Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 357
Filtrar
Mais filtros

Base de dados
Tipo de documento
Intervalo de ano de publicação
1.
Lancet ; 403(10434): 1351-1361, 2024 Apr 06.
Artigo em Inglês | MEDLINE | ID: mdl-38490230

RESUMO

BACKGROUND: The current standard of care of screening and referring patients for treatment for symptoms, such as depression, pain, and fatigue, is not effective. This trial aimed to test the efficacy of an integrated screening and novel stepped collaborative care intervention versus standard of care for patients with cancer and at least one of the following symptoms: depression, pain, or fatigue. METHODS: This randomised, parallel, phase 3 trial was conducted in 29 oncology outpatient clinics associated with the UPMC Hillman Cancer Center in the USA. Patients (aged ≥21 years) with any cancer type and clinical levels of depression, pain, or fatigue (or all of these) were eligible. Eligible family caregivers were aged 21 years or older and providing care to a patient diagnosed with cancer who consented for this study. Patients were randomly assigned (1:1) to stepped collaborative care or standard of care using a central, permuted block design (sizes of 2, 4, and 6) stratified by sex and prognostic status. The biostatistician, oncologists, and outcome assessors were masked to treatment assignment. Stepped collaborative care was once-weekly cognitive behavioural therapy for 50-60 min from a care coordinator via telemedicine (eg, telephone or videoconferencing). Pharmacotherapy for symptoms might be initiated or changed if recommended by the treatment team or preferred by the patient. Standard of care was screening and referral to a health-care provider for treatment of symptoms. The primary outcome was health-related quality of life in patients at 6 months. Maintenance of the treatment benefits was assessed at 12 months. Participants included in the primary analysis were per intention to treat, which included patients missing one or both follow-up assessments. This trial was registered with ClinicalTrials.gov (NCT02939755). FINDINGS: Between Dec 5, 2016, and April 8, 2021, 459 patients and 190 family caregivers were enrolled. 222 patients were assigned to standard of care and 237 to stepped collaborative care. Of 459 patients, 201 (44%) were male and 258 (56%) were female. Patients in the stepped collaborative care group had a greater 0-6-month improvement in health-related quality of life than patients in the standard-of-care group (p=0·013, effect size 0·09). Health-related quality of life was maintained for the stepped collaborative care group (p=0·74, effect size 0·01). Patients in the stepped collaborative care group had greater 0-6-month improvements than the standard-of-care group in emotional (p=0·012), functional (p=0·042), and physical (p=0·033) wellbeing. No adverse events were reported by patients in either group and deaths were considered unrelated to the study. INTERPRETATION: An integrated screening and novel stepped collaborative care intervention, compared with the current standard of care, is recommended to improve health-related quality of life. The findings of this study will advance the implementation of guideline concordant care (screening and treatment) and has the potential to shift the practice of screening and treatment paradigm nationwide, improving outcomes for patients diagnosed with cancer. FUNDING: US National Cancer Institute.


Assuntos
Cuidadores , Neoplasias , Feminino , Humanos , Masculino , Fadiga , Neoplasias/diagnóstico , Neoplasias/terapia , Dor , Qualidade de Vida , Resultado do Tratamento , Adulto Jovem , Adulto
2.
J Biol Chem ; 299(12): 105438, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37944618

RESUMO

The tachykinin receptors neurokinin 1 (NK1R) and neurokinin 2 (NK2R) are G protein-coupled receptors that bind preferentially to the natural peptide ligands substance P and neurokinin A, respectively, and have been targets for drug development. Despite sharing a common C-terminal sequence of Phe-X-Gly-Leu-Met-NH2 that helps direct biological function, the peptide ligands exhibit some degree of cross-reactivity toward each other's non-natural receptor. Here, we investigate the detailed structure-activity relationships of the ligand-bound receptor complexes that underlie both potent activation by the natural ligand and cross-reactivity. We find that the specificity and cross-reactivity of the peptide ligands can be explained by the interactions between the amino acids preceding the FxGLM consensus motif of the bound peptide ligand and two regions of the receptor: the ß-hairpin of the extracellular loop 2 (ECL2) and a N-terminal segment leading into transmembrane helix 1. Positively charged sidechains of the ECL2 (R177 of NK1R and K180 of NK2R) are seen to play a vital role in the interaction. The N-terminal positions 1 to 3 of the peptide ligand are entirely dispensable. Mutated and chimeric receptor and ligand constructs neatly swap around ligand specificity as expected, validating the structure-activity hypotheses presented. These findings will help in developing improved agonists or antagonists for NK1R and NK2R.


Assuntos
Receptores da Neurocinina-1 , Taquicininas , Animais , Humanos , Linhagem Celular , Chlorocebus aethiops , Ligantes , Neurocinina A/metabolismo , Antagonistas dos Receptores de Neurocinina-1 , Receptores da Neurocinina-1/agonistas , Receptores da Neurocinina-1/metabolismo , Substância P , Taquicininas/metabolismo , Receptores da Neurocinina-2/metabolismo
3.
Cancer Immunol Immunother ; 73(3): 44, 2024 Feb 13.
Artigo em Inglês | MEDLINE | ID: mdl-38349570

RESUMO

Combining immunotherapies with distinct mechanisms of action has the potential to overcome treatment resistance and improve outcomes. The inducible T-cell co-stimulator (ICOS) agonist feladilimab is directed at enhancing T-cell activation and function, thereby promoting an antitumor response. INDUCE-2 (NCT03693612) was a Phase I/II, open-label, two-part study evaluating the anti-ICOS agonist feladilimab in combination with the anti-CTLA-4 antibody tremelimumab in patients with select advanced solid tumors. Objectives of Part 1 were to determine the safety, tolerability, and recommended phase 2 dose (RP2D) of feladilimab in combination with tremelimumab. In Part 2, the antitumor activity of the combination (administered at the RP2D determined in Part 1) was to be assessed in patients with relapsed/refractory head and neck squamous cell carcinoma. Primary endpoints included the rates of dose-limiting toxicities (DLTs), adverse events (AEs), AEs of special interest, and serious AEs. Secondary endpoints included overall response rate, while biomarker assessment was exploratory. A total of 26 patients were enrolled, 18 (69%) of whom had completed the study at end date. One patient, in the highest dose group (24/225 mg feladilimab/tremelimumab), experienced a DLT 18 days after the first dose of study treatment. All patients experienced at least one AE; AEs led to treatment discontinuation in four (15%) patients. Partial response was observed in one patient. Feladilimab in combination with tremelimumab was well-tolerated but showed limited efficacy. Based on the totality of data from Part 1, it was decided not to continue with Part 2.


Assuntos
Anticorpos Monoclonais Humanizados , Neoplasias de Cabeça e Pescoço , Humanos , Anticorpos Monoclonais Humanizados/uso terapêutico , Anticorpos Monoclonais/uso terapêutico , Imunoterapia
4.
J Pers ; 2024 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-38606602

RESUMO

OBJECTIVE: This study explores how middle-aged Black Americans talk about race, without prompting, while telling their life stories. METHOD: Drawing upon a dataset of lengthy Life Story Interviews (N = 70), we first employed a keyword search to identify race-relevant interview scenes for each participant. Next, we conducted a thematic analysis of these scenes to identify salient racial narrative themes. Finally, we coded race-relevant scenes to examine the psychological correlates of racial narrative themes. RESULTS: We identified 460 total racially themed Life Story Interview scenes, with the number of racially themed scenes ranging from 1 to 17 across participants' interviews. Racial narrative themes included Community of Care, Black Cultural Identity, Multiculturalism, Activism, Encounter with Racism, Systemic Racism, and Racial Reckoning. Quantitative analyses highlight a relationship between racial narrative themes and psychological measures of wisdom and generativity. CONCLUSION: This study offers insight into the ways that race manifests in the life stories of Black Americans and highlights the importance of considering race in the study of narrative identity, and personality, more broadly.

5.
Clin Otolaryngol ; 2024 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-39175141

RESUMO

INTRODUCTION: We retrospectively studied young patients with head and neck squamous cell carcinoma (HNSCC) to identify factors associated with disease-specific survival (DSS). METHODS: Patient and tumor characteristics of patients aged ≤45 who received treatments for non-metastatic HNSCC were collected to identify factors associated with DSS. Proportional hazards regression was applied separately for surgical and non-surgical patients. RESULTS: 230 patients were included. Surgical and non-surgical patients had similar DSS. Higher pathologic stages, positive margins, perineural invasion (PNI), extranodal extension and negative HPV status were associated with worse DSS for surgical patients and negative HPV status for non-surgical patients. In the multivariate analysis, pathologic stages, positive margins, and PNI were associated with worse DSS in surgical patients. CONCLUSION: Pathologic stages, positive margins, and PNI are independently associated with worse DSS in young surgical HNSCC patients. PNI is a uniquely strong prognostic factor for young patients.

6.
Histopathology ; 82(4): 608-621, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36416305

RESUMO

AIMS: Primary head/neck mucosal melanomas (MMs) are rare and exhibit aggressive biologic behaviour and elevated mutational loads. The molecular mechanisms responsible for high genomic instability observed in head/neck MMs remain elusive. The DNA cytosine deaminase APOBEC3B (A3B) constitutes a major endogenous source of mutation in human cancer. A3B-related mutations are identified through C-to-T/-G base substitutions in 5'-TCA/T motifs. Herein, we present immunohistochemical and genomic data supportive of a role for A3B in head/neck MMs. METHODS AND RESULTS: A3B protein levels were assessed in oral (n = 13) and sinonasal (n = 13) melanomas, and oral melanocytic nevi (n = 13) by immunohistochemistry using a custom rabbit α-A3B mAb (5210-87-13). Heterogeneous, selective-to-diffuse, nuclear only, A3B immunopositivity was observed in 12 of 13 (92.3%) oral melanomas (H-score range = 9-72, median = 40) and 8 of 13 (62%) sinonasal melanomas (H-score range = 1-110, median = 24). Two cases negative for A3B showed prominent cytoplasmic staining consistent with A3G. A3B protein levels were significantly higher in oral and sinonasal MMs than intraoral melanocytic nevi (P < 0.0001 and P = 0.0022, respectively), which were A3B-negative (H-score range = 1-8, median = 4). A3B levels, however, did not differ significantly between oral and sinonasal tumours (P > 0.99). NGS performed in 10 sinonasal MMs revealed missense NRAS mutations in 50% of the studied cases and one each KIT and HRAS mutations. Publicly available whole-genome sequencing (WGS) data disclosed that the number of C-to-T mutations and APOBEC3 enrichment score were markedly elevated in head/neck MMs (n = 2). CONCLUSION: The above data strongly indicate a possible role for the mutagenic enzyme A3B in head/neck melanomagenesis, but not benign melanocytic neoplasms.


Assuntos
Melanoma , Neoplasias Bucais , Nevo Pigmentado , Neoplasias dos Seios Paranasais , Animais , Humanos , Coelhos , Melanoma/patologia , Mutação , Antígenos de Histocompatibilidade Menor/genética , Antígenos de Histocompatibilidade Menor/metabolismo , Citidina Desaminase/genética
7.
J Pers ; 91(1): 247-261, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-35678282

RESUMO

OBJECTIVE: In the first 100 days of his U.S. presidency, Joe Biden sought to comfort Americans who had lost loved ones to the pandemic and to initiate a surprisingly progressive policy agenda. I interpret these two cardinal features of his early presidency in terms of two traumatic losses in Biden's personal life, contextualizing the argument within a 3-tiered model of personality. METHOD: This psychobiography of a single case mainly follows an inductive, grounded-theory approach that aims to find patterns in the data that both explain a life and link to evidence-based constructs in psychological science. RESULTS: As Biden understands his own life story, the deaths of his wife and daughter in 1972 and first-born adult son in 2015 forged an empathic sensibility that enables him to connect deeply with other Americans through shared grief and pain. These two traumatic events also inform the uniquely conciliatory approach he followed to instigate social change. CONCLUSIONS: The first 100 days of the Biden presidency provide a striking example of how a particular person's life history comes to meet the broader historical moment. The findings have implications for how personality researchers think about redemptive life stories and the nature of late-life narrative identity.


Assuntos
Narração , Cônjuges , Masculino , Adulto , Humanos , Estados Unidos , Política
8.
J Pers ; 2023 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-36648361

RESUMO

OBJECTIVE: We aim to identify the major ideas and trends in the study of morality within personality psychology over the past 100 years. METHOD: Our historical review is organized into three sections, examining moral dimensions in personality from the standpoints of the person as (1) a social actor (moral traits), (2) a motivated agent (the mental infrastructure of morality), and (3) an autobiographical author (moral life stories). RESULTS: Within the field of personality psychology, a great deal of research into morality has been hiding for decades in plain view. Accordingly, we trace the history of research on socialization and instrumental competence, altruism, moral traits and virtues, the dimensions of morality inherent in the authoritarian personality, personal values, moral reasoning, moral intuitions, and the life stories constructed by people who have distinguished themselves for moral excellence, as evidenced in extraordinary bravery, compassion, or generativity. CONCLUSIONS: In a multitude of ways, human beings express and experience individual differences in their moral engagement of the world, all of which fall within the purview of personality psychology.

9.
Ann Intern Med ; 175(6): 873-878, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35500257

RESUMO

BACKGROUND: The percentage of U.S. physicians who identify as being from an underrepresented racial or ethnic group remains low relative to their proportion in the U.S. population. How this percentage may have been affected by state bans on affirmative action in public postsecondary institutions has received relatively little attention. OBJECTIVE: To examine the association between state affirmative action bans and percentage of enrollment in U.S. public medical schools from underrepresented racial and ethnic groups. DESIGN: Event study comparing public medical schools in states that implemented affirmative action bans with those in states without bans. SETTING: U.S. public medical schools. PARTICIPANTS: 21 public medical schools in 8 states with affirmative action bans matched to 32 public medical schools in 24 states without bans from 1985 to 2019. MEASUREMENTS: Percentage of total enrollment from racial and ethnic groups underrepresented in medicine (Black, Hispanic, American Indian or Alaska Native, and Native Hawaiian or other Pacific Islander). RESULTS: The percentage of enrollment from underrepresented racial and ethnic groups was 14.8% in U.S. public medical schools in the year before ban implementation in states with bans. The adjusted percentage of underrepresented students in ban schools decreased by 4.8 percentage points (95% CI, -6.3 to -3.2 percentage points) 5 years after ban implementation relative to the year before implementation, whereas the adjusted percentage in control schools increased by 0.7 percentage point (CI, -0.1 to 1.6 percentage points), for a relative difference, or difference-in-differences estimate, of -5.5 percentage points (CI, -7.1 to -3.9 percentage points). LIMITATION: Inability to account for the effect of these bans on undergraduate enrollment. CONCLUSION: State affirmative action bans were associated with significant reductions in the percentage of students in U.S. public medical schools from underrepresented racial and ethnic groups. PRIMARY FUNDING SOURCE: None.


Assuntos
Etnicidade , Faculdades de Medicina , Humanos , Grupos Minoritários/educação , Política Pública , Estudantes , Estados Unidos
10.
J Neurosci ; 41(32): 6946-6953, 2021 08 11.
Artigo em Inglês | MEDLINE | ID: mdl-34230105

RESUMO

Motivational deficits characterized by an unwillingness to overcome effortful costs are a common feature of neuropsychiatric and neurologic disorders that are insufficiently understood and treated. Dopamine (DA) signaling in the nucleus accumbens (NAc) facilitates goal-seeking, but how NAc DA release encodes motivationally salient stimuli to influence effortful investment is not clear. Using fast-scan cyclic voltammetry in male and female mice, we find that NAc DA release diametrically responds to cues signaling increasing cost of reward, while DA release to the reward itself is unaffected by its cost. Because endocannabinoid (eCB) signaling facilitates goal seeking and NAc DA release, we further investigated whether repeated augmentation of the eCB 2-arachidonoylglycerol with a low dose of a monoacylglycerol lipase (MAGL) inhibitor facilitates motivation and DA signaling without the development of tolerance. We find that chronic MAGL treatment stably facilitates goal seeking and DA encoding of prior reward cost, providing critical insight into the neurobiological mechanisms of a viable treatment for motivational deficits.SIGNIFICANCE STATEMENT Decades of work has established a fundamental role for dopamine neurotransmission in motivated behavior and cue-reward learning, but how dopaminergic encoding of cues associates with motivated action has remained unclear. Specifically, how dopamine neurons signal future and prior reward cost, and whether this can be modified to influence motivational set points is not known. The current study provides important insight into how dopamine neurons encode motivationally relevant stimuli to influence goal-directed action and supports cannabinoid-based therapies for treatment of motivational disorders.


Assuntos
Neurônios Dopaminérgicos/fisiologia , Endocanabinoides/metabolismo , Motivação/fisiologia , Núcleo Accumbens/fisiologia , Recompensa , Animais , Sinais (Psicologia) , Dopamina , Neurônios Dopaminérgicos/efeitos dos fármacos , Feminino , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Monoacilglicerol Lipases/farmacologia , Motivação/efeitos dos fármacos , Núcleo Accumbens/efeitos dos fármacos
11.
Psychooncology ; 31(6): 1003-1012, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35083809

RESUMO

BACKGROUND: The objectives of this study were to examine benefits and consequences of the COVID-19 pandemic for patients diagnosed with cancer and their family caregivers. METHODS: A 23-item questionnaire assessing COVID-19-related issues, the Patient Health Questionnaire-2, Generalized Anxiety Disorder-2, Pittsburgh Sleep Quality Index, and the Perceived Stress Scale (PSS)-4 were administered to patients diagnosed with cancer and their family caregivers. RESULTS: Of the 161 patients and 78 caregivers who participated, 38.1% and 32.8 were male, 95% and 84.6% Caucasian, and the mean age was 66 and 64.6 years, respectively. A total of 16.5% and 15.2% reported depressive symptoms, 18.4% and 19% reported anxiety; 35.5% and 26.6% reported poor sleep quality, and 66% and 63.3% scored one standard deviation above the norms for the PSS, respectively. Predictors of poorer patient- and caregiver-reported outcomes included greater loneliness, worry about self or family being infected by the COVID-19, and worsening relationships with family. The fear of COVID-19 led to 20.8% of patients and 24.4% of family caregivers cancelling medical appointments, procedures, and treatments. A total of 52.5% of patients and 53.2% caregivers reported that the pandemic led to benefit finding but these changes were not associated with any of the measured patient- or caregiver-related outcomes. CONCLUSIONS: Psychological functioning for patients and caregivers was similar to that of pre-pandemic levels, however the decrease in health care utilization secondary to fear of COVID-19 was notable. While there were many negative effects of the pandemic, the majority of patients and caregivers reported some benefit to the pandemic.


Assuntos
COVID-19 , Neoplasias , Ansiedade/epidemiologia , Ansiedade/psicologia , COVID-19/epidemiologia , Cuidadores/psicologia , Estudos Transversais , Depressão/epidemiologia , Depressão/psicologia , Feminino , Humanos , Masculino , Neoplasias/terapia , Pandemias , SARS-CoV-2
12.
Mol Cell ; 56(1): 140-52, 2014 Oct 02.
Artigo em Inglês | MEDLINE | ID: mdl-25240402

RESUMO

Nanog facilitates embryonic stem cell self-renewal and induced pluripotent stem cell generation during the final stage of reprogramming. From a genome-wide small interfering RNA screen using a Nanog-GFP reporter line, we discovered opposing effects of Snai1 and Snai2 depletion on Nanog promoter activity. We further discovered mutually repressive expression profiles and opposing functions of Snai1 and Snai2 during Nanog-driven reprogramming. We found that Snai1, but not Snai2, is both a transcriptional target and protein partner of Nanog in reprogramming. Ectopic expression of Snai1 or depletion of Snai2 greatly facilitates Nanog-driven reprogramming. Snai1 (but not Snai2) and Nanog cobind to and transcriptionally activate pluripotency-associated genes including Lin28 and miR-290-295. Ectopic expression of miR-290-295 cluster genes partially rescues reprogramming inefficiency caused by Snai1 depletion. Our study thus uncovers the interplay between Nanog and mesenchymal factors Snai1 and Snai2 in the transcriptional regulation of pluripotency-associated genes and miRNAs during the Nanog-driven reprogramming process.


Assuntos
Proteínas de Homeodomínio/fisiologia , Fatores de Transcrição/fisiologia , Animais , Sítios de Ligação , Diferenciação Celular/genética , Linhagem Celular , Regulação da Expressão Gênica , Células HEK293 , Proteínas de Homeodomínio/genética , Proteínas de Homeodomínio/metabolismo , Humanos , Células-Tronco Pluripotentes Induzidas , Camundongos , Proteína Homeobox Nanog , Regiões Promotoras Genéticas , Interferência de RNA , Fatores de Transcrição da Família Snail , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo
13.
Hum Mol Genet ; 28(19): 3232-3243, 2019 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-31261377

RESUMO

This study utilized human fibroblasts as a preclinical discovery and diagnostic platform for identification of cell biological signatures specific for the LRRK2 G2019S mutation producing Parkinson's disease (PD). Using live cell imaging with a pH-sensitive Rosella biosensor probe reflecting lysosomal breakdown of mitochondria, mitophagy rates were found to be decreased in fibroblasts carrying the LRRK2 G2019S mutation compared to cells isolated from healthy subject (HS) controls. The mutant LRRK2 increased kinase activity was reduced by pharmacological inhibition and targeted antisense oligonucleotide treatment, which normalized mitophagy rates in the G2019S cells and also increased mitophagy levels in HS cells. Detailed mechanistic analysis showed a reduction of mature autophagosomes in LRRK2 G2019S fibroblasts, which was rescued by LRRK2 specific kinase inhibition. These findings demonstrate an important role for LRRK2 protein in regulation of mitochondrial clearance by the lysosomes, which is hampered in PD with the G2019S mutation. The current results are relevant for cell phenotypic diagnostic approaches and potentially for stratification of PD patients for targeted therapy.


Assuntos
Autofagossomos/metabolismo , Serina-Treonina Proteína Quinase-2 com Repetições Ricas em Leucina/genética , Serina-Treonina Proteína Quinase-2 com Repetições Ricas em Leucina/metabolismo , Mutação , Doença de Parkinson/genética , Adulto , Idoso , Autofagossomos/efeitos dos fármacos , Feminino , Fibroblastos/metabolismo , Regulação da Expressão Gênica , Humanos , Serina-Treonina Proteína Quinase-2 com Repetições Ricas em Leucina/antagonistas & inibidores , Masculino , Pessoa de Meia-Idade , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Oligonucleotídeos Antissenso/farmacologia , Doença de Parkinson/metabolismo
14.
Cancer ; 127(11): 1779-1787, 2021 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-33539547

RESUMO

BACKGROUND: Risk stratification for patients with differentiated thyroid cancer (DTC) is based primarily on pathologic tumor characteristics. Accurate preoperative prognostication could allow for more informed initial surgical recommendations, particularly among patients at a higher risk for distant metastasis (DM). The objective of this study was to characterize the genetic profile of DTC with DM and to validate a molecular-based risk stratification. METHODS: A case-control study design was used to analyze patients who had DTC with DM (n = 62) and a propensity matched cohort of patients who had DTC without DM after at least 5 years of follow-up using the ThyroSeq version 3 targeted next-generation sequencing assay. The results were classified into high-risk, intermediate-risk, and low-risk of aggressive disease. RESULTS: Most patients who had DTC with DM (66%) had a late-hit mutation in TERT, TP53, or PIK3CA. After propensity matching by age, tumor size, and sex, the high-risk molecular profile had strong association with DM (high-risk vs intermediate-risk: odds ratio, 25.1; 95% CI, 3.07-204.4; P < .001; high-risk vs low-risk: odds ratio, 122.5; 95% CI, 14.5-1038.4; P < .001). Overall, molecular risk categories were associated with DM risk, with a concordance index of 0.836 (95% CI, 0.759-0.913), which remained consistent after internal validation. Within the range of 5% to 10% of DM observed in DTC, the expected probability of DM would be 0.2% to 0.4% for the low-risk molecular profile, 4.7% to 9.4% for the intermediate-risk molecular profile, and 19.3% to 33.5% for the high-risk molecular profile. CONCLUSIONS: In this matched case-control study, genetic profiling using an available molecular assay provided accurate and robust risk stratification for DM in patients with DTC. The availability of preoperative prognostication may allow tailoring treatment for patients with DTC.


Assuntos
Adenocarcinoma , Neoplasias da Glândula Tireoide , Adenocarcinoma/genética , Adenocarcinoma/patologia , Estudos de Casos e Controles , Humanos , Mutação , Medição de Risco , Neoplasias da Glândula Tireoide/genética , Neoplasias da Glândula Tireoide/patologia
15.
Mol Psychiatry ; 25(11): 2786-2799, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-30116027

RESUMO

Recent clinical and preclinical studies suggest that selective activators of the M4 muscarinic acetylcholine receptor have potential as a novel treatment for schizophrenia. M4 activation inhibits striatal dopamine release by mobilizing endocannabinoids, providing a mechanism for local effects on dopamine signaling in the striatum but not in extrastriatal areas. G protein-coupled receptors (GPCRs) typically induce endocannabinoid release through activation of Gαq/11-type G proteins whereas M4 transduction occurs through Gαi/o-type G proteins. We now report that the ability of M4 to inhibit dopamine release and induce antipsychotic-like effects in animal models is dependent on co-activation of the Gαq/11-coupled mGlu1 subtype of metabotropic glutamate (mGlu) receptor. This is especially interesting in light of recent findings that multiple loss of function single nucleotide polymorphisms (SNPs) in the human gene encoding mGlu1 (GRM1) are associated with schizophrenia, and points to GRM1/mGlu1 as a gene within the "druggable genome" that could be targeted for the treatment of schizophrenia. Herein, we report that potentiation of mGlu1 signaling following thalamo-striatal stimulation is sufficient to inhibit striatal dopamine release, and that a novel mGlu1 positive allosteric modulator (PAM) exerts robust antipsychotic-like effects through an endocannabinoid-dependent mechanism. However, unlike M4, mGlu1 does not directly inhibit dopamine D1 receptor signaling and does not reduce motivational responding. Taken together, these findings highlight a novel mechanism of cross talk between mGlu1 and M4 and demonstrate that highly selective mGlu1 PAMs may provide a novel strategy for the treatment of positive symptoms associated with schizophrenia.


Assuntos
Regulação Alostérica/efeitos dos fármacos , Antipsicóticos/metabolismo , Receptor Muscarínico M4/metabolismo , Receptores de Glutamato Metabotrópico/metabolismo , Animais , Ácido Glutâmico/metabolismo , Camundongos , Camundongos Endogâmicos C57BL
16.
Lupus ; 30(4): 597-607, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33413005

RESUMO

Systemic lupus erythematosus (SLE) is a systemic autoimmune/inflammatory disease. Patients diagnosed with juvenile-onset SLE (jSLE), when compared to individuals with adult-onset SLE, develop more severe organ involvement, increased disease activity and greater tissue and organ damage. In adult-onset SLE, clinical characteristics, pathomechanisms, disease progression and outcomes do not only vary between individuals and age groups, but also ethnicities. However, in children and young people, the influence of ethnicity on disease onset, phenotype and outcome has not been investigated in detail. In this study, we investigated clinical and laboratory characteristics in pediatric SLE patients from different ethnic backgrounds (White Caucasian, Asian, Black African/Caribbean) accessing data from a national cohort of jSLE patients (the UK JSLE Cohort Study). Among jSLE patients in the UK, ethnicity affects both the disease's clinical course and outcomes. At diagnosis, Black African/Caribbean jSLE patients show more "classical" laboratory and clinical features when compared to White Caucasian or Asian patients. Black African/Caribbean jSLE patients exhibit more renal involvement and more frequently receive cyclophosphamide and rituximab. Studies targeting ethnicity-specific contributors to disease expression and phenotypes are necessary to improve our pathophysiological understanding, diagnosis and treatment of jSLE.


Assuntos
Etnicidade/estatística & dados numéricos , Laboratórios/estatística & dados numéricos , Lúpus Eritematoso Sistêmico/diagnóstico , Lúpus Eritematoso Sistêmico/etnologia , Nefrite Lúpica/tratamento farmacológico , Adolescente , Idade de Início , Criança , Estudos de Coortes , Ciclofosfamida/uso terapêutico , Progressão da Doença , Quimioterapia Combinada , Feminino , Seguimentos , Humanos , Fatores Imunológicos/uso terapêutico , Imunossupressores/uso terapêutico , Lúpus Eritematoso Sistêmico/tratamento farmacológico , Lúpus Eritematoso Sistêmico/imunologia , Nefrite Lúpica/complicações , Nefrite Lúpica/etnologia , Nefrite Lúpica/fisiopatologia , Masculino , Fenótipo , Rituximab/uso terapêutico , Índice de Gravidade de Doença , Reino Unido/etnologia
17.
Lupus ; 30(12): 1955-1965, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34601989

RESUMO

INTRODUCTION: Juvenile-onset systemic lupus erythematosus (JSLE) is a rare autoimmune/inflammatory disease with significant morbidity and mortality. Neuropsychiatric (NP) involvement is a severe complication, encompassing a heterogeneous range of neurological and psychiatric manifestations. METHODS: Demographic, clinical, and laboratory features of NP-SLE were assessed in participants of the UK JSLE Cohort Study, and compared to patients in the same cohort without NP manifestations. RESULTS: A total of 428 JSLE patients were included in this study, 25% of which exhibited NP features, half of them at first visit. Most common neurological symptoms among NP-JSLE patients included headaches (78.5%), mood disorders (48.6%), cognitive impairment (42%), anxiety (23.3%), seizures (19.6%), movement disorders (17.7%), and cerebrovascular disease (14.9%). Peripheral nervous system involvement was recorded in 7% of NP-SLE patients. NP-JSLE patients more frequently exhibited thrombocytopenia (<100 × 109/L) (p = 0.04), higher C-reactive protein levels (p = 0.01), higher global pBILAG score at first visit (p < 0.001), and higher SLICC damage index score at first (p = 0.02) and last (p < 0.001) visit when compared to JSLE patients without NP involvement. CONCLUSIONS: A significant proportion of JSLE patients experience NP involvement (25%). Juvenile-onset NP-SLE most commonly affects the CNS and is associated with increased overall disease activity and damage.


Assuntos
Lúpus Eritematoso Sistêmico/complicações , Vasculite Associada ao Lúpus do Sistema Nervoso Central , Adolescente , Criança , Estudos de Coortes , Feminino , Humanos , Lúpus Eritematoso Sistêmico/epidemiologia , Vasculite Associada ao Lúpus do Sistema Nervoso Central/epidemiologia , Vasculite Associada ao Lúpus do Sistema Nervoso Central/psicologia , Masculino , Transtornos Mentais/etiologia , Reino Unido/epidemiologia
18.
Psychooncology ; 30(11): 1849-1858, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34160847

RESUMO

OBJECTIVE: Adolescents and young adults (AYAs) diagnosed with cancer commonly experience elevated psychological distress and need appropriate detection and management of the psychosocial impact of their illness and treatment. This paper describes the multinational validation of the Distress Thermometer (DT) for AYAs recently diagnosed with cancer and the relationship between distress and patient concerns on the AYA-Needs Assessment (AYA-NA). METHODS: AYA patients (N = 288; 15-29 years, Mage  = 21.5 years, SDage  = 3.8) from Australia (n = 111), Canada (n = 67), the UK (n = 85) and the USA (n = 25) completed the DT, AYA-NA, Hospital Anxiety Depression Scale (HADS) and demographic measures within 3 months of diagnosis. Using the HADS as a criterion, receiver operating characteristics analysis was used to determine the optimal cut-off score and meet the acceptable level of 0.70 for sensitivity and specificity. Correlations between the DT and HADS scores, prevalence of distress and AYA-NA scores were reported. RESULTS: The DT correlated strongly with the HADS-Total, providing construct validity evidence (r = 0.65, p < 0.001). A score of 5 resulted in the best clinical screening cut-off on the DT (sensitivity = 82%, specificity = 75%, Youden Index = 0.57). Forty-two percent of AYAs scored at or above 5. 'Loss of meaning or purpose' was the AYA-NA item most likely to differentiate distressed AYAs. CONCLUSIONS: The DT is a valid distress screening instrument for AYAs with cancer. The AYA-POST (DT and AYA-NA) provides clinicians with a critical tool to assess the psychosocial well-being of this group, allowing for the provision of personalised support and care responsive to individuals' specific needs and concerns.


Assuntos
Neoplasias , Psico-Oncologia , Adolescente , Adulto , Ansiedade/diagnóstico , Ansiedade/epidemiologia , Pré-Escolar , Humanos , Programas de Rastreamento , Neoplasias/psicologia , Estresse Psicológico/psicologia , Inquéritos e Questionários , Adulto Jovem
19.
Br J Clin Pharmacol ; 87(11): 4408-4420, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-33884664

RESUMO

AIMS: Population pharmacokinetic (PK) models are increasingly applied to perform individualized dosing of factor VIII (FVIII) concentrates in haemophilia A patients. To guarantee accurate performance of a population PK model in dose individualization, validation studies are of importance. However, external validation of population PK models requires independent data sets and is, therefore, seldomly performed. Therefore, this study aimed to validate a previously published population PK model for FVIII concentrates administrated perioperatively. METHODS: A previously published population PK model for FVIII concentrate during surgery was validated using independent data from 87 children with severe haemophilia A with a median (range) age of 2.6 years (0.03-15.2) and body weight of 14 kg (4-57). First, the predictive performance of the previous model was evaluated with MAP Bayesian analysis using NONMEM v7.4. Subsequently, the model parameters were (re)estimated using a combined dataset consisting of the previous modelling data and the data available for the external validation. RESULTS: The previous model underpredicted the measured FVIII levels with a median of 0.17 IU mL-1 . Combining the new, independent and original data, a dataset comprising 206 patients with a mean age of 7.8 years (0.03-77.6) and body weight of 30 kg (4-111) was obtained. Population PK modelling provided estimates for CL, V1, V2, and Q: 171 mL h-1  68 kg-1 , 2930 mL 68 kg-1 , 1810 mL 68 kg-1 , and 172 mL h-1  68 kg-1 , respectively. This model adequately described all collected FVIII levels, with a slight median overprediction of 0.02 IU mL-1 . CONCLUSIONS: This study emphasizes the importance of external validation of population PK models using real-life data.


Assuntos
Hemofilia A , Teorema de Bayes , Peso Corporal , Criança , Pré-Escolar , Estudos de Coortes , Fator VIII , Hemofilia A/tratamento farmacológico , Humanos
20.
Ann Emerg Med ; 78(5): 650-657, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34373141

RESUMO

STUDY OBJECTIVE: Heuristics, or rules of thumb, are hypothesized to influence the care physicians deliver. One such heuristic is the availability heuristic, under which assessments of an event's likelihood are affected by how easily the event comes to mind. We examined whether the availability heuristic influences physician testing in a common, high-risk clinical scenario: assessing patients with shortness of breath for the risk of pulmonary embolism. METHODS: We performed an event study from 2011 to 2018 of emergency physicians caring for patients presenting with shortness of breath to 104 Veterans Affairs (VA) hospitals. Our measures were physician rates of pulmonary embolism testing (D-dimer and/or computed tomography scan) for subsequent patients after having a patient visit with a pulmonary embolism discharge diagnosis, hypothesizing that physician rates of pulmonary embolism testing would increase after having a recent patient visit with a pulmonary embolism diagnosis due to the availability heuristic. RESULTS: The sample included 7,370 emergency physicians who had 416,720 patient visits for shortness of breath. The mean rate of pulmonary embolism testing was 9.0%. For physicians who had a recent patient visit with a pulmonary embolism diagnosis, their rate of pulmonary embolism testing for subsequent patients increased by 1.4 percentage points (95% confidence interval 0.42 to 2.34) in the 10 days after, which is approximately 15% relative to the mean rate of pulmonary embolism testing. We failed to find statistically significant changes in rates of pulmonary embolism testing in the subsequent 50 days following these first 10 days. CONCLUSION: After having a recent patient visit with a pulmonary embolism diagnosis, physicians increase their rates of pulmonary embolism testing for subsequent patients, but this increase does not persist. These results provide large-scale evidence that the availability heuristic may play a role in complex testing decisions.


Assuntos
Medicina de Emergência/normas , Fidelidade a Diretrizes/normas , Embolia Pulmonar/diagnóstico , Embolia Pulmonar/terapia , Serviços de Saúde para Veteranos Militares/normas , Adulto , Idoso , Idoso de 80 Anos ou mais , Dispneia , Registros Eletrônicos de Saúde , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA