Change search
ReferencesLink to record
Permanent link

Direct link
Hyaluronan is differently located in arteries and veins: an immunohistochemical study in the rat
Umeå University, Faculty of Medicine, Public Health and Clinical Medicine.
2003 (English)In: Cells Tissues Organs, ISSN 1422-6405, Vol. 173, no 4, 227-233 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
2003. Vol. 173, no 4, 227-233 p.
URN: urn:nbn:se:umu:diva-2339DOI: 10.1159/000070378PubMedID: 12766352OAI: diva2:140293
Available from: 2007-05-10 Created: 2007-05-10Bibliographically approved
In thesis
1. Hyaluronan and the receptor CD 44 in the heart and vessels: a study in normal and pathological conditions
Open this publication in new window or tab >>Hyaluronan and the receptor CD 44 in the heart and vessels: a study in normal and pathological conditions
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Tissues are not solely composed of cells. The extracellular matrix is important for the cell well-being and cell-cell communication. The glycosaminoglycan hyaluronan (HYA) is a widely distributed extracellular matrix (ECM) component. The molecule has prominent physicochemical properties, foremost viscoelastic and osmotic, but participates in many biological processes such as cell migration, proliferation, tissue turnover, wound healing and angiogenesis. HYA is synthesised by either of three different hyaluronan-synthesising enzymes, HAS1-3, and its main ligand is the transmembrane receptor CD44. In the heart and vessels the matrix components are of great importance for endurance and elasticity which are prerequisites for a normal function. The aims of the study were to describe the distribution of HYA and its receptor CD44 in normal cardiovascular tissue and to investigate the ECM composition in myocardial hypertrophy.

Normal conditions were studied in a rat model. These studies showed that the tunica adventitia in almost all vessels stained strongly for HYA. The expression in the tunica intima and media on the venous side, differed between the vessels and was almost absent on the arterial side. In the adult animals only minute amounts of CD44 were detected. The expression of both HYA and CD44 was increased in newborn rats.

In the heart HYA was unevenly distributed in the interstitium. Strong HYA-staining was seen in the valves and in the adventitia of intramyocardial vessels. Almost no CD44-staining was observed. Notably, there was no obvious difference between newborn and adult animals.

In an experimental rat model of pressure-induced cardiac hypertrophy the mRNA-levels of HAS1, HAS2, CD44, basic Fibroblast Growth Factor (FGF-2) and Fibroblast Growth Factor Receptor-1 (FGFR-1) were elevated on day 1 after aortic banding. HAS2, CD44 and FGFR-1 were at basal levels on day 42. The HYA-concentration was significally elevated on day 1. HYA was detected in the interstitium by histochemistry and CD44 was detected mainly in and around the intramyocardial vessels.

The HYA-staining was increased in myectomi specimens from patients with HCM compared to controls. HYA was detected in the interstitium, in fibrous septas and in the adventitia of intramyocardial vessels. No CD44 was detected in HCM or in control specimens.

Our results indicate that HYA and CD44 play an active role in the maturing vessel tree and that the ECM content of HYA is increased in experimental myocardial hypertrophy and human hypertrophic cardiomyopathy.

Place, publisher, year, edition, pages
Umeå: Folkhälsa och klinisk medicin, 2007. 53 p.
Umeå University medical dissertations, ISSN 0346-6612 ; 1104
hyaluronan, CD44, heart, Rat, cardiac hypertrophy, artery, vein, human
Research subject
urn:nbn:se:umu:diva-1128 (URN)978-91-7264-324-6 (ISBN)
Public defence
2007-06-01, Sal B, Tandläkarhögskolan, 9tr, Norrlands universitets sjukhus, Umeå, 09:00 (English)
Available from: 2007-05-10 Created: 2007-05-10 Last updated: 2011-04-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed
By organisation
Public Health and Clinical Medicine
In the same journal
Cells Tissues Organs

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 33 hits
ReferencesLink to record
Permanent link

Direct link