title: Computerized histomorphometric study of the splenic collagen polymorphism: A control-tissue for polarization microscopy.
abstract: Previous articles have pointed out the presence of type III collagen within the extracellular structure of the parenchymatous organs. This study aimed to quantitatively characterize the collagen polymorphism at the capsule and parenchymal trabeculae of the largest lymphoid organ of the body i.e., the spleen, in mouse, rat, and rabbit models. Following a Picrosirius Red-Polarization procedure and computer assisted image analysis of paraffin sections, the results showed (1) a predominant and significantly higher amount of type III collagen in the trabeculae area compared to the capsule area in the three species, (2) no statistical difference among the three species concerning the parenchymal collagen polymorphism or the type I/type III collagen ratio, (3) a heterogeneous type I/type III collagen ratio varying from 0.86 (mouse) to 6.62 (rabbit) in the fibromuscular capsule region. A qualitative analysis corroborated these histomorphometric results. In conclusion, the spleen may be used as (1) a control tissue to qualitatively visualize type I and III collagen under polarization microscopy and to validate the quality of PSR staining (2) an aid to accurately calibrate the angle of polarization before quantitative measurements of type I and type III collagen. Among the studied species, the rabbit spleen appeared to be the most appropriate control tissue as it showed the highest amount of type I collagen in the capsule and a similarly high amount of type III collagen in the parenchymal trabeculae.
authors.affiliation: Laboratoire Des Multimatériaux Et Interfaces (UMR CNRS 5615), Université Lyon 1, Lyon, France.|NAMSA, 115 Rue Pasteur, Chasse-sur-Rhône, 38670, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Alves
authors.affiliation: Laboratoire Des Multimatériaux Et Interfaces (UMR CNRS 5615), Université Lyon 1, Lyon, France.|Faculté d'Odontologie, Université Lyon 1, Lyon, France.|Service De Consultations Et De Traitements Dentaires, Hospices Civils De Lyon, Lyon, France.
authors.forename: Kerstin
authors.initials: K
authors.lastname: Gritsch
authors.affiliation: NAMSA, 115 Rue Pasteur, Chasse-sur-Rhône, 38670, France.|Institut Supérieur D'ingénieurs De Franche-Comté, Besançon, France.
authors.forename: Camille
authors.initials: C
authors.lastname: Sirieix
authors.affiliation: NAMSA, 115 Rue Pasteur, Chasse-sur-Rhône, 38670, France.
authors.forename: Elodie
authors.initials: E
authors.lastname: Drevon-Gaillot
authors.affiliation: Covidien - Sofradim Production, Trévoux, France.
authors.forename: Yves
authors.initials: Y
authors.lastname: Bayon
authors.affiliation: NAMSA, 115 Rue Pasteur, Chasse-sur-Rhône, 38670, France.
authors.forename: Gaëlle
authors.initials: G
authors.lastname: Clermont
authors.affiliation: NAMSA, 115 Rue Pasteur, Chasse-sur-Rhône, 38670, France.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Boutrand
authors.affiliation: Laboratoire Des Multimatériaux Et Interfaces (UMR CNRS 5615), Université Lyon 1, Lyon, France.|Faculté d'Odontologie, Université Lyon 1, Lyon, France.|Service De Consultations Et De Traitements Dentaires, Hospices Civils De Lyon, Lyon, France.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Grosgogeat
mesh_terms: D000818:Animals; D001699:Biometry / Q000379:methods; D003094:Collagen / Q000032:analysis*; D051379:Mice; D008859:Microscopy, Polarization / Q000379:methods* / Q000592:standards*; D010336:Pathology / Q000379:methods*; D011817:Rabbits; D051381:Rats; D013154:Spleen / Q000737:chemistry*
chemical_list: D003094:Collagen
keywords: Picrosirius red-polarization method; collagen type I/III ratio; histomorphometry; quantitative pathology