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1.
Klin Onkol ; 38(3): 178-183, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38960673

RESUMEN

BACKGROUND: Regardless of cancer type or stage of treatment, physical activity (PA) has been shown to reduce the risk of cancer recurrence and death. It is associated with a range of positive effects on patients' physical and psychological well-being, particularly in the areas of aerobic fitness, fatigue, mental health and perceived overall quality of life. However, in current oncology practice, the combination of its indication with treatment is still relatively rare. At the same time, cancer patients' participation in regular physical activity is usually very low. However, as PA is an effective method to support cancer treatment and plays an important role in prevention, it is necessary to find effective strategies to involve patients more widely in physical activities. To this end, physical activity programmes organised directly by facilities providing comprehensive cancer care appear to be very suitable. PURPOSE: This literature review maps the main barriers and facilitators to cancer patients' participation in physical activity programmes. In particular, economic factors related to health policy, reflected in the availability of this type of supportive care for patients, the level of health literacy, the organization of PA programs, health care providers - both physicians and health care workers, social support and intrapsychic influences on the part of patients play a major role. Since the implementation of physical activity programmes into the existing cancer care system is a rather challenging process, the paper also deals with the possibilities of using the Health Belief Model. In the given context, this model allows the prediction and identification of barriers and supportive factors to patients' involvement in PA programs in order to maximize their effectiveness and adapt them to the needs of patients and, at the same time, to the capabilities of a specific medical facility.


Asunto(s)
Ejercicio Físico , Neoplasias , Humanos , Neoplasias/psicología , Neoplasias/terapia , Apoyo Social , Calidad de Vida
2.
BMJ Mil Health ; 2024 May 06.
Artículo en Inglés | MEDLINE | ID: mdl-38719228

RESUMEN

INTRODUCTION: Sexually transmitted infections (STIs) are an everlasting health issue globally. The military environment is recognised as a high-risk setting. Human papillomavirus (HPV), Chlamydia trachomatis and Neisseria gonorrhoeae are the most frequent STIs worldwide. This prospective cross-sectional pilot study focuses on the prevalence of selected STIs in the female population of the Czech Republic's Armed Forces. METHODS: C. trachomatis, N. gonorrhoeae and HPV detection and genotyping were performed between August 2020 and December 2022 in 141 women. Participants were divided into three groups according to their military status-recruits (n=72), active soldiers (n=25) and control civilian group (n=44). Cervical smear tests were performed, and data on STI risk factors were obtained through a questionnaire. RESULTS: A significant difference in the HPV prevalence between recruits (64.5 %) and both active soldiers (46.4 %) and civilians (47.3 %) was found when adjusted for age (p=0.007 and p=0.01, respectively). Lower age of coitarche (median 16; p=0.005) and smaller agglomeration origin (p=0.013) were reported for military recruits. No difference was proven in other researched risk factors. Associations between HPV detection and the higher number of sexual partners (p=0.013), early coitarche (p=0.016) and single marital status (p=0.002) across the groups were observed. Not a single case of N. gonorrhoeae was detected in any of the 141 participants. The prevalence of C. trachomatis did not differ significantly between the three evaluated groups-recruits, control civilian group, and active soldiers (5.6%, 2.3%, 0%, respectively; p=0.567). CONCLUSIONS: This pilot study showed a significantly higher HPV prevalence in female military recruits compared with both active military and civilian women. Recruits reported earlier coitarche which is a strong STI risk factor. Further study is needed to expand on the findings of this pilot study and generate data to support adjustment of STI preventive measures within the Czech Republic Armed Forces.

3.
Klin Onkol ; 37(6): 473-476, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38158237

RESUMEN

Commentary on the newly released European Society for Medical Oncology (ESMO) guidelines for the diagnosis and treatment of metastatic colorectal cancer (mCRC). After 6 years, individual chapters have been updated, from molecular tumor testing to diagnostic and treatment procedures to the implementation of newly registered medicinal products. The authors highlight the most important changes in the guidelines. Awareness of possible new treatments for mCRC is important to determine the treatment strategy for patients with mCRC. In this commentary, we focus primarily on the status of systemic treatment in unresectable disease.


Asunto(s)
Neoplasias del Colon , Neoplasias Colorrectales , Neoplasias del Recto , Humanos , Neoplasias Colorrectales/tratamiento farmacológico , Oncología Médica
4.
Klin Onkol ; 36(2): 104-111, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37072244

RESUMEN

BACKGROUND: Hepatocellular carcinoma is the most common malignant liver tumor in adults and thermal ablation and transarterial embolization are important methods of therapy. Thermal ablation can be used in early stages. Methods based on the transarterial approach, especially transarterial chemoembolization, play an important role in intermediate stage diseases. The success of procedures depends not only on the biological nature and the size of the tumor, on the technical design of the procedure and on the patient's response to treatment, but also on the molecular changes associated with these procedures. In addition to classic predictive and prognostic factors including age, patient comorbidities, Child-Pugh score, tumor characteristics, presence of large surrounding vessels, and portal vein thrombosis, molecular prognostic and predictive factors (serum biomarkers) are often mentioned in studies. Currently, only a-fetoprotein is routinely used as a prognostic biomarker; however, there are studies referring to new serum biomarkers that can potentially help to classical markers and imaging methods to determine the cancer prognosis and predict the success of therapy. These biomarkers most often include g-glutamyltranspeptidase, des- g-carboxyprothrombin, some types of microRNAs, inflammatory and hypoxic substances, whose serum levels are changed by the intervention therapies. Evaluation of these molecules could lead to the optimization of the medical intervention (choice of therapy method, timing of treatment) or change the management of patient follow-up after interventions. Although several biomarkers have shown promising results, most serum biomarkers still require validation in phase III studies. PURPOSE: The aim of this work is to present a comprehensive overview of classical and molecular biomarkers that could potentially help in the prognostic stratification of patients and better predict the success and effect of radiological intervention methods.


Asunto(s)
Carcinoma Hepatocelular , Quimioembolización Terapéutica , Neoplasias Hepáticas , Adulto , Humanos , Carcinoma Hepatocelular/diagnóstico por imagen , Carcinoma Hepatocelular/terapia , Carcinoma Hepatocelular/patología , Pronóstico , Neoplasias Hepáticas/diagnóstico por imagen , Neoplasias Hepáticas/terapia , Neoplasias Hepáticas/patología , Resultado del Tratamiento , Quimioembolización Terapéutica/métodos , Estudios Retrospectivos , Biomarcadores
5.
Math Biosci ; 350: 108854, 2022 08.
Artículo en Inglés | MEDLINE | ID: mdl-35659615

RESUMEN

We predict the future course of ongoing susceptible-infected-susceptible (SIS) epidemics on regular, Erdos-Rényi and Barabási-Albert networks. It is known that the contact network influences the spread of an epidemic within a population. Therefore, observations of an epidemic, in this case at the population-level, contain information about the underlying network. This information, in turn, is useful for predicting the future course of an ongoing epidemic. To exploit this in a prediction framework, the exact high-dimensional stochastic model of an SIS epidemic on a network is approximated by a lower-dimensional surrogate model. The surrogate model is based on a birth-and-death process; the effect of the underlying network is described by a parametric model for the birth rates. We demonstrate empirically that the surrogate model captures the intrinsic stochasticity of the epidemic once it reaches a point from which it will not die out. Bayesian parameter inference allows for uncertainty about the model parameters and the class of the underlying network to be incorporated directly into probabilistic predictions. An evaluation of a number of scenarios shows that in most cases the resulting prediction intervals adequately quantify the prediction uncertainty. As long as the population-level data is available over a long-enough period, even if not sampled frequently, the model leads to excellent predictions where the underlying network is correctly identified and prediction uncertainty mainly reflects the intrinsic stochasticity of the spreading epidemic. For predictions inferred from shorter observational periods, uncertainty about parameters and network class dominate prediction uncertainty. The proposed method relies on minimal data at population-level, which is always likely to be available. This, combined with its numerical efficiency, makes the proposed method attractive to be used either as a standalone inference and prediction scheme or in conjunction with other inference and/or predictive models.


Asunto(s)
Epidemias , Teorema de Bayes , Susceptibilidad a Enfermedades , Humanos , Incertidumbre
6.
Epidemiol Infect ; 150: e104, 2022 05 16.
Artículo en Inglés | MEDLINE | ID: mdl-35570648

RESUMEN

Lockdowns have been a core infection control measure in many countries during the coronavirus disease 2019 (COVID-19) pandemic. In England's first lockdown, children of single parent households (SPHs) were permitted to move between parental homes. By the second lockdown, SPH support bubbles between households were also permitted, enabling larger within-household networks. We investigated the combined impact of these approaches on household transmission dynamics, to inform policymaking for control and support mechanisms in a respiratory pandemic context. This network modelling study applied percolation theory to a base model of SPHs constructed using population survey estimates of SPH family size. To explore putative impact, varying estimates were applied regarding extent of bubbling and proportion of different-parentage within SPHs (DSPHs) (in which children do not share both the same parents). Results indicate that the formation of giant components (in which COVID-19 household transmission accelerates) are more contingent on DSPHs than on formation of bubbles between SPHs, and that bubbling with another SPH will accelerate giant component formation where one or both are DSPHs. Public health guidance should include supportive measures that mitigate the increased transmission risk afforded by support bubbling among DSPHs. Future network, mathematical and epidemiological studies should examine both independent and combined impact of policies.


Asunto(s)
COVID-19 , COVID-19/epidemiología , COVID-19/prevención & control , Niño , Control de Enfermedades Transmisibles , Inglaterra/epidemiología , Composición Familiar , Humanos , Políticas , Padres Solteros
7.
ESMO Open ; 7(3): 100474, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-35576697

RESUMEN

BACKGROUND: Fatigue is one of the most common adverse effects associated with cancer immunotherapy using checkpoint inhibitors (CPIs). Because treatment-related fatigue also frequently occurs in patients treated with non-immunological therapies, our study aimed to compare the incidence of fatigue in CPI-treated patients with that associated with non-immune therapies in randomised trials. METHODS: PubMed and ClinicalTrials.gov were searched for phase III studies using a CPI alone or in combination with chemotherapy or non-immunologic targeted therapy in the experimental arm and control arm using inactive therapies such as placebo or observation, chemotherapy, or non-immunologic targeted therapy. Adverse events listed in the full texts as well as those available from clinicaltrials.gov were reviewed for all identified studies. RESULTS: A total of 60 studies involving 41 435 patients were included in the analysis. All-grade fatigue was reported in 30.4% of patients [95% confidence interval (CI) 29.9% to 31.0%] in the immunotherapy arms of the analysed studies. Using anti-programmed cell death protein 1 agents as reference, the odds ratio (OR) for fatigue was significantly higher both for anti-cytotoxic T lymphocyte-associated antigen 4 agents (OR 1.46, 95% CI 1.04-2.04) and the combination of anti-cytotoxic T lymphocyte-associated antigen 4 and anti-programmed cell death protein agents (OR 1.43, 95% CI 1.12-1.83). Fatigue was significantly less likely to occur in patients treated with CPI compared with patients receiving chemotherapy (OR 0.79, 95% CI 0.73-0.85), but significantly was more common in patients receiving the combination of CPI/chemotherapy compared with patients receiving chemotherapy alone (OR 1.12, 95% CI 1.03-1.22). CONCLUSIONS: Although immunotherapy using CPIs was associated with treatment-related fatigue, the occurrence of all-grade fatigue was significantly higher in patients treated with chemotherapy compared with patients receiving CPIs. The risk of fatigue was higher for CPI/chemotherapy combinations than for chemotherapy alone. These results suggest that although the effects of CPIs and chemotherapy are additive, chemotherapy was the dominant cause of treatment-related fatigue in the analysed trials.


Asunto(s)
Inhibidores de Puntos de Control Inmunológico , Neoplasias , Fatiga/inducido químicamente , Fatiga/epidemiología , Humanos , Inhibidores de Puntos de Control Inmunológico/efectos adversos , Inmunoterapia/efectos adversos , Inmunoterapia/métodos , Incidencia , Neoplasias/tratamiento farmacológico
8.
Klin Onkol ; 34(Supplementum 1): 20-28, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34154326

RESUMEN

Nowadays, selection of appropriate therapy in patients with lung cancer is based on comprehensive molecular characteristics of their tumors. On molecular level, lung cancer is one of the best described solid tumors. Currently, there are already methods in routine clinical practice that enable a relatively quick, accurate and cost-effective analysis of dozens of genes and thus make it possible to determine a complex molecular characteristic of a tumor. This creates new possibilities to tailor the treatment to the patients to achieve long-term survival with a good quality of life. New technologies bring more and more information and to transform it into the best clinical benefit for the patient can be challenging. This is a place for the multidisciplinary approach in the form of a molecular tumor board. Its role is to try to indicate appropriate therapy based on the identified genetic alteration. Today, dozens of targeted drugs are available and new treatment options are emerging even for genetic alterations, which until now seemed to be undruggable.


Asunto(s)
Comunicación Interdisciplinaria , Neoplasias Pulmonares/terapia , Grupo de Atención al Paciente/organización & administración , Medicina de Precisión , Calidad de Vida , Humanos
9.
Klin Onkol ; 34(Supplementum 1): 54-64, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34154331

RESUMEN

Immunotherapy with check-point inhibitors has demonstrated remarkable therapeutic benefits in many oncological diagnoses, including non-small cell lung cancer (NSCLC). Based on the data from clinical trials, it has become an important part of the NSCLC treatment algorithm. Treatment with programmed cell death protein 1 / programmed death-ligand 1 inhibitors can be indicated in various ways: as monotherapy or combination of immunotherapy with cytotox--ic T-lymphocyte antigen 4 inhibitors or in combination with other treatment modalities - chemotherapy, antiangiogenic therapy and radiotherapy. Regarding new spectrum of immune-related side effects, which require quick diagnosis and treatment, there is great urge to identify immunotherapy predictive biomarkers.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas/terapia , Inmunoterapia/métodos , Neoplasias Pulmonares/terapia , Carcinoma de Pulmón de Células no Pequeñas/inmunología , Carcinoma de Pulmón de Células no Pequeñas/patología , Humanos , Neoplasias Pulmonares/inmunología , Neoplasias Pulmonares/patología
10.
Poult Sci ; 100(5): 101052, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33773159

RESUMEN

Fowl adenoviruses (FAdV), detected during routine diagnostic investigations from 38 countries (5 continents) over a decade, were partially sequenced and grouped by phylogenetic analysis. The partial polymerase gene nucleotide sequences of the 365 fowl adenovirus isolates resulted in the following species distribution: 11% FAdV-A; 3% FAdV-B; 2% FAdV-C; 34% FAdV-D; and 50% FAdV-E. Noticeably, only 79 of the detected strains could be associated with adenovirus-specific pathologic conditions: 62 (79%) with inclusion body hepatitis; 9 (11%) with gizzard erosion; and 8 (10%) with hepatitis hydropericardium syndrome. The remainder of the FAdV strains was detected as concomitant infection from other disease conditions almost exclusively in boilers of 27 to 42 d of age: the majority of them was FAdV-E followed by FAdV-D, and to a lesser extent of FAdV-A, B, and C, the latter ones have not been associated with any of the established adenovirus-caused syndromes in our collection. The highest ratio of coinfections was observed for FAdV-B (62%), while it was about 30% for the rest of the FAdV species. The most frequent coinfection, in connection with all FAdV species, was with the avian infectious bronchitis virus. The presented database will serve as the basis for comparative whole genome and cross-neutralization analysis of selected FAdV isolates.


Asunto(s)
Infecciones por Adenoviridae , Aviadenovirus , Enfermedades de las Aves de Corral , Adenoviridae , Infecciones por Adenoviridae/epidemiología , Infecciones por Adenoviridae/veterinaria , Animales , Aviadenovirus/genética , Pollos , Filogenia , Enfermedades de las Aves de Corral/epidemiología
11.
Sci Rep ; 10(1): 18779, 2020 11 02.
Artículo en Inglés | MEDLINE | ID: mdl-33139773

RESUMEN

Using the continuous-time susceptible-infected-susceptible (SIS) model on networks, we investigate the problem of inferring the class of the underlying network when epidemic data is only available at population-level (i.e., the number of infected individuals at a finite set of discrete times of a single realisation of the epidemic), the only information likely to be available in real world settings. To tackle this, epidemics on networks are approximated by a Birth-and-Death process which keeps track of the number of infected nodes at population level. The rates of this surrogate model encode both the structure of the underlying network and disease dynamics. We use extensive simulations over Regular, Erdos-Rényi and Barabási-Albert networks to build network class-specific priors for these rates. We then use Bayesian model selection to recover the most likely underlying network class, based only on a single realisation of the epidemic. We show that the proposed methodology yields good results on both synthetic and real-world networks.


Asunto(s)
Enfermedades Transmisibles/epidemiología , Simulación por Computador , Epidemias/estadística & datos numéricos , Redes Neurales de la Computación , Población , Teorema de Bayes , Humanos , Modelos Estadísticos
12.
Klin Onkol ; 32(Suppl 1): 174-176, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31064193

RESUMEN

BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) is the most common malignancy of pancreas, characterized by extremely poor prognosis largely due to problem with early diagnosis and lack of progress in personalization of therapy. Of all available treatment strategies, radical surgical resection of the tumour in its early stage remains the only possibility how to reach long-term survival. However, even a technically perfect surgical resection may still not provide a survival benefit for all PDAC patients. Appropriate selection of patients for surgical resection is one the important medical needs in management of PDAC patients. MATERIAL AND METHODS: To this study we enrolled 24 PDAC patients who underwent surgical resection and preoperatively collected their blood plasma specimends. Patients were divided into to two prognostic groups according to their overall survival - 12 patients with poor prognosis (median overall survival 10 months) and 12 patients with good prognosis (median overall survival 25 months). Small RNA sequencing technology was applied to screen for microRNAs (miRNA) with differential levels between both PDAC patients group. cDNA libraries were prepared using QIAseq miRNA Library Kit (Qiaqen) and sequencing by NextSeq500 instrument (Illumina). RESULTS: When miRNA expression profiles of the PDAC patients from good and poor prognostic groups were compared, 61 miRNAs were identified to have significantly different plasma levels between the two groups (p < 0.05). A total of 21 miRNAs showed increased expression and 40 miRNAs showed decreased expression in a group of patients with poor prognosis compared to patients with good prognosis. CONCLUSION: This study demonstrated differences in miRNA expression profiles in preoperative plasma specimens of PDAC patients with short and long overall survival. Our observations indicate that after independent validations plasma miRNAs might become useful biomarkers for identification of PDAC patients having clinical benefit from surgical resection of the tumour. This work was supported by Czech Ministry of Health, grant No. 16-31314A. All rights reserved. The authors declare they have no potential confl icts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE recommendation for biomedical papers. Submitted: 8. 3. 2019 Accepted: 9. 3. 2019.


Asunto(s)
Biomarcadores de Tumor/sangre , Carcinoma Ductal Pancreático/patología , MicroARNs/sangre , Neoplasias Pancreáticas/patología , Cuidados Preoperatorios , Biomarcadores de Tumor/genética , Carcinoma Ductal Pancreático/sangre , Carcinoma Ductal Pancreático/genética , Carcinoma Ductal Pancreático/cirugía , Regulación Neoplásica de la Expresión Génica , Humanos , MicroARNs/genética , Neoplasias Pancreáticas/sangre , Neoplasias Pancreáticas/genética , Neoplasias Pancreáticas/cirugía , Pronóstico , Tasa de Supervivencia , Neoplasias Pancreáticas
13.
Phys Rev E ; 97(4-1): 042306, 2018 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-29758745

RESUMEN

The spread of an infectious disease is known to change people's behavior, which in turn affects the spread of disease. Adaptive network models that account for both epidemic and behavioral change have found oscillations, but in an extremely narrow region of the parameter space, which contrasts with intuition and available data. In this paper we propose a simple susceptible-infected-susceptible epidemic model on an adaptive network with time-delayed rewiring, and show that oscillatory solutions are now present in a wide region of the parameter space. Altering the transmission or rewiring rates reveals the presence of an endemic bubble-an enclosed region of the parameter space where oscillations are observed.

14.
Proc Math Phys Eng Sci ; 474(2210): 20170695, 2018 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-29507514

RESUMEN

We present the generalized mean-field and pairwise models for non-Markovian epidemics on networks with arbitrary recovery time distributions. First we consider a hyperbolic partial differential equation (PDE) system, where the population of infective nodes and links are structured by age since infection. We show that the PDE system can be reduced to a system of integro-differential equations, which is analysed analytically and numerically. We investigate the asymptotic behaviour of the generalized model and provide an implicit analytical expression involving the final epidemic size and pairwise reproduction number. As an illustration of the applicability of the general model, we recover known results for the exponentially distributed and fixed recovery time cases. For gamma- and uniformly distributed infectious periods, new pairwise models are derived. Theoretical findings are confirmed by comparing results from the new pairwise model and explicit stochastic network simulation. A major benefit of the generalized pairwise model lies in approximating the time evolution of the epidemic.

15.
Klin Onkol ; 30(Supplementum3): 62-65, 2017.
Artículo en Checo | MEDLINE | ID: mdl-29239195

RESUMEN

BACKGROUND: The lower part of the digestive tract includes the large intestine, rectum and anus. Treatment algorithms of cancers in these localities have significant differences in both early and advanced stages. The vast majority of metastatic cases are incurable. A few years ago, it was generally accepted that gastrointestinal tumors are poorly immunogenic and modern immunotherapy would not work in gastrointestinal cancers. The breakthrough has become the recognition of the mismatch repair system (MMR) that affects the microsatellite instability (MSI) and its role in the development of colorectal carcinoma (CRC). Metastatic colorectal carcinoma (mCRC) with defect MMR (dMMR) and MSI-H, resp. is immunogenic and can be a target of modern imunotherapy directed on the PD1/PD-L1 axis. Such a treatment can improve prognosis and life quality od patients with mCRC MSI-H. Immunotherapy effectiveness was shown also in a subgroup of patients with a BRAF mutation where the effectiveness of existing systemic treatment is low. The proven predictive factor is dMMR/MSI-H. PD-1 expression does not have this significance. Results of clinical studies with nivolumab and pembrolizumab result in the inclusion of these drugs in mCRC treatment algorithms. Phase II study shows nivolumab effectiveness also in pretreated metastatic anal cancer. PURPOSE: An overview of basic information on the possibilities of immunotherapy in CRC and anal cancers.Key words: cancer immunotherapy - checkpoint inhibitors - colorectal cancer - anal cancer - nivolumab - pembrolizumab Supported by MH CZ - DRO (MMCI, 00209805) I declare that, in connection with the abovementioned contribution, which I am an author, I have a conflict of interest with the following companies: BMS, Roche, Merck, Amgem and Bayer. The author declares he has no potential conflicts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE recommendation for biomedical papers.Submitted: 7. 9. 2017Accepted: 5. 11. 2017.


Asunto(s)
Neoplasias del Ano/terapia , Neoplasias Colorrectales/terapia , Inmunoterapia , Neoplasias del Ano/genética , Antígeno B7-H1/antagonistas & inhibidores , Neoplasias Colorrectales/genética , Reparación de la Incompatibilidad de ADN , Humanos , Inestabilidad de Microsatélites , Receptor de Muerte Celular Programada 1/antagonistas & inhibidores
16.
Oncol Lett ; 14(1): 743-750, 2017 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-28693229

RESUMEN

Bevacizumab is a humanized anti-vascular endothelial growth factor monoclonal antibody, used in combination with a oxaliplatin-based chemotherapy in the treatment of metastatic colorectal cancer (mCRC). The aim of the present study was to identify microRNA (miRNA)-based predictive biomarkers of therapy response in order to avoid unnecessary and costly therapy to non-responding patients. High-throughput miRNA microarray profiling (Affymetrix miRNA array) was performed on a discovery cohort of patients with mCRC. The discovery cohort was (n=20) divided into either responding (n=10) or non-responding (n=10) groups of bevacizumab/5-flourouracil, leucovorin, oxaliplatin (FOLFOX) treatment according to Response Evaluation Criteria in Solid Tumors criteria. Validation of candidate miRNAs was performed on an independent cohort of 41 patients with mCRC using quantitative reverse transcription polymerase chain reaction. Normalized data were subjected to receiver operating characteristic and Kaplan-Meier analyses. In total, 67 miRNAs were identified to be differentially expressed when miRNA expression was compared between responding and non-responding patients to bevacizumab/FOLFOX treatment (P<0.05). A total of 7 miRNAs were chosen for independent validation, which confirmed significantly higher expression of miR-92b-3p, miR-3156-5p, miR-10a-5p and miR-125a-5p (P<0.005) in tumor tissue of responding patients compared with non-reponding patients. Using the combination of miRNAs, the present study identified responders to the therapy with sensitivity 82% and specificity 64% (area under the curve = 0.8015). In conclusion, 4 predictive miRNAs associated with progression-free survival (PFS) were identified in patients with mCRC treated with bevacizumab/FOLFOX. Following further independent validations, detection of these miRNA may enable identification of patients with mCRC who may potentially benefit from the therapy.

17.
J Theor Biol ; 407: 387-400, 2016 10 21.
Artículo en Inglés | MEDLINE | ID: mdl-27423527

RESUMEN

This paper presents a compact pairwise model describing the spread of multi-stage epidemics on networks. The multi-stage model corresponds to a gamma-distributed infectious period which interpolates between the classical Markovian models with exponentially distributed infectious period and epidemics with a constant infectious period. We show how the compact approach leads to a system of equations whose size is independent of the range of node degrees, thus significantly reducing the complexity of the model. Network clustering is incorporated into the model to provide a more accurate representation of realistic contact networks, and the accuracy of proposed closures is analysed for different levels of clustering and number of infection stages. Our results support recent findings that standard closure techniques are likely to perform better when the infectious period is constant.


Asunto(s)
Enfermedades Transmisibles/epidemiología , Epidemias , Modelos Biológicos , Análisis por Conglomerados , Simulación por Computador , Humanos , Análisis Numérico Asistido por Computador
18.
Physiol Int ; 103(3): 334-343, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28229641

RESUMEN

It has been reported that some of the food additives may cause sensitization, inflammation of tissues, and potentially risk factors in the development of several chronic diseases. Thus, we hypothesized that expressions of common inflammatory molecules - known to be involved in the development of various inflammatory conditions and cancers - are affected by these food additives. We investigated the effects of commonly used food preservatives and artificial food colorants based on the expressions of NFκB, GADD45α, and MAPK8 (JNK1) from the tissues of liver. RNA was isolated based on Trizol protocol and the activation levels were compared between the treated and the control groups. Tartrazine alone could elicit effects on the expressions of NFκB (p = 0.013) and MAPK8 (p = 0.022). Azorubine also resulted in apoptosis according to MAPK8 expression (p = 0.009). Preservatives were anti-apoptotic in high dose. Sodium benzoate (from low to high doses) dose-dependently silenced MAPK8 expression (p = 0.004 to p = 0.002). Addition of the two preservatives together elicited significantly greater expression of MAPK8 at half-fold dose (p = 0.002) and at fivefold dose (p = 0.008). This study suggests that some of the food preservatives and colorants can contribute to the activation of inflammatory pathways.


Asunto(s)
Proteínas de Ciclo Celular/genética , Aditivos Alimentarios/farmacología , Expresión Génica/efectos de los fármacos , Proteína Quinasa 8 Activada por Mitógenos/genética , FN-kappa B/genética , Proteínas Nucleares/genética , Animales , Proteínas de Ciclo Celular/metabolismo , Femenino , Colorantes de Alimentos/farmacología , Conservantes de Alimentos/farmacología , Masculino , Ratones , Proteína Quinasa 8 Activada por Mitógenos/metabolismo , FN-kappa B/metabolismo , Naftalenosulfonatos/farmacología , Proteínas Nucleares/metabolismo , Benzoato de Sodio/farmacología , Ácido Sórbico/farmacología , Tartrazina/farmacología
19.
Eur J Cancer Care (Engl) ; 25(1): 57-68, 2016 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-26059166

RESUMEN

An anonymous questionnaire survey was conducted among the Hungarian adolescents to establish their use of tobacco, alcohol and drugs in relation to sexual behaviours, knowledge of human papillomavirus (HPV) and cervical cancer, and beliefs and attitudes towards screening and vaccination. Results indicated that adolescent risk-taking health behaviours correlate with risky sexual behaviours. As risk-taking behaviours do not correlate with a better awareness of the risk associated with HPV infection, it is of crucial importance that HPV/cervical cancer preventing educational programmes shall be sensitive to this 'vulnerable' population and draw the attention of these adolescents to their increased risk of sexually transmitted diseases and undesired pregnancies. Well-designed behavioural change interventions may be effective when in addition to providing adolescents (both men and women) with clear information about the implications of an HPV infection, they also aim to improve safer sex behaviours: consistent condom usage, limiting the number of sex partners, as well as encouraging regular participation in gynaecological screenings and uptake of the HPV vaccine. As this study population demonstrated positive attitudes towards the primary and secondary prevention of cervical cancer, the free HPV vaccination for the 12-13-year-old girls in Autumn 2014 will hopefully increase the currently low uptake of the vaccine in Hungary.


Asunto(s)
Conductas Relacionadas con la Salud , Infecciones por Papillomavirus/prevención & control , Asunción de Riesgos , Conducta Sexual/estadística & datos numéricos , Neoplasias del Cuello Uterino/prevención & control , Adolescente , Conducta del Adolescente , Femenino , Conocimientos, Actitudes y Práctica en Salud , Humanos , Hungría/epidemiología , Masculino , Aceptación de la Atención de Salud/estadística & datos numéricos , Parejas Sexuales , Factores Socioeconómicos , Trastornos Relacionados con Sustancias/epidemiología , Adulto Joven
20.
J Hum Hypertens ; 30(7): 449-55, 2016 07.
Artículo en Inglés | MEDLINE | ID: mdl-26424101

RESUMEN

Measures of small and large artery dysfunction have not been investigated in a single cohort for the prediction of cardiovascular (CV) events in patients with nondialysed (ND) chronic kidney disease (CKD). This prospective cohort study aimed to determine whether central pulse wave velocity (cPWV), central pulse pressure (CPP) or microvascular post-occlusive reactive hyperaemia area (PORHHA) independently predict CV events and mortality in CKD-ND. A total of 94 stage 1-5 CKD-ND (65.3±13.1 years; estimated glomerular filtration rate 35.3 (22.8-49.4) ml min(-1) per 1.73 m(2)) patients were followed-up for a median of 52 (36-65) months and had baseline cPWV and CPP measured by applanation tonometry and PORHHA by laser Doppler flowmetry. Multiple failure time Cox regression models were used to determine the predictive role of vascular parameters on CV mortality and events. Based on multiple linear regressions, baseline age, diabetes, CV disease, and systolic blood pressure (SBP) were independently related to cPWV (R(2)=0.3), SBP and PORHHA to CPP (R(2)=0.45), whereas CPP was the only parameter independently related to PORHHA (R(2)=0.16, all P<0.05). During follow-up, 41 CV events occurred (14 CV deaths). In univariate analyses, cPWV (1.07 (1.02-1.13) per m s(-1)), CPP (1.04 (1.01-1.07) per mm Hg) and lnPORHHA (0.70 (0.58-0.85) per ln(PU × s)) were all related to the outcome. Baseline diabetes (HR 3.07 (1.65-5.68)), lnFGF23 (fibroblast growth factor-23; 1.86 (1.13-3.06) per RU ml(-1)) and CPP (1.04 (1.01-1.07) per mm Hg) were independent predictors of CV events. The impaired pulsatile component of large arteries (CPP) independently of other vascular markers (cPWV, PORHHA) predicted CV outcomes in CKD-ND. CPP may integrate the information provided by cPWV and PORHHA.


Asunto(s)
Presión Sanguínea , Tasa de Filtración Glomerular , Riñón/fisiopatología , Microcirculación , Insuficiencia Renal Crónica/fisiopatología , Rigidez Vascular , Anciano , Enfermedades Cardiovasculares/diagnóstico , Enfermedades Cardiovasculares/etiología , Enfermedades Cardiovasculares/mortalidad , Enfermedades Cardiovasculares/fisiopatología , Estudios Transversales , Femenino , Humanos , Hiperemia/fisiopatología , Masculino , Persona de Mediana Edad , Análisis Multivariante , Pronóstico , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Flujo Pulsátil , Análisis de la Onda del Pulso , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/diagnóstico , Insuficiencia Renal Crónica/mortalidad , Factores de Riesgo , Índice de Severidad de la Enfermedad , Factores de Tiempo
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