PMID- 32946120 OWN - NLM STAT- MEDLINE DCOM- 20210809 LR - 20210809 IS - 1097-0290 (Electronic) IS - 0006-3592 (Linking) VI - 117 IP - 10 DP - 2020 Oct TI - A comprehensive model for the diffusion and hybridization processes of nucleic acid probes in fluorescence in situ hybridization. PG - 3212-3223 LID - 10.1002/bit.27462 [doi] AB - Fluorescence in situ hybridization (FISH) has been extensively used in the past decades for the detection and localization of microorganisms. However, a mechanistic approach of the whole FISH process is still missing, and the main limiting steps for the hybridization to occur remain unclear. In here, FISH is approached as a particular case of a diffusion-reaction kinetics, where molecular probes (MPs) move from the hybridization solution to the target RNA site within the cells. Based on literature models, the characteristic times taken by different MPs to diffuse across multiple cellular barriers, as well as the reaction time associated with the formation of the duplex molecular probe-RNA, were estimated. Structural and size differences at the membrane level of bacterial and animal cells were considered. For bacterial cells, the limiting step for diffusion is likely to be the peptidoglycan layer (characteristic time of 7.94 x 10(2) - 4.39 x 10(3) s), whereas for animal cells, the limiting step should be the diffusion of the probe through the bulk (1.8-5.0 s) followed by the diffusion through the lipid membrane (1 s). The information provided here may serve as a basis for a more rational development of FISH protocols in the future. CI - (c) 2020 Wiley Periodicals LLC. FAU - Lima, Joana F AU - Lima JF AUID- ORCID: 0000-0003-2459-6729 AD - LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal. AD - Biomode, S.A., Braga, Portugal. AD - i3S, Instituto de Investigacao e Inovacao em Saude, Universidade do Porto, Porto, Portugal. AD - Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal. FAU - Maia, Paulo AU - Maia P AD - LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal. FAU - T Magalhaes, Beatriz AU - T Magalhaes B AUID- ORCID: 0000-0003-4434-6989 AD - LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal. FAU - Cerqueira, Laura AU - Cerqueira L AUID- ORCID: 0000-0001-8452-4749 AD - LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal. AD - Biomode, S.A., Braga, Portugal. FAU - Azevedo, Nuno F AU - Azevedo NF AUID- ORCID: 0000-0001-5864-3250 AD - LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal. LA - eng GR - POCI-01-0145-FEDER-029961/Fundacao para a Ciencia e a Tecnologia/International GR - POCI-01-0145-FEDER-031011/Fundacao para a Ciencia e a Tecnologia/International GR - SFRH/BD/143491/2019/Fundacao para a Ciencia e a Tecnologia/International GR - SFRH/BDE/51909/2012/Fundacao para a Ciencia e a Tecnologia/International GR - UIDB/00511/2020/Fundacao para a Ciencia e a Tecnologia/International PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20200702 PL - United States TA - Biotechnol Bioeng JT - Biotechnology and bioengineering JID - 7502021 RN - 0 (Fluorescent Dyes) RN - 0 (Nucleic Acid Probes) SB - IM MH - Animals MH - Bacteria MH - Cells, Cultured MH - Diffusion MH - Fluorescent Dyes/*chemistry MH - In Situ Hybridization, Fluorescence/*methods MH - Nucleic Acid Probes/*chemistry OTO - NOTNLM OT - FISH OT - cellular barriers OT - diffusion OT - molecular probes OT - nucleic acid mimics EDAT- 2020/09/19 06:00 MHDA- 2021/08/10 06:00 CRDT- 2020/09/18 12:14 PHST- 2020/03/04 00:00 [received] PHST- 2020/06/02 00:00 [revised] PHST- 2020/06/05 00:00 [accepted] PHST- 2020/09/18 12:14 [entrez] PHST- 2020/09/19 06:00 [pubmed] PHST- 2021/08/10 06:00 [medline] AID - 10.1002/bit.27462 [doi] PST - ppublish SO - Biotechnol Bioeng. 2020 Oct;117(10):3212-3223. doi: 10.1002/bit.27462. Epub 2020 Jul 2.