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In the past two decades, oxidative stress (OS) has drawn a lot of interest due to the revelation that individuals with many persistent disorders including diabetes, polycystic ovarian syndrome (PCOS), cardiovascular, and other disorders often have aberrant oxidation statuses. OS has a close interplay with PCOS features such as insulin resistance, hyperandrogenism, and chronic inflammation; there is a belief that OS might contribute to the development of PCOS. PCOS is currently recognized as not only one of the most prevalent endocrine disorders but also a significant contributor to female infertility, affecting a considerable proportion of women globally. Therefore, the understanding of the relationship between OS and PCOS is crucial to the development of therapeutic and preventive strategies for PCOS. Moreover, the mechanistic study of intracellular reactive oxygen species/ reactive nitrogen species formation and its possible interaction with women’s reproductive health is required, which includes complex enzymatic and non-enzymatic antioxidant systems. Apart from that, our current review includes possible regulation of the pathogenesis of OS. A change in lifestyle, including physical activity, various supplements that boost antioxidant levels, particularly vitamins, and the usage of medicinal herbs, is thought to be the best way to combat this occurrence of OS and improve the pathophysiologic conditions associated with PCOS.

Aim: This micro-computed tomography (micro-CT) study aims to quantitatively analyze the dentinal microcracks formed and propagated after endodontic retreatment using different file systems. Methods: Forty extracted mandibular premolars were selected. Biomechanical preparation was done using ProTaper Next rotary files followed by obturation using lateral compaction technique. All specimens were randomly divided into four groups (n = 10) and scanned under 1172; Micro-CT (Skyscan Bruker, Kontich, Belgium). After scanning, the first group was retreated using Hedstrom (H) files (Dentsply Maillefer, Ballaigues, Switzerland), the second group with Gutta Percha Remover (GPR) files (Mani Inc., Japan), the third group with Endostar RE Re Endo Rotary system (RE Endo files) (Endostar RE, Poland), and fourth group with ProTaper Universal Retreatment (PTUR) files (Dentsply Maillefer, Ballaigues, Switzerland). A micro-CT scan was repeated of each sample to observe the newly formed and propagated microcracks. The micro-CT scans before and post retreatment were then evaluated using CT-analyzer software. Data were compared using the Chi-square test. Results: New microcracks formed post retreatment were maximum in the RE Endo group followed by the PTUR group, GPR group, and least in the H file group. Propagation of existing microcracks after retreatment was maximum in the RE Endo group followed by nearly similar in both the GPR group and PTUR group and least in the H file group. On comparing the frequency distribution of the newly formed and propagated microcracks, the Chi-square test showed similar distribution among all four groups, which was found statistically insignificant (P > 0.05). Conclusion: GPR rotary instrument group created the least new microcracks among tested retreatment rotary files. However, the propagation of microcracks was found comparable with the PTUR files.

Introduction: The current standard of care for patients with inoperable stage III non-small cell lung cancer includes chemoradiotherapy (CRT) followed by 1 year of checkpoint inhibitor (CPI) therapy. Nevertheless, the optimal duration of consolidation CPI remains unknown. Here, we characterized the relationship between circulating tumor DNA (ctDNA) minimal residual disease (MRD) and clinical outcomes of patients with unresectable locally advanced non-small cell lung cancer treated on a phase 2 trial of short-course consolidation immunotherapy after CRT, with the goal of testing whether ctDNA may be able to identify patients who do not require a full year of treatment., Methods: Plasma samples for ctDNA analysis were collected from patients on the Big Ten Cancer Research Consortium LUN 16-081 trial after completion of CRT, before day 1 of cycle 2 (C2D1) of CPI (i.e., 1 mo after treatment start), and at the end of up to 6 months of treatment. Tumor-informed ctDNA MRD analysis was performed using cancer personalized profiling by deep sequencing. Levels of ctDNA at each time point were correlated with clinical outcomes., Results: Detection of ctDNA predicted significantly inferior progression-free survival after completion of CRT (24-mo 29% versus 65%, p = 0.0048), before C2D1 of CPI (24-mo 0% versus 72%, p < 0.0001) and at the end of CPI (24-mo 15% versus 67%, p = 0.0011). In addition, patients with decreasing or undetectable ctDNA levels after 1 cycle of CPI had improved outcomes compared with patients with increasing ctDNA levels (24-mo progression-free survival 72% versus 0%, p < 0.0001). Progression of disease occurred within less than 12 months of starting CPI in all patients with increasing ctDNA levels at C2D1., Conclusions: Detection of ctDNA before, during, or after 6 months of consolidation CPI is strongly associated with inferior outcomes. Our findings suggest that analysis of ctDNA MRD may enable personalizing the duration of consolidation immunotherapy treatment., Competing Interests: Disclosure Dr. Durm receives support from Bristol-Myers Squibb; grants or contracts from AstraZeneca, Merck, and Mirati; consulting fees from Cook Biotech; payments or honoraria from Curio Science, DAVA Oncology, and AstraZeneca; and participates on an advisory board for Curio Science, DAVA oncology, and AstraZeneca. Dr. Ganti receives research grants or contracts from VA Office of Research and Development, Merck, TAB Biosciences, NEKTAR Therapeutics, Mirati Therapeutics, IOVANCE Therapeutics, and Apexigen; royalties or licenses from Oxford University Press; consulting fees from AstraZeneca, Flagship Biosciences, G1 Therapeutics, Jazz Pharmaceuticals, Cardinal Health, Mirati Therapeutics, Beigene Ltd., Sanofi Genzyme, Blueprint Medicines, and Regeneron Pharmaceuticals; payments or honoraria from MedLearning Group and Plexus Communications; participates on a data safety monitoring board for YmAbs Therapeutics; holds leadership or fiduciary roles at Academic and Community Cancer Research United and A Breath of Hope for Lung Cancer; and has received equipment or materials from Takeda Pharmaceuticals and Chimerx. Dr. Alizadeh receives research grants or contracts from the National Cancer Institute, National Heart, Lung and Blood Institute, National Institutes of Health, Celgene, Bristol-Myers Squibb, and Pfizer; consulting fees from ADCT, Celgene, Chugai, Genentech, Gilead, Janssen, Pharmacyclics, and Roche; has patents planned, issued, or pending with FortySeven Inc., Foresight Diagnostics, CiberMed Inc., and Roche; participates on a data safety monitoring board for Lymphoma Research Foundation; holds leadership or fiduciary roles at the American Society of Hematology, American Society of Clinical Oncology, American Society of Clinical Investigation, and Leukemia & Lymphoma Society; and has equity ownership interests in CiberMed Inc., Foresight Diagnostics, FortySeven Inc., and CARGO Therapeutics. Dr. Hanna receives grants or contracts from Merck, Genentech, Bristol-Myers Squibb, and Natera. Dr. Diehn receives grants or contracts from AstraZeneca and Varian Medical Systems; royalties or licenses from Roche and Foresight Diagnostics; consulting fees from AstraZeneca, Boehringer Ingelheim, Genentech, Illumina, Gritstone Bio, and Regeneron; payments or honoraria from Bristol-Myers Squibb, Japan, and Novartis; support for attending meetings or travel from Foresight Diagnostics and Regeneron; has patents planned, issued, or pending with Stanford University; holds leadership or fiduciary roles at Foresight Diagnostics; and holds stock or stock options in CiberMed Inc., Foresight Diagnostics, and Gritstone Bio. The remaining authors declare no conflict of interest., (Copyright © 2024 International Association for the Study of Lung Cancer. Published by Elsevier Inc. All rights reserved.)

Background: Immunotherapy using a checkpoint inhibitor (CPI) alone or in combination with chemotherapy is the standard of care for treatment-naive patients with advanced non-small cell lung cancer (NSCLC) without driver mutations for which targeted therapies have been approved. It is unknown whether continuing CPI treatment beyond disease progression results in improved outcomes., Methods: Patients who experienced progressive disease (PD) after a clinical benefit from chemotherapy plus a CPI were enrolled. Patients received pembrolizumab (200 mg every 3 weeks) plus next-line chemotherapy. The primary end point was progression-free survival (PFS) according to the Response Evaluation Criteria in Solid Tumors (version 1.1). Key secondary end points included the overall survival (OS), clinical benefit rate, and toxicity. The authors' hypothesis was that continuing pembrolizumab beyond progression would improve the median PFS to 6 months in comparison with a historical control of 3 months with single-agent chemotherapy alone., Results: Between May 2017 and February 2020, 35 patients were enrolled. The patient and disease characteristics were as follows: 51.4% were male; 82.9% were current or former smokers; and 74.3%, 20%, and 5.7% had adenocarcinoma, squamous cell carcinoma, and NSCLC not otherwise specified, respectively. The null hypothesis that the median PFS would be 3 months was rejected (p < .05). The median PFS was 5.1 months (95% confidence interval [CI], 3.6-8.0 months). The median OS was 24.5 months (95% CI, 15.6-30.9 months). The most common treatment-related adverse events were fatigue (60%), anemia (54.3%), and nausea (42.9%). There were no treatment-related deaths., Conclusions: Pembrolizumab plus next-line chemotherapy in patients with advanced NSCLC who experienced PD after a clinical benefit from a CPI was associated with statistically significant higher PFS in comparison with historical controls of single-agent chemotherapy alone., (© 2022 American Cancer Society.)

Background: Many patients with non-small-cell lung cancer (NSCLC) treated with immunotherapy experience immune-related adverse events (irAEs). Patients with metastatic NSCLC who receive checkpoint inhibitors (CPI) and experience irAEs generally receive fewer cycles of CPI without decreased efficacy. However, the association between irAEs and efficacy outcomes in patients with locally advanced NSCLC treated with curative intent with CPI after chemoradiation has never been reported. Here we report a retrospective analysis of the association between irAEs and efficacy outcomes from the Hoosier Cancer Research Network (HCRN) LUN 14-179 single-arm phase 2 trial of consolidation pembrolizumab after chemoradiation in patients with stage III NSCLC., Patients and Methods: A total of 92 eligible patients were enrolled from March 2015 to November 2016. Demographics, disease characteristics, and number of pembrolizumab cycles received were reported in patients with and without irAEs. Chi-square test was used for comparisons for categorical variables and Wilcoxon test for continuous variables. The Kaplan-Meier method was used to analyze time to metastatic disease or death (TMDD), progression-free survival (PFS), and overall survival (OS). A log-rank test was used to compare groups., Results: Any grade irAEs occurred in 55.4% of patients. There was no significant difference in number of pembrolizumab cycles received, TMDD, OS, or PFS in patients with and without irAEs. Patients who discontinued pembrolizumab early because of irAEs received significantly fewer cycles of pembrolizumab (5 vs 15, P = .0016) without a significant difference in TMDD, PFS, or OS. Similarly, patients who received immunosuppressive therapy received fewer numbers of cycles of pembrolizumab (4 vs 16, P < .001) without significantly reduced TMDD, PFS, or OS., Conclusion: irAEs due to pembrolizumab, regardless of grade or number of irAEs, were not associated with decreased efficacy outcomes. Furthermore, early discontinuation of pembrolizumab because of irAEs and/or treatment of irAEs with immunosuppressive therapy was not associated with a decrease in treatment efficacy., (Copyright © 2021 Elsevier Inc. All rights reserved.)

The treatment of advanced non-small-lung cancer (NSCLC) has steadily evolved over the past 2 decades, and current therapy includes chemoimmunotherapy or targeted therapy with tyrosine kinase inhibitors (TKIs). Angiogenesis inhibitors were first approved in the mid-2000s in combination with chemotherapy for the treatment of NSCLC. The addition of anti-angiogenics to chemotherapy resulted in modest increases in survival when median overall survival was less than 1 year. More recently, the use of anti-angiogenics has fallen out of favor with the advent of checkpoint inhibitors and never-before-seen durable long-term responses. However, we postulate that there is still an important role for anti-angiogenics in this era of targeted therapy and checkpoint inhibitors in the treatment of NSCLC. Preclinical studies have shown that combination blockade of the epidermal growth factor receptor (EGFR) and vascular endothelial growth factor (VEGF) pathways leads to synergistic antitumor effects. These results have been replicated in the clinical setting in patients who harbor EGFR mutations, with VEGF inhibitor-TKI dual therapy leading to impressive survival outcomes. Similarly, combination treatment with checkpoint inhibitors and VEGF inhibitors have led to unprecedented survival outcomes in both advanced renal cell cancer as well as NSCLC. In this review, we explore the evolution of anti-angiogenic therapy in advanced NSCLC and discuss the clinical efficacy of angiogenesis inhibitors in combination with chemotherapy, TKI therapy, and checkpoint inhibitors., (Published by Elsevier Inc.)

The epithelial surface is often proposed to actively participate in host defense, but evidence that this is the case remains circumstantial. Similarly, respiratory paramyxoviral infections are a leading cause of serious respiratory disease, but the basis for host defense against severe illness is uncertain. Here we use a common mouse paramyxovirus (Sendai virus) to show that a prominent early event in respiratory paramyxoviral infection is activation of the IFN-signaling protein Stat1 in airway epithelial cells. Furthermore, Stat1-/- mice developed illness that resembled severe paramyxoviral respiratory infection in humans and was characterized by increased viral replication and neutrophilic inflammation in concert with overproduction of TNF-alpha and neutrophil chemokine CXCL2. Poor control of viral replication as well as TNF-alpha and CXCL2 overproduction were both mimicked by infection of Stat1-/- airway epithelial cells in culture. TNF-alpha drives the CXCL2 response, because it can be reversed by TNF-alpha blockade in vitro and in vivo. These findings pointed to an epithelial defect in Stat1-/- mice. Indeed, we next demonstrated that Stat1-/- mice that were reconstituted with wild-type bone marrow were still susceptible to infection with Sendai virus, whereas wild-type mice that received Stat1-/- bone marrow retained resistance to infection. The susceptible epithelial Stat1-/- chimeric mice also exhibited increased viral replication as well as excessive neutrophils, CXCL2, and TNF-alpha in the airspace. These findings provide some of the most definitive evidence to date for the critical role of barrier epithelial cells in innate immunity to common pathogens, particularly in controlling viral replication.