Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 461
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Clin Gastroenterol Hepatol ; 22(2): 271-282.e3, 2024 02.
Artigo em Inglês | MEDLINE | ID: mdl-37743040

RESUMO

BACKGROUND & AIMS: Reported rates of delayed bleeding (DB) after endoscopic resection using direct oral anticoagulants (DOACs) are high and heterogeneous. This large-scale multicenter study analyzed cases of DB after colorectal endoscopic submucosal dissection related to various types of DOACs in Japan (the ABCD-J study) with those associated with warfarin. METHODS: We retrospectively reviewed 1019 lesions in patients treated with DOACs and 459 lesions in patients treated with warfarin among 34,455 endoscopic submucosal dissection cases from 47 Japanese institutions between 2012 and 2021. The DB rate (DBR) with each DOAC was compared with that with warfarin. Risk factors for DB in patients treated with DOACs or warfarin were also investigated. RESULTS: The mean tumor sizes in the DOAC and warfarin groups were 29.6 ± 14.0 and 30.3 ± 16.4 mm, respectively. In the DOAC group, the DBR with dabigatran (18.26%) was significantly higher than that with apixaban (10.08%, P = .029), edoxaban (7.73%, P = .001), and rivaroxaban (7.21%, P < .001). Only rivaroxaban showed a significantly lower DBR than warfarin (11.76%, P = .033). In the multivariate analysis, heparin bridging therapy (odds ratio [OR], 2.18; 95% confidence interval [CI], 1.27-3.73, P = .005), rectal location (2.01, 1.28-3.16, P = .002), and procedure time ≥55 minutes (2.43, 1.49-3.95, P < .001) were significant risk factors for DB in the DOAC group. The DB risk in the DOAC group (OR, (95% CI)) was 2.13 (1.30-3.50) and 4.53 (2.52-8.15) for 1 and 2 significant risk factors, respectively. CONCLUSIONS: Dabigatran was associated with a higher DBR than other DOACs, and only rivaroxaban was associated with a significantly lower DBR than warfarin.


Assuntos
Fibrilação Atrial , Neoplasias Colorretais , Ressecção Endoscópica de Mucosa , Humanos , Varfarina , Rivaroxabana/efeitos adversos , Dabigatrana/efeitos adversos , Japão , Ressecção Endoscópica de Mucosa/efeitos adversos , Estudos Retrospectivos , Hemorragia/induzido quimicamente , Anticoagulantes , Neoplasias Colorretais/cirurgia , Neoplasias Colorretais/complicações , Administração Oral , Fibrilação Atrial/complicações
2.
Opt Express ; 32(12): 21389-21399, 2024 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-38859493

RESUMO

We achieved significant enhancements in green light emission (550 nm) from InGaN/GaN quantum wells (QWs) by tuning the localized surface plasmon resonance (LSPR) of self-assembled Ag nanoparticles (NPs) through the application of a SiO2 thin film. The LSPR wavelength of Ag NPs was shifted towards shorter wavelengths by 80 nm using a 5 nm SiO2 layer to separate Ag NPs from GaN surface, thereby aligning it effectively with the green region. This strategic placement of Ag NPs and a 5 nm SiO2 film resulted in significant enhancements of photoluminescence (PL) by 15- and 8.8-fold with 5 and 11 nm GaN cap layers, respectively. The LSPR of Ag NPs on a SiO2 thin film facilitated a longer possible distance for the coupling between surface plasmons (SPs) and excitons in a QW. Traditionally, the distance between SPs-generating metal and a QW has been maintained at 10 nm to achieve substantial enhancements. Remarkably, even with a 25 nm cap layer, Ag NPs on a 5 nm SiO2 film boosted PL by 3.1-fold. The enhancements attributable to Ag NPs on SiO2 films were superior, reaching up to 4.8 times greater than those of Ag NPs on GaN surfaces. Additionally, the PL enhancement factors calculated using the finite differential time domain (FDTD) method aligned closely with experimental results.

3.
Gastric Cancer ; 27(3): 635-640, 2024 05.
Artigo em Inglês | MEDLINE | ID: mdl-38407681

RESUMO

A 44-year-old woman with gastric cancer (GC) and fundic gland polyposis (FGPs) was referred to our hospital for further diagnosis and treatment. She successfully underwent eradication therapy for Helicobacter pylori (HP) 6 years ago, but did not exhibit FGPs at that time. When she underwent an esophagogastroduodenoscopy 2, 4, and 5 years after the eradication of HP, her imaging results revealed the existence of FGPs which gradually increased in her gastric fundus and body. Gastric adenocarcinoma and proximal polyposis of the stomach (GAPPS) was suspected and a mutational analysis was performed, revealing an APC promoter 1B variant c.-191T > C. A robotic total gastrectomy with lymphadenectomy was performed. Histopathological analysis of the surgical specimens revealed GC with no lymph node metastasis. GAPPS is characterized by GC and FGPs. However, our case shows different gastric phenotypes that are dependent on the status of HP infection.


Assuntos
Adenocarcinoma , Pólipos Adenomatosos , Infecções por Helicobacter , Helicobacter pylori , Pólipos , Neoplasias Gástricas , Feminino , Humanos , Adulto , Neoplasias Gástricas/patologia , Adenocarcinoma/genética , Infecções por Helicobacter/complicações
4.
J Gastroenterol Hepatol ; 39(6): 1107-1114, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38419514

RESUMO

BACKGROUND AND AIM: Although erosive esophagitis (EE) is associated with fatty liver and metabolic dysregulation, the association between EE and metabolic dysfunction-associated steatotic liver disease (MASLD) remains unclear. Thus, this study aimed to investigate the longitudinal association between MASLD and EE. METHODS: We included 1578 patients without EE at baseline who underwent more than two health checkups over 2 years. Generalized estimation equations were used to analyze associations between MASLD and EE according to repeated measures at baseline and most recent stages. RESULTS: EE development rates in men and women were 14.5% and 7.2%, respectively. After adjusting for lifestyle habits, the odds ratios of MASLD for EE development in men and women were 1.907 (95% confidence interval [CI]: 1.289-2.832, P < 0.005) and 1.483 (95% CI: 0.783-2.811, P = 0.227), respectively. In the subgroup analysis, after adjusting for lifestyle habits, among men and women aged ≥50 years with more than three MASLD components, the odds ratios for EE development were 2.408 (95% CI: 1.505-3.855, P < 0.001) and 2.148 (95% CI: 1.093-4.221, P < 0.05), respectively. After adjusting for various factors, the significant risk factors for EE development were different between men and women. CONCLUSION: The influence of MASLD and other factors on EE development differed by sex and age. Particularly, patients aged ≥50 years with MASLD and with an increased number of MASLD components should be considered at increased risk for EE.


Assuntos
Esofagite , Fígado Gorduroso , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Estudos Longitudinais , Esofagite/etiologia , Esofagite/epidemiologia , Fígado Gorduroso/etiologia , Fígado Gorduroso/complicações , Fígado Gorduroso/epidemiologia , Adulto , Estilo de Vida , Fatores de Risco , Doenças Metabólicas/epidemiologia , Doenças Metabólicas/etiologia , Doenças Metabólicas/complicações , Fatores Sexuais , Idoso , Fatores Etários
5.
J Gastroenterol Hepatol ; 39(4): 754-761, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38212880

RESUMO

BACKGROUND AND AIM: The influence of metabolic dysfunction-associated fatty liver disease on gallstone development remains unclear. We aimed to investigate the longitudinal association between metabolic dysfunction-associated fatty liver disease and gallstone development in both men and women. METHODS: This observational cohort study included 5398 patients without gallstones who underwent > 2 health check-ups between April 1, 2014, and March 31, 2020. A generalized estimation equation model was used to analyze the association between metabolic dysfunction-associated fatty liver disease and gallstone development according to repeated measures at baseline and most recent stage. RESULTS: After adjustment, the odds ratios of metabolic dysfunction-associated fatty liver disease for gallstone development in men and women were 3.019 (95% confidence interval [CI]: 1.901-4.794) and 2.201 (95% CI: 1.321-3.667), respectively. Among patients aged ≥ 50 years, the odds ratio for gallstone development was significantly enhanced with increasing metabolic dysfunction-associated fatty liver disease component numbers in both sexes; however, no significance was observed in those aged < 50 years. Other significant risk factors for gallstone development were age (odds ratio: 1.093, 95% CI: 1.060-1.126) and waist circumference (odds ratio: 1.048, 95% CI: 1.018-1.079) in men and age (odds ratio: 1.035, 95% CI: 1.003-1.067) and current smoking (odd ratio: 5.465, 95% CI: 1.881-15.88) in women. CONCLUSION: Although the risk factors for gallstone development differed between sexes, metabolic dysfunction-associated fatty liver disease was common. Paying attention to an increase in the number of metabolic dysfunction-associated fatty liver disease components in patients aged ≥ 50 years is important for gallstone prevention.


Assuntos
Cálculos Biliares , Hepatopatia Gordurosa não Alcoólica , Feminino , Humanos , Masculino , Estudos de Coortes , Cálculos Biliares/complicações , Cálculos Biliares/epidemiologia , Estudos Longitudinais , Hepatopatia Gordurosa não Alcoólica/complicações , Hepatopatia Gordurosa não Alcoólica/epidemiologia , Fatores de Risco , Pessoa de Meia-Idade
6.
Gan To Kagaku Ryoho ; 51(2): 196-198, 2024 Feb.
Artigo em Japonês | MEDLINE | ID: mdl-38449411

RESUMO

Radical cystectomy for locally advanced colorectal cancer with urinary bladder invasion significantly reduces the quality of life in exchange for a cure. We performed preoperative chemotherapy with FOLFOXIRI plus bevacizumab for 3 patients with locally advanced colorectal cancer with urinary bladder invasion to avoid radical cystectomy and to achieve local control for urinary bladder preservation. Grade 3 neutropenia was observed in 2 patients as an adverse reaction to the preoperative chemotherapy, but all 3 patients showed good tumor regression. All 3 patients underwent laparoscopic high anterior rectal resection and partial cystectomy, and all were able to undergo R0 resections with urinary bladder preservation. One patient had anastomotic leakage as a postoperative complication. One patient had local recurrence in the urinary bladder, and 2 had recurrence with peritoneal dissemination during their postoperative courses. Preoperative chemotherapy(FOLFOXIRI plus bevacizumab)for locally advanced colorectal cancer with urinary bladder invasion is considered to be a useful treatment option because of its potential for tumor shrinkage and bladder preservation.


Assuntos
Neoplasias Colorretais , Segunda Neoplasia Primária , Neutropenia , Humanos , Bexiga Urinária , Bevacizumab , Qualidade de Vida , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/cirurgia
7.
Ann Surg Oncol ; 30(5): 3125-3136, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36042102

RESUMO

BACKGROUND: The lipid scavenger receptor cluster of differentiation 36 (CD36) has been shown to have a pro-metastatic function in several cancers. Adipose tissue, a favorable site for peritoneal metastasis (PM) from gastric cancer (GC), promotes this process by providing free fatty acids (FFAs); however, the role of CD36 in PM progression from GC remains to be elucidated. MATERIALS AND METHODS: We evaluated CD36 expression in the GC cells under various conditions. CD36 overexpressing (CD36OE) MKN45 cells were prepared and their migration and invasive properties were assessed. A PM mouse model was used to investigate the biological effects of palmitic acid (PA) and CD36. Furthermore, we examined the clinical role of CD36 expression in 82 human PM samples by immunohistochemical staining. RESULTS: Hypoxia markedly increased CD36 expression in GC cells. In normoxia, only CD36OE MKN45 cells treated with PA showed an increase in migration and invasion abilities. An increased expression of active Rac1 and Cdc42 was observed, which decreased following etomoxir treatment. Conversely, hypoxia increased those capacities of both vector and CD36OE MKN45 cells. In a mouse model transplanted with CD36OE MKN45 cells, more peritoneal tumors were observed in the high-fat diet group than those in the normal diet group. In clinical samples, 80% of PM lesions expressed CD36, consistent with hypoxic regions, indicating a significant association with prognosis. CONCLUSION: Our findings indicate that a hypoxia in the peritoneal cavity induces CD36 expression in GC cells, which contributes to PM through the uptake of FFAs.


Assuntos
Antígenos CD36 , Hipóxia , Neoplasias Peritoneais , Neoplasias Gástricas , Neoplasias Gástricas/patologia , Neoplasias Peritoneais/patologia , Metástase Neoplásica , Antígenos CD36/metabolismo , Humanos , Masculino , Ácidos Graxos/metabolismo , Ácido Palmítico
8.
BMC Gastroenterol ; 23(1): 286, 2023 Aug 18.
Artigo em Inglês | MEDLINE | ID: mdl-37596515

RESUMO

BACKGROUND: Malignant esophageal stenosis is a common and severe complication of advanced esophageal cancer that can be a serious problem in the continuation of chemotherapy and other anticancer treatments. The impact of chemotherapy regimens on the degree of improvement in esophageal stenosis is unknown. In this study, we focused on the impacts of chemotherapy on the direct anticancer effects, and in the improvement of malignant stenosis. METHODS: Patients who underwent radical esophagectomy after chemotherapy, either adjuvant 5-fluorouracil and cisplatin (FP) or docetaxel, cisplatin, and 5-fluorouracil (DCF) regimen, were included. We assessed the length of the cancerous stenosis, the width of the narrowest segment, and the size of the intraluminal area in the stenotic segment by fluoroscopy, and compared the differences before and after chemotherapy. In addition, we evaluated the dysphagia score (Mellow-Pinkas scoring system) as the evaluation of patients' symptoms. The antitumor effects of chemotherapy were also investigated. RESULTS: A total of 81 patients were enrolled: 50 were treated with FP, and 31 were treated with DCF. The expansion rate in the length of the narrowest part was significantly increased in the DCF group compared with the FP group. Furthermore, the stenosis index (intraluminal stenotic area/stenotic length) was significantly increased in the DCF group compared with the FP group (112% vs 96%, P = 0.038). Dysphagia score after chemotherapy significantly improved in the DCF group compared to the FP group (P = 0.007). The response rates were 60% in the FP group and 67.7% in the DCF group. Effective histopathological response (improvement to grade 2 or 3) was 24% in the FP group and 38.8% in the DCF group. CONCLUSION: DCF therapy is more effective than FP treatment in the improvement of malignant esophageal stenosis.


Assuntos
Transtornos de Deglutição , Estenose Esofágica , Humanos , Estenose Esofágica/etiologia , Cisplatino/uso terapêutico , Docetaxel/uso terapêutico , Constrição Patológica/etiologia , Transtornos de Deglutição/etiologia , Fluoruracila/uso terapêutico
9.
BMC Surg ; 23(1): 242, 2023 Aug 18.
Artigo em Inglês | MEDLINE | ID: mdl-37596560

RESUMO

BACKGROUND: The degree of difficulty in the overall procedure and forceps handling encountered by surgeons is greatly influenced by the positional relationship of intrathoracic organs in minimally invasive esophagectomy. This study aimed to identify the anatomical factors associated with the difficulty of minimally invasive esophagectomy assessed by intraoperative injuries and postoperative outcomes. METHODS: Minimally invasive esophagectomy in the left-decubitus position was performed in 258 patients. We defined α (mm) as the anteroposterior distance between the front of the vertebral body and aorta, ß (mm) as the distance between the center of the vertebral body and center of the aorta, and γ (degree) as the angle formed at surgeon's right-hand port site by insertion of lines from the front of aorta and from the front of vertebrae in the computed tomography slice at the operator's right-hand forceps hole level. We retrospectively analyzed the correlations among clinico-anatomical factors, surgeon- or assistant-caused intraoperative organ injuries, and postoperative complications. RESULTS: Intraoperative injuries significantly correlated with shorter α (0.2 vs. 3.9), longer ß (33.0 vs. 30.5), smaller γ (3.0 vs. 4.3), R1 resection (18.5% vs. 8.3%), and the presence of intrathoracic adhesion (46% vs. 26%) compared with the non-injured group. Division of the median values into two groups showed that shorter α and smaller γ were significantly associated with organ injury. Longer ß was significantly associated with postoperative tachycardia onset, respiratory complications, and mediastinal recurrence. Furthermore, the occurrence of intraoperative injuries was significantly associated with the onset of postoperative pulmonary complications. CONCLUSIONS: Intrathoracic anatomical features greatly affected the procedural difficulty of minimally invasive esophagectomy, suggesting that preoperative computed tomography simulation and appropriate port settings may improve surgical outcomes.


Assuntos
Neoplasias Esofágicas , Cirurgiões , Humanos , Estudos Retrospectivos , Complicações Pós-Operatórias/epidemiologia , Aorta , Neoplasias Esofágicas/cirurgia
10.
Esophagus ; 20(3): 474-483, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-36917327

RESUMO

AIM: This study aimed to examine the prognostic value of desmoplastic reaction (DR) in esophageal squamous cell carcinoma (ESCC), particularly in patients who received neoadjuvant therapy, such as chemotherapy (NAC) or chemoradiotherapy (NACRT). METHOD: In total, 153 patients with pStage II/III ESCC were included in this study. Ninety-one patients received neoadjuvant therapy (NAC, 70; NACRT, 21). Patients were classified according to three DR categories based on the presence of keloid-like collagen and/or myxoid stroma. RESULTS: In total, 50, 50, and 53 patients were classified as having mature, intermediate, and immature DR, respectively. The weighted kappa coefficient was 0.623 in the patients with preoperative treatments and 0.782, in those without. The 5-year disease-specific survival (DSS) rates in patients with intermediate/immature DR was significantly worse than those with mature DR (40.7% vs. 73.3%, p < 0.001). Similarly, the 5-year DSS rate in patients with intermediate/immature DR was significantly worse than those with mature DR in a study of patients who received neoadjuvant therapy (46.7% vs. 71.2%, p = 0.009). Multivariate analysis revealed that DR (hazard ratio [HR]: 3.15, 95% confidence interval [CI] 1.58-6.27, p = 0.001), along with N factors, was an independent risk factor for DSS. Moreover, multivariate analysis of patients who received neoadjuvant therapy revealed only DR (HR: 2.47, 95% CI 1.02-5.96, p = 0.045) as independent risk factors for DSS. CONCLUSION: The DR classification was a valuable prognostic factor not only in the ESCC patients without neoadjuvant therapy but also in those with neoadjuvant therapy.


Assuntos
Neoplasias Esofágicas , Carcinoma de Células Escamosas do Esôfago , Humanos , Prognóstico , Terapia Neoadjuvante , Neoplasias Esofágicas/tratamento farmacológico , Neoplasias Esofágicas/patologia , Quimiorradioterapia
11.
Int J Cancer ; 150(10): 1706-1721, 2022 05 15.
Artigo em Inglês | MEDLINE | ID: mdl-35080810

RESUMO

The tumor microenvironment plays a key role in cancer aggressiveness. Desmoplastic reaction (DR), morphologically classified as Mature, Intermediate and Immature types, has previously been shown to be highly prognostic in colorectal cancer (CRC) and it consists to a large extent of cancer-associated fibroblasts (CAFs). The aim of our study was to characterize the molecular background of DR and understand the effects of CAFs in tumor aggressiveness. The prognostic significance of DR was initially examined in 1497 patients. Then CAFs originating from patient tissues with different DR types were isolated and their impact on tumor growth was examined both in vitro and in vivo. DR was shown to be highly prognostic, with patients within the Immature DR group conferring the worst relapse-free survival. The conditioned media of CAFs from tumor with Immature-type DR (CAFsImmature ) significantly increased proliferation and migration of CRC cell lines and growth of CRC-derived organoids compared to that of CAFs from Mature-type DR (CAFsMature ). Subcutaneous or orthotopic implantation of CRC cells together with CAFsImmature in mice significantly promoted tumor growth and dissemination compared to implantation with CAFsMature . Systematic examination of the expression of "a disintegrin and metalloproteinases" (ADAMs) in CAFs isolated from CRC tissues showed that the secreted isoform of ADAM9 (ADAM9s) was significantly higher in CAFsImmature than in CAFsMature . Knockdown of ADAM9s in CAFsImmature abrogated the promoting effects on CRC cell proliferation and migration. CAFs-derived ADAM9s is implicated in deteriorating survival in CRC patients with Immature-type DR by increasing tumor cell proliferation and dissemination.


Assuntos
Fibroblastos Associados a Câncer , Neoplasias Colorretais , Proteínas ADAM , Animais , Fibroblastos Associados a Câncer/metabolismo , Neoplasias Colorretais/metabolismo , Fibroblastos/patologia , Humanos , Proteínas de Membrana/genética , Proteínas de Membrana/metabolismo , Camundongos , Recidiva Local de Neoplasia/patologia , Prognóstico , Microambiente Tumoral
12.
Cancer Sci ; 113(12): 4374-4384, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36082704

RESUMO

Although many chemopreventive studies on colorectal tumors have been reported, no effective and safe preventive agent is currently available. We searched for candidate preventive compounds against colorectal tumor comprehensively from United States Food and Drug Administration (FDA)-approved compounds by using connectivity map (CMAP) analysis coupled with in vitro screening with colorectal adenoma (CRA) patient-derived organoids (PDOs). We generated CRA-specific gene signatures based on the DNA microarray analysis of CRA and normal epithelial specimens, applied them to CMAP analysis with 1309 FDA-approved compounds, and identified 121 candidate compounds that should cancel the gene signatures. We narrowed them down to 15 compounds, and evaluated their inhibitory effects on the growth of CRA-PDOs in vitro. We finally identified resveratrol, one of the polyphenolic phytochemicals, as a compound showing the strongest inhibitory effect on the growth of CRA-PDOs compared with normal epithelial PDOs. When resveratrol was administered to ApcMin/+ mice at 15 or 30 mg/kg, the number of polyps (adenomas) was significantly reduced in both groups compared with control mice. Similarly, the number of polyps (adenomas) was significantly reduced in azoxymethane-injected rats treated with 10 or 100 mg/resveratrol compared with control rats. Microarray analysis of adenomas from resveratrol-treated rats revealed the highest change (downregulation) in expression of LEF1, a key molecule in the Wnt signaling pathway. Treatment with resveratrol significantly downregulated the Wnt-target gene (MYC) in CRA-PDOs. Our data demonstrated that resveratrol can be the most effective compound for chemoprevention of colorectal tumors, the efficacy of which is mediated through suppression of LEF1 expression in the Wnt signaling pathway.


Assuntos
Adenoma , Neoplasias Colorretais , Camundongos , Ratos , Animais , Resveratrol/farmacologia , Resveratrol/uso terapêutico , Adenoma/tratamento farmacológico , Adenoma/genética , Adenoma/prevenção & controle , Neoplasias Colorretais/tratamento farmacológico , Neoplasias Colorretais/genética , Neoplasias Colorretais/prevenção & controle , Via de Sinalização Wnt , Quimioprevenção , Fator 1 de Ligação ao Facilitador Linfoide
13.
Cancer Sci ; 113(12): 4244-4257, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36073574

RESUMO

Although right-sided colorectal cancer (CRC) shows a worse prognosis than left-sided CRC, the underlying mechanism remains unclear. We established patient-derived organoids (PDOs) from left- and right-sided CRCs and directly compared cell proliferation and invasion capability between them. We then analyzed the expression of numerous genes in signal transduction pathways to clarify the mechanism of the differential prognosis. Cell proliferation activity and invasion capability in right-sided cancer PDOs were significantly higher than in left-sided cancer PDOs and normal PDOs, as revealed by Cell Titer Glo and transwell assays, respectively. We then used quantitative RT-PCR to compare 184 genes in 30 pathways among right-sided and left-sided cancer and normal PDOs and found that the TIMP1 mRNA level was highest in right-sided PDOs. TIMP1 protein levels were upregulated in right-sided PDOs compared with normal PDOs but was downregulated in left-sided PDOs. TIMP1 knockdown with shRNA significantly decreased cell proliferation activity and invasion capability in right-sided PDOs but not in left-sided PDOs. Moreover, TIMP1 knockdown significantly decreased pFAK and pAkt expression levels in right-sided PDOs but not in left-sided PDOs. A database analysis of The Cancer Genome Atlas revealed that TIMP1 expression in right-sided CRCs was significantly higher than in left-sided CRCs. Kaplan-Meier survival analysis showed significantly shorter overall survival in high-TIMP1 patients versus low-TIMP1 patients with right-sided CRCs but not left-sided CRCs. Our data suggest that TIMP1 is overexpressed in right-sided CRCs and promotes cell proliferation and invasion capability through the TIMP1/FAK/Akt pathway, leading to a poor prognosis. The TIMP1/FAK/Akt pathway can be a target for therapeutic agents in right-sided CRCs.


Assuntos
Neoplasias do Colo , Neoplasias Colorretais , Humanos , Prognóstico , Transdução de Sinais , Neoplasias Colorretais/genética , Neoplasias do Colo/metabolismo , Proliferação de Células/genética , Inibidor Tecidual de Metaloproteinase-1/genética , Inibidor Tecidual de Metaloproteinase-1/metabolismo
14.
BMC Cancer ; 22(1): 608, 2022 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-35658848

RESUMO

BACKGROUND: The multidisciplinary treatment including induction chemotherapy plus conversion surgery (CS) has attracted attention as a new strategy to improve the outcome of metastatic gastric cancer (MGC). However, it is unclear which patients achieve a good response to chemotherapy and successful CS. Tumor-infiltrating immune cells (TIICs) have been reported to be both prognostic and predictive biomarkers not only in immunotherapy but also in chemotherapy in many cancer types. However, there have been no reports on the usefulness of TIICs as biomarkers in conversion surgery for MGC. The aim of the present study was to evaluate the association between the TIICs and treatment outcome for the multidisciplinary treatment in MGC. METHODS: We retrospectively analyzed 68 MGC patients who received docetaxel plus cisplatin plus S-1 (DCS) therapy between April 2006 and March 2019 in our institute. The number of tumor-infiltrating CD4+, CD8+, Foxp3+lymphocytes, CD68+, CD163+macrophages in pre-treatment endoscopic biopsy samples were evaluated to investigate their predictive value for multidisciplinary treatment. RESULTS: Fifty patients underwent CS following DCS therapy (CS group), whereas 18 patients underwent DCS therapy alone (non-CS group). The median survival time (MST) of CS group was 33.3 months, which was significantly longer than the MST of 9.0 months in non-CS group (p < 0.01). The number of CD163+macrophages was extracted as an independent prognostic factor for overall survival in all patients. There were more cases of high infiltration of CD163+macrophages in non-CS group than in CS group. Furthermore, in CS group, pathological responders to DCS therapy showed low infiltration of CD163+ macrophages, and high infiltration of CD8+lymphocyte. CD163 low group showed a significant prolonged survival compared with CD163 high group in patients who underwent CS (p = 0.02). CONCLUSIONS: The pre-treatment CD163+macrophages infiltration would be a pivotal biomarker for predicting prognosis and pathological response to multidisciplinary treatment among TIICs in MGC. Thus, for patients with low CD163+macrophage infiltration in pre-treatment biopsy sample, diagnostic imaging should be performed frequently during chemotherapy to avoid missing the optimal timing for CS, and CS should be aggressively considered as a treatment option if curative resection is deemed feasible.


Assuntos
Neoplasias Gástricas , Antígenos CD , Antígenos de Diferenciação Mielomonocítica , Humanos , Linfócitos do Interstício Tumoral , Macrófagos , Prognóstico , Receptores de Superfície Celular , Estudos Retrospectivos , Neoplasias Gástricas/patologia
15.
J Gastroenterol Hepatol ; 37(5): 919-927, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35332577

RESUMO

BACKGROUND AND AIM: Although rectal neuroendocrine tumor (NET-G1) have potential metastatic capability, even among small tumors, no predictive biomarker for invasion and metastasis has been reported. We analyzed microRNA (miRNA) expression profiles in rectal NET-G1 tissues with and without lymphovascular invasion (LVI). Moreover, we then investigated their target genes to clarify the mechanism of invasion/metastasis in NET-G1. METHODS: miRNA array analysis was performed using seven rectal NET-G1 tissues with LVI and seven without LVI. miRNA expression was confirmed by quantitative real-time PCR. A NET cell line H727 was transfected with miRNA mimic or target gene small interfering RNA, and migration and invasion assays were performed. RESULTS: The expression levels of miR-144-3p and miR-451a were significantly higher in NET-G1 with LVI versus without LVI, as determined by miRNA array analysis and RT-qPCR. A significant correlation was observed between miR-144-3p and miR-451a expression levels, strongly suggesting miR144/451 cluster overexpression in NET-G1 with LVI. Bioinformatic analysis of target genes revealed that miR-144-3p and miR-451a directly interact with PTEN and p19 mRNA, respectively. Immunohistochemistry revealed significantly lower expression of PTEN and p19 in NET-G1 tissues with LVI than in those without LVI. The miR-144-3p and miR-451a mimic significantly increased cell migration/invasion capability, respectively. Knockdown of PTEN and p19 induced significant augmentation of cell invasion and migration capability, respectively. CONCLUSIONS: Our data suggest that overexpression of miR-144/miR-451 cluster promotes LVI via repression of PTEN and p19 in rectal NET-G1 cells. miR-144/451 cluster may be a novel biomarker for predicting invasion/metastasis in rectal NET-G1.


Assuntos
MicroRNAs , Tumores Neuroendócrinos , Neoplasias Retais , Biomarcadores , Linhagem Celular Tumoral , Movimento Celular/genética , Proliferação de Células/genética , Regulação Neoplásica da Expressão Gênica/genética , Humanos , MicroRNAs/genética , MicroRNAs/metabolismo , Tumores Neuroendócrinos/genética , PTEN Fosfo-Hidrolase/genética , PTEN Fosfo-Hidrolase/metabolismo , Neoplasias Retais/genética
16.
Int J Clin Oncol ; 27(4): 756-764, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35091826

RESUMO

BACKGROUND: In colorectal cancer, tumor budding is highlighted as both a prognostic indicator and a predictor of chemosensitivity. However, tumor budding has a serious drawback because of unattainable preoperative assessment, thereby, making it not applicable to decision-making on treatment strategies. Recently, high expressions of seven genes (i.e., MSLN, SLC4A11, WNT11, SCEL, RUNX2, MGAT3, and FOXC1) were shown to be associated with high-budding colorectal cancers. This study aimed to propose a budding prediction system using selected RNAs extracted from biopsy specimens. METHODS: The RNA expression levels in 86 surgically resected samples and in 104 samples obtained by colonoscopy before surgery were investigated. RESULTS: The tumor surface expressions of four exclusive genes (i.e., MSLN, SLC4A11, SCEL, and MGAT3) were correlated with the tumor budding grade. Subsequently, the logit P value calculated by multiple logistic regression analysis using the four surface gene expressions was set as the following budding predictive score: Logit (P) = - 0.55 + 0.27*MSLN + 0.16*SLC4A11 + 0.06*MGAT3 + 0.21*SCEL. The effectiveness of the model using colorectal cancer biopsy samples was well corroborated prospectively. CONCLUSION: The budding predictive score that we developed using endoscopic biopsy specimens was clarified to have a high potential for preoperative use.


Assuntos
Neoplasias Colorretais , Biópsia , Neoplasias Colorretais/diagnóstico , Neoplasias Colorretais/patologia , Humanos , Metástase Linfática , Estadiamento de Neoplasias , Prognóstico
17.
Int J Clin Oncol ; 27(4): 639-647, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35106660

RESUMO

BACKGROUND: Cowden syndrome (CS) is an autosomal-dominant hereditary disorder caused by a germline PTEN variant and characterized by multiple hamartomas and a high risk of cancers. However, no detailed data on CS in Asian patients nor genotype-phenotype correlation have been reported. METHODS: We performed the first Japanese nationwide questionnaire survey on CS and obtained questionnaire response data on 49 CS patients. RESULTS: Patients included 26 females (median age 48 years). The incidence of breast, thyroid, endometrium, and colorectal cancer was 32.7%, 12.2%, 19.2% (among females), and 6.1%, respectively. The incidence of any cancers was relatively high among all patients (46.9%, 23/49), and particularly female patients (73.1%, 19/26), compared with previous reports from Western countries. Gastrointestinal (GI) polyps were more frequently found throughout the GI tract compared with previous studies. PTEN variants were detected in 95.6% (22/23) of patients; 12 in the N-terminal region (11 in phosphatase domain) and 10 in the C-terminal (C2 domain) region. The incidence of cancer in the C2 domain group was significantly higher than in the N-terminal region (phosphatase) group. All female patients with C2 domain variant had breast cancer. CONCLUSION: Our data suggest that Japanese patients with CS, particularly female patients and patients with C2 domain variant may have a high risk of cancers.


Assuntos
Neoplasias da Mama , Síndrome do Hamartoma Múltiplo , Neoplasias da Mama/genética , Feminino , Estudos de Associação Genética , Síndrome do Hamartoma Múltiplo/complicações , Síndrome do Hamartoma Múltiplo/epidemiologia , Síndrome do Hamartoma Múltiplo/genética , Humanos , Pólipos Intestinais/epidemiologia , Japão/epidemiologia , Masculino , Pessoa de Meia-Idade , PTEN Fosfo-Hidrolase/genética , Risco
18.
Neuropathology ; 42(1): 40-44, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-35001426

RESUMO

An 80-year-old man with dementia demonstrated cerebellar hemorrhage. Autopsy revealed pathology compatible with Alzheimer's disease and cerebral amyloid angiopathy (CAA). CAA was more prevalent in the occipital lobe than in the frontal, parietal, and temporal lobes; however, amyloid-ß (Aß)-containing senile plaques were less abundant in the occipital cortex than in the other cortices. In the cerebellum, abundant CAA-involved vessels were observed in the subarachnoid space and molecular layer and to a lesser extent in the Purkinje and granule layers. On consecutive sections, Aß1-42 immunohistochemistry revealed senile plaques and CAA-involved vessels with strong immunoreactivity whereas Aß1-40 immunohistochemistry identfied CAA-involved vessels with strong immunoreactivity and senile plaques with weak immunoreactivity in the cerebellar cortices.


Assuntos
Doença de Alzheimer , Angiopatia Amiloide Cerebral , Idoso de 80 Anos ou mais , Peptídeos beta-Amiloides , Autopsia , Angiopatia Amiloide Cerebral/complicações , Hemorragia Cerebral/complicações , Humanos , Masculino , Placa Amiloide
19.
Neuropathology ; 42(6): 483-487, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35747901

RESUMO

We semiquantitatively compared the frequency and severity of cerebral amyloid angiopathy (CAA) in the cerebellum and CAA-positive occipital lobe of 60 subjects from routine autopsies. In the 60 subjects with a CAA-positive occipital lobe, cerebellar CAA was observed in 29 subjects (48.3%), and the severity of cerebellar CAA was relatively mild compared with occipital lobe CAA. Capillary CAA was observed in the occipital lobe of 12 subjects and the cerebellum of three subjects. CAA-related vasculopathies were observed in the occipital lobe of 15 subjects and the cerebellum of two subjects. The severity of CAA-related vasculopathy was mild in both of these subjects. Amyloid-ß plaques were observed in the occipital lobe of 54 subjects (90%) and the cerebellum of 16 subjects (26.7%). The severity of amyloid-ß plaques in the cerebellum was mild compared with the occipital lobe. In summary, we confirmed that cerebellar CAA is frequently observed in the cerebellum but with a lower severity than CAA in the occipital lobe.


Assuntos
Doença de Alzheimer , Angiopatia Amiloide Cerebral , Humanos , Doença de Alzheimer/patologia , Angiopatia Amiloide Cerebral/patologia , Peptídeos beta-Amiloides/metabolismo , Placa Amiloide/patologia , Encéfalo/patologia , Lobo Occipital/patologia
20.
Nihon Shokakibyo Gakkai Zasshi ; 119(10): 937-945, 2022.
Artigo em Japonês | MEDLINE | ID: mdl-36216544

RESUMO

Intratumoral HER2 heterogeneity is a well-described gastric cancer feature and may explain many false-negative results related to this oncogene. An 81-year-old man was diagnosed at our hospital with stage IV gastric cancer with multiple lymph node metastases. Immunohistochemistry (IHC) analysis indicated that the primary tumor was HER2-negative. After a chemotherapy course, we submitted a pretreatment biopsy specimen for comprehensive cancer genome profiling (CGP) to determine the last-line therapy. This revealed HER2 amplification. The specimen was reevaluated using fluorescence in situ hybridization and IHC with deeper-cut specimens, which confirmed that the tumor was indeed HER2-positive. Therefore, the patient was treated with chemotherapy plus trastuzumab, which elicited tumor shrinkage and conferred long-term survival. Our current data underscore the CGP importance, which can provide more accurate tumor profilings and inform subsequent treatment decisions.


Assuntos
Neoplasias Gástricas , Idoso de 80 Anos ou mais , Biomarcadores Tumorais , Humanos , Hibridização in Situ Fluorescente , Masculino , Receptor ErbB-2/genética , Receptor ErbB-2/uso terapêutico , Neoplasias Gástricas/tratamento farmacológico , Neoplasias Gástricas/genética , Neoplasias Gástricas/patologia , Trastuzumab/uso terapêutico
SELEÇÃO DE REFERÊNCIAS
Detalhe da pesquisa