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1.
Artículo en Inglés | MEDLINE | ID: mdl-39268199

RESUMEN

The utilization and application of genomic information generated from precision medicine continues to increase with the goal of improving health outcomes. Increasingly researchers, health care professionals, and public health teams include an examination of the ethical, legal, and social issues (ELSI) in their consideration of the use of precision medicine for newborn and pediatric health. In addition to ELSI considerations, stakeholders could benefit from an understanding of economics, the other "E" in ELSI. The use of an economic evaluation could aid decision-making on whether to screen newborns who may be at risk for disease, to diagnose newborns and children who present with symptoms, to inform the treatment and management of diagnosed individuals. In this manuscript we review the core concepts of economic evaluation, the framework of decision-analysis, and key parameters for consideration in assessing the economics of NBS program(s). We describe the common language used in the economic evaluation and provide a practical overview of health economic evaluations including 1) their purpose, 2) different types and components, 3) evaluation of the different types and components of economic evaluations (i.e., cost-effectiveness vs. cost-benefit analysis), 4) impact of societal or healthcare perspectives on the analysis, 5) health outcomes, 6) time horizon for the analysis, 7) identification of appropriate comparators, and 8) resources for economic data. We conclude with a use case to demonstrate the application and understanding of economic considerations for in the advancement and expansion of NBS.

2.
J Clin Oncol ; : JCO2302510, 2024 Sep 03.
Artículo en Inglés | MEDLINE | ID: mdl-39226514

RESUMEN

PURPOSE: To investigate the use of radiation with radiosensitizing chemotherapy following repeated transurethral resection (trimodality therapy) as an alternative to radical cystectomy in T1 bladder cancer which has failed Bacillus Calmette-Guerin (BCG). PATIENTS AND METHODS: Patients with recurrent T1 bladders who had failed BCG and were recommended to undergo cystectomy were treated with trimodality therapy. The primary end point was 3-year freedom from cystectomy. Secondary end points were distant metastasis at 3 and 5 years, local recurrence, disease-specific and overall survival (OS), and safety. RESULTS: This single-arm phase II study enrolled 37 patients. Efficacy and safety were evaluated in 34 patients after three exclusions. The median follow-up was 5.1 years. The 3-year freedom from cystectomy rate was 88% (lower one-sided 97.5% confidence limit [CI], 72%), meeting the primary study goal. OS at 3 and 5 years was 69% (95% CI, 54 to 85) and 56% (95% CI, 39 to 74), respectively. The distant metastasis rates at 3 and 5 years were 12% (95% CI, 4 to 26) and 19% (95% CI, 7 to 34), respectively. Eight patients died due to urothelial cancer, 12 exhibited local recurrence at 3 years (cumulative incidence: 32%; 95% CI, 17 to 48), 18 experienced grade 3 adverse events, mostly hematological, and one developed grade 4 neutropenia. CONCLUSION: Trimodality therapy is an effective potential alternative to radical cystectomy for recurrent high-grade T1 urothelial cancer of the bladder. At 3 years, 88% of the patients remained free of cystectomy.

3.
PNAS Nexus ; 3(8): pgae277, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39192846

RESUMEN

With climate extremes hitting nations across the globe, disproportionately burdening vulnerable developing countries, the prompt operation of the Loss and Damage fund is of paramount importance. As decisions on resource disbursement at the international level, and investment strategies at the national level, loom, the climate science community's role in providing fair and effective evidence is crucial. Attribution science can provide useful information for decision makers, but both ethical implications and deep uncertainty cannot be ignored. Considering these aspects, we articulate a vision that integrates established attribution methods and multiple lines of evidence within a coherent logical framework.

4.
Implement Sci ; 19(1): 61, 2024 Aug 19.
Artículo en Inglés | MEDLINE | ID: mdl-39160614

RESUMEN

BACKGROUND: Germline genetic testing is recommended for an increasing number of conditions with underlying genetic etiologies, the results of which impact medical management. However, genetic testing is underutilized in clinics due to system, clinician, and patient level barriers. Behavioral economics provides a framework to create implementation strategies, such as nudges, to address these multi-level barriers and increase the uptake of genetic testing for conditions where the results impact medical management. METHODS: Patients meeting eligibility for germline genetic testing for a group of conditions will be identified using electronic phenotyping algorithms. A pragmatic, type 3 hybrid cluster randomization study will test nudges to patients and/or clinicians, or neither. Clinicians who receive nudges will be prompted to either refer their patient to genetics or order genetic testing themselves. We will use rapid cycle approaches informed by clinician and patient experiences, health equity, and behavioral economics to optimize these nudges before trial initiation. The primary implementation outcome is uptake of germline genetic testing for the pre-selected health conditions. Patient data collected through the electronic health record (e.g. demographics, geocoded address) will be examined as moderators of the effect of nudges. DISCUSSION: This study will be one of the first randomized trials to examine the effects of patient- and clinician-directed nudges informed by behavioral economics on uptake of genetic testing. The pragmatic design will facilitate a large and diverse patient sample, allow for the assessment of genetic testing uptake, and provide comparison of the effect of different nudge combinations. This trial also involves optimization of patient identification, test selection, ordering, and result reporting in an electronic health record-based infrastructure to further address clinician-level barriers to utilizing genomic medicine. The findings may help determine the impact of low-cost, sustainable implementation strategies that can be integrated into health care systems to improve the use of genomic medicine. TRIAL REGISTRATION: ClinicalTrials.gov. NCT06377033. Registered on March 31, 2024. https://clinicaltrials.gov/study/NCT06377033?term=NCT06377033&rank=1.


Asunto(s)
Pruebas Genéticas , Genómica , Humanos , Pruebas Genéticas/métodos , Genómica/métodos , Registros Electrónicos de Salud , Economía del Comportamiento , Ciencia de la Implementación
5.
Diagn Microbiol Infect Dis ; 110(3): 116481, 2024 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-39128206

RESUMEN

We compared clinical outcomes of patients who received monotherapy and combination therapy for treatment of MDR A. baumannii VAP. 170 patients were included. Vasopressor use and mortality rate were higher for combination therapy (69.3% versus 28.6%, p=0.024; 67.5% versus 14.3%, p=0.007; respectively). Majority received polymyxin B-based combination therapy, with higher mortality than those without polymyxin B (80.2% versus 19.8%, p=0.043). After adjusting for vasopressor use, monotherapy, dual combination, and triple combination therapy were not associated with mortality (aHR 0.24, 95% CI 0.03 to 1.79, p=0.169; aHR 1.26, 95% CI 0.79 to 2.00, p=0.367; aHR 0.93, 95% CI 0.57 to 1.49, p=0.744; respectively). There was no difference in adverse effects and length of stay between the two groups. Mortality from MDR A. baumannii VAP was high and not associated with monotherapy or combination therapy after adjustment for vasopressor use. Antibiotic regimens other than those containing polymyxin are urgently needed for the treatment of these infections.


Asunto(s)
Infecciones por Acinetobacter , Acinetobacter baumannii , Antibacterianos , Farmacorresistencia Bacteriana Múltiple , Quimioterapia Combinada , Neumonía Asociada al Ventilador , Centros de Atención Terciaria , Humanos , Acinetobacter baumannii/efectos de los fármacos , Antibacterianos/uso terapéutico , Femenino , Masculino , Neumonía Asociada al Ventilador/tratamiento farmacológico , Neumonía Asociada al Ventilador/microbiología , Persona de Mediana Edad , Infecciones por Acinetobacter/tratamiento farmacológico , Infecciones por Acinetobacter/mortalidad , Infecciones por Acinetobacter/microbiología , Anciano , Resultado del Tratamiento , Adulto , Polimixina B/uso terapéutico , Polimixina B/administración & dosificación , Estudios Retrospectivos
6.
Ann Am Thorac Soc ; 2024 Jul 23.
Artículo en Inglés | MEDLINE | ID: mdl-39041864

RESUMEN

Rationale Evaluating approaches to reduce treatment burden is a research priority among people with CF (pwCF) on highly effective modulators including elexacaftor/tezacaftor/ivacaftor (ETI). Objective To evaluate the impact of discontinuing both hypertonic saline (HS) and dornase alfa (DA) versus continuing both therapies among a subgroup of participants in the SIMPLIFY study who sequentially participated in trials evaluating the independent clinical effects of discontinuing HS and DA. Methods SIMPLIFY participants ≥12 years old on ETI and comprising a subgroup using both HS and DA at study entry were randomized to the HS or DA trial, and then randomized 1:1 to continue or discontinue the applicable therapy for 6 weeks. After completion of the first trial, eligible participants could enroll in the second trial beginning with a 2-week run in. Study outcomes were compared across the duration of SIMPLIFY participation between a cohort remaining on both therapies during SIMPLIFY versus a cohort that sequentially discontinued both as a result of trial randomizations. Multivariable regression models were used to estimate treatment differences, adjusted for time between trials, trial order, baseline age, sex at birth and percent predicted forced expiratory volume in one second (ppFEV1) at study entry. Results There were 43 participants who discontinued both therapies by the end of SIMPLIFY and 63 who remained on both, with overall average ppFEV1 at study entry 96.7% and average duration of follow up from beginning of the first trial to completion of the second trial 3.9 months, including time between trials. No clinically meaningful difference in the change in ppFEV1 from baseline to completion of the second trial was observed between those who discontinued versus remained on both therapies (difference: 0.22% Off-On, 95% CI: -1.60,2.03). Changes in LCI2.5, patient reported, and safety outcomes were also comparable. Patient reported treatment burden, as measured by a CFQ-R subscale, significantly decreased in those discontinuing both therapies. Conclusions SIMPLIFY participants who sequentially discontinued both HS and DA experienced no meaningful changes in clinical outcomes and reported decreased treatment burden as compared to those who remained on both therapies. These data continue to inform a new era of post-modulator care of pwCF.

7.
J Cyst Fibros ; 2024 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-38987119

RESUMEN

BACKGROUND: Lung inflammation is associated with tissue damage in cystic fibrosis (CF). LAU-7b, a novel oral drug candidate, was shown to control inflammation and stabilize CFTR protein in the epithelial membrane during inflammatory stress in preclinical models of CF. METHODS: A double-blind, randomized, placebo-controlled Phase 2 study was conducted to evaluate efficacy and safety of LAU-7b in adults with CF. LAU-7b or placebo was administered over 24 weeks as six 21-day treatment cycles each separated by 7 days. The primary efficacy endpoint was the absolute change from baseline in percent predicted forced expiratory volume in 1 second (ppFEV1) at 24 weeks. RESULTS: A total of 166 subjects received at least one dose of study drug (Intent-To-Treat population, ITT), of which 122 received ≥5 treatment cycles (Per-Protocol population, PP). Both treatment arms showed a mean lung function loss at 24 weeks of 1.18 ppFEV1 points with LAU-7b and 1.95 ppFEV1 with placebo, a 0.77 ppFEV1 (40 s) difference, p=0.345, and a 0.95 ppFEV1 (49 %) difference in the same direction in PP population, p=0.263. Primary analysis of mean ppFEV1 through 24 weeks showed differences of 1.01 and 1.23 ppFEV1, in the ITT (65 % less loss, p=0.067) and PP populations (78 % less loss, reaching statistical significance p=0.049), respectively. LAU-7b had an acceptable safety profile. CONCLUSION: Although the study did not meet its primary efficacy endpoint in the ITT population, LAU-7b was generally well tolerated and showed evidence of preservation of lung function to support further development.

8.
Res Sq ; 2024 Jul 18.
Artículo en Inglés | MEDLINE | ID: mdl-39070633

RESUMEN

Purpose: The number of ischemic heart failure (HF) patients is growing dramatically worldwide. However, there are at present no preventive treatments for HF. Our previous study showed that Gata4 overexpression improved cardiac function after myocardial infarction in the rat heart. We also found that Gata4 overexpression significantly increased a Pnoc gene expression, an endogenous ligand for cell membrane receptor, ORL1. We hypothesized that an activation of ORL1 receptor would suppress HF in a rat ischemic heart model. Method: Adult Sprague Dawley rats (8 weeks old, 6 males and 6 females) underwent left anterior descending coronary artery ligation. Three weeks later, normal saline or MCOPPB (ORL1 activator, 2.5mg/kg/day) intraperitoneal injection was started, and continued 5 days a week, for 3 months. Echocardiography was performed six times, pre-operative, 3 days after coronary artery ligation, pre-MCOPPB or saline injection, and 1, 2, and 3 months after saline or MCOPPB injection started. Animals were euthanized after 3 months follow up and the heart was harvested for histological analysis. Results: ORL1 activator, MCOPPB, significantly improved cardiac function after myocardial infarction in rat (Ejection fraction, MCOPPB vs saline at euthanasia, 67 ± 3 vs 43 ± 2, p < 0.001). MCOPPB also decreased fibrosis and induced angiogenesis. Conclusion: ORL1 activator, MCOPPB, may be a novel treatment for preventing HF progression.

9.
Mayo Clin Proc Innov Qual Outcomes ; 8(3): 279-292, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38828080

RESUMEN

Chronic diseases are the leading cause of death and disability in the United States, and much of this burden can be attributed to lifestyle and behavioral risk factors. Lifestyle medicine is an approach to preventing and treating lifestyle-related chronic disease using evidence-based lifestyle modification as a primary modality. NYC Health + Hospitals, the largest municipal public health care system in the United States, is a national pioneer in incorporating lifestyle medicine systemwide. In 2019, a pilot lifestyle medicine program was launched at NYC Health + Hospitals/Bellevue to improve cardiometabolic health in high-risk patients through intensive support for evidence-based lifestyle changes. Analyses of program data collected from January 29, 2019 to February 26, 2020 demonstrated feasibility, high demand for services, high patient satisfaction, and clinically and statistically significant improvements in cardiometabolic risk factors. This pilot is being expanded to 6 new NYC Health + Hospitals sites spanning all 5 NYC boroughs. As part of the expansion, many changes have been implemented to enhance the original pilot model, scale services effectively, and generate more interest and incentives in lifestyle medicine for staff and patients across the health care system, including a plant-based default meal program for inpatients. This narrative review describes the pilot model and outcomes, the expansion process, and lessons learned to serve as a guide for other health systems.

10.
iScience ; 27(6): 110146, 2024 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-38904066

RESUMEN

The ancestral gamete fusion protein, HAP2/GCS1, plays an essential role in fertilization in a broad range of taxa. To identify factors that may regulate HAP2/GCS1 activity, we screened mutants of the ciliate Tetrahymena thermophila for behaviors that mimic Δhap2/gcs1 knockout phenotypes in this species. Using this approach, we identified two new genes, GFU1 and GFU2, whose products are necessary for membrane pore formation following mating type recognition and adherence. GFU2 is predicted to be a single-pass transmembrane protein, while GFU1, though lacking obvious transmembrane domains, has the potential to interact directly with membrane phospholipids in the cytoplasm. Like Tetrahymena HAP2/GCS1, expression of GFU1 is required in both cells of a mating pair for efficient fusion to occur. To explain these bilateral requirements, we propose a model that invokes cooperativity between the fusion machinery on apposed membranes of mating cells and accounts for successful fertilization in Tetrahymena's multiple mating type system.

11.
Acta Med Philipp ; 58(7): 110-128, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38882921

RESUMEN

Objectives: To gather, summarize, and appraise the available evidence on: 1) the accuracy of chest CT scan in diagnosing COVID-19 among children, and 2) the characteristic chest CT scan findings associated with COVID-19 pneumonia in children. Methods: We comprehensively searched databases (MEDLINE, COCHRANE), clinical trial registries, bibliographic lists of selected studies, and unpublished data for relevant studies. Guide questions from the Painless Evidence Based Medicine and the National Institutes of Health Quality Assessment Tools were used to assess study quality. Results: A poor quality study showed 86.0% (95% CI 73.8, 93.0) sensitivity and 75.9% (95% CI 67.1, 83.0) specificity of chest CT scan in diagnosing COVID-19 in children. Thirty-nine observational studies describing chest CT scan in children with COVID-19 showed abnormal findings in 717 of 1028 study subjects. Common chest CT scan findings in this population include: 1) ground glass opacities, patchy shadows, and consolidation, 2) lower lobe involvement, and 3) unilateral lung lesions. Conclusion: Studies which investigate the accuracy of chest CT scan in the diagnosis of COVID-19 in children are limited by heterogeneous populations and small sample sizes. While chest CT scan findings such as patchy shadows, ground glass opacities, and consolidation are common in children with COVID-19, these may be similar to the imaging findings of other respiratory viral illnesses.

12.
Eur Urol ; 86(3): 289-290, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38897867

RESUMEN

BACKGROUND: Intensification of therapy may improve outcomes for patients with high-risk localized prostate cancer. OBJECTIVE: To provide long-term follow-up data from phase III RTOG 0521, which compared a combination of androgen deprivation therapy (ADT) + external beam radiation therapy (EBRT) + docetaxel with ADT + EBRT. DESIGN, SETTING, AND PARTICIPANTS: High-risk localized prostate cancer patients (>50% of patients had Gleason 9-10 disease) were prospectively randomized to 2 yr of ADT + EBRT or ADT + EBRT + six cycles of docetaxel. A total of 612 patients were accrued, and 563 were eligible and included in the modified intent-to-treat analysis. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: The primary endpoint was overall survival (OS). Analyses with Cox proportional hazards were performed as prespecified in the protocol; however, there was evidence of nonproportional hazards. Thus, a post hoc analysis was performed using the restricted mean survival time (RMST). The secondary endpoints included biochemical failure, distant metastasis (DM) as detected by conventional imaging, and disease-free survival (DFS). RESULTS AND LIMITATIONS: After 10.4 yr of median follow-up among survivors, the hazard ratio (HR) for OS was 0.89 (90% confidence interval [CI] 0.70-1.14; one-sided log-rank p = 0.22). Survival at 10 yr was 64% for ADT + EBRT and 69% for ADT + EBRT + docetaxel. The RMST at 12 yr was 0.45 yr and not statistically significant (one-sided p = 0.053). No differences were detected in the incidence of DFS (HR = 0.92, 95% CI 0.73-1.14), DM (HR = 0.84, 95% CI 0.73-1.14), or prostate-specific antigen recurrence risk (HR = 0.97, 95% CI 0.74-1.29). Two patients had grade 5 toxicity in the chemotherapy arm and zero patients in the control arm. CONCLUSIONS: After a median follow-up of 10.4 yr among surviving patients, no significant differences are observed in clinical outcomes between the experimental and control arms. These data suggest that docetaxel should not be used for high-risk localized prostate cancer. Additional research may be warranted using novel predictive biomarkers. PATIENT SUMMARY: No significant differences in survival were noted after long-term follow-up for high-risk localized prostate cancer patients in a large prospective trial where patients were treated with androgen deprivation therapy + radiation to the prostate ± docetaxel.

13.
Clin Cancer Res ; 30(15): 3098-3099, 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-38767553

RESUMEN

Progression-free survival as a primary endpoint for comparative trials does not fully capture the therapeutic risk/benefit ratio. Additionally, summarization of the treatment effect via a hazard ratio is problematic when the proportional hazards assumption is violated. Restricted mean survival time metrics may address these challenges but have other limitations. See related article by Chang et al., p. 3282.


Asunto(s)
Ensayos Clínicos como Asunto , Neoplasias , Humanos , Neoplasias/mortalidad , Neoplasias/terapia , Supervivencia sin Progresión , Determinación de Punto Final , Oncología Médica/métodos , Modelos de Riesgos Proporcionales
14.
Artículo en Inglés | MEDLINE | ID: mdl-38803190

RESUMEN

Melanin, particularly eumelanin, is commonly viewed as an efficient antioxidant and photoprotective pigment. Nonetheless, the ability of melanin to photogenerate reactive oxygen species and sensitize the formation of cyclobutane pyrimidine dimers may contribute to melanin-dependent phototoxicity. The phototoxic potential of melanin depends on a variety of factors, including molecular composition, redox state, and degree of aggregation. Using complementary spectroscopic and analytical methods we analyzed the physicochemical properties of Dopa-melanin, a synthetic model of eumelanin, subjected to oxidative degradation induced by aerobic photolysis or exposure to 0.1 M hydrogen peroxide. Both modes of oxidative degradation were accompanied by dose-dependent bleaching of melanin and irreversible modifications of its paramagnetic, ion- and electron-exchange and antioxidant properties. Bleached melanin exhibited enhanced efficiency to photogenerate singlet oxygen in both UVA and short-wavelength visible light. Although chemical changes of melanin subunits, including a relative increase of DHICA content and disruption of melanin polymer induced by oxidative degradation were considered, these two mechanisms may not be sufficient for a satisfactory explanation of the elevated photosensitizing ability of the bleached eumelanin. This study points out possible adverse changes in the photoprotective and antioxidant properties of eumelanin that could occur in pigmented tissues after exposure to high doses of intense solar radiation.

15.
JAMA Netw Open ; 7(5): e2412291, 2024 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-38805228

RESUMEN

Importance: Neurodevelopmental outcomes for children with congenital heart defects (CHD) have improved minimally over the past 20 years. Objectives: To assess the feasibility and tolerability of maternal progesterone therapy as well as the magnitude of the effect on neurodevelopment for fetuses with CHD. Design, Setting, and Participants: This double-blinded individually randomized parallel-group clinical trial of vaginal natural progesterone therapy vs placebo in participants carrying fetuses with CHD was conducted between July 2014 and November 2021 at a quaternary care children's hospital. Participants included maternal-fetal dyads where the fetus had CHD identified before 28 weeks' gestational age and was likely to need surgery with cardiopulmonary bypass in the neonatal period. Exclusion criteria included a major genetic or extracardiac anomaly other than 22q11 deletion syndrome and known contraindication to progesterone. Statistical analysis was performed June 2022 to April 2024. Intervention: Participants were 1:1 block-randomized to vaginal progesterone or placebo by diagnosis: hypoplastic left heart syndrome (HLHS), transposition of the great arteries (TGA), and other CHD diagnoses. Treatment was administered twice daily between 28 and up to 39 weeks' gestational age. Main Outcomes and Measures: The primary outcome was the motor score of the Bayley Scales of Infant and Toddler Development-III; secondary outcomes included language and cognitive scales. Exploratory prespecified subgroups included cardiac diagnosis, fetal sex, genetic profile, and maternal fetal environment. Results: The 102 enrolled fetuses primarily had HLHS (n = 52 [50.9%]) and TGA (n = 38 [37.3%]), were more frequently male (n = 67 [65.7%]), and without genetic anomalies (n = 61 [59.8%]). The mean motor score differed by 2.5 units (90% CI, -1.9 to 6.9 units; P = .34) for progesterone compared with placebo, a value not statistically different from 0. Exploratory subgroup analyses suggested treatment heterogeneity for the motor score for cardiac diagnosis (P for interaction = .03) and fetal sex (P for interaction = .04), but not genetic profile (P for interaction = .16) or maternal-fetal environment (P for interaction = .70). Conclusions and Relevance: In this randomized clinical trial of maternal progesterone therapy, the overall effect was not statistically different from 0. Subgroup analyses suggest heterogeneity of the response to progesterone among CHD diagnosis and fetal sex. Trial Registration: ClinicalTrials.gov Identifier: NCT02133573.


Asunto(s)
Cardiopatías Congénitas , Progesterona , Humanos , Progesterona/uso terapéutico , Femenino , Cardiopatías Congénitas/tratamiento farmacológico , Cardiopatías Congénitas/complicaciones , Masculino , Embarazo , Método Doble Ciego , Lactante , Adulto , Recién Nacido , Desarrollo Infantil/efectos de los fármacos , Progestinas/uso terapéutico , Trastornos del Neurodesarrollo
16.
Nat Commun ; 15(1): 4316, 2024 May 21.
Artículo en Inglés | MEDLINE | ID: mdl-38773095

RESUMEN

As signalling organelles, cilia regulate their G protein-coupled receptor content by ectocytosis, a process requiring localised actin dynamics to alter membrane shape. Photoreceptor outer segments comprise an expanse of folded membranes (discs) at the tip of highly-specialised connecting cilia, into which photosensitive GPCRs are concentrated. Discs are shed and remade daily. Defects in this process, due to mutations, cause retinitis pigmentosa (RP). Whilst fundamental for vision, the mechanism of photoreceptor disc generation is poorly understood. Here, we show membrane deformation required for disc genesis is driven by dynamic actin changes in a process akin to ectocytosis. We show RPGR, a leading RP gene, regulates actin-binding protein activity central to this process. Actin dynamics, required for disc formation, are perturbed in Rpgr mouse models, leading to aborted membrane shedding as ectosome-like vesicles, photoreceptor death and visual loss. Actin manipulation partially rescues this, suggesting the pathway could be targeted therapeutically. These findings help define how actin-mediated dynamics control outer segment turnover.


Asunto(s)
Actinas , Proteínas del Ojo , Retinitis Pigmentosa , Animales , Actinas/metabolismo , Ratones , Retinitis Pigmentosa/metabolismo , Retinitis Pigmentosa/genética , Proteínas del Ojo/metabolismo , Proteínas del Ojo/genética , Cilios/metabolismo , Humanos , Segmento Externo de las Células Fotorreceptoras Retinianas/metabolismo , Ratones Noqueados , Ratones Endogámicos C57BL , Membrana Celular/metabolismo
17.
Cureus ; 16(4): e59329, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38694684

RESUMEN

During World War I (WWI), also referred to as 'The Great War,' Germany implemented a pioneering biowarfare program as part of a broader military strategy to undermine Allied forces by targeting their logistical and supply capabilities. This initiative, unprecedented in its systematic and strategic application, utilized a variety of pathogens, primarily targeting animal populations, to disrupt support systems without contravening international laws, specifically the 1907 Hague Convention. The operations, shrouded in secrecy and largely led by the German General Staff, included sophisticated sabotage actions against both enemy and neutral states. The allegations and usage of bioweapons increased the interest of the Great Powers in further developing their own biowarfare program.

18.
Pediatr Pulmonol ; 59(6): 1724-1730, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38607242

RESUMEN

BACKGROUND: Cystic fibrosis (CF) is caused by CF transmembrane conductance regulator (CFTR) gene mutations producing dysfunctional CFTR proteins leading to progressive clinical disease. Elexacaftor-tezacaftor-ivacaftor (ETI) remarkably improves lung disease but is associated with substantial weight gain. STUDY DESIGN AND METHODS: We performed a single-center longitudinal study predicting 6-month weight gain after ETI initiation. We used linear mixed effects modeling (LME) to determine association of ETI treatment with changing body mass index (BMI). Using linear regression, we examined BMI prediction models with distinct combinations of main effects to identify a model useful for patient counseling. We used up to eight commonly observed clinical characteristics as input variables (age, sex, percent predicted FEV1 [FEV1%], F508del homozygous state, pancreatic sufficiency, HgbA1c, prior modulator use and prior year number of pulmonary exacerbations). RESULTS: We evaluated 154 patients (19-73 years old, 54% female, FEV1% = 19-121, 0-6 prior year pulmonary exacerbations). LME demonstrated an association between ETI use and weight increases. Exhaustive testing suggested a parsimonious linear regression model well-fitted to data that is potentially useful for counseling. The two variable model shows that on average, BMI decreases by 0.045 (95% Confidence Interval [CI] = -0.069 to -0.021, p < 0.001) for every year of age and increases by 0.322 (CI = 0.142 to 0.502, p = 0.001) for each additional prior year exacerbation at the time of ETI initiation. INTERPRETATION: Young patients with many prior year pulmonary exacerbations likely have the largest 6 month weight gain after starting ETI.


Asunto(s)
Aminofenoles , Índice de Masa Corporal , Fibrosis Quística , Combinación de Medicamentos , Indoles , Aumento de Peso , Humanos , Fibrosis Quística/tratamiento farmacológico , Fibrosis Quística/fisiopatología , Fibrosis Quística/genética , Femenino , Masculino , Aumento de Peso/efectos de los fármacos , Adulto , Aminofenoles/uso terapéutico , Adulto Joven , Persona de Mediana Edad , Estudios Longitudinales , Indoles/uso terapéutico , Regulador de Conductancia de Transmembrana de Fibrosis Quística/genética , Quinolonas/uso terapéutico , Anciano , Benzodioxoles/uso terapéutico , Pirroles/uso terapéutico , Piridinas/uso terapéutico , Pirazoles/uso terapéutico , Quinolinas
19.
Vector Borne Zoonotic Dis ; 24(8): 520-531, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38648543

RESUMEN

Background: West Nile virus (WNV), Everglades virus (EVEV), and five species of Orthobunyavirus were isolated from mosquitoes collected in the Everglades in 2016-2017. Prior studies of blood meals of mosquitoes in southern Florida have related findings to acquisition and transmission of EVEV, St. Louis encephalitis virus, and WNV, but not the Orthobunyavirus viruses associated with the subgenus Melanoconion of the genus Culex. Materials and Methods: In the present study, blood-fed mosquitoes were collected in the Everglades in 2016, 2017, 2021, and 2022, and from an industrial site in Naples, FL in 2017. Blood meals were identified to host species by PCR assays using mitochondrial cytochrome b gene. Results: Blood meals were identified from Anopheles crucians complex and 11 mosquito species captured in the Florida Everglades and from 3 species collected from an industrial site. The largest numbers of blood-fed specimens were from Culex nigripalpus, Culex erraticus, Culex cedecei, and Aedes taeniorhynchus. Cx. erraticus fed on mammals, birds, and reptiles, particularly American alligator. This mosquito species could transmit WNV to American alligator in the wild. Cx. nigripalpus acquired blood meals primarily from birds and mammals and frequently fed on medium-sized mammals and white-tailed deer. Water and wading birds were the primary avian hosts for Cx. nigripalpus and Cx. erraticus in the Everglades. Wading birds are susceptible to WNV and could serve as reservoir hosts. Cx. cedecei fed on five species of rodents, particularly black and hispid cotton rats. EVEV and three different species of Orthobunyavirus have been isolated from the hispid cotton rat and Cx. cedecei in the Everglades. Cx. cedecei is likely acquiring and transmitting these viruses among hispid cotton rats and other rodents. The marsh rabbit was a frequent host for An. crucians complex. An. crucians complex, and other species could acquire Tensaw virus from rabbits. Conclusions: Our study contributes to a better understanding of the host and viral associations of mosquito species in southwestern Florida.


Asunto(s)
Culicidae , Conducta Alimentaria , Animales , Florida , Culicidae/virología , Culicidae/fisiología , Mosquitos Vectores/virología , Mosquitos Vectores/fisiología , Aves/virología , Mamíferos/virología
20.
Stereotact Funct Neurosurg ; 102(3): 141-155, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38636468

RESUMEN

INTRODUCTION: Deep brain stimulation (DBS) is a well-established surgical therapy for patients with Parkinsons' Disease (PD). Traditionally, DBS surgery for PD is performed under local anesthesia, whereby the patient is awake to facilitate intraoperative neurophysiological confirmation of the intended target using microelectrode recordings. General anesthesia allows for improved patient comfort without sacrificing anatomic precision and clinical outcomes. METHODS: We performed a systemic review and meta-analysis on patients undergoing DBS for PD. Published randomized controlled trials, prospective and retrospective studies, and case series which compared asleep and awake techniques for patients undergoing DBS for PD were included. A total of 19 studies and 1,900 patients were included in the analysis. RESULTS: We analyzed the (i) clinical effectiveness - postoperative UPDRS III score, levodopa equivalent daily doses and DBS stimulation requirements. (ii) Surgical and anesthesia related complications, number of lead insertions and operative time (iii) patient's quality of life, mood and cognitive measures using PDQ-39, MDRS, and MMSE scores. There was no significant difference in results between the awake and asleep groups, other than for operative time, for which there was significant heterogeneity. CONCLUSION: With the advent of newer technology, there is likely to have narrowing differences in outcomes between awake or asleep DBS. What would therefore be more important would be to consider the patient's comfort and clinical status as well as the operative team's familiarity with the procedure to ensure seamless transition and care.


Asunto(s)
Estimulación Encefálica Profunda , Enfermedad de Parkinson , Vigilia , Estimulación Encefálica Profunda/métodos , Humanos , Enfermedad de Parkinson/terapia , Enfermedad de Parkinson/cirugía , Anestesia General/métodos , Resultado del Tratamiento , Anestesia/métodos
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