» Articles » PMID: 38528611

Effects of Alendronate on Cartilage Lesions and Micro-architecture Deterioration of Subchondral Bone in Patellofemoral Osteoarthritic Ovariectomized Rats with Patella-baja

Overview
Publisher Biomed Central
Specialty Orthopedics
Date 2024 Mar 26
PMID 38528611
Authors
Affiliations
Soon will be listed here.
Abstract

Background: Patellofemoral osteoarthritis (PFJOA) is a subtype of knee OA, which is one of the main causes of anterior knee pain. The current study found an increased prevalence of OA in postmenopausal women, called postmenopausal OA. Therefore, we designed the ovariectomized rat model of patella baja-induced PFJOA. Alendronate (ALN) inhibits osteoclast-mediated bone loss, and has been reported the favorable result of a potential intervention option of OA treatment. However, the potential effects of ALN treatment on PFJOA in the ovariectomized rat model are unknown and need further investigation prior to exploration in the clinical research setting. In this study, the effects of ALN on articular cartilage degradation and subchondral bone microstructure were assessed in the ovariectomized PFJOA rat model for 10 weeks.

Methods: Patella baja and estrogen withdrawal were induced by patellar ligament shortening (PLS) and bilateral ovariectmomy surgeries in 3-month-old female Sprague-Dawley rats, respectively. Rats were randomly divided into five groups (n = 8): Sham + V; OVX + V, Sham + PLS + V, OVX + PLS + V, OVX + PLS + ALN (ALN: 70 μg/kg/week). Radiography was performed to evaluate patellar height ratios, and the progression of PFJOA was assessed by macroscopic and microscopic analyses, immunohistochemistry and micro-computed tomography (micro-CT).

Results: Our results found that the patella baja model prepared by PLS can successfully cause degeneration of articular cartilage and subchondral bone, resulting in changes of PFJOA. OVX caused a decrease in estrogen levels in rats, which aggravated the joint degeneration caused by PFJOA. Early application of ALN can delay the degenerative changes of articular cartilage and subchondral bone microstructure in castrated PFJOA rat to a certain extent, improve and maintain the micrometabolism and structural changes of cartilage and subchondral bone.

Conclusion: The early application of ALN can delay the destruction of articular cartilage and subchondral bone microstructure in castrated PFJOA rat to a certain extent.

Citing Articles

Incidence of Total Knee Arthroplasty in Older Females with Knee Osteoarthritis and Osteoporosis Treated with Denosumab Compared with Those Treated Using Bisphosphonates: A Population-Based Cohort Study.

Yu T, Wu W, Lee R, Chen I, Wang J, Wen S Life (Basel). 2025; 14(12.

PMID: 39768410 PMC: 11677198. DOI: 10.3390/life14121704.

References
1.
Randsborg P, Aroen A, Owesen C . The Effect of Lesion Size on Pain and Function in Patients Scheduled for Cartilage Surgery of the Knee. Cartilage. 2022; 13(2):19476035221109242. PMC: 9277437. DOI: 10.1177/19476035221109242. View

2.
Mankin H, DORFMAN H, Lippiello L, Zarins A . Biochemical and metabolic abnormalities in articular cartilage from osteo-arthritic human hips. II. Correlation of morphology with biochemical and metabolic data. J Bone Joint Surg Am. 1971; 53(3):523-37. View

3.
Papathanasiou I, Michalitsis S, Hantes M, Vlychou M, Anastasopoulou L, Malizos K . Molecular changes indicative of cartilage degeneration and osteoarthritis development in patients with anterior cruciate ligament injury. BMC Musculoskelet Disord. 2016; 17:21. PMC: 4712525. DOI: 10.1186/s12891-016-0871-8. View

4.
Dye S . The pathophysiology of patellofemoral pain: a tissue homeostasis perspective. Clin Orthop Relat Res. 2005; (436):100-10. DOI: 10.1097/01.blo.0000172303.74414.7d. View

5.
Chen K, Zhang N, Ding L, Zhang W, Hu J, Zhu S . Early intra-articular injection of alendronate reduces cartilage changes and subchondral bone loss in rat temporomandibular joints after ovariectomy. Int J Oral Maxillofac Surg. 2014; 43(8):996-1004. DOI: 10.1016/j.ijom.2014.04.003. View