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1.
World Neurosurg ; 184: e659-e673, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38342172

RESUMO

BACKGROUND: Giant pituitary adenomas (GPAs) are defined as tumors with ≥40 mm in any maximum diameter, and these tend to invade multiple intracranial compartments. Hence, treatment remains a surgical challenge. OBJECTIVE: To describe the clinical and surgical outcomes of the endoscopic endonasal approach (EEA) for GPA in a pituitary referral center in Latin America and to analyze associated predictive factors. METHODS: 37 patients with histologically-confirmed GPA treated solely through the EEA between a 2-year period were included. Preoperative and postoperative clinical and neuroimaging findings; surgical morbidity and mortality; and binary logistic regression analysis to assess predictive factors were analyzed. RESULTS: Preoperative visual impairment prevalence was 97.3%. Mean tumor volume was 32 cc and gross total resection rate was 40.5%. Favorable visual acuity and visual fields outcome rate was 75% and 82.9%, respectively. In the multivariate analysis, bilateral cavernous sinus invasion (P = 0.018) and postoperative cerebrospinal fluid (CSF) leak (P = 0.036) were associated with an unfavorable visual acuity outcome, while radiation therapy (P = 0.035) was for visual fields. Similarly, intraoperative CSF leak was a predictive factor for postoperative CSF leak (10.8%) (P = 0.042) and vascular injury (13.5%) (P = 0.048). CONCLUSIONS: In this first Mexican clinical series, we demonstrated that the EEA is a safe and effective technique for GPA, although early diagnosis and prompt intervention may promote further visual function preservation without significant endocrine morbidity.


Assuntos
Adenoma , Doenças da Hipófise , Neoplasias Hipofisárias , Humanos , Neoplasias Hipofisárias/diagnóstico por imagem , Neoplasias Hipofisárias/cirurgia , Neoplasias Hipofisárias/complicações , Adenoma/diagnóstico por imagem , Adenoma/cirurgia , Adenoma/complicações , Nariz/cirurgia , Complicações Pós-Operatórias/epidemiologia , Resultado do Tratamento , Estudos Retrospectivos
2.
J Dent Res ; 102(10): 1152-1161, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37448347

RESUMO

Epidemiological studies suggest that the severity of periodontitis is higher in people with diabetes than in healthy individuals. Insulin resistance might play a crucial role in the pathogenesis of multiple diabetic complications and is reportedly induced in the gingiva of rodents with type 2 diabetes; however, the molecular mechanisms underlying the pathogenesis of diabetes-related periodontitis remain unclear. Therefore, we aimed to investigate whether endothelial insulin resistance in the gingiva may contribute to the pathogenesis of periodontitis as well as elucidate its underlying molecular mechanisms. We demonstrated that insulin treatment downregulated lipopolysaccharide (LPS)-induced or tumor necrosis factor α (TNFα)-induced VCAM1 expression in endothelial cells (ECs) via the PI3K/Akt activating pathway, resulting in reduced cellular adhesion between ECs and leukocytes. Hyperglycemia-induced selective insulin resistance in ECs diminished the effect of insulin on LPS- or TNFα-stimulated VCAM1 expression. Vascular endothelial cell-specific insulin receptor knockout (VEIRKO) mice exhibited selective inhibition of the PI3K/Akt pathway in the gingiva and advanced experimental periodontitis-induced alveolar bone loss via upregulation of Vcam1, Tnfα, Mcp-1, Rankl, and neutrophil migration into the gingiva compared with that in the wild-type (WT) mice despite being free from diabetes. We also observed that insulin-mediated activation of FoxO1, a downstream target of Akt, was suppressed in the gingiva of VEIRKO and high-fat diet (HFD)-fed mice, hyperglycemia-treated ECs, and primary ECs from VEIRKO. Further analysis using ECs transfected with intact and mutated FoxO1, with mutations at 3 insulin-mediated phosphorylation sites (T24A, S256D, S316A), suggested that insulin-mediated regulation of VCAM1 expression and cellular adhesion of ECs with leukocytes was attenuated by mutated FoxO1 overexpression. These results suggest that insulin resistance in ECs may contribute to the progression of periodontitis via dysregulated VCAM1 expression and cellular adhesion with leukocytes, resulting from reduced activation of the PI3K/Akt/FoxO1 axis.


Assuntos
Diabetes Mellitus Tipo 2 , Hiperglicemia , Resistência à Insulina , Periodontite , Animais , Camundongos , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/metabolismo , Células Endoteliais , Hiperglicemia/complicações , Insulina/metabolismo , Resistência à Insulina/fisiologia , Lipopolissacarídeos/farmacologia , Periodontite/complicações , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Fator de Necrose Tumoral alfa/farmacologia , Fator de Necrose Tumoral alfa/metabolismo
3.
Skin Health Dis ; 1(3): e37, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35663139

RESUMO

Background: Deficiency of DNA mismatch repair (MMR) induces microsatellite instability (MSI). Pembrolizumab, an antibody targeting PD-1 (an immune checkpoint inhibitor), is more effective against MMR-deficient tumours than against MMR-proficient tumours. The status of MMR is a useful biomarker for predicting the effectiveness of pembrolizumab administration. Although the status of MMR has attracted attention in skin tumours, there are few reports on MSI in extramammary Paget's disease (EMPD). Objectives: To evaluate the status of MMR in patients with EMPD. Materials & Methods: One hundred one patients with EMPD were included. MMR status of the genomic DNA of each subject was analysed using Promega panel (approved as a companion diagnostic agent for the administration of pembrolizumab). Results: MSI testing showed the occurrence rates of MSI-high (more than two markers are unstable), MSI-low (one marker is unstable) and MSS (all markers are stable) tumour tissues were 0% (0/101), 1.0% (1/101) and 99.0% (100/101), respectively. Conclusion: The status of MMR may not be useful for the potential therapeutic application of pembrolizumab.

4.
Ann R Coll Surg Engl ; 102(8): e198-e201, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32538111

RESUMO

Colorectal cancer metastasis to the retroperitoneum, especially solitary metastasis allowing curative resection, is rare. We report a case of complete resection of retroperitoneal metachronous solitary metastasis from caecal cancer without distant metastasis. An 80-year-old woman with caecal cancer underwent laparoscopic ileocaecal resection with regional lymph node dissection. According to the eighth edition of the TNM classification, the pathological diagnosis was stage IIA (T3N0M0). Six months following the surgery, computed tomography revealed a solitary mass of 2cm diameter, dorsal to the right kidney. A second procedure for the removal of the tumour was performed. The lesion was pathologically diagnosed as a metachronous solitary retroperitoneal metastasis from caecal cancer. The patient is surviving and free from recurrence 17 months following the second procedure.


Assuntos
Neoplasias do Ceco/patologia , Ceco , Íleo , Neoplasias Retroperitoneais , Idoso de 80 Anos ou mais , Ceco/diagnóstico por imagem , Ceco/patologia , Ceco/cirurgia , Feminino , Humanos , Íleo/diagnóstico por imagem , Íleo/patologia , Íleo/cirurgia , Laparoscopia , Neoplasias Retroperitoneais/diagnóstico , Neoplasias Retroperitoneais/patologia , Neoplasias Retroperitoneais/secundário , Neoplasias Retroperitoneais/cirurgia
5.
Drugs Today (Barc) ; 55(4): 231-236, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31050691

RESUMO

Dacomitinib (PF-00299804, Vizimpro) was developed as a second-generation, oral, irreversible inhibitor of human epidermal growth factor receptor (EGFR)- 1, -2 and -4 tyrosine kinase. On September 27, 2018, the United States Food and Drug Administration (FDA) approved dacomitinib for the first-line treatment of patients with metastatic non-small cell lung cancer (NSCLC) with EGFR exon 19 deletion or exon 21 L858R substitution mutations. On January 8, 2019, the Ministry of Health, Labour and Welfare of Japan approved this second-generation EGFR tyrosine kinase inhibitor (TKI) for the treatment of EGFR mutation-positive inoperable or recurrent NSCLC. The European Commission also approved dacomitinib on April 3, 2019, as monotherapy for the first-line treatment of adult patients with locally advanced or metastatic NSCLC with EGFR activating mutations. Approval of dacomitinib was based on a randomized, multicenter, open-label, active-controlled trial (ARCHER 1050; ClinicalTrials.gov Identifier NCT01774721) which demonstrated the safety and efficacy of dacomitinib compared to gefitinib in 452 patients with unresectable and metastatic NSCLC. Dacomitinib represents a powerful new treatment option compared with first-generation EGFR-TKIs. In this paper, we review the clinical and preclinical studies of dacomitinib and discuss the drug's clinical value.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Inibidores de Proteínas Quinases/uso terapêutico , Quinazolinonas/uso terapêutico , Receptores ErbB/antagonistas & inibidores , Receptores ErbB/genética , Humanos , Mutação , Recidiva Local de Neoplasia , Proteínas Tirosina Quinases/antagonistas & inibidores , Ensaios Clínicos Controlados Aleatórios como Assunto
6.
Ann Oncol ; 29(4): 992-997, 2018 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-29401241

RESUMO

Background: We assessed the non-inferiority of accelerated fractionation (AF) (2.4 Gy/fraction) compared with standard fractionation (SF) (2 Gy/fraction) regarding progression-free survival (PFS) in patients with T1-2N0M0 glottic cancer (GC). Patients and methods: In this multi-institutional, randomized, phase III trial, patients were enrolled from 32 Japanese institutions. Key inclusion criteria were GC T1-2N0M0, age 20-80, Eastern Cooperative Oncology Group performance status of 0-1, and adequate organ function. Patients were randomly assigned to receive either SF of 66-70 Gy (33-35 fractions), or AF of 60-64.8 Gy (25-27 fractions). The primary end point was the proportion of 3-year PFS. The planned sample size was 360 with a non-inferiority margin of 5%. Results: Between 2007 and 2013, 370 patients were randomized (184/186 to SF/AF). Three-year PFS was 79.9% (95% confidence interval [CI] 73.4-85.4) for SF and 81.7% (95% CI 75.4-87.0) for AF (difference 1.8%, 91% CI-5.1% to 8.8%; one-sided P = 0.047 > 0.045). The cumulative incidences of local failure at 3 years for SF/AF were 15.9%/10.3%. No significant difference was observed in 3-year overall survival (OS) between SF and AF. Grade 3 or 4 acute and late toxicities developed in 22 (12.4%)/21 (11.5%) and 2 (1.1%)/1 (0.5%) in the SF/AF arms. Conclusion: Although the non-inferiority of AF was not confirmed statistically, the similar efficacy and toxicity of AF compared with SF, as well as the practical convenience of its fewer treatment sessions, suggest the potential of AF as a treatment option for early GC. Clinical trials registration: UMIN Clinical Trial Registry, number UMIN000000819.


Assuntos
Carcinoma de Células Escamosas/radioterapia , Glote/patologia , Neoplasias Laríngeas/radioterapia , Radioterapia/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/patologia , Progressão da Doença , Fracionamento da Dose de Radiação , Feminino , Humanos , Neoplasias Laríngeas/patologia , Masculino , Pessoa de Meia-Idade , Adulto Jovem
7.
Rhinology ; 55(3): 269-273, 2017 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-28865140

RESUMO

OBJECTIVE: Residual sleepiness after continuous positive airway pressure (CPAP) is a critical problem in some patients with obstructive sleep apnea syndrome (OSAS). However, nasal surgery is likely to reduce daytime sleepiness and feelings of unrefreshed sleep. The aim of this study is to clarify the effects of nasal surgery and CPAP on daytime sleepiness. METHODOLOGY: This is a retrospective and matched-case control study. The participants were consecutive 40 patients with OSAS who underwent nasal surgery (Surgery group) and 40 matched patients who were treated with CPAP (CPAP group). RESULTS: In the Surgery group, although the nasal surgery did not decrease either apnea or hypopnea, it improved oxygenation, the quality of sleep. In the CPAP Group, the CPAP treatment reduced apnea and hypopnea, and improved oxygenation, quality of sleep. The degree of relief from daytime sleepiness was different between the two groups. The improvement of Epworth Sleepiness Scale was more significant in the Surgery Group than those in the CPAP Group (Surgery from 11.0 to 5.1, CPAP from 10.0 to 6.2). DISCUSSION: These findings suggest that the results of the nasal surgery is more satisfactory for some patients with OSAS than CPAP on daytime sleepiness.


Assuntos
Pressão Positiva Contínua nas Vias Aéreas/métodos , Polissonografia/métodos , Apneia Obstrutiva do Sono/cirurgia , Transtornos do Sono-Vigília/complicações , Estudos de Casos e Controles , Humanos , Procedimentos Cirúrgicos Nasais , Estudos Retrospectivos , Apneia Obstrutiva do Sono/fisiopatologia
8.
Oncogenesis ; 4: e150, 2015 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-26029824

RESUMO

Posttranslational modifications have critical roles in diverse biological processes through interactions. Tumor-suppressor protein p53 and nucleotide excision repair factor XPC each contain an acidic region, termed the acidic transactivation domain (TAD) and acidic fragment (AF), respectively, that binds to the pleckstrin homology (PH) domain of the p62 subunit of the transcription factor TFIIH. Human p53-TAD contains seven serine and two threonine residues, all of which can be phosphorylated. Similarly, XPC-AF contains six serine and two threonine residues, of which Thr117, Ser122 and Ser129 have been reported as phosphorylation sites in vivo, although their phosphorylation roles are unknown. Phosphorylation of Ser46 and Thr55 of p53-TAD increases its binding ability; however, the role of XPC-AF phosphorylation remains elusive. Here we describe a system for real-time and simultaneous monitoring of the phosphorylation and p62-PH affinity of p53-TAD and XPC-AF using nuclear magnetic resonance (NMR) spectroscopy. Unexpectedly, among seven reported kinases that presumably phosphorylate Ser46 and/or Thr55 of p53-TAD, only two specific and high-efficiency enzymes were identified: JNK2α2 for Ser46 and GRK5 for Thr55. During interaction with p62-PH, four different affinity complexes resulting from various phosphorylation states of p53-TAD by the kinases were identified. The kinetics of the site-specific phosphorylation reaction of p53-TAD and its affinity for p62-PH were monitored in real-time using the NMR system. Isothermic calorimetry showed that phosphorylation of Ser129 of XPC-AF increases binding to p62-PH. Although CK2 was predicted to phosphorylate Ser122, Ser129 and Ser140 from its sequence context, it specifically and efficiently phosphorylated only Ser129. Simultaneous monitoring of the phosphorylation and augmentation in p62-PH binding identified a key residue of p62-PH for contacting phosphorylated Ser129. In summary, we have established an NMR system for real-time and simultaneous monitoring of site-specific phosphorylation and enhancement of affinity between phosphorylation domains and their target. The system is also applicable to other posttranslational modifications.

9.
Br J Cancer ; 112(2): 357-64, 2015 Jan 20.
Artigo em Inglês | MEDLINE | ID: mdl-25321194

RESUMO

BACKGROUND: SET and MYND domain-containing protein 2 (SMYD2) is a lysine methyltransferase for histone H3, p53 and Rb and inhibits their transactivation activities. In this study, we tested whether SMYD2 (1q42) acts as a cancer-promoting factor by being overexpressed in gastric cancer. METHODS: We analysed 7 gastric cancer cell lines and 147 primary tumor samples of gastric cancer, which were curatively resected in our hospital. RESULTS: SET and MYND domain-containing protein 2 was detected in these cell lines (five out of seven cell lines; 71.4%) and primary tumor samples (fifty-six out of one hundred and forty-seven cases; 38.1%). Knockdown of SMYD2 using specific small interfering RNA inhibited proliferation, migration and invasion of SMYD2-overexpressing cells in a TP53 mutation-independent manner. Overexpression of SMYD2 protein correlated with larger tumor size, more aggressive lymphatic invasion, deeper tumor invasion and higher rates of lymph node metastasis and recurrence. Patients with SMYD2-overexpressing tumours had a worse overall rate of survival than those with non-expressing tumours (P=0.0073, log-rank test) in an intensity and proportion score-dependent manner. Moreover, multivariate analysis demonstrated that SMYD2 was independently associated with worse outcome (P=0.0021, hazard ratio 4.25 (1.69-10.7)). CONCLUSIONS: These findings suggest that SMYD2 has a crucial role in tumor cell proliferation by its overexpression and highlight its usefulness as a prognostic factor and potential therapeutic target in gastric cancer.


Assuntos
Expressão Gênica , Histona-Lisina N-Metiltransferase/metabolismo , Neoplasias Gástricas/enzimologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Linhagem Celular Tumoral , Proliferação de Células , Feminino , Técnicas de Silenciamento de Genes , Histona-Lisina N-Metiltransferase/genética , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Modelos de Riscos Proporcionais , Neoplasias Gástricas/mortalidade , Neoplasias Gástricas/cirurgia , Resultado do Tratamento , Proteína Supressora de Tumor p53/genética
10.
Br J Radiol ; 87(1038): 20130307, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24786147

RESUMO

OBJECTIVE: To compare the capability of differentiation of small-cell lung cancer (SCLC) from non-SCLC (NSCLC) between diffusion-weighted imaging (DWI) and short tau inversion recovery (STIR) turbo spin-echo imaging. METHODS: The institutional review board of Kobe University Hospital, Kobe, Japan, approved this study, and written informed consent was obtained from each patient. 49 patients with NSCLC (30 males and 19 females; mean age, 66.8 years) and 7 patients with SCLC (5 males and 2 females; mean age, 68.6 years) enrolled and underwent DWI and STIR. To quantitatively differentiate SCLC from NSCLC, apparent diffusion coefficient (ADC) values on DWI and contrast ratios (CRs) between cancer and muscle on STIR were evaluated. ADC values and CRs were then compared between the two cell types by Mann-Whitney's U-tests, and the diagnostic performances were compared by McNemar's test. RESULTS: There were significant differences of mean ADC values (p < 0.001) and mean CRs (p = 0.003). With adopted threshold values, the specificity (85.7%) and accuracy (85.7%) of DWI were higher than those of STIR (specificity, 63.3%; p = 0.001 and accuracy, 66.1%; p = 0.001). In addition, the accuracy of combination of both indexes (94.6%; p = 0.04) could significantly improve as compared with DWI alone. CONCLUSION: DWI is more useful for the differentiation of SCLC from NSCLC than STIR, and their combination can significantly improve the accuracy in this setting. ADVANCES IN KNOWLEDGE: Pulmonary MRI, including DWI and STIR, had a potential of the suggestion of the possibility as SCLC.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/diagnóstico , Imagem de Difusão por Ressonância Magnética/métodos , Imagem Ecoplanar/métodos , Neoplasias Pulmonares/diagnóstico , Carcinoma de Pequenas Células do Pulmão/diagnóstico , Adulto , Idoso , Idoso de 80 Anos ou mais , Diagnóstico Diferencial , Feminino , Humanos , Aumento da Imagem/métodos , Interpretação de Imagem Assistida por Computador , Masculino , Pessoa de Meia-Idade , Sensibilidade e Especificidade
11.
Gene Ther ; 21(6): 575-84, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24694533

RESUMO

The genetic transfer of T-cell receptors (TCRs) directed toward target antigens into T lymphocytes has been used to generate antitumor T cells efficiently without the need for the in vitro induction and expansion of T cells with cognate specificity. Alternatively, T cells have been gene-modified with a TCR-like antibody or chimeric antigen receptor (CAR). We show that immunization of HLA-A2 transgenic mice with tetramerized recombinant HLA-A2 incorporating HA-1 H minor histocompatibility antigen (mHag) peptides and ß2-microglobulin (HA-1 H/HLA-A2) generate highly specific antibodies. One single-chain variable region moiety (scFv) antibody, #131, demonstrated high affinity (KD=14.9 nM) for the HA-1 H/HLA-A2 complex. Primary human T cells transduced with #131 scFV coupled to CD28 transmembrane and CD3ζ domains were stained with HA-1 H/HLA-A2 tetramers slightly more intensely than a cytotoxic T lymphocyte (CTL) clone specific for endogenously HLA-A2- and HA-1 H-positive cells. Although #131 scFv CAR-T cells required >100-fold higher antigen density to exert cytotoxicity compared with the cognate CTL clone, they could produce inflammatory cytokines against cells expressing HLA-A2 and HA-1 H transgenes. These data implicate that T cells with high-affinity antigen receptors reduce the ability to lyse targets with low-density peptide/MHC complexes (~100 per cell), while they could respond at cytokine production level.


Assuntos
Antígeno HLA-A2/imunologia , Receptores de Antígenos de Linfócitos T/imunologia , Proteínas Recombinantes/imunologia , Linfócitos T/fisiologia , Animais , Anticorpos Monoclonais/genética , Anticorpos Monoclonais/imunologia , Especificidade de Anticorpos , Sequência de Bases , Linfócitos T CD4-Positivos/imunologia , Antígenos CD8/metabolismo , Epitopos/imunologia , Humanos , Camundongos Knockout , Camundongos Transgênicos , Dados de Sequência Molecular , Proteínas Recombinantes/genética , Anticorpos de Cadeia Única/genética , Anticorpos de Cadeia Única/imunologia , Linfócitos T Citotóxicos/imunologia , Microglobulina beta-2/genética
12.
Oncogene ; 33(17): 2236-44, 2014 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-23686309

RESUMO

Increasing evidence suggests that brain tumors arise from the transformation of neural stem/precursor/progenitor cells. Much current research on human brain tumors is focused on the stem-like properties of glioblastoma. Here we show that anaplastic lymphoma kinase (ALK) and its ligand pleiotrophin are required for the self-renewal and tumorigenicity of glioblastoma stem cells (GSCs). Furthermore, we demonstrate that pleiotrophin is transactivated directly by SOX2, a transcription factor essential for the maintenance of both neural stem cells and GSCs. We speculate that the pleiotrophin-ALK axis may be a promising target for the therapy of glioblastoma.


Assuntos
Neoplasias Encefálicas/metabolismo , Carcinogênese/metabolismo , Proteínas de Transporte/genética , Citocinas/genética , Glioblastoma/metabolismo , Células-Tronco Neoplásicas/metabolismo , Receptores Proteína Tirosina Quinases/metabolismo , Quinase do Linfoma Anaplásico , Animais , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/patologia , Proteínas de Transporte/metabolismo , Proliferação de Células , Citocinas/metabolismo , Regulação Neoplásica da Expressão Gênica , Glioblastoma/genética , Glioblastoma/patologia , Células HEK293 , Humanos , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Transplante de Neoplasias , Células-Tronco Neoplásicas/patologia , Células-Tronco Neoplásicas/fisiologia , Fatores de Transcrição SOXB1/metabolismo , Ativação Transcricional , Células Tumorais Cultivadas
13.
J Physiol Pharmacol ; 64(4): 453-63, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24101391

RESUMO

The extracellular calcium-sensing receptor (CaSR), a G protein-coupled cell receptor cloned from bovine parathyroid, has been demonstrated to play a regulatory role in various functions of the gastrointestinal tract. In the present study, we examined the effect of cinacalcet, a drug that acts as a calcimimetic through the allosteric activation of CaSR, on the loxoprofen-induced small intestinal lesions and investigated the mechanisms involved in the protective action. Male Sprague-Dawley rats were used without fasting. The animals were administered loxoprofen p.o. and euthanized 24 hours later and the intestinal mucosa was examined for lesions. Cinacalcet was given p.o. twice, 30 min before and 6 h after loxoprofen. Loxoprofen caused hemorrhagic lesions in the small intestine, accompanied by the upregulation of enterobacterial invasion, myeloperoxidase (MPO) activity and inducible nitric oxide synthase (iNOS)/tumor necrosis factor α (TNF-α) expression as well as the downregulation of Muc2 expression. Prior administration of cinacalcet dose-dependently and significantly reduced the severity of these lesions in response to loxoprofen, with concomitant suppression of the changes in bacterial invasion, iNOS/TNF-α as well as Muc2 expression, and myeloperoxidase activity. Cinacalcet also significantly reversed a decrease in mucus secretion and fluid secretion in the small intestine caused by loxoprofen, but had no effect on the intestinal hypermotility or prostaglandin E2 deficiency caused by loxoprofen. These results suggest that cinacalcet protects the small intestine against loxoprofen-induced damage, and this effect may be functionally associated with an increase in fluid secretion and a reversal of downregulation of Muc2 expression caused by loxoprofen, resulting in suppression of bacterial invasion and iNOS/TNF-α expression, the major pathogenic events in nonsteroidal antiinflammatory drugs-induced small intestinal ulceration.


Assuntos
Anti-Inflamatórios não Esteroides/efeitos adversos , Enteropatias/prevenção & controle , Naftalenos/uso terapêutico , Fenilpropionatos/efeitos adversos , Receptores de Detecção de Cálcio/agonistas , Animais , Carga Bacteriana , Cinacalcete , Dinoprostona/metabolismo , Enterobacteriaceae/isolamento & purificação , Enteropatias/induzido quimicamente , Enteropatias/metabolismo , Enteropatias/microbiologia , Intestino Delgado/efeitos dos fármacos , Intestino Delgado/metabolismo , Intestino Delgado/microbiologia , Masculino , Mucina-2/genética , Naftalenos/farmacologia , Óxido Nítrico Sintase Tipo II/genética , Oligopeptídeos/farmacologia , Peroxidase/metabolismo , RNA Mensageiro/metabolismo , Ratos , Ratos Sprague-Dawley , Receptores de Detecção de Cálcio/metabolismo , Fator de Necrose Tumoral alfa/genética
14.
Int J Immunopathol Pharmacol ; 26(2): 479-83, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23755763

RESUMO

Criteria from the World Health Organization (WHO) are commonly used to diagnose plasma cell myeloma (PCM), but they are complex and require several laboratory parameters. To differentiate reactive plasmacytosis from clonal plasma cell neoplasms, such as PCM, it is important to accurately determine the expression of the cytoplasmic immunoglobulin (cIg) light chain (LC). Through retrospective analyses, we selected the patients with PCM, and analyzed records of 52 PCM patients, who underwent bone biopsies, and final diagnosis of PCM was established according to WHO criteria, and 22 controls. In the present study, all samples were analyzed by flow cytometry (FC) in the side scatter vs CD38 histogram mode, and the CD38-gated plasma cell population was identified. The positive cell ratios of kappa and lambda to plasma cell populations were analyzed. PCM cells were distinguished from normal plasma cells by a cut-off level between 0.80 and 3.3, a sensitivity of 90.3 percent, and a specificity of 81.1 percent. Two-color FC analysis is simple to perform, inexpensive, and clinically relevant data are obtained soon after completion of the FC measurements. It could be one of the helpful tools in the diagnosis of PCM. The correct diagnosis of PCM can be achieved more simply, efficiently, and rapidly by combining this method.


Assuntos
ADP-Ribosil Ciclase 1/análise , Biomarcadores Tumorais/análise , Separação Celular/métodos , Citometria de Fluxo , Cadeias kappa de Imunoglobulina/análise , Cadeias lambda de Imunoglobulina/análise , Glicoproteínas de Membrana/análise , Mieloma Múltiplo/diagnóstico , Plasmócitos/imunologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Biópsia , Exame de Medula Óssea , Diagnóstico Diferencial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/sangue , Mieloma Múltiplo/imunologia , Valor Preditivo dos Testes , Estudos Retrospectivos
16.
Br J Cancer ; 108(6): 1324-31, 2013 Apr 02.
Artigo em Inglês | MEDLINE | ID: mdl-23422756

RESUMO

BACKGROUND: Several studies have demonstrated that YWHAZ (14-3-3ζ), included in the 14-3-3 family of proteins, has been implicated in the initiation and progression of cancers. We tested whether YWHAZ acted as a cancer-promoting gene through its activation/overexpression in gastric cancer (GC). METHODS: We analysed 7 GC cell lines and 141 primary tumours, which were curatively resected in our hospital between 2001 and 2003. RESULTS: Overexpression of the YWHAZ protein was frequently detected in GC cell lines (six out of seven lines, 85.7%) and primary tumour samples of GC (72 out of 141 cases, 51%), and significantly correlated with larger tumour size, venous and lymphatic invasion, deeper tumour depth, and higher pathological stage and recurrence rate. Patients with YWHAZ-overexpressing tumours had worse overall survival rates than those with non-expressing tumours in both intensity and proportion expression-dependent manner. YWHAZ positivity was independently associated with a worse outcome in multivariate analysis (P=0.0491, hazard ratio 2.3 (1.003-5.304)). Knockdown of YWHAZ expression using several specific siRNAs inhibited the proliferation, migration, and invasion of YWHAZ-overexpressing GC cells. Higher expression of the YWHAZ protein was significantly associated with the lower expression of miR-375 in primary GC tissues (P=0.0047). CONCLUSION: These findings suggest that YWHAZ has a pivotal role in tumour cell proliferation through its overexpression, and highlight its usefulness as a prognostic factor and potential therapeutic target in GC.


Assuntos
Proteínas 14-3-3/metabolismo , Biomarcadores Tumorais/metabolismo , Proliferação de Células , Recidiva Local de Neoplasia/patologia , Neoplasias Gástricas/patologia , Proteínas 14-3-3/antagonistas & inibidores , Proteínas 14-3-3/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Apoptose , Biomarcadores Tumorais/genética , Western Blotting , Adesão Celular , Movimento Celular , Feminino , Seguimentos , Perfilação da Expressão Gênica , Humanos , Técnicas Imunoenzimáticas , Metástase Linfática , Masculino , MicroRNAs/genética , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/genética , Recidiva Local de Neoplasia/metabolismo , Estadiamento de Neoplasias , Análise de Sequência com Séries de Oligonucleotídeos , Prognóstico , RNA Mensageiro/genética , RNA Interferente Pequeno/genética , Reação em Cadeia da Polimerase em Tempo Real , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Neoplasias Gástricas/genética , Neoplasias Gástricas/metabolismo , Taxa de Sobrevida , Células Tumorais Cultivadas
17.
Oncogene ; 32(33): 3840-5, 2013 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-22964630

RESUMO

Cancer stem cells are believed to be responsible for tumor initiation and development. Much current research on human brain tumors is focused on the stem-like properties of glioblastoma stem cells (GSCs). However, little is known about the molecular mechanisms of cell cycle regulation that discriminate between GSCs and differentiated glioblastoma cells. Here we show that cyclin D2 is the cyclin that is predominantly expressed in GSCs and suppression of its expression by RNA interference causes G1 arrest in vitro and growth retardation of GSCs xenografted into immunocompromised mice in vivo. We also demonstrate that the expression of cyclin D2 is suppressed upon serum-induced differentiation similar to what was observed for the cancer stem cell marker CD133. Taken together, our results demonstrate that cyclin D2 has a critical role in cell cycle progression and the tumorigenicity of GSCs.


Assuntos
Ciclo Celular/fisiologia , Ciclina D2/metabolismo , Glioblastoma/metabolismo , Células-Tronco Neoplásicas/metabolismo , Animais , Linhagem Celular Tumoral , Citometria de Fluxo , Glioblastoma/patologia , Humanos , Immunoblotting , Imuno-Histoquímica , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Células-Tronco Neoplásicas/patologia , Análise de Sequência com Séries de Oligonucleotídeos , Interferência de RNA , RNA Interferente Pequeno , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Transplante Heterólogo
19.
Rev. chil. pediatr ; 83(6): 587-594, dic. 2012. ilus
Artigo em Espanhol | LILACS | ID: lil-673074

RESUMO

Introducción: El síndrome 3M combina retardo de crecimiento prenatal y postnatal severo, dismorfias faciales (semeja facies "melancólica") y anomalías radiológicas. Es una enfermedad infrecuente de la que hasta el momento se han descrito alrededor de 200 casos. "3M" se refiere a las iniciales de los tres autores que describieron este síndrome. Los rasgos faciales característicos son: cabeza relativamente grande, dolicocefalia, abombamiento frontal, cara triangular, mentón prominente, nariz antevertida, labios gruesos, cejas gruesas, surco nasolabial largo e hipoplasia de tercio medio de cara. Los hallazgos radiológicos, que van apareciendo con la edad son costillas y huesos largos finos y delgados, y cuerpos vertebrales altos. El síndrome 3M se transmite como un rasgo autosómico recesivo y es genéticamente heterogéneo. Objetivo: Descripción del caso clínico de una nina actualmente de 10 años de edad en el que se confirmó este síndrome. Caso clínico: Nina referida a Genética a los 15 meses de vida, por talla baja severa, dismorfias y malformaciones. Su seguimiento clínico y radiológico permitió plantear y confirmar este diagnóstico. Conclusión: En ocasiones sólo el seguimiento longitudinal de pacientes con talla baja severa permite que se evidencien alteraciones sugerentes de un diagnóstico específico. La certificación del diagnóstico favorece un adecuado manejo clínico y consejería genética a los padres.


Introduction: 3M syndrome combines severe prenatal and postnatal growth delay, facial dysmorphism (resembles melancholy facies) and radiological abnormalities. It is a rare disease with 200 cases reported so far. "3M" refers to the initials of the three authors who first described this syndrome. The characteristic facial features are: relatively large head, dolichocephaly, frontal bossing, a triangular face, pointed chin, upturned nose, full lips, full eyebrows, long philtrum and hypoplastic midface. radiological findings which appear with age, include slender long bones and ribs and tall vertebral bodies. 3M syndrome is transmitted as an autosomal recessive trait and is genetically heterogeneous. Objective: Report the clinical case of a girl, now 10 years of age, diagnosed with the syndrome. Case report: An infant girl, 15 months old, was referred to Genetics Clinic due to severe short stature, dysmorphic features and malformations. Her clinical and radiological follow-up led to propose and confirm this diagnosis. Conclusion: Sometimes only longitudinal monitoring of patients with severe short stature evidence abnormalities suggesting a specific diagnosis. The right diagnosis results in suitable clinical care and genetic counseling to parents.


Assuntos
Humanos , Feminino , Criança , Coluna Vertebral/anormalidades , Coluna Vertebral , Nanismo/diagnóstico , Retardo do Crescimento Fetal , Fácies , Instabilidade Articular
20.
West Indian med. j ; 61(5): 532-537, Aug. 2012. tab
Artigo em Inglês | LILACS | ID: lil-672955

RESUMO

OBJECTIVE: Suicide rates in Japan were high in 1998 and have remained high since then. Many researchers have discussed the current state of suicide in Japan and the world; however, there are various opinions about the relationship between suicide and climate. SUBJECTS AND METHOD: In the present study, we report on long-term data of suicide and examine five climatic issues in Japan as a whole and in 10 selected prefectures: the five with the highest suicide rates in 2006 (Akita, Iwate, Shimane, Yamagata and Miyazaki Prefectures) and the five with the lowest (Nara, Tokushima, Okayama, Kanagawa and Kyoto Prefectures). RESULTS: Annual age-adjusted suicide rates were found to have a significant inverse correlation with annual mean air temperature in the five prefectures with the highest suicide rates and in the three prefectures with the lowest suicide rates among women. Annual age-adjusted suicide rates were significantly correlated with annual mean relative humidity in the three prefectures with the highest suicide rates among women and with the annual total sunshine duration in the three prefectures with the highest suicide rates among women. CONCLUSION: It is important that these associations between suicide and climatic factors be discussed further from various viewpoints, including those of many researchers and relevant organizations.


OBJETIVO: Las tasas de suicidio en Japón eran altas en 1998, y han permanecido altas desde entonces. Muchos investigadores han discutido el estado actual del suicidio en Japón y el mundo, Como parte de esa discusión, existen diversas opiniones acerca de la relación entre el suicidio y el clima. SUJETOS Y MÉTODO: El presente estudio presente constituye un reporte de datos a largo plazo sobre el suicidio y examina cinco problemas climáticos del Japón en su conjunto así como en 10 prefecturas seleccionadas: las cinco con las más altas tasas de suicidio en 2006 (las prefecturas de Akita, Iwate, Shimane, Yamagata y Miyazaki) y las cinco con las tasas más bajas (Nara, Tokushima, Okayama, Kanagawa y Kyoto). RESULTADOS: Se halló que las tasas de suicidio ajustadas por edad anualmente presentaban una correlación inversa significativa con la temperatura promedio anual del aire en las cinco prefecturas con las tasas de suicidio más altas y en las tres prefecturas con las tasas de suicidio más bajas entre las mujeres. Las tasas de suicidio anual ajustadas por edad guardaban una correlación significativa con la humedad relativa promedio anual en las tres prefecturas con las tasas del suicidio más altas entre las mujeres y con la duración total anual de sol en las tres prefecturas con las tasas del suicidio más altas entre las mujeres. CONCLUSIÓN: Es importante continuar analizando estas asociaciones entre el suicidio y los factores climáticos desde varios puntos de vista, incluyendo aquéllos de muchos investigadores y organizaciones pertinentes.


Assuntos
Feminino , Humanos , Masculino , Clima , Suicídio/estatística & dados numéricos , Umidade , Japão/epidemiologia , Fatores Sexuais , Suicídio/tendências , Luz Solar , Temperatura , Fatores de Tempo
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