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1.
Sci Rep ; 14(1): 4294, 2024 02 21.
Artículo en Inglés | MEDLINE | ID: mdl-38383634

RESUMEN

Deleterious effects of environmental exposures may contribute to the rising incidence of early-onset colorectal cancer (eoCRC). We assessed the metabolomic differences between patients with eoCRC, average-onset CRC (aoCRC), and non-CRC controls, to understand pathogenic mechanisms. Patients with stage I-IV CRC and non-CRC controls were categorized based on age ≤ 50 years (eoCRC or young non-CRC controls) or  ≥ 60 years (aoCRC or older non-CRC controls). Differential metabolite abundance and metabolic pathway analyses were performed on plasma samples. Multivariate Cox proportional hazards modeling was used for survival analyses. All P values were adjusted for multiple testing (false discovery rate, FDR P < 0.15 considered significant). The study population comprised 170 patients with CRC (66 eoCRC and 104 aoCRC) and 49 non-CRC controls (34 young and 15 older). Citrate was differentially abundant in aoCRC vs. eoCRC in adjusted analysis (Odds Ratio = 21.8, FDR P = 0.04). Metabolic pathways altered in patients with aoCRC versus eoCRC included arginine biosynthesis, FDR P = 0.02; glyoxylate and dicarboxylate metabolism, FDR P = 0.005; citrate cycle, FDR P = 0.04; alanine, aspartate, and glutamate metabolism, FDR P = 0.01; glycine, serine, and threonine metabolism, FDR P = 0.14; and amino-acid t-RNA biosynthesis, FDR P = 0.01. 4-hydroxyhippuric acid was significantly associated with overall survival in all patients with CRC (Hazards ratio, HR = 0.4, 95% CI 0.3-0.7, FDR P = 0.05). We identified several unique metabolic alterations, particularly the significant differential abundance of citrate in aoCRC versus eoCRC. Arginine biosynthesis was the most enriched by the differentially altered metabolites. The findings hold promise in developing strategies for early detection and novel therapies.


Asunto(s)
Neoplasias Colorrectales , Metabolómica , Humanos , Persona de Mediana Edad , Citratos , Ácido Cítrico , Arginina
2.
Curr Treat Options Oncol ; 25(3): 376-388, 2024 03.
Artículo en Inglés | MEDLINE | ID: mdl-38349502

RESUMEN

OPINION STATEMENT: Neoadjuvant chemotherapy is safe for patients with locally advanced colon cancer (LACC). The FOxTROT trial demonstrated a reduction in residual and recurrent cancer at 2 years with neoadjuvant chemotherapy for patients with cT3-4 LACC. Preoperative chemotherapy should be avoided, if possible, for patients with dMMR LACC, as over 50% of dMMR cancers have no pathologic response. Early universal testing of MMR status is critical to selecting the appropriate neoadjuvant therapy. Concerns about CT staging of LACC have limited uptake of neoadjuvant chemotherapy, as approximately 25% of patients with cT3-T4 cancer on CT have low-risk stage II disease. Development of CT criteria for malignant nodes should reduce the risk of over-staging. A multidisciplinary approach is needed to identify patients for neoadjuvant therapy. Neoadjuvant immunotherapy is safe and results in dramatic pathologic responses in patients with dMMR LACC. Longer follow-up is needed to determine if the exceptionally high pathologic response rates observed will translate into long-term remission. Remarkably, neoadjuvant immunotherapy has been found to cause major pathologic responses in a subset of patients with pMMR LACC, indicating the potential to cure more patients with this common cancer. Patients with cT4 LACC, whether stage II or III, have a substantial risk of recurrence despite adjuvant fluoropyrimidine plus oxaliplatin chemotherapy. We recommend neoadjuvant systemic therapy for all patients with cT4b LACC (dMMR and pMMR). Features of T4b disease are routinely reported by radiology. We use three cycles of FOLFOX chemotherapy for patients with cT4b pMMR LACC, due to the high rate of compliance and improvement in residual and recurrent disease. Patients with cT4b dMMR LACC should receive neoadjuvant immunotherapy, if there are no contraindications. Clinical trials of neoadjuvant therapy for LACC are of great interest and should provide training for radiologists to identify eligible patients. Results are anticipated from multiple ongoing trials of neoadjuvant chemotherapy, immunotherapy, and targeted therapy for pMMR LACC and immunotherapy for dMMR LACC.


Asunto(s)
Neoplasias Encefálicas , Neoplasias del Colon , Neoplasias Colorrectales , Recurrencia Local de Neoplasia , Síndromes Neoplásicos Hereditarios , Humanos , Pronóstico , Estadificación de Neoplasias , Recurrencia Local de Neoplasia/patología , Neoplasias del Colon/terapia , Neoplasias del Colon/tratamiento farmacológico , Terapia Neoadyuvante , Reparación de la Incompatibilidad de ADN
3.
JCO Oncol Pract ; 20(3): 378-385, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38190584

RESUMEN

PURPOSE: National Cancer Institute (NCI) and nonprofit organization (NPO) funding is critical for research and advocacy but may not be equitable across cancers. METHODS: This study evaluated funding from the NCI and NPOs supporting lung, breast, colorectal, pancreatic, hepatobiliary, prostate, ovarian, cervical and endometrial cancers, leukemia, lymphoma, and melanoma from 2015 to 2018. The primary objectives were to assess for funding disparities across different cancers compared with their incidence and mortality and across racial groups. We also determined if underfunding correlates with fewer clinical trials. Correlations between funding for each cancer and its incidence, mortality, and number of clinical trials were analyzed using descriptive statistics and Pearson correlation coefficients (CCs). RESULTS: Diseases with the largest combined NCI and NPO funding were breast cancer ($3.75 billion in US dollars [USD]) and leukemia ($1.99 billion USD). Those with the least funding were endometrial ($94 million USD), cervical ($292 million USD), and hepatobiliary cancers ($348 million USD). Disease-specific funding correlated well with incidence but correlated poorly with mortality (Pearson CCs, 0.74; P = .006 and .30, P = .346, respectively). Breast cancer, leukemia, and lymphoma were well-funded while colorectal, lung, hepatobiliary and uterine cancers were underfunded. Higher incidence among Black patients correlated with underfunding. The amount of funding for a particular cancer correlated strongly with the number of clinical trials for that disease (Pearson CC, 0.91; P < .0001). CONCLUSION: Many cancers with high incidence and mortality rates are underfunded. Cancers that affect Black patients at higher rates are also underfunded. Underfunding strongly correlates with fewer clinical trials, which could impede future advances in underfunded cancers.


Asunto(s)
Neoplasias de la Mama , Neoplasias Colorrectales , Leucemia , Linfoma , Masculino , Estados Unidos/epidemiología , Humanos , Incidencia , National Cancer Institute (U.S.)
4.
Cancer Med ; 12(6): 7327-7338, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36621839

RESUMEN

BACKGROUND: Young-onset gastrointestinal malignancies appear to be increasing in incidence. There are limited data on young-onset pancreaticobiliary adenocarcinoma (YO-PBA). METHODS: The study comprised patients with PBA (pancreatic adenocarcinoma, intra-, and extra-hepatic cholangiocarcinoma) and included in the National Cancer Database (NCDB) between 2004 and 2017. YO-PBA was defined as a diagnosis at age less than 50 years. Logistic regression to assess factors associated with YO-PBA status, and cox proportional hazards modeling to associate relevant factors with overall survival was performed. RESULTS: The study cohort comprised 360,764 patients, with 20,822 (5.8%) YO-PBA. YO-PBA was associated with (p-values<0.0001 for all): male sex (6.3% YO-male out of all male patients vs. 5.2% YO-female, OR 1.29, 95% CI 1.25-1.33), Black race (7.9% YO-Black vs. 5.0% YO-White, OR 1.72, 95% CI 1.64-1.80), lower income (6.4% YO-lowest household income based group vs. 5.5% highest, OR 1.08, 95% CI 1.03-1.13). YO-PBA were more likely to present with stage-IV disease (6.4% YO-Stage IV of all stage IV vs. 5.4% YO-Stage I-III, OR 1.25, 95% CI 1.21-1.29 p-value < 0.0001). Factors associated with overall survival (OS) in non-operable patients included-sex - male vs. female, HR 1.12 (95% CI 1.08-1.15); race - Black vs. White, HR 1.23 (95% CI 1.06-1.42); income group - lowest vs. highest, HR 1.33 (95% CI 1.27-1.39), and treatment center type - academic vs. nonacademic center, HR 0.87 (95% CI 0.85-0.90). CONCLUSIONS: Socioeconomic factors significantly impact incidence and outcomes for young-onset pancreaticobiliary adenocarcinoma (YO-PBA). More work is needed to help understand the mechanisms involved while addressing the disparities.


Asunto(s)
Adenocarcinoma , Edad de Inicio , Neoplasias Pancreáticas , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adenocarcinoma/epidemiología , Adenocarcinoma/terapia , Población Negra , Neoplasias Pancreáticas/epidemiología , Neoplasias Pancreáticas/terapia , Factores Socioeconómicos , Población Blanca
6.
JCO Oncol Pract ; 18(5): e759-e769, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35544654

RESUMEN

PURPOSE: The proportion of gastroesophageal junction adenocarcinoma is increasing. This study evaluated trends in early-onset gastric and esophageal cancers and compared socioeconomic and clinical characteristics between early-onset versus late-onset disease. MATERIALS AND METHODS: We included all patients with gastric and esophageal cancer from 2004 to 2015 from the National Cancer Database. Patients were categorized by age < 50, 50-69, and ≥ 70 years. Differences in pathologic and socioeconomic factors between early-onset and late-onset cancers were assessed by using chi-square test. The effects of demographic and socioeconomic factors on overall survival (OS) were assessed using Cox models. RESULTS: The proportion of patients with early-onset gastric cancer increased from 23.9% in 2004-2006 to 26.2% in 2013-2015, whereas the proportion of early-onset esophageal cancer decreased from 27.3% in 2004-2006 to 23.1% in 2013-2015. For both malignancies, the early-onset group was more likely to be Black or Hispanic and more likely to be diagnosed with stage IV cancer. Black patients had the worst median OS in both malignancies. In gastric cancer, within the Black patient group, patients experienced worse OS if they had government insurance versus private insurance (hazard ratio 1.2; 95% CI, 1.1 to 1.3; P value < .0001) or if they were in the lowest community median income category versus the highest category (hazard ratio 1.2; 95% CI, 1.1 to 1.3; P value < .0001). CONCLUSION: Early-onset gastric cancer is increasing, whereas early-onset esophageal cancer is declining. Early-onset gastric cancer disproportionately affects non-White patients, particularly Hispanic patients. Black patients have worse outcomes compared with other races for both gastric and esophageal cancer.


Asunto(s)
Adenocarcinoma , Neoplasias Esofágicas , Neoplasias Gástricas , Adenocarcinoma/epidemiología , Anciano , Neoplasias Esofágicas/epidemiología , Neoplasias Esofágicas/patología , Hispánicos o Latinos , Humanos , Factores Socioeconómicos , Neoplasias Gástricas/epidemiología
7.
Oncology (Williston Park) ; 36(2): 84-91, 2022 02 08.
Artículo en Inglés | MEDLINE | ID: mdl-35180340

RESUMEN

INTRODUCTION: Financial conflicts of interest (COIs) represent a common and complex issue in hematology and oncology. However, little is known about the timing of when COIs begin to develop during a career trajectory. We evaluated self-reported COIs for junior faculty members at top cancer centers to determine how these financial relationships correlated with measures of academic career productivity. METHODS: We analyzed data from 230 assistant professors at 10 academic cancer centers. Financial COIs were identified from the CMS Open Payments (Sunshine Act dollars) database. Self-reported COIs were obtained from American Society of Clinical Oncology (ASCO) and American Society of Hematology (ASH) disclosures, and from disclosures in recent publications. Number of publications and h-index (defined as the largest number of publications [h] such that h publications each have at least h citations) were used as measures of academic productivity. Scatter plots and Spearman correlation coefficients were used to assess the relationship between COIs or Sunshine Act dollars with number of publications and h-index. Linear regression modeling was used to analyze the relationships between COIs or Sunshine Act dollars with number of publications and h-index, adjusting for years of experience since completing fellowship (YSF). RESULTS: A total of 46% of junior faculty had at least 1 COI. Number of COIs reported to ASCO/ASH was positively correlated with total Sunshine Act dollars (Spearman correlation, 0.53; P <.01). The number of COIs and the number of Sunshine Act dollars increased with years in practice (Spearman correlation, 0.38 and 0.25, respectively; P <.01 for both). COIs and Sunshine Act dollars correlated with h-index (Spearman correlation, 0.41 and 0.37, respectively; both P <.01). After adjusting for YSF, linear regression demonstrated that log-transformed h-index and number of publications were associated with Sunshine Act dollars (both P <.01) and COIs (ASCO/ASH) (both P = .01). CONCLUSIONS: Financial COIs increased with number of YSF. Measures of academic productivity were positively correlated with COIs (ASCO/ASH) and Sunshine Act dollars. These data suggest that the cultivation of industry relationships is associated with the early academic productivity of junior faculty.


Asunto(s)
Conflicto de Intereses/economía , Docentes Médicos/estadística & datos numéricos , Hematología , Enfermería Oncológica , Publicaciones/estadística & datos numéricos , Centros Médicos Académicos , Investigación Biomédica/economía , Conflicto de Intereses/legislación & jurisprudencia , Estudios Transversales , Bases de Datos Factuales , Femenino , Humanos , Masculino , Factores de Tiempo , Estados Unidos
8.
Proc Natl Acad Sci U S A ; 119(4)2022 01 25.
Artículo en Inglés | MEDLINE | ID: mdl-35064087

RESUMEN

Pancreatic ductal adenocarcinoma (PDAC) is associated with extensive dysregulation of the epigenome and epigenetic regulators, such as bromodomain and extraterminal motif (BET) proteins, have been suggested as potential targets for therapy. However, single-agent BET inhibition has shown poor efficacy in clinical trials, and no epigenetic approaches are currently used in PDAC. To circumvent the limitations of the current generation of BET inhibitors, we developed the compound XP-524 as an inhibitor of the BET protein BRD4 and the histone acetyltransferase EP300/CBP, both of which are ubiquitously expressed in PDAC tissues and cooperate to enhance tumorigenesis. XP-524 showed increased potency and superior tumoricidal activity than the benchmark BET inhibitor JQ-1 in vitro, with comparable efficacy to higher-dose JQ-1 combined with the EP300/CBP inhibitor SGC-CBP30. We determined that this is in part due to the epigenetic silencing of KRAS in vitro, with similar results observed using ex vivo slice cultures of human PDAC tumors. Accordingly, XP-524 prevented KRAS-induced, neoplastic transformation in vivo and extended survival in two transgenic mouse models of aggressive PDAC. In addition to the inhibition of KRAS/MAPK signaling, XP-524 also enhanced the presentation of self-peptide and tumor recruitment of cytotoxic T lymphocytes, though these lymphocytes remained refractory from full activation. We, therefore, combined XP-524 with an anti-PD-1 antibody in vivo, which reactivated the cytotoxic immune program and extended survival well beyond XP-524 in monotherapy. Pending a comprehensive safety evaluation, these results suggest that XP-524 may benefit PDAC patients and warrant further exploration, particularly in combination with immune checkpoint inhibition.


Asunto(s)
Antineoplásicos/farmacología , Proteína p300 Asociada a E1A/antagonistas & inhibidores , Inhibidores de Puntos de Control Inmunológico/farmacología , Proteínas/antagonistas & inhibidores , Proteínas Proto-Oncogénicas p21(ras)/antagonistas & inhibidores , Animales , Antineoplásicos/química , Proteínas de Ciclo Celular/genética , Proteínas de Ciclo Celular/metabolismo , Línea Celular Tumoral , Modelos Animales de Enfermedad , Sinergismo Farmacológico , Proteína p300 Asociada a E1A/química , Regulación de la Expresión Génica , Humanos , Estimación de Kaplan-Meier , Ratones , Modelos Moleculares , Conformación Molecular , Estructura Molecular , Receptor de Muerte Celular Programada 1/antagonistas & inhibidores , Proteínas Proto-Oncogénicas p21(ras)/química , Relación Estructura-Actividad , Factores de Transcripción/genética , Factores de Transcripción/metabolismo , Resultado del Tratamiento , Ensayos Antitumor por Modelo de Xenoinjerto
9.
Pharmacol Ther ; 236: 108111, 2022 08.
Artículo en Inglés | MEDLINE | ID: mdl-35016920

RESUMEN

Immune checkpoint inhibitors (ICIs) have transformed the treatment paradigm for several malignancies. While the use of single-agent or combined ICIs has achieved acceptable disease control rates in a variety of solid tumors, such approaches have yet to show substantial therapeutic efficacy in select difficult-to-treat cancer types. Recently, select chemotherapy regimens are emerging as extensive modifiers of the tumor microenvironment, leading to the reprogramming of local immune responses. Accordingly, data is now emerging to suggest that certain anti-neoplastic agents modulate various immune cell processes, most notably the cross-presentation of tumor antigens, leukocyte trafficking, and cytokine biosynthesis. As such, the combination of ICIs and cytotoxic chemotherapy are beginning to show promise in many cancers that have long been considered poorly responsive to ICI-based immunotherapy. Here, we discuss past and present attempts to advance chemo-immunotherapy in these difficult-to-treat cancer histologies, mechanisms through which select chemotherapies modify tumor immunogenicity, as well as important considerations when designing such approaches to maximize efficacy and improve therapeutic response rates.


Asunto(s)
Antineoplásicos , Neoplasias , Antígenos de Neoplasias , Antineoplásicos/farmacología , Antineoplásicos/uso terapéutico , Humanos , Factores Inmunológicos/farmacología , Inmunoterapia , Neoplasias/tratamiento farmacológico , Microambiente Tumoral
10.
Cancer Med ; 10(21): 7542-7550, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34647438

RESUMEN

BACKGROUND: The incidence of colorectal cancer (CRC) in patients under age 50 is rising for unclear reasons. We examined the effects of socioeconomic factors on outcomes for patients with early-onset CRC compared to late-onset CRC. METHODS: Patients with CRC from 2004 to 2015 in the National Cancer Database were included and categorized by age (under or over 50 years). Differences in demographic and socioeconomic factors, disease characteristics, and survival outcomes between early-onset versus late-onset CRC patients were assessed by Chi-squared test and Cox models. RESULTS: The study population included 1,061,204 patients, 108,058 (10.2%) of whom were under age 50. The proportion of patients diagnosed under age 50 increased over time: 9.4% in 2004-2006, 10.1% in 2007-2009, 10.5% in 2010-2012, and 10.7% in 2013-2015 (p < 0.0001). Early-onset CRC patients were more likely to be Black (15.1% vs. 11.3%) or Hispanic (8.6% vs. 4.6%) and to present with stage 4 disease (24.9% vs. 17.0%), p < 0.0001 for all. Black patients had the worst median OS (58.3 months) compared to White (67.0 months), Hispanic (91.6 months), or Asian (104.9 months) patients, p < 0.0001. Within the subgroup of early-onset CRC patients with private insurance, Black patients had worse OS compared to White patients, even in communities with higher income and education status. CONCLUSIONS: Early-onset CRC continues to increase. Patients with early-onset CRC are more likely to be Black or Hispanic and to present with stage 4 cancer. Early-onset Black patients showed worse OS compared to White patients in all income subgroups, even with private insurance.


Asunto(s)
Neoplasias Colorrectales/etnología , Neoplasias Colorrectales/epidemiología , Factores Raciales , Clase Social , Edad de Inicio , Anciano , Pueblo Asiatico/estadística & datos numéricos , Población Negra/estadística & datos numéricos , Neoplasias Colorrectales/mortalidad , Escolaridad , Femenino , Hispánicos o Latinos/estadística & datos numéricos , Humanos , Incidencia , Renta , Cobertura del Seguro , Seguro de Salud , Masculino , Persona de Mediana Edad , Tasa de Supervivencia , Estados Unidos/epidemiología , Población Blanca/estadística & datos numéricos
11.
BMJ Case Rep ; 14(6)2021 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-34158333

RESUMEN

While half of the metastatic clear cell renal cell carcinomas (ccRCCs) involve the lungs, metastatic lesions have been described in various other organs, including glandular tissues such as the pancreas. Recent evidence suggests that ccRCC lesions affecting the pancreas are poorly responsive to immune checkpoint inhibition (ICI) but show superior responses to tyrosine kinase inhibitors (TKIs) targeting the vascular endothelial growth factor (VEGF) signalling pathway. However, this has yet to be explored in ccRCC spreading to other glandular tissues. Here we present two cases of ccRCC with glandular metastases, the first to the pancreas and the second to the parotid gland. In both patients, ICI-based immunotherapy offered minimal clinical benefit, but both had durable responses to angiogenesis inhibitors. Given the anatomic similarity between the pancreas and parotid glands, ccRCC with involvement of the parotid gland may also benefit from VEGF-targeting TKIs as opposed to ICIs.


Asunto(s)
Carcinoma de Células Renales , Inhibidores de Puntos de Control Inmunológico/uso terapéutico , Neoplasias Renales , Neoplasias Pancreáticas/secundario , Neoplasias de la Parótida/secundario , Inhibidores de la Angiogénesis/uso terapéutico , Carcinoma de Células Renales/tratamiento farmacológico , Carcinoma de Células Renales/patología , Humanos , Neoplasias Renales/tratamiento farmacológico , Neoplasias Renales/patología , Factor A de Crecimiento Endotelial Vascular
12.
Cancer Lett ; 504: 1-14, 2021 04 28.
Artículo en Inglés | MEDLINE | ID: mdl-33549709

RESUMEN

Immunotherapy has revolutionized cancer treatment in the last decade, and strategies to re-activate cytotoxic immunity are now standard of care in several malignancies. Despite rapid advances in immunotherapy for most solid cancers, progress in immunotherapy against pancreatic ductal adenocarcinoma (PDAC) has been exceptionally difficult. This is true for several approaches, most notably immune checkpoint inhibitors (ICIs) and GM-CSF cell-based vaccines (GVAX). Though many immunotherapies have been explored in clinical trials, few have shown significant therapeutic efficacy. Further, many have shown high rates of serious adverse effects and dose-limiting toxicities, and to date, immunotherapy regimens have not been successfully implemented in PDAC. Here, we provide a comprehensive summary of the key clinical trials exploring immunotherapy in PDAC, followed by a brief discussion of emerging molecular mechanisms that may explain the relative failure of immunotherapy in pancreas cancer thus far.


Asunto(s)
Carcinoma Ductal Pancreático/terapia , Inmunoterapia , Neoplasias Pancreáticas/terapia , Carcinoma Ductal Pancreático/radioterapia , Terapia Combinada , Humanos , Neoplasias Pancreáticas/radioterapia
13.
Oncologist ; 25(4): 301-305, 2020 04.
Artículo en Inglés | MEDLINE | ID: mdl-32297440

RESUMEN

Thymomas comprise a group of rare epithelial neoplasms of the anterior mediastinum. Whereas localized disease carries a favorable prognosis, the majority of patients with metastatic thymomas experience progression or recurrence over a 10-year period. Although targeted therapies have become standard of care in many malignancies, no clinically actionable mutations have consistently been identified in metastatic thymomas. Here, we describe a patient with an aggressive thymoma complicated by extensive pleural metastases. Over a 16-year period, she progressed on multiple treatment regimens. To identify additional treatment options, tissue from a pleural metastasis was sent for next-generation sequencing, revealing mutations in BRCA2, tyrosine kinase 2, and SET domain containing 2. Based on supporting evidence for poly (ADP-ribose) polymerase (PARP) inhibition in other BRCA-mutated tumors, the patient was started on the PARP inhibitor olaparib. She derived significant clinical benefit from treatment, with imaging showing overall stabilization of her disease. Here, we review the genotyping results of her tumor and discuss the functional and clinical significance of the mutations in her cancer as well as implications for managing patients with advanced BRCA-mutant thymomas. KEY POINTS: Targeted therapy has yet to enter the standard clinical management of metastatic thymomas. Patients with BRCA2-mutant thymomas may benefit from poly (ADP-ribose) polymerase inhibition.


Asunto(s)
Neoplasias Ováricas , Timoma , Neoplasias del Timo , Proteína BRCA1/genética , Proteína BRCA2/genética , Femenino , Humanos , Mutación , Recurrencia Local de Neoplasia , Ftalazinas/uso terapéutico , Piperazinas , Timoma/tratamiento farmacológico , Timoma/genética , Neoplasias del Timo/tratamiento farmacológico , Neoplasias del Timo/genética
14.
Cancer Res ; 80(15): 3101-3115, 2020 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-32238357

RESUMEN

Pancreatic ductal adenocarcinoma (PDAC) is a leading cause of cancer-related death with a median survival time of 6-12 months. Most patients present with disseminated disease and the majority are offered palliative chemotherapy. With no approved treatment modalities for patients who progress on chemotherapy, we explored the effects of long-term gemcitabine administration on the tumor microenvironment to identify potential therapeutic options for chemorefractory PDAC. Using a combination of mouse models, primary cell line-derived xenografts, and established tumor cell lines, we first evaluated chemotherapy-induced alterations in the tumor secretome and immune surface proteins by high throughput proteomic arrays. In addition to enhancing antigen presentation and immune checkpoint expression, gemcitabine consistently increased the synthesis of CCL/CXCL chemokines and TGFß-associated signals. These secreted factors altered the composition of the tumor stroma, conferring gemcitabine resistance to cancer-associated fibroblasts in vitro and further enhancing TGFß1 biosynthesis. Combined gemcitabine and anti-PD-1 treatment in transgenic models of murine PDAC failed to alter disease course unless mice also underwent genetic or pharmacologic ablation of TGFß signaling. In the setting of TGFß signaling deficiency, gemcitabine and anti-PD-1 led to a robust CD8+ T-cell response and decrease in tumor burden, markedly enhancing overall survival. These results suggest that gemcitabine successfully primes PDAC tumors for immune checkpoint inhibition by enhancing antigen presentation only following disruption of the immunosuppressive cytokine barrier. Given the current lack of third-line treatment options, this approach warrants consideration in the clinical management of gemcitabine-refractory PDAC. SIGNIFICANCE: These data suggest that long-term treatment with gemcitabine leads to extensive reprogramming of the pancreatic tumor microenvironment and that patients who progress on gemcitabine-based regimens may benefit from multidrug immunotherapy.See related commentary by Carpenter et al., p. 3070 GRAPHICAL ABSTRACT: http://cancerres.aacrjournals.org/content/canres/80/15/3101/F1.large.jpg.


Asunto(s)
Carcinoma Ductal Pancreático , Neoplasias Pancreáticas , Animales , Carcinoma Ductal Pancreático/tratamiento farmacológico , Carcinoma Ductal Pancreático/genética , Línea Celular Tumoral , Desoxicitidina/análogos & derivados , Humanos , Inmunoterapia , Ratones , Neoplasias Pancreáticas/tratamiento farmacológico , Neoplasias Pancreáticas/genética , Proteómica , Microambiente Tumoral , Gemcitabina
15.
Int J Vasc Med ; 2020: 6582742, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32089887

RESUMEN

BACKGROUND: The role for inferior vena cava (IVC) filters in the oncology population is poorly defined. OBJECTIVES: Our primary endpoint was to determine the rate of filter placement in cancer patients without an absolute contraindication to anticoagulation and the rate of recurrent VTE after filter placement in both retrievable and permanent filter groups. Patients/. METHODS: A single-institution, retrospective study of patients with active malignancies and acute VTE who received a retrievable or permanent IVC filter between 2009-2013. Demographics and outcomes were confirmed on independent chart review. Cost data were obtained using Current Procedural Terminology (CPT) codes. RESULTS: 179 patients with retrievable filters and 207 patients with permanent filters were included. Contraindication to anticoagulation was the most cited reason for filter placement; however, only 76% of patients with retrievable filters and 69% of patients with permanent filters had an absolute contraindication to anticoagulation. 20% of patients with retrievable filters and 24% of patients with permanent filters had recurrent VTE. The median time from filter placement to death was 8.9 and 3.2 months in the retrievable and permanent filter groups, respectively. The total cost of retrievable filters and permanent filters was $2,883,389 and $3,722,688, respectively. CONCLUSIONS: The role for IVC filters in cancer patients remains unclear as recurrent VTE is common and time from filter placement to death is short. Filter placement is costly and has a clinically significant complication rate, especially for retrievable filters. More data from prospective, randomized trials are needed to determine the utility of IVC filters in cancer patients.

16.
Oncologist ; 25(5): e808-e815, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-31740568

RESUMEN

BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) remains resistant to chemotherapy and immunotherapy individually because of its desmoplastic stroma and immunosuppressive tumor microenvironment. Synergizing cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) immune checkpoint blockade with chemotherapy could overcome these barriers. Here we present results of a phase Ib trial combining ipilimumab and gemcitabine in advanced PDAC. MATERIALS AND METHODS: This was a single-institution study with a 3 + 3 dose-escalation design. The primary objective was to determine the maximum tolerated dose (MTD). Secondary objectives included determining the toxicity profile, objective response rate (ORR), median progression-free survival (PFS), and overall survival (OS). RESULTS: Twenty-one patients were enrolled, 13 during dose escalation and 8 at the MTD. The median age was 66 years, 62% were female, 95% had stage IV disease, and 67% had received at least one prior line of therapy. The primary objective to establish the MTD was achieved at doses of ipilimumab 3 mg/kg and gemcitabine 1,000 mg/m2 . The most common grade 3 or 4 adverse events were anemia (48%), leukopenia (48%), and neutropenia (43%). The ORR was 14% (3/21), and seven patients had stable disease. Median response duration for the three responders was 11 months, with one response duration of 19.8 months. Median PFS was 2.78 months (95% confidence interval [CI], 1.61-4.83 months), and median OS was 6.90 months (95% CI, 2.63-9.57 months). CONCLUSION: Gemcitabine and ipilimumab is a safe and tolerable regimen for PDAC with a similar response rate to gemcitabine alone. As in other immunotherapy trials, responses were relatively durable in this study. IMPLICATIONS FOR PRACTICE: Gemcitabine and ipilimumab is a safe and feasible regimen for treating advanced pancreatic cancer. Although one patient in this study had a relatively durable response of nearly 20 months, adding ipilimumab to gemcitabine does not appear to be more effective than gemcitabine alone in advanced pancreatic cancer.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica , Neoplasias Pancreáticas , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Desoxicitidina/análogos & derivados , Desoxicitidina/uso terapéutico , Femenino , Humanos , Ipilimumab/uso terapéutico , Masculino , Neoplasias Pancreáticas/tratamiento farmacológico , Microambiente Tumoral , Gemcitabina
17.
J Natl Compr Canc Netw ; 17(7): 849-854, 2019 07 01.
Artículo en Inglés | MEDLINE | ID: mdl-31319386

RESUMEN

BACKGROUND: Nonprofit organizations (NPOs) in oncology are vital for patient advocacy and funding research for rare cancers, young investigators, and innovative projects. However, some cancers may be underfunded relative to their burden. This study examined the alignment of cancer burden by histology with NPO funding for each histology. PATIENTS AND METHODS: This nationwide, cross-sectional study conducted from October 2017 through February 2018 included all oncology NPOs with >$5 million in annual revenue. Total revenue from NPOs supporting individual cancer types with the incidence, mortality, and person-years of life lost (PYLL) for each cancer type was compared using scatter plots and Pearson correlation coefficients. Correlation of expenditure types (eg, fundraising, patient education) with revenue was assessed using Pearson correlation coefficients. Effect of disease association with a stigmatized behavior (eg, lung cancer and smoking) was evaluated using descriptive statistics. RESULTS: A total of 119 cancer-related NPOs were included, generating approximately $6 billion in annual revenue in 2015. Cancers with the largest revenue were breast cancer ($460 million; 33.2%), leukemia ($201 million; 14.5%), pediatric cancers ($177 million; 12.8%), and lymphoma ($145 million; 10.5%). Breast cancer, leukemia, lymphoma, and pediatric cancers were all well funded compared with their incidence, mortality, and PYLL. Gastrointestinal (colorectal, pancreas, and hepatobiliary), gynecologic (ovarian, cervical, and endometrial), brain, and lung cancers were poorly funded in all 3 metrics. All cancers associated with a stigmatized behavior were poorly funded in at least 2 metrics. Increased spending on fundraising, administrative costs, patient education, and treatment was highly correlated with increased revenue (Pearson correlation coefficients all >0.92). CONCLUSIONS: NPO funding by cancer type is not proportionate with individual cancer burden on society. Disease stigma negatively impacts funding. A significant need exists to increase awareness and funding for many undersupported but common and highly lethal cancers.


Asunto(s)
Neoplasias/epidemiología , Carga Tumoral , Investigación Biomédica , Estudios Transversales , Femenino , Humanos , Masculino , Neoplasias/clasificación , Neoplasias/patología
20.
Oxf Med Case Reports ; 2019(12): 507-509, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31908823

RESUMEN

A 61-year-old man presented to the oncology clinic with Gleason 9 (4 + 5) prostate cancer. Staging CT showed multiple nodules in both lungs. Since the lung lesions were too small for biopsy, he was started on anti-androgen therapy for suspected metastatic, hormone-sensitive prostate cancer. While his prostate-specific antigen decreased from 32 to <0.1 ng/ml, the multiple lung lesions showed no response on subsequent imaging. The patient presented during follow-up with severe right leg pain, at which time magnetic resonance imaging revealed a large, hyperintense mass in the femur. The mass was resected along with two lung nodules, with pathology demonstrating metastatic alveolar soft part sarcoma. This serves as an important reminder that lesions suspicious for metastases may be due to cancers of multiple primary origins, particularly if the pattern of metastasis is atypical or there is varied response to therapy.

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