PMID- 32840006 OWN - NLM STAT- MEDLINE DCOM- 20211019 LR - 20211019 IS - 1439-0264 (Electronic) IS - 0340-2096 (Linking) VI - 50 IP - 1 DP - 2021 Jan TI - In vivo acridine orange human spermatozoa staining-A new perspective for RNA detection and spermatozoa morphology evaluation. PG - 102-107 LID - 10.1111/ahe.12606 [doi] AB - Significant increases in male infertility and the still unresolved questions on the compatibility and interpretation of current methods in infertility diagnostics call for new protocols. Morphology, genome damage, RNA content and quantity are currently in practice as the major parameters in evaluation of sperm quality. However, results of various methods are not always in mutual concordance. In this study, in vivo acridine orange (AO) staining, which is presently in application in the estimation of genome damage in reticulocytes, was adjusted for spermatozoa staining. Ten men suffering from oligoasthenoteratozoospermia (OAT) and 10 healthy fertile men were analysed using in vivo AO staining. Microscopic analysis was performed by fluorescent and confocal fluorescent microscopy. Our results show that this method preserves spermatozoa membranes, which enables new insight into spermatozoa genome damage, RNA content in residual cytoplasm, damage of neck area with mitochondrion and tail pathology. The introduced method explains the difference between results of sperm DNA fragmentation assay and the globally used AO staining and opens new options for the development of automated systems. In conclusion, the results of our study offer (a) an innovative approach to the analysis of spermatozoa pathology, (b) enable localization and quantification of RNA in residual cytoplasm, (c) a significant contribution to research of aetiology of infertility in men, (d) open new perspectives for the automatization of sperm quality estimation and (e) improve the personalized approach in the selection of in vitro fertilization protocols. CI - (c) 2020 Wiley-VCH GmbH. FAU - Fucic, Aleksandra AU - Fucic A AUID- ORCID: 0000-0003-3642-1037 AD - Institute for Medical Research and Occupational Health, Zagreb, Croatia. AD - Scientific Centre of Excellence for Reproductive and Regenerative Medicine, University of Zagreb School of Medicine, Zagreb, Croatia. FAU - Maric, Tihana AU - Maric T AUID- ORCID: 0000-0002-6238-9811 AD - Scientific Centre of Excellence for Reproductive and Regenerative Medicine, University of Zagreb School of Medicine, Zagreb, Croatia. AD - Department of Medical biology, University of Zagreb School of Medicine, Zagreb, Croatia. FAU - Vicic Bockor, Vedrana AU - Vicic Bockor V AD - Division of Molecular Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia. FAU - Jezek, Davor AU - Jezek D AD - Scientific Centre of Excellence for Reproductive and Regenerative Medicine, University of Zagreb School of Medicine, Zagreb, Croatia. AD - Department of Histology and Embryology, University of Zagreb School of Medicine, Zagreb, Croatia. LA - eng GR - KK.01.1.1.01.0008/European Union/ PT - Journal Article DEP - 20200824 PL - Germany TA - Anat Histol Embryol JT - Anatomia, histologia, embryologia JID - 7704218 RN - 63231-63-0 (RNA) RN - F30N4O6XVV (Acridine Orange) SB - IM MH - Acridine Orange/*chemistry MH - Humans MH - Infertility, Male MH - Male MH - Microscopy, Fluorescence MH - RNA/*chemistry/*isolation & purification MH - Sperm Motility/physiology MH - Spermatozoa/*cytology MH - Staining and Labeling OTO - NOTNLM OT - acridine orange OT - confocal fluorescent microscopy OT - infertility OT - morphology OT - spermatozoa EDAT- 2020/08/26 06:00 MHDA- 2021/10/21 06:00 CRDT- 2020/08/26 06:00 PHST- 2020/05/13 00:00 [received] PHST- 2020/06/23 00:00 [revised] PHST- 2020/07/30 00:00 [accepted] PHST- 2020/08/26 06:00 [pubmed] PHST- 2021/10/21 06:00 [medline] PHST- 2020/08/26 06:00 [entrez] AID - 10.1111/ahe.12606 [doi] PST - ppublish SO - Anat Histol Embryol. 2021 Jan;50(1):102-107. doi: 10.1111/ahe.12606. Epub 2020 Aug 24.