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1.
Public Health ; 227: 187-193, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38237314

RESUMO

OBJECTIVES: This study aimed to investigate the association between adherence to 24-h movement guidelines and metabolic syndrome (MetS) before and during the COVID-19 pandemic. STUDY DESIGN: Repeated cross-sectional design. METHODS: We selected 10,882 adults (2019: n = 5710; 2020: n = 5172) aged ≥20 years from the Korea National Health and Nutrition Examination Survey. Domain-specific physical activity and sedentary behavior were assessed using a global physical activity questionnaire. We also measured the typical sleep duration (h/day) on weekdays and weekends. MetS was defined as the presence of more than three risk factors. RESULTS: During the COVID-19 pandemic, transportation-related physical activity decreased, while the prevalence of abdominal obesity (+3.3 %) and low HDL-C levels (+3.1 %) increased significantly. An elevated risk of MetS was observed in the lower aerobic (odds ratio [OR], 1.28; 95% confidence interval [CI], 1.04-1.58; P = 0.019) and muscular exercise (OR, 1.31; 95% CI, 1.04-1.66; P = 0.023) groups and in the high sedentary behavior (OR, 1.23; 95% CI, 1.00-1.51; P = 0.049) during the pandemic. Sensitivity analysis stratified by sex showed similar patterns with more pronounced changes in MetS components in males. The models also showed significant associations between aerobic physical activity, strength exercises, and sedentary behavior with MetS in males and females. CONCLUSIONS: Although sedentary behavior and sleep time remained unchanged, a significant decrease in transportation-related physical activity was observed during the pandemic. Moreover, our findings revealed that aerobic physical activity, strength exercise, and sedentary time during the pandemic were associated with an increased MetS risk. These results highlight the importance of promoting physical activity, particularly during periods of social restriction, to mitigate the pandemic's negative effects on metabolic health.


Assuntos
COVID-19 , Síndrome Metabólica , Adulto , Masculino , Feminino , Humanos , Síndrome Metabólica/epidemiologia , Pandemias , Inquéritos Nutricionais , Estudos Transversais , COVID-19/epidemiologia , COVID-19/complicações , República da Coreia/epidemiologia
2.
Pharmacogenomics J ; 15(4): 316-21, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25707394

RESUMO

We developed a genetic marker set of single nucleotide polymorphisms (SNPs) by summing risk scores of 14 SNPs showing a significant association with aspirin-exacerbated respiratory disease (AERD) from our previous 660 W genome-wide association data. The summed scores were higher in the AERD than in the aspirin-tolerant asthma (ATA) group (P=8.58 × 10(-37)), and were correlated with the percent decrease in forced expiratory volume in 1 s after aspirin challenge (r(2)=0.150, P=5.84 × 10(-30)). The area under the curve of the scores for AERD in the receiver operating characteristic curve was 0.821. The best cutoff value of the summed risk scores was 1.01328 (P=1.38 × 10(-32)). The sensitivity and specificity of the best scores were 64.7% and 85.0%, respectively, with 42.1% positive and 93.4% negative predictive values. The summed risk score may be used as a genetic marker with good discriminative power for distinguishing AERD from ATA.


Assuntos
Asma Induzida por Aspirina/genética , Marcadores Genéticos/genética , Estudo de Associação Genômica Ampla , Adulto , Idoso , Algoritmos , Área Sob a Curva , Asma Induzida por Aspirina/fisiopatologia , Feminino , Volume Expiratório Forçado , Humanos , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único/genética , Valor Preditivo dos Testes , Curva ROC , Testes de Função Respiratória , Medição de Risco , Sensibilidade e Especificidade
3.
Br J Anaesth ; 105(5): 661-7, 2010 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-20876698

RESUMO

BACKGROUND: Although remifentanil provides profound analgesia during operation, postoperative occurrence of hyperalgesia and tolerance after remifentanil administration could be a challenge to the postoperative pain control. In this investigation, we sought to determine the effect of maintenance with propofol or sevoflurane on postoperative analgesia after remifentanil-based anaesthesia. METHODS: Two hundred and fourteen women undergoing breast cancer surgery under remifentanil-based general anaesthesia were randomly included in this prospective and double-blind trial. The patients were anaesthetized with sevoflurane (S) or propofol (P) under high (H) or low (L) effect-site concentration (Ce) of remifentanil-based anaesthesia using a target-controlled infusion system; the patients were allocated into the SH, SL, PH, and PL groups. Pain intensity (visual analogue score, VAS) and cumulative morphine requirements were recorded 30 min, 1, 6, 12, and 24 h after operation. RESULTS: The patient characteristics were similar. Cumulative morphine consumption at 24 h after surgery was higher in the SH group [38.6 (sd 14.9)] compared with the SL [31.5 (3.7)], PH [31.7 (8.3)], and PL groups [30.1 (6.1)] (P<0.001). The VAS scores during 24 h after surgery were also higher in the SH group than the SL, PH, and PL groups (P<0.001). CONCLUSIONS: Remifentanil hyperalgesia was induced by high dose of remifentanil-based anaesthesia during sevoflurane anaesthesia, whereas that was not apparent during propofol anaesthesia. Also, remifentanil hyperalgesia did not occur during low dose of remifentanil-based anaesthesia. Maintenance of propofol during high-dose remifentanil-based anaesthesia provided better postoperative analgesia.


Assuntos
Analgésicos Opioides/efeitos adversos , Neoplasias da Mama/cirurgia , Hiperalgesia/induzido quimicamente , Dor Pós-Operatória/prevenção & controle , Piperidinas/efeitos adversos , Adulto , Idoso , Analgésicos Opioides/administração & dosagem , Anestésicos Inalatórios/farmacologia , Anestésicos Intravenosos/farmacologia , Método Duplo-Cego , Esquema de Medicação , Interações Medicamentosas , Feminino , Humanos , Éteres Metílicos/farmacologia , Pessoa de Meia-Idade , Morfina/administração & dosagem , Medição da Dor/métodos , Propofol/farmacologia , Estudos Prospectivos , Remifentanil , Sevoflurano
4.
Acta Anaesthesiol Scand ; 54(7): 885-93, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20039844

RESUMO

BACKGROUND: Sevoflurane is a widely used inhalation anesthetic, but there are no studies on its effect on the wound-healing process. This study was undertaken to evaluate the effect of exposure time to sevoflurane on wound healing. METHOD: Male Sprague-Dawley rats were used. Two circular full-thickness skin defects 8 mm in diameter were made on the dorsum of the rats. The animals were divided into six groups according to exposed gas type and time: S1 (sevoflurane, 1 h), S4 (sevoflurane, 4 h), S8 (sevoflurane, 8 h), O1 (oxygen, 1 h), O4 (oxygen, 4 h), and O8 (oxygen, 8 h). The surface area of the wounds was measured 0, 1, 3, and 7 days after surgery. Separately, the mean blood pressures (MBP) and arterial oxygen pressures (PaO(2)) were monitored during the sevoflurane exposure. Collagen type I production and transforming growth factor-beta1 (TGF-beta1) and basic fibroblast growth factor (bFGF) expression on the wound surface were analyzed. Routine histological analysis was also performed. RESULT: Exposure duration to sevoflurane had no influence on MBP and PaO(2). The reduction in wound size and collagen type I production was delayed in S8. The expression of TGF-beta1 and bFGF on the wound surface in S8 was significantly attenuated in S8. The histology of the S8 demonstrated a delayed healing status. CONCLUSIONS: Prolonged exposure to sevoflurane might alter the inflammatory phase of the wound-healing process by attenuation of growth factor expression such as TGF-beta1 and bFGF and subsequently by reduced collagen production.


Assuntos
Anestésicos Inalatórios/farmacologia , Colágeno/biossíntese , Peptídeos e Proteínas de Sinalização Intercelular/biossíntese , Éteres Metílicos/farmacologia , Cicatrização/efeitos dos fármacos , Ferimentos e Lesões/metabolismo , Animais , Pressão Sanguínea/efeitos dos fármacos , Western Blotting , Fator 2 de Crescimento de Fibroblastos/biossíntese , Imuno-Histoquímica , Masculino , Oxigênio/sangue , RNA/biossíntese , RNA/isolamento & purificação , Ratos , Ratos Sprague-Dawley , Sevoflurano , Fator de Crescimento Transformador beta1/biossíntese , Ferimentos e Lesões/patologia
5.
J Nanosci Nanotechnol ; 10(5): 3412-5, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20358968

RESUMO

The nanocrystalline zinc oxide (ZnO) thin films have been prepared by chemical bath deposition (CBD) method from aqueous zinc nitrate solution at room temperature (25 degrees C) and at higher temperature (75 degrees C). The changes in structural, morphological and optical properties were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and optical absorption. The structural studies revealed that the film deposited at room temperature showed mixed phases of ZnO and Zn(OH)2 with wurtzite and orthorhombic crystal structure whereas at higher temperature, the deposited film is ZnO with wurtzite crystal structure. After air annealing at 400 degrees C, all the films converted into pure ZnO with wurtzite crystal structure. The films deposited at room temperature showed fibrous surface morphology with interconnected flakes while films deposited at higher temperature shows well-developed nano-rod morphology. Optical study shows that band gap energy (E(g)) of as-deposited thin films deposited at room temperature and at higher temperature are 3.81 and 3.4 eV, decreases up to 3.20 eV, after annealing treatment.

6.
Eur J Vasc Endovasc Surg ; 35(3): 341-5, 2008 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-17988904

RESUMO

PURPOSE: To test the hypothesis that a proximal arterial occlusion has a protective effect on the progression of distal arterial disease, assessed by distal runoff resistance score (DRRS). MATERIALS AND METHODS: One hundred and nineteen patients (median age 64 y, male 96%) with a unilateral iliac and/or femoral arterial occlusion caused by atherosclerosis were analyzed retrospectively. DRRS was assessed on arteriograms of the test limb (with proximal arterial occlusion) and control limb (contralateral limb). Multivariate analysis was performed to determine if a proximal arterial occlusion was an independent risk factor for the development of a difference in the DRRS between the test and control limbs. RESULTS: The clinical features of the subjects were claudication in 85%, ankle brachial index 0.52 (median), diabetes in 30% and smoker in 76%. The upper leg DRRS of the test limb was significantly lower in the iliac occlusion group than in the control limb (1.87+/-1.69 vs 2.85+/-2.75, p=0.032). However, multivariate analysis failed to identify any risk factors associated with the difference in DRRS in both limbs. CONCLUSION: There was no evidence that a proximal arterial occlusion was associated with a slower progression of distal arterial disease.


Assuntos
Arteriopatias Oclusivas/fisiopatologia , Aterosclerose/fisiopatologia , Artéria Femoral , Artéria Ilíaca , Resistência Vascular , Idoso , Arteriopatias Oclusivas/epidemiologia , Aterosclerose/complicações , Comorbidade , Progressão da Doença , Feminino , Artéria Femoral/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Artéria Poplítea/fisiopatologia , Estudos Retrospectivos , Fatores de Risco , Estatísticas não Paramétricas , Artérias da Tíbia/fisiopatologia
7.
Eur J Anaesthesiol ; 25(9): 756-62, 2008 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-18426627

RESUMO

BACKGROUND AND OBJECTIVES: The purpose of this study was to investigate the acceptability and therapeutic efficacy of a preoperative single administration of long-acting 5-hydroxytryptamine type 3 (5-HT 3) receptor antagonist in an orally disintegrating tablet formulation, ramosetron, in breast cancer patients. METHODS: Two hundred and forty women, ASA I-II, aged 24-60 yr, undergoing elective breast cancer surgery, were randomized. A standardized anaesthetic technique was used. Patients were assigned to receive one of three treatment regimens (n = 80 in each group): no prophylactic antiemetics (Group A), single prophylactic intravenous injection of ramosetron 0.1 mg at the completion of surgery (Group B) or preoperatively oral administration of 0.1 mg of ramosetron (Group C). Episodes of nausea and vomiting, the use of rescue antiemetic treatment, degree of pain, adverse events and level of satisfaction were recorded. RESULTS: The overall incidence of nausea and vomiting during the first 24 h after the recovery in Groups B (27.8%) and C (25%) was decreased significantly compared with Group A (75.3%). The frequency of the use of rescue antiemetics was significantly lower in Group C (5.0%) compared with Groups A (53.2%) and B (15.2%). The patients in Group C were more satisfied with control of postoperative nausea and vomiting than others. CONCLUSION: Preoperative oral administration of ramosetron at a dose of 0.1 mg is an acceptable and effective way of reducing the incidence of postoperative nausea and vomiting in breast cancer patients.


Assuntos
Analgesia Controlada pelo Paciente/efeitos adversos , Antieméticos/administração & dosagem , Benzimidazóis/administração & dosagem , Náusea e Vômito Pós-Operatórios/prevenção & controle , Antagonistas da Serotonina/administração & dosagem , Administração Oral , Adulto , Analgésicos Opioides/uso terapêutico , Antieméticos/efeitos adversos , Benzimidazóis/efeitos adversos , Neoplasias da Mama/cirurgia , Feminino , Fentanila/uso terapêutico , Humanos , Pessoa de Meia-Idade , Medição da Dor , Satisfação do Paciente , Pré-Medicação , Antagonistas da Serotonina/efeitos adversos , Resultado do Tratamento
8.
Ann Oncol ; 18(12): 2009-14, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17785767

RESUMO

BACKGROUND: Genexol-PM is a novel Cremophor EL (CrEL)-free polymeric micelle formulation of paclitaxel (Taxol). This multicenter phase II study was designed to evaluate the efficacy and safety of the combination of Genexol-PM and cisplatin for the treatment of advanced non-small-cell lung cancer (NSCLC). PATIENTS AND METHODS: Patients with advanced NSCLC received Genexol-PM 230 mg/m(2) and cisplatin 60 mg/m(2) on day 1 of a 3-week cycle as first-line therapy. Intrapatient dose escalation of Genexol-PM to 300 mg/m(2) was carried out from the second cycle if the prespecified toxic effects were not observed after the first cycle. RESULTS: Sixty-nine patients were enrolled in this study. Overall response rate was 37.7%. The median time to progression was 5.8 months and the median survival period was 21.7 months. The major non-hematologic toxic effects included grade 3 peripheral sensory neuropathy (13.0%) and grade 3/4 arthralgia (7.3%). Four patients (5.8%) experienced grade 3/4 hypersensitivity reactions. The major hematological toxic effects were grade 3/4 neutropenia (29.0% and 17.4%, respectively). CONCLUSION: Genexol-PM plus cisplatin combination chemotherapy showed significant antitumor activity. The use of CrEL-free, polymeric micelle formulation of paclitaxel allowed administration of higher doses of paclitaxel compared with the CrEL-based formulation without significant increased toxicity.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Cisplatino/administração & dosagem , Feminino , Humanos , Masculino , Micelas , Pessoa de Meia-Idade , Paclitaxel/administração & dosagem , Polímeros , Resultado do Tratamento
9.
Clin Cancer Res ; 4(12): 3063-8, 1998 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-9865921

RESUMO

Paclitaxel induces a cell cycle block at G2-M phase by preventing the depolymerization of microtubules and induces p53-independent apoptosis in many cancer cells. We observed that gastric cancer cells treated with paclitaxel have shown a cyclin-dependent kinase (CDK)4 down-regulation. This paclitaxel-induced CDK4 down-regulation resulted in a cell cycle arrest at G1-S phase. To confirm this observation, we prepared stable transfectants that overexpressed CDK4 and analyzed the cell cycle progression. Ectopic expression of CDK4 in SNU cells resulted in a release of paclitaxel-induced G1 arrest. The release of G1 arrest by enforced expression of CDK4 seems to make the cells more sensitive to paclitaxel-induced apoptosis. From this finding, we could then suggest that paclitaxel treatment induces both G1-S and G2-M blocks in the cell cycle progression of gastric cancer cells.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Quinases Ciclina-Dependentes/metabolismo , Regulação para Baixo/efeitos dos fármacos , Fase G1/efeitos dos fármacos , Paclitaxel/farmacologia , Proteínas Proto-Oncogênicas , Neoplasias Gástricas/patologia , Apoptose/efeitos dos fármacos , Quinase 4 Dependente de Ciclina , Fase G2/efeitos dos fármacos , Humanos , Fase S/efeitos dos fármacos , Neoplasias Gástricas/tratamento farmacológico , Neoplasias Gástricas/metabolismo , Células Tumorais Cultivadas
10.
FEBS Lett ; 467(1): 70-4, 2000 Feb 04.
Artigo em Inglês | MEDLINE | ID: mdl-10664459

RESUMO

We previously identified a novel lectin cDNA from the fall webworm [Shin et al. (1998) Insect Biochem. Mol. Biol. 28, 827-837], which encodes two carbohydrate recognition domains (CRD-N and CRD-C) and is up-regulated following bacterial challenge. The lipopolysaccharide (LPS) binding activities of the recombinant CRD-N and CRD-C (rCRD-N and rCRD-C) were investigated by enzyme-linked immunosorbent assay. The LPS binding of rCRD-N and rCRD-C was pH-dependent: at pH below 6.0, they show a higher binding ability to LPS. The binding of the rCRD-N was inhibited by both D-mannose and N-acetyl-D-glucosamine, whereas the binding of the rCRD-C was inhibited only by D-mannose. The binding of both rCRD-N and rCRD-C to Escherichia coli was mainly mediated through the O-specific chain.


Assuntos
Lectinas/química , Lectinas/metabolismo , Mariposas , Antígenos O/química , Antígenos O/metabolismo , Acetilglucosamina/metabolismo , Sequência de Aminoácidos , Animais , Ligação Competitiva , Ensaio de Imunoadsorção Enzimática , Escherichia coli/química , Escherichia coli/genética , Concentração de Íons de Hidrogênio , Epitopos Imunodominantes/química , Epitopos Imunodominantes/genética , Epitopos Imunodominantes/metabolismo , Lectinas/genética , Lectinas/isolamento & purificação , Manose/metabolismo , Micelas , Dados de Sequência Molecular , Antígenos O/genética , Ligação Proteica , Proteínas Recombinantes de Fusão/química , Proteínas Recombinantes de Fusão/genética , Proteínas Recombinantes de Fusão/isolamento & purificação , Proteínas Recombinantes de Fusão/metabolismo , Alinhamento de Sequência , Deleção de Sequência/genética
11.
Insect Biochem Mol Biol ; 28(3): 163-71, 1998 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-9654739

RESUMO

cDNAs encoding chitinases were cloned and characterized from Bombyx mori and Hyphantria cunea, and their gene expression during the metamorphosis was also studied. The chitinase cDNA from B. mori encodes a protein of 565 amino acids with a calculated molecular mass of 63.4 kDa and the H. cunea chitinase cDNA encodes a protein of 553 amino acids with a calculated molecular mass of 62.0 kDa. Amino acid alignment of the two chitinases revealed 75% homology and 77-80% with M. sexta chitinase. The putative cleavage site of the signal peptide was between amino acid residues 20 and 21 for both chitinases. There were three potential N-glycosylation sites in the chitinase of B. mori at the amino acid residues 86-89, NFTS 304-307, NATG, 398-401, NYTV, whereas two potential N-glycosylation sites were present at the amino acid residues 86-89, NFTA and 304-307, NATG, in that of H. cunea. Southern blot analysis of total genomic DNA suggested that the B. mori genome has only one chitinase gene detectable by the cDNA probe and the H. cunea genome has one or two chitinase gene copies. Northern analysis indicated that gene expression was up-regulated during the molting process, larval-pupal transformation and pupal-adult transformation, when enzymatic degradation of cuticle was occurring.


Assuntos
Bombyx/enzimologia , Bombyx/genética , Quitinases/genética , DNA Complementar/genética , Mariposas/enzimologia , Mariposas/genética , Sequência de Aminoácidos , Animais , Sequência de Bases , Sítios de Ligação , Bombyx/crescimento & desenvolvimento , Quitinases/química , Quitinases/metabolismo , Clonagem Molecular , Primers do DNA/genética , Regulação da Expressão Gênica no Desenvolvimento , Regulação Enzimológica da Expressão Gênica , Genes de Insetos , Glicosilação , Manduca/enzimologia , Manduca/genética , Metamorfose Biológica/genética , Metamorfose Biológica/fisiologia , Dados de Sequência Molecular , Peso Molecular , Mariposas/crescimento & desenvolvimento , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Homologia de Sequência de Aminoácidos
12.
Insect Biochem Mol Biol ; 28(11): 827-37, 1998 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-9818384

RESUMO

Following injection of bacteria into the hemocoel of the fall webworm, Hyphantria cunea, several inducible genes were identified and characterized using PCR-based differential display (DD-PCR) and subtractive cloning. Ten immune-related cDNA clones (Hdd1, Hdd2, Hdd3, Hdd11, Hdd13, Hdd15, Hdd17, Hdd23, Hs106, Hs302) were isolated and characterized. The deduced amino acid sequence of Hdd2 was shown to be a member of the copper, zinc superoxide dismutase (Cu-Zn SOD) family. The H. cunea Cu-Zn SOD is novel in that it is up-regulated following a bacterial challenge and has a putative signal peptide suggesting its secretion and involvement in the insect immune response. Hdd3 was found to encode a new member of the serpin (serine protease inhibitor) family. The putative lectin corresponding to Hdd15 is of a different kind in that it has two lectin C domains in a single molecule. These two lectin C domains show significant homology to the lectin C domain of Periplaneta lipopolysaccharide binding protein (LPS-BP). Three cloned genes, Hdd17, Hs106 and Hs302, encode a homologue to Bombyx mori Gram negative binding protein, a hemolin-like protein and a attacin-like protein, respectively. The deduced amino acid sequences from Hdd11 showed weak homology with a Locusta migratoria hemolymph protein. On the contrary, Hdd1, Hdd13 and Hdd23 did not reveal any significant homology with known proteins. All of the 10 genes were clearly inducible by E. coli and M. luteus injection. Injection of distilled water only slightly induced mRNA levels. Comparison of temporal mRNA expression following E. coli injection showed three types of expression patterns.


Assuntos
DNA Complementar/isolamento & purificação , Escherichia coli/genética , Genes de Insetos , Mariposas/genética , Sequência de Aminoácidos , Animais , Clonagem Molecular , DNA Complementar/química , Lectinas/genética , Dados de Sequência Molecular , Mariposas/imunologia , Mariposas/microbiologia , Reação em Cadeia da Polimerase , RNA Mensageiro/análise , Alinhamento de Sequência , Serpinas/genética , Superóxido Dismutase/genética
13.
Insect Biochem Mol Biol ; 27(11): 983-92, 1997 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-9537761

RESUMO

Two kinds of cDNA clones encoding prophenoloxidases (ProPO; zymogen of phenoloxidase (monophenol, L-dopa: oxygen oxydoreductase, EC 1.14.18.1)) were isolated by polymerase chain reaction (PCR) followed by screening of cDNA library that was prepared from whole larvae of the fall webworm, Hyphantria cunea (Lepidoptera, Arctiidae). The cDNAs encode 681 and 697 amino acids with molecular masses of 78.2 and 80.2 kDa, respectively. Deduced amino acid sequence homology between the two H. cunea ProPOs are only 49% whereas the homology against other insect ProPOs ranged from about 40 to 72%. The phylogenic analysis showed that the insect ProPOs are grouped mainly into two families. A putative proteolytic cleavage site for enzyme activation was identical to other insect ProPOs. The conserved copper binding sites were 84-62% homologous to arthropod ProPOs. Two additional highly conserved regions were found in the carboxy terminal. Furthermore, like other insect prophenoloxidases, hydrophobic signal peptide sequences were absent in the deduced ProPOs from H. cunea. Southern blot analysis indicated that the H. cunea ProPO1 is present as a single copy in the genome. Northern blot analysis showed that the expression of the ProPO genes were concentrated in mid-instar larvae, but were much lower in other developmental stages.


Assuntos
Catecol Oxidase/genética , Precursores Enzimáticos/genética , Lepidópteros/enzimologia , Sequência de Aminoácidos , Animais , Sítios de Ligação , Catecol Oxidase/biossíntese , Catecol Oxidase/química , Clonagem Molecular , Sequência Conservada , DNA Complementar , Precursores Enzimáticos/biossíntese , Precursores Enzimáticos/química , Lepidópteros/genética , Dados de Sequência Molecular , Peso Molecular , Filogenia , Sinais Direcionadores de Proteínas/química , Proteínas Recombinantes/biossíntese , Proteínas Recombinantes/química , Alinhamento de Sequência , Homologia de Sequência de Aminoácidos
14.
Insect Biochem Mol Biol ; 27(8-9): 711-20, 1997.
Artigo em Inglês | MEDLINE | ID: mdl-9443371

RESUMO

A proteinous antimicrobial substance was purified from the bacteria-challenged larvae of the fall webworm, Hyphantria cunea. It is a cecropin-like antibacterial peptide which exhibits antibacterial activity against Gram-negative and Gram-positive bacteria, and known as Hyphantria cecropin A. The cDNA clones corresponding to this peptide were isolated from a cDNA library constructed from the bacteria-challenged larvae and obtained complete nucleotide sequences. In addition to the Hyphantria cecropin A sequence, we obtained three other cDNAs exhibiting high sequence similarity with Hyphantria cecropin A. We synthesized the C-terminally amidated peptide of 35 residues based on the deduced sequence of the isolated cDNA of Hyphantria cecropin A. The synthetic peptide exhibited strong antibacterial activity against several microbes including medically important bacteria such as Salmonella, Shigella, and fungus such as Candida. A Southern blot experiment using these cloned cDNAs as probes predicted the existence of multiple forms of Hyphantria cecropin genes.


Assuntos
Anti-Infecciosos , Peptídeos Catiônicos Antimicrobianos , Mariposas/genética , Peptídeos/genética , Sequência de Aminoácidos , Animais , Antibacterianos , Anti-Infecciosos/química , Sequência de Bases , Clonagem Molecular , DNA Complementar , Escherichia coli/efeitos dos fármacos , Escherichia coli/ultraestrutura , Expressão Gênica , Concentração de Íons de Hidrogênio , Larva , Dados de Sequência Molecular , Mariposas/crescimento & desenvolvimento , Mariposas/metabolismo , Peptídeos/química , Homologia de Sequência de Aminoácidos , Homologia de Sequência do Ácido Nucleico , Temperatura
15.
Neurochem Int ; 36(1): 19-26, 2000 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-10566955

RESUMO

We have investigated the expression of neuropeptide Y (NPY) in C6 glioma cells after the glutamatergic stimulation by the in situ RT-PCR and immunocytochemical techniques. The expression of NPY mRNA correlated well with immunocytological findings in each series of experiments. NPY protein expression was enhanced by glutamate (1, 10, 50, 100 microM, and 1 mM) dose-dependently, and its expression was slightly increased by N-methyl-D-aspartate (NMDA; 1, 10, 100, 500 microM, and 1 mM) and kainic acid (1, 10, 100, 300 microM, and 1 mM). We pretreated the cells with dopamine, haloperidol, pentylenetetrazol, and muscimol before each stimulation. The pentylenetetrazol and muscimol did not significantly alter the patterns of NPY expression induced by the glutamatergic stimulation. On the other hand, the dopamine and haloperidol pretreatment significantly elevated the levels of NPY expression that were induced by NMDA and kainic acid. Our results indicate that NPY release is closely related to glutamatergic stimulation, and it could be dynamically mediated by GABAergic and dopaminergic costimulation.


Assuntos
Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Ácido Glutâmico/farmacologia , Ácido Caínico/farmacologia , Neuropeptídeo Y/genética , Transcrição Gênica/efeitos dos fármacos , Animais , Dopamina/farmacologia , Glioma , Haloperidol/farmacologia , Muscimol/farmacologia , Pentilenotetrazol/farmacologia , RNA Mensageiro/genética , Ratos , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Células Tumorais Cultivadas
16.
Mol Cells ; 10(2): 186-92, 2000 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-10850660

RESUMO

We previously identified a serine type protease inhibitor (serpin) cDNA, using PCR-based differential display, in the fall webworm which was up-regulated following a bacterial challenge (Shin et al., 1998). The serpin cDNA was inserted into an expression vector and the serpin protein was expressed in Escherichia coli. In order to investigate the action of serpin in vivo, we examined the concentration of serpin protein in the larvae of Hyphantria cunea by Western blot analysis using a polyclonal antibody raised in a rabbit injected with recombinant serpin. H. cunea serpin was found mainly in the plasma with a molecular mass of 56.6 kDa on SDS-PAGE followed by Western blot analysis. The concentration of serpin in the plasma was slightly increased following bacterial challenge. A new 50.5 kDa (approx.) band was detected post E. coli and distilled water injection. Both E. coli and distilled water injection induced increased phenoloxidase (PO) activity in the plasma, although E. coli injection produced a larger increase in activity. Hyphantria serpin probably participates in negative regulation of the prophenoloxidase (proPO) cascade. Recombinant serpin inhibits PO activity in the hemocyte lysate fraction activated by LPS. There is a similarity between the P2-P2' region (NKFG) of the serpin reactive site loop and the S2-S2' region (NRFG) of the insect proPO maturation site. This indicates a form of competitive inhibition of serpin against a protease involved in the activation of proPO. A tyrosine residue in the P11 region of serpin, which is conserved in the S11 regions of all known proPOs maturation sites, provides further support for this hypothesis.


Assuntos
Catecol Oxidase/antagonistas & inibidores , Precursores Enzimáticos/antagonistas & inibidores , Proteínas de Insetos/metabolismo , Lepidópteros/metabolismo , Serpinas/metabolismo , Animais , Catecol Oxidase/metabolismo , Eletroforese em Gel de Poliacrilamida , Ativação Enzimática , Inibidores Enzimáticos/farmacologia , Precursores Enzimáticos/metabolismo , Genes de Insetos , Hemolinfa/enzimologia , Hemolinfa/metabolismo , Proteínas de Insetos/genética , Proteínas de Insetos/farmacologia , Larva/enzimologia , Larva/metabolismo , Monofenol Mono-Oxigenase/antagonistas & inibidores , Proteínas Recombinantes de Fusão/farmacologia , Alinhamento de Sequência , Serpinas/genética , Serpinas/imunologia , Serpinas/farmacologia
17.
Int J Hematol ; 73(2): 245-50, 2001 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-11372739

RESUMO

In this study, we summarize our long-term follow-up data of 24 patients who underwent autologous peripheral blood stem cell transplantation (PBSCT) using the dump-freezing method in a -80 degrees C freezer. Collected peripheral blood mononuclear cells were mixed with a cryoprotectant solution consisting of autologous plasma and 20% dimethyl sulfoxide, then placed in a -80 degrees C freezer. The recovery rate of mononuclear cells (MNCs), colony-forming unit-granulocyte/macrophage (CFU-GM) colonies, and CD34+ cells were calculated. Engraftment time (with neutrophil count > 0.5 x 10(9)/L, platelet count > 50 x 10(9)/L) and normal hemopoiesis (neutrophil count > 2 x 10(9)/L, platelet count > 100 x 10(9)/L) were evaluated. Median duration of cryopreservation was 76 days. The mean recovery rates of MNCs, CFU-GM colonies, and CD34+ cells were 93.4%, 78.4%, and 95.3%, respectively. The median engraftment times of neutrophils and platelets were 8 and 27 days, respectively. The median normal hemopoiesis times of neutrophil and platelet were 31 and 45 days, respectively. Nine patients are alive and in complete remission (CR). Seven patients in first CR sustained normal hemopoiesis with a median duration of 35 months. Two patients, who achieved second CR after salvage chemotherapy due to a leukemia relapse after PBSCT, maintained engraftment status for 24 and 28 months, and 1 reached normal hemopoiesis. These results demonstrate that PBSCT using the dump-freezing method in a -80 degrees C freezer leads to acceptable long-term engraftment stability.


Assuntos
Preservação de Sangue/métodos , Criopreservação , Dimetil Sulfóxido/farmacologia , Sobrevivência de Enxerto , Células-Tronco Hematopoéticas/citologia , Adolescente , Adulto , Preservação de Sangue/normas , Criança , Criopreservação/métodos , Criopreservação/normas , Dimetil Sulfóxido/efeitos adversos , Feminino , Sobrevivência de Enxerto/efeitos dos fármacos , Transplante de Células-Tronco Hematopoéticas/métodos , Transplante de Células-Tronco Hematopoéticas/normas , Células-Tronco Hematopoéticas/efeitos dos fármacos , Humanos , Técnicas In Vitro , Masculino , Pessoa de Meia-Idade , Taxa de Sobrevida , Resultado do Tratamento
18.
Oncology (Williston Park) ; 11(9 Suppl 10): 119-23, 1997 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-9348583

RESUMO

Thirty-nine patients with locally advanced or metastatic gastric carcinoma received oral UFT (tegafur and uracil) plus leucovorin. Treatment consisted of UFT 360 mg/m2/day plus leucovorin 25 mg/m2/day, given orally in divided daily doses for 21 days followed by a 7-day rest period. The median age of the patients was 64 years, and the median World Health Organization performance status was 2. Patients received a median of two courses of treatment (range, 1 to 25). Among 37 evaluable patients, two patients achieved a complete response, and eight had partial responses, for an overall response rate of 27% (95% confidence interval, 15.4% to 42.9%). Stable disease was reported in 12 patients (32%) and another 15 showed disease progression. The median duration of response was 30 weeks, and the median duration of survival was also 30 weeks (range, 8 to 111). All patients were evaluable for toxicity. Significant toxicity (World Health Organization grade 3 or 4) included diarrhea in seven patients (18%), oral mucositis in six (15%), and nausea/vomiting in six patients. We conclude that oral UFT plus leucovorin, an outpatient regimen, has favorable activity in patients with gastric carcinoma and has tolerable toxicities.


Assuntos
Antídotos/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma/tratamento farmacológico , Leucovorina/administração & dosagem , Neoplasias Gástricas/tratamento farmacológico , Tegafur/administração & dosagem , Uracila/administração & dosagem , Adulto , Idoso , Antídotos/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Carcinoma/mortalidade , Diarreia/induzido quimicamente , Combinação de Medicamentos , Feminino , Seguimentos , Humanos , Leucovorina/efeitos adversos , Leucopenia/induzido quimicamente , Masculino , Pessoa de Meia-Idade , Náusea/induzido quimicamente , Neoplasias Gástricas/mortalidade , Taxa de Sobrevida , Tegafur/efeitos adversos , Resultado do Tratamento , Uracila/efeitos adversos
19.
Am J Clin Oncol ; 19(2): 212-6, 1996 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-8610653

RESUMO

A phase II trial was performed with oral UFT plus leucovorin (LV) in 16 patients with advanced gastric carcinoma. Treatment consisted of UFT, 480 mg/m(2)/day, in conjunction with LV administered at 25 mg/m(2)/day per os in divided daily doses for 21 days followed by a 7-day rest period. The median age of patients was 64 years, with a median World Health Organization (WHO) performance status of 2. One patient was previously treated with etoposide, doxorubicin, and cisplatin (EAP). A median of four courses of treatment were given per patient (range: 1-9). Among 14 evaluable patients, one patient achieved a complete response and 3 had partial responses (response rate: 28.5%, 95% confidence interval, 4.9 to 52.3%). Stable disease was reported in 5 patients (35.7%) and another 5 showed progression. The time to progression was 17, 18, 27, and 76+ weeks for the responding patients, respectively. The median duration of survival was 25 weeks (range: 10-76+) for 14 evaluable patients. All patients were evaluable for toxicity. The main toxicity was diarrhea and oral mucositis. Significant toxicity (WHO grade 3 or 4) included diarrhea in 7 patients (43.8%), oral mucositis in 2 (12.5%), and nausea/vomiting in 2, respectively. We conclude that oral UFT plus LV, an out-patient regimen, has favorable activity in gastric carcinoma patients and has tolerable toxicities.


Assuntos
Antídotos/administração & dosagem , Antimetabólitos Antineoplásicos/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma/tratamento farmacológico , Leucovorina/administração & dosagem , Neoplasias Gástricas/tratamento farmacológico , Tegafur/administração & dosagem , Administração Oral , Adulto , Idoso , Antibióticos Antineoplásicos/administração & dosagem , Antimetabólitos Antineoplásicos/efeitos adversos , Antineoplásicos/administração & dosagem , Antineoplásicos Fitogênicos/administração & dosagem , Cisplatino/administração & dosagem , Diarreia/induzido quimicamente , Progressão da Doença , Doxorrubicina/administração & dosagem , Etoposídeo/administração & dosagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Indução de Remissão , Estomatite/induzido quimicamente , Taxa de Sobrevida , Tegafur/efeitos adversos , Vômito/induzido quimicamente
20.
Yonsei Med J ; 41(4): 536-9, 2000 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-10992819

RESUMO

Radiation therapy has been known to have a prophylactic effect for heterotopic ossification (HO), but until now it has not been known to have a therapeutic effect for established HO. We report a case of established HO compounded with a sudden increase in activity, that was improved with radiation therapy. A patient with traumatic brain injury had HO in both hips and thighs two months after the initial trauma. The existing level of HO activity suddenly increased seven months after the initial trauma, and was accompanied by severe pain that was refractory to indomethacin. We assumed that the pain was caused by the increased activity of HO on the basis of clinical symptoms and laboratory results. Initially, the patient received radiation therapy to the left lower extremity, with a total dose of 20 Gy in ten fractions. Next, the patient received radiation therapy at the same dosage to the right lower extremity, after which the pain and level of serum alkaline phosphatase significantly decreased. The patient experienced a mild pancytopenia as a side effect of the radiation therapy, but it was not severe enough to stop the radiation therapy, given the patient's suffering from the increased HO activity.


Assuntos
Lesões Encefálicas/complicações , Ossificação Heterotópica/radioterapia , Adulto , Humanos , Masculino
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