El entender y aplicar adecuadamente la criopreservación de material biológico es fundamental en laboratorios y bancos de células. Sin embargo aunque se han implementado protocolos para criopreservación, aún no se tienen los ideales en la mayoría de los casos.El objetivo de esta revisión es dar a conocer ciertos parámetros inherentes al proceso de criopreservación y la importancia de conocer ciertas características de la célula que pueden incidir con la viabilidad del producto congelado para lograr la técnica adecuada. Para alcanzar este propósito, el documento se basará en el conocimiento de las propiedades fisicoquímicas de la célula y/o el tejido, pues este proceso es afectado por diferentes variables como permeabilidad celular, volumen osmóticamente inactivo y relación superficie/área de la célula, la cual es variable de acuerdo a la especie, tipo y estadio de la célula a congelar. La estructura y composición de las membranas plasmáticas determinan los principales eventos celulares que tienen lugar durante los procesos de criopreservación; las bajas temperaturas afectan la difusión y ósmosis a través de las membranas y cada célula maneja su propio perfil biofísico el cual interactúa con diferentes criopreservantes celulares. El hallar el protocolo adecuado será lo que garantice la viabilidad y funcionabilidad celular.

This article presents the case of a newly born female patient with a cleft of the primary palate (alveolar cleft), with an in utero diagnosis of the described cleft, from whom umbilical cord stem cells are obtained and cryopreserved. The patient is managed with nasoalveolar molding, and at 5 months of age, she is taken to surgery for cheiloplasty and gingivoperiostioplasty with umbilical cord stem cells. A radiographic and CT follow-up is carried out on the described cleft.

Biosimilars of granulocyte colony-stimulating factor (G-CSF) have been routinely introduced into clinical practice. However, not functional genomics characterization has been performed yet in comparison with the innovator G-CSF. This study aimed to evaluate the transcriptomic changes in an in vitro model of umbilical cord blood cells (UBC) exposed to G-CSF for the identification of their modulated pathways. Umbilical cord blood cells–derived mononuclear cells (MNCs) were treated with biosimilar and innovator G-CSF for further gene expression profiling analysis using a microarray-based platform. Comparative analysis of biosimilar and innovator G-CSF gene expression signatures allowed us to identify the most commonly modulated pathways by both drugs. In brief, we observed predominantly upmodulation of transcripts related to PI3K-Akt, NF-kappaB, and tumor necrosis factor (TNF) signaling pathways as well as transcripts related to negative regulation of apoptotic process among others. In addition, hematopoietic colony-forming cell assays corroborate the G-CSF phenotypic effects over UBC-derived MNCs. In conclusion, our study suggests that G-CSF impacts UBC-derived cells through the modulation of several signaling pathways associated with cell survival, migration, and proliferation. The concordance observed between biosimilar and innovator G-CSF emphasizes their similarity in regards to their specificity and biological responses.