BACKGROUND: fibrosis is associated with various cardiac pathologies and dysfunction. Current quantification methods are time-consuming and laborious. We describe a semi-automated quantification technique for myocardial fibrosis and validated this using traditional methods. METHODS: pulmonary Hypertension (PH) was induced in adult Wistar rats by subcutaneous monocrotaline (MCT) injection (40 mg/kg). Cryosections of myocardial tissue (5 microm) of PH rats (n=9) and controls (n=9) were stained using Picrosirius red and scanned with a digital microscopic Mirax slide scanner. From these sections 21 images were taken randomly of each heart. Using ImageJ software a macro for automated image analysis of the amount of fibrosis was developed. For comparison, fibrosis was quantified using traditional polarisation microscopy. Both methods were correlated and validated against stereology as the gold standard. Furthermore, the method was tested in paraffin-embedded human tissues. RESULTS: automated analysis showed a significant increase of fibrosis in PH hearts vs. control. Automated analysis correlated with traditional polarisation and stereology analysis (r2=0.92 and r2=0.95, respectively). In human heart, lungs, kidney and liver, a similar correlation with stereology (r2=0.91) was observed. Time required for automated analysis was 22 and 33% of the time needed for stereology and polarisation analysis, respectively. CONCLUSION: automated quantification of fibrosis is feasible, objective and time-efficient.
BACKGROUND:fibrosis is associated with various cardiac pathologies and dysfunction. Current quantification methods are time-consuming and laborious. We describe a semi-automated quantification technique for myocardial fibrosis and validated this using traditional methods. METHODS:pulmonary Hypertension (PH) was induced in adult Wistar rats by subcutaneous monocrotaline (MCT) injection (40 mg/kg). Cryosections of myocardial tissue (5 microm) of PH rats (n=9) and controls (n=9) were stained using Picrosirius red and scanned with a digital microscopic Mirax slide scanner. From these sections 21 images were taken randomly of each heart. Using ImageJ software a macro for automated image analysis of the amount of fibrosis was developed. For comparison, fibrosis was quantified using traditional polarisation microscopy. Both methods were correlated and validated against stereology as the gold standard. Furthermore, the method was tested in paraffin-embedded human tissues. RESULTS: automated analysis showed a significant increase of fibrosis in PH hearts vs. control. Automated analysis correlated with traditional polarisation and stereology analysis (r2=0.92 and r2=0.95, respectively). In human heart, lungs, kidney and liver, a similar correlation with stereology (r2=0.91) was observed. Time required for automated analysis was 22 and 33% of the time needed for stereology and polarisation analysis, respectively. CONCLUSION: automated quantification of fibrosis is feasible, objective and time-efficient.
Authors: Sara F Ferreiro; Natalia Vilariño; Cristina Carrera; M Carmen Louzao; Antonio G Cantalapiedra; Germán Santamarina; J Manuel Cifuentes; Andrés C Vieira; Luis M Botana Journal: Toxicol Sci Date: 2016-02-10 Impact factor: 4.849
Authors: Anja M van der Laan; Ellis N Ter Horst; Ronak Delewi; Mark P V Begieneman; Paul A J Krijnen; Alexander Hirsch; Mehrdad Lavaei; Matthias Nahrendorf; Anton J Horrevoets; Hans W M Niessen; Jan J Piek Journal: Eur Heart J Date: 2013-08-21 Impact factor: 29.983
Authors: Maria J Overbeek; Koen T B Mouchaers; Hans M Niessen; Awal M Hadi; Koba Kupreishvili; Anco Boonstra; Alexandre E Voskuyl; Jeroen A M Belien; Egbert F Smit; Ben C Dijkmans; Anton Vonk-Noordegraaf; Katrien Grünberg Journal: Int J Rheumatol Date: 2010-09-30
Authors: Sjoerd H den Uil; Evert van den Broek; Veerle M H Coupé; Thomas T Vellinga; Pien M Delis-van Diemen; Herman Bril; Eric J Th Belt; Onno Kranenburg; Hein B A C Stockmann; Jeroen A M Belien; Gerrit A Meijer; Remond J A Fijneman Journal: BMC Gastroenterol Date: 2019-08-16 Impact factor: 3.067