2026.04.13
In the field of life science research and bioprocessing, the cryopreservation of primary cells has long been a key challenge. Human Umbilical Vein Endothelial Cells (HUVECs), as essential tools for vascular biology, angiogenesis, and drug safety research, require strict cryopreservation conditions to maintain their phenotypic and functional integrity across different passages. Traditional serum-containing freezing media often introduce zoonotic contamination risks and batch-to-batch variability, while inferior serum-free alternatives fail to guarantee stable post-thaw performance. Kryogene Cell Freezing Media - Serum Free (Cat. No. AR0018-100) addresses these pain points, as validated by rigorous in vitro tests shown in Fig 1.
Fig 1 depicts a comparative experiment where HUVECs at Passage 2 (P2), Passage 3 (P3), and Passage 4 (P4) were cryopreserved using Kryogene Serum-Free Cell Freezing Media and a competitive product, with post-thaw performance comprehensively evaluated. The data clearly demonstrates the superior efficacy of Kryogene’s solution in maintaining HUVECs’ viability and function.
Fig 1. Human umbilical vein endothelial cells (HUVECs) were cryopreserved at P2,P3 and P4 with Kryogene Cell Freezing Media - Serum Free and competitive product respectively, the efficacy of both media was evaluated by comparing the post-thaw performance of the preserved cells.
(A) Post-thaw cell viability at P2/P3/P4.
(B) Post-thaw cell recovery rate at P2.
(C) Cell population doubling time at P3 and P4.
(D) Post-thaw expression of endothelial cell surface markers (CD31, CD105) at P3.
(E) Post-thaw (48h, 72h) cell morphology at P3.
As shown in Fig 1A, Kryogene’s serum-free media maintained consistently high post-thaw cell viability across P2, P3, and P4, with no significant decline as passages increased—outperforming the competitor, which showed a notable drop in viability at P4. Fig 1B further confirms that the post-thaw cell recovery rate of HUVECs at P2 was significantly higher with Kryogene’s product, ensuring sufficient cell quantity for subsequent experiments. Importantly, Fig 1C reveals that HUVECs cryopreserved with Kryogene media had a stable cell population doubling time at P3 and P4, indicating unimpaired proliferation capacity post-thaw—a critical factor for long-term cell culture and experimental reproducibility.
Cell surface marker expression is a key indicator of HUVECs’ phenotypic integrity. Fig 1D shows that Kryogene’s serum-free media effectively preserved the expression of CD31 and CD105, two core endothelial cell markers, post-thaw at P3, while the competitor’s media led to reduced marker expression. Additionally, Fig 1E illustrates that HUVECs maintained normal morphology 48h and 72h post-thaw when using Kryogene’s product, with intact cell junctions and typical endothelial cell morphology, whereas the competitor’s group showed irregular cell shapes and reduced confluency.
Manufactured under cGMP standards with USP-compliant raw materials, Kryogene Cell Freezing Media - Serum Free is a pre-formulated, ready-to-use solution free of serum and animal components, eliminating contamination risks and ensuring batch-to-batch consistency. For researchers relying on HUVECs for vascular research, this product delivers reliable, reproducible cryopreservation results, streamlining workflows and safeguarding experimental validity. Choose Kryogene to protect the vitality of your primary cells and elevate your research standards.
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