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2.
Actas Dermosifiliogr ; 2024 Oct 08.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-39389350

RESUMO

INTRODUCTION: in 2017, the Spanish Academy of Dermatology and Venereology Psoriasis Working Group (PWG) designed the Minimal Disease Activity (MDA) criteria to determine the level of disease activity. We hereby present the results of an observational, cross-sectional, multicenter study of the nationwide application of these criteria. MATERIAL AND METHODS: we conducted a non-randomized sampling, stratified to achieve autonomic and provincial representation of consecutive patients with psoriasis (Ps) vulgaris without active arthritis. A total of 830 patients were included: 493 men (59.5%), with a mean age of 51.4 years (SD, 14.2), from all autonomous regions of Spain (except for Ceuta and Melilla) and 44 (88%) out of the 50 provinces. A questionnaire was obtained with demographic data, DLQI, subjective assessment-on a scale from 0 to 10-of itching, erythema, desquamation, visibility, and the patients' PASI and BSA. RESULTS: more than 50% failed to meet the MDA criteria (491; 59.2%), with significant differences being reported by region, sex, and age. Additionally, significant differences were reported based on the therapy used (p < 0.001). The use of biological therapies was associated with higher MDA compliance compared to other therapies (59.4% vs 23.3%). No differences were reported among various biological therapies. CONCLUSIONS: the overall rate of MDA compliance is low, with differences being based on geographic location, sex, age, and drug used, yet none of these factors separately justify them.

3.
Mol Reprod Dev ; 91(10): e70000, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39422082

RESUMO

The development of novel non-hormonal male contraceptives represents a pivotal frontier in reproductive health, driven by the need for safe, effective, and reversible contraceptive methods. This comprehensive review explores the genetic underpinnings of male fertility, emphasizing the crucial roles of specific genes and structural variants (SVs) identified through advanced sequencing technologies such as long-read sequencing (LRS). LRS has revolutionized the detection of structural variants and complex genomic regions, offering unprecedented precision and resolution over traditional next-generation sequencing (NGS). Key genetic targets, including those implicated in spermatogenesis and sperm motility, are highlighted, showcasing their potential as non-hormonal contraceptive targets. The review delves into the systematic identification and validation of male reproductive tract-specific genes, utilizing advanced transcriptomics and genomics studies with validation using novel knockout mouse models. We discuss the innovative application of small molecule inhibitors, developed through platforms like DNA-encoded chemistry technology (DEC-Tec), which have shown significant promise in preclinical models. Notable examples include inhibitors targeting serine/threonine kinase 33 (STK33), soluble adenylyl cyclase (sAC), cyclin-dependent kinase 2 (CDK2), and bromodomain testis associated (BRDT), each demonstrating nanomolar affinity and potential for reversible and specific inhibition of male fertility. This review also honors the contributions of Dr. David L. Garbers whose foundational work has paved the way for these advancements. The integration of genomic, proteomic, and chemical biology approaches, supported by interdisciplinary collaboration, is poised to transform male contraceptive development. Future perspectives emphasize the need for continued innovation and rigorous testing to bring these novel contraceptives from the laboratory to clinical application, promising a new era of male reproductive health management.


Assuntos
Anticoncepcionais Masculinos , Masculino , Animais , Humanos , Anticoncepcionais Masculinos/farmacologia , Espermatogênese/efeitos dos fármacos , Espermatogênese/genética , Reprodução/genética , Reprodução/efeitos dos fármacos , Camundongos , Genitália Masculina/metabolismo
4.
Ann Oncol ; 2024 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-39419289

RESUMO

BACKGROUND: Identification of biomarkers to optimize treatment strategies for early-stage triple-negative breast cancer (TNBC) is crucial. This study presents the development and validation of TNBC-DX, a novel test aimed at predicting both short- and long-term outcomes in early-stage TNBC. METHODS: Information from 1,259 patients with early-stage TNBC (SCAN-B, CALGB-40603, and BrighTNess) were used to establish the TNBC-DX scores. Independent validation of TNBC-DX was carried out in 3 studies: i) WSG-ADAPT-TN, ii) MMJ-CAR-2014-01, and iii) NeoPACT, including 527 patients with stage I-III TNBC undergoing neoadjuvant chemotherapy. In WSG-ADAPT-TN, patients were randomized to receive nab-paclitaxel plus gemcitabine or carboplatin. In MMJ-CAR-2014-01, patients received carboplatin plus docetaxel. In NeoPACT, patients received carboplatin plus docetaxel and pembrolizumab. The objective of this study was to evaluate the association between TNBC-DX and efficacy outcomes (pCR, distant disease-free survival [DDFS] or event-free survival [EFS], and overall survival [OS]) in the validation cohorts. RESULTS: TNBC-DX test was created incorporating 10-gene core immune gene module, 4-gene tumor cell proliferation signature, tumor size, and nodal staging. In the 2 independent validation cohorts without pembrolizumab, the TNBC-DX pCR score was significantly associated with pCR after adjustment for clinicopathological variables and treatment regimen (odds ratio per 10-units increment=1.34, 95% CI 1.20-1.52, p<0.001). pCR rates for the TNBC-DX pCR-high, -medium, and -low categories were 56.3%, 53.6%, and 22.5% respectively (odds ratio for pCR-high vs pCR-low=3.48 [95% CI 1.72-7.15], p<0.001). Additionally, the TNBC-DX risk score was significantly associated with DDFS (hazard ratio [HR] high-risk vs low-risk=0.24, 95% CI 0.15-0.41, p<0.001) and OS (HR=0.19, 95% CI 0.11-0.35, p<0.001). In the validation cohort with pembrolizumab, the TNBC-DX scores were significantly associated with pCR, EFS, and OS. CONCLUSIONS: TNBC-DX predicts pCR to neoadjuvant taxane-carboplatin in stage I-III TNBC and helps to forecast the patient´s long-term survival in the absence of neoadjuvant anthracycline/cyclophosphamide, and independent of pembrolizumab use.

5.
Neuroradiology ; 2024 Oct 23.
Artigo em Inglês | MEDLINE | ID: mdl-39441414

RESUMO

BACKGROUND: Malformations of cortical development (MCDs) in children with focal epilepsy pose significant diagnostic challenges, and a precise radiological diagnosis is crucial for surgical planning. New MRI sequences and the use of artificial intelligence (AI) algorithms are considered very promising in this regard, yet studies evaluating the relative contribution of each diagnostic technique are lacking. METHODS: The study was conducted using a dedicated "EPI-MCD MR protocol" with a 3 Tesla MRI scanner in patients with focal epilepsy and previously negative MRI. MRI sequences evaluated included 3D FLAIR, 3D T1 MPRAGE, T2 Turbo Spin Echo (TSE), 3D T1 MP2RAGE, and Arterial Spin Labelling (ASL). Two paediatric neuroradiologists scored each sequence for localisation and extension of the lesion. The MELD-FCD AI classifier's performance in identifying pathological findings was also assessed. We only included patients where a diagnosis of MCD was subsequently confirmed on histology and/or sEEG. RESULTS: The 3D FLAIR sequence showed the highest yield in detecting epileptogenic lesions, with 3D T1 MPRAGE, T2 TSE, and 3D T1 MP2RAGE sequences showing moderate to low yield. ASL was the least useful. The MELD-FCD classifier achieved a 69.2% true positive rate. In one case, MELD identified a subtle area of cortical dysplasia overlooked by the neuroradiologists, changing the management of the patient. CONCLUSIONS: The 3D FLAIR sequence is the most effective in the MRI-based diagnosis of subtle epileptogenic lesions, outperforming other sequences in localisation and extension. This pilot study emphasizes the importance of careful assessment of the value of additional sequences.

6.
Ann Oncol ; 2024 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-39442617

RESUMO

BACKGROUND: NATALEE assessed efficacy and tolerability of 3 years of adjuvant ribociclib plus NSAI compared with a nonsteroidal aromatase inhibitor (NSAI) alone in a broad population of patients with HR+/HER2- early breast cancer, including a select group without nodal involvement. This is the final preplanned analysis of invasive disease-free survival (iDFS). PATIENTS AND METHODS: Premenopausal/postmenopausal women and men were randomized 1:1 to ribociclib (n=2549; 400 mg/day, 3 weeks on/1 week off for 36 months) plus NSAI (letrozole 2.5 mg/day or anastrozole 1 mg/day for 60 months) or NSAI alone (n=2552). Men and premenopausal women also received goserelin (3.6 mg once every 28 days). Patients had anatomical stage IIA (N0 with additional risk factors or N1), IIB, or III disease. The primary endpoint was iDFS. Secondary efficacy endpoints were recurrence-free survival (RFS), distant DFS (DDFS), and overall survival (OS). This final iDFS analysis was planned after ≈500 events. RESULTS: At data cutoff (21 July 2023), ribociclib was stopped for 1996 patients (78.3%); 1091 (42.8%) completed 3 years of ribociclib, and ribociclib treatment was ongoing for 528 (20.7%). Median follow-up for iDFS was 33.3 months. Overall, 226 and 283 iDFS events occurred with ribociclib plus NSAI vs NSAI alone, respectively. Ribociclib plus NSAI demonstrated significant iDFS benefit over NSAI alone (Hazard Ratio 0.749, 95% Confidence Interval [CI] 0.628-0.892; P=0.0012). The 3-year iDFS rates were 90.7% (95% CI 89.3%-91.8%) vs 87.6% (95% CI 86.1%-88.9%). A consistent benefit was observed across prespecified subgroups, including stage (II/III) and nodal status (+/-). DDFS and RFS favored ribociclib plus NSAI. OS data were immature. No new safety signals were observed. CONCLUSIONS: With longer follow-up and most patients off ribociclib, NATALEE continues to demonstrate iDFS benefit with ribociclib plus NSAI over NSAI alone in the overall population and across key subgroups. Observed adverse events remained stable.

7.
Stroke ; 2024 Oct 02.
Artigo em Inglês | MEDLINE | ID: mdl-39355921

RESUMO

Randomized trials in stroke often focus on outcomes beyond a single clinical event. Trials of stroke prevention commonly use composite outcomes that include multiple components (eg, death, stroke, or myocardial infarction). A major limitation is that all events count equally but may differ markedly in terms of clinical severity. Trials in acute stroke often use ordinal outcomes or scale scores. Limitations include the requirement for statistical assumptions and the difficulty of handling the competing risk of death. We introduce the win ratio as an alternative method. It works by placing components of a composite into a hierarchy, whereby clinically more important outcomes take priority over less important ones. We illustrate how it works using data from 2 major stroke trials: the ICSS (International Carotid Stenting Study, a trial in stroke prevention) and the MR CLEAN (Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands). Potential benefits of the win ratio approach include the possibility to (1) emphasize the clinically most important outcomes, (2) combine components of different outcome types into a composite (eg, a mixture of time-to-event, continuous, and categorical), and (3) naturally handle the competing risk of death in analyses of quantitative outcomes. The win ratio will be used in the upcoming analysis of the ECST-2 (Second European Carotid Surgery Trial), which has a hierarchical primary outcome of (1) time to perioperative death, fatal stroke, or fatal myocardial infarction (most important); (2) time to nonfatal stroke; (3) time to nonfatal myocardial infarction (excluding silent infarcts); and (4) new silent cerebral infarct on brain imaging (least important). The win ratio provides a useful clinically relevant method for analyzing trial outcomes. It has some advantages over conventional methods, and we recommend its wider application in future stroke trials.

8.
Macromol Biosci ; : e2400327, 2024 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-39401270

RESUMO

Transfection efficiency is a critical parameter in gene therapy and molecular biology, representing the success rate at which nucleic acids are introduced and expressed in target cells. The combination of aptamers with nanotechnology-based delivery systems has demonstrated remarkable improvements in the transfection efficiency of therapeutic agents and holds significant potential for advancing gene therapy and the development of targeted treatments for various diseases, including cancer. In this work, cationic carbosilane dendritic systems are presented as an alternative to commercial transfection agents, demonstrating an increase in transfection efficiency when used for the internalization of apMNKQ2, an aptamer selected against a target in cancer. Their potential therapeutic use has been evaluated in breast cancer cell lines, MDA-MB-468 and MDA-MB-231, studying the cytotoxicity of the nanoconjugate, the internalization process, and its effect on cellular migration processes.

9.
bioRxiv ; 2024 Oct 18.
Artigo em Inglês | MEDLINE | ID: mdl-39463979

RESUMO

Understanding the neural signatures of consciousness and the mechanisms underlying its disorders, such as coma and unresponsive wakefulness syndrome, remains a critical challenge in neuroscience. In this study, we present a novel computational approach for the in silico discovery of neural correlates of consciousness, the mechanisms driving its disorders, and potential treatment strategies. Inspired by generative adversarial networks, which have driven recent advancements in generative artificial intelligence (AI), we trained deep neural networks to detect consciousness across multiple brain areas and species, including humans. These networks were then integrated with a genetic algorithm to optimize a brain-wide mean-field model of neural electrodynamics. The result is a realistic simulation of conscious brain states and disorders of consciousness (DOC), which not only recapitulates known mechanisms of unconsciousness but also predicts novel causes expected to lead to these conditions. Beyond simulating DOC, our model provides a platform for exploring therapeutic interventions, specifically deep brain stimulation (DBS), which has shown promise in improving levels of awareness in DOC in over five decades of study. We systematically applied simulated DBS to various brain regions at a wide range of frequencies to identify an optimal paradigm for reigniting consciousness in this cohort. Our findings suggest that in addition to previously studied thalamic and pallidal stimulation, high-frequency stimulation of the subthalamic nucleus, a relatively underexplored target in DOC, may hold significant promise for restoring consciousness in this set of disorders.

10.
Actas Dermosifiliogr ; 2024 Oct 23.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-39454868

RESUMO

BACKGROUND AND OBJECTIVE: risankizumab-a humanized monoclonal antibody that targets the p19 subunit of IL-23-has been recently approved to treat moderate-to-severe plaque psoriasis. Real-world data based on a representative pool of patients are currently lacking. Objective To assess the mid- and long-term safety and efficacy profile of risankizumab in patients with moderate-to-severe psoriasis in the routine clinical practice. METHODS: This was a retrospective and multicenter study of consecutive psoriatic patients on risankizumab from April 2020 through November 2022. The primary endpoint was the number of patients who achieved a 100% improvement in their Psoriasis Area and Severity Index (PASI) (PASI100) on week 52. RESULTS: A total of 510 patients, 198 (38.8%) women and 312 (61.2%) men were included in the study. The mean age was 51.7 ± 14.4 years. A total of 227 (44.5%) study participants were obese (body mass index [BMI] > 30kg/m2). The mean baseline PASI score was 11.4 ± 7.2, and the rate of patients who achieved PASI100 on week 52, 67.0%. Throughout the study follow-up, 21%, 50.0%, 59.0%, and 66% of the patients achieved PASI100 on weeks 4, 16, 24, and 40, respectively. The number of patients who achieved a PASI ≤ 2 was greater in the group with a BMI ≤ 30 kg/m2 on weeks 4 (P = .04), 16 (P = .001), and 52 (P = .002). A statistically significantly greater number of patients achieved PASI100 in the treatment-naïve group on weeks 16 and 52 (P = .001 each, respectively). On week 16 a significantly lower number of participants achieved PASI100 in the group with psoriatic arthropathy (P = .04). Among the overall study sample, 22 (4.3%) patients reported some type of adverse event and 20 (3.9%) discontinued treatment. CONCLUSIONS: Risankizumab proved to be a safe and effective therapy for patients with moderate-to-severe psoriasis in the routine clinical practice.

11.
J Control Release ; 376: 429-440, 2024 Oct 22.
Artigo em Inglês | MEDLINE | ID: mdl-39427778

RESUMO

Endometriosis, defined by the growth of endometrial tissues outside of the uterine cavity, is a global health burden for ∼200 million women. Patients with endometriosis usually present with chronic pain and are often diagnosed with infertility. The pathogenesis of endometriosis is still an open question; however, tissue stemness and immunological and genetic factors have been extensively discussed in the establishment of endometriotic lesions. Current treatments for endometriosis can be categorized into pharmacological management of hormone levels and surgical removal of the lesions. Both approaches have limited efficacy, with recurrences often encountered; thus, there is no complete cure for the disease or its symptoms. We review the current knowledge of the etiology of endometriosis and summarize the advancement of pharmacological management of endometriosis. We also discuss our efforts in applying DNA-encoded chemistry technology (DEC-Tec) to identify bioactive molecules for the treatment of endometriosis, offering new avenues for developing non-hormonal treatment options for those patients who seek spontaneous pregnancies.

12.
Rev Neurol ; 79(8): 217-221, 2024 Oct 16.
Artigo em Espanhol | MEDLINE | ID: mdl-39404035

RESUMO

INTRODUCTION: Multiple factors can cause sleep disturbances in Parkinson's disease. The quality of sleep and therefore of life is usually improved with continuous dopaminergic stimulation therapies, such as continuous subcutaneous infusion of apomorphine. PATIENTS AND METHODS: We present an observational retrospective study of patients at our centre with advanced Parkinson's disease, treated with continuous infusion of apomorphine, with treatment extended to nights, between 2011 and 2022. We collected data from 37 patients, and evaluated the indication for nocturnal treatment, efficacy, safety and reasons for withdrawal. RESULTS: Fifty percent of patients began nocturnal treatment for motor complications, 19% for non-motor complications and 31% for both. The most common non-motor symptoms were sleep fragmentation and disturbances, neuropathic pain, psychiatric symptoms and intense nocturia. Twenty of the 37 patients (54%) were continuing treatment at the end of the study follow-up, 16 (43%) discontinued the infusion, and one (3%) was lost to follow-up. The adverse reactions that led to termination of the infusion were severe nodules (two), dopaminergic psychosis (one) and a positive Coombs test with/without anaemia (one). Four patients terminated the nocturnal infusions while continuing the daytime infusions due to suboptimal adaptation to the device. Patients whose symptoms improved without any significant adverse effects continued the treatment. CONCLUSIONS: Continuous infusion of apomorphine during the night was an effective and safe treatment in our series.


TITLE: Uso de infusión subcutánea continua nocturna de apomorfina en la enfermedad de Parkinson avanzada: una serie de 37 casos.Introducción. Existen múltiples factores que pueden causar alteraciones del sueño en la enfermedad de Parkinson. La calidad del sueño y, por ende, de vida suele mejorar con terapias de estimulación dopaminérgica continua, como la infusión subcutánea continua de apomorfina. Pacientes y métodos. Presentamos un estudio observacional, retrospectivo, en pacientes con enfermedad de Parkinson avanzada tratados con infusión continua de apomorfina a los que se extendió el tratamiento al período nocturno en nuestro centro desde 2011 hasta 2022. Recopilamos datos de 37 pacientes en los que evaluamos la indicación de uso nocturno, eficacia, seguridad y motivos de retirada. Resultados. El 50% de los pacientes inició el tratamiento nocturno por complicaciones motoras, el 19% por complicaciones no motoras y el 31% por ambas. Los síntomas no motores más comunes fueron: fragmentación y alteraciones del sueño, dolor neuropático, síntomas psiquiátricos y nicturia intensa. De los 37 pacientes, 20 (54%) continuaban con el tratamiento al final del seguimiento del estudio, 16 (43%) discontinuaron la infusión y se perdió el seguimiento de uno (3%). Las reacciones adversas que llevaron a finalizar la infusión fueron: nódulos graves (dos), psicosis dopaminérgica (uno) y Coombs + con/sin anemia (uno). Cuatro pacientes finalizaron la infusión nocturna manteniendo la infusión diurna por adaptación subóptima al dispositivo. Continuaron el tratamiento los pacientes que presentaron mejoría sintomática sin efectos adversos significativos. Conclusiones. La apomorfina en infusión continua durante el período nocturno fue un tratamiento eficaz y seguro en nuestra serie.


Assuntos
Antiparkinsonianos , Apomorfina , Infusões Subcutâneas , Doença de Parkinson , Humanos , Apomorfina/administração & dosagem , Apomorfina/efeitos adversos , Apomorfina/uso terapêutico , Doença de Parkinson/tratamento farmacológico , Doença de Parkinson/complicações , Estudos Retrospectivos , Masculino , Feminino , Idoso , Pessoa de Meia-Idade , Antiparkinsonianos/administração & dosagem , Antiparkinsonianos/uso terapêutico , Antiparkinsonianos/efeitos adversos , Agonistas de Dopamina/administração & dosagem , Agonistas de Dopamina/efeitos adversos , Agonistas de Dopamina/uso terapêutico , Idoso de 80 Anos ou mais
13.
Science ; 386(6719): 335-340, 2024 Oct 18.
Artigo em Inglês | MEDLINE | ID: mdl-39418379

RESUMO

Human land-use intensification threatens arthropod (for example, insect and spider) biodiversity across aquatic and terrestrial ecosystems. Insects and spiders play critical roles in ecosystems by accumulating and synthesizing organic nutrients such as polyunsaturated fatty acids (PUFAs). However, links between biodiversity and nutrient content of insect and spider communities have yet to be quantified. We relate insect and spider richness to biomass and PUFA-mass from stream and terrestrial communities encompassing nine land uses. PUFA-mass and biomass relate positively to biodiversity across ecosystems. In terrestrial systems, human-dominated areas have lower biomass and PUFA-mass than more natural areas, even at equivalent levels of richness. Aquatic ecosystems have consistently higher PUFA-mass than terrestrial ecosystems. Our findings reinforce the importance of conserving biodiversity and highlight the distinctive benefits of aquatic biodiversity.


Assuntos
Biodiversidade , Conservação dos Recursos Naturais , Ácidos Graxos Insaturados , Insetos , Nutrientes , Aranhas , Animais , Insetos/metabolismo , Nutrientes/análise , Nutrientes/metabolismo , Aranhas/metabolismo , Ácidos Graxos Insaturados/metabolismo
14.
bioRxiv ; 2024 Sep 21.
Artigo em Inglês | MEDLINE | ID: mdl-39345535

RESUMO

Cancer cachexia affects up to 80% of cancer patients and results in reduced quality of life and survival. We previously demonstrated that the transcriptional repressor Forkhead box P1 (FoxP1) is upregulated in skeletal muscle of cachectic mice and people with cancer, and when overexpressed in skeletal muscle is sufficient to induce pathological features characteristic of cachexia. However, the role of myofiber-derived FoxP1 in both normal muscle physiology and cancer-induced muscle wasting remains largely unexplored. To address this gap, we generated a conditional mouse line with myofiber-specific ablation of FoxP1 (FoxP1SkmKO) and found that in cancer-free mice, deletion of FoxP1 in skeletal myofibers resulted in increased myofiber size in both males and females, with a significant increase in muscle mass in males. In response to murine KPC pancreatic tumor burden, we found that myofiber-derived FoxP1 is required for cancer-induced muscle wasting and diaphragm muscle weakness in male mice. In summary, our findings identify myofiber-specific FoxP1 as a negative regulator of skeletal muscle with sex-specific differences in the context of cancer.

15.
Microorganisms ; 12(9)2024 Sep 14.
Artigo em Inglês | MEDLINE | ID: mdl-39338567

RESUMO

Anaplasmataceae bacteria are emerging infectious agents transmitted by ticks. The aim of this study was to identify the molecular diversity of this bacterial family in ticks and hosts, both domestic and wild, as well as blood meal sources of free-living ticks in northeastern Paraguay. The bacteria were identified using PCR-HRM, a method optimized for this purpose, while the identification of ticks and their blood meal was performed using conventional PCR. All amplified products were subsequently sequenced. The bacteria detected in the blood hosts included Ehrlichia canis, Anaplasma platys, and Anaplasma phagocytophilum, Candidatus Anaplasma boleense, and Wolbachia spp., which had not been previously reported in the country. Free-living and parasitic ticks on dogs (Canis lupus familiaris) and wild armadillos (Dasypus novemcinctus) were collected and identified as Rhipicephalus sanguineus and Amblyomma spp. The species E. canis, A. platys, A. phagocytophilum, and Ca. A. boleense were detected in domestic dog ticks, and E. canis and A. platys were found for the first time in armadillos and free-living ticks. Blood feeding sources detected in free-living ticks were rodents, humans, armadillos and dogs. Results show a high diversity of tick-borne pathogens circulating among domestic and wild animals in the northeastern region of Paraguay.

16.
Nat Immunol ; 25(10): 1884-1899, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-39327500

RESUMO

TCF1high progenitor CD8+ T cells mediate the efficacy of immunotherapy; however, the mechanisms that govern their generation and maintenance are poorly understood. Here, we show that targeting glycolysis through deletion of pyruvate kinase muscle 2 (PKM2) results in elevated pentose phosphate pathway (PPP) activity, leading to enrichment of a TCF1high progenitor-exhausted-like phenotype and increased responsiveness to PD-1 blockade in vivo. PKM2KO CD8+ T cells showed reduced glycolytic flux, accumulation of glycolytic intermediates and PPP metabolites and increased PPP cycling as determined by 1,2-13C glucose carbon tracing. Small molecule agonism of the PPP without acute glycolytic impairment skewed CD8+ T cells toward a TCF1high population, generated a unique transcriptional landscape and adoptive transfer of agonist-treated CD8+ T cells enhanced tumor control in mice in combination with PD-1 blockade and promoted tumor killing in patient-derived tumor organoids. Our study demonstrates a new metabolic reprogramming that contributes to a progenitor-like T cell state promoting immunotherapy efficacy.


Assuntos
Linfócitos T CD8-Positivos , Fator 1-alfa Nuclear de Hepatócito , Imunoterapia , Via de Pentose Fosfato , Proteínas de Ligação a Hormônio da Tireoide , Animais , Linfócitos T CD8-Positivos/imunologia , Linfócitos T CD8-Positivos/metabolismo , Camundongos , Fator 1-alfa Nuclear de Hepatócito/metabolismo , Humanos , Imunoterapia/métodos , Glicólise , Proteínas de Membrana/metabolismo , Proteínas de Membrana/genética , Camundongos Knockout , Hormônios Tireóideos/metabolismo , Receptor de Morte Celular Programada 1/metabolismo , Inibidores de Checkpoint Imunológico/farmacologia , Camundongos Endogâmicos C57BL , Neoplasias/imunologia , Neoplasias/terapia , Neoplasias/metabolismo , Piruvato Quinase
17.
Front Sports Act Living ; 6: 1228440, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39220604

RESUMO

Dating back to when the inventor of the game, James Naismith, developed a mentoring relationship with John McClendon one of the African American pioneers in basketball (founder of the "fast-break"), there are countless examples of these intersections. Entering the college basketball culture as the most decorated recruiting class in National Collegiate Athletic Association basketball history, the University of Michigan Fab Five's legacy catalyzes a new era of American basketball culture. Gracefully talented, the Fab Five abruptly disrupted the institution of basketball, the National Collegiate Athletic Association, and the identity of basketball athletes globally. This paper presents a sociocultural exploration of the residual impact of the Fab Five's legacy. As authentic, confident, and culturally competent, the five young men intentionally resisted and acknowledged the intersections of race, culture, and class within the college basketball culture. We critically assess the evolution of basketball culture, grounded by the sociocultural experiences of the Fab Five, imprinting upon contemporary generations of college basketball programs and their player. Through these experiences, the Fab Five's success through conflict, during their short stint in college basketball and beyond their professional careers trailblazed a path for the modern-day basketball athlete. Known for their style of play, their expression of fashion on and off the court, and eagerness to talk smack, the Fab Five backed up their talk with performance. Their performance on and off the court, revolutionized the culture of basketball; Even more, American society. The Fab Five's legacy is the cultural catalyst for basketball culture on all levels.

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