Results: 13

Lentivirus vectors fail to deliver transgenes into bovine zygotes after co-incubation with sperm during in vitro fertilization

As vantagens dos animais transgênicos têm sido demonstradas em diferentes aplicações, entretanto muitas metodologias usadas para gerar animais geneticamente modificados (GM) apresentam baixas taxas de eficiência. O objetivo deste estudo foi avaliar a entrega dos vetores lentivirais (VLs) em zigotos ...

Mvda is required for zebrafish early development

Biol. Res; 54 (), 2021
BACKGROUND: The MVD gene mutations are identified in porokeratosis, which is considered a skin-specific autoin- flammatory keratinization disease. However, the biological function of MVD gene remains largely unknown. Therefore, we analyzed the function of mvda gene, orthologous to the human MVD gene, in ...

A double fluorescence chimeric limb regeneration model reveals muscle fiber reconnection during axolotl limb regeneration

Int. j. morphol; 38 (5), 2020
SUMMARY: Axolotl limb regeneration is a fascinating characteristic that has attracted attention for several decades. Our previous studies on axolotl limb regeneration indicated that the satellite cells in the remnant muscles move distally into the blastema to regenerate new muscles that are separated by ...

Animal models of human atherosclerosis: current progress

Braz. j. med. biol. res; 53 (6), 2020
Atherosclerosis retains the leading position among the causes of global morbidity and mortality worldwide, especially in the industrialized countries. Despite the continuing efforts to investigate disease pathogenesis and find the potential points of effective therapeutic intervention, our understanding ...

An update on the tools for creating transgenic animal models of human diseases - focus on atherosclerosis

Braz. j. med. biol. res; 52 (5), 2019
Animal models of diseases are invaluable tools of modern medicine. More than forty years have passed since the first successful experiments and the spectrum of available models, as well as the list of methods for creating them, have expanded dramatically. The major step forward in creating specific disea...

Animal models for colorectal cancer

ABCD (São Paulo, Impr.); 31 (2), 2018
ABSTRACT Introduction: Colorectal cancer is a very frequent sort of neoplasm among the population, with a high mortality rate. It develops from an association of genetic and environmental factors, and it is related to multiple cell signaling pathways. Cell cultures and animal models are used in research...

Genetic variants associated with neurodegenerative Alzheimer disease in natural models

Biol. Res; 49 (), 2016
The use of transgenic models for the study of neurodegenerative diseases has made valuable contributions to the field. However, some important limitations, including protein overexpression and general systemic compensation for the missing genes, has caused researchers to seek natural models that show the...

"progreso" biotccnológico y pobreza: una reflexión ética

Pers. bioet; 15 (2), 2011
Nuestra cultura asocia progreso con desarrollo científico y, sobre todo, con desarrollo tecnológico. En el contexto latinoamericano, esta asociación no es tan definitiva como parece serlo para los países "desarrollados". Cuando se quiere integrar a la realidad latinoamericana la ecuación progreso-bi...

Improving the production of transgenic fish germlines: in vivo evaluation of mosaicism in zebrafish (Danio rerio) using a green fluorescent protein (GFP) and growth hormone cDNA transgene co-injection strategy

Genet. mol. biol; 30 (1), 2007
In fish, microinjection is the method most frequently used for gene transfer. However, due to delayed transgene integration this technique almost invariably produces mosaic individuals and if the gene is not integrated into germ cells its transmission to descendants is difficult or impossible. We evaluat...