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In this work, the synthesis and characterization of a heterogeneous photocatalyst based on spherical silica nanoparticles superficially modified with anthraquinone 2-carboxylic acid (AQ-COOH) are presented. The nanomaterial was characterized by TEM, SEM, FT-IR, diffuse reflectance, fluorescence, NMR, DLS, XRD and XPS. These analyses confirm the covalent linking of AQ-COOH with the NH2 functionality in the nanomaterial and, more importantly, the photocatalyst retains its photophysical properties once bound. The heterogeneous photocatalyst was successfully employed in the aerobic hydroxylation of arylboronic acids to phenols under sustainable reaction conditions. Phenols were obtained in high yields (up to 100 %) with low catalyst loading (3.5â mol %), reaching TOF values of 3.7â h-1 . Using 2-propanol as solvent at room temperature, the visible light photocatalysis produced H2 O2 as a key intermediate to promote the aerobic hydroxylation of arylboronic acids. The heterogeneous photocatalyst was reused at least 5 times, without modification of the nanomaterial structure and morphology. This simple heterogeneous system showed great catalytic activity under sustainable reaction conditions.
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ATM is an apical kinase of the DNA damage response involved in the repair of DNA double-strand breaks. Germline ATM variants (gATM) have been associated with an increased risk of developing lung adenocarcinoma (LUAD), and approximately 9% of LUAD tumors harbor somatic ATM mutations (sATM). Biallelic carriers of pathogenic gATM exhibit a plethora of immunological abnormalities, but few studies have evaluated the contribution of immune dysfunction to lung cancer susceptibility. Indeed, little is known about the clinicopathological characteristics of lung cancer patients with sATM or gATM alterations. The introduction of targeted therapies and immunotherapies, and the increasing number of clinical trials evaluating treatment combinations, warrants a careful reexamination of the benefits and harms that different therapeutic approaches have had in lung cancer patients with sATM or gATM. This review will discuss the role of ATM in the pathogenesis of lung cancer, highlighting potential therapeutic approaches to manage ATM-deficient lung cancers.
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Adenocarcinoma de Pulmão , Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Humanos , Carcinoma Pulmonar de Células não Pequenas/genética , Carcinoma Pulmonar de Células não Pequenas/terapia , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/terapia , Mutação em Linhagem Germinativa , Células Germinativas , Proteínas Mutadas de Ataxia Telangiectasia/genéticaRESUMO
BACKGROUND: Left bundle branch area pacing (LBBAP) for cardiac resynchronization therapy (CRT) is an alternative to biventricular pacing (BiVp). OBJECTIVES: The purpose of this study was to compare the outcomes between LBBAP and BiVp as an initial implant strategy for CRT. METHODS: In this prospective multicenter, observational, nonrandomized study, first-time CRT implant recipients with LBBAP or BiVp were included. The primary efficacy outcome was a composite of heart failure (HF)-related hospitalization and all-cause mortality. The primary safety outcomes were acute and long-term complications. Secondary outcomes included postprocedural New York Heart Association functional class and electrocardiographic and echocardiographic parameters. RESULTS: A total of 371 patients (median follow-up of 340 days [IQR: 206-477 days]) were included. The primary efficacy outcome occurred in 24.2% in the LBBAP vs 42.4% in the BiVp (HR: 0.621 [95% CI: 0.415-0.93]; P = 0.021) group, driven by a reduction in HF-related hospitalizations (22.6% vs 39.5%; HR: 0.607 [95% CI: 0.397-0.927]; P = 0.021) without significant difference in all-cause mortality (5.5% vs 11.9%; P = 0.19) or differences in long-term complications (LBBAP: 9.4% vs BiVp: 15.2%; P = 0.146). LBBAP resulted in shorter procedural (95 minutes [IQR: 65-120 minutes] vs 129 minutes [IQR: 103-162 minutes]; P < 0.001) and fluoroscopy times (12 minutes [IQR: 7.4-21.1 minutes] vs 21.7 minutes [IQR: 14.3-30 minutes]; P < 0.001), shorter QRS duration (123.7 ± 18 milliseconds vs 149.3 ± 29.1 milliseconds; P < 0.001), and higher postprocedural left ventricular ejection fraction (34.1% ± 12.5% vs 31.4% ± 10.8%; P = 0.041). CONCLUSIONS: LBBAP as an initial CRT strategy resulted in a lower risk of HF-related hospitalizations compared to BiVp. A reduction in procedural and fluoroscopy times, shorter paced QRS duration, and improvements in left ventricular ejection fraction compared with BiVp were observed.
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Terapia de Ressincronização Cardíaca , Insuficiência Cardíaca , Humanos , Terapia de Ressincronização Cardíaca/efeitos adversos , Terapia de Ressincronização Cardíaca/métodos , Volume Sistólico , Estudos Prospectivos , Função Ventricular Esquerda , Resultado do Tratamento , Insuficiência Cardíaca/terapiaRESUMO
Voriconazole (VCZ) is a triazolic drug used to treat serious fungal infections and invasive mycosis and has also been more recently used as a generic antifungal treatment. However, VCZ therapies can cause undesirable side effects and doses must be carefully monitored before administration to avoid or reduce severe toxic effects. Analytical techniques used to quantify VCZ are mostly based on HPLC/UV and often associated with multiple technical steps as well as expensive equipment. The present work aimed to develop an accessible and affordable spectrophotometric technique in the visible range (λ = 514 nm) for the simple quantification of VCZ. The technique was based on VCZ-induced reduction of thionine (TH, red) to leucothionine (LTH, colorless) under alkaline conditions. The reaction showed a linear correlation over the range of 1.00 µg mL-1 to 60.00 µg mL-1 at room temperature, the limits of detection and quantification being 1.93 µg mL-1 and 6.45 µg mL-1, respectively. VCZ degradation products (DPs) according to 1H and 13C-NMR spectrometric determinations not only showed good agreement with the ones previously reported (DP1 and DP2 - T. M. Barbosa, G. A. Morris, M. Nilsson, R. Rittner and C. F. Tormena, RSC Adv., 2017, DOI: 10.1039/c7ra03822d), but also revealed a new degradation product (DP3). Mass spectrometry not only confirmed the presence of LTH as a result of the VCZ DP-induced TH reduction, but also revealed the formation of a novel and stable Schiff base as a reaction product between DP1 and LTH. The latter finding became significant as it stabilizes the reaction for quantification purposes, by hindering LTH âTH redox reversibility. This analytical method was then validated according to the ICH Q2 (R1) guidelines, and additionally, it could be demonstrated as applicable for the reliable VCZ quantification in commercially available tablets. Importantly, it also represents a useful tool for detecting toxic threshold concentrations in human plasma from VCZ-treated patients, alerting when these risky limits are exceeded. In this way, this technique independent from sophisticated equipment, highly qualifies as a low-cost, reproducible, trustable, and non-laborious alternative method for VCZ measurements from different matrices.
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Antifúngicos , Fenotiazinas , Humanos , Voriconazol/uso terapêutico , Preparações Farmacêuticas , Antifúngicos/uso terapêuticoRESUMO
In a broad sense, Rickettsiae are a group of microorganisms that can be transmitted mechanically or biologically to animals and humans. Rickettsioses are associated with hematic manifestations. Its prevalence in humans, dogs and other animals has been widely explored, but not in equine species. To determine the prevalence of Rickettsia infection in horses. A systematic review of the literature was carried out in five databases for the proportion of horses infected with Rickettsia, defined by molecular and immunological techniques. A meta-analysis was performed using a random-effects model to calculate the pooled prevalence and 95% confidence intervals (CI). The Cochran's Q test and the I2 statistic were used to assess the between-study-heterogeneity. The pooled prevalence of Rickettsia in equines was 37.0% (95% CI: 26.0%-47.0%), with significant heterogeneity among studies (I2 = 98.12%). In the subgroup analysis, the prevalence of Rickettsia in horses was found to be 24.0% (95%CI: 10.0%-41.0%) for IFI, 47.0% (95%CI: 30.0%-64.0%) for IFA, 14.0% (95%CI: 11.0%-17.0%) for IFAT and 39.0% (95%CI: 0.0%-95.0%) for PCR. There was a high prevalence of Rickettsia among horses, with some of the species being zoonotic, with their corresponding implications for humans, which increasingly are in close contact with equines, particularly horses and their ticks, posing a risk for spillover and transmission.
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BACKGROUND: Most studies evaluating factors associated with the survival of patients with brain metastases (BM) have focused on patients with newly diagnosed BM. This study aimed to identify prognostic factors associated with survival after brain re-irradiation in order to develop a new prognostic index. METHODS: This 5-year retrospective study included patients treated with repeat-radiotherapy for recurrent BM at the "Instituto Nacional de Cancerología" of Mexico between 2015 and 2019. Significant variables in the multivariate Cox regression analysis were used to create the brain re-irradiation index (BRI). Survival and group comparisons were performed using the Kaplan-Meier method and the log-rank test. RESULTS: Fifty-seven patients receiving brain re-irradiation were identified. Most patients were women (75.4%) with a mean age at BM diagnosis of 51.4 years. Lung and breast cancer were the most prevalent neoplasms (43.9% each). Independent prognostic factors for shorter survival after re-irradiation were: Age >50 years (hazard ratio [HR]:2.5 [95% confidence interval [CI], 1.1-5.8]; p = 0.026), uncontrolled primary tumor (HR:5.5 [95% CI, 2.2-13.5]; p < 0.001), lesion size >20 mm (4.6 [95% CI, 1.7-12.2]; p = 0.002), and an interval <12 months between radiation treatments (HR:4.3 [95% CI, 1.7-10.6]; p = 0.001). Median survival (MS) after re-irradiation was 14.6 months (95% CI, 8.2-20.9).MS of patients stratified according to the BRI score was 17.38, 10.34, and 2.82 months, with significant differences between all groups. CONCLUSIONS: The new BRI can be easily implemented for the prognostic classification of cancer patients with progressive or recurrent BM from extracranial solid tumors.
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Neoplasias Encefálicas , Reirradiação , Humanos , Feminino , Pessoa de Meia-Idade , Masculino , Prognóstico , Estudos Retrospectivos , Neoplasias Encefálicas/patologia , Modelos de Riscos ProporcionaisRESUMO
INTRODUCTION: Therapeutic advances have increased the survival of non-small-cell lung cancer (NSCLC) patients as well as the lifetime risk of being diagnosed with brain metastases (BM). Although BM have historically been associated with poor prognosis, it is unclear whether they remain a strong predictor of reduced survival. This study aimed to evaluate the prognostic value of BM and the utility of the Lung-molGPA. METHODS: This single-center retrospective database analysis included 1,393 NSCLC patients with newly diagnosed BM who registered at the Instituto Nacional de Cancerología of Mexico (INCan) from 2010 to 2020. The Kaplan-Meier method and log-rank test were used for the survival analysis. Survival times were calculated from the date of NSCLC diagnosis (OS), or BM diagnosis, to the date of death or last follow-up. Cox proportional-hazards models were used to calculate the hazard ratio (HR) for death and the significance of the parameters evaluated. RESULTS: Out of 1,058 patients who underwent genetic testing for epidermal growth factor receptor (EGFR) mutations and/or anaplastic lymphoma kinase (ALK) rearrangements, 650 had a positive tumor mutational/rearrangement status (543 had EGFR mutations, 104 had ALK rearrangements, and 3 had both EGFR and ALK alterations). Median OS did not differ between patients with BM and without BM (17.7 months [95% CI, 15.4-19.0] vs. 16.6 months [95% CI, 14.3-19.0]; p = 0.362). In contrast, the presence of BM was associated with worse OS in patients with a negative tumor mutational status (HR: 1.225 [95% CI, 1.041-1.443]; p = 0.015), who did not receive TKI therapy (HR: 1.269 [95% CI, 1.082-1.488]; p = 0.003), or with non-adenocarcinoma histology (HR: 1.582 [95% CI, 1.118-2.238]; p = 0.01). The median survival after BM diagnosis was 4.27, 6.96, 14.68, and 18.89 months for adenocarcinoma patients with Lung-molGPA scores 0-1, 1.5-2, 2.5-3, and 3.5-4, respectively (p < 0.0001). For non-adenocarcinoma patients with Lung-molGPA scores 0-1, 1.5-2, and 2.5-3, the corresponding estimates were 0.95, 2.89, and 9.39 months, respectively (p < 0.0001). CONCLUSIONS: These results show that the prognosis of NSCLC patients with BM is no longer uniformly poor and should be individually assessed. Furthermore, the validity of the Lung-molGPA was confirmed in an independent population from a different geographical region.
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Adenocarcinoma , Neoplasias Encefálicas , Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Adenocarcinoma/secundário , Quinase do Linfoma Anaplásico/genética , Neoplasias Encefálicas/tratamento farmacológico , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/patologia , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/genética , Receptores ErbB/genética , Humanos , Pulmão/patologia , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/patologia , Mutação , Prognóstico , Inibidores de Proteínas Quinases/uso terapêutico , Estudos RetrospectivosRESUMO
BACKGROUND: Few trials have evaluated the utility of liquid biopsies to detect epidermal growth factor receptor mutations (EGFRm) at the time of response evaluation and its association with the clinical characteristics and outcomes of non-small-cell lung cancer (NSCLC) patients. OBJECTIVE: This study aimed to evaluate, in a real-world clinical setting, the prevalence of plasma EGFRm and its association with the clinical characteristics, response and survival outcomes of NSCLC patients under treatment with EGFR-tyrosine kinase inhibitors (EGFR-TKIs). METHODS: This observational study enrolled advanced or metastatic NSCLC patients, with confirmed tumor EGFRm, receiving treatment with first- or second-generation EGFR-TKIs. Blood samples for the detection of plasma EGFRm were collected at the time of response evaluation and processed using the Target Selector™ assay. The main outcomes were the detection rate of plasma EGFRm, median Progression-Free Survival (PFS) and Overall Survival (OS) according to plasma EGFR mutational status. RESULTS: Of 84 patients, 50 (59.5%) had an EGFRm detected in plasma. After a median follow-up of 21.1 months, 63 patients (75%) had disease progression. The detection rate of plasma EGFRm was significantly higher in patients with disease progression than in patients with partial response or stable disease (68.3% versus 33.3%; P< 0.01). PFS and OS were significantly longer in patients without plasma EGFRm than among patients with plasma EGFRm (14.3 months [95% CI, 9.25-19.39] vs 11.0 months [95% CI, 8.61-13.46]; P= 0.034) and (67.8 months [95% CI, 39.80-95.94] vs 32.0 months [95% CI, 17.12-46.93]; P= 0.006), respectively. A positive finding in LB was associated with the presence of ⩾ 3 more metastatic sites (P= 0.028), elevated serum carcinoembryonic (CEA) at disease progression (P= 0.015), and an increase in CEA with respect to baseline levels (P= 0.038). CONCLUSIONS: In NSCLC patients receiving EGFR-TKIs, the detection of plasma EGFRm at the time of tumor response evaluation is associated with poor clinical outcomes.
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Carcinoma Pulmonar de Células não Pequenas/mortalidade , Neoplasias Pulmonares/mortalidade , Inibidores de Proteínas Quinases/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma Pulmonar de Células não Pequenas/sangue , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/genética , Análise Mutacional de DNA , Progressão da Doença , Receptores ErbB/sangue , Receptores ErbB/genética , Feminino , Humanos , Biópsia Líquida , Neoplasias Pulmonares/sangue , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/genética , Masculino , Pessoa de Meia-Idade , Intervalo Livre de Progressão , Inibidores de Proteínas Quinases/farmacologia , Medição de Risco/métodos , Medição de Risco/estatística & dados numéricosRESUMO
Carbon nanostructures have been recently applied to improve industrial manufacturing processes and other materials; such is the case for lubricants used in the metal-mechanic industry. Nanotori are toroidal carbon nanostructures, obtained from chemical treatment of multi-wall carbon nanotubes (MWCNTs). This material has been shown to have superb anti-wear and friction reduction performance, having the ability to homogeneously disperse within water in concentrations between 1-2 wt.%. Obtained results of these novel nanostructures under water mixtures and novel additives were a set point to our studies in different industrial lubricants. In the present work, nanotori structures have been applied in various filler fractions as reinforcement to evaluate the behavior in thermal transport of water-based (WB) and oil-based (OB) lubricants. Temperature-dependent experiments to evaluate the thermal conductivity were performed using a thermal water bath ranging from room temperature up to 323 K. The obtained results showed a highly effective and favorable improvement in the heat transport of both lubricants; oil-based results were better than water-based results, with nanotori structures increasing the lubricants' thermal transport properties by 70%, compared to pure lubricant.
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BACKGROUND: Although chest pain and acute coronary syndrome (ACS) are among the most common complaints in the Emergency Departments (ED), little is known about this topic in the octogenarian population. OBJECTIVES: This study aimed to describe the clinical presentation and to evaluate survival time according to the ACS type in a group of 80-year-old or over patients admitted for chest pain to an ED. METHODS: Patients were classified according to the discharge diagnosis. A multivariable Cox regression analysis was done to assess the association between ACS type and mortality with the non-ACS chest pain group as the reference category. RESULTS: ACS was diagnosed in 170 of the 391 patients analyzed and 51% of ACS patients were female. Within the ACS patients, 18.8% presented STEMI, 57% NSTEMI, and 24% unstable angina (UA). Most of the patients were treated conservatively. In the adjusted analysis, the incidence of death at 40 months of follow-up was higher in patients with STEMI (HR 3.24; CI 1.59-6.56) than NSTEMI (HR 2.53; CI 1.56-4.11). There was no difference between patients with UA and the non-ACS group (HR 0.64; CI 0.26-1.58), and myocardial revascularization was associated with reduced mortality risk (HR 0.45; CI 0.22-0.92). CONCLUSIONS: A high prevalence of ACS was found among octogenarians admitted to the ED with chest pain, and the ACS type behaved as an independent predictor of mortality. Patients with UA diagnosis had a similar prognosis to patients with non-ACS chest pain, but this needs to be demonstrated by a prospective study.
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Síndrome Coronariana Aguda , Síndrome Coronariana Aguda/diagnóstico , Síndrome Coronariana Aguda/epidemiologia , Idoso de 80 Anos ou mais , Angina Instável/diagnóstico , Angina Instável/epidemiologia , Dor no Peito/epidemiologia , Serviço Hospitalar de Emergência , Feminino , Humanos , Estudos ProspectivosRESUMO
In this work, the influence of Sodium Acetate Trihydrate (SAT) on the gelling stage of a chitin hydrogel was studied. Characterization techniques, such as FTIR, Raman, solid-state NMR, Dielectric Spectroscopy, Small-angle X-ray scattering (SAXS), Wide-angle X-ray scattering (WAXS), and X-ray diffraction (XRD) were used to study the effect of SAT on the micro and nanostructure of the material in the wet, dry and freeze-dried states. It was demonstrated that the amount of SAT in the gelling solution can induce a variation in the supramolecular interaction among the polysaccharide chains, which leads to a change in the structural characteristics. In addition, it was observed that the polymer-water interactions are also altered by this structural ordering. Also, the affinity interaction with lysozyme was evaluated and an influence on the adsorption capacity was evidenced with the use of SAT. This could be an advance for biotechnological, biomedical, and food applications.
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Quitina/química , Géis/química , Acetato de Sódio/química , Acetatos/química , Adsorção , Coloides , Liofilização/métodos , Espectroscopia de Ressonância Magnética/métodos , Muramidase/metabolismo , Nanoestruturas/química , Espalhamento a Baixo Ângulo , Difração de Raios X/métodosRESUMO
The current problem related to the supply of drinking water for the metropolitan area of Monterrey, which comprises of five million inhabitants, and the important role played by the El Cuchillo Dam, found downstream of the Santa Catarina River basin as a surface source of drinking water for the city, renders this river an interesting site for assessment. This work evaluates the degree to which the surface water and the subsoil of the river are affected by emerging organic pollutants due to their existence, even at low concentrations, representing a toxic risk enhanced by the absence of stricter standards for regulating these substances. Based on fieldwork, three discharge points that could affect the quality of the surface water were selected: two points on the river stream, and three groundwater wells. Gas chromatography results showed the presence of BisPhenol A (BPA) and bis(2-EthylHexyl) Phthalate (DEHP) in both the surface water and subsoil at different seasons of the year. The highest concentration levels in the samples taken from both types of water were 0.9 and 60 µg L-1 for BPA and DEHP, respectively. Results of this research did not reveal the level at which the aquifer is affected by these substances.
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Compostos Benzidrílicos , Fenóis , Ácidos Ftálicos , Poluentes Químicos da Água , Cidades , Monitoramento Ambiental , MéxicoRESUMO
In this paper, the thermal conductivity behavior of synthetic and natural esters reinforced with 2D nanostructures-single hexagonal boron nitride (h-BN), single molybdenum disulfide (MoS2), and hybrid h-BN/MOS2-were studied and compared to each other. As a basis for the synthesis of nanofluids, three biodegradable insulating lubricants were used: FR3TM and VG-100 were used as natural esters and MIDEL 7131 as a synthetic ester. Two-dimensional nanosheets of h-BN, MoS2, and their hybrid nanofillers (50/50 ratio percent) were incorporated into matrix lubricants without surfactants or additives. Nanofluids were prepared at 0.01, 0.05, 0.10, 0.15, and 0.25 weight percent of filler fraction. The experimental results revealed improvements in thermal conductivity in the range of 20-32% at 323 K with the addition of 2D nanostructures, and a synergistic behavior was observed for the hybrid h-BN/MoS2 nanostructures.
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The evolution of polyphenolic compounds and sensory properties of wines obtained from Grenache grapes, either untreated or treated with pulsed electric fields (PEF), in the course of bottle aging, as well as during oak aging followed by bottle aging, were compared. Immediately prior to aging in bottles or in barrels, enological parameters that depend on phenolic extraction during skin maceration were higher when grapes had been treated with PEF. In terms of color intensity, phenolic families, and individual phenols, the wine obtained with grapes treated by PEF followed an evolution similar to untreated control wine in the course of aging. Sensory analysis revealed that the application of a PEF treatment resulted in wines that are sensorially different: panelists preferred wines obtained from grapes treated with PEF. Physicochemical and sensory analyses showed that grapes treated with PEF are suitable for obtaining wines that require aging in bottles or in oak barrels.
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The chemical composition of groundwater is a product of the evolution and transformation of major ions, which come from natural hydrogeochemical processes or from anthropogenic interference. The objective of this study was to identify the hydrogeochemical processes and the influence of anthropogenic activity on the variation of chemical composition in Toluca Valley groundwater. The type of water in the zone is fundamentally Mg-Ca-HCO3. Three groups with different evolutionary tendencies were identified: one within a local recharge zone and two others in an intermediate region with anthropic activity. The latter, which show contamination by inorganic matter (fertilizers) and organic matter (urban or industrial wastewater). The content of N-NO3- (0.024-0.219 mEq L-1), N-NH4+ (0-0.022 mEq L-1), Porg (0.03-1.02 mEq L-1) and PO43- (0.0-0.28 mEq L-1) indicated contamination coming from inorganic and organic matter. These chemical compounds were identified by way of a 3D fluorescence technique. The results of this study demonstrate that the main processes that affect and control the chemical composition of the water in the Toluca Valley aquifer are weathering of silicates, the ion exchange and a mixture process generated by a source of anthropic contamination.
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Monitoramento Ambiental/métodos , Fertilizantes/análise , Água Subterrânea/química , Águas Residuárias/análise , Poluentes Químicos da Água/análise , Poços de Água , México , Águas Residuárias/química , Tempo (Meteorologia)RESUMO
Omics technologies have revolutionised fundamental and medical research. Oncology is perhaps the field where these technologies have been most rapidly adopted and where they have had their biggest impact, dramatically transforming clinical practice guidelines over a very short period of time. Along with this transformation has come an even larger array of technologies, tools and jargon, that make following the most recent developments in the field a truly daunting task for those not involved in it. This chapter is intended to provide a general overview of evolving topics in oncology research in the era of big data analysis and precision medicine, with a specific focus on the use of tumour biomarkers, tumour biomarker tests, targeted drugs and the changing landscape of clinical trial designs.
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Oncologia , Neoplasias , Biomarcadores Tumorais , Ensaios Clínicos como Assunto , Humanos , Oncologia/tendências , Medicina de Precisão/tendênciasRESUMO
Genetically modified (GM) maize has been grown and safely consumed on a global scale since its commercialization in 1996. However, questions have been raised about the potential impact that GM maize could have on native maize landraces in Mexico, which is the center of origin and diversity of maize. This research was conducted to evaluate potential changes to maize landraces in an unlikely event of transgene introgression. For this study, two GM traits that confer insect protection and herbicide tolerance in maize (MON 89034 and MON 88017), designated as VT3Pro, were introgressed into two Mexican landraces, Tuxpeño and Tabloncillo. Field trials were conducted across four environments to assess phenotypic characteristics, plant response to stressors, and kernel composition of landraces with and without VT3Pro traits. Furthermore, materials from four backcrossing generations were analyzed for segregation of these GM traits. Generally, no significant differences were observed between landraces with and without VT3Pro traits for the evaluated characteristics and the segregation analysis showed that GM traits, when introgressed into landraces, followed Mendelian principles. These results support the conclusion that, if inadvertently introgressed into landraces, VT3Pro traits are not expected to alter phenotypic or kernel characteristics, plant response to stressors (except for targeted insect protection and herbicide tolerance traits) and would segregate like any endogenous gene. These results should be taken into consideration when discussing benefits and risks associated with commercial production of GM maize hybrids in the centers of origin and diversity of maize.
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Produtos Agrícolas/genética , Resistência a Herbicidas/genética , Plantas Geneticamente Modificadas/genética , Zea mays/genética , Fluxo Gênico/genética , Herbicidas/efeitos adversos , Herbicidas/farmacologia , Humanos , México , Plantas Geneticamente Modificadas/crescimento & desenvolvimento , Sementes/genética , Zea mays/crescimento & desenvolvimentoRESUMO
Resumen La ovariohisterectomía en perras es un procedimiento quirúrgico de esterilización frecuente. Sin embargo, se pueden presentar complicaciones a corto y largo plazo que son necesarias conocer. Esta revisión sistemática tiene como objetivo identificar las complicaciones por ovariohisterectomía en perras, analizando la calidad metodológica de los estudios que aportan estos datos. Se identificaron 40 estudios publicados en español, inglés y portugués mediante búsqueda electrónica en PubMed, Medwell Journals, SciELO, Science Direct y Google Académico. Se seleccionaron seis estudios descriptivos de complicaciones por ovariohisterectomía en perras. Se excluyeron los estudios sobre complicaciones con metodologías no comparables. Se apreció heterogeneidad en las características y calidad de los estudios. La mayoría utilizó muestreo por conveniencia, en el que el número de participantes varió entre los estudios desde 72 a 1880. Las unidades de análisis fueron hembras caninas de seis a 108 meses de razas puras y cruces. El periodo de seguimiento de los pacientes para la valoración de complicaciones varió desde una semana hasta diez años. La proporción de complicaciones se situó entre 0,1 y 74 %. Los principales eventos reportados son los que se presentan a corto plazo como las complicaciones anestésicas, hemorragias e inflamación de la herida; a largo plazo está la incontinencia urinaria, piómetra y obesidad. Se concluye que la evidencia científica disponible sobre complicaciones en perras esterilizadas mediante ovariohisterectomía no es suficiente como respaldo para la toma de decisiones en la práctica clínica de esta especie respecto al tema abordado.
Resumo A ovário-histerectomia em cadelas é um procedimento cirúrgico de esterilização frequente. No entanto, é necessário saber que podem ocorrer complicações a curto e longo prazo. Esta revisão sistemática tem como objetivo identificar as complicações por ovário-histerectomia em cadelas, analisando a qualidade metodológica dos estudos que fornecem estes dados. Foram identificados 40 estudos publicados em espanhol, inglês e português mediante busca eletrônica em Pub Med, Medwell Journals, Scielo, Science Direct e Google Academic. Foram selecionados seis estudos descritivos de complicações por ovário-histerectomia em cadelas. Foram excluídos os estudos sobre complicações com metodologias não comparáveis. Foi observada heterogeneidade nas características e qualidade dos estudos. A maioria utilizou amostragem por conveniência, onde o número de participantes apresentou variação de estudos entre 72 a 1880. As unidades de análises foram fêmeas caninas de seis a 108 meses de raças e cruzamentos puros. O período de seguimento dos pacientes para a valoração de complicações variou desde uma semana até dez anos. A proporção de complicações se situou entre 0,1 e 74 %. Os principais eventos relatados são os que se apresentam a curto prazo como as complicações anestésicas, hemorragias e inflamação da ferida; a longo prazo está a incontinência urinária, piometra e obesidade. Se conclui que a evidência científica disponível sobre complicações em cadelas esterilizadas mediante ovário histerectomia não é suficiente como respaldo para a tomada de decisões na prática clínica desta espécie com relação ao tema abordado.
Abstract Ovariohysterectomy in female dogs is a frequent surgical procedure for sterilization. However, there might be short-term and long-term complications that are necessary to know. This systematic review aims to identify complications of ovariohysterectomy in dogs, analyzing the methodological quality of the studies that provide data. 40 studies published in Spanish, English, and Portuguese were identified through an electronic search in Pub Med, Medwell Journals, Scielo, Science Direct, and Google Academic. Six descriptive studies on the complications of canine ovariohysterectomy were selected. Studies on complications with non-comparable methodologies were excluded. Heterogeneity was observed in the characteristics and quality of the studies. The majority used convenience sampling, in which the number of participants varied between 72 and 1880. The analysis units were purebred and crossbred canine females from 6 to 108 months of age. The follow-up period of patients for the assessment of complications varied from one week to ten years. The proportion of complications ranged from 0.1 to 74%. The main events reported in the studies occur in short term periods, such as anesthetic complications, bleeding, and wound inflammation. In the long term, there is urinary incontinence, pyometra, and obesity. It is concluded that the scientific evidence available on complications in dogs sterilized by ovariohysterectomy is not enough to support decision-making in the clinical practice with respect to the topic addressed.
RESUMO
Polymorphonuclear-MDSC (PMN-MDSC) have emerged as an independent prognostic factor for survival in NSCLC. Similarly, cytokine profiles have been used to identify subgroups of NSCLC patients with different clinical outcomes. This prospective study investigated whether the percentage of circulating PMN-MDSC, in conjunction with the levels of plasma cytokines, was more informative of disease progression than the analysis of either factor alone. We analyzed the phenotypic and functional profile of peripheral blood T-cell subsets (CD3+, CD3+CD4+ and CD3+CD8+), neutrophils (CD66b+) and polymorphonuclear-MDSC (PMN-MDSC; CD66b+CD11b+CD15+CD14-) as well as the concentration of 14 plasma cytokines (IL-1ß, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12 p70, IL-17A, IL-27, IL-29, IL-31, and IL-33, TNF-α, IFN-γ) in 90 treatment-naïve NSCLC patients and 25 healthy donors (HD). In contrast to HD, NSCLC patients had a higher percentage of PMN-MDSC and neutrophils (P < 0.0001) but a lower percentage of CD3+, CD3+CD4+ and CD3+CD8+ cells. PMN-MDSC% negatively correlated with the levels of IL1-ß, IL-2, IL-27 and IL-29. Two groups of patients were identified according to the percentage of circulating PMN-MDSC. Patients with low PMN-MDSC (≤ 8%) had a better OS (22.1 months [95% CI 4.3-739.7]) than patients with high PMN-MDSC (9.3 months [95% CI 0-18.8]). OS was significantly different among groups of patients stratified by both PMN-MDSC% and cytokine levels. In sum, our findings provide evidence suggesting that PMN-MDSC% in conjunction with the levels IL-1ß, IL-27, and IL-29 could be a useful strategy to identify groups of patients with potentially unfavorable prognoses.