AI Article Synopsis
- Patellofemoral osteoarthritis (PFJOA) is a type of knee osteoarthritis that mainly affects postmenopausal women, leading to significant anterior knee pain; the study aimed to explore this condition using an ovariectomized rat model.
- The researchers induced PFJOA in the rats through surgeries and treated some with Alendronate (ALN), which is known to inhibit bone loss, to observe its effects on joint health over 10 weeks.
- Results indicated that PFJOA leads to cartilage and bone degeneration, but early ALN treatment showed promise in slowing these degenerative changes and improving joint microstructure in the ovariectomized rats.
Article 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.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10962137 | PMC |
| http://dx.doi.org/10.1186/s13018-024-04677-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Fetal Cartilage Progenitor Cells in the Repair of Osteochondral Defects.
JB JS Open Access
January 2025
Gluck Equine Research Center, Department of Veterinary Science, Martin-Gatton College of Agriculture, Food and Environment, University of Kentucky, Lexington, Kentucky.
Background: Therapies for cartilage restoration are of great interest, but current options provide limited results. In salamanders, interzone (IZN) tissue can regenerate large joint lesions. The mammalian homolog to this tissue exists during fetal development and exhibits remarkable chondrogenesis in vitro.
View Article and Find Full Text PDFA ROS-responsive hydrogel encapsulated with matrix metalloproteinase-13 siRNA nanocarriers to attenuate osteoarthritis progression.
J Nanobiotechnology
January 2025
State Key Laboratory of Pharmaceutical Biotechnology, Division of Sports Medicine and Adult Reconstructive Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing, 210008, People's Republic of China.
RNA interference (RNAi) and oxidative stress inhibition therapeutic strategies have been extensively utilized in the treatment of osteoarthritis (OA), the most prevalent degenerative joint disease. However, the synergistic effects of these approaches on attenuating OA progression remain largely unexplored. In this study, matrix metalloproteinase-13 siRNA (siMMP-13) was incorporated onto polyethylenimine (PEI)-polyethylene glycol (PEG) modified FeO nanoparticles, forming a nucleic acid nanocarrier termed si-Fe NPs.
View Article and Find Full Text PDFBiomimetic bone cartilage scaffolds based on trilayer methacrylated hydroxyapatite/GelMA composites for full-thickness osteochondral regeneration.
Int J Biol Macromol
January 2025
Department of Pharmaceutical Analysis, Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, The School of Pharmacy, Fujian Medical University, Fuzhou 350122, China. Electronic address:
Since cartilage injury is often accompanied by subchondral bone damage, conventional single-phase materials cannot accurately simulate the osteochondral structure or repair osteochondral injury. In this work, a gradient gelatin-methacryloyl (GelMA) hydrogel scaffold was constructed by a layer-by-layer stacking method to realize full-thickness regeneration of cartilage, calcified cartilage and subchondral bone. Of note, to surmount the inadequate mechanical property of GelMA hydrogel, nanohydroxyapatite (nHA) was incorporated and further functionalized with hydroxyethyl methacrylate (nHA-hydroxyethyl methacrylate, nHAMA) to enhance the interfacial adhesion with the hydrogel, resulting in better mechanical strength akin to human bone.
View Article and Find Full Text PDFPostnatal deletion of Phlpp1 in chondrocytes delays post-traumatic osteoarthritis in male mice.
Osteoarthr Cartil Open
March 2025
Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA.
Objective: Osteoarthritis is a chronic, debilitating disease that causes long-term pain and immobility. Germline deletion of Phlpp1 or administration of small molecules that inhibit Phlpp1 prevents post-traumatic osteoarthritis (PTOA) in mice. However, the chondrocyte-intrinsic role of Phlpp1 in PTOA progression is unknown.
View Article and Find Full Text PDFSubchondral insufficiency fracture of the knee.
Orthopadie (Heidelb)
January 2025
Department of Orthopedic Surgery, Mayo Clinic, 200 First St. SW, 55905, Rochester, MN, USA.
Subchondral insufficiency fractures of the knee (SIFK) are a relatively common cause of knee pain, particularly in middle-aged and older adults. The SIFK is a type of stress fracture that occurs when excessive and repetitive or supraphysiologic loads are applied to subchondral bone [1]. Historically, this type of fracture was termed spontaneous osteonecrosis of the knee (SONK) until advances in MRI identified underlying fractures as well as meniscal deficiency as likely attributable etiologies.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!