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1.
Hematol Oncol ; 40(4): 626-636, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35644011

RESUMO

There is an increased risk of congestive heart failure (CHF) following anthracycline-based chemotherapy in patients with Diffuse Large B-cell lymphoma (DLBCL). Little is known about risk factors of CHF, other cardiovascular events (CVE), and CVE effect on outcomes. We conducted a retrospective review of 463 newly diagnosed DLBCL patients treated between 2002 and 2016 with anthracycline containing regimens. At a median follow up of 71.3 months, 10.4% patients developed new CHF, 4.97% had new atrial fibrillation and 3.2% had new coronary artery disease. Age over 65, advanced stage DLBCL and diabetes were associated with increased cumulative incidence of CVE. Patients with prior diabetes had decreased progression-free survival and overall survival in comparison to non-diabetics. Patients who had a CVE in the first year had significant worse OS then patients who did not have a CVE (Hazard Ratio 10.0, 95% CI, 7.24-13.88). A risk score incorporating age at DLBCL diagnosis, baseline lymphocyte count, disease stage and diabetes stratified into groups with low, intermediate and high risk for CVE, with 1-year cumulative incidence of CVE of 5.3%, 7.9% and 13.4%. Diffuse large B-cell lymphoma patients treated with anthracycline containing regimens have high incidence of CVE, which are not limited to CHF. Clinical variables at the time of diagnosis can identify the group of DLBCL patients at highest risk of CVE, for whom preventive interventions should be considered.


Assuntos
Doenças Cardiovasculares , Linfoma Difuso de Grandes Células B , Antraciclinas/efeitos adversos , Antibióticos Antineoplásicos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Doenças Cardiovasculares/induzido quimicamente , Humanos , Linfoma Difuso de Grandes Células B/patologia , Prognóstico , Estudos Retrospectivos , Fatores de Risco
2.
Sensors (Basel) ; 22(23)2022 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-36502201

RESUMO

Cross-spectral face verification between short-wave infrared (SWIR) and visible light (VIS) face images poses a challenge, which is motivated by various real-world applications such as surveillance at night time or in harsh environments. This paper proposes a hybrid solution that takes advantage of both traditional feature engineering and modern deep learning techniques to overcome the issue of limited imagery as encountered in the SWIR band. Firstly, the paper revisits the theory of measurement levels. Then, two new operators are introduced which act at the nominal and interval levels of measurement and are named the Nominal Measurement Descriptor (NMD) and the Interval Measurement Descriptor (IMD), respectively. A composite operator Gabor Multiple-Level Measurement (GMLM) is further proposed which fuses multiple levels of measurement. Finally, the fused features of GMLM are passed through a succinct and efficient neural network based on PCA. The network selects informative features and also performs the recognition task. The overall framework is named GMLM-CNN. It is compared to both traditional hand-crafted operators as well as recent deep learning-based models that are state-of-the-art, in terms of cross-spectral verification performance. Experiments are conducted on a dataset which comprises frontal VIS and SWIR faces acquired at varying standoffs. Experimental results demonstrate that, in the presence of limited data, the proposed hybrid method GMLM-CNN outperforms all the other methods.


Assuntos
Mãos , Redes Neurais de Computação , Ondas de Rádio
3.
J Biol Chem ; 294(17): 7068-7084, 2019 04 26.
Artigo em Inglês | MEDLINE | ID: mdl-30792310

RESUMO

Ras genes potently drive human cancers, with mutated proto-oncogene GTPase KRAS4B (K-Ras4B) being the most abundant isoform. Targeted inhibition of oncogenic gene products is considered the "holy grail" of present-day cancer therapy, and recent discoveries of small-molecule KRas4B inhibitors were made thanks to a deeper understanding of the structure and dynamics of this GTPase. Because interactions with biological membranes are key for Ras function, Ras-lipid interactions have become a major focus, especially because such interactions evidently involve both the Ras C terminus for lipid anchoring and its G-protein domain. Here, using NMR spectroscopy and molecular dynamics simulations complemented by biophysical- and cell-biology assays, we investigated the interaction between K-Ras4B with the signaling lipid phosphatidylinositol (4,5)-phosphate (PIP2). We discovered that the ß2 and ß3 strands as well as helices 4 and 5 of the GTPase G-domain bind to PIP2 and identified the specific residues in these structural elements employed in these interactions, likely occurring in two K-Ras4B orientation states relative to the membrane. Importantly, we found that some of these residues known to be oncogenic when mutated (D47K, D92N, K104M, and D126N) are critical for K-Ras-mediated transformation of fibroblast cells, but do not substantially affect basal and assisted nucleotide hydrolysis and exchange. Moreover, the K104M substitution abolished localization of K-Ras to the plasma membrane. The findings suggest that specific G-domain residues can critically regulate Ras function by mediating interactions with membrane-associated PIP2 lipids; these insights that may inform the future design of therapeutic reagents targeting Ras activity.


Assuntos
Lipídeos de Membrana/metabolismo , Fosfoinositídeo Fosfolipase C/metabolismo , Proteínas Proto-Oncogênicas p21(ras)/metabolismo , Sequência de Aminoácidos , Humanos , Ressonância Magnética Nuclear Biomolecular , Ligação Proteica , Conformação Proteica , Domínios Proteicos , Proto-Oncogene Mas , Proteínas Proto-Oncogênicas p21(ras)/química
4.
Am J Hematol ; 95(8): 918-926, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32311162

RESUMO

Venous thromboembolic events (VTE) are a frequent complication of lymphoma. We conducted a retrospective analysis to compare VTE risk in diffuse large B-cell lymphoma (DLBCL) and follicular lymphoma (FL). Subjects were randomly assigned to training and validation sets to identify risk factors of VTE and evaluate risk model performance, including the Khorana score. A group of 790 patients were diagnosed from 2002 to 2014 (DLBCL = 542, FL = 248). Median follow- up was 49 months. We observed 106 VTE, with higher incidence in DLBCL (5-year cumulative incidence = 16.3% vs 3.8% in FL patients). Five-year OS for patients with VTE was 51.4% vs 73.1% in patients without VTE (P < .001). Baseline VTE risk factors identified in the training cohort included lymphoma subtype, previous VTE, ECOG performance status ≥2, decreased albumin, increased calcium, elevated WBC, absolute lymphocyte count or monocyte count, and presence of bulky disease. Addition of new variables to the Khorana score improved its performance measured by Akaike information criterion and Concordance index. A new risk model including lymphoma subtype, albumin, WBC count, and bulky disease was validated in time-based ROC analyses. These findings were confirmed in the validation cohort. Lymphoma subtypes have different VTE risk. The effect of lymphoma subtype was independent from disease burden and the use of systemic therapy. The Khorana risk-score was validated in time to event analyses, and a more robust lymphoma-specific VTE risk score is proposed. These findings suggest lymphoma patients with highest VTE risk can be identified with baseline parameters.


Assuntos
Linfoma Difuso de Grandes Células B/complicações , Trombose Venosa/etiologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Medição de Risco , Fatores de Risco , Trombose Venosa/patologia , Adulto Jovem
5.
J Biol Chem ; 293(20): 7659-7673, 2018 05 18.
Artigo em Inglês | MEDLINE | ID: mdl-29618512

RESUMO

Rap1 proteins are members of the Ras subfamily of small GTPases involved in many biological responses, including adhesion, cell proliferation, and differentiation. Like all small GTPases, they work as molecular allosteric units that are active in signaling only when associated with the proper membrane compartment. Prenylation, occurring in the cytosol, is an enzymatic posttranslational event that anchors small GTPases at the membrane, and prenyl-binding proteins are needed to mask the cytoplasm-exposed lipid during transit to the target membrane. However, several of these proteins still await discovery. In this study, we report that cyclase-associated protein 1 (CAP1) binds Rap1. We found that this binding is GTP-independent, does not involve Rap1's effector domain, and is fully contained in its C-terminal hypervariable region (HVR). Furthermore, Rap1 prenylation was required for high-affinity interactions with CAP1 in a geranylgeranyl-specific manner. The prenyl binding specifically involved CAP1's C-terminal hydrophobic ß-sheet domain. We present a combination of experimental and computational approaches, yielding a model whereby the high-affinity binding between Rap1 and CAP1 involves electrostatic and nonpolar side-chain interactions between Rap1's HVR residues, lipid, and CAP1 ß-sheet domain. The binding was stabilized by the lipid insertion into the ß-solenoid whose interior was occupied by nonpolar side chains. This model was reminiscent of the recently solved structure of the PDEδ-K-Ras complex; accordingly, disruptors of this complex, e.g. deltarasin, blocked the Rap1-CAP1 interaction. These findings indicate that CAP1 is a geranylgeranyl-binding partner of Rap1.


Assuntos
Proteínas de Ciclo Celular/metabolismo , Proteínas do Citoesqueleto/metabolismo , Diterpenos/metabolismo , Prenilação de Proteína , Células Epiteliais da Tireoide/metabolismo , Proteínas rap de Ligação ao GTP/metabolismo , Animais , Proteínas de Ciclo Celular/química , Proteínas de Ciclo Celular/genética , Células Cultivadas , Proteínas do Citoesqueleto/química , Proteínas do Citoesqueleto/genética , Diterpenos/química , Humanos , Modelos Moleculares , Simulação de Dinâmica Molecular , Conformação Proteica , Ratos , Proteínas rap de Ligação ao GTP/química , Proteínas rap de Ligação ao GTP/genética
6.
Pediatr Res ; 85(3): 318-323, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30538265

RESUMO

BACKGROUND: Bronchopulmonary dysplasia (BPD) is a chronic lung disease and major pulmonary complication after premature birth. We have previously shown that increased intermittent hypoxemia (IH) events have been correlated to adverse outcomes and mortality in extremely premature infants. We hypothesize that early IH patterns are associated with the development of BPD. METHODS: IH frequency, duration, and nadirs were assessed using oxygen saturation (SpO2) waveforms in a retrospective cohort of 137 extremely premature newborns (<28 weeks gestation). Daily levels of inspired oxygen and mean airway pressure exposures were also recorded. RESULTS: Diagnosis of BPD at 36 weeks postmenstrual age was associated with increased daily IH, longer IH duration, and a higher IH nadir. Significant differences were detected through day 7 to day 26 of life. Infants who developed BPD had lower mean SpO2 despite their exposure to increased inspired oxygen and increased mean airway pressure. CONCLUSIONS: BPD was associated with more frequent, longer, and less severe IH events in addition to increased oxygen and pressure exposure within the first 26 days of life. Early IH patterns may contribute to the development of BPD or aid in identification of neonates at high risk.


Assuntos
Displasia Broncopulmonar/diagnóstico , Hipóxia/diagnóstico , Doenças do Recém-Nascido/diagnóstico , Displasia Broncopulmonar/complicações , Feminino , Idade Gestacional , Humanos , Hipóxia/complicações , Lactente Extremamente Prematuro , Recém-Nascido , Recém-Nascido de muito Baixo Peso , Terapia Intensiva Neonatal , Masculino , Oximetria , Oxigênio/metabolismo , Pressão , Estudos Retrospectivos , Resultado do Tratamento
7.
Biochemistry ; 53(12): 1971-81, 2014 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-24597855

RESUMO

In-cell NMR spectroscopy provides insight into protein conformation, dynamics, and function at atomic resolution in living cells. Systematic evaluation of isotopic-labeling strategies is necessary to observe the target protein in the sea of other molecules in the cell. Here, we investigate the detectability, sensitivity, and resolution of in-cell NMR spectra of the globular proteins GB1, ubiquitin, calmodulin, and bcl-xl-cutloop, resulting from uniform (15)N enrichment (with and without deuteration), selective (15)N-Leu enrichment, (13)C-methyl enrichment of isoleucine, leucine, valine, and alanine, fractional (13)C enrichment, and (19)F labeling. Most of the target proteins can be observed by (19)F labeling and (13)C enrichment with direct detection because selectively labeling suppresses background signals and because deuteration improves in-cell spectra. Our results demonstrate that the detectability of proteins is determined by weak interactions with intercellular components and that choosing appropriate labeling strategies is critical for the success of in-cell protein NMR studies.


Assuntos
Proteínas de Escherichia coli/química , Proteínas de Escherichia coli/fisiologia , Ressonância Magnética Nuclear Biomolecular/métodos , Calmodulina/química , Calmodulina/fisiologia , Células Cultivadas , Escherichia coli/química , Escherichia coli/fisiologia , Humanos , Simulação de Dinâmica Molecular , Conformação Proteica , Ubiquitina/química , Ubiquitina/fisiologia
9.
Heliyon ; 10(6): e27120, 2024 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-38501001

RESUMO

Understanding how social dynamics interact with natural hazards is one of the main challenges at global and local scales in the world for studying social vulnerability to natural hazards. In this study, we explore the spatial and temporal changes of social vulnerability of cities in Zhejiang province to natural hazards in China for the last decade. Based on the Zhejiang province's census data and the demographics and socioeconomic data during the period from 2009 to 2018, we have characterized social vulnerability through the Social Vulnerability Index (SoVI) for 11 cities throughout the province during 2009-2018 and examined spatial changes in social vulnerability using equal interval method. The results indicated that although the comprehensive vulnerability of Zhejiang province shows a declining trend at a county level, the social vulnerability of different city at the provincial level has obvious differences.

10.
Cancer Manag Res ; 15: 913-927, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37674660

RESUMO

Purpose: Disparities in cancer care delivery remain a pressing health-care crisis within the United States (US). The use of immune checkpoint inhibitors (ICIs) and their management may be a disparity generator that impacts survival. This retrospective study assessed disparities in a cohort of patients with a variety of solid tumors treated with ICIs within a single health-care organization focusing on the impact of race, socioeconomic status (SES) and site of care delivery on survival and the development of severe immune-related adverse events (irAEs). Patients and Methods: Manual chart review was performed on all patients with solid tumors treated with ICIs within a health-care organization from 2012 to 2018. Care delivery was dichotomized as DOP (disease-oriented provider at academic center) and COP (community oncology provider). Primary and secondary outcomes were overall survival (OS) and rates of grade 3-4 irAEs, respectively. Relationships with covariates of interest, including race, socioeconomic status and type of care delivery, were assessed among both outcomes. Results: A total of 1070 eligible patients were identified. Of those, 11.4% were of Black race, 59.7% had either non-small cell lung cancer (NSCLC) or melanoma and 82.8% had stage IV disease. Patients of Black race and lower SES were more likely to be treated by DOPs (p<0.0001). A superior OS was associated with care delivered by DOPs when compared to COPs (HR 0.68; 95% CI 0.56-0.84; p=0.0002), which was durable after accounting for race, SES, histopathologic diagnosis and disease stage. Melanoma patients experienced higher rates of severe irAEs (HR 2.37; 95% CI 1.42-3.97; p=0.001). Race, SES and site of care delivery were not related to rates of severe irAEs. Conclusion: In a large health-care organization, patients treated with checkpoint inhibitors by DOPs benefited from a significant OS advantage that was durable after controlling for racial and socioeconomic factors, providing evidence that disease-oriented care has the potential to mitigate racial and socioeconomic disparities.

11.
Cancer Med ; 12(12): 13086-13099, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37102221

RESUMO

BACKGROUND: Patients with certain autoimmune conditions are at a reduced risk of developing breast cancer compared to the general population. Despite this, little is known about outcomes in patients with breast cancer who have a concurrent autoimmune diagnosis. METHODS: This study compared differences in outcomes between women with breast cancer who had or did not have an autoimmune diagnosis. The SEER-Medicare databases (2007-2014) were used to identify patients with breast cancer and diagnosis codes were used to identify those with an autoimmune disorder. RESULTS: The studied autoimmune diseases had a prevalence of 27% among the 137,324 patients with breast cancer. Autoimmune disease was associated with significantly longer overall survival (OS) and significantly lower cancer-specific mortality (CSM) among stage IV breast cancer patients (p < 0.0001). After controlling for the effects of age, race, chronic kideny disease, chemotherapy, and radiation therapy autoimmune disease was still predictive of improved OS (HR: 1.45, 95% CI: 1.35-1.55, p < 0.0001) and CSM (HR: 1.40, 95% CI: 1.29-1.5, p < 0.0001). By contrast, in patients with stage I-III breast cancer, the presence of an autoimmune diagnosis was associated with a lower OS (p < 0.0001, p < 0.0001, and p = 0.026, respectively), compared to patients without autoimmune disease. CONCLUSIONS: We found a higher prevalence of rheumatoid arthritis, Crohn's disease, ulcerative colitis, and systemic lupus erythematosus in patients with breast cancer compared to age matched cohorts in the general population. The presence of an autoimmune diagnosis was associated with a lower OS in stages I-III breast cancer and improved OS and CSM in patients with stage IV disease. These results suggest that anti-tumor immunity plays an important role in late stage breast cancer and could potentially be exploited to improve the effectiveness of immunotherapy.


Assuntos
Doenças Autoimunes , Neoplasias da Mama , Humanos , Feminino , Idoso , Estados Unidos/epidemiologia , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/terapia , Neoplasias da Mama/diagnóstico , Medicare , Doenças Autoimunes/complicações , Doenças Autoimunes/epidemiologia , Programa de SEER , Estadiamento de Neoplasias
12.
Mol Biol Rep ; 39(5): 5085-93, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22161247

RESUMO

Vascular endothelial growth factor (VEGF) plays a crucial role in tumor angiogenesis. VEGF induces new vessel formation and tumor growth by inducing mitogenesis and chemotaxis of normal endothelial cells and increasing vascular permeability. However, little is known about VEGF function in the proliferation, survival or migration of hepatocellular carcinoma cells (HCC). In the present study, we have found that VEGF receptors are expressed in HCC line BEL7402 and human HCC specimens. Importantly, VEGF receptor expression correlates with the development of the carcinoma. By using a comprehensive approaches including TUNEL assay, transwell and wound healing assays, migration and invasion assays, adhesion assay, western blot and quantitative RT-PCR, we have shown that knockdown of VEGF165 expression by shRNA inhibits the proliferation, migration, survival and adhesion ability of BEL7402. Knockdown of VEGF165 decreased the expression of NF-κB p65 and PKCα while increased the expression of p53 signaling molecules, suggesting that VEGF functions in HCC proliferation and migration are mediated by P65, PKCα and/or p53.


Assuntos
Carcinoma Hepatocelular/patologia , Movimento Celular , Neoplasias Hepáticas/patologia , Fator A de Crescimento do Endotélio Vascular/metabolismo , Carcinoma Hepatocelular/enzimologia , Adesão Celular , Linhagem Celular Tumoral , Proliferação de Células , Sobrevivência Celular , Humanos , Neoplasias Hepáticas/enzimologia , Invasividade Neoplásica , Proteína Quinase C-alfa/metabolismo , RNA Interferente Pequeno/metabolismo , Receptores de Fatores de Crescimento do Endotélio Vascular/metabolismo , Proteína Supressora de Tumor p53/metabolismo
13.
Cancers (Basel) ; 14(2)2022 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-35053444

RESUMO

Human papillomavirus-associated head and neck squamous cell carcinoma (HPV+ HNSCC) is recognized as a distinct disease with unique etiology and clinical features. Current standard of care therapeutic modalities are identical for HPV+ and HPV- HNSCC and thus, there remains an opportunity to develop innovative pharmacologic approaches to exploit the inherent vulnerabilities of HPV+ HNSCC. In this study, using an inducible HPVE6E7 knockdown system, we found that HPV+ HNSCC cells are addicted to HPVE6E7, such that loss of these viral oncogenes impaired tumorigenicity in vitro and in vivo. A number of druggable pathways, including PPAR and Wnt, were modulated in response to HPVE6E7 loss. Fenofibrate showed significant anti-proliferative effects in a panel of HPV+ cancer cell lines. Additionally, fenofibrate impaired tumor growth as monotherapy and potentiated the activity of cisplatin in a pre-clinical HPV+ animal model. Systemic fenofibrate treatment induced p53 protein accumulation, and surprisingly, re-programmed the tumor-immune microenvironment to drive immune cell infiltration. Since fenofibrate is FDA-approved with a favorable long-term safety record, repositioning of this drug, as a single agent or in combination with cisplatin or checkpoint blockade, for the HPV+ HNSCC setting should be prioritized.

14.
Clin Cancer Res ; 28(4): 646-652, 2022 02 15.
Artigo em Inglês | MEDLINE | ID: mdl-34740922

RESUMO

PURPOSE: TRC102, a small-molecule base-excision repair inhibitor, potentiates the cytotoxicity of pemetrexed and reverses resistance by binding to chemotherapy-induced abasic sites in DNA. We conducted a phase I clinical trial combining pemetrexed and TRC102 with cisplatin-radiation in stage III nonsquamous non-small cell lung cancer (NS-NSCLC). PATIENTS AND METHODS: Fifteen patients were enrolled from 2015 to 2019. The primary objective was to determine the dose-limiting toxicity and maximum tolerated dose of TRC102 in combination with pemetrexed, cisplatin, and radiotherapy. Secondary objectives were to assess toxicity, tumor response, and progression-free survival at 6 months. Based on our preclinical experiments, pemetrexed-TRC102 was given on day 1, and cisplatin/radiotherapy was initiated on day 3. This schedule was duplicated in the second cycle. After completion, two additional cycles of pemetrexed-cisplatin were given. Toxicities were assessed using NCI CTACAE versions 4/5. RESULTS: The median age was 69 years (45-79) with the median follow-up of 25.7 months (range, 7.9-47.4). No dose-limiting toxicities and no grade 5 toxicity were seen. Hematologic and gastrointestinal toxicities were the most common side effects. No clinical radiation pneumonitis was seen. Of 15 evaluable patients, three had complete response (20%), and 12 had partial response (80%). The 6-month progression-free survival was 80%, and the 2-year overall survival was 83%. CONCLUSIONS: Pemetrexed-TRC102 combined with cisplatin/radiotherapy in NS-NSCLC is safe and well tolerated. The recommended phase II dose is 200 mg TRC102 along with cisplatin-pemetrexed. No additional safety signal was seen beyond the expected CRT risks. A phase II trial, integrating post-CRT immunotherapy with this aggressive DNA-damaging regimen, is warranted.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/radioterapia , Cisplatino , Reparo do DNA , Glutamatos/efeitos adversos , Guanina/efeitos adversos , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Pemetrexede/efeitos adversos , Platina/uso terapêutico
15.
JTO Clin Res Rep ; 3(9): 100375, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35992245

RESUMO

Introduction: Autoimmune disease has both a predisposing and a protective effect toward malignancy. Though studies have investigated the risk of malignancy in patients with autoimmune disease, there is limited research on how autoimmunity affects survival. Methods: This study compared survival in patients with lung cancer with and without autoimmune disease. Patients with lung cancer were culled from the Surveillance, Epidemiology, and End Results Medicare databases (2007-2014), and autoimmune diseases were identified using diagnosis codes. Results: The overall prevalence of investigated autoimmune diseases among the 112,445 patients was 22.7%. Overall survival (OS) (p < 0.0001) was longer and cancer-specific mortality (CSM) (p < 0.0001) reduced among patients with autoimmune disease. Median OS was 5 months higher. Improved OS and CSM were also apparent in disease stages 1, 3, and 4 in the NSCLC and SCLC subgroups (p < 0.0001) and across most specific autoimmune diseases. After adjusting for the effects of age, sex, race, disease stage, and chronic kidney disease, autoimmune disease was still predictive of higher OS (hazard ratio = 1.23, 95% confidence interval: 1.21-1.25, p < 0.0001) and reduced CSM (hazard ratio = 1.16, 95% confidence interval: 1.14-1.18, p < 0.0001). Conclusions: The prevalence of rheumatoid arthritis, inflammatory bowel disease, and systemic lupus erythematous was highly enriched compared with the general population. The improvement in OS and CSM was larger in NSCLC than in SCLC, suggesting a larger role for the immune system in NSCLC. Alternate explanations for the improved survival include lead time bias, better access to health care, and a survival or autoimmunity-inducing genetic factor.

17.
Biotechnol Lett ; 33(10): 2005-11, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21660575

RESUMO

Sterol 14α-demethylase from Penicillium digitatum (PdCYP51) is a prime target of antifungal drugs for citrus disease in plants. To design novel antifungal compounds, a homology model of PdCYP51 was constructed using the recently reported crystal structure of human CYP51 as the template. Molecular docking was performed to investigate the interaction of four commercial fungicides with the modeled enzyme. The side chain of these compounds interplayed with PdCYP51 mainly through hydrophobic and van der Waals interactions. Biochemical spectra analysis of inhibitors combined with PdCYP51 are also compatible with the docking results. This is the first molecular modeling for PdCYP51 based on the eukaryotic crystal structure of CYP51. The structural information and binding site mapping of PdCYP51 for different inhibitors obtained from this study could aid in screening and designing new antifungal compounds targeting this enzyme.


Assuntos
Antifúngicos/metabolismo , Penicillium/enzimologia , Esterol 14-Desmetilase/metabolismo , Antifúngicos/química , Cristalografia , Humanos , Interações Hidrofóbicas e Hidrofílicas , Modelos Moleculares , Ligação Proteica , Análise Espectral , Esterol 14-Desmetilase/química , Homologia Estrutural de Proteína , Termodinâmica , Triazóis/química , Triazóis/metabolismo
18.
J Am Board Fam Med ; 34(1): 61-69, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33452083

RESUMO

BACKGROUND: Fecal immunochemical testing (FIT) and multi-target stool DNA testing (mt-sDNA) are recommended colorectal cancer screening options but require follow-up with colonoscopy to determine the source of a positive result. We performed a retrospective analysis in an academic health system to determine adherence to colonoscopy in these patients. METHODS: We identified all patients aged 40 years and older with at least 1 primary care visit who had a positive FIT or mt-sDNA between January 2016 and June 2018. We identified receipt of colonoscopy within 6 months of the positive test and reviewed medical records to determine reasons for lack of colonoscopy. RESULTS: We identified 308 eligible patients with positive FIT and 323 with positive mt-sDNA. Some patients with positive FIT (46.7%) and patients with positive mt-sDNA (71.5%) underwent colonoscopy within 6 months, and time to colonoscopy was also shorter with mt-sDNA (hazard ratio, 1.83; 95% CI, 1.48-2.25). These differences remained in a multivariable model adjusting for patient characteristics. Among patients without colonoscopy after positive FIT, 1 or more system, provider, and patient-related barriers were identified in 32.1%, 57.6%, and 36.3%, respectively. Among patients without colonoscopy after positive mt-sDNA, corresponding frequencies were 30.4%, 43.5%, and 57.6%, respectively. CONCLUSIONS: Follow-up colonoscopy was higher for mt-sDNA than FIT, which could be due in part to preselection by clinicians and/or patients. Among patients who did not follow-up, provider and system factors were as frequently encountered as patient factors. These findings reinforce the need for multi-level interventions to improve follow-up.


Assuntos
Neoplasias Colorretais , Sangue Oculto , Adulto , Colonoscopia , Neoplasias Colorretais/diagnóstico , DNA , Detecção Precoce de Câncer , Fezes , Seguimentos , Humanos , Programas de Rastreamento , Pessoa de Meia-Idade , Estudos Retrospectivos
19.
Clin Lung Cancer ; 22(1): 16-22.e1, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-33397584

RESUMO

BACKGROUND: Next generation sequencing (NGS) of tumor of patients with advanced non-small cell lung cancer (NSCLC) is now a standard of care that informs the clinician on the best therapeutic approach for their patients. The purpose of our study was to investigate the overall impact of NGS testing on survival as well as potential racial differences in utilization, therapeutic decision, and genomic alterations. METHOD: Using a large institutional database, 928 patients with stage IV NSCLC were identified. NGS testing using Foundation One platform was used. Clinical and genomic characteristics were compared by race. We used a propensity-modeling technique to compare groups that were sequenced or not in terms of overall survival. Time to event data was analyzed using Kaplan-Meier method and Cox model. RESULTS: A total of 295 patients underwent NGS. Patients undergoing NGS testing had significantly longer survival of 25.3 months versus those who did not undergo sequencing with a median survival of 14.6 months (P = .002) irrespective if they received targeted therapy or not. There was no difference in terms of NGS utilization based on race (P = .32). African American individuals had significantly higher rates of ALK rearrangements and mutations in PBRM1, SETD2, TSC2, and FBXW7. CONCLUSION: Our study demonstrates that within a large single institution there is no racial difference in NGS utilization and that NGS testing directly impacts survival. We identify a number of differences in genomic findings between African American and white individuals.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biomarcadores Tumorais/genética , Negro ou Afro-Americano/estatística & dados numéricos , Carcinoma Pulmonar de Células não Pequenas/mortalidade , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Mutação , População Branca/estatística & dados numéricos , Adenocarcinoma de Pulmão/tratamento farmacológico , Adenocarcinoma de Pulmão/etnologia , Adenocarcinoma de Pulmão/mortalidade , Adenocarcinoma de Pulmão/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/etnologia , Carcinoma Pulmonar de Células não Pequenas/patologia , Carcinoma de Células Escamosas/tratamento farmacológico , Carcinoma de Células Escamosas/etnologia , Carcinoma de Células Escamosas/mortalidade , Carcinoma de Células Escamosas/patologia , Etnicidade/estatística & dados numéricos , Feminino , Seguimentos , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/etnologia , Neoplasias Pulmonares/mortalidade , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Taxa de Sobrevida
20.
Cancer Med ; 10(13): 4312-4321, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-34033228

RESUMO

PURPOSE: Patients enrolled in Phase 1 clinical trials have typically exhausted standard therapies and often are choosing between a clinical trial and hospice care. Significant symptom burden can result in early trial discontinuation and confound trial outcomes. This study aimed to examine differences in study duration, symptom burden, adverse events (AE), and quality of life (QOL) between those receiving structured palliative care versus usual supportive care. PATIENTS AND METHODS: Sixty-eight patients enrolled in phase 1 clinical trials and 39 of their CGs were randomly assigned to receive structured palliative care or usual supportive care. Patient QOL was measured monthly using the Functional Assessment of Cancer Therapy and Memorial Symptom Assessment Scale. The Quality of Life in Life-Threatening Illness-Family Care Version and Caregiver Reaction Assessment were used for CGs. AEs and use of palliative care resources were compared between arms. RESULTS: Mean duration of the phase 1 study was 142 days in the palliative care arm versus 116 days in the usual care arm (p = 0.55). Although not statistically significant, patients in the palliative care arm experienced fewer AEs and better QOL, as did their CGs, compared to those receiving usual care. CONCLUSIONS: Phase 1 patients and their CGs have physical and psychosocial needs warranting palliative care services. Results suggest that structured palliative care is associated with the increased duration of the study and improved patient and CG QOL.


Assuntos
Ensaios Clínicos Fase I como Assunto , Neoplasias/terapia , Cuidados Paliativos/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Cuidadores , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cuidados Paliativos/estatística & dados numéricos , Qualidade de Vida , Fatores Sexuais , Avaliação de Sintomas/métodos , Fatores de Tempo
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