From:  Essential molecular biology methods in biomaterials research: a guide for emerging investigators

 Applications of in situ hybridization (ISH) in biomaterials

ApplicationType of biomaterial or systemPurpose of ISHBenefitsLimitationsRef.
Evaluation of osteoblasts at the bone–biomaterial interfaceβ-tricalcium phosphate hybridized with procollagenAssess the temporal expression of osteogenic genes during new bone formationHigh spatial and temporal resolution detects gene activity associated with bone remodelingRNA degradation due to decalcification; no signal at early stages[40]
Quantification of mRNA expression in cancer tissue samplesFormalin-fixed, paraffin-embedded (FFPE) clinical samplesQuantitative detection of nucleic acid biomarkersHigh signal-to-noise ratio; suitable for diagnostic pathology; works with FFPE tissues; cost-effective and sensitiveComplex procedures, possible uncertainty in results; image quality can be compromised in conventional single-molecule FISH (smFISH)[41]
Non-invasive detection of endometrial cancer (EC)Vaginal swabs from patients with suspected ECIdentification of genomic imbalances in exfoliated tumor cellsNon-invasive; high sensitivity and negative predictive valueRequires validation; false positives are possible; relies on the quality of brushing and cell preservation[42]