2 research outputs found
In silico performance analysis of web tools for CRISPRa sgRNA design in human genes
Angiogenic gene overexpression has been the main strategy in numerous vascular regenerative gene therapy projects. However, most have failed in clinical trials. CRISPRa technology enhances gene overexpression levels based on the identification of sgRNAs with maximum efficiency and safety. CRISPick and CHOP CHOP are the most widely used web tools for the prediction of sgRNAs. The objective of our study was to analyze the performance of both platforms for the sgRNA design to angiogenic genes (VEGFA, KDR, EPO, HIF-1A, HGF, FGF, PGF, FGF1) involving different human reference genomes (GRCH 37 and GRCH 38). The top 20 ranked sgRNAs proposed by the two tools were analyzed in different aspects. No significant differences were found on the DNA curvature associated with the sgRNA binding sites but the sgRNA predicted on-target efficiency was significantly greater when CRISPick was used. Moreover, the mean ranking variation was greater for the same platform in EPO, EGF, HIF-1A, PGF and HGF, whereas it did not reach statistical significance in KDR, FGF-1 and VEGFA. The rearrangement analysis of the ranking positions was also different between platforms. CRISPick proved to be more accurate in establishing the best sgRNAs in relation to a more complete genome, whereas CHOP CHOP showed a narrower classification reordering.Fil: Nuñez Pedrozo, Cristian Nahuel. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Peralta, Tomás M.. Universidad Favaloro; ArgentinaFil: Olea, Fernanda Daniela. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Locatelli, Paola. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Crottogini, Alberto Jose. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Belaich, Mariano Nicolas. Universidad Nacional de Quilmes; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Cuniberti, Luis Alberto. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; Argentin
Effect of intramuscular baculovirus encoding mutant hypoxia-inducible factor 1-alpha on neovasculogenesis and ischemic muscle protection in rabbits with peripheral arterial disease
Background aims: Peripheral arterial disease (PAD) is a progressive, disabling ailment for which no effective treatment exists. Gene therapy-mediated neovascularization has emerged as a potentially useful strategy. We tested the angiogenic and arteriogenic efficacy and safety of a baculovirus (BV) encoding mutant, oxygen-resistant hypoxia-inducible factor 1-alpha (mHIF-1α), in rabbits with PAD. Methods: After assessing the transfection efficiency of the BV.mHIF-1α vector and its tubulogenesis potential in vitro, we randomized rabbits with experimental PAD to receive 1 × 109 copies of BV.mHIF-1α or BV.null (n = 6 per group) 7 days after surgery. Two weeks post-treatment, collateralization (digital angiography) and capillary and arteriolar densities (immunohistochemistry) were measured in the posterior limbs. Ischemic damage was evaluated in adductor and gastrocnemius muscle samples. Tracking of viral DNA in injected zones and remote tissues at different time points was performed in additional rabbits using a BV encoding GFP. Results: Angiographically visible collaterals were more numerous in BV.mHIF-1α-treated rabbits (8.12 ± 0.42 vs 6.13 ± 1.15 collaterals/cm2, P < 0.05). The same occurred with arteriolar (27.9 ± 7.0 vs 15.3 ± 4.0 arterioles/mm2) and capillary (341.8 ± 109.9 vs 208.8 ± 87.7 capillaries/mm2, P < 0.05) densities. BV.mHIF-1α-treated rabbits displayed less ischemic muscle damage than BV.null-treated animals. Viral DNA and GFP mRNA were detectable only at 3 and 7 days after injection in hind limbs. Neither the virus nor GFP mRNA was detected in remote tissues. Conclusions: In rabbits with PAD, BV.mHIF-1α induced neovascularization and reduced ischemic damage, exhibiting a good safety profile at 14 days post-treatment. Complementary studies to evaluate its potential usefulness in the clinic are needed.Fil: Giménez, Carlos Sebastián. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Castillo Velasquez, Martha Giovanna. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Simonin, Jorge Alejandro. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y TecnologÃa. Laboratorio de IngenierÃa Genética y BiologÃa Molecular y Celular; ArgentinaFil: Nuñez Pedrozo, Cristian Nahuel. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Pascuali, Natalia Marisa. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Instituto de BiologÃa y Medicina Experimental. Fundación de Instituto de BiologÃa y Medicina Experimental. Instituto de BiologÃa y Medicina Experimental; ArgentinaFil: Bauza, Maria del Rosario. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Locatelli, Paola. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: López, Ayelén Emilce. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Belaich, Mariano Nicolas. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y TecnologÃa. Laboratorio de IngenierÃa Genética y BiologÃa Molecular y Celular; ArgentinaFil: Mendiz, Alfredo O.. Universidad Favaloro; ArgentinaFil: Crottogini, Alberto José. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Cuniberti, Luis Alberto. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; ArgentinaFil: Olea, Fernanda Daniela. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa. Fundación Favaloro. Instituto de Medicina Traslacional, Trasplante y BioingenierÃa; Argentin