CRISPR/Cas9: reflexiones bioéticas sobre las modificacion es genómicas / CRISPR/Cas9: bioethical reflections on genome modifications

CRISPR/Cas9 puede ser considerado el descubrimiento biotecnológico del siglo. Sin embargo, las reflexiones sobre la aceptabilidad y factibilidad de producir cambios permanentes en el ADN de gametos y embriones, ha arrojado nueva luz sobre CRISPR. Por ejemplo al notar que las alteraciones en la línea germinal, pueden ser heredadas y por lo tanto observarse a lo largo de las generaciones. Aunque inicialmente estas transformaciones puedan ser deseables, más allá del impacto tecnológico, la tecnología CRISPR parece tener varias implicancias éticas para la sociedad. Estas pueden ser analizadas a partir de las distintas reacciones que ha despertado CRISPR en todo el mundo. Por ejemplo, en el pedido de suspensión total de la aplicación clínica (es decir, la prohibición de transferir en el útero un embrión previamente modificado con la tecnología CRISPR) hasta tanto no se hayan alcanzado y aprobado ciertos requisitos indispensables para la investigación clínica. En general, esta tecnología ha sido prematuramente caracterizada como "disruptiva". Este texto analizará las implicancias éticas, políticas, sociales, médicas y subjetivas a la luz del fenómeno social - no tecnológico - creado por CRISPR.

CRISPR/Cas9 can be considered the biotechnogical discovery of the century. However, reflections on the plausibility and feasibility of producing permanent changes in the DNA of gametes and embryos throw new light on CRISPR. As in modifications in the germinal line can be inherited and hence, observed throughout generations. While this might be desirable for some, besides the technological impact, CRISPR also seems to have an ethical impact on society. These ethical impacts can be observed in the diverse reactions to CRISPR from across the globe. For instance, a request for the complete suspension of clinical application (that is, the prohibition of implanting an embryo with CRISPR modifications in the uterus) till certain basic research requirements were met and approved. Broadly, this technology has been prematurely also characterized as "disruptive" by some. This paper will analyze these ethical, political, social, medical and subjective reactions in light of the social - not technological - phenomenon created by CRISPR.

Treatment with Ilex paraguariensis (yerba mate) aqueous solution prevents hepatic redox imbalance, elevated triglycerides, and microsteatosis in overweight adult rats that were precociously weaned

Early weaning (EW) leads to overweight, visceral obesity, hyperleptinemia, and insulin resistance in adulthood. Treatment with Ilex paraguariensis (yerba mate) improves obesity and insulin resistance in these animals. Here, we evaluated the effects of chronic treatment with yerba mate on the redox balance and liver morphology of overweight early-weaned rats. To induce EW, we wrapped the dams with bandages to interrupt milk access during the last 3 days of lactation. Control pups (C) had free access to maternal milk for the full 21 days of lactation. On postnatal day (PN) 150, EW offspring were subdivided into the EW+YM group, which received the aqueous extract of yerba mate (1 g/kg bw by gavage once a day for 30 days) and the EW group, which received water by gavage for the same period. All rats were euthanized on PN180. The EW group showed higher bound carbonyl (a marker of total protein oxidation), higher TBARS levels (a marker of lipid peroxidation), and lower superoxide dismutase (SOD) activity in liver tissue than the C group, as well as higher triglyceride content and microsteatosis. In plasma, the EW offspring showed higher TBARS levels. One month of yerba mate treatment normalized these parameters. Thus, we have shown evidence that yerba mate improved antioxidant defenses and mitigated liver dysfunction in overweight adult rats that were weaned prematurely.