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1.
J Pers Med ; 14(4)2024 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-38673000

RESUMO

Scabies is a neglected tropical disease and represents a considerable global burden. Although consensus diagnostic criteria for scabies have been recently published, diagnosing scabies infestation remains challenging in clinical practice. We investigated the diagnostic utility of complete blood cell count (CBC) and CBC-derived ratios obtained at diagnosis in a set of 167 patients who are Vietnamese with confirmed scabies. These parameters were compared with those of patients with dermatophytosis (N = 800) and urticaria (N = 2023), two diseases frequent in Vietnam, which can present with similar skin manifestations to scabies and tend to pose a diagnostic challenge in vulnerable populations. Our analysis revealed that white blood cell, monocyte, and eosinophil counts were significantly higher among patients with scabies than the other two diseases. Similarly, the monocyte-to-lymphocyte ratio (MLR) and eosinophil-to-lymphocyte ratio (ELR) were significantly higher among patients with scabies. The optimal cut-off values to distinguish scabies from dermatophytosis and urticaria were 0.094 for ELR (sensitivity: 74.85%, specificity: 70.7%) and 0.295 for MLR (sensitivity: 52.69%, specificity: 73.54%). CBC, ELR, and MLR are low-cost and easily calculated parameters that may be helpful for the diagnosis of scabies.

2.
Pathogens ; 12(12)2023 Dec 08.
Artigo em Inglês | MEDLINE | ID: mdl-38133311

RESUMO

Cholangiocarcinoma encompasses a heterogeneous group of highly aggressive malignancies, arising from the biliary tract, that are often associated with poor survival rates [...].

3.
J Pers Med ; 13(12)2023 Dec 18.
Artigo em Inglês | MEDLINE | ID: mdl-38138952

RESUMO

BACKGROUND: Familial hypercholesterolemia (FH) is an inherited metabolic disorder characterized by high levels of low-density lipoprotein cholesterol (LDL-c) from birth. About 85% of all FH cases are caused by pathogenic variants in the LDLR gene. Individuals with FH have increased cardiovascular risk, including a high risk of premature myocardial infarction (PMI). METHODS: We conducted an opportunistic exome screening to identify variants in the LDLR gene among Vietnamese patients with PMI treated at a general hospital in southern Vietnam. A cascade testing for LDLR variants was conducted in their relatives within three generations, and the effects of the LDLR variant on the response to rosuvastatin treatment were also studied using a comparative before-and-after study design on those who were eligible. RESULTS: A total of 99 participants from the three generations of four PMI patients were recruited, mean age 37.3 ± 18.5 years, 56.6% males. Sanger sequencing revealed two variants in the LDLR gene: variant rs577934998 (c.664T>C), detected in 17 individuals within one family, and variant rs12710260 (c.1060+10G>C), found in 32 individuals (49.5%) in the other three families tested. Individuals harboring the variant c.664T>C had significantly higher baseline LDL-c and total cholesterol levels compared to those with variant c.1060+10G>C (classified as benign) or those without LDLR variants, and among the 47 patients subjected to a 3-month course of rosuvastatin therapy, those with variant c.664T>C had a significantly higher risk of not achieving the LDL-c target after the course of treatment compared to the c.1060+10G>C carriers. CONCLUSIONS: These findings provide evidence supporting the existence of pathogenic LDLR variants in Vietnamese patients with PMI and their relatives and may indicate the need for personalizing lipid-lowering therapies. Further studies are needed to delineate the extent and severity of the problem.

4.
Antibiotics (Basel) ; 12(6)2023 Jun 16.
Artigo em Inglês | MEDLINE | ID: mdl-37370383

RESUMO

Several studies have reported an increased frequency of colonization and/or infection with antibiotic-resistant bacteria (ARB) during the COVID-19 pandemic. Extended-spectrum beta-lactamase-producing Enterobacterales (ESBL-PE) are a group of bacteria with intrinsic resistance to multiple antibiotics, including penicillins, cephalosporins, and monobactams. These pathogens are easy to spread and can cause difficult-to-treat infections. Here, we summarize the available evidence on the impact of the COVID-19 pandemic on infections caused by ESBL-PE. Using specific criteria and keywords, we searched PubMed, MEDLINE, and EMBASE for articles published up to 30 March 2023 on potential changes in the epidemiology of ESBL-E since the beginning of the COVID-19 pandemic. We identified eight studies that documented the impact of COVID-19 on ESBL-E. Five studies were focused on assessing the frequency of ESBL-PE in patient-derived specimens, and three studies investigated the epidemiological aspects of ESBL-PE infections in the context of the COVID-19 pandemic. Some of the studies that were focused on patient specimens reported a decrease in ESBL-PE positivity during the pandemic, whereas the three studies that involved patient data (1829 patients in total) reported a higher incidence of ESBL-PE infections in patients hospitalized for COVID-19 compared with those with other conditions. There are limited data on the real impact of the COVID-19 pandemic on the epidemiology of ESBL-PE infections; however, patient-derived data suggest that the pandemic has exacerbated the spread of these pathogens.

7.
Biochem Biophys Res Commun ; 626: 156-166, 2022 10 20.
Artigo em Inglês | MEDLINE | ID: mdl-35994825

RESUMO

We previously reported that the antipsychotic drug chlorpromazine (CPZ), which inhibits the formation of clathrin-coated vesicles (CCVs) essential for endocytosis and intracellular transport of receptor tyrosine kinase (RTK), inhibits the growth/survival of acute myeloid leukemia cells with mutated RTK (KIT D816V or FLT3-ITD) by perturbing the intracellular localization of these molecules. Here, we examined whether these findings are applicable to epidermal growth factor receptor (EGFR). CPZ dose-dependently inhibited the growth/survival of the non-small cell lung cancer (NSCLC) cell line, PC9 harboring an EGFR-activating (EGFR exon 19 deletion). In addition, CPZ not only suppressed the growth/survival of gefitinib (GEF)-resistant PC9ZD cells harboring T790 M, but also restored their sensitivities to GEF. Furthermore, CPZ overcame GEF resistance caused by Met amplification in HCC827GR cells. As for the mechanism of CPZ-induced growth suppression, we found that although CPZ hardly influenced the phosphorylation of EGFR, it effectively reduced the phosphorylation of ERK and AKT. When utilized in combination with trametinib (a MEK inhibitor), dabrafenib (an RAF inhibitor), and everolimus (an mTOR inhibitor), CPZ suppressed the growth of PC9ZD cells cooperatively with everolimus but not with trametinib or dabrafenib. Immunofluorescent staining revealed that EGFR shows a perinuclear pattern and was intensely colocalized with the late endosome marker, Rab11. However, after CPZ treatment, EGFR was unevenly distributed in the cells, and colocalization with the early endosome marker Rab5 and EEA1 became more apparent, indicating that CPZ disrupted the intracellular transport of EGFR. These results suggest that CPZ has therapeutic potential for NSCLC with mutated EGFR by a novel mechanism different from conventional TKIs alone or in combination with other agents.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Apoptose , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/genética , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Linhagem Celular Tumoral , Clorpromazina/farmacologia , Resistencia a Medicamentos Antineoplásicos , Receptores ErbB/metabolismo , Everolimo/farmacologia , Gefitinibe/farmacologia , Gefitinibe/uso terapêutico , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/metabolismo , Mutação , Inibidores de Proteínas Quinases/farmacologia , Inibidores de Proteínas Quinases/uso terapêutico , Quinazolinas/farmacologia
8.
Pathogens ; 11(7)2022 Jun 24.
Artigo em Inglês | MEDLINE | ID: mdl-35889968

RESUMO

The emergence of carbapenem-resistant Enterobacteriaceae (CRE) is an important public health issue worldwide, not only due to the potential of these pathogens for widespread dissemination, but also due to the limited antimicrobial therapy options, and the elevated mortality rates associated with these infections. As with other multidrug-resistant organisms (MDROs), active surveillance via timely testing, early diagnosis, and contact isolation is an important strategy to control the occurrence and spread of CRE bacteria. Here we summarize the epidemiology of CRE infections in Japan from 2015 to 2019. Data were extracted from a public dataset collected by the nationwide surveillance system via the National Institute of Infectious Diseases (NIID) of Japan. The annual number of reported CRE infections has remained relatively stable, with a tendency to increase in the last two years (1671 cases reported in 2015 and 2333 cases reported in 2019). The majority of patients who presented CRE infections over this five year period were older than 65 years (~80%, mean age 75), 60% of them were men, and mortality rates were around 3.5%. Importantly, about 60% of infections are caused by both Enterobacter cloacae and Klebsiella aerogenes (previously known as Enterobacter aerogenes), the former being the most common pathogen in 2015 and 2016 (~30%), and the latter the leading pathogen since 2017 (~40%). The most common carbapenemase isolated was the IMP carbapenemase type. Further studies are needed to determine the prevalence of CRE colonization, especially in the healthcare setting, and to elucidate the mechanisms behind the local predominance of Klebsiella aerogenes and Enterobacter cloacae.

9.
J Infect ; 84(6): 749-759, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35461908

RESUMO

The prevalence of Carbapenem-resistant Enterobacteriaceae (CRE) has increased dramatically in recent years and has become a global public health issue. Since carbapenems are considered the last drugs of choice, infections caused by these pathogens are difficult to treat and carry a high risk of mortality. Several antibiotic combination regimens have been utilized for the management of CRE infections or to eradicate colonization in CRE carriers with variable clinical responses. In addition, recent studies have explored the use of fecal microbiota transplantation (FMT) to eradicate CRE infections. Here, we conducted a systematic review of publications in which FMT was used to eliminate CRE colonization in infected individuals. We searched the PubMed, Cochrane, and Medline databases up to November 30, 2021. Ten studies (209 patients) met the inclusion criteria for this review with three articles describing retrospective cohorts (n = 53 patients) and seven reporting prospective data (n = 156 patients), including one randomized open-label clinical trial. All studies were published between 2017 and 2021 with eight studies from Europe and two from South Korea. There were substantial variations in terms of outcome measurements and study endpoint among these studies. Among the 112 FMT recipients with confirmed CRE colonization, CRE decolonization was reported in 55/90 cases at one month after FMT and at the end of the study follow-up (6-12 months), decolonization was documented in 74/94 (78.7%) patients. The predominant CRE strains reported were Klebsiella pneumoniae and Escherichia coli and the most frequently documented carbapenemases were KPC, OXA-48, and NDM. In general, FMT was well tolerated, with no severe complications reported even in immunosuppressed patients and in those with multiple underlying conditions. In conclusion, FMT appears to be safe and effective in eradicating CRE colonization, however, more studies, especially randomized trials, are needed to validate the safety and clinical utility of FMT for CRE eradication.


Assuntos
Enterobacteriáceas Resistentes a Carbapenêmicos , Infecções por Enterobacteriaceae , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Portador Sadio , Infecções por Enterobacteriaceae/terapia , Escherichia coli , Transplante de Microbiota Fecal/efeitos adversos , Humanos , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto , Estudos Retrospectivos
10.
Int J Hematol ; 115(3): 336-349, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-35133572

RESUMO

Side population (SP) is known to include therapy-resistant cells in various cancers. Here, we analyzed SP using multiple myeloma (MM) samples. The SP accounted for 2.96% in MM cells from newly diagnosed MM (NDMM). CD34 was expressed in 47.8% of SP cells, but only in 2.11% of bulk MM cells. CD34+ MM cells expressed more immature cell surface markers and a gene signature than CD34- MM cells. CD34+ but not CD34- MM cells possessed clonogenic activities and showed long-term self-renewal activities in xenotransplantation assays. Similarly, whereas 2.20% of MM cells were CD34+ in NDMM (n = 38), this proportion increased to 42.6% in minimal residual disease (MRD) samples (n = 16) (p < 0.001) and to 17.7% in refractory/relapsed MM (RRMM) (n = 30) (p < 0.01). Cell cycle analysis showed that 24.7% of CD34+ MM cells from NDMM were in G0 phase while this proportion was 54.9% in MRD (p < 0.05) and 14.5% in RRMM, reflecting the expansion of MM. Together, CD34+ MM cells with long-term self-renewal activities persist as MRD in cell cycle quiescence or remain as therapy-resistant cells in RRMM, substantiating the necessity of targeting this population to improve clinical outcomes of MM.


Assuntos
Antígenos CD34/genética , Antígenos CD34/metabolismo , Ciclo Celular , Autorrenovação Celular , Mieloma Múltiplo/genética , Mieloma Múltiplo/patologia , Neoplasia Residual/patologia , Animais , Resistencia a Medicamentos Antineoplásicos , Feminino , Expressão Gênica/genética , Humanos , Camundongos Endogâmicos NOD , Camundongos Knockout , Mieloma Múltiplo/tratamento farmacológico , Transplante de Neoplasias , Células Tumorais Cultivadas
11.
Cancer Sci ; 113(2): 660-673, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34837284

RESUMO

We previously examined the utility of rituximab-bendamustine (RB) in patients with follicular lymphoma (FL) exhibiting less than optimal responses to 2 cycles of the R-CHOP chemotherapy regimen. The aim of this study was to identify molecular biomarkers that can predict prognosis in RB-treated patients in the context of the prospective cohort. We first analyzed the mutational status of 410 genes in diagnostic tumor specimens by target capture and Sanger sequencing. CREBBP, KMT2D, MEF2B, BCL2, EZH2, and CARD11 were recurrently mutated as reported before, however none was predictive for progression-free survival (PFS) in the RB-treated patients (n = 34). A gene expression analysis by nCounter including 800 genes associated with carcinogenesis and/or the immune response showed that expression levels of CD8+ T-cell markers and half of the genes regulating Th1 and Th2 responses were significantly lower in progression of disease within the 24-mo (POD24) group (n = 8) than in the no POD24 group (n = 31). Collectively, we selected 10 genes (TBX21, CXCR3, CCR4, CD8A, CD8B, GZMM, FLT3LG, CD3E, EOMES, GZMK), and generated an immune infiltration score (IIS) for predicting PFS using principal component analysis, which dichotomized the RB-treated patients into immune IIShigh (n = 19) and IISlow (n = 20) groups. The 3-y PFS rate was significantly lower in the IISlow group than in the IIShigh group (50.0% [95% CI: 27.1-69.2%] vs. 84.2% [95% CI: 58.7-94.6%], P = .0237). Furthermore, the IIS was correlates with absolute lymphocyte counts at diagnosis (r = 0.460, P = .00355). These results suggest that the T-cell-associated immune markers could be useful to predict prognosis in RB-treated FL patients. (UMIN:000 013 795, jRCT:051 180 181).


Assuntos
Linfócitos do Interstício Tumoral/metabolismo , Linfoma Folicular/imunologia , Linfócitos T/metabolismo , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Cloridrato de Bendamustina/uso terapêutico , Biomarcadores Tumorais/genética , Feminino , Perfilação da Expressão Gênica , Humanos , Contagem de Linfócitos , Linfoma Folicular/sangue , Linfoma Folicular/tratamento farmacológico , Linfoma Folicular/genética , Masculino , Pessoa de Meia-Idade , Mutação , Prognóstico , Intervalo Livre de Progressão , Rituximab/uso terapêutico , Falha de Tratamento , Microambiente Tumoral/imunologia
12.
Int J Mol Sci ; 22(21)2021 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-34769275

RESUMO

NLR family pyrin domain-containing 3 (NLRP3) is an intracellular protein that after recognizing a broad spectrum of stressors, such as microbial motifs and endogenous danger signals, promotes the activation and release of the pro-inflammatory cytokines IL-1ß and IL-18, thus playing an essential role in the innate immune response. Several blood cell types, including macrophages, dendritic cells, and hematopoietic stem and progenitor cells (HSPCs), express NLRP3, where it has been implicated in various physiological and pathological processes. For example, NLRP3 participates in the development and expansion of HSPCs, and their release from bone marrow into the peripheral blood has been implicated in certain hematological disorders including various types of leukemia. In addition, accumulating evidence indicates that activation of NLRP3 plays a pivotal role in the development of transplant complications in patients receiving hematopoietic stem cell transplantation (HSCT) including graft versus host disease, severe infections, and transplant-related mortality. The majority of these complications are triggered by the severe tissue damage derived from the conditioning regimens utilized in HSCT which, in turn, activates NLRP3 and, ultimately, promotes the release of proinflammatory cytokines such as IL-1ß and IL-18. Here, we summarize the implications of NLRP3 in HSCT with an emphasis on the involvement of this inflammasome component in transplant complications.


Assuntos
Transplante de Células-Tronco Hematopoéticas , Células-Tronco Hematopoéticas/metabolismo , Proteína 3 que Contém Domínio de Pirina da Família NLR/metabolismo , Transdução de Sinais , Animais , Humanos , Interleucina-18/metabolismo , Interleucina-1beta/metabolismo , Leucemia/metabolismo , Leucemia/terapia
13.
Microorganisms ; 9(10)2021 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-34683414

RESUMO

Human papillomaviruses (HPVs) are the most common sexually transmitted pathogens worldwide and among the more than 200 identified HPV types, approximately 15 high risk (HR-HPV) types are oncogenic, being strongly associated with the development of cervical cancer, anogenital cancers and an increasing fraction of head and neck squamous cell carcinomas (HNSCC). HPV-associated cervix cancer accounts for 83% of HPV-attributable cancers, and more than two-thirds of those cases occur in developing countries. Despite the high frequency of HPV infections, in most cases, the virus is cleared by the host immune response and only a small proportion of infected individuals develop persistent infections that can result in malignant transformation, indicating that other elements, including biological, genetic and environmental factors may influence the individual susceptibility to HPV-associated cancers. Previous studies have quantified that heritability, in the form of genetic variants, common in the general population, is implicated in nearly 30% of cervical cancers and a large number of studies conducted across various populations have identified genetic variants that appear to be associated with genes that predispose or protect the host to HPV infections thereby affecting individual susceptibility to HPV-associated cancers. In this article, we provide an overview of gene association studies on HPV-associated cancers with emphasis on genome-wide association study (GWAS) that have identified novel genetic factors linked to HPV infection or HPV-associated cancers.

14.
Leuk Res Rep ; 15: 100256, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34194969

RESUMO

Acute myeloid leukemia (AML) is a heterogeneous disease often associated with poor prognosis. We previously showed that the localization of KIT-D816V at endolysosomes is critical to activate aberrant Akt signaling and Chlorpromazine (CPZ) perturbs the intracellular localization, leading to cell death in AML cells with KIT-D816V. We report that daily administration of CPZ, prescribed for controlling anxiety disorder in patient with AML harboring KIT-D816V, led to a dramatic reduction in AML cells. In vitro and in vivo experiments showed that CPZ inhibited the growth and survival of the patient-derived AML cells, implying potent efficacy of CPZ in AML with KIT-D816V.

15.
Int J Hematol ; 114(2): 205-216, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33864623

RESUMO

The aim of this trial is to evaluate the utility of rituximab-bendamustine (R-B) for untreated advanced follicular lymphoma (FL) showing non-optimal response (nOR) to R-CHOP, and to identify clinical prognostic factors for FL patients receiving R-B. Patients who failed to achieve complete response/complete response unconfirmed (CR/CRu) [nOR-group] after 2 cycles of R-CHOP subsequently received 6 cycles of R-B. The primary endpoint was the 3-year progression-free survival (PFS) rate. Secondary endpoints included determination of prognostic factors. Fifty-six patients initially received R-CHOP, 43/56 patients (76.8%) were judged as nOR, and 33/43 patients (76.7%) completed 6 cycles of R-B. At a median follow-up of 50.6 months in the nOR-group, the 3-year PFS rate was 69.0%, and the 3-year overall survival (OS) rate was 92.7%. The most common toxicities associated with R-B were grade 3-4 lymphopenia (93.0%) and neutropenia (74.4%), both of which were manageable. A multivariate analysis including dose intensity, serum soluble interleukin-2 receptor, and FL international prognostic index-2 revealed low absolute lymphocyte count (< 869/µL) at diagnosis was an independent poor prognostic factor for both PFS and OS in the R-B-treated nOR-group. This result was further confirmed in validation cohorts including R-B-treated de novo (n = 40) and relapsed (n = 49) FL patients.


Assuntos
Contagem de Linfócitos , Linfoma Folicular/sangue , Linfoma Folicular/mortalidade , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Cloridrato de Bendamustina/administração & dosagem , Biomarcadores , Ensaios Clínicos Fase II como Assunto , Gerenciamento Clínico , Feminino , Humanos , Estimativa de Kaplan-Meier , Linfoma Folicular/diagnóstico , Linfoma Folicular/terapia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Rituximab/administração & dosagem , Adulto Jovem
16.
J Pers Med ; 11(3)2021 Mar 22.
Artigo em Inglês | MEDLINE | ID: mdl-33809858

RESUMO

Chronic kidney disease (CKD) constitutes a major health problem and one of the leading causes of death worldwide. Patients with CKD have impaired immune functions that predispose them to an increased risk of infections, as well as virus-associated cancers and a diminished vaccine response. In this study, we aimed to identify clinical and laboratory parameters associated with in-hospital mortality in patients evaluated in the department of emergency (ER) and admitted with the diagnosis of severe acute respiratory syndrome (SARS) caused by coronavirus disease 2019 (COVID-19) at the Baptist Hospital of Nicaragua (BHN). There were 37 patients with CKD, mean age 58.3 ± 14.1 years, admitted to BHN due to COVID-19, and among them, 24 (65.7%) were males (p = 0.016). During hospitalization, 23 patients with CKD (62.1%) died of complications associated with COVID-19 disease, which was a higher proportion (odds ratio (OR) 5.6, confidence interval (CI) 2.1-15.7, p = 0.001) compared to a group of 70 patients (64.8% males, mean age 57.5 ± 13.7 years) without CKD admitted during the same period in whom 28.5% died of COVID-19. In the entire cohort, the majority of patients presented with bilateral pneumonia, and the most common symptoms at admission were dyspnea, cough, and fever. Serum levels of D-dimer, ferritin and procalcitonin were significantly higher in patients with CKD compared with those without CKD. Multivariate analysis revealed that CKD, age (>60 years), and hypoxia measured in the ER were factors associated with increased in-hospital mortality. Among patients with CKD but not in those without CKD (OR 36.8, CI 1.5-88.3, p = 0.026), an increased monocytes-to-lymphocyte ratio (MLR) was associated with higher mortality and remained statistically significant after adjusting for confounders. The MLR measured in the ER may be useful for predicting in-hospital mortality in patients with CKD and COVID-19 and could contribute to early risk stratification in this group.

17.
J Cancer Res Clin Oncol ; 147(3): 713-723, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33392659

RESUMO

BACKGROUND: Nasopharyngeal carcinoma (NPC) is a rare epithelial carcinoma arising from the nasopharyngeal region. The pathogenesis of NPC is linked to Epstein-Barr virus (EBV) infection, although genetics and lifestyle factors appears to be also implicated. NKG2D is an immunoreceptor expressed by NK and T-cell subsets that recognizes MICA protein and other ligands on tumor cells. NKG2D interaction with MICA plays a role in the immunosurveillance to viruses and cancer. METHODS: We investigated potential associations between functional polymorphisms in NKG2D and MICA genes with NPC susceptibility. We conducted a case-control study including 255 Vietnamese patients with EBV + non-differentiated NPC and 220 healthy controls. RESULTS: We observed a significant association between the LNK/LNK genotype of rs1049174 (a variant associated with lower NKG2D receptor expression and reduced NK cell cytotoxicity) and increased susceptibility to NPC (adjusted OR = 1.66, 95% CI 1.07-2.59; p = 0.024). Similarly, the AA genotype of MICA rs2596542 was significantly associated with NPC (adjusted OR = 2.12; 95% CI 1.22-3.81; p = 0.009). In addition, tumor specimens of NPC patients with the AA genotype displayed a higher expression level of MICA proteins and showed higher EBV titers compared with tumor tissues from patients with the GG or GA genotypes. Higher EBV copy numbers were also observed in tumors with the A allele of MICA rs1051792 (also known as MICA-129 Met/Val) compared with those with the G allele; however, MICA rs1051792 variants were not associated with NPC susceptibility. These results suggest that genetic variants in components of the NKG2D axis may influence the individual susceptibility to EBV-induced NPC.


Assuntos
Infecções por Vírus Epstein-Barr/genética , Subfamília K de Receptores Semelhantes a Lectina de Células NK/genética , Carcinoma Nasofaríngeo/virologia , Neoplasias Nasofaríngeas/virologia , Adulto , Estudos de Casos e Controles , DNA Viral/análise , Infecções por Vírus Epstein-Barr/imunologia , Infecções por Vírus Epstein-Barr/patologia , Feminino , Predisposição Genética para Doença , Variação Genética , Herpesvirus Humano 4/genética , Herpesvirus Humano 4/isolamento & purificação , Antígenos de Histocompatibilidade Classe I/biossíntese , Antígenos de Histocompatibilidade Classe I/genética , Antígenos de Histocompatibilidade Classe I/imunologia , Humanos , Imuno-Histoquímica , Células Matadoras Naturais/imunologia , Masculino , Pessoa de Meia-Idade , Subfamília K de Receptores Semelhantes a Lectina de Células NK/imunologia , Carcinoma Nasofaríngeo/genética , Carcinoma Nasofaríngeo/imunologia , Carcinoma Nasofaríngeo/patologia , Neoplasias Nasofaríngeas/genética , Neoplasias Nasofaríngeas/imunologia , Neoplasias Nasofaríngeas/patologia , Polimorfismo de Nucleotídeo Único
18.
J Clin Med ; 9(12)2020 Nov 27.
Artigo em Inglês | MEDLINE | ID: mdl-33261057

RESUMO

Nearly one-quarter of all cancer deaths worldwide are due to lung cancer, making this disease the leading cause of cancer death among both men and women. The most important determinant of survival in lung cancer is the disease stage at diagnosis, thus developing an effective screening method for early diagnosis has been a long-term goal in lung cancer care. In the last decade, and based on the results of large clinical trials, lung cancer screening programs using low-dose computer tomography (LDCT) in high-risk individuals have been implemented in some clinical settings, however, this method has various limitations, especially a high false-positive rate which eventually results in a number of unnecessary diagnostic and therapeutic interventions among the screened subjects. By using complex algorithms and software, artificial intelligence (AI) is capable to emulate human cognition in the analysis, interpretation, and comprehension of complicated data and currently, it is being successfully applied in various healthcare settings. Taking advantage of the ability of AI to quantify information from images, and its superior capability in recognizing complex patterns in images compared to humans, AI has the potential to aid clinicians in the interpretation of LDCT images obtained in the setting of lung cancer screening. In the last decade, several AI models aimed to improve lung cancer detection have been reported. Some algorithms performed equal or even outperformed experienced radiologists in distinguishing benign from malign lung nodules and some of those models improved diagnostic accuracy and decreased the false-positive rate. Here, we discuss recent publications in which AI algorithms are utilized to assess chest computer tomography (CT) scans imaging obtaining in the setting of lung cancer screening.

19.
AIMS Microbiol ; 6(3): 176-182, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33134739

RESUMO

Carbapenem-resistant Enterobacteriaceae (CRE) are gram-negative bacteria that are resistant to carbapenems, a group of antibiotics considered as the last-resource for the treatment of infections caused by multidrug-resistant bacteria. CRE constitutes a major threat to health care systems because infections caused by these pathogens are difficult to treat and are commonly associated with high mortality due to the limited availability of effective antibiotics. While infection prevention and timely detection are of vital importance to control CRE infections, developing new and effective anti-CRE therapies is also crucial. Accumulating evidence indicates that gut microbiota alteration (dysbiosis) is associated with an increased intestinal colonization with CRE and consequently with higher risk of developing CRE infections. Importantly, therapeutic interventions aimed to modify the gut microbiota composition via fecal microbiota transplantation (FMT) have been explored in various clinical settings with some of them showing promising results, although larger clinical trials are needed to confirm the efficacy of this strategy. Here, we highlight the challenges associated with the emergence of CRE infections.

20.
Nat Commun ; 11(1): 4147, 2020 08 18.
Artigo em Inglês | MEDLINE | ID: mdl-32811837

RESUMO

Mutated receptor tyrosine kinases (MT-RTKs) such as internal tandem duplication of FMS-like tyrosine kinase 3 (FLT3 ITD) and a point mutation KIT D816V are driver mutations for acute myeloid leukemia (AML). Clathrin assembly lymphoid myeloid leukemia protein (CALM) regulates intracellular transport of RTKs, however, the precise role for MT-RTKs remains elusive. We here show that CALM knock down leads to severely impaired FLT3 ITD- or KIT D814V-dependent cell growth compared to marginal influence on wild-type FLT3- or KIT-mediated cell growth. An antipsychotic drug chlorpromazine (CPZ) suppresses the growth of primary AML samples, and human CD34+CD38- AML cells including AML initiating cells with MT-RTKs in vitro and in vivo. Mechanistically, CPZ reduces CALM protein at post transcriptional level and perturbs the intracellular localization of MT-RTKs, thereby blocking their signaling. Our study presents a therapeutic strategy for AML with MT-RTKs by altering the intracellular localization of MT-RTKs using CPZ.


Assuntos
Antineoplásicos/farmacologia , Proliferação de Células/efeitos dos fármacos , Clorpromazina/farmacologia , Leucemia Mieloide Aguda/genética , Proteínas Monoméricas de Montagem de Clatrina/metabolismo , Proteínas Proto-Oncogênicas c-kit/genética , Tirosina Quinase 3 Semelhante a fms/genética , Tirosina Quinase 3 Semelhante a fms/metabolismo , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Animais , Apoptose/efeitos dos fármacos , Apoptose/genética , Proliferação de Células/genética , Sobrevivência Celular/efeitos dos fármacos , Sobrevivência Celular/genética , Feminino , Células HL-60 , Humanos , Leucemia Mieloide Aguda/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Pessoa de Meia-Idade , Proteínas Monoméricas de Montagem de Clatrina/genética , Mutação Puntual , Transdução de Sinais/efeitos dos fármacos , Sequências de Repetição em Tandem/genética , Transplante Heterólogo , Adulto Jovem
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