ArticleJournal of clinical pathology2025
Single-molecule localisation microscopy (SMLM) is feasible in human and animal formalin fixed paraffin embedded (FFPE) tissues in medical renal disease.
Article in Journal of clinical pathology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Optical super-resolution histology of formalin-fixed paraffin-embedded tissue samples: challenges and opportunities.Nature communications · 2025Review
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9 authors.
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Abstract
aimsEstablishment of a protocol for routine single-molecule localisation microscopy (SMLM) imaging on formalin fixed paraffin embedded (FFPE) tissue using medical renal disease including minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS).
methodsProtocol for normal and diseased renal FFPE tissue was developed to investigate the clinical diagnostic potential of SMLM. Antibody concentrations were determined for confocal microscopy and transferred to SMLM. Different fixatives and lengths of fixation were studied. To reduce autofluorescence, additional quenching and UV bleaching steps were compared. Optimal SMLM acquisition settings were established. SMLM data were imaged, digitally captured, stored, visually inspected and analysed quantitatively.
resultsProtocol was established on normal renal FFPE tissue and then applied to clinical diseased tissue with single and multiple markers. Antibodies against key diagnostic proteins including podocin, nephrin, collagen, laminin, synaptopodin, CD31, IgG, IgM and IgA antibodies were established for MCD, FSGS and immune-mediated renal disease. We found important characteristic differences in the renal diseases listed above.
conclusionsWe established a routine super-resolution microscopy protocol for clinical FFPE material on medical renal biopsies, which could visualise fluorescently labelled proteins in all glomeruli present with a precision of approximately 10-20 nm, with a turnaround under 48 hours. We visualised and quantitated specific protein distributions in different conditions. SMLM opens subcellular microscopy in FFPE to histopathologists on routine FFPE tissue, which can in the future be an adjunct and, in some aspects, a rapid superior alternative to electron microscopy.
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