J Yeungnam Med Sci.  2022 Jul;39(3):206-215. 10.12701/jyms.2022.00290.

The use of platelet-rich plasma in management of musculoskeletal pain: a narrative review

Affiliations
  • 1Department of Physical Medicine and Rehabilitation, University of Medicine, Mandalay, Myanmar

Abstract

Musculoskeletal pain is the most common pain reported by patients. Platelet-rich plasma (PRP) is widely used to treat musculoskeletal pain. However, the efficacy of PRP to treat this pain remains controversial. This review highlights the application of PRP in the treatment of musculoskeletal pain. PRP treatment appears to reduce pain and improve function in patients with musculoskeletal pain. However, there are limitations to the currently published studies. These limitations include the PRP preparation methods, type of activators, types of pathology to be treated, methods and times of administration, and association of PRP with other treatments.

Keyword

Humans; Musculoskeletal pain; Pain management; Platelet-rich plasma

Cited by  1 articles

The blind spot and challenges in pain management
Min Cheol Chang
J Yeungnam Med Sci. 2022;39(3):179-180.    doi: 10.12701/jyms.2022.00339.


Reference

References

1. Casser HR, Schaible HG. Musculoskeletal pain. Schmerz. 2015; 29:486–8. 490–5.
2. Woolf AD, Pfleger B. Burden of major musculoskeletal conditions. Bull World Health Organ. 2003; 81:646–56.
3. Marks R. Qigong and musculoskeletal pain. Curr Rheumatol Rep. 2019; 21:59.
Article
4. Hawker GA. The assessment of musculoskeletal pain. Clin Exp Rheumatol. 2017; 35(5 Suppl 107):8–12.
5. Sepúlveda F, Baerga L, Micheo W. The role of physiatry in regenerative medicine: the past, the present, and future challenges. PM R. 2015; 7(4 Suppl):S76–80.
Article
6. Middleton KK, Barro V, Muller B, Terada S, Fu FH. Evaluation of the effects of platelet-rich plasma (PRP) therapy involved in the healing of sports-related soft tissue injuries. Iowa Orthop J. 2012; 32:150–63.
7. Alves R, Grimalt R. A review of platelet-rich plasma: history, biology, mechanism of action, and classification. Skin Appendage Disord. 2018; 4:18–24.
Article
8. Bos-Mikich A, de Oliveira R, Frantz N. Platelet-rich plasma therapy and reproductive medicine. J Assist Reprod Genet. 2018; 35:753–6.
Article
9. Alves R, Grimalt R. Randomized placebo-controlled, double-blind, half-head study to assess the efficacy of platelet-rich plasma on the treatment of androgenetic alopecia. Dermatol Surg. 2016; 42:491–7.
Article
10. Cao Y, Zhu X, Zhou R, He Y, Wu Z, Chen Y. A narrative review of the research progress and clinical application of platelet-rich plasma. Ann Palliat Med. 2021; 10:4823–9.
Article
11. Everts P, Onishi K, Jayaram P, Lana JF, Mautner K. Platelet-rich plasma: new performance understandings and therapeutic considerations in 2020. Int J Mol Sci. 2020; 21:7794.
Article
12. Linden MD. Platelet physiology. Methods Mol Biol. 2013; 992:13–30.
Article
13. Xie X, Zhang C, Tuan RS. Biology of platelet-rich plasma and its clinical application in cartilage repair. Arthritis Res Ther. 2014; 16:204.
Article
14. Wu CC, Chen WH, Zao B, Lai PL, Lin TC, Lo HY, et al. Regenerative potentials of platelet-rich plasma enhanced by collagen in retrieving pro-inflammatory cytokine-inhibited chondrogenesis. Biomaterials. 2011; 32:5847–54.
Article
15. Bendinelli P, Matteucci E, Dogliotti G, Corsi MM, Banfi G, Maroni P, et al. Molecular basis of anti-inflammatory action of platelet-rich plasma on human chondrocytes: mechanisms of NF-κB inhibition via HGF. J Cell Physiol. 2010; 225:757–66.
Article
16. Solakoglu Ö, Heydecke G, Amiri N, Anitua E. The use of plasma rich in growth factors (PRGF) in guided tissue regeneration and guided bone regeneration: a review of histological, immunohistochemical, histomorphometrical, radiological and clinical results in humans. Ann Anat. 2020; 231:151528.
Article
17. Gautam VK, Verma S, Batra S, Bhatnagar N, Arora S. Platelet-rich plasma versus corticosteroid injection for recalcitrant lateral epicondylitis: clinical and ultrasonographic evaluation. J Orthop Surg (Hong Kong). 2015; 23:1–5.
Article
18. Kaushik A, Kumaran MS. Platelet-rich plasma: the journey so far! Indian Dermatol Online J. 2020; 11:685–92.
19. Dhillon RS, Schwarz EM, Maloney MD. Platelet-rich plasma therapy: future or trend? Arthritis Res Ther. 2012; 14:219.
20. Cross M, Smith E, Hoy D, Nolte S, Ackerman I, Fransen M, et al. The global burden of hip and knee osteoarthritis: estimates from the global burden of disease 2010 study. Ann Rheum Dis. 2014; 73:1323–30.
Article
21. Bliddal H. Definition, pathology and pathogenesis of osteoarthritis. Ugeskr Laeger. 2020; 182:V06200477.
22. Block JA, Cherny D. Management of knee osteoarthritis: what internists need to know. Med Clin North Am. 2021; 105:367–85.
23. Cugat R, Cuscó X, Seijas R, Álvarez P, Steinbacher G, Ares O, et al. Biologic enhancement of cartilage repair: the role of platelet-rich plasma and other commercially available growth factors. Arthroscopy. 2015; 31:777–83.
Article
24. Anitua E, Sánchez M, Nurden AT, Zalduendo MM, de la Fuente M, Azofra J, et al. Platelet-released growth factors enhance the secretion of hyaluronic acid and induce hepatocyte growth factor production by synovial fibroblasts from arthritic patients. Rheumatology (Oxford). 2007; 46:1769–72.
Article
25. Sun SF, Lin GC, Hsu CW, Lin HS, Liou IS, Wu SY. Comparing efficacy of intraarticular single crosslinked Hyaluronan (HYAJOINT Plus) and platelet-rich plasma (PRP) versus PRP alone for treating knee osteoarthritis. Sci Rep. 2021; 11:140.
Article
26. Cook CS, Smith PA. Clinical update: why PRP should be your first choice for injection therapy in treating osteoarthritis of the knee. Curr Rev Musculoskelet Med. 2018; 11:583–92.
Article
27. Shen L, Yuan T, Chen S, Xie X, Zhang C. The temporal effect of platelet-rich plasma on pain and physical function in the treatment of knee osteoarthritis: systematic review and meta-analysis of randomized controlled trials. J Orthop Surg Res. 2017; 12:16.
Article
28. Belk JW, Kraeutler MJ, Houck DA, Goodrich JA, Dragoo JL, McCarty EC. Platelet-rich plasma versus hyaluronic acid for knee osteoarthritis: a systematic review and meta-analysis of randomized controlled trials. Am J Sports Med. 2021; 49:249–60.
Article
29. Zhao J, Huang H, Liang G, Zeng LF, Yang W, Liu J. Effects and safety of the combination of platelet-rich plasma (PRP) and hyaluronic acid (HA) in the treatment of knee osteoarthritis: a systematic review and meta-analysis. BMC Musculoskelet Disord. 2020; 21:224.
Article
30. McLarnon M, Heron N. Intra-articular platelet-rich plasma injections versus intra-articular corticosteroid injections for symptomatic management of knee osteoarthritis: systematic review and meta-analysis. BMC Musculoskelet Disord. 2021; 22:550.
Article
31. Repetto I, Biti B, Cerruti P, Trentini R, Felli L. Conservative treatment of ankle osteoarthritis: can platelet-rich plasma effectively postpone surgery? J Foot Ankle Surg. 2017; 56:362–5.
Article
32. Paget LD, Reurink G, de Vos RJ, Weir A, Moen MH, Bierma-Zeinstra SM, et al. Effect of platelet-rich plasma injections vs placebo on ankle symptoms and function in patients with ankle osteoarthritis: a randomized clinical trial. JAMA. 2021; 326:1595–605.
Article
33. Godoy-Santos AL, Fonseca LF, de Cesar Netto C, Giordano V, Valderrabano V, Rammelt S. Ankle osteoarthritis. Rev Bras Ortop (Sao Paulo). 2020; 56:689–96.
34. Vannabouathong C, Del Fabbro G, Sales B, Smith C, Li CS, Yardley D, et al. Intra-articular injections in the treatment of symptoms from ankle arthritis: a systematic review. Foot Ankle Int. 2018; 39:1141–50.
Article
35. Derwich M, Mitus-Kenig M, Pawlowska E. Interdisciplinary approach to the temporomandibular joint osteoarthritis-review of the literature. Medicina (Kaunas). 2020; 56:225.
Article
36. Zotti F, Albanese M, Rodella LF, Nocini PF. Platelet-rich plasma in treatment of temporomandibular joint dysfunctions: narrative review. Int J Mol Sci. 2019; 20:277.
Article
37. Li FL, Wu CB, Sun HJ, Zhou Q. Comparison of autologous platelet-rich plasma and chitosan in the treatment of temporomandibular joint osteoarthritis: a retrospective cohort study. J Oral Maxillofac Surg. 2021; 79:324–32.
Article
38. Sousa BM, López-Valverde N, López-Valverde A, Caramelo F, Fraile JF, Payo JH, et al. Different treatments in patients with temporomandibular joint disorders: a comparative randomized study. Medicina (Kaunas). 2020; 56:113.
Article
39. Bousnaki M, Bakopoulou A, Koidis P. Platelet-rich plasma for the therapeutic management of temporomandibular joint disorders: a systematic review. Int J Oral Maxillofac Surg. 2018; 47:188–98.
Article
40. Haigler MC, Abdulrehman E, Siddappa S, Kishore R, Padilla M, Enciso R. Use of platelet-rich plasma, platelet-rich growth factor with arthrocentesis or arthroscopy to treat temporomandibular joint osteoarthritis: systematic review with meta-analyses. J Am Dent Assoc. 2018; 149:940–52.
41. Knezevic NN, Candido KD, Vlaeyen JW, Van Zundert J, Cohen SP. Low back pain. Lancet. 2021; 398:78–92.
Article
42. Chou R. Low back pain. Ann Intern Med. 2021; 174:ITC113-28.
Article
43. Xuan Z, Yu W, Dou Y, Wang T. Efficacy of platelet-rich plasma for low back pain: a systematic review and meta-analysis. J Neurol Surg A Cent Eur Neurosurg. 2020; 81:529–34.
Article
44. Sanapati J, Manchikanti L, Atluri S, Jordan S, Albers SL, Pappolla MA, et al. Do regenerative medicine therapies provide long-term relief in chronic low back pain: a systematic review and metaanalysis. Pain Physician. 2018; 21:515–40.
45. Schneider BJ, Hunt C, Conger A, Qu W, Maus TP, Vorobeychik Y, et al. The effectiveness of intradiscal biologic treatments for discogenic low back pain: a systematic review. Spine J. 2022; 22:226–37.
Article
46. Jain D, Goyal T, Verma N, Paswan AK, Dubey RK. Intradiscal platelet-rich plasma injection for discogenic low back pain and correlation with platelet concentration: a prospective clinical trial. Pain Med. 2020; 21:2719–25.
Article
47. Baig MZ, Abdullah UE, Muhammad A, Aziz A, Syed MJ, Darbar A. Use of platelet-rich plasma in treating low back pain: a review of the current literature. Asian Spine J. 2021; 15:117–26.
Article
48. Urits I, Viswanath O, Galasso AC, Sottosani ER, Mahan KM, Aiudi CM, et al. Platelet-rich plasma for the treatment of low back pain: a comprehensive review. Curr Pain Headache Rep. 2019; 23:52.
Article
49. Wu J, Zhou J, Liu C, Zhang J, Xiong W, Lv Y, et al. A prospective study comparing platelet-rich plasma and local anesthetic (LA)/corticosteroid in intra-articular injection for the treatment of lumbar facet joint syndrome. Pain Pract. 2017; 17:914–24.
Article
50. Mohammed S, Yu J. Platelet-rich plasma injections: an emerging therapy for chronic discogenic low back pain. J Spine Surg. 2018; 4:115–22.
Article
51. Nowak Z, Chęciński M, Nitecka-Buchta A, Bulanda S, Ilczuk-Rypuła D, Postek-Stefańska L, et al. Intramuscular injections and dry needling within masticatory muscles in management of myofascial pain: systematic review of clinical trials. Int J Environ Res Public Health. 2021; 18:9552.
Article
52. Sakalys D, Rokicki JP, Januzis G, Kubilius R. Plasma rich in growth factors injection effectiveness for myofascial pain treatment in masticatory muscles: randomised controlled trial. J Oral Rehabil. 2020; 47:796–801.
Article
53. Yilmaz O, Sivrikaya EC, Taskesen F, Pirpir C, Ciftci S. Comparison of the efficacy of botulinum toxin, local anesthesia, and platelet-rich plasma injections in patients with myofascial trigger points in the masseter muscle. J Oral Maxillofac Surg. 2021; 79:88.
Article
54. Scott A, Docking S, Vicenzino B, Alfredson H, Murphy RJ, Carr AJ, et al. Sports and exercise-related tendinopathies: a review of selected topical issues by participants of the second International Scientific Tendinopathy Symposium (ISTS) Vancouver 2012. Br J Sports Med. 2013; 47:536–44.
Article
55. Li A, Wang H, Yu Z, Zhang G, Feng S, Liu L, et al. Platelet-rich plasma vs corticosteroids for elbow epicondylitis: a systematic review and meta-analysis. Medicine (Baltimore). 2019; 98:e18358.
56. Arirachakaran A, Sukthuayat A, Sisayanarane T, Laoratanavoraphong S, Kanchanatawan W, Kongtharvonskul J. Platelet-rich plasma versus autologous blood versus steroid injection in lateral epicondylitis: systematic review and network meta-analysis. J Orthop Traumatol. 2016; 17:101–12.
Article
57. Tosti R, Jennings J, Sewards JM. Lateral epicondylitis of the elbow. Am J Med. 2013; 126:357.
Article
58. Hardy R, Tori A, Fuchs H, Larson T, Brand J, Monroe E. To improve pain and function, platelet-rich plasma injections may be an alternative to surgery for treating lateral epicondylitis: a systematic review. Arthroscopy. 2021; 37:3360–7.
Article
59. Galatz LM, Gerstenfeld L, Heber-Katz E, Rodeo SA. Tendon regeneration and scar formation: the concept of scarless healing. J Orthop Res. 2015; 33:823–31.
Article
60. Chen XT, Fang W, Jones IA, Heckmann ND, Park C, Vangsness CT Jr. The efficacy of platelet-rich plasma for improving pain and function in lateral epicondylitis: a systematic review and meta-analysis with risk-of-bias assessment. Arthroscopy. 2021; 37:2937–52.
61. Varshney A, Maheshwari R, Juyal A, Agrawal A, Hayer P. Autologous platelet-rich plasma versus corticosteroid in the management of elbow epicondylitis: a randomized study. Int J Appl Basic Med Res. 2017; 7:125–8.
Article
62. Kemp JA, Olson MA, Tao MA, Burcal CJ. Platelet-rich plasma versus corticosteroid injection for the treatment of lateral epicondylitis: a systematic review of systematic reviews. Int J Sports Phys Ther. 2021; 16:597–605.
Article
63. Muthu S, Patel S, Selvaraj P, Jeyaraman M. Comparative analysis of leucocyte poor vs leucocyte rich platelet-rich plasma in the management of lateral epicondylitis: systematic review & meta-analysis of randomised controlled trials. J Clin Orthop Trauma. 2021; 19:96–107.
Article
64. Simental-Mendía M, Vilchez-Cavazos F, Álvarez-Villalobos N, Blázquez-Saldaña J, Peña-Martínez V, Villarreal-Villarreal G, et al. Clinical efficacy of platelet-rich plasma in the treatment of lateral epicondylitis: a systematic review and meta-analysis of randomized placebo-controlled clinical trials. Clin Rheumatol. 2020; 39:2255–65.
Article
65. Chen X, Jones IA, Park C, Vangsness CT Jr. The efficacy of platelet-rich plasma on tendon and ligament healing: a systematic review and meta-analysis with bias assessment. Am J Sports Med. 2018; 46:2020–32.
Article
66. Ling Y, Wang S. Effects of platelet-rich plasma in the treatment of plantar fasciitis: a meta-analysis of randomized controlled trials. Medicine (Baltimore). 2018; 97:e12110.
67. Hurley ET, Shimozono Y, Hannon CP, Smyth NA, Murawski CD, Kennedy JG. Platelet-rich plasma versus corticosteroids for plantar fasciitis: a systematic review of randomized controlled trials. Orthop J Sports Med. 2020; 8:2325967120915704.
Article
68. Hosny N, Goubran F, BadrEldin Hasan B, Kamel N. Assessment of vascular endothelial growth factor in fresh versus frozen platelet rich plasma. J Blood Transfus. 2015; 2015:706903.
Article
69. Alkhatib N, Salameh M, Ahmed AF, Alkaramany E, Ahmed G, Mekhaimar MM, et al. Platelet-rich plasma versus corticosteroids in the treatment of chronic plantar fasciitis: a systematic review and meta-analysis of prospective comparative studies. J Foot Ankle Surg. 2020; 59:546–52.
Article
70. Fei X, Lang L, Lingjiao H, Wei C, Zhou X. Platelet-rich plasma has better mid-term clinical results than traditional steroid injection for plantar fasciitis: a systematic review and meta-analysis. Orthop Traumatol Surg Res. 2021; 107:103007.
Article
71. Chiew SK, Ramasamy TS, Amini F. Effectiveness and relevant factors of platelet-rich plasma treatment in managing plantar fasciitis: a systematic review. J Res Med Sci. 2016; 21:38.
Article
72. Christian RA, Rossy WH, Sherman OH. Patellar tendinopathy: recent developments toward treatment. Bull Hosp Jt Dis (2013). 2014; 72:217–24.
73. Liddle AD, Rodríguez-Merchán EC. Platelet-rich plasma in the treatment of patellar tendinopathy: a systematic review. Am J Sports Med. 2015; 43:2583–90.
Article
74. Kon E, Filardo G, Di Martino A, Marcacci M. Platelet-rich plasma (PRP) to treat sports injuries: evidence to support its use. Knee Surg Sports Traumatol Arthrosc. 2011; 19:516–27.
Article
75. Tschon M, Fini M, Giardino R, Filardo G, Dallari D, Torricelli P, et al. Lights and shadows concerning platelet products for musculoskeletal regeneration. Front Biosci (Elite Ed). 2011; 3:96–107.
76. de Mos M, van der Windt AE, Jahr H, van Schie HT, Weinans H, Verhaar JA, et al. Can platelet-rich plasma enhance tendon repair?: a cell culture study. Am J Sports Med. 2008; 36:1171–8.
77. Smith J, Sellon JL. Comparing PRP injections with ESWT for athletes with chronic patellar tendinopathy. Clin J Sport Med. 2014; 24:88–9.
Article
78. Dupley L, Charalambous CP. Platelet-rich plasma injections as a treatment for refractory patellar tendinosis: a meta-analysis of randomised trials. Knee Surg Relat Res. 2017; 29:165–71.
Article
79. Vetrano M, Castorina A, Vulpiani MC, Baldini R, Pavan A, Ferretti A. Platelet-rich plasma versus focused shock waves in the treatment of jumper’s knee in athletes. Am J Sports Med. 2013; 41:795–803.
Article
80. Unlu MC, Kivrak A, Kayaalp ME, Birsel O, Akgun I. Peritendinous injection of platelet-rich plasma to treat tendinopathy: a retrospective review. Acta Orthop Traumatol Turc. 2017; 51:482–7.
Article
81. Fahy KE, Miller EM, Kobayashi Y, Gottschalk AW. Efficacy of platelet-rich plasma on symptom reduction in patellar tendinopathy. Ochsner J. 2021; 21:232–4.
Article
82. Andriolo L, Altamura SA, Reale D, Candrian C, Zaffagnini S, Filardo G. Nonsurgical treatments of patellar tendinopathy: multiple injections of platelet-rich plasma are a suitable option: a systematic review and meta-analysis. Am J Sports Med. 2019; 47:1001–18.
Article
83. Dadgostar H, Fahimipour F, Pahlevan Sabagh A, Arasteh P, Razi M. Corticosteroids or platelet-rich plasma injections for rotator cuff tendinopathy: a randomized clinical trial study. J Orthop Surg Res. 2021; 16:333.
Article
84. Dickinson RN, Ayers GD, Archer KR, Fan R, Page C, Higgins LD, et al. Physical therapy versus natural history in outcomes of rotator cuff tears: the Rotator Cuff Outcomes Workgroup (ROW) cohort study. J Shoulder Elbow Surg. 2019; 28:833–8.
Article
85. Lo IK, Denkers MR, More KD, Nelson AA, Thornton GM, Boorman RS. Partial-thickness rotator cuff tears: clinical and imaging outcomes and prognostic factors of successful nonoperative treatment. Open Access J Sports Med. 2018; 9:191–7.
Article
86. Lin MT, Chiang CF, Wu CH, Huang YT, Tu YK, Wang TG. Comparative effectiveness of injection therapies in rotator cuff tendinopathy: a systematic review, pairwise and network meta-analysis of randomized controlled trials. Arch Phys Med Rehabil. 2019; 100:336–49.
Article
87. Zhou Y, Wang JH. PRP treatment efficacy for tendinopathy: a review of basic science studies. Biomed Res Int. 2016; 2016:9103792.
Article
88. Chen X, Jones IA, Togashi R, Park C, Vangsness CT Jr. Use of platelet-rich plasma for the improvement of pain and function in rotator cuff tears: a systematic review and meta-analysis with bias assessment. Am J Sports Med. 2020; 48:2028–41.
Article
89. A Hamid MS, Sazlina SG. Platelet-rich plasma for rotator cuff tendinopathy: a systematic review and meta-analysis. PLoS One. 2021; 16:e0251111.
Article
90. Giovannetti de Sanctis E, Franceschetti E, De Dona F, Palumbo A, Paciotti M, Franceschi F. The efficacy of injections for partial rotator cuff tears: a systematic review. J Clin Med. 2020; 10:51.
Article
91. Lin MT, Wei KC, Wu CH. Effectiveness of platelet-rich plasma injection in rotator cuff tendinopathy: a systematic review and meta-analysis of randomized controlled trials. Diagnostics (Basel). 2020; 10:189.
Article
92. Kelley MJ, McClure PW, Leggin BG. Frozen shoulder: evidence and a proposed model guiding rehabilitation. J Orthop Sports Phys Ther. 2009; 39:135–48.
Article
93. Thu AC, Kwak SG, Shein WN, Htun M, Htwe TT, Chang MC. Comparison of ultrasound-guided platelet-rich plasma injection and conventional physical therapy for management of adhesive capsulitis: a randomized trial. J Int Med Res. 2020; 48:300060520976032.
Article
94. El-Sharkawy H, Kantarci A, Deady J, Hasturk H, Liu H, Alshahat M, et al. Platelet-rich plasma: growth factors and pro- and anti-inflammatory properties. J Periodontol. 2007; 78:661–9.
Article
95. Karabaş Ç, Talay Çalış H, Topaloğlu US, Karakükçü Ç. Effects of platelet-rich plasma injection on pain, range of motion, and disability in adhesive capsulitis: a prospective, randomized-controlled study. Turk J Phys Med Rehabil. 2021; 67:462–72.
Article
96. Barman A, Mukherjee S, Sahoo J, Maiti R, Rao PB, Sinha MK, et al. Single intra-articular platelet-rich plasma versus corticosteroid injections in the treatment of adhesive capsulitis of the shoulder: a cohort study. Am J Phys Med Rehabil. 2019; 98:549–57.
Article
97. Shahzad HF, Taqi M, Gillani SF, Masood F, Ali M. Comparison of functional outcome between intra-articular injection of corticosteroid versus platelet-rich plasma in frozen shoulder: a randomized controlled trial. Cureus. 2021; 13:e20560.
Article
98. Kearney RS, Ji C, Warwick J, Parsons N, Brown J, Harrison P, et al. Effect of platelet-rich plasma injection vs sham injection on tendon dysfunction in patients with chronic midportion Achilles tendinopathy: a randomized clinical trial. JAMA. 2021; 326:137–44.
99. Moraes VY, Lenza M, Tamaoki MJ, Faloppa F, Belloti JC. Platelet-rich therapies for musculoskeletal soft tissue injuries. Cochrane Database Syst Rev. 2014; 2014:CD010071.
Article
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