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1.
J Res Adolesc ; 2024 Sep 08.
Artículo en Inglés | MEDLINE | ID: mdl-39245848

RESUMEN

Research shows the impact of cultural stressors (e.g. perceived discrimination, bicultural stressors, negative context of reception) on adolescents' psychosocial outcomes. Given the presence of multiple cultural stressors in many Hispanic adolescents' lives, it is essential to examine the (a) developmental sequencing of cultural stressors among recent immigrant youth and (b) predictive effects of cultural stressors on adolescents' psychosocial outcomes. We employed a random intercept cross-lagged panel model to examine the longitudinal interplay among cultural stressors and their effects on youth outcomes using longitudinal data with six waves among 302 recently immigrated Hispanic adolescents (47% girls, Mage = 14.51, SD = .88). We observed bidirectional within-person relations and between-person associations among cultural stressors. At the within-person level, bidirectional cross-lagged effects emerged between perceived discrimination and bicultural stress, between perceived discrimination and negative context of reception, and between negative context of reception and bicultural stress. At the between-person level, bidirectional cross-lagged effects emerged only between perceived discrimination and bicultural stressors. Our findings indicate that cultural stressors explain heterogeneity in psychosocial outcomes: self-esteem was inversely predicted by all cultural stressors, whereas depressive symptoms were predicted only by perceived discrimination. In addition, optimism was predicted only by bicultural stressors, and externalizing behavior was predicted by both bicultural stressors and perceived discrimination. These results suggest that the longitudinal relationships among cultural stressors are (partly) bidirectional. Additionally, cultural stressors demonstrated differential predictive effects on psychosocial outcomes, indicating the added value of considering multiple cultural stressors and their longitudinal effects on adolescents' psychosocial outcomes.

3.
Psychol Trauma ; 2024 Aug 29.
Artículo en Inglés | MEDLINE | ID: mdl-39207429

RESUMEN

OBJECTIVE: The present research examines the disparities among Ukrainians residing in the United States, comparing Ukrainians who migrated before the February 2022 Russian invasion against those who arrived afterward. We compare these two cohorts vis-a-vis anxiety, depressive symptoms, optimism, posttraumatic stress, life satisfaction, family economic stress, cultural stress (discrimination, negative context of reception, and language stress), hazardous alcohol use, and domestic violence perpetration and victimization. METHOD: The present sample included 703 Ukrainians (53.63% women) residing in the United States. We conducted a series of multivariate analyses of variance using arrival cohort (pre- vs. postinvasion) and gender (male vs. female) as independent variables. RESULTS: Results indicated that postinvasion participants reported greater internalizing symptoms, cultural/economic stress, and hazardous alcohol use, whereas preinvasion arrivals reported greater levels of optimism and life satisfaction. No significant interactions between cohort and gender emerged for any of the outcomes. CONCLUSION: Our findings offer valuable insights into the mental health and well-being of displaced Ukrainians within the backdrop of ongoing conflicts. These findings have significant implications for support and intervention efforts not only for Ukrainians but also for other crisis migrant groups. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

4.
Artículo en Inglés | MEDLINE | ID: mdl-38976409

RESUMEN

OBJECTIVES: Crucial to the resettlement experiences of immigrants is the degree to which the receiving country accepts them and affords them social support and opportunities. Through the factor structure and incremental validity of scores generated by the Negative Context of Reception (NCR) Scale, in the present study, we examine Indian American youths' perception of their context of reception using a sample of youth residing in the United States. METHOD: Data came from a sample of 223 Indian American youth (aged 12-17) as part of a larger convergent mixed-methods project. Using confirmatory factor analysis, we examined the scale's validity and the relationship between perceived NCR and criterion-related factors such as perceived discrimination and depressive and anxiety symptoms. Interpretive Phenomenological Analysis was then used to analyze qualitative data from 11 of these Indian American youth. Qualitative data provided additional insights about NCR in this population. RESULTS: NCR scores evidenced strong psychometric properties among Indian American youth. Confirmatory factor models demonstrated good model fit. NCR yielded significant associations with perceived discrimination (r = .33, p < .001) and depressive symptoms (r = .25, p < .002). Two major themes (parental/family sacrifices and being treated differently from White peers) emerged from the qualitative data. CONCLUSIONS: Results validate NCR as a construct relevant to Indian American youth and associated with negative mental health symptoms such as anxiety and depression. Furthermore, these results underscore the importance of a welcoming and supportive environment for Indian American youths' well-being. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

5.
Artículo en Inglés | MEDLINE | ID: mdl-39073766

RESUMEN

OBJECTIVES: We aimed to compare the stability of the newly developed ß-lactams (cefiderocol) and ß-lactam/ß-lactamase inhibitor combinations (ceftazidime/avibactam, ceftolozane/tazobactam, aztreonam/avibactam, cefepime/taniborbactam, cefepime/zidebactam, imipenem/relebactam, meropenem/vaborbactam, meropenem/nacubactam and meropenem/xeruborbactam) against the most clinically relevant mechanisms of mutational and transferable ß-lactam resistance in Pseudomonas aeruginosa. METHODS: We screened a collection of 61 P. aeruginosa PAO1 derivatives. Eighteen isolates displayed the most relevant mechanisms of mutational resistance to ß-lactams. The other 43 constructs expressed transferable ß-lactamases from genes cloned in pUCP-24. MICs were determined by reference broth microdilution. RESULTS: Cefiderocol and imipenem/relebactam exhibited excellent in vitro activity against all of the mutational resistance mechanisms studied. Aztreonam/avibactam, cefepime/taniborbactam, cefepime/zidebactam, meropenem/vaborbactam, meropenem/nacubactam and meropenem/xeruborbactam proved to be more vulnerable to mutational events, especially to overexpression of efflux operons. The agents exhibiting the widest spectrum of activity against transferable ß-lactamases were aztreonam/avibactam and cefepime/zidebactam, followed by cefepime/taniborbactam, cefiderocol, meropenem/xeruborbactam and meropenem/nacubactam. However, some MBLs, particularly NDM enzymes, may affect their activity. Combined production of certain enzymes (e.g. NDM-1) with increased MexAB-OprM-mediated efflux and OprD deficiency results in resistance to almost all agents tested, including last options such as aztreonam/avibactam and cefiderocol. CONCLUSIONS: Cefiderocol and new ß-lactam/ß-lactamase inhibitor combinations show promising and complementary in vitro activity against mutational and transferable P. aeruginosa ß-lactam resistance. However, the combined effects of efflux pumps, OprD deficiency and efficient ß-lactamases could still result in the loss of all therapeutic options. Resistance surveillance, judicious use of new agents and continued drug development efforts are encouraged.

6.
Front Psychiatry ; 15: 1358648, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38911705

RESUMEN

Internalizing symptoms associated with anxiety and depression have been correlated with harmful alcohol use among Latino/as, but little attention has been paid to assessing the association between perceived discrimination and harmful alcohol use. The present study was designed to investigate the association between perceived discrimination, internalizing symptoms associated with anxiety and depression, and harmful alcohol use among Latino/a immigrants living in the United States (US). Our sample included 426 Latino/a immigrants. Their mean age was 40.05 years (SD = 6.50), 65.50% were women, 80.00% had a partner, 54.20% lived on less than $2,000 a month, and 41.50% reported having attained a college degree. Perceived discrimination was assessed using the Perceived Discrimination Scale, anxious symptoms were assessed using the GAD-7, depressive symptoms were assessed using the CES-D short form, and harmful alcohol use was assessed using AUDIT. We estimated a linear regression model using cross-sectional, self-reported data. The model was statistically significant, R 2 = 0.38, F (8, 425) = 32.09, p < 0.01. Discrimination was significantly associated with AUDIT scores, (ß = 0.21, p < 0.01) after accounting for covariates and for symptoms of anxiety and depression. Our results indicate that experiences of discrimination in the US are associated with increased harmful alcohol use even after controlling for other variables. These findings may be useful in designing coping interventions specifically for Latino/a immigrants to reduce the risk of alcohol use disorder. This study also has political and public health implications for acknowledging the detrimental health consequences of experiencing discrimination, providing support to the position that reducing racism and discrimination represent important public health priorities.

7.
Artículo en Inglés | MEDLINE | ID: mdl-38880712

RESUMEN

OBJECTIVE: 1) To evaluate the ability of baseline and on 24 h serum calprotectin, in comparison to canonical biomarkers (lactate and procalcitonin), for prognosis of 28-day mortality in critically ill septic patients; and 2) To develop a predictive model combining the three biomarkers. DESIGN: A single-center, retrospective study. SETTING: Intensive Care Unit of a university hospital. PATIENTS OR PARTICIPANTS: One hundred and seventy three septic pacientes were included. INTERVENTIONS: Measurement of baseline lactate, procalcitonin and calprotectin level and procalcitonin and calprotectin levels on 24 h. MAIN VARIABLES OF INTEREST: Demographics and comorbidities, SOFA score on ICU admission, baseline lactate, procalcitonin and calprotectin on admission and on 24 h and 28-day mortality. RESULTS: 1) On ICU admission, lactate was the only biomarker achieving a significant accuracy (AUC: 0.698); 2) On 24 h, no differences were found on procalcitonin and calprotectin levels. Procalcitonin and calprotectin clearances were significantly lower in non-survivors and both achieved a moderate performance (AUCs: 0.668 and 0.664, respectively); 3) A biomarker based-model achieved a significant accuracy (AUC: 0.766), trending to increase (AUC: 0.829) to SOFA score alone; y 4) Baseline lactate levels and procalcitonin and calprotectin clearance were independent predictors for the outcome. CONCLUSIONS: 1) Baseline and on 24 h calprotectina and procalcitonin levels lacked ability in predicting 28-day mortality; 2) Accuracy of clearance of both biomarkers was moderate; and 3) Combination of SOFA score and the predictive biomarker based-model showed a high prognostic accuracy.

8.
J Med Virol ; 96(7): e29773, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38940448

RESUMEN

The dynamics of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission are influenced by a variety of factors, including social restrictions and the emergence of distinct variants. In this study, we delve into the origins and dissemination of the Alpha, Delta, and Omicron-BA.1 variants of concern in Galicia, northwest Spain. For this, we leveraged genomic data collected by the EPICOVIGAL Consortium and from the GISAID database, along with mobility information from other Spanish regions and foreign countries. Our analysis indicates that initial introductions during the Alpha phase were predominantly from other Spanish regions and France. However, as the pandemic progressed, introductions from Portugal and the United States became increasingly significant. The number of detected introductions varied from 96 and 101 for Alpha and Delta to 39 for Omicron-BA.1. Most of these introductions left a low number of descendants (<10), suggesting a limited impact on the evolution of the pandemic in Galicia. Notably, Galicia's major coastal cities emerged as critical hubs for viral transmission, highlighting their role in sustaining and spreading the virus. This research emphasizes the critical role of regional connectivity in the spread of SARS-CoV-2 and offers essential insights for enhancing public health strategies and surveillance measures.


Asunto(s)
COVID-19 , SARS-CoV-2 , España/epidemiología , COVID-19/epidemiología , COVID-19/transmisión , COVID-19/virología , Humanos , SARS-CoV-2/genética , Genoma Viral , Filogenia , Pandemias
9.
Biomed Pharmacother ; 175: 116785, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38781869

RESUMEN

Rearrangement of the actin cytoskeleton is a prerequisite for carcinoma cells to develop cellular protrusions, which are required for migration, invasion, and metastasis. Fascin is a key protein involved in actin bundling and is expressed in aggressive and invasive carcinomas. Additionally, fascin appears to be involved in tubulin-binding and microtubule rearrangement. Pharmacophoric-based in silico screening was performed to identify compounds with better fascin inhibitory properties than migrastatin, a gold-standard fascin inhibitor. We hypothesized that monastrol displays anti-migratory and anti-invasive properties via fascin blocking in colorectal cancer cell lines. Biophysical (thermofluor and ligand titration followed by fluorescence spectroscopy), biochemical (NMR), and cellular assays (MTT, invasion of human tissue), as well as animal model studies (zebrafish invasion) were performed to characterize the inhibitory effect of monastrol on fascin activity. In silico analysis revealed that monastrol is a potential fascin-binding compound. Biophysical and biochemical assays demonstrated that monastrol binds to fascin and interferes with its actin-bundling activity. Cell culture studies, including a 3D human myoma disc model, showed that monastrol inhibited fascin-driven cytoplasmic protrusions as well as invasion. In silico, confocal microscopy, and immunoprecipitation assays demonstrated that monastrol disrupted fascin-tubulin interactions. These anti-invasive effects were confirmed in vivo. In silico confocal microscopy and immunoprecipitation assays were carried out to test whether monastrol disrupted the fascin-tubulin interaction. This study reports, for the first time, the in vitro and in vivo anti-invasive properties of monastrol in colorectal tumor cells. The number and types of interactions suggest potential binding of monastrol across actin and tubulin sites on fascin, which could be valuable for the development of antitumor therapies.


Asunto(s)
Proteínas Portadoras , Neoplasias Colorrectales , Cinesinas , Proteínas de Microfilamentos , Invasividad Neoplásica , Humanos , Neoplasias Colorrectales/patología , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/metabolismo , Proteínas de Microfilamentos/metabolismo , Proteínas Portadoras/metabolismo , Cinesinas/metabolismo , Cinesinas/antagonistas & inhibidores , Animales , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Metástasis de la Neoplasia/prevención & control , Pirimidinas/farmacología , Transducción de Señal/efectos de los fármacos , Tionas/farmacología , Antineoplásicos/farmacología
10.
Dev Cell ; 59(15): 1972-1987.e8, 2024 Aug 05.
Artículo en Inglés | MEDLINE | ID: mdl-38815584

RESUMEN

The early mechanisms of spontaneous tumor initiation that precede malignancy are largely unknown. We show that reduced aPKC levels correlate with stem cell loss and the induction of revival and metaplastic programs in serrated- and conventional-initiated premalignant lesions, which is perpetuated in colorectal cancers (CRCs). Acute inactivation of PKCλ/ι in vivo and in mouse organoids is sufficient to stimulate JNK in non-transformed intestinal epithelial cells (IECs), which promotes cell death and the rapid loss of the intestinal stem cells (ISCs), including those that are LGR5+. This is followed by the accumulation of revival stem cells (RSCs) at the bottom of the crypt and fetal-metaplastic cells (FMCs) at the top, creating two spatiotemporally distinct cell populations that depend on JNK-induced AP-1 and YAP. These cell lineage changes are maintained during cancer initiation and progression and determine the aggressive phenotype of human CRC, irrespective of their serrated or conventional origin.


Asunto(s)
Neoplasias Colorrectales , Células Epiteliales , Metaplasia , Proteína Quinasa C , Animales , Neoplasias Colorrectales/patología , Neoplasias Colorrectales/metabolismo , Neoplasias Colorrectales/genética , Proteína Quinasa C/metabolismo , Proteína Quinasa C/genética , Metaplasia/patología , Metaplasia/metabolismo , Ratones , Humanos , Células Epiteliales/metabolismo , Células Epiteliales/patología , Células Madre/metabolismo , Células Madre/patología , Factor de Transcripción AP-1/metabolismo , Factor de Transcripción AP-1/genética , Mucosa Intestinal/metabolismo , Mucosa Intestinal/patología , Proteínas Señalizadoras YAP/metabolismo , Transformación Celular Neoplásica/patología , Transformación Celular Neoplásica/metabolismo , Transformación Celular Neoplásica/genética , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Proteínas Adaptadoras Transductoras de Señales/genética , Proteínas Adaptadoras Transductoras de Señales/deficiencia , Organoides/metabolismo , Organoides/patología , Linaje de la Célula , Isoenzimas/metabolismo , Isoenzimas/genética , Isoenzimas/deficiencia , Células Madre Neoplásicas/patología , Células Madre Neoplásicas/metabolismo
11.
Fam Process ; 63(2): 843-864, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38632594

RESUMEN

Hurricane María caused significant devastation on the island of Puerto Rico, impacting thousands of lives. Puerto Rican crisis migrant families faced stress related to displacement and relocation (cultural stress), often exhibited mental health symptoms, and experienced distress at the family level. Although cultural stress has been examined as an individual experience, little work has focused on the experience as a family. To address this gap, we conducted a mixed-methods study designed to examine the predictive effects of cultural stress on family conflict and its mental health implications among Puerto Rican Hurricane María parent and child dyads living on the U.S. mainland. In the quantitative phase of the study, 110 parent-child dyads completed an online survey assessing cultural stress, family dynamics, and mental health. As part of our primary analysis, we estimated a structural equation path model. Findings from the quantitative phase showed a significant positive relationship between family cultural stress and family conflict, as well as individual parent and child mental health symptoms. In the qualitative phase of the study, 35 parent-child dyads participated in individual interviews. Findings from the interviews revealed variations in difficulties related to language, discrimination, and financial burdens, with some participants adapting more quickly and experiencing fewer stressors. Findings also highlight the impact on mental health for both parents and youth, emphasizing the family-level nature of cultural stress, while noting a potential discrepancy between qualitative and quantitative findings in the discussion of family conflict.


Asunto(s)
Salud Mental , Estrés Psicológico , Humanos , Puerto Rico/etnología , Femenino , Masculino , Estrés Psicológico/etnología , Estrés Psicológico/psicología , Adulto , Niño , Salud Mental/etnología , Tormentas Ciclónicas , Hispánicos o Latinos/psicología , Conflicto Familiar/psicología , Conflicto Familiar/etnología , Refugiados/psicología , Persona de Mediana Edad , Relaciones Familiares/psicología , Relaciones Familiares/etnología , Adolescente
12.
medRxiv ; 2024 Feb 28.
Artículo en Inglés | MEDLINE | ID: mdl-38463998

RESUMEN

The dynamics of SARS-CoV-2 transmission are influenced by a variety of factors, including social restrictions and the emergence of distinct variants. In this study, we delve into the origins and dissemination of the Alpha, Delta, and Omicron variants of concern in Galicia, northwest Spain. For this, we leveraged genomic data collected by the EPICOVIGAL Consortium and from the GISAID database, along with mobility information from other Spanish regions and foreign countries. Our analysis indicates that initial introductions during the Alpha phase were predominantly from other Spanish regions and France. However, as the pandemic progressed, introductions from Portugal and the USA became increasingly significant. Notably, Galicia's major coastal cities emerged as critical hubs for viral transmission, highlighting their role in sustaining and spreading the virus. This research emphasizes the critical role of regional connectivity in the spread of SARS-CoV-2 and offers essential insights for enhancing public health strategies and surveillance measures.

13.
Am J Orthopsychiatry ; 2024 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-38546564

RESUMEN

The present study examines the extent to which culturally stressful experiences may predict impaired well-being, increased internalizing symptoms (depression and anxiety), and increased externalizing problems (social aggression, physical aggression, and rule breaking) among a sample of Hispanic college students in Miami across a 12-day period. The predictive effects of cultural stressors on these outcomes were examined both (a) directly and (b) indirectly through daily fluctuations in students' personal identity synthesis and confusion. Results indicated direct predictive effects of cultural stress on four forms of well-being (self-esteem, life satisfaction, psychological well-being, and eudaimonic well-being), on symptoms of depression and anxiety, and on physical aggression and rule breaking. The predictive effects of cultural stress on all four forms of well-being and on symptoms of depression and anxiety were partially mediated through daily fluctuations (instability) in students' sense of personal identity synthesis. Findings were consistent across genders and between U.S.- and foreign-born students. Results are discussed in terms of implications for intervention and for policy. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

14.
Prev Sci ; 25(2): 209-212, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38265554

RESUMEN

For decades, human ecosystem disruptions (HEDs), including pandemics, natural disasters, and socio-economic crises, have shaped national and international responses affecting everyday life. These disruptions present challenges and opportunities for prevention science to address emerging behavioral and mental health research questions, intervention strategies, methodologies, analyses, and research collaboration. This paper introduces a special issue that aims to document examples of how prevention science research teams had (1) globally improved health and well-being through swift, scientifically based responses during HED events and (2) advanced our understanding of the conduct and outcomes of prevention intervention research during crises such as pandemics, natural disasters, and socio-economic crises. The issue presents six research studies conducted in over ten different countries (e.g., Australia, Mexico, China). This issue includes original empirical and descriptive work that addressed HED implications for preventive interventions at within-country and cross-national levels. The findings hold potential applications for responses during current and future pandemics and natural disasters. Participants reflected on methodological and contextual considerations during HEDs, such as navigating travel restrictions, adapting ongoing research efforts to accommodate scientific learning during disruptions, and assessing the impact of policies redistributing preventive resources during and after a HED.


Asunto(s)
Ecosistema , Pandemias , Humanos , Pandemias/prevención & control , Salud Mental , Investigación sobre Servicios de Salud , Australia
15.
Assessment ; 31(7): 1414-1429, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-38217446

RESUMEN

Anxiety is the most prevalent mental health disorder among adults worldwide. Given its increased prevalence among migrants due to their marginalized position in the societies where they reside, psychometric evaluations of anxiety measures such as the Generalized Anxiety Disorder-7 (GAD-7) are needed for use with migrants. The present study is the first attempt to compare the structure of GAD-7 scores for (a) different Latino groups in the same country and (b) the same Latino group in two different countries. Using three samples of Mexican and Venezuelan migrants (total N = 933), we provide reliability and validity evidence of the GAD-7 for use with adult Latino migrants. Utilizing confirmatory factor analysis and item response theory, we demonstrate that the GAD-7 is internally consistent, possesses a strong single-factor structure, and generates scores with equivalent psychometric properties. GAD-7 is appropriate for use with Mexican and Venezuelan migrants across differing gender groups and education levels.


Asunto(s)
Emigrantes e Inmigrantes , Hispánicos o Latinos , Psicometría , Humanos , Femenino , Masculino , Adulto , México/etnología , Hispánicos o Latinos/psicología , Venezuela , Emigrantes e Inmigrantes/psicología , Persona de Mediana Edad , Reproducibilidad de los Resultados , Trastornos de Ansiedad/diagnóstico , Trastornos de Ansiedad/etnología , Análisis Factorial , Adulto Joven , Comparación Transcultural , Adolescente
16.
Am Psychol ; 79(2): 299-311, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-36821363

RESUMEN

Scholarly citation represents one of the most common and essential elements of psychological science, from publishing research, to writing grant proposals, to presenting research at academic conferences. However, when authors mischaracterize prior research findings in their studies, such instances of miscitation call into question the reliability and credibility of scholarship within psychological science and can harm theory development, evidence-based practices, knowledge growth, and public trust in psychology as a legitimate science. Despite these implications, almost no research has considered the prevalence of miscitation in the psychological literature. In the largest study to date, we compared the accuracy of 3,347 citing claims to original findings across 89 articles in eight of top psychology journals. Results indicated that, although most (81.2%) citations were accurate, roughly 19% of citing claims either failed to include important nuances of results (9.3%) or completely mischaracterized findings from prior research altogether (9.5%). Moreover, the degree of miscitation did not depend on the number of authors on an article or the seniority of the first authors. Overall, results indicate that approximately one in every 10 citations completely mischaracterizes prior research in leading psychology journals. We offer five recommendations to help authors ensure that they cite prior research accurately. (PsycInfo Database Record (c) 2024 APA, all rights reserved).


Asunto(s)
Edición , Escritura , Reproducibilidad de los Resultados
17.
Nat Commun ; 14(1): 8075, 2023 Dec 13.
Artículo en Inglés | MEDLINE | ID: mdl-38092754

RESUMEN

The metabolic and signaling pathways regulating aggressive mesenchymal colorectal cancer (CRC) initiation and progression through the serrated route are largely unknown. Although relatively well characterized as BRAF mutant cancers, their poor response to current targeted therapy, difficult preneoplastic detection, and challenging endoscopic resection make the identification of their metabolic requirements a priority. Here, we demonstrate that the phosphorylation of SCAP by the atypical PKC (aPKC), PKCλ/ι promotes its degradation and inhibits the processing and activation of SREBP2, the master regulator of cholesterol biosynthesis. We show that the upregulation of SREBP2 and cholesterol by reduced aPKC levels is essential for controlling metaplasia and generating the most aggressive cell subpopulation in serrated tumors in mice and humans. Since these alterations are also detected prior to neoplastic transformation, together with the sensitivity of these tumors to cholesterol metabolism inhibitors, our data indicate that targeting cholesterol biosynthesis is a potential mechanism for serrated chemoprevention.


Asunto(s)
Proteína Quinasa C , Transducción de Señal , Animales , Humanos , Ratones , Transformación Celular Neoplásica/genética , Colesterol , Células Epiteliales/metabolismo , Proteína Quinasa C/genética , Proteína Quinasa C/metabolismo
19.
Artículo en Inglés | MEDLINE | ID: mdl-37917483

RESUMEN

OBJECTIVES: Following Hurricane Maria, scores of Puerto Rican "Maria migrants" fled the island with thousands permanently resettling on the United States (U.S.) mainland. Emerging evidence suggests that many Maria migrants are exposed to migration-related cultural stressors, including discrimination, negative context of reception, and language stress. The present study examines the associations of premigration hurricane trauma and postmigration cultural stress with posttraumatic stress disorder (PTSD) symptom severity and positive PTSD screens. METHOD: Participants were 319 adult (age 18+, 71% female) Puerto Rican Hurricane Maria survivors on the U.S. mainland. Data were collected virtually between August 2020 and October 2021. Participants completed Spanish-language measures of hurricane-related trauma, postmigration cultural stress exposure, PTSD symptoms, and positive screens. RESULTS: One in five (20.5%) Maria migrants reported PTSD scores in the range indicating a likely PTSD diagnosis (i.e., positive screen of 50+). Both hurricane trauma and migration-related cultural stressors independently predicted posttraumatic stress and positive PTSD screens. Additionally, controlling for the effect of hurricane trauma, discrimination and language stress were strongly linked with PTSD. Further, hurricane trauma and cultural stressors interact such that cultural stress predicts PTSD-positive screens at low-to-moderate levels of hurricane trauma exposure but not at high-to-very-high levels. CONCLUSION: Findings underscore the importance of providing mental health and other psychosocial supports to hurricane survivors and evacuees beyond the immediate aftermath of the disaster, and the need to consider both premigration trauma and postmigration experiences in terms of the mental health of crisis migrant populations. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

20.
Cureus ; 15(11): e49499, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-38024057

RESUMEN

Introduction Pain management is a crucial aspect of patients' perioperative journey and a fundamental duty of every anesthetist. Throughout anesthesia training, there is an emphasis on the management of critical incidents, several of which surround pain management. With changes to the anesthesia curriculum over recent years, variable exposure to training opportunities, and a reduction in clinical hours during training, many trainees report feeling underprepared for their future roles as consultants. However, pain management remains a small fragment of the core anesthesia curriculum with no pain-focused simulation courses currently available across the UK. Simulation has proven to aid learning transfer in complicated and stressful scenarios with a substantial improvement in knowledge retention and prevention of skill loss while eliminating the risk of harm to patients. Aim A novel perioperative pain management simulation course was designed and implemented in the East of England to equip junior anesthesia trainees with the knowledge, skills, and confidence to manage perioperative pain and the associated critical incidents. Methods A multidisciplinary team (MDT) was involved in the course design. The faculty consisted of anesthesia consultants, trainees, pain nurses, and simulation technicians. The course ran twice over a six-month period both locally and regionally. A blended learning approach was adopted where 17 trainees attended PowerPoint presentations providing an overview of basic pain theories, perioperative pain management, regional anesthesia, and labor analgesia. Trainees then underwent telecasted simulation training using replicated patient notes, imaging, blood gas analysis, and a high-fidelity SimMan®. A debriefing period followed each scenario using Pendleton's model. An anonymized questionnaire was completed by all trainees before and after the course to assess improvement in their knowledge and confidence levels across four domains covering the management of perioperative pain. Results All 17 trainees completed the questionnaire; therefore, the entire dataset was analyzed. The pre-course questionnaire showed that using a scale of zero to 10, the vast majority of trainees reported low levels of confidence (<6/10) in the management of chronic pain during the perioperative period (82%), intraoperative pain management (76%), regional anesthesia (88%), and labor analgesia (65%). Following the simulation training, the results showed an overwhelmingly positive improvement in all 17 trainees' knowledge and confidence across all four tested domains. All 17 trainees (100%) also showed an improvement in their understanding of local pain protocols. The subjective feedback was positive, highlighting the overall usefulness of the course and that the tailored complexity of each simulation scenario was appropriate to each candidate's prior level of experience. Trainees also reported feeling more confident in starting their anesthesia on-calls. Conclusion This novel simulation course is the first of its kind in pain management. It has shown great improvements in trainee confidence in managing perioperative pain and the associated critical incidents. Subjective feedback has also been positively reassuring. Its inclusion into the East of England anesthesia training program and national training curriculum would greatly enhance trainee's knowledge and experience in pain management in the perioperative setting.

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