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1.
Vascular ; 30(2): 238-245, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33966507

RESUMO

INTRODUCTION: This retrospective study investigated the factors and the effects of different venous outflows on forearm arteriovenous graft patency. METHODS: The venous outflow sites included basilic, cephalic, median antecubital, and deep veins. Comparisons among multiple groups were analyzed. FINDINGS: A total of 179 patients with forearm loop arteriovenous grafts met the inclusion criteria. Of these, 72 were basilic, 48 were cephalic, 44 were median antecubital, and 15 were deep. The median observation period was 19 months. The survival rate was 84.9% at 24 months and 78.2% at 48 months. Primary, secondary, and assisted primary patency rates for all arteriovenous grafts were 48.9%, 72.4%, and 68.4% at 12 months; 13.8%, 33.9%, and 23.6% at 24 months; and 0.6%, 4.6%, and 2.3% at 48 months, respectively. Differences in primary patency were statistically significant compared with those of secondary and assisted primary patency (P < 0.05). Primary patency rates for cephalic, median antecubital, basilic, and deep were 47.9%, 48.6%, 47.7%, and 40.0% at 12 months and 12.5%, 13.9%, 22.7%, and 0% at 24 months, respectively. Secondary patency rates for cephalic, median antecubital, basilic, and deep were 75.0%, 69.4%, 75.0%, and 73.3% at 12 months and 39.6%, 30.6%, 38.6%, and 13.3% at 24 months, respectively. There was no significant difference in primary thrombosis among basilic, cephalic, median antecubital and deep. There were no significant differences observed in primary or secondary patency rates among all the groups. Stenoses in the venous anastomosis and outflow vein were frequently observed in all types of arteriovenous grafts. Central venous stenosis was most commonly seen in deep (26.67%). On average, 1.9 interventions per patient were performed on the graft to maintain function. CONCLUSION: Different venous outflow selections were not associated with long-term patency and the occurrence of thrombosis in hemodialysis forearm loop arteriovenous grafts.


Assuntos
Derivação Arteriovenosa Cirúrgica , Antebraço , Derivação Arteriovenosa Cirúrgica/efeitos adversos , Antebraço/irrigação sanguínea , Oclusão de Enxerto Vascular/diagnóstico por imagem , Oclusão de Enxerto Vascular/etiologia , Oclusão de Enxerto Vascular/terapia , Humanos , Diálise Renal/efeitos adversos , Estudos Retrospectivos , Fatores de Tempo , Resultado do Tratamento , Grau de Desobstrução Vascular
2.
Bioorg Chem ; 79: 334-340, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-29803080

RESUMO

Three cationic lipids derived from [12]aneN3 modified with naphthalimide (1a), oleic acid (1b) and octadecylamine (1c) were designed and synthesized. In vitro transfection showed that all these liposomes can deliver plasmid DNA into the tested cell lines. Among these liposomes, 1a gave the best transfection efficiency (TE) in A549 cells, which was higher than that of lipofectamine 2000. More importantly, the TE of 1a was dramatically increased in the presence of 10% serum. These results suggested that 1a might be a promising non-viral gene vector, and also give further insight for developing novel high performance gene delivery agents.


Assuntos
Técnicas de Transferência de Genes , Lipídeos/química , Luciferases/genética , Naftalimidas/química , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Relação Dose-Resposta a Droga , Humanos , Lipídeos/farmacologia , Luciferases/metabolismo , Estrutura Molecular , Naftalimidas/farmacologia , Relação Estrutura-Atividade , Transfecção
3.
Talanta ; 176: 382-388, 2018 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-28917765

RESUMO

A mitochondria-targetable probe Mito-DHP for nitric oxide (NO) was designed and synthesized by introducing dihydropyridine and triphenylphosphonium (TPP) moieties into boron dipyrromethene (BODIPY) dye. Mito-DHP was able to effectively detect nitric oxide through the aromatization of dihydropyridine to fluorescent pyridine product under oxygen-free conditions. The probe Mito-DHP showed high selectivity to NO over a number of reactive oxygen/nitrogen species (ROS/RNS) as well as high sensitivity (detection limit at 25nM), pH stability and bio-compatibility. Furthermore, Mito-DHP proved to target mitochondria specifically and to visualize both exogenous and endogenous NO in real time.


Assuntos
Compostos de Boro/química , Di-Hidropiridinas/química , Corantes Fluorescentes/química , Mitocôndrias/química , Óxido Nítrico/análise , Animais , Compostos de Boro/farmacologia , Sobrevivência Celular/efeitos dos fármacos , Di-Hidropiridinas/farmacologia , Corantes Fluorescentes/farmacologia , Células Hep G2 , Humanos , Camundongos , Mitocôndrias/efeitos dos fármacos , Mitocôndrias/metabolismo , Óxido Nítrico/química , Óxido Nítrico/metabolismo , Compostos Organofosforados/química , Compostos Organofosforados/farmacologia , Células RAW 264.7
4.
ACS Sens ; 2(4): 501-505, 2017 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-28723194

RESUMO

As part of an effort to develop generally applicable strategies for creating probes suitable for detecting important molecular and ionic species, the oxidative aromatization of nonfluorescent 9,10-dihydroacridine derivatives triggered by peroxynitrite (ONOO-) led to the identification of compound 2H, 9-phenyl-9,10-dihydroacridine-4-carboxylic acid, as a rapid-responding fluorescent probe capable of detecting ONOO- with an extraordinary selectivity. Adding a little more than 1 equiv of ONOO- to a solution of 2H resulted in over 100-fold fluorescence enhancement. In sharp contrast, treating 2H with excessive amounts of other oxidants that often interfere with the detection of ONOO- failed to lead to noticeable fluorescence increase. The reaction of ONOO- with 2H shows a similar efficiency in the pH range of 2-8. Low cytotoxicity was observed for 2H and its aromatized product. Bioimaging experiments revealed the promising potential of 2H as a new fluorescent probe for the selective detection of intracellular ONOO-.

5.
Chem Commun (Camb) ; 53(25): 3535-3538, 2017 Mar 23.
Artigo em Inglês | MEDLINE | ID: mdl-28280837

RESUMO

A rationally designed amphiphile containing a hydrophobic Hantzsch ester and a hydrophilic phosphate ester was able to form vesicles in aqueous solution, and resulted in the first example of a NO-responsive drug delivery system.


Assuntos
Portadores de Fármacos/química , Óxido Nítrico/química , Difusão Dinâmica da Luz , Ésteres/química , Interações Hidrofóbicas e Hidrofílicas , Micelas , Microscopia Eletrônica de Transmissão , Espectrometria de Fluorescência
6.
ACS Appl Mater Interfaces ; 9(13): 11546-11556, 2017 Apr 05.
Artigo em Inglês | MEDLINE | ID: mdl-28294601

RESUMO

Four gemini amphiphiles decorated with triazole-[12]aneN3 as the hydrophilic moiety and various long hydrocarbons as hydrophobic moieties, 1-4, were designed to form micelles possessing the aggregation-induced emission (AIE) property for gene delivery and tracing. All four amphiphiles give ultralow critical micelle concentrations, are pH-/photostable and biocompatible, and completely retard the migration of plasmid DNAs at low concentrations. The DNA-binding abilities of the micelles were fully assessed. The coaggregated nanoparticles of 1-4 with DNAs could convert back into AIE micelles. In vitro transfections indicated that lipids 1 and 2 and their originated liposomes bearing decent delivering abilities have great potentials as nonviral vectors. Finally, on the basis of the transfection and the transitions between condensates and micelles, lipid 2 was singled out as the first example for real-time tracing of the intracellular deliveries of nonlabeled DNA, which provides spatiotemporal messages about the processes of condensate uptake and DNA release.


Assuntos
Estilbenos/química , Técnicas de Transferência de Genes , Vetores Genéticos , Hidrocarbonetos , Lipídeos , Micelas , Transfecção
7.
Zhonghua Yi Xue Za Zhi ; 92(27): 1905-8, 2012 Jul 17.
Artigo em Chinês | MEDLINE | ID: mdl-23134963

RESUMO

OBJECTIVES: To discuss diagnosis and surgical management of penetrating cervical vascular trauma. METHODS: A retrospective clinical analysis of 22 penetrating carotid artery injuries. RESULTS: Twenty-two patients presented 32 vascular injuries, including innominate artery (n = 1), innominate vein (n = 2), subclavian artery (n = 6), subclavian vein (n = 2), common carotid artery (n = 3), internal carotid artery (n = 3), external carotid artery (n = 4), jugular vein (n = 8) and vertebral artery (n = 4). There were 12 patients with stab wounds, 2 with blast wound and 8 with iatrogenic injuries. Of these, there were 12 zone-1 injuries (38%), 19 zone-2 injuries (59%) and 1 zone-3 injury (3%). The distribution of 4 vertebral artery injuries were V1 (n = 1), V2 (n = 2) and V3 (n = 1). All patient received surgical and endovascular managements and got survival. CONCLUSIONS: Patients with penetrating cervical vascular injuries have high rate of mortality. Emergent surgical exploration is necessary for patients with hard signs of vascular injury such as hemodynamic instability, exsanguinating hemorrhage, or expanding hematoma. Those patients that are hemodynamically stable and who are without respiratory compromise should undergo further diagnostic imaging evaluation.


Assuntos
Lesões das Artérias Carótidas/cirurgia , Lesões do Pescoço/cirurgia , Ferimentos Penetrantes/cirurgia , Adolescente , Adulto , Criança , Feminino , Humanos , Veias Jugulares/lesões , Veias Jugulares/cirurgia , Masculino , Pessoa de Meia-Idade , Pescoço/irrigação sanguínea , Estudos Retrospectivos , Adulto Jovem
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