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1.
Acta cir. bras ; 27(4): 283-289, Apr. 2012. ilus
Article in English | LILACS | ID: lil-622351

ABSTRACT

PURPOSE: To evaluate the implant of human adipose derived stem cells (ADSC) delivered in hyaluronic acid gel (HA), injected in the subcutaneous of athymic mice. METHODS: Control implants -HA plus culture media was injected in the subcutaneous of the left sub scapular area of 12 athymic mice. ADSC implants: HA plus ADSC suspended in culture media was injected in the subcutaneous, at the contra lateral area, of the same animals. With eight weeks, animals were sacrificed and the recovered implants were processed for extraction of genomic DNA, and histological study by hematoxilin-eosin staining and immunufluorescence using anti human vimentin and anti von Willebrand factor antibodies. RESULTS: Controls: Not visualized at the injection site. An amorphous substance was observed in hematoxilin-eosin stained sections. Human vimentin and anti von Willebrand factor were not detected. No human DNA was detected. ADSC implants - A plug was visible at the site of injection. Fusiform cells were observed in sections stained by hematoxilin- eosin and both human vimentin and anti von Willebrand factor were detected by immunofluorescence. The presence of human DNA was confirmed. CONCLUSION: The delivery of human adipose derived stem cells in preparations of hyaluronic acid assured cells engraftment at the site of injection.


OBJETIVO: Avaliar o implante de células tronco do tecido adiposo humano (CTTAH) em gel de ácido hialurônico (AH), injetados no tecido subcutâneo de camundongos atímicos. MÉTODOS: Implantes controle - HA com meio de cultura foram injetados no tecido subcutâneo da região infraescapular esquerda de 12 camundongos atímicos. Implantes de CTTAH: HA com CTTAH suspensas em meio de cultura foi injetado no subcutâneo da região contra lateral, dos mesmos animais. Com oito semanas, os animais foram sacrificados e os implantes recuperados foram processados para extração de DNA genômico, estudo histológico por coloração por hematoxilina eosina e imnuoflurescência utilizando anticorpos anti vimentina humana e anti fator de von Willebrand. RESULTADOS: Controles - implantes não visualizados no local da injeção. Uma substância amorfa foi observada nos cortes corados por hematoxilina eosina. Vimentina humana e fator anti von Willebrand não foram identificados. DNA humano não foi detectado. Implantes de CTTAH - Uma massa era visível no local da injeção. Células fusiformes foram observadas nos corte corados com hematoxilina eosina. Tanto vimentina humana quanto fator de von Willebrand foram identificados pela imunofluorescência. A presença de DNA humano foi confirmada. CONCLUSÃO: O implante de células tronco do tecido adiposo humano em veículo de ácido hialurônico gel assegurou a manutenção das células no local do implante.


Subject(s)
Adult , Animals , Female , Humans , Mice , Adipocytes/transplantation , Adipose Tissue/cytology , Hyaluronic Acid/administration & dosage , Stem Cell Transplantation/methods , Adipocytes/cytology , Adipocytes/drug effects , Cells, Cultured , Cell Proliferation/drug effects , Fluorescent Antibody Technique , Implants, Experimental , Injections, Subcutaneous/methods , Mice, Nude , Models, Animal , Tissue Engineering/methods , Vimentin/analysis , von Willebrand Factor/analysis , von Willebrand Factor/antagonists & inhibitors
2.
Rev. chil. cienc. méd. biol ; 1(1): 39-42, 1991.
Article in Spanish | LILACS | ID: lil-148288

ABSTRACT

Se produjeron y caracterizaron 11 anticuerpos monoclonales de hibridomas murinos anti factor von Willebrand humano. Todos mostraron afinidad específica por el factor von Willebrand humano y pertenecen a los isotipos IgG1, IgG2a e IgG2b. Se estudió el efecto de los anticuerpos sobre la actividad Cofactor Ristocetina, encontrándose que 4 de ellos produjeron inhibición parcial


Subject(s)
Humans , Antibodies, Monoclonal/analysis , von Willebrand Factor/immunology , Enzyme-Linked Immunosorbent Assay , Interleukin-6/immunology , Ristocetin/immunology , von Willebrand Factor/antagonists & inhibitors , von Willebrand Factor/pharmacokinetics
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