Objectives. The aim of this study was to investigate the role of miR-126 in the development of osteoarthritis, as well as the potential molecular mechanisms involved, in order to provide a theoretical basis for osteoarthritis treatment and a novel perspective for clinical therapy. Methods. Human chondrocyte cell line CHON-001 was administrated by different doses of interleukin (IL)-1β to simulate
Aseptic
Introduction and Objective. Intervertebral disc (IVD) degeneration is one of the major contributors to low back pain, the leading cause of disability worldwide. This multifactorial pathological process involves the degradation of the extracellular matrix,
As peri-prosthetic aseptic loosening is one of the main causes of implant failure, inhibiting wear particles induced macrophages
Tendinopathy is the most frequent musculoskeletal disease that requires medical attention. Mechanical overload has been considered as a key driver of its pathology. However, the underline mechanism on how overload induces tendinopathy and
MicroRNA (miR) delivery to regulate chronic
Osteoarthritis (OA) is a degenerative joint disease affecting millions worldwide. Early detection of OA and monitoring its progression is essential for effective treatment and for preventing irreversible damage. Although sensors have emerged as a promising tool for monitoring analytes in patients, their application for monitoring the state of pathology is currently restricted to specific fields (such as diabetes). In this study, we present the development of an optical sensor system for real-time monitoring of
In osteoarthritis, chondrocytes acquire a hypertrophic phenotype that contributes to matrix degradation.
Aims. This study intended to investigate the effect of vericiguat (VIT) on titanium rod osseointegration in aged rats with iron overload, and also explore the role of VIT in osteoblast and osteoclast differentiation. Methods. In this study, 60 rats were included in a titanium rod implantation model and underwent subsequent guanylate cyclase treatment. Imaging, histology, and biomechanics were used to evaluate the osseointegration of rats in each group. First, the impact of VIT on bone integration in aged rats with iron overload was investigated. Subsequently, VIT was employed to modulate the differentiation of MC3T3-E1 cells and RAW264.7 cells under conditions of iron overload. Results. Utilizing an OVX rat model, we observed significant alterations in bone mass and osseointegration due to VIT administration in aged rats with iron overload. The observed effects were concomitant with reductions in bone metabolism, oxidative stress, and
Vascular
As high incidences of tendinopathies are observed particularly in those who intensively use their tendons, we assume that pathological changes are caused, at least partially, by mechanical overload. This has led to the so-called overload hypothesis, explaining the development of tendinopathies by structural failure resulting from excessive load. At the same time, tendon loading is an important part in tendon rehabilitation. Currently, exercise treatment approaches such as eccentric training or heavy load resistance training are widely applied in tendinopathy rehabilitation, with good clinical results such as an improvement in function and a reduction in pain. Particularly those rehabilitative approaches which impose high strains on the tendon may induce an adaptation of the tendon's mechanical properties such as increased tendon stiffness. An increased tendon stiffness is often interpreted as desirable, as it may protect the tendon from overloading and thus prevent future strain injuries. However, the tendinopathic tendon is not necessarily less stiff than the tendon in the contralateral leg and an improvement in tendon stiffness is not necessarily accompanied by an improvement in tendon pain or function. In addition, metabolic factors, resulting e.g. in low-level systemic
In cartilage tissue engineering (TE),new solutions are needed to effectively drive chondrogenic differentiation of mesenchymal stromal cells in both normal and inflammatory milieu. Ultrasound waves represent an interesting tool to facilitate chondrogenesis. In particular, low intensity pulsed ultrasound (LIPUS)has been shown to regulate the differentiation of adipose mesenchymal stromal cells. Hydrogels are promising biomaterials capable of encapsulating MSCs by providing an instructive biomimetic environment, graphene oxide (GO) has emerged as a promising nanomaterial for cartilage TE due to its chondroinductive properties when embedded in polymeric formulations, and piezoelectric nanomaterials, such as barium titanate nanoparticles (BTNPs),can be exploited as nanoscale transducers capable of inducing cell growth/differentiation. The aim of this study was to investigate the effect of dose-controlled LIPUS in counteracting
When joints sustain injury, the release of
Abstract. OBJECTIVE. Changes in subchondral bone are one of few disease characteristics to correlate with pain in OA. 1. Profound neuroplasticity and nociceptor sprouting is displayed within osteoarthritic (OA) subchondral bone and is associated with pain and pathology. 2. The cause of these neural changes remains unestablished. Correct innervation patterns are indispensable for bone growth, homeostasis, and repair. Axon guidance signalling factor, Sema3A is essential for the correct innervation patterning of bony tissues. 3. , expressed in osteocytes. 4. and known to be downregulated in bone OA mechanical loading. 5. Bioinformatic analysis has also shown Sema3a as a differentially expressed pathway by bone in human OA patients. 6. HYPOTHESIS: Pathological mechanical load and
Osteoarthritis (OA) is a common cause of chronic pain. Subchondral bone is highly innervated, and bone structural changes directly correlate with pain in OA. Mechanisms underlying skeletal–neural interactions are under-investigated. Bone derived axon guidance molecules are known to regulate bone remodelling. Such signals in the nervous system regulate neural plasticity, branching and neural
Summary Statement. Antioxidant containing UHMWPE particles induced similar levels of in vitro macrophage proliferation and in vivo
Aim. This study aimed to assess whether the severity of symptoms (assessed with the Oxford Hip Score (OHS)) can relate to the levels of mRNA expression of markers for muscle
Summary Statement. We observed that severe muscle weakness leads to OA, whereas a transient inflammatory stimulus did not have a significant effect on cartilage degradation. This arises the thought that a severe but transient
The purpose of this study was to evaluate the beneficial effects of r-Irisin (IR) on human primary tenocytes (hTCs) in vitro. Indeed, Irisin is secreted from muscles in response to exercise and mediates many beneficial effects on tissues and organs. Tissue samples (n=3) were analyzed by histology and immunohistochemistry for αVβ5 receptor. hTCs isolated, culture expanded were treated with: 1) RPMI medium as control; 2) IR at different concentrations; 3) IL-1β; 4) pre-treated with IL-1β for 24 h and then co-treated with IR; 5) pre-treated with IR for 24 h and then co-treated with IL-1β. We evaluated: cell metabolic activity (MTT); cell proliferation (trypan blue staining and PicoGreen); nitrite concentration (Griess). The analysis were performed in triplicate for each donor and each experiment was repeated at least three times. Data were expressed as mean ± S.D. One-way ANOVA analysis was used to compare the groups under exam. We found the presence of the αVβ5 receptor on hTCs plasma membrane supporting the potential interaction with irisin. Cell proliferation was significantly increased with IR at 5, 10 and 25 ng/mL. IR 25 ng/mL after IL1β pre-treatment was able to counteract the increase of nitrite production (p < 0.001) compared to the inflamed hTCs (p < 0.01; p < 0.0001), as well as IR at 10 and 25 ng/ml showed a protective role from oxidative damage. We observed a significant increase in cell metabolic viability in culture under IR at 5 and 25 ng/mL (p < 0.001; p < 0.05) in the pre-treated IR groups, whereas IR showed anti-inflammatory effects at the highest concentration of r-Irisin (p < 0.05). This is the first study reporting the capability of irisin to attenuate tendinopathy in vitro by acting on acute inflamed tenocytes. Our results confirmed and highlighted the potential cross-talk mechanism between muscle and tendon.
Osteoarthritis (OA), characterised by pain, disability and joint degeneration, is common and has no cure. Prevalence of severe radiographic knee OA is 19% in over 45's and 50% in over 75's in the US and Europe. Abnormal joint loading, or injury, increase risk of OA. We have discovered that glutamatergic signalling is mechanically regulated and glutamate receptors (GluR) drive