Human Umbilical cord-derived Endothelial cellsThe Human Umbilical cord-derived Endothelial cells: what quality control parameters should one look for?

The standardization of umbilical cord-derived endothelial cells depends on developing general guidelines for their production and quality assurance. The collection, culture, and proliferation of umbilical cord MSCs, management for cell preservation, transport, and associated safeguard measures, standardization of a clean environment, routine maintenance, and associated tests and examinations, among other things, are all in accordance with these guidelines.

Standardized management and instruction for operators

Basic standardized training programmes cover developing knowledge, developing skills, and being familiar with relevant laws and regulations. Centralized instruction, workshops, small seminars or symposiums, and other approaches are used for training. Learning professional information, cell culture techniques, and umbilical cord MSC quality control procedures are among the training’s goals. Filling up and organizing original work records and data, adhering to current GMPs and SOPs for laboratory maintenance, and finishing operating records are all components of a standardized management system.

Uniform use and control of resources and equipment

The management of cell culture labs must be delegated to a specific individual who is also in charge of staff training, frequent calibration, and equipment upkeep. The designated person is responsible for establishing and managing the equipment quality certification file records in addition to maintaining the clean rooms’ regular operational status.

• CO2 incubator: Maintain a constant temperature of 37 °C and a 5% CO2 content.
• Before using a centrifuge, make sure the spinning item is balanced.
• Water bath box: You should replace and sanitize the distilled water at least once every month.
• Inverted microscope: When using an oil mirror, the lens needs to be cleaned. After each use, the microscope should be covered and turned off.
• Biological safety cabinets or exceptionally clean work surfaces: Operation instructions should be rigorously followed.

The designated person should check that all instruments are functioning properly after completing each programme or procedure. When an item is not in use, the power should be turned off. Equipment usage records need to be timely updated.

Cell Quality Control

Before using cell-based products in any clinical transplant treatment, they must be thoroughly examined. The double quality review and testing are the responsibility of the laboratory staff, and they must sign a standardized form verifying the successful completion of all tests.

Quality control has always been and will always be the cornerstone of effective cell culture techniques. It reduces experiment-to-experiment variation and improves the reliability of the output. Important components of QC that should be periodically carried out include cell line verification and identification, contaminant screening, optimal cell culture procedures, storage, and using standardized reagents.

Quality Control of Endothelial Cells

Each batch of endothelial cells is examined for morphology, cell growth, cell adherence rate, von Willebrand factor (vWF) and CD31 flow cytometric analysis for cell-type specific markers, and Dil-Ac-LDL uptake. By successive passages up to 15 population doublings (PD), growth performance is assessed in culture conditions free of antibiotics and antimycotics. Additionally, all cells have been evaluated for the absence of microbiological pathogens (fungi, bacteria, and mycoplasma) like HIV, HBV etc.

Endothelial cells from embryos differ greatly between organs. Endothelial cell differentiation is influenced by a number of variables, such as the local microenvironment, connections with neighbouring cells, and the regional release of growth factors and cytokines. In response to IL-1, TNF, VEGF, and FGF, adult endothelial cells have been shown to undergo significant plasticity and reprogramming.

Many methods for performing quality control are well-established, but as was discussed above, there have been some recent developments. These include quick in-lab testing kits for mycoplasma and STR typing, software to track stored cell lines and samples, and accessible -omics screening tools to enable deeper analysis of cells over time or in response to novel reagents. These novel methods may make it easier to integrate quality control (QC) into routine laboratory procedures or allow for more precise cell quality inspections.