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1.
Niger J Clin Pract ; 27(2): 236-243, 2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-38409153

RESUMO

BACKGROUND: Compared to photon beam, carbon-ion radiotherapy (CIRT) has both physical and biological advantages. AIM: To examine whether two-dimensional (2D) CIRT is dosimetrically superior to photon beam volume-modulated arc therapy (VMAT) in protecting the normal tissues for stage III non-small-cell lung cancer (NSCLC). SUBJECTS AND METHODS: A retrospective study was conducted. Thirteen patients with stage III NSCLC treated in our center with curative CIRT and a sham photon beam VMAT treatment planning with the same normal tissue dose constraints were included for analysis. Target dose distributions and the homogeneity index (HI) within the planning target volumes were compared. RESULTS: Both CIRT and VMAT plans have good tumor coverage with no significant differences in D98, D95, and D50 of Planning target volume 1 (PTV1) between the two plans. The HIs between the two plans are similar. The HI of PTV2 is superior in the CIRT plan (CIRT vs. VMAT: 0.08 vs. 0.16, P < 0.05). In general, CIRT results in a lower dose of the organ-at-risk (OAR) than the photon plans. The V5, V10, V20, V30, V40, and Dmean of the contralateral lung in the CIRT plan are significantly lower than that of the photon VMAT. For the ipsilateral lung, the V5 of CIRT is significantly lower. The CIRT also had significantly lower spinal cord Dmax, esophageal Dmean and V50, V10 and V30 of bone, and V50 of the trachea and bronchial tree. CONCLUSIONS: Compared with photon VMAT, 2D-CIRT using the passive beam scanning technique significantly reduces the radiation dose to the OARs in curative radiotherapy of stage III NSCLC, suggesting a better protection of the normal tissues.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Neoplasias Pulmonares , Radioterapia de Intensidade Modulada , Humanos , Carcinoma Pulmonar de Células não Pequenas/diagnóstico por imagem , Carcinoma Pulmonar de Células não Pequenas/radioterapia , Radioterapia de Intensidade Modulada/métodos , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/radioterapia , Raios X , Estudos Retrospectivos , Planejamento da Radioterapia Assistida por Computador/métodos , Dosagem Radioterapêutica , Carbono
2.
Zhonghua Xin Xue Guan Bing Za Zhi ; 48(9): 765-771, 2020 Sep 24.
Artigo em Zh | MEDLINE | ID: mdl-32957760

RESUMO

Objective: To investigate the effects of clopidogrel resistence and CYP2C19 genotype on the clinical prognosis of acute coronary syndrome(ACS) patients undergoing percutaneous coronary intervention(PCI). Methods: This study was a retrospective cohort study. ACS patients who underwent PCI in Beijing Anzhen Hospital from October 2015 to January 2017 were recruited. The inhibition rate of adenosine diphosphate(ADP) was monitored by thromboelastography. All of these patients were divided into clopidogrel resistance and non-resistance group according to the monitoring results. CYP2C19 genotype was detected by TaqMan probe-based real-time quantitative PCR. Patients were divided into slow, medium and fast metabolic group, according to the CYP2C19 genotype. After 12 months of follow-up, the end points included all-cause death, cardiac death, angina, myocardial infarction, stent thrombosis, ischemic stroke and hemorrhage were collected. Combined thrombotic events were defined as a composite of angina, myocardial infarction, stent thrombosis and ischemic stroke. The differences of the incidence of clinical events between groups were compared. Cox regression was used to analyze the effects of clopidogrel resistance and CYP2C19 genotype on the combined thrombotic events, cardiac death and hemorrhage. Results: A total of 1 696 patients were included, and the age was (59.4±9.6) years, with 1 280(75.5%) males. There were 471 cases(27.8%) in clopidogrel resistance group, and 1 225 cases(72.2%) in clopidogrel non-resistance group. There were 218 patients(12.9%) were in slow metabolic group, 668(39.4%) in medium metabolic group, and 810 (47.8%) in fast metabolic group. The median follow-up time was 13.3 months, and 131 cases were lost to follow-up, with a loss follow-up rate of 7.7%. Compared with the clopidogrel non-resistance group, the clopidogrel resistance group had a higher incidence of myocardial infarction(7.6%(36/471) vs. 5.1%(62/1 225), P=0.041), a lower incidence of hemorrhage (13.2%(62/471) vs. 17.9%(219/1 225), P=0.020) and minor hemorrhage(11.5%(54/471) vs. 15.8% (194/1 225), P=0.022). There were no statistically significant difference in all-cause death, cardiac death, angina, stent thrombosis, ischemic stroke and severe bleeding between clopidogrel resistance and non-resistance group(all P>0.05). There was no statistically significant difference in the incidence of endpoint events among different CYP2C19 genotypes (all P>0.05). Cox regression analysis showed that clopidogrel resistance was an independent factor of combined thrombotic events (OR=2.334, 95%CI 1.215-4.443, P=0.016) and bleeding events (OR=0.481, 95%CI 0.174-0.901, P=0.023). While CYP2C19 genotype was not independent factor for combined thrombotic events, cardiac death and hemorrhage (all P>0.05). Conclusion: For ACS patients after PCI, clopidogrel resistance can increase the risk of combined thrombotic events, but also reduce the risk of bleeding; while CYP2C19 genotype is not an independent factor for clinical prognosis.


Assuntos
Síndrome Coronariana Aguda , Clopidogrel , Intervenção Coronária Percutânea , Inibidores da Agregação Plaquetária , Síndrome Coronariana Aguda/tratamento farmacológico , Síndrome Coronariana Aguda/genética , Clopidogrel/farmacologia , Clopidogrel/uso terapêutico , Citocromo P-450 CYP2C19/genética , Genótipo , Humanos , Masculino , Inibidores da Agregação Plaquetária/farmacologia , Inibidores da Agregação Plaquetária/uso terapêutico , Prognóstico , Estudos Retrospectivos , Resultado do Tratamento
3.
J Biol Regul Homeost Agents ; 33(5): 1437-1449, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31637902

RESUMO

Influenza has frequently been epidemic in recent years. However, the mechanisms of severe pneumonia with postinfluenza Streptococcus pneumoniae (SP) secondary infection have not been fully understood. In this study, we explored the mechanisms of pneumonia in postinfluenza A virus (IAV) infection via a mouse model. Mice were intranasally inoculated with SP three days after IAV inoculation. We then collected samples at three time points to dynamically observe the pathological progression. In IAV infection alone, lymphocyte infiltration and widened alveolar intervals were observed. In the blood, levels of the CD19+, CD19+CD21+ and CD19+CD79ß+B lymphocyte subpopulations were reduced, and IFN-γ and IL-10 were elevated. Slight atrophy was seen in the spleen, which was due to splenic B lymphocyteinitiated apoptosis through the mitochondrial pathway. When SP infection occurred after IAV infection, the pulmonary inflammation was significantly aggravated; a fair number of lymphocytes and neutrophils infiltrated simultaneously with exfoliated bronchial epithelial cells, vascular endothelial cells, widened alveolar septum and hemorrhaging. Increasing edema fluid and bacteria accumulated in the alveolar cavity. Decreased CD19+, CD19+CD21+ and CD19+CD79ß+B lymphocyte subpopulations and increased interferon gamma (IFN-γ) or interleukin 10 (IL-10) were more prominent compared to those with viral infection alone. Spleen atrophy resulting from coinfection was more obvious because of massive splenic B lymphocyte apoptosis through the mitochondrial pathway compared to viral infection alone. This study shows that although inflammation caused by SP infection alone was temporary, preceding IAV infection provided favorable conditions for SP colonization and multiplication by destroying lung structure and suppressing humoral immunity. Synergistic IAV-SP coinfection is likely to facilitate more SP colonization and promote B lymphocyte-suppression and reduction. Eventually, the pneumonia worsened.


Assuntos
Linfócitos B/imunologia , Infecções por Orthomyxoviridae/imunologia , Infecções Pneumocócicas/imunologia , Pneumonia Bacteriana/imunologia , Animais , Apoptose , Linfócitos B/citologia , Coinfecção/microbiologia , Coinfecção/virologia , Células Endoteliais , Vírus da Influenza A , Pulmão , Camundongos , Infecções por Orthomyxoviridae/microbiologia , Infecções Pneumocócicas/virologia , Streptococcus pneumoniae
5.
Clin Transl Oncol ; 19(2): 162-172, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27173517

RESUMO

PURPOSE: To investigate the potential candidate microRNA (miRNA) biomarkers for the clinical diagnosis, classification, and prognosis of gastric cancer (GC). METHODS: We use bioinformatics overlapping subclasses analysis to find the tumor grade and lymphatic metastasis-related GC specific miRNAs from the Cancer Genome Atlas (TCGA) database. Then, we further investigated these GC specific miRNAs distributions in different GC clinical features and their correlations overall survival on the basis of GC patients' information and their related RNA sequencing profile from TCGA. Finally, we randomly selected some of key miRNAs use qRT-PCR to confirm the reliability and validity. RESULTS: 22 GC specific key miRNAs were identified (Fold-change >2, P < 0.05), 11 of them were discriminatively expressed with tumor size, grade, TNM stage and lymphatic metastasis (P < 0.05). In addition, nine miRNAs (miR-196b-5p, miR-135b-5p, miR-183-5p, miR-182-5p, miR-133a-3p, miR-486-5p, miR-144-5p, miR-129-5p and miR-145-5p) were found to be significantly associated with overall survival (log-rank P < 0.05). Finally, four key miRNAs (miR-183-5p, miR-486-5p, miR-30c-2-3p and miR-133a-3p) were randomly selected to validation and their expression levels in 53 newly diagnosed GC patients by qRT-PCR. Results showed that the fold-changes between TCGA and qRT-PCR were 100 % in agreement. We also found miR-183-5p and miR-486-5p were significantly correlated with tumor TNM stage (P < 0.05), and miR-30c-2-3p and miR-133a-3p were associated with tumor differentiation degree and lymph-node metastasis (P < 0.05). These verified miRNAs clinically relevant, and the bioinformatics analysis results were almost the same. CONCLUSION: These key miRNAs may functions as potential candidate biomarkers for the clinical diagnosis, classification and prognosis for GC.


Assuntos
Adenocarcinoma/genética , Adenocarcinoma/secundário , Biomarcadores Tumorais/genética , MicroRNAs/genética , Neoplasias Gástricas/genética , Neoplasias Gástricas/patologia , Idoso , Estudos de Casos e Controles , Biologia Computacional , Progressão da Doença , Feminino , Seguimentos , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Humanos , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Estadiamento de Neoplasias , Análise de Sequência com Séries de Oligonucleotídeos , Prognóstico , Taxa de Sobrevida
6.
Chin Med J (Engl) ; 103(4): 304-7, 1990 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-2167822

RESUMO

The patients suffering from Coxsackie B viral myocarditis with depressed natural killer (NK) activity were treated with Astragulas membranaceus (AM) intramuscularly for 3-4 months. After the treatment, the NK activity was increased significantly from 11.5 +/- 11.9% before therapy to 44.9 +/- 15.0%. Another 6 patients of Coxsackie B viral myocarditis with depressed NK activity were treated with conventional therapy. The NK activity remained unchanged in 12.9 +/- 6%. The general condition and symptoms improved in all patients with AM therapy, while the titers of neutralizing antibody remained at the same level. Two days after AM treatment, the mean titers of alpha- and gamma-interferon (IFN) markedly increased in comparison with those before therapy and 3 weeks after AM therapy in 16 patients with Coxsackie B viral myocarditis, with left ventricular ejection fraction (LVEF) less than 65% and/or weak ventricular wall motion assayed by radionuclide angiocardiography. Whereas, in 12 patients treated with conventional therapy, there was no statistical difference among the results before and 2 days and 3 weeks after treatment. The results indicate that AM could partly regulate the lost of control of cellular immunity in patients with viral myocarditis.


Assuntos
Infecções por Coxsackievirus , Medicamentos de Ervas Chinesas/uso terapêutico , Interferon Tipo I/biossíntese , Interferon gama/biossíntese , Células Matadoras Naturais/imunologia , Miocardite/tratamento farmacológico , Enterovirus Humano B , Humanos , Miocardite/etiologia , Miocardite/imunologia
7.
Artigo em Zh | MEDLINE | ID: mdl-1873887

RESUMO

The present paper reports the protoscolicidal action of hydrastine, ether-acetic acid-ethanol admixture, H2O2, pyquiton and albendazole through in vitro or in vivo exposure, for 15 minutes and transplantation studies. The mortality of protoscolices in vitro and in vivo were 70.2% and 68.9% for 0.3% hydrastine, 56.8% and 56.2% for 10% ether-acetic acid-ethanol admixture, 6.0% and 8.8% for 0.3% H2O2; 6.1% for 0.004% pyquiton in vitro and 5.0% were 10% and 25% for 0.3% hydrastine, 30% and for 0.004% albendazole in vitro. The survival rates after transplantation of protoscolices 37.5% for 10% ether-acetic acid-ethanol admixture, 100% and 95% for 0.3% H2O2 respectively. Disruption of external plasma membrane, hook detachment, sucker deformity of protoscolices exposed to hydrastine were demonstrated by scanning electron microscopy. It is suggested that hydrastine exerts a profound intracellular effect on the protoscolex of E. granulosus of sheep and man, and might be a promising protoscolicide as adjuvant to hydatid surgery.


Assuntos
Alcaloides/farmacologia , Echinococcus/efeitos dos fármacos , Acetatos/farmacologia , Albendazol/farmacologia , Alcaloides/análise , Animais , Benzilisoquinolinas , Medicamentos de Ervas Chinesas/química , Equinococose Hepática/tratamento farmacológico , Echinococcus/ultraestrutura , Etanol/farmacologia , Éter/farmacologia , Camundongos , Praziquantel/farmacologia
14.
Zhongguo Yao Li Xue Bao ; 10(2): 185-7, 1989 Mar.
Artigo em Zh | MEDLINE | ID: mdl-2816421

RESUMO

The ultrastructural changes in the germinal membranes of Echinococcus granulosus cysts treated with d-hydrastine (3.75 mg/(kg.d), ig) for 20 d were studied. Cysts from d-hydrastine treated mice were shown by transmission electron microscope to have dissolution of the microtriches, disturbance of organelles in their arrangement, dilatation and disruption of microtubules, increase in size and number of lysosomes, a decrease in number of Golgi complexes and lessening in density and swelling of mitochondria. Under scanning electron microscope, many pits arising from the outer and inner surfaces of the germinal membrane were observed. It seems that d-hydrastine has a profound intracellular effect on experimental Echinococcus granulosus cysts in mice, and that it may be a promising drug for treating hydatidosis.


Assuntos
Alcaloides/farmacologia , Anticestoides , Equinococose/tratamento farmacológico , Animais , Benzilisoquinolinas , Equinococose/patologia , Echinococcus/efeitos dos fármacos , Echinococcus/ultraestrutura , Feminino , Camundongos
15.
Zhongguo Yao Li Xue Bao ; 14(5): 424-6, 1993 Sep.
Artigo em Zh | MEDLINE | ID: mdl-8010032

RESUMO

The effects of salidroside (p-hydroxyphenethyl glucoside, Sal, first isolated and synthesized in China) on reoxygenation damages were studied on cultured myocytes from neonatal rat hearts. At least 80% of cells in the form of monolayer contracted spontaneously on cultured 72 h, then the cells were used in the contractility experiment. After anoxia 3 h and reoxygenation for 1 h the beating of myocardial cells was slowed down and the lactate dehydrogenase (LDH) liberated by myocardial cells was increased. Electron microscopy of myocardial cells revealed localized defects of cell membrane, dilatation of endoplasmic reticulum, and swelling of mitochondria. One h before anoxia, addition of Sal 10 and 30 micrograms.ml-1 increased the beat rate of myocardial cells, depressed the release LDH of from myocytes, and the myocardial ultrastructure was normal during anoxia and reoxygenation. Hence Sal may provide some protective effects on the anoxia/reoxygenation damages upon myocardium.


Assuntos
Glucosídeos/farmacologia , Miocárdio/ultraestrutura , Fenóis , Animais , Hipóxia Celular/efeitos dos fármacos , Células Cultivadas , Feminino , Glucosídeos/isolamento & purificação , Frequência Cardíaca/efeitos dos fármacos , L-Lactato Desidrogenase/metabolismo , Masculino , Miocárdio/metabolismo , Plantas Medicinais/química , Ratos , Ratos Sprague-Dawley
16.
Blood ; 72(2): 567-72, 1988 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-3165295

RESUMO

Twenty-four patients with acute promyelocytic leukemia (APL) were treated with all-trans retinoic acid (45 to 100 mg/m2/day). Of these, eight cases had been either nonresponsive or resistant to previous chemotherapy; the other 16 cases were previously untreated. All patients attained complete remission without developing bone marrow hypoplasia. Bone marrow suspension cultures were studied in 15 of the 24 patients. Fourteen of these patients had morphological maturation in response to the retinoic acid (1 mumol/L). Chloroacetate esterase and alpha-naphthyl acetate esterase staining as well as electronmicroscopic examination confirmed that retinoic acid-induced cells differentiated to granulocytes with increased functional maturation (as measured by nitroblue tetrazolium reduction, NBT). The single nonresponder to retinoic acid in vitro was resistant to treatment with retinoic acid but attained complete remission after addition of low-dose cytosine arabinoside (ara-C). During the course of therapy, none of the patients showed any abnormalities in the coagulation parameters we measured, suggesting an absence of any subclinical disseminated intravascular coagulation. The only side effects consisted of mild dryness of the lips and skin, with occasional headaches and digestive symptoms. Eight patients have relapsed after 2 to 5 months of complete remission. The others remain in complete remission at 1+ to 11+ months and are still being followed up. We conclude that all-trans retinoic acid is an effective inducer for attaining complete remission in APL.


Assuntos
Leucemia Mieloide Aguda/tratamento farmacológico , Tretinoína/uso terapêutico , Adolescente , Adulto , Medula Óssea/efeitos dos fármacos , Diferenciação Celular , Células Cultivadas , Criança , Pré-Escolar , Coagulação Intravascular Disseminada/etiologia , Feminino , Humanos , Leucemia Mieloide Aguda/patologia , Masculino , Pessoa de Meia-Idade , Fatores de Tempo , Tretinoína/efeitos adversos
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