Graft Viability
Graft Viability - Related Videos
12:03
Viability Assays for Cells in Culture
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Cited by 39 •
2014
Therapeutic compounds are often first examined in vitro with viability assays. Blind cell counts by a human observer can be highly sensitive to small changes in cell number but do not assess function. Computerized viability assays, as described here, can assess both structure and function in an objective manner.
05:47
Counting and Determining the Viability of Cultured Cells
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Cited by 19 •
2008
Determining the number of cells in culture is important in standardization of culture conditions and in performing accurate quantitation experiments. In this video, we demonstrate how cells are counted using a hemacytometer.
09:30
Tissue Characterization after a New Disaggregation Method for Skin Micro-Grafts Generation
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Cited by 44 •
2016
The protocol describes a new method to disaggregate human tissues and to create autologous micro-grafts that, combined with collagen sponges, give rise to human bio-complexes ready to use in the treatment of skin lesions. Further, this system preserves cell viability of micro-grafts at different times after mechanical disaggregation.
07:37
Mouse Models for Graft Arteriosclerosis
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Cited by 17 •
2013
We describe protocols for our mouse graft arteriosclerois (GA) models which involve interposition of a mouse vessel segment into a recipient of the same inbred strain. By backcrossing additional genetic changes into the vessel donor, the model can assess the effect of specific genes on GA.
02:38
Fluorescence-Based Viability Assessment of Oral Anaerobic Bacteria
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2026
Source: Calatayud Arroyo, M., et al. Assessing the Viability of a Synthetic Bacterial Consortium on the In Vitro Gut Host-microbe Interface. J. Vis. Exp. (2018)The video demonstrates a method to evaluate the viability of anaerobic oral bacteria using fluorescent dyes and flow cytometry. It begins with culturing bacteria in oxygen-free broth, followed by resuspending a single colony from a blood agar plate. After incubation and dilution, the culture is stained with membrane-permeable and...
FAQs
After transplantation, survival depends on several linked events rather than a single property. Cells must withstand the initial stress of transfer, receive oxygen and nutrients, establish or reconnect with blood vessels, and maintain suitable contact with host tissue. At the same time, immune and other stress responses must remain controlled enough to avoid damaging the graft.
Insufficient delivery can compromise cellular survival before the graft becomes vascularized. Adequate supply supports living cells while vascular connections are restored or formed, whereas limited access can weaken function and integration. For this reason, researchers consider blood-supply development alongside tissue contact and host responses when judging whether a transplant is likely to remain functional.
Host compatibility affects whether transplanted tissue can remain integrated rather than being harmed by an adverse biological response. Inflammation is important because an uncontrolled response can damage cells and interfere with healing, while stress responses may also reduce survival. Evaluating these influences helps distinguish poor graft performance caused by biological incompatibility from problems involving supply or preparation.
Assessment should consider more than whether tissue is still present. Researchers can examine evidence of cellular survival, restoration of blood supply through vascularization, continued tissue contact with the host, and preservation of function. Interpreting these features together provides a broader picture of acceptance, healing, and integration than relying on a single observation.
Preparation influences the condition in which tissue enters the host, while suitable contact supports integration during healing. If either is unfavorable, the graft may have greater difficulty receiving nutrients, establishing vascularization, or remaining connected to surrounding tissue. These factors therefore belong in both experimental design and interpretation when comparing graft outcomes.
It is a central outcome in tissue transplantation, reconstructive biology, and regenerative medicine because these fields must determine whether transplanted tissue survives, integrates, and performs its intended role. Viability assessment also links cellular events with whole-graft outcomes, allowing researchers to evaluate acceptance, healing, and longer-term function across different transplantation contexts.