Universität zu Köln

Grevenstein, David, Oppermann, Johannes, Winter, Lina ORCID: 0009-0005-7931-0662, Barsch, Friedrich ORCID: 0000-0002-6189-7259, Niedermair, Tanja, Mamilos, Andreas, Eysel, Peer and Brochhausen, Christoph (2022). First detection of primary cilia in injured human anterior cruciate ligament: A pilot study with pathophysiological reflections. Pathol. Res. Pract., 237. MUNICH: ELSEVIER GMBH. ISSN 1618-0631

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Abstract

The anterior cruciate ligament (ACL) plays a significant role in knee stability, protects the joint under multiple loading conditions and shows complex biomechanics. Beside mechanical stability, the ACL seems to play a crucial role in proprioception, and it is well known, that ACL injuries can cause functional deficits due to decreased proprioception. However, the mechanism of proprioception is not completely understood yet. In this context, primary cilia (PC), which play a significant role in the signaling between the intra-and extracellular space, could be of interest. However, until today, primary cilia are not yet described in human ACL. In total, seven human ACL's underwent transmission electron microscopical examination. Three cadaveric ACL's and four freshly injured ACL's were examined. Single cells of each ACL were examined regarding the presence of axo-nemes or basal bodies, which represent components of a PC. In total, 276 cells of the cadaveric ACL's and 180 cells of the injured ACL's were examined. Basal bodies could be detected in three of the four specimens of the injured ACL's as well as in one of the three cadaveric ACL's, resulting in a mean positivity of 2.54% in the cadaveric group and 2.78% in the injured group. In case of PC-presence, only one PC per cell could be detected. No statistically significant difference regarding the frequency could be detected between both groups. In this pilot-study, we present for the first time an ultrastructural study of human ACLs with respect to the occurrence of PC and any structural and morphological features of these complex and dynamic cell organelles. PCs are present in almost all non-hematopoietic tissues of the human body. However, there are different reports on the number, incidence, orientation, and morphology of these cell organelles in the respective tissues. Compared to other tissues and ligaments of other species, we found a significantly lower rate of PC positive cells. This observation might represent a tissue-specific characteristic of ACL tissue. However, our observations need to be explored in more detail in further studies.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Grevenstein, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Oppermann, Johannes UNSPECIFIED UNSPECIFIED UNSPECIFIED Winter, Lina UNSPECIFIED orcid.org/0009-0005-7931-0662 UNSPECIFIED Barsch, Friedrich UNSPECIFIED orcid.org/0000-0002-6189-7259 UNSPECIFIED Niedermair, Tanja UNSPECIFIED UNSPECIFIED UNSPECIFIED Mamilos, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Eysel, Peer UNSPECIFIED UNSPECIFIED UNSPECIFIED Brochhausen, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-672793
DOI:	10.1016/j.prp.2022.154036
Journal or Publication Title:	Pathol. Res. Pract.
Volume:	237
Date:	2022
Publisher:	ELSEVIER GMBH
Place of Publication:	MUNICH
ISSN:	1618-0631
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ACL RECONSTRUCTION; INTRAFLAGELLAR TRANSPORT; GROWTH-PLATE; ANATOMY; PROPRIOCEPTION Multiple languages Pathology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67279