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1.
Cell ; 186(9): 1824-1845, 2023 04 27.
Artigo em Inglês | MEDLINE | ID: mdl-37116469

RESUMO

Cachexia, a systemic wasting condition, is considered a late consequence of diseases, including cancer, organ failure, or infections, and contributes to significant morbidity and mortality. The induction process and mechanistic progression of cachexia are incompletely understood. Refocusing academic efforts away from advanced cachexia to the etiology of cachexia may enable discoveries of new therapeutic approaches. Here, we review drivers, mechanisms, organismal predispositions, evidence for multi-organ interaction, model systems, clinical research, trials, and care provision from early onset to late cachexia. Evidence is emerging that distinct inflammatory, metabolic, and neuro-modulatory drivers can initiate processes that ultimately converge on advanced cachexia.


Assuntos
Caquexia , Humanos , Caquexia/tratamento farmacológico , Caquexia/etiologia , Caquexia/metabolismo , Caquexia/patologia , Músculo Esquelético/metabolismo , Neoplasias/complicações , Neoplasias/metabolismo , Neoplasias/patologia , Infecções/complicações , Infecções/patologia , Insuficiência de Múltiplos Órgãos/complicações , Insuficiência de Múltiplos Órgãos/patologia
2.
Proc Natl Acad Sci U S A ; 119(4)2022 01 25.
Artigo em Inglês | MEDLINE | ID: mdl-35046049

RESUMO

Cancer immunotherapy frequently fails because most carcinomas have few T cells, suggesting that cancers can suppress T cell infiltration. Here, we show that cancer cells of human pancreatic ductal adenocarcinoma (PDA), colorectal cancer, and breast cancer are coated with transglutaminase-2 (TGM2)-dependent covalent CXCL12-keratin-19 (KRT19) heterodimers that are organized as filamentous networks. Since a dimeric form of CXCL12 suppresses the motility of human T cells, we determined whether this polymeric CXCL12-KRT19 coating mediated T cell exclusion. Mouse tumors containing control PDA cells exhibited the CXCL12-KRT19 coating, excluded T cells, and did not respond to treatment with anti-PD-1 antibody. Tumors containing PDA cells not expressing either KRT19 or TGM2 lacked the CXCL12-KRT19 coating, were infiltrated with activated CD8+ T cells, and growth was suppressed with anti-PD-1 antibody treatment. Thus, carcinomas assemble a CXCL12-KRT19 coating to evade cancer immune attack.


Assuntos
Carcinoma/etiologia , Carcinoma/metabolismo , Quimiocina CXCL12/metabolismo , Citotoxicidade Imunológica , Queratina-19/metabolismo , Linfócitos T/imunologia , Linfócitos T/metabolismo , Animais , Neoplasias da Mama , Carcinoma/patologia , Linhagem Celular Tumoral , Quimiocina CXCL12/química , Feminino , Humanos , Queratina-19/química , Masculino , Camundongos , Repetições de Microssatélites , Neoplasias Pancreáticas , Ligação Proteica , Multimerização Proteica , Neoplasias Pancreáticas
3.
J Pathol ; 259(4): 415-427, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36641763

RESUMO

CRISPR/Cas9-driven cancer modeling studies are based on the disruption of tumor suppressor genes by small insertions or deletions (indels) that lead to frame-shift mutations. In addition, CRISPR/Cas9 is widely used to define the significance of cancer oncogenes and genetic dependencies in loss-of-function studies. However, how CRISPR/Cas9 influences gain-of-function oncogenic mutations is elusive. Here, we demonstrate that single guide RNA targeting exon 3 of Ctnnb1 (encoding ß-catenin) results in exon skipping and generates gain-of-function isoforms in vivo. CRISPR/Cas9-mediated exon skipping of Ctnnb1 induces liver tumor formation in synergy with YAPS127A in mice. We define two distinct exon skipping-induced tumor subtypes with different histological and transcriptional features. Notably, ectopic expression of two exon-skipped ß-catenin transcript isoforms together with YAPS127A phenocopies the two distinct subtypes of liver cancer. Moreover, we identify similar CTNNB1 exon-skipping events in patients with hepatocellular carcinoma. Collectively, our findings advance our understanding of ß-catenin-related tumorigenesis and reveal that CRISPR/Cas9 can be repurposed, in vivo, to study gain-of-function mutations of oncogenes in cancer. © 2023 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of The Pathological Society of Great Britain and Ireland.


Assuntos
Carcinoma Hepatocelular , Neoplasias Hepáticas , Animais , Camundongos , beta Catenina/genética , Carcinogênese/genética , Carcinoma Hepatocelular/genética , Éxons/genética , Neoplasias Hepáticas/genética
4.
Proc Natl Acad Sci U S A ; 117(46): 28960-28970, 2020 11 17.
Artigo em Inglês | MEDLINE | ID: mdl-33127761

RESUMO

Inhibition of the chemokine receptor CXCR4 in combination with blockade of the PD-1/PD-L1 T cell checkpoint induces T cell infiltration and anticancer responses in murine and human pancreatic cancer. Here we elucidate the mechanism by which CXCR4 inhibition affects the tumor immune microenvironment. In human immune cell-based chemotaxis assays, we find that CXCL12-stimulated CXCR4 inhibits the directed migration mediated by CXCR1, CXCR3, CXCR5, CXCR6, and CCR2, respectively, chemokine receptors expressed by all of the immune cell types that participate in an integrated immune response. Inhibiting CXCR4 in an experimental cancer medicine study by 1-wk continuous infusion of the small-molecule inhibitor AMD3100 (plerixafor) induces an integrated immune response that is detected by transcriptional analysis of paired biopsies of metastases from patients with microsatellite stable colorectal and pancreatic cancer. This integrated immune response occurs in three other examples of immune-mediated damage to noninfected tissues: Rejecting renal allografts, melanomas clinically responding to anti-PD1 antibody therapy, and microsatellite instable colorectal cancers. Thus, signaling by CXCR4 causes immune suppression in human pancreatic ductal adenocarcinoma and colorectal cancer by impairing the function of the chemokine receptors that mediate the intratumoral accumulation of immune cells.


Assuntos
Neoplasias Colorretais/metabolismo , Imunidade/imunologia , Pâncreas/metabolismo , Neoplasias Pancreáticas/metabolismo , Receptores CXCR4/efeitos dos fármacos , Receptores CXCR4/metabolismo , Idoso , Benzilaminas , Carcinoma Ductal Pancreático , Quimiocina CXCL12 , Neoplasias Colorretais/patologia , Ciclamos , Feminino , Compostos Heterocíclicos/antagonistas & inibidores , Humanos , Imunoterapia , Masculino , Pessoa de Meia-Idade , Neoplasias Pancreáticas/patologia , Receptores CCR2/metabolismo , Receptores CXCR3/metabolismo , Receptores CXCR5/metabolismo , Receptores CXCR6/metabolismo , Receptores de Interleucina-8A/metabolismo , Transdução de Sinais/efeitos dos fármacos , Microambiente Tumoral/imunologia , Neoplasias Pancreáticas
5.
Gut ; 71(5): 879-888, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-35144974

RESUMO

OBJECTIVE: We assessed whether famotidine improved inflammation and symptomatic recovery in outpatients with mild to moderate COVID-19. DESIGN: Randomised, double-blind, placebo-controlled, fully remote, phase 2 clinical trial (NCT04724720) enrolling symptomatic unvaccinated adult outpatients with confirmed COVID-19 between January 2021 and April 2021 from two US centres. Patients self-administered 80 mg famotidine (n=28) or placebo (n=27) orally three times a day for 14 consecutive days. Endpoints were time to (primary) or rate of (secondary) symptom resolution, and resolution of inflammation (exploratory). RESULTS: Of 55 patients in the intention-to-treat group (median age 35 years (IQR: 20); 35 women (64%); 18 African American (33%); 14 Hispanic (26%)), 52 (95%) completed the trial, submitting 1358 electronic symptom surveys. Time to symptom resolution was not statistically improved (p=0.4). Rate of symptom resolution was improved for patients taking famotidine (p<0.0001). Estimated 50% reduction of overall baseline symptom scores were achieved at 8.2 days (95% CI: 7 to 9.8 days) for famotidine and 11.4 days (95% CI: 10.3 to 12.6 days) for placebo treated patients. Differences were independent of patient sex, race or ethnicity. Five self-limiting adverse events occurred (famotidine, n=2 (40%); placebo, n=3 (60%)). On day 7, fewer patients on famotidine had detectable interferon alpha plasma levels (p=0.04). Plasma immunoglobulin type G levels to SARS-CoV-2 nucleocapsid core protein were similar between both arms. CONCLUSIONS: Famotidine was safe and well tolerated in outpatients with mild to moderate COVID-19. Famotidine led to earlier resolution of symptoms and inflammation without reducing anti-SARS-CoV-2 immunity. Additional randomised trials are required.


Assuntos
Tratamento Farmacológico da COVID-19 , Famotidina , Adulto , Método Duplo-Cego , Famotidina/uso terapêutico , Feminino , Humanos , Inflamação , SARS-CoV-2 , Resultado do Tratamento
6.
Br J Cancer ; 125(2): 149-151, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33772153

RESUMO

A recent Phase 1 clinical study of the immunological effects of inhibiting the chemokine receptor, CXCR4, in patients with pancreatic ductal adenocarcinoma or colorectal cancer suggests that stimulation of CXCR4 on immune cells suppresses the intratumoural immune reaction. Here, we discuss how CXCR4 mediates this response, and how cancer cells elicit it.


Assuntos
Neoplasias Colorretais , Compostos Heterocíclicos , Neoplasias Pancreáticas , Benzilaminas , Quimiocina CXCL12 , Ciclamos , Mobilização de Células-Tronco Hematopoéticas , Humanos , Receptores CXCR4
7.
J Hepatol ; 75(4): 879-887, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34052255

RESUMO

BACKGROUND & AIMS: Sorafenib has been the standard of care for patients with advanced hepatocellular carcinoma and although immunotherapeutic approaches are now challenging this position, it retains an advantage in HCV-seropositive patients. We aimed to quantify the rate of tumour progression in patients receiving sorafenib and relate this figure to survival, both overall, and according to viral status. METHODS: Using serial data from an international clinical trial we applied a joint model to combine survival and progression over time in order to estimate the rate of tumour growth as assessed by tumour burden and serum alpha-fetoprotein, and the impact of treatment on liver function. RESULTS: High tumour burden at baseline was associated with an increased risk of death. In patients still alive at the end of the study, the progression in relation to tumour burden was very low compared to those who died within the study. Overall, the change in mean tumour burden was 0.12 mm per day or an absolute growth rate of 3.6 mm/month. Median doubling time was 665 days. For those who progressed above 0.12 mm per day or the 12% rate, median survival was 234 days compared to 384 days if the rate was below 12%. Tumour growth rate and serum alpha-fetoprotein rise were significantly lower in those who were HCV seropositive as was the rate of decline in liver function. These results were replicated in 2 independent patient groups. CONCLUSION: Our analysis suggests that sorafenib treatment is associated with improved survival in patients with advanced hepatocellular carcinoma mainly by decreasing the rate of tumour growth and liver function deterioration among patients with HCV infection. LAY SUMMARY: Among patients receiving sorafenib for advanced hepatocellular carcinoma the rate of tumour growth (as assessed by changes in tumour size and the biomarker alpha-fetoprotein) and the deterioration of liver function is less in those who have the hepatitis C virus, than in those who do not.


Assuntos
Crescimento e Desenvolvimento/efeitos dos fármacos , Hepatite C/complicações , Neoplasias Hepáticas/tratamento farmacológico , Sorafenibe/farmacologia , Adulto , Idoso , Carcinoma Hepatocelular/tratamento farmacológico , Carcinoma Hepatocelular/fisiopatologia , Feminino , Hepatite C/tratamento farmacológico , Humanos , Fígado/patologia , Testes de Função Hepática/métodos , Testes de Função Hepática/estatística & dados numéricos , Neoplasias Hepáticas/fisiopatologia , Masculino , Pessoa de Meia-Idade , Sorafenibe/uso terapêutico
8.
Oncologist ; 26(4): 269-273, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33465258

RESUMO

Whether the immune suppressive action of glucocorticoid steroids, such as dexamethasone, might reduce the benefits of cancer immunotherapy has long been a concern. Observations that established tumor regressions in response to immune checkpoint inhibitors (ICIs) often persist, despite the use of steroids to mitigate ICI-related autoimmune breakthrough, are not sufficiently reassuring, because these observations do not address the potential blunting of immune priming at the initiation of ICI therapy. With increasing indications for ICI in combination with chemotherapy, this issue merits reconsideration. Professional society guidance advises that dexamethasone should be used as first-line prophylaxis for nausea and vomiting in patients receiving ICI and highly emetogenic chemotherapy combination regimens. Here, we review the availability of data on this subject and propose an alternative approach focused on the adoption of steroid minimization or sparing for prophylaxis of nausea until the underlying immune biology is better understood.


Assuntos
Antieméticos , Antineoplásicos , Neoplasias , Antieméticos/uso terapêutico , Antineoplásicos/uso terapêutico , Dexametasona/uso terapêutico , Humanos , Imunoterapia/efeitos adversos , Náusea/tratamento farmacológico , Neoplasias/tratamento farmacológico , Vômito/tratamento farmacológico
9.
Gut ; 69(9): 1592-1597, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32499303

RESUMO

OBJECTIVE: Treatment options for non-hospitalised patients with coronavirus disease 2019 (COVID-19) to reduce morbidity, mortality and spread of the disease are an urgent global need. The over-the-counter histamine-2 receptor antagonist famotidine is a putative therapy for COVID-19. We quantitively assessed longitudinal changes in patient reported outcome measures in non-hospitalised patients with COVID-19 who self-administered high-dose famotidine orally. DESIGN: Patients were enrolled consecutively after signing written informed consent. Data on demographics, COVID-19 diagnosis, famotidine use, drug-related side effects, temperature measurements, oxygen saturations and symptom scores were obtained using questionnaires and telephone interviews. Based on a National Institute of Health (NIH)-endorsed Protocol to research Patient Experience of COVID-19, we collected longitudinal severity scores of five symptoms (cough, shortness of breath, fatigue, headaches and anosmia) and general unwellness on a four-point ordinal scale modelled on performance status scoring. All data are reported at the patient level. Longitudinal combined normalised symptom scores were statistically compared. RESULTS: Ten consecutive patients with COVID-19 who self-administered high-dose oral famotidine were identified. The most frequently used famotidine regimen was 80 mg three times daily (n=6) for a median of 11 days (range: 5-21 days). Famotidine was well tolerated. All patients reported marked improvements of disease related symptoms after starting famotidine. The combined symptom score improved significantly within 24 hours of starting famotidine and peripheral oxygen saturation (n=2) and device recorded activity (n=1) increased. CONCLUSIONS: The results of this case series suggest that high-dose oral famotidine is well tolerated and associated with improved patient-reported outcomes in non-hospitalised patients with COVID-19.


Assuntos
Infecções por Coronavirus , Monitoramento de Medicamentos/métodos , Famotidina/administração & dosagem , Pandemias , Pneumonia Viral , Avaliação de Sintomas/métodos , Adulto , Betacoronavirus/isolamento & purificação , COVID-19 , Infecções por Coronavirus/diagnóstico , Infecções por Coronavirus/tratamento farmacológico , Infecções por Coronavirus/fisiopatologia , Relação Dose-Resposta a Droga , Feminino , Antagonistas dos Receptores H2 da Histamina/administração & dosagem , Humanos , Masculino , Pessoa de Meia-Idade , Oximetria/métodos , Medidas de Resultados Relatados pelo Paciente , Pneumonia Viral/diagnóstico , Pneumonia Viral/tratamento farmacológico , Pneumonia Viral/fisiopatologia , Estudos Retrospectivos , SARS-CoV-2 , Autoadministração , Resultado do Tratamento
10.
Mol Med ; 26(1): 91, 2020 09 29.
Artigo em Inglês | MEDLINE | ID: mdl-32993479

RESUMO

BACKGROUND: Mechanically ventilated patients with COVID-19 have a mortality of 24-53%, in part due to distal mucopurulent secretions interfering with ventilation. DNA from neutrophil extracellular traps (NETs) contribute to the viscosity of mucopurulent secretions and NETs are found in the serum of COVID-19 patients. Dornase alfa is recombinant human DNase 1 and is used to digest DNA in mucoid sputum. Here, we report a single-center case series where dornase alfa was co-administered with albuterol through an in-line nebulizer system. METHODS: Demographic and clinical data were collected from the electronic medical records of five mechanically ventilated patients with COVID-19-including three requiring veno-venous extracorporeal membrane oxygenation-treated with nebulized in-line endotracheal dornase alfa and albuterol, between March 31 and April 24, 2020. Data on tolerability and response were analyzed. RESULTS: The fraction of inspired oxygen requirements was reduced for all five patients after initiating dornase alfa administration. All patients were successfully extubated, discharged from hospital and remain alive. No drug-associated toxicities were identified. CONCLUSIONS: Results suggest that dornase alfa will be well-tolerated by patients with severe COVID-19. Clinical trials are required to formally test the dosing, safety, and efficacy of dornase alfa in COVID-19, and several have been recently registered.


Assuntos
Albuterol/administração & dosagem , Infecções por Coronavirus/tratamento farmacológico , Desoxirribonuclease I/administração & dosagem , Pneumonia Viral/tratamento farmacológico , Respiração Artificial , Adulto , Idoso , Albuterol/uso terapêutico , Broncodilatadores/administração & dosagem , Broncodilatadores/uso terapêutico , COVID-19 , Infecções por Coronavirus/terapia , Desoxirribonuclease I/uso terapêutico , Feminino , Humanos , Intubação Intratraqueal , Masculino , Nebulizadores e Vaporizadores , Pandemias , Pneumonia Viral/terapia , Proteínas Recombinantes/administração & dosagem , Proteínas Recombinantes/uso terapêutico
11.
Gastroenterology ; 157(5): 1413-1428.e11, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31352001

RESUMO

BACKGROUND & AIMS: Obesity is a risk factor for pancreatic cancer. In mice, a high-fat diet (HFD) and expression of oncogenic KRAS lead to development of invasive pancreatic ductal adenocarcinoma (PDAC) by unknown mechanisms. We investigated how oncogenic KRAS regulates the expression of fibroblast growth factor 21, FGF21, a metabolic regulator that prevents obesity, and the effects of recombinant human FGF21 (rhFGF21) on pancreatic tumorigenesis. METHODS: We performed immunohistochemical analyses of FGF21 levels in human pancreatic tissue arrays, comprising 59 PDAC specimens and 45 nontumor tissues. We also studied mice with tamoxifen-inducible expression of oncogenic KRAS in acinar cells (KrasG12D/+ mice) and fElasCreERT mice (controls). KrasG12D/+ mice were placed on an HFD or regular chow diet (control) and given injections of rhFGF21 or vehicle; pancreata were collected and analyzed by histology, immunoblots, quantitative polymerase chain reaction, and immunohistochemistry. We measured markers of inflammation in the pancreas, liver, and adipose tissue. Activity of RAS was measured based on the amount of bound guanosine triphosphate. RESULTS: Pancreatic tissues of mice expressed high levels of FGF21 compared with liver tissues. FGF21 and its receptor proteins were expressed by acinar cells. Acinar cells that expressed KrasG12D/+ had significantly lower expression of Fgf21 messenger RNA compared with acinar cells from control mice, partly due to down-regulation of PPARG expression-a transcription factor that activates Fgf21 transcription. Pancreata from KrasG12D/+ mice on a control diet and given injections of rhFGF21 had reduced pancreatic inflammation, infiltration by immune cells, and acinar-to-ductal metaplasia compared with mice given injections of vehicle. HFD-fed KrasG12D/+ mice given injections of vehicle accumulated abdominal fat, developed extensive inflammation, pancreatic cysts, and high-grade pancreatic intraepithelial neoplasias (PanINs); half the mice developed PDAC with liver metastases. HFD-fed KrasG12D/+ mice given injections of rhFGF21 had reduced accumulation of abdominal fat and pancreatic triglycerides, fewer pancreatic cysts, reduced systemic and pancreatic markers of inflammation, fewer PanINs, and longer survival-only approximately 12% of the mice developed PDACs, and none of the mice had metastases. Pancreata from HFD-fed KrasG12D/+ mice given injections of rhFGF21 had lower levels of active RAS than from mice given vehicle. CONCLUSIONS: Normal acinar cells from mice and humans express high levels of FGF21. In mice, acinar expression of oncogenic KRAS significantly reduces FGF21 expression. When these mice are placed on an HFD, they develop extensive inflammation, pancreatic cysts, PanINs, and PDACs, which are reduced by injection of FGF21. FGF21 also reduces the guanosine triphosphate binding capacity of RAS. FGF21 might be used in the prevention or treatment of pancreatic cancer.


Assuntos
Células Acinares/metabolismo , Carcinoma Ductal Pancreático/metabolismo , Transformação Celular Neoplásica/metabolismo , Dieta Hiperlipídica , Fatores de Crescimento de Fibroblastos/metabolismo , Neoplasias Intraductais Pancreáticas/metabolismo , Neoplasias Pancreáticas/metabolismo , Proteínas Proto-Oncogênicas p21(ras)/metabolismo , Células Acinares/patologia , Animais , Carcinoma Ductal Pancreático/genética , Carcinoma Ductal Pancreático/patologia , Carcinoma Ductal Pancreático/prevenção & controle , Transformação Celular Neoplásica/genética , Transformação Celular Neoplásica/patologia , Regulação para Baixo , Fatores de Crescimento de Fibroblastos/genética , Regulação Neoplásica da Expressão Gênica , Humanos , Proteínas Klotho , Proteínas de Membrana/genética , Proteínas de Membrana/metabolismo , Camundongos Transgênicos , Mutação , PPAR gama/genética , PPAR gama/metabolismo , Cisto Pancreático/genética , Cisto Pancreático/metabolismo , Cisto Pancreático/patologia , Neoplasias Intraductais Pancreáticas/genética , Neoplasias Intraductais Pancreáticas/patologia , Neoplasias Intraductais Pancreáticas/prevenção & controle , Neoplasias Pancreáticas/genética , Neoplasias Pancreáticas/patologia , Neoplasias Pancreáticas/prevenção & controle , Pancreatite/genética , Pancreatite/metabolismo , Pancreatite/patologia , Proteínas Proto-Oncogênicas p21(ras)/genética , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/genética , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/metabolismo , Transdução de Sinais , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Proteína Supressora de Tumor p53/genética , Proteína Supressora de Tumor p53/metabolismo
12.
BMC Cancer ; 20(1): 38, 2020 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-31941506

RESUMO

BACKGROUND: Pancreatic adenosquamous carcinoma has a poor prognosis, with limited prospective trial data to guide optimal treatment. The potential impact of drug metabolism on the treatment response of patients with pancreatic adenosquamous carcinoma is largely unknown. CASE PRESENTATION: We describe the case of a 51 year old woman with pancreatic adenosquamous carcinoma who, following surgical resection, experienced early disease relapse during adjuvant gemcitabine therapy. Paradoxically, this was followed by an exceptional response to capecitabine therapy lasting 34.6 months. Strong expression of cytidine deaminase was detected within the tumour. CONCLUSIONS: This case study demonstrates that early relapse during adjuvant chemotherapy for pancreatic adenosquamous carcinoma may be compatible with a subsequent exceptional response to second line chemotherapy, an important observation given the poor overall prognosis of patients with adenosquamous carcinoma. Cytidine deaminase is predicted to inactivate gemcitabine and, conversely, catalyze capecitabine activation. We discuss strong intra-tumoural expression of cytidine deaminase as a potential mechanism to explain this patient's disparate responses to gemcitabine and capecitabine therapy, and highlight the benefit that may be gained from considering similar determinants of response to chemotherapy in clinical practice.


Assuntos
Antimetabólitos Antineoplásicos/uso terapêutico , Carcinoma Adenoescamoso/tratamento farmacológico , Carcinoma Adenoescamoso/genética , Citidina Desaminase/genética , Desoxicitidina/análogos & derivados , Expressão Gênica , Neoplasias Pancreáticas/tratamento farmacológico , Neoplasias Pancreáticas/genética , Antimetabólitos Antineoplásicos/administração & dosagem , Antimetabólitos Antineoplásicos/efeitos adversos , Carcinoma Adenoescamoso/diagnóstico , Quimioterapia Adjuvante , Citidina Desaminase/metabolismo , Desoxicitidina/administração & dosagem , Desoxicitidina/efeitos adversos , Desoxicitidina/uso terapêutico , Feminino , Humanos , Imuno-Histoquímica , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Neoplasias Pancreáticas/diagnóstico , Neoplasias Pancreáticas/mortalidade , Recidiva , Retratamento , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Gencitabina
13.
Oncologist ; 23(1): 116-117, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29021379

RESUMO

Immune-related radiological and biomarker monitoring in cancer immunotherapy trials permits interrogation of efficacy and reasons for therapeutic failure. We report the results from a cross-sectional analysis of response monitoring in 685 T-cell checkpoint-targeted cancer immunotherapy trials in solid malignancies, as registered on the U.S. National Institutes of Health trial registry by October 2016. Immune-related radiological response criteria were registered for only 25% of clinical trials. Only 38% of trials registered an exploratory immunological biomarker, and registration of immunological biomarkers has decreased over the last 15 years. We suggest that increasing the utilization of immune-related response monitoring across cancer immunotherapy trials will improve analysis of outcomes and facilitate translational efforts to extend the benefit of immunotherapy to a greater proportion of patients with cancer.


Assuntos
Antineoplásicos Imunológicos/uso terapêutico , Imunidade Celular/imunologia , Imunoterapia , Monitorização Imunológica/estatística & dados numéricos , Neoplasias/tratamento farmacológico , Estudos Transversais , Humanos , Imunidade Celular/efeitos dos fármacos , Monitorização Imunológica/métodos , Neoplasias/imunologia , Prognóstico
14.
Br J Cancer ; 114(4): 381-7, 2016 Feb 16.
Artigo em Inglês | MEDLINE | ID: mdl-26882063

RESUMO

BACKGROUND: Second-line chemotherapy treatment of patients with relapsed gastric and oesophageal cancers in comparison with supportive care (SC) alone has been supported by recent phase 3 clinical trials, but a meta-analysis of patient-level data is lacking. METHODS: We searched Medline, the Cochrane Central Register of Controlled Trials (CENTRAL), and the Web of Science for phase 3 clinical trials that compared second-line chemotherapy with SC alone for gastric and oesophageal cancers. A meta-analysis of the comprehensive patient-level data from the three identified trials was performed. RESULTS: A total of 410 patients with gastric (n=301), gastroesophageal junction (n=76), or oesophageal (n=33) adenocarcinoma were identified. In all, 154 patients received single-agent docetaxel and 84 patients received single-agent irinotecan, each with SC. SC alone was given to 172 patients. Chemotherapy significantly reduced the risk of death (hazard ratio (HR)=0.63, 95% confidence interval (CI)=0.51-0.77, P<0.0001). This effect was observed for treatment with docetaxel (HR=0.71, 95% CI=0.56-0.89, P=0.003) and irinotecan (HR=0.49, 95% CI=0.36-0.67, P<0.001). Overall survival (OS) benefit was greatest for patients who progressed 3-6 months following first-line chemotherapy (HR=0.39, 95% CI=0.26-0.59, P<0.0001). Performance status (PS) 0-1 compared with PS 2 (HR=0.66, 95% CI=0.46-0.94, P=0.02), locally advanced disease compared with metastatic disease (HR=0.41, 95% CI=0.25-0.67, P=0.0004) and older age (HR=0.94 per 5 years, 95% CI=0.90-0.99, P=0.01) were significant predictors of improved OS. Progression of disease during first-line treatment (HR=1.24, 95% CI=0.96-1.59) or within the first 3 months of completion of first-line treatment (HR=1.42, 95% CI=1.09-1.83) were predictors of an increased risk of death compared with progression between 3 and 6 months (P=0.03). Health-related quality of life outcomes were reported in only one of the three trials, precluding meta-analysis of these parameters. CONCLUSIONS: This meta-analysis of patient-level data confirms that second-line chemotherapy treatment results in significantly better OS compared with SC alone in patients with platinum and fluoropyrimidine refractory gastric and oesphageal adenocarcinoma. Health-related quality of life outcomes should be included in future trials in this setting.


Assuntos
Adenocarcinoma/terapia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Esofágicas/terapia , Junção Esofagogástrica/patologia , Adenocarcinoma/tratamento farmacológico , Idoso , Neoplasias Esofágicas/tratamento farmacológico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Ensaios Clínicos Controlados Aleatórios como Assunto
15.
Proc Natl Acad Sci U S A ; 110(50): 20212-7, 2013 Dec 10.
Artigo em Inglês | MEDLINE | ID: mdl-24277834

RESUMO

An autochthonous model of pancreatic ductal adenocarcinoma (PDA) permitted the analysis of why immunotherapy is ineffective in this human disease. Despite finding that PDA-bearing mice had cancer cell-specific CD8(+) T cells, the mice, like human patients with PDA, did not respond to two immunological checkpoint antagonists that promote the function of T cells: anti-cytotoxic T-lymphocyte-associated protein 4 (α-CTLA-4) and α-programmed cell death 1 ligand 1 (α-PD-L1). Immune control of PDA growth was achieved, however, by depleting carcinoma-associated fibroblasts (CAFs) that express fibroblast activation protein (FAP). The depletion of the FAP(+) stromal cell also uncovered the antitumor effects of α-CTLA-4 and α-PD-L1, indicating that its immune suppressive activity accounts for the failure of these T-cell checkpoint antagonists. Three findings suggested that chemokine (C-X-C motif) ligand 12 (CXCL12) explained the overriding immunosuppression by the FAP(+) cell: T cells were absent from regions of the tumor containing cancer cells, cancer cells were coated with the chemokine, CXCL12, and the FAP(+) CAF was the principal source of CXCL12 in the tumor. Administering AMD3100, a CXCL12 receptor chemokine (C-X-C motif) receptor 4 inhibitor, induced rapid T-cell accumulation among cancer cells and acted synergistically with α-PD-L1 to greatly diminish cancer cells, which were identified by their loss of heterozygosity of Trp53 gene. The residual tumor was composed only of premalignant epithelial cells and inflammatory cells. Thus, a single protein, CXCL12, from a single stromal cell type, the FAP(+) CAF, may direct tumor immune evasion in a model of human PDA.


Assuntos
Carcinoma Ductal Pancreático/terapia , Quimiocina CXCL12/metabolismo , Gelatinases/metabolismo , Imunoterapia/métodos , Proteínas de Membrana/metabolismo , Neoplasias Pancreáticas/terapia , Serina Endopeptidases/metabolismo , Evasão Tumoral/genética , Análise de Variância , Animais , Sequência de Bases , Benzilaminas , Carcinoma Ductal Pancreático/imunologia , Ciclamos , Endopeptidases , ELISPOT , Fibroblastos/metabolismo , Citometria de Fluxo , Imunofluorescência , Compostos Heterocíclicos , Imuno-Histoquímica , Camundongos , Dados de Sequência Molecular , Neoplasias Pancreáticas/imunologia , Análise de Sequência de RNA
16.
Lancet Oncol ; 15(1): 78-86, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24332238

RESUMO

BACKGROUND: Second-line chemotherapy for patients with oesophagogastric adenocarcinoma refractory to platinum and fluoropyrimidines has not shown benefits in health-related quality of life (HRQoL). We assessed whether the addition of docetaxel to active symptom control alone can improve survival and HRQoL for patients. METHODS: For this open-labelled, multicentre trial, we recruited patients aged 18 years or older from 30 UK centres. Patients were eligible if they had an advanced, histologically confirmed adenocarcinoma of the oesophagus, oesophagogastric junction, or stomach that had progressed on or within 6 months of treatment with a platinum-fluoropyrimidine combination. Patients could have an Eastern Cooperative Oncology Group performance status of 0-2. We randomly assigned patients using a central, computerised minimisation procedure to receive docetaxel plus active symptom control, or active symptom control alone (1:1; stratified by disease status, disease site, duration of response to previous chemotherapy, and performance status). Docetaxel was given at a dose of 75 mg/m(2) by intravenous infusion every 3 weeks for up to six cycles. The primary endpoint was overall survival, analysed by intention to treat. This is the report of the planned final analysis. This study is an International Standardised Randomised Controlled Trial, number ISRCTN13366390. FINDINGS: Between April 21, 2008, and April 26, 2012, we recruited 168 patients, allocating 84 to each treatment group. After a median follow-up of 12 months [IQR 10-21]) and 161 (96%) deaths (80 in the docetaxel group, 81 in the active symptom control group), median overall survival in the docetaxel group was 5.2 months (95% CI 4.1-5.9) versus 3.6 months (3.3-4.4) in the active symptom control group (hazard ratio 0.67, 95% CI 0.49-0.92; p=0.01). Docetaxel was associated with higher incidence of grade 3-4 neutropenia (12 [15%] patients vs no patients), infection (15 [19%] patients vs two [3%] patients), and febrile neutropenia (six [7%] patients vs no patients). Patients receiving docetaxel reported less pain (p=0.0008) and less nausea and vomiting (p=0.02) and constipation (p=0.02). Global HRQoL was similar between the groups (p=0.53). Disease specific HRQoL measures also showed benefits for docetaxel in reducing dysphagia (p=0.02) and abdominal pain (p=0.01). INTERPRETATION: Our findings suggest that docetaxel can be recommended as an appropriate second-line treatment for patients with oesophagogastric adenocarcinoma that is refractory to treatment with platinum and fluoropyrimidine. FUNDING: Cancer Research UK.


Assuntos
Adenocarcinoma/tratamento farmacológico , Antineoplásicos/uso terapêutico , Neoplasias Esofágicas/tratamento farmacológico , Junção Esofagogástrica , Neoplasias Gástricas/tratamento farmacológico , Taxoides/uso terapêutico , Adenocarcinoma/mortalidade , Adenocarcinoma/psicologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Docetaxel , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Qualidade de Vida , Neoplasias Gástricas/mortalidade , Neoplasias Gástricas/psicologia
18.
JAMA Oncol ; 10(5): 652-657, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38512297

RESUMO

Importance: Racially minoritized and socioeconomically disadvantaged populations are currently underrepresented in clinical trials. Data-driven, quantitative analyses and strategies are required to help address this inequity. Objective: To systematically analyze the geographical distribution of self-identified racial and socioeconomic demographics within commuting distance to cancer clinical trial centers and other hospitals in the US. Design, Setting, and Participants: This longitudinal quantitative study used data from the US Census 2020 Decennial and American community survey (which collects data from all US residents), OpenStreetMap, National Cancer Institute-designated Cancer Centers list, Nature Index of Cancer Research Health Institutions, National Trial registry, and National Homeland Infrastructure Foundation-Level Data. Statistical analyses were performed on data collected between 2006 and 2020. Main Outcomes and Measures: Population distributions of socioeconomic deprivation indices and self-identified race within 30-, 60-, and 120-minute 1-way driving commute times from US cancer trial sites. Map overlay of high deprivation index and high diversity areas with existing hospitals, existing major cancer trial centers, and commuting distance to the closest cancer trial center. Results: The 78 major US cancer trial centers that are involved in 94% of all US cancer trials and included in this study were found to be located in areas with socioeconomically more affluent populations with higher proportions of self-identified White individuals (+10.1% unpaired mean difference; 95% CI, +6.8% to +13.7%) compared with the national average. The top 10th percentile of all US hospitals has catchment populations with a range of absolute sum difference from 2.4% to 35% from one-third each of Asian/multiracial/other (Asian alone, American Indian or Alaska Native alone, Native Hawaiian or Other Pacific Islander alone, some other race alone, population of 2 or more races), Black or African American, and White populations. Currently available data are sufficient to identify diverse census tracks within preset commuting times (30, 60, or 120 minutes) from all hospitals in the US (N = 7623). Maps are presented for each US city above 500 000 inhabitants, which display all prospective hospitals and major cancer trial sites within commutable distance to racially diverse and socioeconomically disadvantaged populations. Conclusion and Relevance: This study identified biases in the sociodemographics of populations living within commuting distance to US-based cancer trial sites and enables the determination of more equitably commutable prospective satellite hospital sites that could be mobilized for enhanced racial and socioeconomic representation in clinical trials. The maps generated in this work may inform the design of future clinical trials or investigations in enrollment and retention strategies for clinical trials; however, other recruitment barriers still need to be addressed to ensure racial and socioeconomic demographics within the geographical vicinity of a clinical site can translate to equitable trial participant representation.


Assuntos
Ensaios Clínicos como Assunto , Acessibilidade aos Serviços de Saúde , Neoplasias , Viagem , Humanos , Estados Unidos , Viagem/estatística & dados numéricos , Acessibilidade aos Serviços de Saúde/estatística & dados numéricos , Ensaios Clínicos como Assunto/estatística & dados numéricos , Neoplasias/terapia , Neoplasias/etnologia , Fatores Socioeconômicos , Fatores de Tempo , Institutos de Câncer/estatística & dados numéricos , Estudos Longitudinais
19.
Nat Commun ; 15(1): 4682, 2024 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-38824130

RESUMO

Interleukin-6 (IL-6) has been long considered a key player in cancer cachexia. It is believed that sustained elevation of IL-6 production during cancer progression causes brain dysfunctions, which ultimately result in cachexia. However, how peripheral IL-6 influences the brain remains poorly understood. Here we show that neurons in the area postrema (AP), a circumventricular structure in the hindbrain, is a critical mediator of IL-6 function in cancer cachexia in male mice. We find that circulating IL-6 can rapidly enter the AP and activate neurons in the AP and its associated network. Peripheral tumor, known to increase circulating IL-6, leads to elevated IL-6 in the AP, and causes potentiated excitatory synaptic transmission onto AP neurons and AP network hyperactivity. Remarkably, neutralization of IL-6 in the brain of tumor-bearing mice with an anti-IL-6 antibody attenuates cachexia and the hyperactivity in the AP network, and markedly prolongs lifespan. Furthermore, suppression of Il6ra, the gene encoding IL-6 receptor, specifically in AP neurons with CRISPR/dCas9 interference achieves similar effects. Silencing Gfral-expressing AP neurons also attenuates cancer cachectic phenotypes and AP network hyperactivity. Our study identifies a central mechanism underlying the function of peripheral IL-6, which may serve as a target for treating cancer cachexia.


Assuntos
Caquexia , Interleucina-6 , Neurônios , Receptores de Interleucina-6 , Animais , Caquexia/metabolismo , Caquexia/etiologia , Interleucina-6/metabolismo , Masculino , Neurônios/metabolismo , Camundongos , Receptores de Interleucina-6/metabolismo , Camundongos Endogâmicos C57BL , Neoplasias/metabolismo , Neoplasias/complicações , Linhagem Celular Tumoral , Humanos
20.
Acta Physiol (Oxf) ; 240(8): e14167, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38779820

RESUMO

AIM: To investigate systemic regulators of the cancer-associated cachexia syndrome (CACS) in a pre-clinical model for lung cancer with the goal to identify therapeutic targets for tissue wasting. METHODS: Using the Kras/Lkb1 (KL) mouse model, we found that CACS is associated with white adipose tissue (WAT) dysfunction that directly affects skeletal muscle homeostasis. WAT transcriptomes showed evidence of reduced adipogenesis, and, in agreement, we found low levels of circulating adiponectin. To preserve adipogenesis and restore adiponectin levels, we treated mice with the PPAR-γ agonist, rosiglitazone. RESULTS: Rosiglitazone treatment increased serum adiponectin levels, delayed weight loss, and preserved skeletal muscle and adipose tissue mass, as compared to vehicle-treated mice. The preservation of muscle mass with rosiglitazone was associated with increases in AMPK and AKT activity. Similarly, activation of the adiponectin receptors in muscle cells increased AMPK activity, anabolic signaling, and protein synthesis. CONCLUSION: Our data suggest that PPAR-γ agonists may be a useful adjuvant therapy to preserve tissue mass in lung cancer.


Assuntos
Adiponectina , Caquexia , Neoplasias Pulmonares , Rosiglitazona , Animais , Rosiglitazona/farmacologia , Rosiglitazona/uso terapêutico , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/patologia , Caquexia/metabolismo , Caquexia/tratamento farmacológico , Adiponectina/metabolismo , Camundongos , Músculo Esquelético/metabolismo , Músculo Esquelético/efeitos dos fármacos , PPAR gama/metabolismo , PPAR gama/agonistas , Masculino , Tecido Adiposo Branco/metabolismo , Tecido Adiposo Branco/efeitos dos fármacos , Camundongos Endogâmicos C57BL , Tiazolidinedionas/farmacologia , Tiazolidinedionas/uso terapêutico
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