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Moreover, the pretreatment with a tropomyosin-receptor-kinase B (TrkB) antagonist ANA-12 (0.5 mg/kg) significantly blocked the beneficial effects of (R)-ketamine in DSS-induced UC model. The study shows that (R)-ketamine can produce beneficial effects in DSS-induced colitis model through TrkB stimulation. Therefore, (R)-ketamine may be a novel therapeutic drug for inflammatory bowel diseases such as UC.In this review, current data was used to elucidate the mechanisms by which metformin hydrochloride exerts chemopreventive effects on colorectal cancer (CRC). The first-line agent for the treatment of type 2 diabetes mellitus (T2DM), metformin, has recently been cited in a number of studies, in-vitro and in-vivo, for its potential anticancer capabilities in a variety of malignancies. While generally known to target AMP-activated protein kinase (AMPK), as an antidiabetic agent, the mechanisms by which metformin confers anticancer properties, particularly in CRC, are far less understood. This review aims to comprehensively integrate novel pharmacologic findings, especially more recent insights, to explain metformin's anti-CRC mechanisms. Among these include metformin-mediated alterations to a number of key signaling pathways involving CRC cell growth and stemness, anti-EMT (epithelial-mesenchymal transition) regulatory actions, as well as altered pro-cancer cellular energetic states and survival. Cytoskeletal Signaling inhibitor These findings may prove particularly meaningful in the fields of experimental and clinical oncotherapy.Breast cancer and cardiovascular-specific mortality are higher among blacks compared with whites, but disparities in cancer therapy-related adverse cardiovascular outcomes have not been well studied. We assessed for the contribution of race and socioeconomic status on cardiotoxicity among women with HER2-positive breast cancer. This retrospective cohort analysis studied women diagnosed with stage I-III HER2-positive breast cancer from 2004-2013. All underwent left ventricular ejection fraction assessment at baseline and at least one follow-up after beginning trastuzumab. Multivariable logistic regression was used to assess the association between race and socioeconomic status (SES) on cardiotoxicity, defined by clinical heart failure (New York Heart Association class III or IV) or asymptomatic left ventricular ejection fraction decline (absolute decrease ≥ 10% to less then 53%, or ≥ 16%). Blacks had the highest prevalence of hypertension, diabetes, and increased BMI. Neighborhood-level SES measures including household income and educational attainment were lower for blacks compared with whites and others. The unadjusted cardiotoxicity risk was significantly higher in black compared with white women (OR, 2.10; 95% CI, 1.42 to 3.10). In a multivariable analysis, this disparity persisted after controlling for relevant cardiovascular risk factors (adjusted OR, 1.88; 95% CI, 1.25 to 2.84). Additional models adjusting for SES factors of income, educational attainment, and insurance status did not significantly alter the association between race and cardiotoxicity. In conclusion, black women are at increased risk of cardiotoxicity during HER2-targeted breast cancer therapy. Future etiologic analyses, particularly studies exploring biologic or genetic mechanisms, are needed to further elucidate and reduce racial disparities in cardiotoxicity.Effect of angiotensin-converting enzyme inhibitors (ACEI) and angiotensin II receptor blockers (ARB) among hypertensive patients with coronavirus disease 2019 (COVID-19) is debated. The aim of the COVIDECA study was to assess the outcome of ACEI and ARB among hypertensive patients presenting with COVID-19. We reviewed from the Assistance Publique-Hôpitaux de Paris healthcare record database all patients presenting with confirmed COVID-19 by RT-PCR. We compared hypertensive patients with ACEI or ARB and hypertensive patients without ACEI and ARB. Among 13,521 patients presenting with confirmed COVID-19 by RT-PCR, 2,981 hypertensive patients (mean age 78.4 ± 13.6 years, 1,464 men) were included. Outcome of hypertensive patients was similar whatever the use or non-use of ACEI or ARB admission in ICU (13.4% in patients with ACEI or ARB versus 14.8% in patients without ACEI/ARB, p = 0.35), need of mechanical ventilation (5.5% in patients with ACEI or ARB vs 6.3% in patients without ACEI/ARB, p = 0.45), in-hospital mortality (27.5% in patients with ACEI or ARB vs 26.7% in patients without ACEI/ARB, p = 0.70). In conclusion, the use of ACEI and ARB remains safe and can be maintained in hypertensive patients presenting with COVID-19.Cardiac Troponin (hs-TnT) elevation has been reported in unselected patients hospitalized with COVID-19 however the mechanism and relationship with mortality remain unclear. Consecutive patients admitted to a high-volume intensive care unit (ICU) in London with severe COVID-19 pneumonitis were included if hs-TnT concentration at admission was known. Kaplan-Meier survival analysis performed, with cohorts classified a priori by multiples of the upper limit of normal (ULN). 277 patients were admitted during a 7-week period in 2020; 176 were included (90% received invasive ventilation). hs-TnT at admission was 16.5 (9.0 to 49.3) ng/L, 56% had concentrations >ULN. 56 patients (31.8%) died during the index admission. Admission hs-TnT level was lower in survivors (12.0 (8.0-27.8) vs 28.5 (14.0 to 81.0) ng/L, p = 0.001). Univariate predictors of mortality were age, APACHE-II Score and admission hs-TnT (HR 1.73, p = 0.007). By multivariate regression, only age (HR 1.33, CI 1.16.to 1.51, p ULN (log-rank p-value less then 0.001). Peak hs-TnT was higher in those who died but was not predictive of death after adjustment for other factors. In conclusion, in critically ill patients with COVID-19 pneumonitis, the hs-TnT level at admission is a powerful independent predictor of the likelihood of surviving to discharge from ICU. In most cases, hs-TnT elevation does not represent major myocardial injury but acts as a sensitive integrated biomarker of global stress. Whether stratification based on admission Troponin level could be used to guide prognostication and management warrants further evaluation.
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