S, 10% in NCT+S, and 5% in S+CRT; P=0.03, post-matching), regardless of the PSM adjustment. Conclusion: The findings indicate that neoadjuvant therapy before surgery offers a significant survival advantage over postoperative adjuvant therapy for patients with locally advanced resectable ESCC. Despite similar safety profiles, neoadjuvant therapy appears to be associated with a higher incidence of anastomotic leakage after surgery.

Administration of a glypican-3 peptide increases the infiltration and cytotoxicity of CD8+ T cells against testicular yolk sac tumor, associated with enhancing the intratumoral cGAS/STING signaling.

BACKGROUND: Glypican-3 (GPC3) is highly expressed in testicular yolk sac tumor (TYST). GPC3 has been evaluated as a cancer vaccine for some types of tumors, but little is known on the effects of GPC3 peptide-based therapy on TYST. Here, we evaluated the antitumor effect of GPC3144-152 on TYST and its potential mechanisms. METHODS: GPC3144-152 -specific CD8+ T cells were induced by vaccine immunization and examined by ELISPOT. The CD8+ T cells were purified for testing their cytotoxicity in vitro against TYST cells by CCK-8 and TUNEL assays and in vivo against tumor growth. The influence of GPC3144-152 loading and/or cGAS silencing on the tumor growth, apoptosis and cGAS/STING signaling was tested by immunohistochemistry, immunofluorescence, flow cytometry, and Western blot. RESULTS: Vaccination with GPC3144-152 induced tumor-specific CD8+ T cells that secreted high levels of IFN-γ and granzyme B, and had potent cytotoxicity against TYST in a dose-dependent manner. Adoptive transfer of CD8+ T cells and treatment with GPC3144-152 significantly inhibited the growth of TYST tumors, but less effective for cGAS-silenced TYST tumors in vivo. Treatment with GPC3144-152 enhanced the infiltration of CD8+ T cells into the tumor environment and their cytotoxicity against TYST tumors in vivo by up-regulating granzyme B and IFN-ß expression, but down-regulating GPC3 expression in the tumors. Co-culture of CD8+ T cells with TYST in the presence of exogenous GPC3144-152 enhanced peptide-specific CD8+ T-cell cytotoxicity in vitro, accompanied by enhancing cGAS, γH2AX, TBK1, and IRF3 phosphorylation in TYST cells, but less effective in cGAS-silenced TYST cells. CONCLUSIONS: These data indicated that GPC3 peptide-specific CD8+ T cells had potent antitumor activity against TYST tumor, particularly for combined treatment with the peptide, which was partially dependent on the intratumoral cGAS/STNG signaling. GPC3 peptide vaccine may be valuable for the combination treatment of TYST.

Ovotesticular Disorder of Sex Development Presenting as a Scrotal Emergency.

Ovotesticular (OT) disorder of sex development (DSD) is a rare condition that affects the development of reproductive organs and manifests in a wide range of phenotypic presentations. The clinical diagnosis of this condition is challenging because of its atypical nature, and the variability of presentation in 46,XX OT-DSD cases makes it a complex issue in medical practice. We report a case of a 13-year-old boy who presented with left scrotal pain. Further exploration revealed a tunica rupture without testicular torsion of the left testis, whereas the histopathological analysis of a nodule excised from the right testis indicated the presence of ovotestis tissues. A second nonemergent surgery preserved the testicular tissues as the ovarian tissue in both gonads was excised. After 22 months of follow-up, the patient's testes produced normal testosterone levels sustained over time without any exogenous supplementation. This case reveals that, in male children who present with an acute scrotal disease as adolescents, the gonads should be retained until the etiology is confirmed, and the possibility of OT-DSD should be considered.

Comparative Efficacy and Safety of Neoadjuvant Immunotherapy with Chemotherapy versus Chemotherapy Alone in Non-Small Cell Lung Cancer: A Propensity Score and Inverse Probability Treatment Weighting Analysis.

Purpose: This study aimed to compare the efficacy and safety of neoadjuvant chemotherapy (NCT) and neoadjuvant immunotherapy combined with chemotherapy (NICT) combined with radical lung cancer resection for the treatment of patients with resectable non-small cell lung cancer (NSCLC). To adjust for confounding factors, we innovatively adopted two matching methods: propensity score (PS) and inverse probability of treatment weighting (IPTW). Patients and Methods: We conducted a retrospective analysis of the clinicopathological features and prognosis of patients with resectable NSCLC treated with NCT or NICT combined with radical lung cancer resection using propensity score matching (PSM) at a ratio of 1:1 and IPTW to balance potential bias. Results: After PSM, 116 pairs of patients who had undergone NCT or NICT were selected for the final analysis. The pathological complete remission (pCR) and major pathological remission (MPR) rates were significantly better in the NICT group than in the NCT group (pCR rate of 44.8% vs 2.6%, P< 0.001; MPR rate of 66.4% vs 20.7%, P< 0.001). No significant difference was seen between the NICT and NCT groups in terms of postoperative complications (12.1% vs 9.5%, P=0.182). Patients in the NICT group had significantly better disease-free survival (DFS) and overall survival(OS) than those in the NCT group ([3-year DFS: 75.2% vs 43.3%, P< 0.001] and [3-year OS: 91.5% vs 58.0%, P< 0.001]). Among all patients, those with postoperative pathology of pCR had better DFS (P< 0.001) and OS (P= 0.009). Patients with postoperative pathology of MPR had better DFS (P< 0.001) and OS (P< 0.001). The IPTW method yielded similar pathologic and prognostic results. Conclusion: Patients with resectable NSCLC treated with NICT had better pathological responses and prognosis, than those treated with NCT, and the safety profiles of NICT and NCT were similar.

Comparison of Neoadjuvant Immunotherapy Plus Chemotherapy versus Neoadjuvant Chemoradiotherapy for Patients with Esophageal Squamous Cell Carcinoma: A Propensity Score Matching Study.

Purpose: This study compares the efficacy and safety of neoadjuvant immunotherapy combined with chemotherapy (NICT) and neoadjuvant chemoradiotherapy (NCRT) combined with radical esophagectomy in patients with resectable, locally advanced esophageal squamous cell cancer (ESCC). Patients and Methods: Patients with locally advanced ESCC treated with NICT or NCRT combined with esophagectomy between March 2016 and May 2022 were retrospectively analyzed and propensity score matched (PSM) in a 1:2 ratio to balance potential bias. Results: After PSM, 110 patients who received NCRT and 55 patients who received NICT were selected for the final analysis. The probability of tumor regression grade 0 and the rate of pathological complete remission (pCR) were significantly higher in the NCRT group than in the NICT group (57.3% vs 32.7%, P=0.003 and 48.2% vs 29.1%, P=0.030, respectively). The incidence of postoperative complications in the NCRT group was not significantly different from that in the NICT group (P=0.082). Patients in the NCRT group had significantly better disease-free survival (DFS) and overall survival (OS) than those in the NICT group (12-month DFS rate: 94.3% vs 81.8%, P=0.006; 12-month OS rate: 100.0% vs 95.4%, P=0.032). However, the results of the 24-month follow-up showed that there was also a statistically significant difference in DFS between the two groups. Patients with postoperative pCR had a longer DFS (P< 0.001). Conclusion: Short-term follow-up results show that NCRT has a significantly better pathologic response and prognosis than NICT in the treatment of patients with locally advanced ESCC. NCRT and NICT have similar safety profiles.

Approach to Seven-Membered Carbocycles via a Lewis Acid Catalyzed Intramolecular Michael Addition of Allenone.

A straightforward strategy for constructing seven-membered carbocycles by employing a Lewis acid catalyzed intramolecular Michael addition of allenones is reported. It offers atom-economic access to synthetically important furan-fused bi- or tricyclic frameworks containing seven-membered carbocycles, which are widely found in natural products possessing various bioactivities. A number of seven-membered carbocycle-containing polycyclic frameworks bearing diverse functional groups were prepared in good to excellent yields. Furthermore, the application potential of this strategy was exemplified by the construction of the key skeletons of Caribenol A and Frondosin B.