Stem Cell-based Treatment for Osteoarthritis (OA):
Treat the Disease, not the Symptoms
Osteoarthritis (OA) is a leading cause of pain and disability across the world. With the population getting older and the increasing desire for individual freedom at older ages, new therapeutic approaches are urgently needed.
Current therapies are mainly targeting the symptoms, however, none are able to structurally modify the processes of OA or prevent the disease's progression. Stem cell therapies have yielded impressive results in regenerating damaged tissues and the underlying aging and immunologically-related processes of osteoarthritis.
With the next generation of stem cell-based therapies, the ANOVA Stem Cell Secretome Therapy, in combination with conventional therapeutic measures, we offer a novel regenerative approach to treating Osteoarthritis. Our programs are one of a kind in Europe.
Recent evidence-based scientific research has shown that stem cell-based therapies are able to effectively modulate the immune responses of OA, regenerate lost nerve supply, differentiate into chondrocytes (the cells that produce cartilage), etc., and offer long lasting effects for treating OA, as compared to standard medications (like nonsteroidal anti-inflammatory drugs) which only temporarily mask the symptoms.
For more information about our stem cell-based treatments for Osteoarthritis in Germany, please feel free to contact us. We are always here for you.
Then have a look at our Osteoarthritis Flyer.
Frequently Asked Questions: Stem Cell-based treatments
and Regenerative Therapies for Osteoarthritis
Osteoarthritis is mainly considered a cause of aging, where aging itself is a complicated process which is not entirely understood. Younger people sometimes get early osteoarthritis, primarily in the form of joint injuries or excessive strain.
Risk factors are:
- Joint injury
- Joints that are deformed
- Genetic defects related to joint cartilage
- Stress on the joints from certain jobs or sports
- Being overweight
- Getting older
Doctors often combine treatments that are optimized to fit a patient's needs, lifestyle, and health. Osteoarthritis treatment has four main goals:
- Control of pain
- Improve joint function
- Keep a healthy body weight
- Achieve a healthy lifestyle
Osteoarthritis treatment plans can involve:
- Weight control and diet, such as:
- Low saturated fat, high fiber-rich foods, fruits and vegetables. Some nutrition supplements appear to be helpful.
- Rest and joint care
- Nondrug pain relief techniques to control pain
- Complementary and alternative therapies
Bone Marrow concentrate (BMC) is a source for Mesenchymal Stem Cells (MSCs). It contains many important growth and regenerative factors, in addition to the Mesenchymal Stem Cells. The procedure is relatively simple and minimally invasive, therefore it has been a favourite source for stem cell-based therapies in the previous decades. Many groups rely on BMC as their main stem cell treatment, sometimes with exaggerated claims. However, BMC has demonstrated impressive results for effective treatment of numerous diseases, among them being osteoarthritis. Read more about our BMC Treatment here.
Platelet Rich Plasma (PRP) is a blood-derived, cellular product with concentrated supply of regenerative growth factors and cytokines, obtained from the patient's own blood. It is very simple to acquire, and it has shown promising results in the treatment of several inflammatory and degenerative diseases. For the treatment of specific diseases, it can be combined with BMC or adMSCs, as it has synergistic additive effects to the treatment. PRP has "special" functions: it serves as a growth medium to maintain stem cells healthy; ensures adequate cellular environment where enough energy is provided to allow the cells to perform their regenerative work. ANOVA Institute for Regenerative Medicine will soon offer PRP treatment.
MSC, BMC, Stem Cell Secretome and EVs
 Murphy JM, Fink DJ, Hunziker EB, et al. Stem cell therapy in a caprine model of osteoarthritis. Arthritis Rheum. 2003;48:3464–74.
 Lee KB, Hui JH, Song IC, Ardany L, et al. Injectable mesenchymal stem cell therapy for large cartilage defects—a porcine model. Stem Cell. 2007;25:2964–71.
 Saw KY, Hussin P, Loke SC, et al. Articular cartilage regeneration with autologous marrow aspirate and hyaluronic acid: an experimental study in a goat model. Arthroscopy. 2009;25(12):1391–400.
 Black L, Gaynor J, Adams C, et al. Effect of intra-articular injection of autologous adipose-derived mesenchymal stem and regenerative cells on clinical signs of chronic osteoarthritis of the elbow joint in dogs. Vet Ther. 2008;9:192-200.
 Centeno C, Busse D, Kisiday J, et al. Increased knee cartilage volume in degenerative joint disease using percutaneously implanted, autologous mesenchymal stem cells. Pain Physician. 2008;11(3):343–53.
 Centeno C, Kisiday J, Freeman M, et al. Partial regeneration of the human hip via autologous bone marrow nucleated cell transfer: a case study. Pain Physician. 2006;9:253–6.
 Centeno C, Schultz J, Cheever M. Safety and complications reporting on the re-implantation of culture-expanded mesenchymal stem cells using autologous platelet lysate technique. Curr Stem Cell. 2011;5(1):81–93.
 Pak J. Regeneration of human bones in hip osteonecrosis and human cartilage in knee osteoarthritis with autologous adipose derived stem cells: a case series. J Med Case Rep. 2001;5:296.
 Kuroda R, Ishida K, et al. Treatment of a full-thickness articular cartilage defect in the femoral condyle of an athlete with autologous bone-marrow stromal cells. Osteoarthritis Cartilage. 2007;15:226–31.
 Emadedin M, Aghdami N, Taghiyar L, et al. Intra-articular injection of autologous mesenchymal stem cells in six patients with knee osteoarthritis. Arch Iran Med. 2012;15(7):422–8.
 Saw KY et al. Articular cartilage regeneration with autologous peripheral blood stem cells versus hyaluronic acid: a randomized controlled trial. Arthroscopy. 2013;29(4):684–94.
 Vangsness CT, Farr J, Boyd J, et al. Adult human mesenchymal stem cells delivered via intra-articular injection to the knee following partial medial meniscectomy. J Bone Joint Surg. 2014;96(2):90–8.
 Freitag, Julien, et al. "Mesenchymal stem cell therapy in the treatment of osteoarthritis: reparative pathways, safety and efficacy–a review." BMC musculoskeletal disorders 17.1 (2016): 230.
 Maumus, Marie, Christian Jorgensen, and Danièle Noël. "Mesenchymal stem cells in regenerative medicine applied to rheumatic diseases: role of secretome and exosomes." Biochimie 95.12 (2013): 2229-2234.
 Dostert, Gabriel, et al. "How do mesenchymal stem cells influence or are influenced by microenvironment through extracellular vesicles communication?." Frontiers in Cell and Developmental Biology 5 (2017).
 Dostert, Gabriel, et al. "How do mesenchymal stem cells influence or are influenced by microenvironment through extracellular vesicles communication?." Frontiers in Cell and Developmental Biology 5 (2017).
 Chaparro, Orlando, and Itali Linero. "Regenerative Medicine: A New Paradigm in Bone Regeneration." (2016).
 Toh, Wei Seong, et al. "MSC exosome as a cell-free MSC therapy for cartilage regeneration: Implications for osteoarthritis treatment." Seminars in Cell & Developmental Biology. Academic Press, 2016.
Chaparro, Orlando, and Itali Linero. "Regenerative Medicine: A New Paradigm in Bone Regeneration." (2016).
 S. Koelling, J. Kruegel, M. Irmer, J.R. Path, B. Sadowski, X. Miro, et al., Migratory chondrogenic progenitor cells from repair tissue during the later stages of human osteoarthritis, Cell Stem Cell 4 (2009) 324–335.
 B.A. Jones, M. Pei, Synovium-Derived stem cells: a tissue-Specific stem cell for cartilage engineering and regeneration, Tissue Eng. B: Rev. 18 (2012) 301–311.
 W. Ando, J.J. Kutcher, R. Krawetz, A. Sen, N. Nakamura, C.B. Frank, et al., Clonal analysis of synovial fluid stem cells to characterize and identify stable mesenchymal stromal cell/mesenchymal progenitor cell phenotypes in a porcine model: a cell source with enhanced commitment to the chondrogenic lineage, Cytotherapy 16 (2014) 776–788.
 K.B.L. Lee, J.H.P. Hui, I.C. Song, L. Ardany, E.H. Lee, Injectable mesenchymal stem cell therapy for large cartilage defects—a porcine model, Stem Cells 25 (2007) 2964–2971.
 W.-L. Fu, C.-Y. Zhou, J.-K. Yu, A new source of mesenchymal stem cells for articular cartilage repair: mSCs derived from mobilized peripheral blood share similar biological characteristics in vitro and chondrogenesis in vivo as MSCs from bone marrow in a rabbit model, Am. J. Sports Med. 42 (2014) 592–601.
 X. Xie, Y. Wang, C. Zhao, S. Guo, S. Liu, W. Jia, et al., Comparative evaluation of MSCs from bone marrow and adipose tissue seeded in PRP-derived scaffold for cartilage regeneration, Biomaterials 33 (2012) 7008–7018.
 E.-R. Chiang, H.-L. Ma, J.-P. Wang, C.-L. Liu, T.-H. Chen, S.-C. Hung, Allogeneic mesenchymal stem cells in combination with hyaluronic acid for the treatment of osteoarthritis in rabbits, PLoS One 11 (2016) e0149835.
 H. Nejadnik, J.H. Hui, E.P. Feng Choong, B.-C. Tai, E.H. Lee, Autologous bone marrow–derived mesenchymal stem cells versus autologous chondrocyte implantation: an observational cohort study, Am. J. Sports Med. 38 (2010) 1110–1116.
 I. Sekiya, T. Muneta, M. Horie, H. Koga, Arthroscopic transplantation of synovial stem cells improves clinical outcomes in knees with cartilage defects, Clin. Orthop. Rel. Res. 473 (2015) 2316–2326.
 Y.S. Kim, Y.J. Choi, Y.G. Koh, Mesenchymal stem cell implantation in knee osteoarthritis: an assessment of the factors influencing clinical outcomes, Am. J. Sports Med. 43 (2015) 2293–2301.
 W.-L. Fu, Y.-F. Ao, X.-Y. Ke, Z.-Z. Zheng, X. Gong, D. Jiang, et al., Repair of large full-thickness cartilage defect by activating endogenous peripheral blood stem cells and autologous periosteum flap transplantation combined with patellofemoral realignment, Knee 21 (2014) 609–612.
 Y.-G. Koh, O.-R. Kwon, Y.-S. Kim, Y.-J. Choi, D.-H. Tak, Adipose-derived mesenchymal stem cells with microfracture versus microfracture alone: 2-year follow-up of a prospective randomized trial, Arthrosc. J. Arthrosc. Relat. Surg. 32 (2016) 97–109.
 T.S. de Windt, L.A. Vonk, I.C.M. Slaper-Cortenbach, M.P.H. van den Broek, R. Nizak, M.H.P. van Rijen, et al., Allogeneic mesenchymal stem cells stimulate cartilage regeneration and are safe for single-Stage cartilage repair in humans upon mixture with recycled autologous chondrons, Stem Cells (2016) (n/a-n/a).
 L. da Silva Meirelles, A.M. Fontes, D.T. Covas, A.I. Caplan, Mechanisms involved in the therapeutic properties of mesenchymal stem cells, Cytokine Growth Factor Rev. 20 (2009) 419–427.
 W.S. Toh, C.B. Foldager, M. Pei, J.H.P. Hui, Advances in mesenchymal stem cell-based strategies for cartilage repair and regeneration, Stem Cell Rev. Rep. 10 (2014) 686–696.
 R.C. Lai, F. Arslan, M.M. Lee, N.S.K. Sze, A. Choo, T.S. Chen, et al., Exosome secreted by MSC reduces myocardial ischemia/reperfusion injury, Stem Cell Res. 4 (2010) 214–222.
 S. Zhang, W.C. Chu, R.C. Lai, S.K. Lim, J.H.P. Hui, W.S. Toh, Exosomes derived from human embryonic mesenchymal stem cells promote osteochondral regeneration, Osteoarthr. Cartil. 24 (2016) 2135–2140.
 S. Zhang, W. Chu, R. Lai, J. Hui, E. Lee, S. Lim, et al., 21 – human mesenchymal stem cell-derived exosomes promote orderly cartilage regeneration in an immunocompetent rat osteochondral defect model, Cytotherapy 18 (2016) S13.
 C.T. Lim, X. Ren, M.H. Afizah, S. Tarigan-Panjaitan, Z. Yang, Y. Wu, et al., Repair of osteochondral defects with rehydrated freeze-Ddried oligo
[poly(ethylene glycol) fumarate] hydrogels seeded with bone marrow mesenchymal stem cells in a porcine model, Tissue Eng. A 19 (2013) 1852–1861.
 A. Gobbi, G. Karnatzikos, S.R. Sankineani, One-step surgery with multipotent stem cells for the treatment of large full-thickness chondral defects of the knee, Am. J. Sports Med. 42 (2014) 648–657.
 A. Gobbi, C. Scotti, G. Karnatzikos, A. Mudhigere, M. Castro, G.M. Peretti, One-step surgery with multipotent stem cells and Hyaluronan-based scaffold for the treatment of full-thickness chondral defects of the knee in patients older than 45 years, Knee Surg. Sports Traumatol. Arthrosc. (2016) 1–8.
 A. Gobbi, G. Karnatzikos, C. Scotti, V. Mahajan, L. Mazzucco, B. Grigolo, One-step cartilage repair with bone marrow aspirate concentrated cells and collagen matrix in full-thickness knee cartilage lesions: results at 2-Year follow-up, Cartilage 2 (2011) 286–299.
 K.L. Wong, K.B.L. Lee, B.C. Tai, P. Law, E.H. Lee, J.H.P. Hui, Injectable cultured bone marrow-derived mesenchymal stem cells in varus knees with cartilage defects undergoing high tibial osteotomy: a prospective, randomized controlled clinical trial with 2 years’ follow-up, Arthrosc. J. Arthrosc. Relat. Surg. 29 (2013) 2020–2028.
 J.M. Hare, J.E. Fishman, G. Gerstenblith, et al., Comparison of allogeneic vs autologous bone marrow–derived mesenchymal stem cells delivered by transendocardial injection in patients with ischemic cardiomyopathy: the poseidon randomized trial, JAMA 308 (2012) 2369–2379.
 L. Wu, J.C.H. Leijten, N. Georgi, J.N. Post, C.A. van Blitterswijk, M. Karperien, Trophic effects of mesenchymal stem cells increase chondrocyte proliferation and matrix formation, Tissue Eng. A 17 (2011) 1425–1436.
 L. Wu, H.-J. Prins, M.N. Helder, C.A. van Blitterswijk, M. Karperien, Trophic effects of mesenchymal stem cells in chondrocyte Co-Cultures are independent of culture conditions and cell sources, Tissue Eng. A 18 (2012) 1542–1551.
 S.K. Sze, D.P.V. de Kleijn, R.C. Lai, E. Khia Way Tan, H. Zhao, K.S. Yeo, et al., Elucidating the secretion proteome of human embryonic stem cell-derived mesenchymal stem cells, Mol. Cell. Proteomics 6 (2007) 1680–1689.
 M.B. Murphy, K. Moncivais, A.I. Caplan, Mesenchymal stem cells: environmentally responsive therapeutics for regenerative medicine, Exp. Mol. Med. 45 (2013) e54.
 M.J. Lee, J. Kim, M.Y. Kim, Y.-S. Bae, S.H. Ryu, T.G. Lee, et al., Proteomic analysis of tumor necrosis factor--induced secretome of human adipose tissue-derived mesenchymal stem cells, J. Proteome Res. 9 (2010) 1754–1762.
 S. Bruno, C. Grange, M.C. Deregibus, R.A. Calogero, S. Saviozzi, F. Collino, et al., Mesenchymal stem cell-derived microvesicles protect against acute tubular injury, J. Am. Soc. Nephrol. 20 (2009) 1053–1067.
 M. Yá˜nez-Mó, P.R.-M. Siljander, Z. Andreu, A.B. Zavec, F.E. Borràs, E.I. Buzas, et al. Biological properties of extracellular vesicles and their physiological functions (2015).
 C. Lawson, J.M. Vicencio, D.M. Yellon, S.M. Davidson, Microvesicles and exosomes: new players in metabolic and cardiovascular disease, J. Endocrinol. 228 (2016) R57–R71.
 A.G. Thompson, E. Gray, S.M. Heman-Ackah, I. Mager, K. Talbot, S.E. Andaloussi, et al., Extracellular vesicles in neurodegenerative diseas—pathogenesis to biomarkers, Nat. Rev. Neurol. 12 (2016) 346–357.
 I.E.M. Bank, L. Timmers, C.M. Gijsberts, Y.-N. Zhang, A. Mosterd, J.-W. Wang, et al., The diagnostic and prognostic potential of plasma extracellular vesicles for cardiovascular disease, Expert Rev. Mol. Diagn. 15 (2015) 1577–1588.
 T. Kato, S. Miyaki, H. Ishitobi, Y. Nakamura, T. Nakasa, M.K. Lotz, et al., Exosomes from IL-1 stimulated synovial fibroblasts induce osteoarthritic changes in articular chondrocytes, Arthritis. Res. Ther. 16 (2014) 1–11.
 R.W.Y. Yeo, S.K. Lim, Exosomes and their therapeutic applications, in: C. Gunther, A. Hauser, R. Huss (Eds.), Advances in Pharmaceutical Cell TherapyPrinciples of Cell-Based Biopharmaceuticals, World Scientific, Singapore, 2015, pp. 477–491.
 X. Qi, J. Zhang, H. Yuan, Z. Xu, Q. Li, X. Niu, et al., Exosomes secreted by human-Induced pluripotent stem cell-derived mesenchymal stem cells repair critical-sized bone defects through enhanced angiogenesis and osteogenesis in osteoporotic rats, Int. J. Biol. Sci. 12 (2016) 836–849.
 R.C. Lai, F. Arslan, S.S. Tan, B. Tan, A. Choo, M.M. Lee, et al., Derivation and characterization of human fetal MSCs: an alternative cell source for large-scale production of cardioprotective microparticles, J. Mol. Cell. Cardiol. 48 (2010) 1215–1224.
 Y. Zhou, H. Xu, W. Xu, B. Wang, H. Wu, Y. Tao, et al., Exosomes released by human umbilical cord mesenchymal stem cells protect against cisplatin-induced renal oxidative stress and apoptosis in vivo and in vitro, Stem Cell Res. Ther. 4 (2013) 1–13.
 Y. Qin, L. Wang, Z. Gao, G. Chen, C. Zhang, Bone marrow stromal/stem cell-derived extracellular vesicles regulate osteoblast activity and differentiation in vitro and promote bone regeneration in vivo, Sci. Rep. 6 (2016) 21961.
 M. Nakano, K. Nagaishi, N. Konari, Y. Saito, T. Chikenji, Y. Mizue, et al., Bone marrow-derived mesenchymal stem cells improve diabetes-induced cognitive impairment by exosome transfer into damaged neurons and astrocytes, Sci. Rep. 6 (2016) 24805.
 K. Nagaishi, Y. Mizue, T. Chikenji, M. Otani, M. Nakano, N. Konari, et al., Mesenchymal stem cell therapy ameliorates diabetic nephropathy via the paracrine effect of renal trophic factors including exosomes, Sci. Rep. 6 (2016) 34842.
 S.R. Baglio, K. Rooijers, D. Koppers-Lalic, F.J. Verweij, M. Pérez Lanzón, N. Zini, et al., Human bone marrow- and adipose-mesenchymal stem cells secrete exosomes enriched in distinctive miRNA and tRNA species, Stem Cell Res. Ther. 6 (2015) 1–20.
 T. Chen, R. Yeo, F. Arslan, Y. Yin, S. Tan, Efficiency of exosome production correlates inversely with the developmental maturity of MSC donor, J. Stem Cell Res. Ther. 3 (2013) 2.
 R.C. Lai, S.S. Tan, B.J. Teh, S.K. Sze, F. Arslan, D.P. de Kleijn, et al., Proteolytic potential of the MSC exosome proteome: implications for an exosome-mediated delivery of therapeutic proteasome, Int. J. Proteomics 2012 (2012) 971907.
 T.S. Chen, R.C. Lai, M.M. Lee, A.B.H. Choo, C.N. Lee, S.K. Lim, Mesenchymal stem cell secretes microparticles enriched in pre-microRNAs, Nucleic Acids Res. 38 (2010) 215–224.
 R.W. Yeo, R.C. Lai, K.H. Tan, S.K. Lim, Exosome: a novel and safer therapeutic refinement of mesenchymal stem cell, J. Circ. Biomark. 1 (2013) 7.
 R.C. Lai, R.W. Yeo, S.K. Lim, Mesenchymal stem cell exosomes, Semin. Cell Dev. Biol. 40 (2015) 82–88.
 B. Zhang, R.W. Yeo, K.H. Tan, S.K. Lim, Focus on extracellular vesicles: therapeutic potential of stem cell-derived extracellular vesicles, Int. J. Mol. Sci. 17 (2016) 174.
 Hu G-w, Q. Li, X. Niu, B. Hu, J. Liu, Zhou S-m, et al., Exosomes secreted by human-induced pluripotent stem cell-derived mesenchymal stem cells attenuate limb ischemia by promoting angiogenesis in mice, Stem Cell Res. Ther. 6 (2015) 1–15.
 J. Zhang, J. Guan, X. Niu, G. Hu, S. Guo, Q. Li, et al., Exosomes released from human induced pluripotent stem cells-derived MSCs facilitate cutaneous wound healing by promoting collagen synthesis and angiogenesis, J. Transl. Med. 13 (2015) 1–14.
 B. Zhang, M. Wang, A. Gong, X. Zhang, X. Wu, Y. Zhu, et al., HucMSC-exosome mediated-Wnt4 signaling is required for cutaneous wound healing, Stem Cells 33 (2015) 2158–2168.
 B. Zhang, Y. Yin, R.C. Lai, S.S. Tan, A.B.H. Choo, S.K. Lim, Mesenchymal stem cells secrete immunologically active exosomes, Stem Cells Dev. 23 (2013) 1233–1244.
 C.Y. Tan, R.C. Lai, W. Wong, Y.Y. Dan, S.-K. Lim, H.K. Ho, Mesenchymal stem cell-derived exosomes promote hepatic regeneration in drug-induced liver injury models, Stem Cell Res. Ther. 5 (2014) 1–14.
 C. Lee, S.A. Mitsialis, M. Aslam, S.H. Vitali, E. Vergadi, G. Konstantinou, et al., Exosomes mediate the cytoprotective action of mesenchymal stromal cells on hypoxia-induced pulmonary hypertension, Circulation 126 (2012) 2601–2611.
 B. Yu, H. Shao, C. Su, Y. Jiang, X. Chen, L. Bai, et al., Exosomes derived from MSCs ameliorate retinal laser injury partially by inhibition of MCP-1, Sci. Rep. 6 (2016) 34562.
 Jo CH, Lee YG, Shin WH, et al. Intra-articular injection of mesenchymal stem cells for the treatment of osteoarthritis of the knee: a proof of concept clinical trial. Stem Cells. 2014;32(5):1254–66.
 Vega, Aurelio, et al. Treatment of knee osteoarthritis with allogeneic bone marrow mesenchymal stem cells: a randomized controlled trial. Transplantation. 2015;99(8):1681–90.
 Davatchi F, Sadeghi-Abdollahi B, Mohyeddin M, et al. Mesenchymal stem cell therapy for knee osteoarthritis. Preliminary report of four patients. Int J Rheum Dis. 2011;14(2):211–5
 Hernigou P, Flouzat Lachaniette CH, Delambre J, et al. Biologic augmentation of rotator cuff repair with mesenchymal stem cells during arthroscopy improves healing and prevents further tears: a case- controlled study. Int Orthop. 2014;38(9):1811–1818
 Galli D, Vitale M, Vaccarezza M. Bone marrow-derived mesenchymal cell differentiation toward myogenic lineages: facts and perspectives. Biomed Res Int. 2014;2014:6.
 Beitzel K, Solovyova O, Cote MP, et al. The future role of mesenchymal Stem cells in The management of shoulder disorders. Arthroscopy. 2013;29(10):1702–1711.
 Isaac C, Gharaibeh B, Witt M, Wright VJ, Huard J. Biologic approaches to enhance rotator cuff healing after injury. J Shoulder Elbow Surg. 2012;21(2):181–190.
Malda, Jos, et al. "Extracellular vesicles [mdash] new tool for joint repair and regeneration." Nature Reviews Rheumatology (2016).
Rubio-Azpeitia E, Andia I. Partnership between platelet-rich plasma and mesenchymal stem cells: in vitro experience. Muscles Ligaments Tendons J. 2014;4(1):52–62.
Xu, Ming, et al. "Transplanted senescent cells induce an osteoarthritis-like condition in mice." The Journals of Gerontology Series A: Biological Sciences and Medical Sciences (2016): glw154.
McCulloch, Kendal, Gary J. Litherland, and Taranjit Singh Rai. "Cellular senescence in osteoarthritis pathology." Aging Cell (2017).