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586 citation(s) found for "Da, Xiao".

Outcome of Goniotomy Over 120, 240 and 360 Degrees in Juvenile Open Angle Glaucoma: A Multicenter Study
Wang, Zhixuan , Fan, Hanying, Ge, Qingshu, Dang, Guangfu , Yang, Xiao , Xie, Lin , Zhu, Xiaoming , Yang, Yangfan , Wang, Yuhong , Liu, Jinkun , Zhang, Hongyang , Feng, Yuhan, Qi, Yongjun , Ye, Xiangxiang, Lai, Mingying , Lin, Peijie , Wang, Pusheng, Han, Shumei, Xu, Jiangang , Tao, Liming, Liu, Heting , Nie, Xin , Liao, Mengfei, Zou, Kai , Song, Yunhe , Lin, Fengbin , Xiaokaiti, Dilimulati, Liu, Xiaoyi , Fang, Zige , Jin, Ling, Chen, Yu , Han, Ying , Zeng, Liuzhi , Tham, Clement C, Yang, Zefeng , Ye, Xiangxiang, Lin, Peijie , Wang, Pusheng, Han, Shumei, Nie, Xin, Zou, Kai, Jiang, Yi , Zhou, Fengqi , Tham, Clement Chee Yung , Pan, Xiaojing , Weinreb, Robert Neal , Zhang, Xiulan

Journal of Glaucoma | March 19, 2025 | Volume: 34 | Issue: 6 | Pages: 433-439

10.1097/ijg.0000000000002569 | PMID 40105411 Get It

Précis: 240-degree and 360-degree goniotomy (GT) demonstrated similar efficacy in intraocular pressure (IOP) reduction, both outperforming 120-degree GT in patients with juvenile open angle glaucoma (JOAG) at postoperative 6-month follow-up. Objective: To compare the surgical efficacy and safety of 120-degree, 240-degree, and 360-degree GT for patients with JOAG. Patients and Methods: This multicenter retrospective study included 102 eyes of 102 patients with JOAG, who underwent GT with a follow-up of at least 6 months. Patients were categorized into 3 groups: (1) 120-degree GT, (2) 240-degree GT, and (3) 360-degree GT. IOP, glaucoma medications, and complications were recorded at baseline and the final visit. Complete success and qualified success were defined as a postoperative IOP ≤21 mm Hg without and with medications, respectively. Results: Mean age of the participants was 24.4 ± 7.9 years. After a mean follow-up of 8.1 ± 2.7 months, complete success rates were similar between the 240-degree GT (45.2%) and the 360-degree GT (63.2%; P = 0.135), and both were superior to 120-degree GT (18.2%; P < 0.05). Qualified success rates among patients in the 120-degree, 240-degree, and 360-degree GT groups were 93.9%, 96.8%, and 100%, respectively, and showed no statistically significant difference (P = 0.292). 360-degree GT required fewer medications than 240-degree GT and 120-degree GT (P < 0.05), with no significant difference in medications between 120-degree GT and 240-degree GT (P > 0.05). Hyphema was the most common postoperative complication, with a significantly higher incidence in the 360-degree GT (68.4%) compared with the 240-degree GT (41.9%) and 120-degree GT (33.3%; P < 0.05). Conclusions: 240-degree and 360-degree GT showed similar efficacy in IOP reduction and were superior to 120-degree GT. More extensive GT may provide better outcomes in JOAG.
Macrophage peroxisomes guide alveolar regeneration and limit SARS-CoV-2 tissue sequelae
Wei, Xiaoqin , Qian, Wei , Narasimhan, Harish , Chan, T. K., Liu, Xue , Arish, Mohd , Young, Scott , Li, Chaofan , Cheon, In Su , Yu, Qing , Santos, Gislane de Almeida , Yeatts, Eric V., Spear, Olivia J., Yi, Mou, Hahn, Young S. , Kaplan, Mark H. , Sperling, Anne I. , Shim, Yun M. , Vassallo, Robert , Chen, Peter , Roden, Anja C. , Que, Jianwen , Chan, Ting , Young, Samuel , de Almeida Santos, Gislane , Zhao, Xiao-Yu , Yeatts, Eric V , Parimon, Tanyalak , Fang, Yinshan , Hahn, Young S , Bullock, Timothy N J , Somerville, Lindsay A , Kaplan, Mark H , Sperling, Anne I , Shim, Yun Michael , Vassallo, Robert , Chen, Peter , Ewald, Sarah E , Roden, Anja C , Que, Jianwen , Jiang, Dianhua , Sun, Jie , Li, Chaofan , Yi, Megan, Somerville, Lindsay , Sun, Jie

Science | March 6, 2025 | Volume: 387 | Issue: 6738 | Pages: No page available

10.1126/science.adq2509 | PMID 40048515 Get It

Peroxisomes are vital but often overlooked metabolic organelles. We found that excessive interferon signaling remodeled macrophage peroxisomes. This loss of peroxisomes impaired inflammation resolution and lung repair during severe respiratory viral infections. Peroxisomes were found to modulate lipid metabolism and mitochondrial health in a macrophage type-specific manner and enhanced alveolar macrophage-mediated tissue repair and alveolar regeneration after viral infection. Peroxisomes also prevented excessive macrophage inflammasome activation and IL-1β release, limiting accumulation of KRT8 high dysplastic epithelial progenitors following viral injury. Pharmacologically enhancing peroxisome biogenesis mitigated both acute symptoms and post-acute sequelae of COVID-19 (PASC) in animal models. Thus, macrophage peroxisome dysfunction contributes to chronic lung pathology and fibrosis after severe acute respiratory syndrome coronavirus 2 infection.
Digital Therapeutic Combining Hypnosis and Diaphragmatic Breathing Intervention for Functional Abdominal Bloating: A Feasibility Study
Wang, Xiao Jing , Ebbert, Jon O. , Loftus, Conor G., Fox, Jean, Philpot, Lindsey, Ebbert, Jon, Dilmaghani, Saam , Loftus, Conor, Wang, Xiao Jing , Philpot, Lindsey M. , Palsson, Olafur S.

Clinical and Translational Gastroenterology | February 19, 2025 | Volume: 16 | Issue: 4 | Pages: e00811

10.14309/ctg.0000000000000811 | PMID 39835688 Get It

INTRODUCTION: Abdominal bloating is a difficult symptom to treat. Hypnotherapy and diaphragmatic intervention have separately shown benefit on bloating in prior work but have not been united into a single intervention. We aimed to obtain data on the potential therapeutic impact of a novel audio-recorded bloating treatment for bloating integrating hypnosis and diaphragmatic breathing, with proposed synergistic effect. METHODS: Patients with nonorganic bowel disorders with predominant bloating symptoms completed a digitally delivered 7-session audio-recorded hypnotherapy program without clinician involvement. The intervention combined bloating-targeted hypnotic suggestions and guided diaphragmatic breathing delivered under hypnosis, and was supplemented with interval self-guided breathing exercises. Participants completed online REDCap assessments at baseline, midtreatment, at end of treatment, and 3-month follow-up, evaluating symptom severity, gastrointestinal symptom-specific anxiety, overall anxiety/depression, and quality of life. Outcomes were assessed in an intention-to-treat manner with repeated measures analysis of variances (ANOVAs) with Bonferroni-adjusted pairwise post hoc tests. RESULTS: Of 23 patients who started treatment, 22 (95.6%) completed follow-up. Bloating severity on Irritable Bowel Syndrome-Symptom Severity Scale and Patient Assessment of Upper Gastrointestinal Symptom Severity Index showed reduction in bloating with large effect sizes (Cohen d of ∼0.8) at the end of treatment, as did Visceral Sensitivity Index bloating-related anxiety. At the end of treatment, 16 patients (69.6%) were Irritable Bowel Syndrome-Symptom Severity Scale treatment responders (≥30% symptom reduction) on bloating and 17 (73.9%) on overall bowel symptom severity. Anxiety, depression, and quality-of-life scores were unchanged. Outcome measures were fully maintained at the 3-month follow-up. DISCUSSION: Results suggest the therapeutic utility of a new cost-effective self-administered bloating intervention. A randomized controlled trial is planned to confirm these therapeutic effects.
Association of baseline and on-treatment ctDNA fraction with clinical outcomes in patients with mCRPC in the PSMAfore study of 177 Lu-PSMA-617.
Bono, Johann S. de , Sartor, Alton Oliver, Wei, Xiao X. , Fizazi, Karim , George, Daniel J. , Wong, Connie, Barys, Louise, Rajagopal, Nisha, Alanee, Shaheen , de Bono, Johann , Morris, Michael J. , Hermann, Ken , Piulats, Josep M. , Mahammedi, Hakim , Logothetis, Christopher J. , Wong, Connie, N., Kim

Journal of Clinical Oncology | February 18, 2025 | Volume: 43 | Issue: 5_suppl | Pages: 16-16

10.1200/jco.2025.43.5_suppl.16 Get It

16 Background: In PSMAfore (NCT04689828), [ 177 Lu]Lu-PSMA-617 ( 177 Lu-PSMA-617) prolonged rPFS versus androgen receptor pathway inhibitor (ARPI) change in taxane-naive adults with PSMA-positive metastatic castration-resistant prostate cancer (mCRPC) progressing once on an ARPI. Baseline circulating tumor DNA (ctDNA) fraction was associated with rPFS at the second interim analysis (IA) of OS (ASCO 24). Here, we assessed the association of baseline and cycle 2 day 1 (C2D1) ctDNA fraction, and early ctDNA and prostate-specific antigen (PSA) dynamics, with rPFS and OS at the third IA of OS. Methods: Patients were randomized 1:1 to 177 Lu-PSMA-617 (7.4 GBq Q6W; x6) or ARPI change. Endpoints included rPFS (primary) and OS (key secondary). Plasma ctDNA fraction was analyzed at baseline and at C2D1 using an in-house custom panel. Cox regression (adjusted for 3 risk classes based on clustering of 17 baseline clinical features) and random forest (adjusted for 15 baseline clinical features) modeling were used to assess the association of ctDNA fraction and PSA with clinical outcomes at the Feb-27-2024 data cutoff. Results: Patients with plasma samples at baseline and C2D1 were included ( 177 Lu-PSMA-617, n/N = 82/234; ARPI change, n/N = 91/234). Cox regression models adjusted for clinical features in the 177 Lu-PSMA-617 arm showed that higher ctDNA fraction was associated with shorter rPFS and OS (Table). These associations were stronger for C2D1 than baseline, both when comparing individual models and within a model including both timepoints (Table). In random forest models including clinical features and C2D1 ctDNA fraction, the total area under curves were not improved by addition of baseline ctDNA fraction (rPFS, 0.87; OS, 0.86). In the overall population, fractional decreases from baseline to C2D1 in ctDNA ( p = 0.0015) and PSA ( p < 0.0001) were strongly associated with longer rPFS, and were weakly correlated with one another (correlation coefficient, 0.26). In the 177 Lu-PSMA-617 arm, fractional decrease in ctDNA ( p = 0.002) was more strongly correlated with OS than was decrease in PSA ( p = 0.12). Conclusions: This exploratory analysis suggested that C2D1 ctDNA fraction was more strongly associated than baseline ctDNA fraction with rPFS and OS. Early ctDNA fraction dynamics contributed additional information in the prediction of rPFS and OS beyond PSA dynamics alone. Clinical trial information: NCT04689828 . Cox regression models. a rPFS OS Baseline model, HR (95% CI); p 6.0 (1.6–23.0); 0.0095 12.0 (3.0–48.7); 0.00052 C-index ± SE 0.69 ± 0.04 0.75 ± 0.04 C2D1 model, HR (95% CI); p 47.7 (10.1–226.0); < 0.0001 82.7 (16.4–417.0); < 0.0001 C-index ± SE 0.72 ± 0.03 0.77 ± 0.03 Baseline + C2D1 model Baseline, HR (95% CI); p 3.1 (0.7–14.0); 0.14 2.1 (0.4–12.7); 0.41 C2D1, HR (95% CI); p 35.9 (7.2–180.0); < 0.0001 52.5 (7.6–362.0); < 0.0001 C-index ± SE 0.72 ± 0.03 0.79 ± 0.03 a HRs correspond to 1 unit change in ctDNA fraction.
Real-world outcomes among patients with metastatic castration-resistant prostate cancer (mCRPC) receiving guideline-recommended therapies after treatment with 177 Lu-PSMA-617: A real-world prostate cancer disease observat
Wei, Xiao X. , Shore, Neal D., George, Daniel J. , Heath, Elisabeth I. , Nguyen, Jennifer, Patel, Jeetvan , Sawhney, Amrita , Kang, Barinder , Byrne, Clare, Sartor, Alton Oliver, Shore, Neal D. , Tang, Jackson

Journal of Clinical Oncology | February 18, 2025 | Volume: 43 | Issue: 5_suppl | Pages: 61-61

10.1200/jco.2025.43.5_suppl.61 Get It

61 Background: 177 Lu-PSMA-617 was approved in March 2022 for patients with mCRPC pretreated with an androgen receptor pathway inhibitor (ARPI) and a taxane. There are limited data on the effectiveness of treatments post- 177 Lu-PSMA-617. The aim of this study was to describe prostate-specific antigen (PSA) responses among patients with mCRPC receiving a guideline-recommended therapy as the next therapy after 177 Lu-PSMA-617 treatment. Methods: This retrospective, observational study used real-world data from the PRECISION data platform, a proprietary dataset developed by Novartis, comprised of patient-level electronic health record and claims data that represent the US advanced prostate cancer population in the community, academic, urology, and medical oncology settings. Patients with mCRPC who received any guideline-recommended therapy at least 14 days after treatment with 177 Lu-PSMA-617 between March 23, 2022 and July 31, 2024 were included. Guideline-recommended therapies included abiraterone, enzalutamide, darolutamide, apalutamide, cabazitaxel, docetaxel, pembrolizumab, sipuleucel-T, niraparib, olaparib, talazoparib, rucaparib, and radium-223. Patients’ PSA values while on 177 Lu-PSMA-617 treatment were compared with their PSA values during the subsequent therapy course. Proportions of patients achieving reductions in PSA levels ≥50% (PSA50) and ≥80% (PSA80) were estimated. All analyses were descriptive. Results: A total of 152 patients receiving any subsequent guideline-recommended therapy after 177 Lu-PSMA-617 were identified. Mean age was 72.1 years. Most patients received an ARPI (n=93, 61.2%) – abiraterone (n=38), enzalutamide (n=37), darolutamide (n=10), or apalutamide (n=8) – as their subsequent therapy. Of patients who received a taxane (n=42, 27.6%), 24 received cabazitaxel and 18 received docetaxel. Median time to initiation of subsequent therapy was 206 days (interquartile range [IQR] 101–301 days) from 177 Lu-PSMA-617 initiation and 44 days (IQR 17–119 days) from 177 Lu-PSMA-617 discontinuation. Overall, among patients with sufficient information for PSA evaluation (n=30), 46.7% achieved PSA50 and 40.0% PSA80 post- 177 Lu-PSMA-617. Among patients receiving an ARPI, PSA50 was observed in 11/18 (61.1%) and PSA80 in 10/18 (55.6%). Among patients receiving a taxane, PSA50 and PSA80 were seen in 3/12 (25.0%) and 2/12 (16.7%), respectively. Conclusions: In this real-world analysis, the majority of patients who received guideline-recommended therapies after 177 Lu-PSMA-617 achieved at least a PSA50 response, suggesting that 177 Lu-PSMA-617 treatment does not preclude response to other subsequent therapies.
Real-world treatment patterns and outcomes in advanced prostate cancer: A cohort study using the prostate cancer disease observation (PRECISION) data platform.
Heath, Elisabeth I. , Sartor, Alton Oliver, George, Daniel J. , Nguyen, Jennifer, Patel, Jeetvan , Bollu, Vamsi , Sawhney, Amrita , Kang, Barinder , Fallick, Mark, Runeckles, Kyle , Wei, Xiao X. , Shore, Neal D. , George, Daniel J. , Tang, Jackson

Journal of Clinical Oncology | February 18, 2025 | Volume: 43 | Issue: 5_suppl | Pages: 59-59

10.1200/jco.2025.43.5_suppl.59 Get It

59 Background: There are several real-world data sources for prostate cancer (PC), each with its own limitations; the most notable limitation is an incomplete picture of the multidisciplinary clinical management of PC. The PRECISION data platform, the largest, most comprehensive, and continually updated real-world evidence source on patients with advanced PC to date, tries to address this limitation and shed light on PC management in both urology and oncology practices in both academic and community settings in the US. The platform includes a wide variety of PC-specific data variables among patients with metastatic hormone-sensitive PC (mHSPC) and metastatic castration-resistant PC (mCRPC) treated across the US. This study aims to provide an overview of the characteristics, treatment patterns, and clinical outcomes among patients with mHSPC and mCRPC included in PRECISION to date. Methods: A retrospective cohort study that included patients with a diagnosis of mHSPC or mCRPC (index date) in PRECISION between 2018 and 2024 (cohorts could overlap). For each cohort, patient characteristics and treatment patterns were evaluated descriptively. Results: The PRECISION platform currently includes 72,855 and 33,538 patients with mHSPC and mCRPC, respectively. Among the mHSPC cohort, the mean ± standard deviation (SD) age was 74.5±9.4 years; 67% and 33% were treated at oncology and urology centers, respectively; 40% and 60% were from academic and community settings, respectively. The average ± SD time from mHSPC to mCRPC was 11.2±11.7 months. Overall, 77.6% of patients were treated with androgen-deprivation therapy (ADT), of whom 64.7% had ADT combined with androgen receptor pathway inhibitors (ARPIs) including abiraterone acetate, enzalutamide, and apalutamide. Among the mCRPC cohort, the mean ± SD age was 74.1±9.3 years; similar treatment setting patterns as mHSPC were observed. Overall, 74.6% initiated a first-line (1L) therapy on/after mCRPC diagnosis; 52.1% had 1L ARPIs, 16.2% 1L immunotherapy, and 4.6% 1L taxane chemotherapy. In addition, 2.2% of patients received the recently US FDA-approved therapy, lutetium-177 vipivotide tetraxetan, at some point during their mCRPC disease duration. Conclusions: This analysis provides key insights into the patients included in the PRECISION data platform. This multidisciplinary dataset provides a 70/30 split between oncology and urology centers, and a 40/60 split between academic and community settings. The observed clinical profile, treatment patterns, and outcomes comprise the most comprehensive representation of current treatment practice in the US. Future analyses of clinical outcomes with existing and novel therapies could contribute significantly to our understanding of opportunities to improve the treatment of patients with mHSPC and mCRPC in the US.
Clinical outcomes of prompt versus deferred 177 Lu-PSMA-617 initiation for metastatic castration-resistant prostate cancer (mCRPC) based on prior androgen receptor pathway inhibitor (ARPI) and taxane chemotherapy exposure
Sartor, Alton Oliver, Wei, Xiao X. , Shore, Neal D., Heath, Elisabeth I. , Nguyen, Jennifer, Patel, Jeetvan , Sawhney, Amrita , Kang, Barinder , Byrne, Clare, George, Daniel J. , Shore, Neal D. , Tang, Jackson , George, Daniel J.

Journal of Clinical Oncology | February 18, 2025 | Volume: 43 | Issue: 5_suppl | Pages: 56-56

10.1200/jco.2025.43.5_suppl.56 Get It

56 Background: The broad therapeutic arsenal for mCRPC, with overlapping indications, makes selecting the optimal treatment sequence challenging in clinical practice. The aim of this study was to evaluate the prostate-specific antigen (PSA) responses and overall survival (OS) among patients with mCRPC receiving 177 Lu-PSMA-617 based on prior ARPI and taxane treatment exposure. Methods: This retrospective, observational study used real-world data from the PRECISION data platform, a harmonized dataset of advanced prostate cancer patients in the US from diverse clinical settings. Patients with mCRPC who had received ≥1 dose of 177 Lu-PSMA-617 between March 23, 2022 and July 31, 2024, after prior treatment with ≥1 ARPI and ≥1 taxane, were included. To assess PSA response, the baseline PSA value obtained within 90 days before starting 177 Lu-PSMA-617 was compared with the on-treatment PSA value obtained ≥28 days after 177 Lu-PSMA-617 initiation. The number of patients achieving PSA reductions ≥50% (PSA50) and ≥80% (PSA80) were estimated, with patients classified into two cohorts based on prior ARPI and taxane exposure: (1) prompt cohort: after only 1 ARPI and 1 taxane, and (2) deferred cohort: >1 ARPI and/or >1 taxane. Patient characteristics and treatment patterns were evaluated descriptively. OS from 177 Lu-PSMA-617 initiation was estimated using Kaplan–Meier methodology. Results: A total of 431 patients were included: 177 patients in the prompt cohort and 254 patients in the deferred cohort. Of patients in the deferred cohort, 185 (72.8%) received ≥1 ARPI and 1 taxane, 32 (12.6%) received 1 ARPI and ≥1 taxane, and 37 (14.6%) received ≥1 ARPI and ≥1 taxane. Median (interquartile range age was 73 (67–78) years and most demographic characteristics were balanced between groups. Patients in the deferred cohort had higher median PSA levels at baseline (63.1 ng/mL vs 25.2 ng/mL). PSA50 was observed in 18/33 (55%) patients in the prompt cohort vs 28/66 (42%) in the deferred cohort. PSA80 was observed in 13/33 (39%) patients in the prompt cohort vs 21/66 (31%) in the deferred cohort. Across both cohorts, median OS was 18.0 months (95% confidence interval [CI]: 15.1 months–not reached [NR]). Median OS was NR in patients in the prompt cohort vs 15.1 months in patients in the deferred cohort (95% CI: 11.6 months–NR). Conclusions: In this large real-world study, prompt initiation of 177 Lu-PSMA-617 (after only 1 ARPI and 1 taxane) showed superior clinical outcomes versus deferred initiation of 177 Lu-PSMA-617. Patients were more likely to achieve a PSA reduction ≥50% and ≥80% and had longer OS with prompt initiation of 177 Lu-PSMA-617. These results may help to guide treatment sequencing in clinical practice.
Challenges and Opportunities in Cytopathology Artificial Intelligence
VandeHaar, Meredith A. , Alasi, Hussien , Doganay, Fatih, Alazab, Heba, Xiao, Yao , Balan, Jagadheshwar , Dangott, Bryan, Nassar, Aziza , Akkus, Zeynettin , Al-Asi, Hussien , Yilmaz, Ibrahim, Balan, Jagadheshwar , Dangott, Bryan J, Nassar, Aziza , Akkus, Zeynettin , Yilmaz, Ibrahim, Reynolds, Jordan

Bioengineering | February 13, 2025 | Volume: 12 | Issue: 2 | Pages: 176

10.3390/bioengineering12020176 | PMID 40001695 Get It

Artificial Intelligence (AI) has the potential to revolutionize cytopathology by enhancing diagnostic accuracy, efficiency, and accessibility. However, the implementation of AI in this field presents significant challenges and opportunities. This review paper explores the current landscape of AI applications in cytopathology, highlighting the critical challenges, including data quality and availability, algorithm development, integration and standardization, and clinical validation. We discuss challenges such as the limitation of only one optical section and z-stack scanning, the complexities associated with acquiring high-quality labeled data, the intricacies of developing robust and generalizable AI models, and the difficulties in integrating AI tools into existing laboratory workflows. The review also identifies substantial opportunities that AI brings to cytopathology. These include the potential for improved diagnostic accuracy through enhanced detection capabilities and consistent, reproducible results, which can reduce observer variability. AI-driven automation of routine tasks can significantly increase efficiency, allowing cytopathologists to focus on more complex analyses. Furthermore, AI can serve as a valuable educational tool, augmenting the training of cytopathologists and facilitating global health initiatives by making high-quality diagnostics accessible in resource-limited settings. The review underscores the importance of addressing these challenges to harness the full potential of AI in cytopathology, ultimately improving patient care and outcomes.
A plain language summary of NALIRIFOX compared with nab-paclitaxel and gemcitabine for patients with metastatic pancreatic cancer (NAPOLI 3)
Pazo-Cid, Roberto , Chandana, Sreenivasa R , Dean, Andrew, Leei, Woo Jin, Goetze, Thorsten Oliver , Paulson, Andrew Scott , Bekaii‐Saab, Tanios , Pant, Shubham , Hubner, Richard , Xiao, Zhimin , Chen, Huanyu , Benzaghou, Fawzi, Bekaii-Saab, Tanios S , Wainberg, Zev A. , Melisi, Davide , Macarulla, Teresa , Fouchardière, Christelle de la , Kišš, Igor , Cutsem, Eric Van , Pant, Shubham , O’Reilly, Eileen M.

Future Oncology | February 12, 2025 | Volume: 21 | Issue: 7 | Pages: 765-774

10.1080/14796694.2025.2458458 | PMID 39935331 Get It

NPA7: A Dual Receptor Activating Peptide That Inhibits Cardiac Oxidative Stress
Ma, Xiaoyu , Malsawmzuali, JC, Moroni, Dante , Ma, Xiao, Zheng, Ye , Pan, Shuchong, Wang, Ying , Sangaralingham, S. Jeson , Burnett, J. C., Malsawmzuali, JC , Malsawmzuali, Joute Chawngvawr, Moroni, Dante G , Wang, Ying , Malsawmzuali, J C , Sangaralingham, S. Jeson

Hypertension | January 8, 2025 | Volume: 82 | Issue: 3 | Pages: 463-475

10.1161/hypertensionaha.124.23579 | PMID 39772591 Get It

BACKGROUND: Cardiomyocyte oxidative stress significantly contributes to the progression of hypertension-induced heart failure, highlighting the need for targeted therapies. We developed a novel peptide, NPA7, that coactivates the GC-A (guanylyl cyclase A)/cGMP and MasR (Mas receptor)/cAMP pathway. This study aimed to test NPA7’s ability to inhibit oxidative stress by modulating the p62 (Sequestosome 1)-KEAP1 (Kelch-like ECH-associated protein 1)-NRF2 (nuclear factor erythroid 2-related factor 2) pathway in human cardiomyocytes (HCMs) and a rat model of hypertension. METHODS: Oxidative stress was induced in HCMs using H 2 O 2 with phosphate-buffered saline or NPA7 treatment. Intracellular reactive oxygen species levels were assessed via dihydroethidium staining. Western blotting analysis measured p62, KEAP1, and NRF2 protein levels, while GSH/GSSG (glutathione/glutathione disulfide) ratios and antioxidant gene expression were analyzed. HCMs were transfected with small interfering RNA targeting GC-A, MasR, or p62 before NPA7 and H 2 O 2 treatment. In vivo, spontaneously hypertensive rats received saline or NPA7, with normotensive Wistar Kyoto rats as control and cardiac oxidative stress, KEAP1 protein levels, NOX2 (NADPH oxidase 2), and p67 (NADPH oxidase subunit p67-phox) mRNA levels were measured. RESULTS: NPA7 reduced H 2 O 2 -induced reactive oxygen species levels and increased GSH/GSSG ratio in HCMs. Silencing GC-A (guanylyl cyclase A receptor) and MasR (Mas receptor) reversed NPA7’s effects. NPA7 activated the KEAP1-NRF2 pathway, enhancing NRF2’s antioxidant target gene expression. In p62 knockdown HCMs, NPA7-induced KEAP1 degradation and NRF2 activation were diminished. Reactive oxygen species levels were elevated in spontaneously hypertensive rat versusWistar Kyoto rats’ hearts, however, NPA7 treatment reduced myocardial reactive oxygen species, suppressed KEAP1 protein, and decreased NOX2 and p67 mRNA levels. CONCLUSIONS: NPA7 exhibits antioxidant properties in HCMs and spontaneously hypertensive rat hearts by targeting GC-A and MasR through the p62-KEAP1-NRF2 pathway, supporting a novel therapeutic approach against cardiovascular disease–related oxidative stress.