ABSTRACT
Soro fetal bovino (SFB) e albumina sérica bovina (BSA) são componentes importantes do cultivo in vitro (CIV) de embriões bovinos, porém são frequentemente associados ao acúmulo excessivo de lipídios, podendo prejudicar o desenvolvimento embrionário. Este estudo teve como objetivo substituir parcialmente o SFB por BSA V FAF durante o CIV de embriões bovinos, avaliar a produção embrionária e quantificar os lipídios dos embriões, SFB e dos meios de cultivo. Para isto, os embriões desenvolveram em meios de cultivo suplementados com 10% de SFB (SFB10%) ou 5% de SFB e 0.03g de BSA V FAF (SFB5%/BSA). O conteúdo lipídico foi avaliado por UHPLC-MS/MS. A análise estatística foi feita utilizando teste t e ANOVA. A substituição parcial de SFB por BSA V FAF não alterou a produção embrionária. Nos dois grupos foram identificados 10 fosfolipídios e três deles, DOPC (p=0,037), POPG (p=0,046) e C24: 1-SM (p=0,009), apresentaram menores concentrações no meio SFB5%/BSA. Os fosfolipídios identificados nos embriões coincidem com os encontrados no SFB e meios de cultivo e quatro deles DOPC (p=0,013), DPPC (p=0,004), POPG (p=0,05) e C24:1-SM (p=0,003) diminuíram a concentração com a redução do SFB. A substituição parcial do SFB diminui a concentração de fosfolipídios sem prejudicar a produção embrionária, sugerindo uma melhora nas técnicas relacionadas ao cultivo in vitro.(AU)
Fetal bovine serum (FBS) and bovine serum albumin (BSA) are important components during bovine embryo in vitro culture (IVC), but they are associated with excess of embryonic lipid, which might impair embryo development. This study aimed to partially replace FBS by BSA V FAF during bovine IVC, evaluate embryo production and quantify the phospholipid content in produced embryos, SFB and IVC medium. The embryos were in vitro cultured in medium supplied with 10% of FBS (FBS10%) or with 5% of FBS plus 0.03 g BSA V FAF (FBS5%/BSA). The lipid content was evaluated using UHPLC-MS/MS and statistical analysis was performed using t-test and ANOVA. The partial replacement of FBS by BSA V FAF did not alter embryo production. Ten phospholipids were identified in both groups and three of them, DOPC (p=0.037), POPG (p=0.046) and C24: 1-SM (p=0.009) presented lower concentration in FBS5%/BSA culture medium. The phospholipids identified on embryos matches with those found on SFB and culture medium and four of them DOPC (p=0.013), DPPC (p=0.004), POPG (p=0.05) and C24:1- SM (p=0.003) reduced its concentration when FBS was reduced. Theses founds shown that the FBS partial replacement reduces phospholipids content in embryos but do not decrease embryo production, suggesting a technical improvement.(AU)
Subject(s)
Animals , Cattle , Embryo, Mammalian/chemistry , Embryo, Mammalian/cytology , Cattle/embryology , Serum Albumin, Bovine/analysis , Membrane Lipids/administration & dosage , Membrane Lipids/analysis , In Vitro TechniquesABSTRACT
Soro fetal bovino (SFB) e albumina sérica bovina (BSA) são componentes importantes do cultivo in vitro (CIV) de embriões bovinos, porém são frequentemente associados ao acúmulo excessivo de lipídios, podendo prejudicar o desenvolvimento embrionário. Este estudo teve como objetivo substituir parcialmente o SFB por BSA V FAF durante o CIV de embriões bovinos, avaliar a produção embrionária e quantificar os lipídios dos embriões, SFB e dos meios de cultivo. Para isto, os embriões desenvolveram em meios de cultivo suplementados com 10% de SFB (SFB10%) ou 5% de SFB e 0.03g de BSA V FAF (SFB5%/BSA). O conteúdo lipídico foi avaliado por UHPLC-MS/MS. A análise estatística foi feita utilizando teste t e ANOVA. A substituição parcial de SFB por BSA V FAF não alterou a produção embrionária. Nos dois grupos foram identificados 10 fosfolipídios e três deles, DOPC (p=0,037), POPG (p=0,046) e C24: 1-SM (p=0,009), apresentaram menores concentrações no meio SFB5%/BSA. Os fosfolipídios identificados nos embriões coincidem com os encontrados no SFB e meios de cultivo e quatro deles DOPC (p=0,013), DPPC (p=0,004), POPG (p=0,05) e C24:1-SM (p=0,003) diminuíram a concentração com a redução do SFB. A substituição parcial do SFB diminui a concentração de fosfolipídios sem prejudicar a produção embrionária, sugerindo uma melhora nas técnicas relacionadas ao cultivo in vitro.
Fetal bovine serum (FBS) and bovine serum albumin (BSA) are important components during bovine embryo in vitro culture (IVC), but they are associated with excess of embryonic lipid, which might impair embryo development. This study aimed to partially replace FBS by BSA V FAF during bovine IVC, evaluate embryo production and quantify the phospholipid content in produced embryos, SFB and IVC medium. The embryos were in vitro cultured in medium supplied with 10% of FBS (FBS10%) or with 5% of FBS plus 0.03 g BSA V FAF (FBS5%/BSA). The lipid content was evaluated using UHPLC-MS/MS and statistical analysis was performed using t-test and ANOVA. The partial replacement of FBS by BSA V FAF did not alter embryo production. Ten phospholipids were identified in both groups and three of them, DOPC (p=0.037), POPG (p=0.046) and C24: 1-SM (p=0.009) presented lower concentration in FBS5%/BSA culture medium. The phospholipids identified on embryos matches with those found on SFB and culture medium and four of them DOPC (p=0.013), DPPC (p=0.004), POPG (p=0.05) and C24:1- SM (p=0.003) reduced its concentration when FBS was reduced. Theses founds shown that the FBS partial replacement reduces phospholipids content in embryos but do not decrease embryo production, suggesting a technical improvement.
Subject(s)
Animals , Cattle , Cattle/embryology , Embryo, Mammalian/cytology , Embryo, Mammalian/chemistry , Membrane Lipids/administration & dosage , Membrane Lipids/analysis , Serum Albumin, Bovine/analysis , In Vitro TechniquesABSTRACT
Archaeosomes (ARC), vesicles made from lipids extracted from Archaea, display strong adjuvant properties. In this study, we evaluated the ability of the highly stable ARC formulated from total polar lipids of a new Halorubrum tebenquichense strain found in Argentinean Patagonia, to act as adjuvant for soluble parasite antigens in developing prophylactic vaccine against the intracellular protozoan T. cruzi, the etiologic agent of Chagas disease. We demonstrated for the first time that C3H/HeN mice subcutaneously immunized with trypanosomal antigens entrapped in these ARC (ARC-TcAg) rapidly developed higher levels of circulating T. cruzi antibodies than those measured in the sera from animals receiving the antigen alone. Enhanced humoral responses elicited by ARC-TcAg presented a dominant IgG2a antibody isotype, usually associated with Th1-type immunity and resistance against T. cruzi. More importantly, ARC-TcAg-vaccinated mice displayed reduced parasitemia during early infection and were protected against an otherwise lethal challenge with the virulent Tulahuén strain of the parasite. Our findings suggest that, as an adjuvant, H. tebenquichense-derived ARC may hold great potential to develop a safe and helpful vaccine against this relevant human pathogen.