Graft Biopsy
Graft Biopsy - Related Videos
05:00
Using a Chemical Biopsy for Graft Quality Assessment
0 Views •
Cited by 11 •
2020
The protocol presents utilization of the chemical biopsy approach followed by comprehensive metabolomic and lipidomic analysis for quality assessment of kidney grafts allocated for transplantation.
09:30
Tissue Characterization after a New Disaggregation Method for Skin Micro-Grafts Generation
0 Views •
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
0 Views •
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.
02:47
In Vitro Parallel-Plate Flow Model to Study Bacterial Adhesion on a Tissue Biopsy
0 Views •
2026
Source: Ditkowski, B., et al. An In Vitro Model of a Parallel-Plate Perfusion System to Study Bacterial Adherence to Graft Tissues. J. Vis. Exp. (2019).This video demonstrates the method of using a parallel-plate flow chamber to perfuse fluorescently labeled bacteria over vascular graft tissues, enabling controlled analysis of bacterial adhesion and early pathogenesis under shear flow conditions.
03:35
A Technique for Human Skin Grafting in a Mouse Model
0 Views •
2025
This video demonstrates a method for grafting human skin onto an immunodeficient mouse with a suppressed neutrophil response. The method involves applying human split-thickness skin to the mouse's graft bed, sealing it, and covering it for recovery. Eventually, the human skin adheres to the mouse's skin, establishing vascularization and circulation, resulting in a successful skin xenograft.
FAQs
A graft biopsy provides direct evidence of structural changes within transplanted tissue, complementing functional assessment and clinical findings. Microscopic examination can reveal cellular injury, inflammation, rejection, infection, or drug-related toxicity. This tissue-level information is especially valuable when symptoms and blood-test results do not clearly identify why the graft is performing poorly.
Histopathology examines the graft’s tissue architecture and cellular changes, while immunostaining adds laboratory evidence that can help characterize particular injury patterns. Together, these methods support recognition of inflammation, immune-mediated rejection, infection, and medication-related toxicity. Their combined findings give clinicians a more specific basis for interpreting graft damage than functional measurements alone.
These causes can all be associated with graft injury, but they represent different explanations for dysfunction and therefore require different clinical interpretations. Graft biopsy helps separate rejection, infection, and drug-related toxicity by identifying their tissue effects. Establishing the most likely cause allows clinicians to use the biopsy result when selecting and adjusting treatment.
The findings are most valuable when a transplanted organ or tissue shows possible dysfunction but clinical signs and blood tests remain inconclusive. In that setting, tissue examination can clarify whether the problem reflects rejection, infection, cellular injury, or drug toxicity. Biopsy results therefore add diagnostic evidence that routine monitoring may not provide.
Clinicians obtain a small sample from the transplanted organ or tissue through either a needle-based or surgical technique. The specimen is then evaluated with histopathology, immunostaining, or other laboratory methods. This workflow connects tissue collection with microscopic and laboratory analysis, allowing structural and cellular abnormalities to be assessed in the graft.
Clinicians use the results to investigate suspected graft dysfunction, support ongoing monitoring, and guide treatment decisions. Because the sample can show rejection, infection, inflammation, cellular injury, or drug-related toxicity, its findings help focus management on the most relevant cause. Repeated interpretation within transplant care can also contribute to understanding long-term graft survival.