Blastocysts Derived From 0PN Oocytes: Genetic And Clinical Results.

OBJECTIVE: To analyze the genetic and clinical outcomes of blastocysts derived from 0PN oocytes after IVF/ICSI. METHODS: This retrospective observational study included patients aged 40 years or younger submitted to IVF/ICSI with their own oocytes and with blastocysts derived from 0PN oocytes between January 2015 and April 2018. The clinical outcomes of 0PN blastocyst transfers were analyzed. Genetic tests were performed on biopsied 0PN blastocysts with Next Generation Sequencing. RESULTS: A total of 27 0PN blastocysts were transferred, yielding an implantation rate of 48.0% and an ongoing pregnancy rate of 50.0%. The transfers resulted in 13 live births (59.0% live birth rate). Genetic test results revealed that four of the 17 0PN blastocysts biopsied were 46XX; three were 46XY; and 10 were aneuploid embryos, awarding a diploid rate to 76.4% (13/17). CONCLUSION: Almost half of the 0PN blastocysts implanted (48.0%) and 13 healthy babies were born. More than three quarters (76.4%) of the 0PN blastocysts were diploid, thus ruling out the possibility of parthenogenetic activation. Our study indicated that the transfer of 0PN blastocysts is a safe, worthy option when the number of normal 2PN embryos is insufficient.

Living donor bone banking: processing and discarding--from procurement to therapeutic use.

Skeletal muscle and osteoarticular tissue banks are responsible to procure, process, store and distribute tissues, from living and cadaveric donors. The procedures involve the application of protocols covering all aspects of the banking, ensuring the best tissue quality and maximum safety for the recipient. An analysis on the causes of bone tissue discarded by Biotar Tissue Bank between January 2005 and December 2012 was carried. Bone tissue was obtained from both hip and knee replacement (femoral heads and tibial plateau respectively) in living donors treated at different medical-surgical institutions in Argentina. These tissues were processed at the Bank to produce both frozen and lyophilized cancellous bone. Out of 3413 donated bones received by the Bank, 77.55 % resulted in final product, while the remaining 22.44 % was discarded in compliance with the quality standards of both the Bank and the regulatory authority. Comparing the last and the first year of the studied period, the number of discarded tissue increased 3.6 times, while the number of collected bones was approximately 10 times higher. Related to total disposed tissue, reactive serology was the most frequent cause (62.14 %), followed by inappropriate collection/storage of blood sample (30.81 %). A progressive reduction in the percentages of total discard was observed, and this was proportional to inappropriate collection/storage of blood sample. No significant differences were found in the discard rates due to positive serology throughout all the years studied. The success of a tissue bank requires full commitment of all the personnel especially the team members responsible for donor selection and the processing of allografts. It is important to critically screen donors in the early stages of donor recruitment. All of the procedures carried out by the tissue bank are parts of the quality control system which must be strictly carried out. Biotar Tissue Bank is continuously committed to ensure safety to the recipients.

Cultivo de condrocitos sobre una matriz acelular derivada de membrana amniocoriónica / Culture of chondrocytes on an acellular matrix derived from amniochorionic membrane

Introducción: El tejido cartilaginoso articular presenta escasa capacidad regenerativa. Existe alta incidencia de lesiones condrales en la rodilla, especialmente de grado II/III (Outerbridge). El uso combinado de células autólogas cultivadas con membranas biológicas es una posibilidad terapéutica. El objetivo del presente trabajo es analizar las características del desarrollo in vitro de condrocitos humanos sobre una membrana amniocoriónica acelular (MAC) desecada. Materiales y métodos: Entre diciembre de 2010 y diciembre de 2011 se procesaron 16 muestras de cartílago de donante vivo, de las cuales se analizaron siete. Los condrocitos fueron cultivados y amplificados sobre plástico, a partir de lo cual se realizaron los siguientes análisis: interacción entre células y MAC, capacidad de la MAC como matriz para las células y comportamiento de las células cultivadas sobre la MAC. Resultados: Los condrocitos in vitro mostraron cambios fenotípicos en presencia de MAC. Las células fueron capaces de adherirse y permanecer en la región esponjosa de la membrana. La microscopia electrónica de las MAC cultivadas mostró la presencia de células, organelas celulares bien conservadas, retículo endoplásmico y uniones de tipo desmosoma. Conclusiones: Este trabajo muestra la factibilidad de cultivar condrocitos sobre MAC. Las células fueron capaces de adherirse, permanecer y diferenciarse sobre la membrana durante el tiempo del estudio (AU)

Cultivo de condrocitos sobre una matriz acelular derivada de membrana amniocoriónica / Culture of chondrocytes on an acellular matrix derived from amniochorionic membrane

Introducción: El tejido cartilaginoso articular presenta escasa capacidad regenerativa. Existe alta incidencia de lesiones condrales en la rodilla, especialmente de grado II/III (Outerbridge). El uso combinado de células autólogas cultivadas con membranas biológicas es una posibilidad terapéutica. El objetivo del presente trabajo es analizar las características del desarrollo in vitro de condrocitos humanos sobre una membrana amniocoriónica acelular (MAC) desecada. Materiales y métodos: Entre diciembre de 2010 y diciembre de 2011 se procesaron 16 muestras de cartílago de donante vivo, de las cuales se analizaron siete. Los condrocitos fueron cultivados y amplificados sobre plástico, a partir de lo cual se realizaron los siguientes análisis: interacción entre células y MAC, capacidad de la MAC como matriz para las células y comportamiento de las células cultivadas sobre la MAC. Resultados: Los condrocitos in vitro mostraron cambios fenotípicos en presencia de MAC. Las células fueron capaces de adherirse y permanecer en la región esponjosa de la membrana. La microscopia electrónica de las MAC cultivadas mostró la presencia de células, organelas celulares bien conservadas, retículo endoplásmico y uniones de tipo desmosoma. Conclusiones: Este trabajo muestra la factibilidad de cultivar condrocitos sobre MAC. Las células fueron capaces de adherirse, permanecer y diferenciarse sobre la membrana durante el tiempo del estudio