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The American Joint Committee on Cancer (AJCC) staging system for all cancer sites, including gastroenteropancreatic neuroendocrine tumors (GEP-NETs), is meant to be dynamic, requiring periodic updates to optimize AJCC staging definitions. This entails the collaboration of experts charged with evaluating new evidence that supports changes to each staging system. GEP-NETs are the second most prevalent neoplasm of gastrointestinal origin after colorectal cancer. Since publication of the AJCC eighth edition, the World Health Organization has updated the classification and separates grade 3 GEP-NETs from poorly differentiated neuroendocrine carcinoma. In addition, because of major advancements in diagnostic and therapeutic technologies for GEP-NETs, AJCC version 9 advocates against the use of serum chromogranin A for the diagnosis and monitoring of GEP-NETs. Furthermore, AJCC version 9 recognizes the increasing role of endoscopy and endoscopic resection in the diagnosis and management of NETs, particularly in the stomach, duodenum, and colorectum. Finally, T1NXM0 has been added to stage I in these disease sites as well as in the appendix.
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Neoplasias Intestinales , Estadificación de Neoplasias , Tumores Neuroendocrinos , Neoplasias Pancreáticas , Neoplasias Gástricas , Humanos , Tumores Neuroendocrinos/patología , Tumores Neuroendocrinos/diagnóstico , Tumores Neuroendocrinos/terapia , Estadificación de Neoplasias/métodos , Neoplasias Pancreáticas/patología , Neoplasias Pancreáticas/diagnóstico , Neoplasias Gástricas/patología , Neoplasias Gástricas/diagnóstico , Neoplasias Intestinales/patología , Neoplasias Intestinales/diagnóstico , Neoplasias Intestinales/terapia , Estados UnidosRESUMEN
BACKGROUND: Treatment recommendations for patients with neuroendocrine tumors (NETs) include the use of octreotide long-acting release (LAR) for long-term therapy and immediate-release (IR) as rescue therapy to control the breakthrough symptoms of carcinoid syndrome (CS). High doses of LAR are commonly used in clinical practice. This study aimed to evaluate the real-world utilization of LAR and preceding IR use at the prescription and patient levels. METHODS: We used an administrative claims database (2009-2018) containing privately insured enrollees. We calculated the normalized LAR dose from pharmacy claims and the initial mean IR daily dose at the prescription level. At the patient level, we conducted a retrospective cohort study that included patients continuously enrolled with ≥1 pharmacy claim of LAR and evaluated the frequency and the clinical reason for dose escalation of LAR. The definition of the above-label maximum dose of LAR was ≥30 mg/4 weeks. RESULTS: Nineteen percent of LAR prescriptions had an above-label maximum dose. Only 7% of LAR prescriptions had preceding IR use. There were 386 patients with NETs or CS vs. 570 with an unknown diagnosis. Comparing patients with NETs or CS to those with an unknown diagnosis, 22.3% vs. 11.0 % experienced dose escalations and 29.0% vs. 26.6% had IR use before dose escalation, respectively. LAR dose escalation occurred in 50.9% vs. 39.2% for symptom control, 12.3% vs. 7.1% for tumor progression control, and 16.6% vs. 6.0% for both reasons in NETs/CS and unknown groups, respectively. CONCLUSION: Octreotide LAR dosing above the label-maximum dose is common and IR rescue dosing appears to be underutilized.
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Síndrome Carcinoide Maligno , Tumores Neuroendocrinos , Humanos , Octreótido/uso terapéutico , Tumores Neuroendocrinos/tratamiento farmacológico , Tumores Neuroendocrinos/patología , Antineoplásicos Hormonales , Estudios Retrospectivos , Síndrome Carcinoide Maligno/tratamiento farmacológicoRESUMEN
OPINION STATEMENT: The classification of mixed neuroendocrine-non-neuroendocrine neoplasms (MiNEN) is evolving, and no clear management guidelines are currently available. However, recent studies provide insight into factors affecting outcomes and could help develop treatment decisions for patients with these rare malignancies. The majority of MiNENs have a poorly differentiated neuroendocrine carcinoma (NEC) component which is associated with an aggressive clinical course and poor outcomes. Due to the paucity of clinical trials, strategies adopted in gastrointestinal cancers and NECs are used to manage MiNENs. It is also to be noted that the thoracic neuroendocrine neoplasm WHO 2021 classification does not recognize MiNEN terminology but suggests an equivalent terminology called "combined neuroendocrine non neuroendocrine neoplasm." Surgical management is appropriate in early-stage disease with a low threshold for addition of adjuvant chemotherapy. Multimodality treatment with chemotherapy offers a survival benefit in advanced disease or when surgical resection is not possible without significant morbidity. Chemotherapy should be directed at the more aggressive component which is often the NEC component. In addition, molecular testing should be employed to evaluate patients for enrollment in clinical trials and other targeted treatments. Being a rare disease with retrospective studies and case series providing the majority of data on treatment selection, it is essential to include more granular details of pathology (e.g., Ki-67, mitotic index, percentage of each component, staging information) and treatment modalities (e.g., type and duration, rationale, radiologic response, survival outcomes) in future studies to make systematic reviews possible and help derive meaningful conclusions.
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Neoplasias Gastrointestinales , Tumores Neuroendocrinos , Neoplasias Pancreáticas , Quimioterapia Adyuvante , Humanos , Recién Nacido , Tumores Neuroendocrinos/diagnóstico , Tumores Neuroendocrinos/etiología , Tumores Neuroendocrinos/terapia , Neoplasias Pancreáticas/patología , Estudios RetrospectivosRESUMEN
BACKGROUND: Neuroendocrine tumors, although relatively rare in incidence, are now the second most prevalent gastrointestinal neoplasm owing to indolent disease biology. A small but significant sub-group of neuroendocrine tumor patients suffer from diarrhea. This is usually secondary to carcinoid syndrome but can also be a result of short gut syndrome, bile acid excess or iatrogenic etiologies. Recently, an amino acid based oral rehydration solution (enterade® Advanced Oncology Formula) was found to have anti-diarrheal properties in preclinical models. METHODS: A retrospective chart review of all NET patients treated with enterade® AO was performed after IRB approval. RESULTS: Ninety-eight NET patients who had received enterade® AO at our clinic from May 2017 through June 2019 were included. Patients (N = 49 of 98) with follow up data on bowel movements (BMs) were included for final analysis. Eighty-four percent of patients (41/49) had fewer BMs after taking enterade® AO and 66% (27/41) reported more than 50% reduction in BM frequency. The mean number of daily BMs was 6.6 (range, 3-20) at baseline before initiation of therapy, while the mean number of BMs at 1 week time point post enterade® AO was 2.9 (range, 0-11). CONCLUSIONS: Our retrospective observations are encouraging and support prospective validation with appropriate controls in NET patients. This is first published report of the potential anti-diarrheal activity of enterade® AO in NET patients.
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Aminoácidos/administración & dosificación , Diarrea/tratamiento farmacológico , Tumores Neuroendocrinos/complicaciones , Soluciones para Rehidratación/administración & dosificación , Adulto , Anciano , Anciano de 80 o más Años , Diarrea/etiología , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Tumores Neuroendocrinos/tratamiento farmacológico , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
Recently, molecularly targeted agents and immunotherapy have been advanced for the treatment of relapse or refractory cancer patients, where disease progression-free survival or event-free survival is often a primary endpoint for the trial design. However, methods to evaluate two-stage single-arm phase II trials with a time-to-event endpoint are currently processed under an exponential distribution, which limits application of real trial designs. In this paper, we developed an optimal two-stage design, which is applied to the four commonly used parametric survival distributions. The proposed method has advantages compared with existing methods in that the choice of underlying survival model is more flexible and the power of the study is more adequately addressed. Therefore, the proposed two-stage design can be routinely used for single-arm phase II trial designs with a time-to-event endpoint as a complement to the commonly used Simon's two-stage design for the binary outcome.
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Ensayos Clínicos Fase II como Asunto , Determinación de Punto Final , Proyectos de Investigación , Carcinoma de Pulmón de Células no Pequeñas/inmunología , Carcinoma de Pulmón de Células no Pequeñas/mortalidad , Carcinoma de Pulmón de Células no Pequeñas/terapia , Ensayos Clínicos Fase II como Asunto/estadística & datos numéricos , Interpretación Estadística de Datos , Determinación de Punto Final/estadística & datos numéricos , Humanos , Inmunoterapia , Neoplasias Pulmonares/inmunología , Neoplasias Pulmonares/mortalidad , Neoplasias Pulmonares/terapia , Modelos Estadísticos , Supervivencia sin Progresión , Proyectos de Investigación/estadística & datos numéricos , Análisis de Supervivencia , Factores de TiempoRESUMEN
Leveraging the immune system to thwart cancer is not a novel strategy and has been explored via cancer vaccines and use of immunomodulators like interferons. However, it was not until the introduction of immune checkpoint inhibitors that we realized the true potential of immunotherapy in combating cancer. Oncolytic viruses are one such immunotherapeutic tool that is currently being explored in cancer therapeutics. We present the most comprehensive systematic review of all oncolytic viruses in Phase 1, 2, and 3 clinical trials published to date. We performed a systematic review of all published clinical trials indexed in PubMed that utilized oncolytic viruses. Trials were reviewed for type of oncolytic virus used, method of administration, study design, disease type, primary outcome, and relevant adverse effects. A total of 120 trials were found; 86 trials were available for our review. Included were 60 phase I trials, five phase I/II combination trials, 19 phase II trials, and two phase III clinical trials. Oncolytic viruses are feverously being evaluated in oncology with over 30 different types of oncolytic viruses being explored either as a single agent or in combination with other antitumor agents. To date, only one oncolytic virus therapy has received an FDA approval but advances in bioengineering techniques and our understanding of immunomodulation to heighten oncolytic virus replication and improve tumor kill raises optimism for its future drug development.
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Vectores Genéticos/genética , Viroterapia Oncolítica , Virus Oncolíticos/genética , Ensayos Clínicos como Asunto , Terapia Combinada/métodos , Manejo de la Enfermedad , Técnicas de Transferencia de Gen , Humanos , Neoplasias/etiología , Neoplasias/terapia , Viroterapia Oncolítica/efectos adversos , Viroterapia Oncolítica/métodos , Virus Oncolíticos/clasificación , Resultado del TratamientoAsunto(s)
Neoplasias Intestinales , Estadificación de Neoplasias , Tumores Neuroendocrinos , Neoplasias Pancreáticas , Neoplasias Gástricas , Humanos , Tumores Neuroendocrinos/patología , Neoplasias Pancreáticas/patología , Neoplasias Pancreáticas/cirugía , Neoplasias Gástricas/patología , Neoplasias Gástricas/cirugía , Neoplasias Intestinales/patología , Guías de Práctica Clínica como Asunto/normas , PronósticoRESUMEN
BACKGROUND: Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) is a rare pulmonary condition, characterized by diffuse proliferation of neuroendocrine cells in the respiratory epithelium. DIPNECH lesions are less than 5 mm in size and are limited to the basement membrane with no invasion. There is limited information regarding epidemiology, natural history of disease progression, or the management of this rare entity. We present the experience of a center with extensive expertise in neuroendocrine disease. METHODS: A cohort of patients (N = 13) with DIPNECH treated and followed at our institution was identified. We describe the our approach to their care, our disease management and also provide a review of DIPNECH pathophysiology. RESULTS: Our patient cohort consisted of twelve females and one male with a mean age of 63 years at the time of diagnosis. Dyspnea on exertion and dry cough were the most common presenting symptoms. Two patients were under surveillance without treatment; three patients were treated with a short-acting somatostatin analog; three patients were treated with azithromycin alone; four were treated with a combination of long-acting monthly somatostatin analogs and azithromycin; one patient received a combination of long-acting somatostatin analog and everolimus. Five patients had concomitant bronchial carcinoids. CONCLUSIONS: DIPNECH is a rare pathology that can profoundly affect a patient's quality of life. Paroxysmal coughing episodes can be difficult to treat. Our limited single center experience shows encouraging response to use of somatostatin analogs, azithromycin, and everolimus in the management of debilitating DIPNECH associated symptoms.
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Enfermedades Pulmonares/tratamiento farmacológico , Células Neuroendocrinas/patología , Mucosa Respiratoria/patología , Anciano , Antibacterianos/uso terapéutico , Antineoplásicos Hormonales/uso terapéutico , Azitromicina/uso terapéutico , Neoplasias de los Bronquios/complicaciones , Tumor Carcinoide/complicaciones , Tos/etiología , Disnea/etiología , Everolimus/uso terapéutico , Femenino , Humanos , Hiperplasia/complicaciones , Hiperplasia/tratamiento farmacológico , Hiperplasia/fisiopatología , Inmunosupresores/uso terapéutico , Enfermedades Pulmonares/complicaciones , Enfermedades Pulmonares/fisiopatología , Masculino , Persona de Mediana Edad , Nódulos Pulmonares Múltiples/complicaciones , Nódulos Pulmonares Múltiples/tratamiento farmacológico , Nódulos Pulmonares Múltiples/fisiopatología , Octreótido/uso terapéutico , Enfermedad Pulmonar Obstructiva Crónica/complicaciones , Fibrosis Pulmonar/complicaciones , Calidad de VidaRESUMEN
Neuroendocrine tumors (NETs) of the lung are divided into 4 major types: small cell lung cancer (SCLC), large cell neuroendocrine carcinoma (LCNEC), atypical carcinoid (AC) or typical carcinoid (TC). Each classification has distinctly different treatment paradigms, making an accurate initial diagnosis essential. The inconsistent clinical presentation of this disease, however, makes this difficult. The objective of this manuscript is to detail the diagnosis and management of the well differentiated pulmonary carcinoid (PC) tumors. A multidisciplinary approach to work up and treatment should be utilized for each patient. A multimodal radiological work-up is used for diagnosis, with contrast enhanced CT predominantly utilized and functional imaging techniques. A definitive diagnosis is based on tissue findings. Surgical management remains the mainstay of therapy and can be curative. In those with advanced disease, medical treatments consist of somatostatin analog (SSA) therapy, targeted therapy, chemotherapy or peptide receptor radionuclide therapy. SSAs are the standard of care in those with metastatic NETs, using either Octreotide long acting repeatable (LAR) or lanreotide as reasonable options, despite a scarcity of prospective data in PCs. Targeted therapies consist of everolimus which is approved for use in PCs, with various studies showing mixed results with other targeted agents. Additionally, radionuclide therapy may be used and has been shown to increase survival and to reduce symptoms in some studies. Prospective trials are needed to determine other strategies that may be beneficial in PCs as well as sequencing of therapy. Successful diagnosis and optimal treatment relies on a multidisciplinary approach in patients with lung NETs. Clinical trials should be used in appropriate patients.
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Neoplasias Pulmonares/terapia , Tumores Neuroendocrinos/terapia , Humanos , Neoplasias Pulmonares/tratamiento farmacológico , Neoplasias Pulmonares/radioterapia , Tumores Neuroendocrinos/tratamiento farmacológico , Tumores Neuroendocrinos/radioterapiaRESUMEN
BACKGROUND: Neuroendocrine tumors (NETs) are commonly treated with multimodality therapy. The combination of capecitabine and temozolomide (CAPTEM) has been suggested as a treatment option for patients with metastatic NETs. We present our experience with CAPTEM. METHODS: Data on NET patients who were placed on CAPTEM and received at least one cycle were obtained from a Velos eResearch database. Response rate was calculated by RECIST 1.1. Overall survival and progression-free survival (PFS) were calculated by the Kaplan-Meier survival method. RESULTS: A total of 29 patients (17 male and 12 female) were included. Median age at CAPTEM initiation was 58 years (range: 26-77). Primary tumors included 9 small bowel (31%), 15 pancreas (52%), 3 lung (10%), and 2 rectum (7%). Median number of CAPTEM cycles was 8 (range: 1-55). Partial response occurred in 5 patients (5 of 29, 17%); 14 patients (14 of 29, 48%) had stable disease, and 10 patients (10 of 29, 34%) had progressive disease. A total of 3 (20%) and 5 (33%) pancreatic NETs experienced partial response and stable disease, respectively. A total of 2 (14%) and 9 (64%) nonpancreatic NETs experienced partial response and stable disease, respectively. Partial response was noted in 1 patient (13%) and stable disease in 5 patients (63%) with Ki-67 values of less than 2%. In patients with Ki-67 values of 2%-20%, partial response was noted in 3 (19%) and stable disease in 8 (50%). Partial response and stable disease were noted in 1 patient each (20%) with Ki-67 values greater than 20%. Median PFS was 12 months. Adverse reactions caused dose reductions in 24% of patients. CONCLUSION: Although adverse reactions were experienced, most patients tolerated this regimen. CAPTEM should be considered as a reasonable treatment option for metastatic NET patients. IMPLICATIONS FOR PRACTICE: The role of chemotherapy in neuroendocrine tumors has evolved in recent years. The results of this study suggest that the combination of capecitabine and temozolomide provides an adequate treatment option and may prolong survival in patients with a wide variety of metastatic neuroendocrine tumors. Although prospective data are needed, this research adds to the abundance of retrospective experience with this combination that appears to show that capecitabine and temozolomide could potentially be an option for patients with advanced neuroendocrine tumors who have progressed on standard treatment.
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Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Tumores Neuroendocrinos/tratamiento farmacológico , Adulto , Anciano , Capecitabina/administración & dosificación , Capecitabina/efectos adversos , Dacarbazina/administración & dosificación , Dacarbazina/efectos adversos , Dacarbazina/análogos & derivados , Supervivencia sin Enfermedad , Femenino , Humanos , Antígeno Ki-67/análisis , Masculino , Persona de Mediana Edad , Metástasis de la Neoplasia , Tumores Neuroendocrinos/mortalidad , Tumores Neuroendocrinos/patología , TemozolomidaRESUMEN
OBJECTIVES: DIPNECH is a rare pre-neoplastic condition that often presents with a variety of non-specific pulmonary symptoms and sometimes seen in conjunction with pulmonary carcinoid tumors. There are very limited data on use of somatostatin analogs in patients with DIPNECH. We review the long-term outcomes of somatostatin analog therapy with regard to symptom control in patients with DIPNECH. MATERIALS/METHODS: Retrospective study out of our extensive registry of over 2000 neuroendocrine tumors identifies 184 pulmonary neuroendocrine tumors. Out of this, there were five histopathologically confirmed cases of DIPNECH. Appropriate institutional review board permission was taken for this analysis. RESULTS: All 5 patients were females, with a mean age at diagnosis was 65.5 years. Follow-up period includes 1-5 years. Cough was the presenting complaint in all five patients described as mostly dry, except for one patient who had productive early morning cough. Other symptoms seen in one of our patients included wheezing, flushing, and fluctuating blood pressure. No one reported weight loss, hemoptysis, and shortness of breath. One of our patients had a benign thyroid nodule and two patients had previous history of breast cancer. All five of our patients were histopathologically diagnosed by lung biopsy. 4 out of 5 patients were started on a somatostatin analog. All four patients reported drastic improvement in cough. One patient reported mild abdominal discomfort and diarrhea as side effects but remained on treatment. CONCLUSIONS: From our single institution review of neuroendocrine pulmonary tumor cases, we found only five cases of DIPNECH, which reaffirms rare nature of the pathology. It primarily affects females over 60 years with dry cough as the most common presenting symptom. Most of our patients responded to treatment with a somatostatin analog and had significant improvement in their presenting symptoms. Somatostatin analogs were well tolerated resulting in significant resolution of presenting symptoms in most of our patients. Further research is needed; however, a trial of somatostatin analogs should be considered in the treatment of patients with DIPNECH with responders being treated long term.
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Antineoplásicos Hormonales/uso terapéutico , Enfermedades Pulmonares/tratamiento farmacológico , Células Neuroendocrinas/patología , Octreótido/uso terapéutico , Lesiones Precancerosas/tratamiento farmacológico , Anciano , Antineoplásicos Hormonales/efectos adversos , Tos/etiología , Femenino , Humanos , Hiperplasia/complicaciones , Hiperplasia/tratamiento farmacológico , Enfermedades Pulmonares/complicaciones , Persona de Mediana Edad , Octreótido/efectos adversos , Lesiones Precancerosas/complicaciones , Estudios Retrospectivos , Somatostatina/análogos & derivadosRESUMEN
Oxidative burden plays a central role in Alzheimer's disease (AD) pathology, fostering protein aggregation, inflammation, mitochondrial impairment, and cellular dysfunction that collectively lead to neuronal injury. The role of exosomes in propagating the pathology of neurodegenerative diseases including AD is now well established. However, recent studies have also shown that exosomes are crucial responders to oxidative stress in different tissues. Thus, this offers new insights and mechanistic links within the complex pathogenesis of AD through the involvement of oxidative stress and exosomes. Several studies have indicated that exosomes, acting as intracellular communicators, disseminate oxidatively modified contents from one cell to another, propagating the pathology of AD. Another emerging aspect is the exosome-mediated inhibition of ferroptosis in multiple tissues under different conditions which may have a role in neurodegenerative diseases as well. Apart from their involvement in the pathogenesis of AD, exosomes enter the bloodstream serving as novel noninvasive biomarkers for AD; some of the exosome contents also reflect the cerebral oxidative stress in this disease condition. This review highlights the intricate interplay between oxidative stress and exosome dynamics and underscores the potential of exosomes as a novel tool in AD diagnosis.
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Radiation oncologists, radiopharmacists, nuclear medicine physicians, and medical oncologists have seen a renewed clinical interest in radiopharmaceuticals for the curative or the palliative treatment of cancer. To allow for the discovery and the clinical advancement of targeted radiopharmaceuticals, these stakeholders have reformed their trial efforts and remodeled their facilities to accommodate the obligations of a program centered upon radioactive investigational drug products. Now considered informally as drugs and not beam radiotherapy, radiopharmaceuticals can be more easily studied in the traditional clinical trial enterprise ranging from phase 0-I to phase III studies. Resources and physical facilities allocated to radiopharmaceuticals have brought forth new logistics and patient experience for safe and satisfactory drug delivery. The clinical use of theranostic agents-that is, diagnostic and therapeutic radionuclide pairs-has accelerated radiopharmaceutical development.
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BACKGROUND: Various service provision models for youth at risk of homelessness have been researched and implemented, including access to housing and physical and mental health resources. However, even with these interventions, we remain unaware of how best to manage symptoms of depression and anxiety and the rate of drug use in these populations primarily because of a lack of feasibility data. METHODS: This paper presents the results of a mixed-methods study in London, Canada, that examined the feasibility of implementing a biopsychosocial intervention, SKY Schools, in at-risk youth aged between 16 and 25 (n = 49). The study also recorded qualitative responses about the program's usefulness from the perspective of the service users. The SKY Schools intervention consisted of social-emotional learning combined with Sudarshan Kriya Yoga, a standardized yoga-based breathing exercise routine. The intervention program was divided into two phases: an active learning phase and a reinforcement phase. The following feasibility outcome measures were collected: (1) the number of potential participants approached per month, (2) number (proportion) who were successfully screened, (3) the proportion of screened participants who enrolled, (4) the rate of retention in the study, (5) rate of adherence to study protocol, (6) proportion of planned ratings that were completed, (7) intervention cost per case, (8) completeness of final data for analysis, (9) length of time to collect all data, (10) quality of all collected data, (11) determining if partnering community organizations were willing to conduct the study as per study protocol, (12) determining if there were any capacity issues with partners providing intervention and investigators being able to perform the tasks that they were committed to doing, (13) determining if there were any problems of entering the data into a computer, (14) preliminary data about the safety of the intervention, and (15) preliminary estimate of treatment effects. RESULTS: All feasibility outcome measures were collectible. In the city of London, Canada it was feasible to conduct a pilot study in this population of youth at risk of homelessness. Foremost among the findings was a high retention rate (61.2%) and overall positive qualitative feedback with a number of potential suggestions to improve the delivery and quality of the intervention. However, we had a significantly low recruitment rate (0.27 participants per week) suggesting that multiple sites will be needed to achieve an adequate sample size for a subsequent definitive trial. CONCLUSIONS: Future researchers may consider the findings of this feasibility study when designing a randomized control trial to further assess the efficacy and tolerability of SKY Schools. TRIAL REGISTRATION: Trial registration: Clinicaltrials.gov, identifier NCT02749240. Registered April 22, 2016, https://clinicaltrials.gov/ct2/show/NCT02749240 .
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Background: Hepatocellular carcinoma (HCC) is a malignancy with a bleak prognosis. Although emerging research increasingly supports the involvement of chromatin regulators (CRs) in cancer development, CRs in HCC patients have not received proportionate attention. This study aimed to investigate the role and prognostic significance of CRs in HCC patients, providing new insights for clinical diagnosis and treatment strategies. Methods: We analyzed 424 samples in The Cancer Genome Atlas-Liver hepatocellular carcinoma (TCGA-LIHC) data to identify key CR genes associated with HCC prognosis by differential expression and univariate Cox regression analyses. LASSO-multivariate Cox regression method was used for construction of a prognostic signature and development of a CR-related prognosis model. The prognosis capacity of the model was evaluated via Kaplan-Meier method. Relationship between the model and tumor microenvironment (TME) was evaluated. Additionally, clinical variables and the model were incorporated to create a nomogram. The role of the prognostic gene MRG-binding protein (MRGBP) in HCC was elucidated by immunohistochemistry and semiquantitative analysis. Results: A risk score model, comprising B-lymphoma Mo-MLV insertion region 1 (BMI1), chromobox 2 (CBX2), and MRGBP, was constructed. The area under the curve (AUC) of the CR-based signature is 0.698 (P<0.05), exhibiting robust predictive power. Functional and pathway analyses illuminated the biological relevance of these genes. Immune microenvironment analysis suggested potential implications for immunotherapy. Drug sensitivity analysis identified agents for targeted treatment. Clinical samples show that MRGBP is highly expressed in HCC tissues. Conclusions: This CR-based signature shows promise as a valuable prognostic tool for HCC patients. It demonstrates predictive capabilities, independence from other clinical factors, and potential clinical applicability. In addition, we need more experiments to validate our findings. These findings offer insights into HCC prognosis and treatment, with implications for personalized medicine and improved patient outcomes.
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Neuroendocrine neoplasms (NENs) arise from neuroendocrine cells in a wide variety of organs. One of the most affected disease sites is the gastrointestinal system, which originates the gastro-entero-pancreatic NENs (GEP-NENs), a heterogenous group of malignancies that are rapidly increasing in incidence. These tumors can be functioning, with secretory activity leading to identifiable clinical syndromes, or non-functioning, with no secretory activity but with local symptoms of tumor growth and metastasis. A limitation in biomarkers is a crucial unmet need in non-secretory NEN management, as clinical decision-making is made more difficult by obstacles in tumor classification, prognostic evaluation, assessment of treatment response and surveillance. The objective of this review is to present existing and novel biomarkers for NENs that can function as prognostic factors and monitor disease progression or regression longitudinally, with a special emphasis on innovative research into novel multianalyte biomarkers.
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Ribonucleotide Reductase (RNR) is a rate-limiting enzyme in the production of deoxyribonucleoside triphosphates (dNTPs), which are essential substrates for DNA repair after radiation damage. We explored the radiosensitization property of RNR and investigated a selective RRM2 inhibitor, 3-AP, as a radiosensitizer in the treatment of metastatic pNETs. We investigated the role of RNR subunit, RRM2, in pancreatic neuroendocrine (pNET) cells and responses to radiation in vitro. We also evaluated the selective RRM2 subunit inhibitor, 3-AP, as a radiosensitizer to treat pNET metastases in vivo. Knockdown of RNR subunits demonstrated that RRM1 and RRM2 subunits, but not p53R3, play significant roles in cell proliferation. RRM2 inhibition activated DDR pathways through phosphorylation of ATM and DNA-PK protein kinases but not ATR. RRM2 inhibition also induced Chk1 and Chk2 phosphorylation, resulting in G1/S phase cell cycle arrest. RRM2 inhibition sensitized pNET cells to radiotherapy and induced apoptosis in vitro. In vivo, we utilized pNET subcutaneous and lung metastasis models to examine the rationale for RNR-targeted therapy and 3-AP as a radiosensitizer in treating pNETs. Combination treatment significantly increased apoptosis of BON (human pNET) xenografts and significantly reduced the burden of lung metastases. Together, our results demonstrate that selective RRM2 inhibition induced radiosensitivity of metastatic pNETs both in vitro and in vivo. Therefore, treatment with the selective RRM2 inhibitor, 3-AP, is a promising radiosensitizer in the therapeutic armamentarium for metastatic pNETs.
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Apoptosis , Proliferación Celular , Ratones Desnudos , Neoplasias Pancreáticas , Tolerancia a Radiación , Fármacos Sensibilizantes a Radiaciones , Ribonucleósido Difosfato Reductasa , Ensayos Antitumor por Modelo de Xenoinjerto , Humanos , Neoplasias Pancreáticas/patología , Neoplasias Pancreáticas/radioterapia , Neoplasias Pancreáticas/genética , Neoplasias Pancreáticas/tratamiento farmacológico , Neoplasias Pancreáticas/enzimología , Ribonucleósido Difosfato Reductasa/genética , Ribonucleósido Difosfato Reductasa/antagonistas & inhibidores , Ribonucleósido Difosfato Reductasa/metabolismo , Animales , Línea Celular Tumoral , Fármacos Sensibilizantes a Radiaciones/farmacología , Apoptosis/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Tolerancia a Radiación/efectos de los fármacos , Fosforilación , Tumores Neuroendocrinos/patología , Tumores Neuroendocrinos/genética , Tumores Neuroendocrinos/radioterapia , Tumores Neuroendocrinos/tratamiento farmacológico , Tumores Neuroendocrinos/enzimología , Tumores Neuroendocrinos/metabolismo , Neoplasias Pulmonares/secundario , Neoplasias Pulmonares/radioterapia , Neoplasias Pulmonares/patología , Neoplasias Pulmonares/genética , Proteínas de la Ataxia Telangiectasia Mutada/antagonistas & inhibidores , Proteínas de la Ataxia Telangiectasia Mutada/metabolismo , Proteínas de la Ataxia Telangiectasia Mutada/genética , Proteínas Supresoras de Tumor/genética , Proteínas Supresoras de Tumor/metabolismo , Transducción de Señal/efectos de los fármacos , Quinasa 1 Reguladora del Ciclo Celular (Checkpoint 1)/antagonistas & inhibidores , Quinasa 1 Reguladora del Ciclo Celular (Checkpoint 1)/metabolismo , Quinasa 1 Reguladora del Ciclo Celular (Checkpoint 1)/genética , Ratones , Quinasa de Punto de Control 2/metabolismo , Quinasa de Punto de Control 2/genética , Quinasa de Punto de Control 2/antagonistas & inhibidores , Femenino , Interferencia de ARN , Proteína Quinasa Activada por ADNRESUMEN
The TEM8 protein represents an emerging biomarker in many solid tumor histologies. Given the various roles it plays in oncogenesis, including but not limited to angiogenesis, epithelial-to-mesenchymal transition, and cell migration, TEM8 has recently served and will continue to serve as the target of novel oncologic therapies. We review herein the role of TEM8 in oncogenesis. We review its normal function, highlight the additional roles it plays in the tumor microenvironment, and synthesize pre-clinical and clinical data currently available. We underline the protein's prognostic and predictive abilities in various solid tumors by (1) highlighting its association with more aggressive disease biology and poor clinical outcomes and (2) assessing its associated clinical trial landscape. Finally, we offer future directions for clinical studies involving TEM8, including incorporating pre-clinical agents into clinical trials and combining previously tested oncologic therapies with currently available treatments, such as immunotherapy.
Asunto(s)
Neoplasias , Receptores de Superficie Celular , Humanos , Receptores de Superficie Celular/metabolismo , Proteínas de Neoplasias/metabolismo , Proteínas de Microfilamentos , Neoplasias/terapia , Transformación Celular Neoplásica , Carcinogénesis , Biología , Microambiente TumoralRESUMEN
BACKGROUND: Large cell neuroendocrine carcinoma (LCNEC) of the lung is a rare, aggressive cancer most commonly found in the lungs but not exclusively, with a worse prognosis than non-small cell lung carcinomas. Currently, LCNEC patients are treated using small cell and non-small cell protocols. This study aims to use the SEER database to identify demographic, clinical, pathological, and therapeutic factors affecting the prognosis and survival of patients with LCNEC of the lung. METHODS: Demographic, clinical, and management data of patients with lung LCNEC were extracted from the SEER database for the period 2000-2018. RESULTS: In the USA, LCNEC has a higher incidence in elderly white men: M:F ratio = 1.2:1, Caucasian: 83.3%, mean age: 67 ± 10.2 years. The most common treatment modality was chemotherapy only: 29.2%, followed by surgery: 21.5% (but in this group the statuses of chemotherapy were unknown), and combination surgery/chemotherapy: 8.8%. The overall and cause-specific 5-year survival was 17.5% (95% CI 16.3-18.8) and 21.9% (95% CI 20.5-23.4), respectively. By treatment, the best 5-year survival was for surgery alone (48%), followed by multimodality therapy (chemo + surgery + radiation) at 35% (95% CI 27-43). Age > 60 years, male gender, size > 7 cm, and nodal and liver metastasis were independent risk factors associated with increased mortality. CONCLUSION: Lung LCNEC is an aggressive neoplasm most common in older white males that presents at an advanced stage despite small primary tumors. Most patients die within 2 years. The best predictor of survival is surgery with chemotherapy. Given its dismal prognosis, new treatment guidelines are needed for this aggressive cancer.
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Carcinoma de Células Grandes , Carcinoma Neuroendocrino , Carcinoma de Pulmón de Células no Pequeñas , Neoplasias Pulmonares , Humanos , Masculino , Anciano , Persona de Mediana Edad , Neoplasias Pulmonares/terapia , Neoplasias Pulmonares/tratamiento farmacológico , Carcinoma Neuroendocrino/terapia , Carcinoma Neuroendocrino/tratamiento farmacológico , Carcinoma de Células Grandes/terapia , Carcinoma de Células Grandes/tratamiento farmacológico , PronósticoRESUMEN
PURPOSE: To develop recommendations for systemic therapy for well-differentiated grade 1 (G1) to grade 3 (G3) metastatic gastroenteropancreatic neuroendocrine tumors (GEP-NETs). METHODS: ASCO convened an Expert Panel to conduct a systematic review of relevant studies and develop recommendations for clinical practice. RESULTS: Eight randomized controlled trials met the inclusion criteria for the systematic review. RECOMMENDATIONS: Somatostatin analogs (SSAs) are recommended as first-line systemic therapy for most patients with G1-grade 2 (G2) metastatic well-differentiated GI-NETs. Observation is an option for patients with low-volume or slow-growing disease without symptoms. After progression on SSAs, peptide receptor radionuclide therapy (PRRT) is recommended as systematic therapy for patients with somatostatin receptor (SSTR)-positive tumors. Everolimus is an alternative second-line therapy, particularly in nonfunctioning NETs and patients with SSTR-negative tumors. SSAs are standard first-line therapy for SSTR-positive pancreatic (pan)NETs. Rarely, observation may be appropriate for asymptomatic patients until progression. Second-line systemic options for panNETs include PRRT (for SSTR-positive tumors), cytotoxic chemotherapy, everolimus, or sunitinib. For SSTR-negative tumors, first-line therapy options are chemotherapy, everolimus, or sunitinib. There are insufficient data to recommend particular sequencing of therapies. Patients with G1-G2 high-volume disease, relatively high Ki-67 index, and/or symptoms related to tumor growth may benefit from early cytotoxic chemotherapy. For G3 GEP-NETs, systemic options for G1-G2 may be considered, although cytotoxic chemotherapy is likely the most effective option for patients with tumor-related symptoms, and SSAs are relatively ineffective. Qualifying statements are provided to assist with treatment choice. Multidisciplinary team management is recommended, along with shared decision making with patients, incorporating their values and preferences, potential benefits and harms, and other characteristics and circumstances, such as comorbidities, performance status, geographic location, and access to care.Additional information is available at www.asco.org/gastrointestinal-cancer-guidelines.