Name: mechanical stimulation of chondrocyte-agarose hydrogels
Uploaded: 2012-10-27T19:00:00
Description: Watch this Scientific Journal Video about Mechanical Stimulation of Chondrocyte-agarose Hydrogels at JoVE.com

1. Isolamento de condrócitos articulares primárias Colheita 10-15 fatias de cartilagem de espessura completa das superfícies articulares das articulações de animais (por exemplo, a articulação metacarpo-falângica de vacas com esqueleto maduro obtido a partir de um matadouro local). <ol><li> Coloque fatias de cartilagem em uma placa de Petri de 100 mm e Incubar em 20 ml de 0,5% de protease em Ham F-12 (w / v) durante 2 horas a 37 ° C. Enxaguar três vezes em meio de Ham F-...

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<html> O método descrito para a aplicação de estímulos mecânicos controlados de hidrogéis de agarose de células-seeded permite a investigação directa sobre os efeitos de forças de compressão dinâmica sobre o metabolismo dos condrócitos. A utilização do equipamento de teste de costume em conjunto com os anéis de retenção fornecido restrição lateral para as construções, para evitar potenciais problemas de amostra de inflexão. O uso de placas mortos ponderados carregamento garantidos pelas tripulaçõ...

<table border="1"><tbody><tr><td> Nome do reagente ou do equipamento </td><td> Companhia </td><td> Número de catálogo </td><td> Comentários (opcional) </td></tr><tr><td> Ham F-12 </td><td> Thermo Fisher Scientific </td><td> SH3001002 </td><td></td></tr><tr><td> A colagenase </td><td> Sigma Aldrich Ltd. </td><td> C0130 </td><td></td></tr><tr><td> Protease </td><td> Sigma Aldrich Ltd. </td><td> P5147 </td><td></td></tr><tr><td> Soro Fetal Bovino </td><td> Sigma Aldrich Ltd. </td><td> F1051 </td><td></td></tr><tr><td> Ascorbato </td><td> Sigma Aldrich Ltd. </td><td> A4034 </td><td></td></tr><tr><td> Antibióticos / antimicóticos </td><td> Sigma Aldrich Ltd. </td><td> A5955 </td><td></td></tr><tr><td> HEPES </td><td> Bioshop Canada Ltd. </td><td> HEP001 </td><td></td></tr><tr><td> Trypan azul </td><td> Sigma Aldrich Ltd. </td><td> 93595 </td><td></td></tr><tr><td> Reichert Brilhante-Line Hemocitômetro </td><td> Hausser Scientific </td><td> 1490 </td><td></td></tr><tr><td> Quant-iT PicoGreen </td><td> Invitrogen </td><td> P7589 </td><td></td></tr><tr><td> Papaína a partir do látex </td><td> Sigma Aldrich Ltd. </td><td> P3125 </td><td></td></tr><tr><td> Acetato de amónio </td><td> Sigma Aldrich Ltd. </td><td> A1542 </td><td></td></tr><tr><td> Ácido Ethyldiaminetetraacetic </td><td> Sigma Aldrich Ltd. </td><td> E9884 </td><td></td></tr><tr><td> DL-Ditiotreitol </td><td> Sigma Aldrich Ltd. </td><td> 43819 </td><td></td></tr><tr><td> Baixo ponto de fusão de agarose, Tipo VII </td><td> Sigma Aldrich Ltd. </td><td> A9045 </td><td></td></tr> &lt;tr&gt; <td> Tela de malha (200) Filtrar </td><td> Sigma Aldrich Ltd. </td><td> S4145 </td><td></td></tr><tr><td> Mach-1 Tester micromecânico </td><td> Biomomentum Inc. </td><td> V500cs </td><td></td></tr><tr><td> Carregando compressão Jig </td><td> Custom-built </td><td></td><td> Produto similar pode ser fornecida por Biomomentum Inc. </td></tr><tr><td> Falcon 24 Placa Cultura Bem </td><td> Thermo Fisher Scientific </td><td> B353047 </td><td></td></tr><tr><td> β-Liquid Scintillation Counter </td><td> Beckman Coulter </td><td> LS6500 </td><td></td></tr><tr><td> [3H] prolina </td><td> Perkin-Elmer </td><td> NET323005MC </td><td></td></tr><tr><td> [35S] Enxofre </td><td> Perkin-Elmer </td><td> NEX041005MC </td><td></td></tr></tbody></table>

mechanical stimulation of chondrocyte-agarose hydrogels

A cartilagem articular sofre de uma capacidade limitada de reparação quando danificadas por insulto mecânico ou degradada pela doença, tais como a osteoartrite. Para sanar esta deficiência, várias intervenções médicas têm sido desenvolvidos. Um tal método é a ressurgir a área danificada com o tecido de cartilagem artificial, no entanto, a engenharia de tecidos tipicamente não tem as propriedades bioquímicas e durabilidade da cartilagem nativa, questionar a sua sobrevivência a longo prazo. Isto limita a aplicação de engenharia de tecidos de cartilagem para a reparação de pequenos defeitos focais, baseando-se o tecido circundante para proteger o material implantado. Para melhorar as propriedades do tecido desenvolvido, estimulação mecânica é um método popular utilizado para aumentar a síntese de matriz extracelular cartilaginosa, assim como as propriedades mecânicas dos resultantes da engenharia de tecidos. Estimulação mecânica aplica forças ao tecido constrói análoga àquelas experimentadas in vivo. Estebaseia-se na premissa de que o ambiente mecânico, em parte, regula o desenvolvimento e manutenção de 1,2 tecido nativo. A forma mais vulgarmente aplicado de estimulação mecânica na engenharia de tecidos de cartilagem é de compressão dinâmica em estirpes fisiológicas de aproximadamente 5-20%, com uma frequência de 1 Hz 1,3. Vários estudos investigaram os efeitos de compressão dinâmica e têm mostrado que para ter um efeito positivo sobre o metabolismo dos condrócitos e a biossíntese, em última análise afectar as propriedades funcionais do tecido desenvolvido 4-8. Neste artigo, vamos ilustrar o método para estimular mecanicamente construções condrócitos-agarose hidrogel sob compressão dinâmica e analisar as alterações na biossíntese através de testes bioquímicos e radioisótopo. Este método também pode ser facilmente modificado para avaliar as alterações potencialmente induzidos em resposta celular, como resultado de estímulos mecânicos.

Watch this Scientific Journal Video about Mechanical Stimulation of Chondrocyte-agarose Hydrogels at JoVE.com

Mechanical Stimulation of Chondrocyte-agarose Hydrogels

A biossíntese da matriz extracelular cartilaginosa por condrócitos podem ser afectadas pela aplicação de estímulos mecânicos. Este método descreve a técnica de aplicação de dinâmicas tensões compressivas para condrócitos encapsulados em construções em 3D e de avaliação de alterações induzidas no metabolismo dos condrócitos.

A estimulação mecânica de condrócitos-agarose Hidrogéis

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