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1.
Diagnostics (Basel) ; 13(17)2023 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-37685393

RESUMO

In this study, we develop an innovative method that assists computer-aided diagnosis in the determination process of the exact location of the femoral neck junction in plain radiographs. Our algorithm consists of two phases, i.e., coarse prediction and fine matching, which are implemented by supervised deep learning method and unsupervised clustering, respectively. In coarse prediction, standard masks are first produced by a specialist and trained in our proposed feature propagation network (FPU-Net) with supervised learning on the femoral neck dataset. In fine matching, the standard masks are first classified into different categories using our proposed three parameters with unsupervised learning. The predicted mask from FPU-Net is matched with each category of standard masks by calculating the values of intersection of union (IOU), and finally the predicted mask is substituted by the standard mask with the largest IOU value. A total of 4320 femoral neck parts in anterior-posterior (AP) pelvis radiographs collected from China Medical University Hospital database were used to test our method. Simulation results show that, on the one hand, compared with other segmentation methods, the method proposed in this paper has a larger IOU value and better suppression of noise outside the region of interest; on the other hand, the introduction of unsupervised learning for fine matching can help in the accurate localization segmentation of femoral neck images. Accurate femoral neck segmentation can assist surgeons to diagnose and reduce the misdiagnosis rate and burden.

2.
Biomedicines ; 11(11)2023 Nov 20.
Artigo em Inglês | MEDLINE | ID: mdl-38002100

RESUMO

Nondisplaced femoral neck fractures are sometimes misdiagnosed by radiographs, which may deteriorate into displaced fractures. However, few efficient artificial intelligent methods have been reported. We developed an automatic detection method using deep learning networks to pinpoint femoral neck fractures on radiographs to assist physicians in making an accurate diagnosis in the first place. Our proposed accurate automatic detection method, called the direction-aware fracture-detection network (DAFDNet), consists of two steps, namely region-of-interest (ROI) segmentation and fracture detection. The first step removes the noise region and pinpoints the femoral neck region. The fracture-detection step uses a direction-aware deep learning algorithm to mark the exact femoral neck fracture location in the region detected in the first step. A total of 3840 femoral neck parts in anterior-posterior (AP) pelvis radiographs collected from the China Medical University Hospital database were used to test our method. The simulation results showed that DAFDNet outperformed the U-Net and DenseNet methods in terms of the IOU value, Dice value, and Jaccard value. Our proposed DAFDNet demonstrated over 94.8% accuracy in differentiating non-displaced Garden type I and type II femoral neck fracture cases. Our DAFDNet method outperformed the diagnostic accuracy of general practitioners and orthopedic surgeons in accurately locating Garden type I and type II fracture locations. This study can determine the feasibility of applying artificial intelligence in a clinical setting and how the use of deep learning networks assists physicians in improving correct diagnoses compared to the current traditional orthopedic manual assessments.

3.
J Exp Med ; 175(6): 1783-7, 1992 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-1350302

RESUMO

We have previously described multiallelic restriction fragment length polymorphisms of the C2 gene, suggesting the presence of a variable number of tandem repeats (VNTR) locus. We report here the cloning and sequencing of the polymorphic fragments from the two most common alleles of the gene, a and b. The results confirm the presence of a VNTR locus consisting of a nucleotide sequence, 41 bp in average length, repeated tandemly 23 and 17 times in alleles a and b, respectively. The difference in the number of repeats between the two alleles is due to the deletion/insertion of two noncontiguous segments, 143 and 118 bp long, of allele a, and of a 40-bp segment of allele b. The VNTR region is associated with a SINE (short interspersed sequence)-type retroposon, SINE-R.C2, located within the third intron of the C2 gene. SINE-R.C2 is a member of a previously described large retroposon family of the human genome, apparently derived from the human endogenous retrovirus, (HERV) K10, which is homologous to the mouse mammary tumor virus.


Assuntos
Complemento C2/genética , Elementos de DNA Transponíveis , Variação Genética , Polimorfismo de Fragmento de Restrição , Sequências Repetitivas de Ácido Nucleico , Retroviridae/genética , Alelos , Sequência de Bases , Clonagem Molecular , Cosmídeos , Humanos , Vírus do Tumor Mamário do Camundongo/genética , Dados de Sequência Molecular , Mapeamento por Restrição , Homologia de Sequência do Ácido Nucleico
4.
Nanotechnology ; 21(44): 445601, 2010 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-20935349

RESUMO

Magnetic nanoparticles are of great interest both for fundamental research and emerging applications. In the biomedical field, magnetite (Fe(3)O(4)) has shown promise as a hyperthermia-based tumor therapeutic. However, preparing suitable solubilized magnetite nanoparticles is challenging, primarily due to aggregation and poor biocompatibility. Thus methods for coating Fe(3)O(4) NPs with biocompatible stabilizers are required. We report a new method for preparing Fe(3)O(4) nanoparticles by co-precipitation within the pores of agar gel samples. Permeated agar gels were then dried and ground into a powder, yielding agar-conjugated Fe(3)O(4) nanoparticles. Samples were characterized using XRD, FTIR, TGA, TEM and SQUID. This method for preparing agar-coated Fe(3)O(4) nanoparticles is environmentally friendly, inexpensive and scalable.


Assuntos
Ágar/química , Química Verde/métodos , Nanopartículas de Magnetita/química , Sobrevivência Celular , Células Hep G2 , Humanos , Nanopartículas de Magnetita/ultraestrutura , Espectroscopia de Infravermelho com Transformada de Fourier , Termogravimetria , Difração de Raios X
5.
Int J Clin Pract ; 63(1): 126-33, 2009 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-17343659

RESUMO

This study is to investigate the clinical utility of detection of peripheral blood triggering receptor expressed on myeloid cells (TREM)-1 mRNA as an early indicator of sepsis among critically ill patients and to compare the results of TREM-1 with those of C-reactive protein (CRP). A prospective, non-interventional study of 127 patients with at least two criteria of the systemic inflammatory response (SIRS) was performed. TREM-1 was assessed by real-time quantitative reverse transcription-polymerase chain reaction. The diagnosis of SIRS only was made in 41 patients (32%), and the diagnosis of sepsis was made in other 86 patients (68%). TREM-1 mRNA expression had the comparably discriminative value to differentiate the presence from the absence of infection, with an area under the receiver-operating characteristic curve (AUC) of 0.75 [95% confidence interval (95% CI), 0.67-0.84] than CRP [AUC, 0.72 (95% CI, 0.62-0.81)]. As an indicator of sepsis, a TREM-1 mRNA expression ratio cutoff value of 58.8 had a sensitivity of 72%, a specificity of 71%, a positive likelihood ratio of 2.5 and a negative likelihood ratio of 0.39. Furthermore, TREM-1 mRNA expression was selectively higher in septic patients caused by extracellular bacteria or fungi [112.4 (19.3-680.1)], than in those caused by intracellular bacteria or viruses [18.8 (7.6-53.0), p < 0.001]. There was no difference in plasma CRP levels between both septic groups (p = 0.782). TREM-1 and CRP are similar diagnostic markers of sepsis. The different ability of extracellular and intracellular pathogens to induce TREM-1 expression may provide a potential marker for differential diagnosis.


Assuntos
Glicoproteínas de Membrana/metabolismo , Células Mieloides/metabolismo , RNA Mensageiro/metabolismo , Receptores Imunológicos/metabolismo , Sepse/diagnóstico , Adulto , Idoso , Biomarcadores/metabolismo , Proteína C-Reativa/metabolismo , Estado Terminal , Diagnóstico Diferencial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Sensibilidade e Especificidade , Receptor Gatilho 1 Expresso em Células Mieloides
6.
Clin Exp Immunol ; 151(3): 383-90, 2008 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18190609

RESUMO

Decoy receptor 3 (DcR3/TR6) is a decoy receptor for the Fas ligand (FasL) and can inhibit FasL-induced apoptosis. It has been reported recently that DcR3 can induce T cell activation via co-stimulation of T cells, suggesting that DcR3 may be involved in the pathophysiology of autoimmune diseases. This study aims to analyse the serum DcR3 in patients with systemic lupus erythematosus (SLE) and to investigate the role of DcR3 in the pathogenesis of SLE. Significantly elevated serum DcR3 was observed in SLE patients, and the mean serum DcR3 level was significantly higher for those with active disease [SLE disease activity index (SLEDAI) >/= 10] compared with that in patients with inactive disease (SLEDAI < 10). In addition to reducing activation-induced cell death in activated T cells via neutralization of the FasL, soluble DcR3-Fc enhanced T cell proliferation and increased interleukin-2 and interferon-gamma production via co-stimulation of T cells. Moreover, enhanced T cell reactivity to DcR3-induced co-stimulation was demonstrated in lymphocytes from patients with SLE, suggesting the elevated serum DcR3 may associate with enhanced T cell activation in vivo. These findings are the first to demonstrate that serum DcR3 concentrations are increased in SLE patients, and this may imply a possible role of DcR3 in the pathogenesis of SLE via enhanced T cell hyperreactivity and reduced apoptosis in activated T cells.


Assuntos
Lúpus Eritematoso Sistêmico/imunologia , Ativação Linfocitária/imunologia , Membro 6b de Receptores do Fator de Necrose Tumoral/sangue , Linfócitos T/imunologia , Adulto , Apoptose/imunologia , Proliferação de Células , Células Cultivadas , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Índice de Gravidade de Doença
7.
J Clin Invest ; 102(6): 1142-51, 1998 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-9739048

RESUMO

LIGHT is a new member of tumor necrosis factor (TNF) cytokine family derived from an activated T cell cDNA library. LIGHT mRNA is highly expressed in splenocytes, activated PBL, CD8(+) tumor infiltrating lymphocytes, granulocytes, and monocytes but not in the thymus and the tumor cells examined. Introduction of LIGHT cDNA into MDA-MB-231 human breast carcinoma caused complete tumor suppression in vivo. Histological examination showed marked neutrophil infiltration and necrosis in LIGHT expressing but not in the parental or the Neo-transfected MDA-MB-231 tumors. Interferon gamma (IFNgamma) dramatically enhances LIGHT-mediated apoptosis. LIGHT protein triggers apoptosis of various tumor cells expressing both lymphotoxin beta receptor (LTbetaR) and TR2/HVEM receptors, and its cytotoxicity can be blocked specifically by addition of a LTbetaR-Fc or a TR2/HVEM-Fc fusion protein. However, LIGHT was not cytolytic to the tumor cells that express only the LTbetaR or the TR2/HVEM or hematopoietic cells examined that express only the TR2/HVEM, such as PBL, Jurkat cells, or CD8(+) TIL cells. In contrast, treatment of the activated PBL with LIGHT resulted in release of IFNgamma. Our data suggest that LIGHT triggers distinct biological responses based on the expression patterns of its receptors on the target cells. Thus, LIGHT may play a role in the immune modulation and have a potential value in cancer therapy.


Assuntos
Apoptose , Genes Supressores de Tumor , Proteínas de Membrana/metabolismo , Receptores do Fator de Necrose Tumoral/metabolismo , Receptores Virais/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Mapeamento Cromossômico , Meios de Cultura Livres de Soro , Feminino , Técnicas de Transferência de Genes , Humanos , Hibridização in Situ Fluorescente , Interferon gama/metabolismo , Ligantes , Ativação Linfocitária , Linfócitos do Interstício Tumoral , Receptor beta de Linfotoxina , Masculino , Proteínas de Membrana/genética , Membro 14 de Receptores do Fator de Necrose Tumoral , Células Tumorais Cultivadas , Membro 14 da Superfamília de Ligantes de Fatores de Necrose Tumoral , Fator de Necrose Tumoral alfa/genética
8.
Comp Biochem Physiol B Biochem Mol Biol ; 147(2): 209-21, 2007 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-17329139

RESUMO

The objective of this study was to investigate the molecular mechanisms of gonadotropin-releasing hormone receptor (GnRH-R) involved in the endocrine regulation of reproduction in the orange-spotted grouper, Epinephelus coioides. The full-length cDNA encoding GnRH-R type I was successfully cloned from the pituitary by reverse-transcription polymerase chain reaction (RT-PCR) and rapid amplification of cDNA end (RACE) methods in the grouper. The complete GnRH-R type I cDNA is 1607 bp, which includes an open reading frame of 1092 bp encoding a protein of 364 amino acids, a seven-alpha helix transmembrane domain, a N-terminal extracellular domain, and a C-terminal cytoplasmic domain. The expression of GnRH-R type I was found to be highest in the pituitary. An intramuscular injection of various GnRH types in vivo was attempted. The expression of GnRH-R type I was stimulated by a single injection of salmon GnRH, while in the case of chicken GnRH II treatment, the expression of GnRH-R type I was inhibited. This suggests that the action of chick GnRH II is probably enhanced through the GnRH receptor of different forms. Furthermore, none of them were expressed by an injection of seabream GnRH, and this is likely attributed to the injection dose being below the threshold level, and this remains to be further examined. In conclusion, GnRHs of various types are effective in stimulating the expression of gonadotropins through various forms of the GnRH-R, and multiple forms of the receptor gene likely exist in teleosts.


Assuntos
Expressão Gênica , Perciformes/genética , Filogenia , Receptores LHRH/genética , Sequência de Aminoácidos , Animais , Sequência de Bases , Clonagem Molecular , Análise por Conglomerados , Biologia Computacional , Primers do DNA , DNA Complementar/genética , Hormônio Liberador de Gonadotropina/metabolismo , Dados de Sequência Molecular , Hipófise/metabolismo , Receptores LHRH/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Alinhamento de Sequência , Análise de Sequência de DNA
9.
Cell Death Differ ; 11 Suppl 1: S97-107, 2004 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-15002040

RESUMO

Recent evidence indicates that the decoy receptor 3 (DcR3) of the TNF receptor superfamily, which initially though prevents cytokine responses of FasL, LIGHT and TL1A by binding and neutralization, can modulate monocyte function through reverse signaling. We show in this work that DcR3 can induce osteoclast formation from human monocytes, murine RAW264.7 macrophages, and bone marrow cells. DcR3-differentiated cells exhibit characteristics unique for osteoclasts, including polynuclear giant morphology, bone resorption, TRAP, CD51/61, and MMP-9 expression. Consistent with the abrogation of osteoclastogenic effect of DcR3 by TNFR-Fc, DcR3 treatment can induce osteoclastogenic cytokine TNF-alpha release through ERK and p38 MAPK signaling pathways. We conclude that DcR3 via coupling reverse signaling of ERK and p38 MAPK and stimulating TNF-alpha synthesis is a critical regulator of osteoclast formation. This action of DcR3 might play an important role in significant osteoclastic activity in osteolytic bone metastases.


Assuntos
Diferenciação Celular/fisiologia , Glicoproteínas de Membrana/farmacologia , Monócitos/fisiologia , Osteoclastos/fisiologia , Fosfatase Ácida/genética , Fosfatase Ácida/metabolismo , Animais , Western Blotting , Células da Medula Óssea/efeitos dos fármacos , Células da Medula Óssea/metabolismo , Células da Medula Óssea/fisiologia , Reabsorção Óssea/metabolismo , Proteínas de Transporte/farmacologia , Diferenciação Celular/efeitos dos fármacos , Fusão Celular , Linhagem Celular , Citocinas/metabolismo , Citocinas/farmacologia , Dinoprostona/metabolismo , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Citometria de Fluxo , Expressão Gênica/efeitos dos fármacos , Humanos , Isoenzimas/genética , Isoenzimas/metabolismo , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Lipopolissacarídeos/farmacologia , MAP Quinase Quinase 4 , Fator Estimulador de Colônias de Macrófagos/farmacologia , Macrófagos/efeitos dos fármacos , Macrófagos/metabolismo , Macrófagos/fisiologia , Metaloproteinase 9 da Matriz/genética , Glicoproteínas de Membrana/fisiologia , Quinases de Proteína Quinase Ativadas por Mitógeno/metabolismo , Monócitos/efeitos dos fármacos , Monócitos/metabolismo , NF-kappa B/metabolismo , Óxido Nítrico/metabolismo , Osteoclastos/citologia , Osteoclastos/efeitos dos fármacos , Inibidores de Proteínas Quinases/farmacologia , Ligante RANK , Ratos , Ratos Sprague-Dawley , Receptor Ativador de Fator Nuclear kappa-B , Receptores de Superfície Celular/fisiologia , Receptores do Fator de Necrose Tumoral , Membro 6b de Receptores do Fator de Necrose Tumoral , Receptores Tipo I de Fatores de Necrose Tumoral/metabolismo , Receptores de Vitronectina/metabolismo , Fosfatase Ácida Resistente a Tartarato , Fator de Necrose Tumoral alfa/metabolismo , Fator de Necrose Tumoral alfa/farmacologia
10.
J Leukoc Biol ; 69(2): 280-8, 2001 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-11272279

RESUMO

We have explored the regulatory roles played by Ca2+-dependent signaling on lipopolysaccharide (LPS)-induced nitric oxide (NO), prostaglandin E2 (PGE2), tumor necrosis factor alpha (TNF-alpha), and interleukin-6 (IL-6) release in mouse peritoneal macrophages. To elevate intracellular Ca2+, we used thapsigargin (TG) and UTP. Although LPS alone cannot stimulate NO synthesis, co-addition with TG, which sustainably increased [Ca2+]i, resulted in NO release. UTP, via acting on P2Y6 receptors, can stimulate phosphoinositide (PI) turnover and transient [Ca2+]i increase, however, it did not possess the NO priming effect. LPS alone triggered the release of PGE2, TNF-alpha, and IL-6; all of which were potentiated by the presence of TG, but not of UTP. The stimulatory effect of LPS plus TG on NO release was inhibited by the presence of Ro 31-8220, Go6976, KN-93, PD 098059, or SB 203580, and abolished by BAPTA/AM and nuclear factor kappaB (NF-kappaB) inhibitor, PDTC. PGE2, TNF-alpha, and IL-6 release by LPS alone were attenuated by Ro 31-8220, Go6976, PD 098059, SB 203580, and PDTC. Using L-NAME, soluble TNF-alpha receptor, IL-6 antibody, NS-398, and indomethacin, we performed experiments to understand the cross-regulation by the four mediators. The results revealed that TNF-alpha up-regulated NO, PGE2, and IL-6 synthesis; PGE2 up-regulated NO, but down-regulated TNF-alpha synthesis; and PGE2 and IL-6 mutually up-regulated reciprocally. Taken together, murine peritoneal macrophages required a sustained [Ca2+]i increase, which proceeds after TG, but not UTP, stimulation, to enhance LPS-mediated release of inflammatory mediators, particularly for NO induction. Activation of PKC-, ERK-, and p38 MAPK-dependent signaling also are essential for LPS action. The positive regulatory interactions among these mediators might amplify the inflammatory response caused by endotoxin.


Assuntos
Adjuvantes Imunológicos/fisiologia , Mediadores da Inflamação/metabolismo , Lipopolissacarídeos/farmacologia , Macrófagos Peritoneais/enzimologia , Macrófagos Peritoneais/imunologia , Proteínas Quinases/fisiologia , Tapsigargina/farmacologia , Adjuvantes Imunológicos/farmacologia , Animais , Cálcio/metabolismo , Cálcio/fisiologia , Proteínas Quinases Dependentes de Cálcio-Calmodulina/fisiologia , Células Cultivadas , Dinoprostona/metabolismo , Interleucina-6/metabolismo , Líquido Intracelular/metabolismo , Líquido Intracelular/fisiologia , Macrófagos Peritoneais/efeitos dos fármacos , Macrófagos Peritoneais/metabolismo , Camundongos , Camundongos Endogâmicos BALB C , Proteínas Quinases Ativadas por Mitógeno/fisiologia , NF-kappa B/fisiologia , Óxido Nítrico/metabolismo , Proteína Quinase C/fisiologia , Receptores Purinérgicos P2/biossíntese , Fator de Necrose Tumoral alfa/metabolismo , Uridina Trifosfato/farmacologia , Proteínas Quinases p38 Ativadas por Mitógeno
11.
Comp Biochem Physiol B Biochem Mol Biol ; 141(1): 95-101, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15820139

RESUMO

Desaturation of fatty acids is an important adaptation mechanism for fish to maintain membrane fluidity under thermal stress. To comprehend the temperature adaptation mechanism in fish, we investigated the difference in the changes of stearoyl-CoA desaturase expression and fatty acid composition between milkfish and grass carp under cold acclimation. We find that in both fish the proportions of unsaturated fatty acids at 15 degrees C are all higher than those at 25 degrees C. In milkfish Delta(9)-desaturation index (ratios of 16:1/16:0 and 18:1/18:0) increases significantly in the beginning of cold acclimation at 15 degrees C and decreases afterward, but in grass carp it increases slightly in the beginning of cold acclimation followed by a sustained dramatic increase. Similarly, activity of stearoyl-CoA desaturase in milkfish increases significantly in the beginning, peaks at day 4, and then decreases constantly, but in grass carp it increases gradually in the first week, rises dramatically afterward, and then maintains a very high level. The change of stearoyl-CoA desaturase activity is parallel to the change of Delta(9)-desaturation index in both milkfish and grass carp, but it is one day earlier than Delta(9)-desaturation index in milkfish. The difference of adaptation capability between milkfish and grass carp under cold stress is further evidenced by RT-PCR and Northern blot analysis of stearoyl-CoA desaturase gene expression.


Assuntos
Adaptação Fisiológica , Ácidos Graxos/metabolismo , Peixes/fisiologia , Estearoil-CoA Dessaturase/metabolismo , Animais , Carpas/fisiologia , Temperatura Baixa , Ácidos Graxos/química , Ácidos Graxos Insaturados/química , Ácidos Graxos Insaturados/metabolismo , Microssomos Hepáticos/enzimologia , Estearoil-CoA Dessaturase/genética
12.
Eur J Radiol ; 34(1): 52-6, 2000 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-10802208

RESUMO

Visceral vascular abnormalities in patients with hereditary haemorrhagic teleangiectasia (HHT) include teleangiectasis, arteriovenous fistula (AVF), and aneurysms. Sonographic findings and colour Doppler ultrasound (CDU) features of HHT in the liver have been described in a few reports. Presented here is the CDU finding of liver with HHT involvement in two patients, aged 52 and 29 years, respectively. Power Doppler sonography was also performed in the first patient in whom both CDU and power Doppler sonography could demonstrate the abnormal vascular channels in the liver. In the second patient, aneurysms in the left hepatic lobe and of the splenic artery were noted. Angiography was performed in both patients and confirmed the abnormal vascular lesions demonstrated by CDU and/or power Doppler sonographic findings.


Assuntos
Aneurisma/diagnóstico por imagem , Artéria Hepática/diagnóstico por imagem , Telangiectasia Hemorrágica Hereditária/diagnóstico por imagem , Ultrassonografia Doppler em Cores , Adulto , Aneurisma/complicações , Feminino , Humanos , Fígado/diagnóstico por imagem , Pessoa de Meia-Idade , Artéria Esplênica/diagnóstico por imagem , Telangiectasia Hemorrágica Hereditária/complicações
13.
Comp Biochem Physiol B Biochem Mol Biol ; 130(4): 467-77, 2001 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-11691624

RESUMO

Stearoyl-CoA desaturase (EC 1.14.99.5) is a key enzyme in the biosynthesis of polyunsaturated fatty acids and the maintenance of the homeoviscous fluidity of biological membranes. The stearoyl-CoA desaturase cDNA in milkfish (Chanos chanos) was cloned by RT-PCR and RACE, and it was compared with the stearoyl-CoA desaturase in cold-tolerant teleosts, common carp and grass carp. Nucleotide sequence analysis revealed that the cDNA clone has a 972-bp open reading frame encoding 323 amino acid residues. Alignments of the deduced amino acid sequence showed that the milkfish stearoyl-CoA desaturase shares 79% and 75% identity with common carp and grass carp, and 63%-64% with other vertebrates such as sheep, hamsters, rats, mice, and humans. Like common carp and grass carp, the deduced amino acid sequence in milkfish well conserves three histidine cluster motifs (one HXXXXH and two HXXHH) that are essential for catalysis of stearoyl-CoA desaturase activity. However, RT-PCR analysis showed that stearoyl-CoA desaturase expression in milkfish is detected in the tissues of liver, muscle, kidney, brain, and gill, and more expression sites were found in milkfish than in common carp and grass carp. Phylogenic relationships among the deduced stearoyl-CoA desaturase amino acid sequence in milkfish and those in other vertebrates showed that the milkfish stearoyl-CoA desaturase amino acid sequence is phylogenetically closer to those of common carp and grass carp than to other higher vertebrates.


Assuntos
Clonagem Molecular , Estearoil-CoA Dessaturase/biossíntese , Estearoil-CoA Dessaturase/genética , Sequência de Aminoácidos , Animais , Sequência de Bases , DNA Complementar/metabolismo , Peixes , Humanos , Dados de Sequência Molecular , Filogenia , Polimorfismo Genético , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Análise de Sequência de DNA , Homologia de Sequência de Aminoácidos , Distribuição Tecidual
14.
Kaohsiung J Med Sci ; 16(6): 293-8, 2000 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-11584430

RESUMO

Since the introduction of national health insurance on March 1st 1995 in Taiwan, another 9 items (including appendectomy) were introduced into the Taiwan/prospective payment system (T/PPS). The modified T/PPS was based on those complicated appendectomy cases with secondary diagnosis or second operation where a total fee over 37,500 New Taiwan (NT) dollars was paid by National Health Insurance Bureau (NHIB) according to the real cost. The T/PPS was implemented in October 1997 due to the continuously increasing financial burden of medical expenses on the NHIB. The purpose of this study is (1) to compare the length of stay (LOS) and total medical expense of appendectomy of fee for service (FFS) and T/PPS and (2) to compare the clinical outcome of wound healing after discharge of the two systems by telephone interview. Our study investigated 100 consecutive appendectomy cases under FFS payment system and 99 consecutive appendectomy cases under T/PPS. We retrospectively analyzed LOS, operation time, and hospital cost of different items through chart review and computer data. Our results revealed that the LOS and operation time of T/PPS were significantly shorter than those of FFS (both p < 0.01). The total hospital cost, fee for room service, treatment, pharmacy, examination and anesthesia in T/PPS were also significantly less than those in FFS (all p < 0.01, except for anesthesia p < 0.05). There existed positive correlation between total hospital cost and LOS, operation time, fee for room service, treatment, pharmacy, examination and anesthesia both for T/PPS and FFS. To evaluate the clinical outcome of appendectomy between T/PPS and FFS, we interviewed 73 T/PPS cases and 73 FFS cases by telephone and chart review. Our results revealed that there were no significant differences in frequencies of having painful incision, clear incision wound on the day of discharge, and removal of stitches at hospital (p all > 0.05). We concluded that compared to FFS, T/PPS can decrease LOS and total hospital cost of appendectomy, and T/PPS's clinical outcome of appendectomy in T/PPS showed no significant difference from that in FFS.


Assuntos
Apendicectomia/economia , Planos de Pagamento por Serviço Prestado , Sistema de Pagamento Prospectivo , Adulto , Humanos , Tempo de Internação , Pessoa de Meia-Idade
15.
Percept Mot Skills ; 77(3 Pt 2): 1071-81, 1993 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-8170748

RESUMO

Since little is known concerning the cortical and cognitive effects resulting from the study of a tonal, logographic language which is read from top to bottom and in a right-to-left direction, neuropsychological and intellectual measures on 51 bilingual and 41 monolingual Chinese-American children aged 9 to 12 years were compared. Multivariate statistical analyses yielded significant group differences. As predicted, the over-all mean IQ of bilinguals was higher than that of monolinguals. Other than coding skills, expected superior performance of bilinguals on right-hemisphere or bilaterally sensitive measures was not found; rather, the left-dominant sequential abilities of bilinguals surpassed those of their monolingual peers. English fluency of the two groups was equivalent and monolingual youngsters obtained higher scores on two of five academic achievements tests than bilinguals. The effects of Chinese language instruction among Chinese-American children are discussed in relation to the distinguished educational accomplishments of Asian Americans.


Assuntos
Asiático/psicologia , Desenvolvimento da Linguagem , Testes Neuropsicológicos , Leitura , Atenção , Criança , China/etnologia , Escolaridade , Feminino , Humanos , Inteligência , Masculino , Rememoração Mental , Orientação , Desempenho Psicomotor , Vocabulário
16.
Clin Microbiol Infect ; 18(9): 870-6, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21999321

RESUMO

Repeated isolation of multidrug-resistant Acinetobacter baumannii (MDRAB) from respiratory secretions poses a great challenge for infection control. We conducted a retrospective case-control study to evaluate the efficacy and adverse effect of inhaled colistin methanesulfonate (CMS) in the eradication of MDRAB from the respiratory tract. Patients who were admitted to Taipei Veterans General Hospital between February 2009 and June 2010, had at least two sets of monomicrobial culture of MDRAB from respiratory secretions, and remained in hospital for at least 14 days after the first isolation of MDRAB (index day) were included. Patients who received intravenous CMS were excluded. Patients who received CMS inhalation for ≥ 3 days were selected as cases whereas the controls were matched for age and Acute Physiology and Chronic Health Evaluation II score. Thirty-nine cases and controls were identified. The duration of CMS inhalation was 10.9 ± 3.6 days. The use of inhaled CMS was the only independent factor associated with the eradication of MDRAB within 14 days after the index day (OR 266.33; 95% CI 11.26-6302.18, p <0.001), and shortened the duration of MDRAB recovery from the respiratory tract by 13.3 ± 1.45 days. The adverse effects were similar for both groups. The increase of colistin minimal inhibitory concentrations in the last isolate compared with the index isolate from the same patient did not differ between the two groups. In conclusion, our study demonstrated that inhaled CMS enhanced the eradication of MDRAB from the respiratory tract without significant clinical adverse effect or impact on colistin resistance.


Assuntos
Infecções por Acinetobacter/tratamento farmacológico , Acinetobacter baumannii/isolamento & purificação , Antibacterianos/administração & dosagem , Colistina/administração & dosagem , Infecções Respiratórias/tratamento farmacológico , APACHE , Infecções por Acinetobacter/epidemiologia , Infecções por Acinetobacter/microbiologia , Acinetobacter baumannii/efeitos dos fármacos , Administração por Inalação , Idoso , Idoso de 80 Anos ou mais , Estudos de Casos e Controles , Farmacorresistência Bacteriana Múltipla , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Infecções Respiratórias/epidemiologia , Infecções Respiratórias/microbiologia , Estudos Retrospectivos , Estatísticas não Paramétricas , Taiwan/epidemiologia
17.
Oncogene ; 29(9): 1374-83, 2010 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-19935704

RESUMO

Ezrin links cortical actin filaments with the cell membrane, and has a critical role in many membrane-initiated events. Fas is directly associated with ezrin, but conflicting results have been reported for the involvement of ezrin in Fas-induced cell death. In this study we show that ezrin was associated with Fas in T cells before stimulation and was released shortly after Fas ligand (FasL) engagement. The knockdown of ezrin moderately increased Fas-triggered or tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-triggered cell death in normal T lymphocytes and in H9 cells, but had no effect on death receptor-induced apoptosis in type II cells, such as Jurkat and CEM. Expression of a dominant-negative form of ezrin also led to an increased Fas-induced apoptosis in H9 cells. Ezrin deficiency did not affect the internalization of Fas after Fas ligation. Instead, an enhanced formation of death-inducing signaling complex (DISC) was observed in H9 cells with ezrin knockdown, leading to accelerated caspase-8 activation. Together, our results suggest that ezrin has a negative role in the recruitment of Fas into signaling complexes in type I T cells. Loss of ezrin likely removes the constraint imposed by ezrin and facilitates the assembly of death receptor complex in T cells.


Assuntos
Apoptose/fisiologia , Proteínas do Citoesqueleto/metabolismo , Proteína Ligante Fas/imunologia , Receptores de Morte Celular/metabolismo , Transdução de Sinais/fisiologia , Caspase 8/metabolismo , Morte Celular , Linhagem Celular Tumoral , Células Cultivadas , Proteína Ligante Fas/fisiologia , Humanos , Receptores de Morte Celular/efeitos dos fármacos , Receptores de Morte Celular/fisiologia , Linfócitos T , Ligante Indutor de Apoptose Relacionado a TNF
19.
Artigo em Inglês | MEDLINE | ID: mdl-16423547

RESUMO

Hyperglycemic response of freshwater giant prawn, Macrobrachium rosenbergii, under acute cold shock was investigated, and the involvement and stimulatory pathways of norepinephrine (NE) on induced-glycemia were further examined. Remarkable elevations in hemolymph glucose at comparable magnitude were observed in both intact and eyestalkless prawn under cold treatments, suggesting that hyperglycemic response of this species is not solely mediated through the actions of crustacean hyperglycemic hormone released from X-organ sinus gland complex on the target tissues, but NE is involved. Positive and significant correlations were noted between the hemolymph glucose titers and NE contents in both thoracic ganglia and the hemolymph, suggesting that NE plays a significant role in the hyperglycemic responses of this species under cold. Depressive effects of various adrenoceptor antagonists monitored in vivo and in vitro further suggest that the action of NE is primarily mediated through both alpha1- and beta1-adrenoceptors.


Assuntos
Hiperglicemia/patologia , Norepinefrina/fisiologia , Palaemonidae/metabolismo , Aminas/química , Aminas/metabolismo , Animais , Catecolaminas/metabolismo , Cromatografia Líquida de Alta Pressão , Temperatura Baixa , Dopamina/metabolismo , Glucose/metabolismo , Hemolinfa/metabolismo , Hiperglicemia/metabolismo , Metabolismo dos Lipídeos , Modelos Estatísticos , Norepinefrina/metabolismo , Células Fotorreceptoras de Invertebrados/metabolismo , Receptores Adrenérgicos/metabolismo , Temperatura , Sensação Térmica , Fatores de Tempo
20.
Conf Proc IEEE Eng Med Biol Soc ; 2006: 4731-4, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17946647

RESUMO

The paper presents an integrated, distributed Healthcare Enterprise Information Portal (HEIP) and Hospital Information Systems (HIS) framework over wireless/wired infrastructure at National Taiwan University Hospital (NTUH). A single sign-on solution for the hospital customer relationship management (CRM) in HEIP has been established. The outcomes of the newly developed Outpatient Information Systems (OIS) in HIS are discussed. The future HEIP blueprints with CRM oriented features: e-Learning, Remote Consultation and Diagnosis (RCD), as well as on-Line Vaccination Services are addressed. Finally, the integrated HEIP and HIS architectures based on the middleware technologies are proposed along with the feasible approaches. The preliminary performance of multi-media, time-based data exchanges over the wireless HEIP side is collected to evaluate the efficiency of the architecture.


Assuntos
Sistemas de Informação Hospitalar , Telemedicina/instrumentação , Redes de Comunicação de Computadores , Sistemas Computacionais , Computadores , Sistemas de Gerenciamento de Base de Dados , Desenho de Equipamento , Humanos , Sistemas de Informação , Internet , Sistemas Computadorizados de Registros Médicos , Pacientes Ambulatoriais , Software , Taiwan , Telemedicina/métodos
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