PMID- 35213072 OWN - NLM STAT- MEDLINE DCOM- 20220301 LR - 20220301 IS - 2691-1299 (Electronic) IS - 2691-1299 (Linking) VI - 2 IP - 2 DP - 2022 Feb TI - How to Obtain High-Quality Metaphase Spreads for Molecular Cytogenetics. PG - e392 LID - 10.1002/cpz1.392 [doi] AB - Interphase or metaphase nuclei can be accessed in molecular cytogenetic analyses. Metaphase spreads are routinely studied by fluorescence in situ hybridization (FISH) to answer clinical genetic questions. Even though metaphase quality is essential for FISH studies, there is limited ability in clinical cases to improve the quality of cytogenetic preparations. However, the quality of preps is important for the exact localization of FISH signals, which is necessary to identify individual chromosomes and chromosomal sub-regions using inverted DAPI banding. Here we present an efficient and easy-to-perform variant of standard slide pretreatment before a normal FISH procedure. This method reproducibly leads to solid, "steel," nonfuzzy, and well-DAPI-banded metaphases. This protocol works in blood lymphocyte and amniotic fluid-derived fibroblasts. (c) 2022 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol: Slide pretreatment for high-quality metaphases for molecular cytogenetics. CI - (c) 2022 The Authors. Current Protocols published by Wiley Periodicals LLC. FAU - Liehr, Thomas AU - Liehr T AD - Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Jena, Germany. FAU - Weise, Anja AU - Weise A AD - Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Jena, Germany. FAU - Person, Luisa AU - Person L AD - Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Jena, Germany. FAU - Padutsch, Niklas AU - Padutsch N AD - Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Jena, Germany. FAU - Kankel, Stefanie AU - Kankel S AD - Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Jena, Germany. LA - eng PT - Journal Article PL - United States TA - Curr Protoc JT - Current protocols JID - 101773894 SB - IM MH - Cytogenetic Analysis MH - Cytogenetics MH - In Situ Hybridization, Fluorescence/methods MH - Interphase MH - *Metaphase/genetics OTO - NOTNLM OT - DAPI-banding OT - chromosome identification OT - fluorescence in situ hybridization OT - inverted DAPI OT - lymphocytes/amniocytes OT - metaphase FISH OT - molecular cytogenetics EDAT- 2022/02/26 06:00 MHDA- 2022/03/03 06:00 CRDT- 2022/02/25 12:25 PHST- 2022/02/25 12:25 [entrez] PHST- 2022/02/26 06:00 [pubmed] PHST- 2022/03/03 06:00 [medline] AID - 10.1002/cpz1.392 [doi] PST - ppublish SO - Curr Protoc. 2022 Feb;2(2):e392. doi: 10.1002/cpz1.392.