Medicinski pregled 2016 Volume 69, Issue 1-2, Pages: 16-23
https://doi.org/10.2298/MPNS1602016S
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Expression of collagen type I in unaltered and osteoarthritic menisci of knee joint
Sladojević Igor (University of Banja Luka, Faculty of Medicine, Department of Anatomy, Banja Luka, Bosnia and Herzegovina)
Krivokuća Zdenka (University of Banja Luka, Faculty of Medicine, Department of Anatomy, Banja Luka, Bosnia and Herzegovina)
Gajanin Vesna (University of Banja Luka, Faculty of Medicine, Department of Anatomy, Banja Luka, Bosnia and Herzegovina)
Manojlović Slavko (University of Banja Luka, Faculty of Medicine, Department of Physical Medicine and Rehabilitation “Dr Miroslav Zotović”, Banja Luka, Bosnia and Herzegovina)
Introduction. Knee osteoarthritis is a progressive degenerative disease which
affects meniscal tissue. The aim of this study was to determine the
differences in collagen type I expression in macroscopically unaltered and
osteoarthritic menisci, and correlate the expression with the grade of
macroscopic damage, age and body mass index of patients, preoperative
condition of anterior cruciate ligament, angulation and knee contracture.
Material and Methods. The control group consisted of 10 macroscopically
unaltered menisci, while the experimental group had 35 osteoarthritic
menisci. Besides macroscopic grading of meniscal damage, the analysis of
collagen type I expression was determined by immunohistochemical staining
with the corresponding antibody using semiquantitative scale scores and
quantitative parameters: intensity of expression and stained area size.
Results. The results of semiquantitative evaluation showed a statistically
significant decrease in collagen type I expression in osteoarthritic menisci,
which correlated with an increase in macroscopic damage grade. The results of
quantitative evaluation did not show a statistically significant decrease in
the expression. In posterior meniscal horns, a more intense collagen type I
expression was seen in the women, as well as a positive correlation of
quantitatively evaluated expression with body mass index. Collagen type I
expression in the anterior horns was significantly lower in varus alignment.
Conclusion. In the semiquantitative evaluation, collagen type I expression in
osteoarthritic menisci was significantly lower compared to macroscopically
unchanged menisci. The decrease in the expression level correlates with the
increase in the grade of macroscopic meniscal damage. There was no
statistically significant difference in the quantitative evaluation of
expression.
Keywords: Knee Joint, Menisci, Tibial, Osteoarthritis, Knee, Collagen Type I, Pathological Conditions, Anatomical, Immunohistochemistry