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Growth factor levels in leukocyte-poor platelet-rich plasma and correlations with donor age, gender, and platelets in the Japanese population



Clinical application of platelet-rich-plasma (PRP) has been accelerated to investigate early recovery from various musculoskeletal conditions. It involves the promotion of tissue damage repair through the action of multiple growth factors at physiological concentrations. The composition of PRP differs based on many factors, which may include age and gender. Therefore, we analyzed correlations between age, gender, and platelet counts in PRP with growth factors in Japanese subjects.


Peripheral blood was drawn from 39 healthy volunteers between 20 and 49 years of age (age, mean ± standard deviation = 33 ± 8.7 years; gender ratio, male:female = 19:20; BMI, mean ± standard deviation = 22 ± 4.0) and prepared through centrifugation (volume, 6 mL per sample). After being activated with CaCl2, the supernatant was stored. The mean platelet count in PRP was 41.4 ± 12.2 × 104/μL. PRP concentration rate (i.e., PRP/peripheral platelet counts) was 1.8 ± 0.4 times. Growth factor levels (platelet-derived growth factor-BB, transforming growth factor-β1, vascular endothelial growth factor, epidermal growth factor, fibroblast growth factor, insulin-like growth factor-1, and hepatocyte growth factor) were measured using enzyme-linked immunosorbent assay (ELISA), and correlations with age, gender, and PRP platelet counts were statistically analyzed by calculating Spearman’s rank correlation coefficients (r).


Age was negatively correlated with platelet-derived growth factor-BB and insulin-like growth factor-1 (r = − 0.32, − 0.39), and gender had no influence on growth factors. Platelet counts in PRP positively correlated with platelet-derived growth factor-BB, transforming growth factor-β1, epidermal growth factor, and hepatocyte growth factor (r = 0.39, 0.75, 0.71, and 0.48, respectively).


This clinical study shows a significant variation of PRP among individual patients and that this variation is influenced by the age and the platelet counts of the subjects. Our data demonstrate that patient characteristics account for the differences in PRP physiological activity.


Platelet-rich-plasma (PRP) is defined as “the plasma fraction rich in platelets obtained from centrifuged whole blood” (Marx, 2001; Marx, 2004). Platelets contain different growth factors (GFs), a group of biologically active polypeptides that can stimulate cellular division, growth, and differentiation. In PRP therapy, various GFs in platelet-rich α-granules and GFs in the plasma as well as adhesion factors/glycoproteins are believed to act on tissue damage; moreover, this therapy is convenient and safe for the application of “autologous blood-derived products obtained through blood drawing” (Foster et al., 2009; Tayapongsak et al., 1994). In the past, PRP therapy has been conventionally used for bone formation and wound healing in oral surgery or plastic surgery. PRP therapy was first introduced by Tayapongsak et al. (1994) for mandibular reconstruction, and Whitman et al. (1997) started using it in dental/oral surgery in 3 years later. In the past decade, PRP therapy has been clinically applied in orthopedics to promote early recovery for various musculoskeletal conditions and then has expanded to include a wide variety of pathological conditions such as muscle strain, rotator cuff repair, knee osteoarthritis (OA), and tendinopathy (Fitzpatrick et al., 2017; Hamid et al., 2014; Reurink et al., 2014; Sanchez et al., 2012; Taniguchi et al., 2018; Zhang et al., 2016). However, a systematic review (Moraes et al., 2013), which evaluated PRP therapy for the treatment of musculoskeletal soft tissue injuries such as ligament, muscle and tendon tears, and tendinopathies and individual clinical conditions, concluded that evidence is insufficient to support the use of PRP for the treatment of musculoskeletal soft tissue injuries.

There are two major factors involved in the different clinical outcomes of PRP administration for various musculoskeletal conditions. First, devices from different manufacturers used to prepare PRP result in different quality. PRP with variations—including in platelet count, white blood cell (WBC) count, and some GFs—caused by various preparation protocols (the number of centrifugation steps, revolutions per minute, and the presence or absence of activation) has been reported (Castillo et al., 2011; Chahla et al., 2017; Kobayashi et al., 2016; Kushida et al., 2014; Oh et al., 2015). In order to determine the efficacy of PRP treatment, it is necessary to evaluate the composition of PRP prepared using various protocols. DeLong et al. (2012) and Mishra et al. (2012) proposed a mechanism to classify PRP. However, the devices and protocols used for PRP preparation are not the only factors contributing to wide disparities in biological activity; peripheral blood from an individual patient is characterized by a large inherent variability in the concentrations of platelets and GFs.

Recently, PRP has been used for various musculoskeletal conditions, and the age and gender of treated patients vary. Moreover, the age and gender affect biology and may also be important variables that influence the composition of PRP. However, only a few studies reported on correlations between GFs, age, and sex in PRP (Dragoo et al., 2012; Evanson et al., 2014; Weibrich et al., 2002; Xiong et al., 2017), and there is no report on the Japanese population in particular.

In this study, platelet and plasma-derived GF levels contained in leukocyte-poor PRP (LP-PRP) from Japanese subjects were exhaustively analyzed to provide basic data supporting the use of PRP therapy in the Japanese population. Specifically, we analyzed the influence of age, gender, and platelet counts in PRP on its quality.


This study was reviewed and approved by the official ethical review board at our hospital. Prior to drawing blood, informed consent was obtained from each donor.

Subjects and sample collection

Blood samples were collected from healthy individuals who donated blood during routine blood drives in the hospital. All identifiable subject information was omitted by the study’s personnel. The volunteers eligible for inclusion were male and female individuals from 20 to 49 years old who were not taking medication. Blood donors were provided with an information sheet prior to donating blood, which explained the purpose of the study and allowed them to decline to participate without affecting their ability to donate blood.

PRP preparation

A 21 gauge butterfly needle was used to draw 36 mL of peripheral blood from the cubital vein of the subjects, avoiding hemolysis. Peripheral blood was collected into four 9-mL Spitz tubes containing 3.8% citric acid, centrifuged at 580×g for 8 minutes at room temperature (PRGF-Endoret® IV System; BTI Biotechnology Institute, Vitoria, Spain), and then separated into the erythrocyte layer, the buffy coat layer, and the plasma layer per Spitz tube. In the separated plasma layer, a safety area was set in the upper area of the buffy coat, avoiding aspiration of the buffy coat, and the upper half and lower half of the plasma layer were defined as platelet-poor-plasma (PPP) and platelet-rich-plasma (PRP), respectively. A dedicated aspirator in the PRGF®-Endoret® IV System (BTI Biotechnology Institute, Vitoria, Spain) was used for aspiration, and about 2 mL of PRP was collected per Spitz tube; thus, in total, about 8 mL of PRP was collected from the four tubes. The PRP was incubated at 37 °C for 1 hour after the addition of 5% calcium chloride (BTI Biotechnology Institute, Vitoria, Spain), and centrifuged at 1000×g for 20 min at 4 °C. The supernatant was then aspirated and stored at −80 °C.

Hematological analysis

The WBC, red blood cell (RBC), and platelet counts in the whole-blood samples, PPP, and PRP were determined by using an automated cell count analyzer (Sysmex KX-21 N, Sysmex Corp., Kobe, Japan).

GF quantification

The cryopreserved PRP was thawed at room temperature for use. Seven GFs were analyzed by using enzyme-linked immunosorbent assay (ELISA) kits specific for each GF (R&D Systems, Minneapolis, MN, USA). Platelet-derived growth factor (PDGF)-BB, transforming growth factor (TGF)-β1, vascular endothelial growth factor (VEGF), epidermal growth factor (EGF), fibroblast growth factor (FGF), insulin-like growth factor (IGF)-1, and hepatocyte growth factor (HGF) were measured according to the manufacturer’s recommendations. All standards and samples were analyzed in duplicate.

Statistical analysis

No formal sample size justification was performed for this study, as it was an exploratory study. Kruskal-Wallis test was used for three-group comparison with post-hoc Fisher’s least significant difference (LSD) analysis. Wilcoxon’s rank sum test was performed for two-group comparison. The correlation of GFs with age, gender, and platelet counts in PRP was analyzed using the Spearman’s correlation coefficient. A statistical significance level of P < 0.05 was set in all tests. All data analyses were performed with JMP 10.0.2 (SAS Institute, Tokyo, Japan).


Subject characteristics

Thirty-nine patients were enrolled in this study, including 19 females (48.7%) and 20 males (51.3%). Participants were classified into the following three age groups: 20–29, 30–39, and 40–49 years of age. Thirteen patients were 20 to 29 years (20s group), 13 patients were 30 to 39 years (30s group), and 13 patients were 40 to 49 years (40s group). The mean age (±standard deviation; range) was 33.9 (±8.7; 21–48 years), and the mean BMI was 21.4 (±4.0; 17.0–32.8 kg/m2).

Hematological analysis in PRP and peripheral blood

The findings of the hematological analysis are presented in Table 1. The average platelet count in the PRP (41.4 ± 12.1 × 104 /μL) was significantly higher than that in peripheral blood (23.4 ± 4.4 × 104 /μL). The platelet count in PRP was 1.8-fold higher than that in peripheral blood. Based on the platelet count and the presence of WBC and neutrophils, the PRP preparation was classified as P2-x-Bβ according to the Platelets, Activation, and White cells classification system (DeLong et al., 2012).

Table 1 Hematological variables of each blood component

Relationship between GF concentration and age, sex, and number of platelets in PRP

The results of the immunoassays for the seven GFs and the platelet counts of whole blood and PRP are summarized in Table 2. In the age-group comparison (20s, 30s, and 40s), a significant difference was observed in PDGF-BB, EGF, IGF-1, and platelet counts in the whole blood and PRP. A negative correlation between age and levels of PDGF-BB and IGF-1 was detected with the Spearman correlation test (p = 0.049 and 0.014, respectively). The scatter diagram graphs of PDGF-BB and IGF-1 showing a negative correlation with age are shown in Fig. 1.

Table 2 Statistics including correlation with age for 10 analytes
Fig. 1

Correlation between the age of volunteers and concentrations of PDGF-BB and IGF-1 in PRP samples. PDGF-BB and IGF-1 levels significantly correlated with age (Spearman a: PDGF-BB r=-0.32, p<0.05, b: r=0.39, p<0.05)

In this study, no significant difference in GF levels between male and female subjects was observed (Table 3). A correlation was observed between platelet counts in PRP and levels of PDGF-BB, TGF-β1, EGF, and HGF (Table 4). Scatter diagram graphs showing these correlations are shown in Fig. 2.

Table 3 Various factors’ concentrations as a function of gender
Table 4 Spearman’s correlation coefficients for platelet counts in platelet rich plasma and growth factor levels
Fig. 2

(a: PDGF-BB r=0. 39, p<0.05, b: TGF-β1 r=0. 75, p<0.001, c: EGF r=0.71, p<0.001, d: HGF r=0.48, p<0.05)


The physiological effect of PRP therapy on tissue damage is exerted through the integrated action of various GFs in platelet α-granules and GFs and glycoproteins (adhesion factors) contained in the plasma, while maintaining an equilibrium in vivo (Alsousou et al., 2009; Foster et al., 2009). GFs play a vital role in the recovery from injury of cartilage, ligaments, and tendons (Fortier et al., 2011; Molloy et al., 2003; Oliva et al., 2012). In this study, seven GFs in LP-PRP used in clinical practice were measured to analyze their correlations with age, gender, and platelet counts in PRP. This study provided the following information. First, a negative correlation was observed between age and the levels of PDGF-BB and IGF-1, two of the measured GFs. No correlation was detected between age and the other five GFs. Secondly, no correlation was detected between gender and levels of GFs in PRP. Finally, a positive correlation was observed between four of the seven GFs (PDGF-BB, TGF-β1, EGF, and HGF) and platelet counts in PRP. Additionally, GF levels were higher in subjects with greater platelet counts.

Some studies analyzed the relationship between age and gender and GFs contained in PRP. Evanson et al. (2014) reported that levels of PDGF-BB, TGF-β1, IGF-1, and EGF in the LP-PRP were statistically higher in subjects younger than 25 years old compared to those in subjects aged 26 years old or older. Additionally, some other studies reported a weak negative correlation between age and levels of PDGF-BB and IGF-1, but these studies did not describe the details of purified PRP (Cho et al., 2011; Dragoo et al., 2012; Weibrich et al., 2002). However, Anitua et al. reported that IGF-I levels were significantly reduced and HGF levels were increased in elderly individuals compared with the young group (Anitua et al., 2013). The results of this study indicate a correlation between age and levels of PDGF-BB and IGF-1 in the LP-PRP, consistent with previous studies. Moreover, the correlations between age and PDGF-BB (r = − 0.32) or IGF-1 (r = − 0.39) were weakly negative correlations, and no correlation was observed with the other five types of GFs (i.e., TGF-β1, VEGF, FGF, EGF, and HGF). PDGF is a potent mitogen and chemotactic factor for cells of mesenchymal origin, on which it demonstrates a major proliferative effect as well as inhibition of differentiation (Husmann et al., 1996). Also, PDGF-BB is one of the three isoforms of PDGF; with regard to muscle precursor cells in vitro, PDGF-BB showed a significant promotion of proliferation and inhibition of differentiation (Jin et al., 1990). IGF-1 also plays an important role in muscle regeneration, and its action has been clarified. It promotes both proliferation and differentiation of myoblasts, induces myofiber hypertrophy, and protects from atrophy. IGF-1 also increases myoblast proliferation (Barton-Davis et al., 1999) and myofiber protein synthesis (Bark et al., 1998). In other words, since both PDGF-BB and IGF-1 have a function to proliferate muscle cells in muscle regeneration, the results of this study suggest that LP-PRP prepared from young patients may be more effective for various musculoskeletal conditions in the clinical setting. In addition, PDGF-BB and IGF-1 inhibit nuclear factor-κB (NF-κB) activity and apoptosis via suppression of IL-1β (Montaseri et al., 2011). Since NF-κB plays a crucial role in OA, leading to cartilage destruction and articular damage (Roman-Blas & Jimenez, 2006), when using PRP for the treatment of OA, age must also be taken into consideration.

No significant difference was observed between gender and GFs in PRP in this study. A few studies reported a correlation between gender and GFs (Evanson et al., 2014; Weibrich et al., 2002; Xiong et al., 2017), but these results were inconsistent. Hormonal differences drive many sex-related differences between men and women. In particular, menstruation in women has a significant impact on hormones; increases in inflammatory markers were observed under the influence of menopause in some studies (Pfeilschifter et al., 2002; Singh & Newman, 2011). Subjects in this study were healthy adults between 21 and 48 years of age, and although the menstrual cycle was not taken into account, the female subjects were not affected by menopause. There was a possibility that the difference in the target age group influenced the results of this study.

There are some reports on platelet counts in PRP and GF levels (Anitua et al., 2009; Eppley et al., 2004; Magalon et al., 2014; McCarrel & Fortier, 2009; Sanchez et al., 2007). Despite earlier reports in the literature, the platelet number in PRP is positively correlated with GF concentration, but it is reported that GFs are not enriched as much as platelets and that there is a difference in concentration rate depending on the type of GFs. Several GFs are stored not only in platelets but also in leukocytes (Boswell et al., 2012) and are affected by the number of WBC in the PRP (Sundman et al., 2011). In this study, we investigated PDGF-BB, TGF-β1, VEGF, EGF, FGF, and HGF as GFs contained in the α-granules of platelets and IGF-1 as a GF contained in plasma but not platelets. The GFs that correlated with the platelet count in LP-PRP were PDGF-BB, TGF-β1, EGF, and HGF; the GF that showed the strongest positive correlation among them was TGF-β1. TGF-β is a multifunctional cytokine, which plays an important role in regulating repair and remodeling following tissue injury (Husmann et al., 1996). Following trauma, TGF-β is expressed by regenerating muscles, suggesting that it may play a role in muscle regeneration (Bachl et al., 2009). However, TGF-β1 has the ability to inhibit myogenic differentiation, myoblast fusion, and the expression of various muscle-specific proteins (Florini et al., 1991; Liu et al., 2001). Moreover, since TGF-β1 contributes to increased collagen deposition, causing muscle fibrosis, experimental studies have been conducted to antagonize TGF in PRP to suppress myofibrosis (Li et al., 2016; Terada et al., 2013). On the other hand, for articular cartilage, TGF-β1 is considered as an anabolic factor and capable of activating the chondrogenic properties of reparative mesenchymal stem cells in vitro (Johnstone et al., 1998; Mackay et al., 1998). Also, TGF-β1 required for the normal development of a joint, and the lack of its signaling can cause a normal joint to develop into an osteoarthritic joint. When PRP is used for various musculoskeletal conditions, there are scenes where TGF-β1 is required and not necessary, and the optimum PRP varies depending on the environment in which it is used. A correlation was observed between platelet counts in PRP and VEGF levels in the above studies; however, although the above studies used leukocyte-rich PRP, and LP-PRP was used in this study, the average was only 300/μL. The lack of correlation with VEGF can be explained by the fact that only a few leukocytes are contained in PRP, as a positive correlation has been reported between GFs and leukocyte counts in PRP (Castillo et al., 2011; Magalon et al., 2014). Interestingly, a positive correlation was observed between platelet counts in PRP and platelet-derived HGF in this study, which has not been reported previously. HGF is an inhibitor of NF-κB, one of the main transcription factors that controls the inflammation process (Bendinelli et al., 2010). PRP contains various platelet-derived GFs, functioning in accordance with the environment of use and affecting the cells and tissues targeted by each GF. Treatment outcome may also be influenced by the combined effects of GFs in some cases (Engebretsen et al., 2010; Foster et al., 2009). Previously, PRP GF concentration was generally considered to be proportional to platelet concentration. However, the results of this study indicate that even for platelet-derived GFs, not all GF concentrations are necessarily proportional to platelet concentration. Thus, when implementing PRP treatment for tissues and organs targeted by these GFs, the GF concentration needs to be assessed separately from platelet concentration. In effect, the “more is better” theory does not appear to be valid for platelet concentration in PRP (Giusti et al., 2014). Rather, an appropriate type of PRP needs to be selected in accordance with the target tissue and environment of use.

While this study investigated inherent differences among individual patients in the PRP composition, host factors may also affect responses to PRP treatment. For example, the younger the age in this study, the higher the IGF-1 concentration in PRP, but the response of tissues to GFs varies based on host characteristics such as age and gender. Furthermore, subject age may affect the potential for regenerative responses. As previously mentioned, older, arthritic chondrocytes show a blunted response to IGF-1 (Loeser et al., 2014; Verschure et al., 1995). For future research, based on the results of this study, the impact of host factors on PRP treatment should also be considered.

This study has some limitations. First, the subject age groups were limited. As this study was designed to include subjects in their 20s, 30s, and 40s with athletes in mind, data obtained from this study do not provide information for the middle-aged population of 50 years of age or older. As PRP is used in injection therapy for osteoarthritis of the knee, data from the population of 50 years of age or older are required in the future. Secondly, the results of this study are mostly exploratory in nature because the sample size was insufficient to confirm the relationship between GFs and age and gender, respectively. Thus, the findings should be interpreted cautiously.


In this study, GF concentrations contained in LP-PRP were analyzed. A negative correlation was observed between age and levels of PDGF-BB and IGF-1, while a positive correlation was detected between platelet counts in PRP and levels of PDGF-BB, TGF-β1, EGF, and HGF. Gender had no significant influence on GF levels. The results of this study are important basic data for the use of LP-PRP in clinical practice.



Epidermal growth factor


Fibroblast growth factor


Hepatocyte growth factor


Insulin-like growth factor


Leukocyte-poor PRP


Least significant difference


Nuclear factor-κB




Platelet-derived growth factor




Platelet-poor plasma


Platelet-rich plasma


Red blood cells


Transforming growth factor


Vascular endothelial growth factor


White blood cells


  1. Alsousou J, Thompson M, Hulley P, Noble A, Willett K (2009) The biology of platelet-rich plasma and its application in trauma and orthopaedic surgery: a review of the literature. J Bone Joint Surg Br 91(8):987–996.

    CAS  Article  PubMed  Google Scholar 

  2. Anitua E, Pascual C, Pérez-Gonzalez R, Antequera D, Padilla S, Orive G et al (2013) Intranasal delivery of plasma and platelet growth factors using PRGF-Endoret system enhances neurogenesis in a mouse model of Alzheimer's disease. PLoS One 8(9):e73118.

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  3. Anitua E, Sanchez M, Zalduendo MM, de la Fuente M, Prado R, Orive G et al (2009) Fibroblastic response to treatment with different preparations rich in growth factors. Cell Prolif 42(2):162–170.

    CAS  Article  PubMed  Google Scholar 

  4. Bachl N, Derman W, Engebretsen L, Goldspink G, Kinzlbauer M, Tschan H et al (2009) Therapeutic use of growth factors in the musculoskeletal system in sports-related injuries. J Sports Med Phys Fitness 49(4):346–357.

    CAS  PubMed  Google Scholar 

  5. Bark TH, McNurlan MA, Lang CH, Garlick PJ (1998) Increased protein synthesis after acute IGF-I or insulin infusion is localized to muscle in mice. Am J Physiol Endocrinol Metab 275(1):118–123.

    Article  Google Scholar 

  6. Barton-Davis ER, Shoturma DI, Sweeney HL (1999) Contribution of satellite cells to IGF-I induced hypertrophy of skeletal muscle. Acta Physiol Scand 167(4):301–305.

    CAS  Article  PubMed  Google Scholar 

  7. Bendinelli P, Matteucci E, Dogliotti G, Corsi MM, Banfi G, Maroni P et al (2010) Molecular basis of anti-inflammatory action of platelet-rich plasma on human chondrocytes: mechanisms of NF-kappaB inhibition via HGF. J Cell Physiol 225(3):757–766.

    CAS  Article  PubMed  Google Scholar 

  8. Boswell SG, Cole BJ, Sundman EA, Karas V, Fortier LA (2012) Platelet-rich plasma: a milieu of bioactive factors. Arthroscopy 28(3):429–439.

    Article  PubMed  Google Scholar 

  9. Castillo TN, Pouliot MA, Kim HJ, Dragoo JL (2011) Comparison of growth factor and platelet concentration from commercial platelet-rich plasma separation systems. Am J Sports Med 39(2):266–271.

    Article  PubMed  Google Scholar 

  10. Chahla J, Cinque ME, Piuzzi NS, Mannava S, Geeslin AG, Murray IR et al (2017) A call for standardization in platelet-rich plasma preparation protocols and composition reporting: a systematic review of the clinical orthopaedic literature. J Bone Joint Surg Am 99(20):1769–1779.

    Article  PubMed  Google Scholar 

  11. Cho HS, Song IH, Park SY, Sung MC, Ahn MW, Song KE (2011) Individual variation in growth factor concentrations in platelet-rich plasma and its influence on human mesenchymal stem cells. Korean J Lab Med 31(3):212–218.

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  12. DeLong JM, Russell RP, Mazzocca AD (2012) Platelet-rich plasma: the PAW classification system. Arthroscopy 28(7):998–1009.

    Article  PubMed  Google Scholar 

  13. Dragoo JL, Korotkova T, Wasterlain AS, Pouliot MA, Kim HJ, Golish SR (2012) Age-related changes of chondrogenic growth factors in platelet-rich plasma. Oper Tech Orthop 22(2):49–55.

    Article  Google Scholar 

  14. Engebretsen L, Steffen K, Alsousou J, Anitua E, Bachl N, Devilee R et al (2010) IOC consensus paper on the use of platelet-rich plasma in sports medicine. Br J Sports Med 44(15):1072–1081.

    Article  PubMed  Google Scholar 

  15. Eppley BL, Woodell JE, Higgins J (2004) Platelet quantification and growth factor analysis from platelet-rich plasma: implications for wound healing. Plast Reconstr Surg:1502–1508.

  16. Evanson JR, Guyton MK, Oliver DL, Hire JM, Topolski RL, Zumbrun SD et al (2014) Gender and age differences in growth factor concentrations from platelet-rich plasma in adults. Mil Med 179(7):799–805.

    Article  PubMed  Google Scholar 

  17. Fitzpatrick J, Bulsara M, Zheng MH (2017) The effectiveness of platelet-rich plasma in the treatment of tendinopathy: a meta-analysis of randomized controlled clinical trials. Am J Sports Med 45(1):226–233.

    Article  PubMed  Google Scholar 

  18. Florini JR, Ewton DZ, Magri KA (1991) Hormones, growth factors, and myogenic differentiation. Annu Rev Physiol 53:201–216.

    CAS  Article  PubMed  Google Scholar 

  19. Fortier LA, Barker JU, Strauss EJ, McCarrel TM, Cole BJ (2011) The role of growth factors in cartilage repair. Clin Orthop Relat Res 469(10):2706–2715.

    Article  PubMed  PubMed Central  Google Scholar 

  20. Foster TE, Puskas BL, Mandelbaum BR, Gerhardt MB, Rodeo SA (2009) Platelet-rich plasma: from basic science to clinical applications. Am J Sports Med 37(11):2259–2272.

    Article  PubMed  Google Scholar 

  21. Giusti I, D'Ascenzo S, Manco A, Di Stefano G, Di Francesco M, Rughetti A et al (2014) Platelet concentration in platelet-rich plasma affects tenocyte behavior in vitro. Biomed Res Int 2014:630870.

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  22. Hamid MSA, Mohamed Ali MR, Yusof A, George J, Lee LP (2014) Platelet-rich plasma injections for the treatment of hamstring injuries: a randomized controlled trial. Am J Sports Med 42(10):2410–2418.

    Article  Google Scholar 

  23. Husmann I, Soulet L, Gautron J, Martelly I, Barritault D (1996) Growth factors in skeletal muscle regeneration. Cytokine Growth Factor Rev 7(3):249–258.

    CAS  Article  PubMed  Google Scholar 

  24. Jin P, Rahm M, Claesson-Welsh L, Heldin CH, Sejersen T (1990) Expression of PDGF A-chain and beta-receptor genes during rat myoblast differentiation. J Cell Biol 110(5):1665–1672.

    CAS  Article  PubMed  Google Scholar 

  25. Johnstone B, Hering TM, Caplan AI, Goldberg VM, Yoo JU (1998) In vitro chondrogenesis of bone marrow-derived mesenchymal progenitor cells. Exp Cell Res 238(1):265–272.

    CAS  Article  PubMed  Google Scholar 

  26. Kobayashi Y, Saita Y, Nishio H, Ikeda H, Takazawa Y, Nagao M et al (2016) Leukocyte concentration and composition in platelet-rich plasma (PRP) influences the growth factor and protease concentrations. J Orthop Sci 21(5):683–689.

    Article  PubMed  Google Scholar 

  27. Kushida S, Kakudo N, Morimoto N, Hara T, Ogawa T, Mitsui T et al (2014) Platelet and growth factor concentrations in activated platelet-rich plasma: a comparison of seven commercial separation systems. J Artif Organs 17(2):186–192.

    CAS  Article  PubMed  Google Scholar 

  28. Li H, Hicks JJ, Wang L, Oyster N, Philippon MJ, Hurwitz S et al (2016) Customized platelet-rich plasma with transforming growth factor beta1 neutralization antibody to reduce fibrosis in skeletal muscle. Biomaterials 87:147–156.

    CAS  Article  PubMed  Google Scholar 

  29. Liu D, Black BL, Derynck R (2001) TGF-beta inhibits muscle differentiation through functional repression of myogenic transcription factors by Smad3. Genes Dev 15(22):2950–2966.

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  30. Loeser RF, Gandhi U, Long DL, Yin W, Chubinskaya S (2014) Aging and oxidative stress reduce the response of human articular chondrocytes to insulin-like growth factor 1 and osteogenic protein 1. Arthritis Rheum 66(8):2201–2209.

    CAS  Article  Google Scholar 

  31. Mackay AM, Beck SC, Murphy JM, Barry FP, Chichester CO, Pittenger MF (1998) Chondrogenic differentiation of cultured human mesenchymal stem cells from marrow. Tissue Eng 4(4):415–428.

    CAS  Article  PubMed  Google Scholar 

  32. Magalon J, Bausset O, Serratrice N, Giraudo L, Aboudou H, Veran J et al (2014) Characterization and comparison of 5 platelet-rich plasma preparations in a single-donor model. Arthroscopy 30(5):629–638.

    Article  PubMed  Google Scholar 

  33. Marx RE (2001) Platelet-rich plasma (PRP): what is PRP and what is not PRP? Implant Dent 10(4):225–228.

    CAS  Article  Google Scholar 

  34. Marx RE (2004) Platelet-rich plasma: evidence to support its use. J Oral Maxillofac Surg 62(4):489–496.

    Article  PubMed  Google Scholar 

  35. McCarrel T, Fortier L (2009) Temporal growth factor release from platelet-rich plasma, trehalose lyophilized platelets, and bone marrow aspirate and their effect on tendon and ligament gene expression. J Orthop Res 27(8):1033–1042.

    CAS  Article  PubMed  Google Scholar 

  36. Mishra A, Harmon K, Woodall J, Vieira A (2012) Sports medicine applications of platelet rich plasma. Curr Pharm Biotechnol 13(7):1185–1195.

    CAS  Article  PubMed  Google Scholar 

  37. Molloy T, Wang Y, Murrell G (2003) The roles of growth factors in tendon and ligament healing. Sports Med 33(5):381–394.

    Article  PubMed  Google Scholar 

  38. Montaseri A, Busch F, Mobasheri A, Buhrmann C, Aldinger C, Rad JS et al (2011) IGF-1 and PDGF-bb suppress IL-1beta-induced cartilage degradation through down-regulation of NF-kappaB signaling: involvement of Src/PI-3K/AKT pathway. PLoS One 6(12):e28663.

    CAS  Article  PubMed  PubMed Central  Google Scholar 

  39. Moraes VY, Lenza M, Tamaoki MJ, Faloppa F, Belloti JC (2013) Platelet-rich therapies for musculoskeletal soft tissue injuries. Cochrane Database Syst Rev 12:CD010071.

    Article  Google Scholar 

  40. Oh JH, Kim W, Park KU, Roh YH (2015) Comparison of the cellular composition and cytokine-release kinetics of various platelet-rich plasma preparations. Am J Sports Med 43(12):3062–3070.

    Article  PubMed  Google Scholar 

  41. Oliva F, Gatti S, Porcellini G, Forsyth NR, Maffulli N (2012) Growth factors and tendon healing. Med Sport Sci 57:53–64.

    Article  PubMed  Google Scholar 

  42. Pfeilschifter J, Koditz R, Pfohl M, Schatz H (2002) Changes in proinflammatory cytokine activity after menopause. Endocr Rev 23(1):90–119.

    CAS  Article  PubMed  Google Scholar 

  43. Reurink G, Goudswaard GJ, Moen MH, Weir A, Verhaar JA, Bierma-Zeinstra SM et al (2014) Platelet-rich plasma injections in acute muscle injury. N Engl J Med 370(26):2546–2547.

    CAS  Article  PubMed  Google Scholar 

  44. Roman-Blas JA, Jimenez SA (2006) NF-kappaB as a potential therapeutic target in osteoarthritis and rheumatoid arthritis. Osteoarthr Cartil 14(9):839–848.

    CAS  Article  PubMed  Google Scholar 

  45. Sanchez M, Anitua E, Azofra J, Andia I, Padilla S, Mujika I (2007) Comparison of surgically repaired Achilles tendon tears using platelet-rich fibrin matrices. Am J Sports Med 35(2):245–251.

    Article  PubMed  Google Scholar 

  46. Sanchez M, Fiz N, Azofra J, Usabiaga J, Aduriz Recalde E, Garcia Gutierrez A et al (2012) A randomized clinical trial evaluating plasma rich in growth factors (PRGF-Endoret) versus hyaluronic acid in the short-term treatment of symptomatic knee osteoarthritis. Arthroscopy 28(8):1070–1078.

    Article  PubMed  Google Scholar 

  47. Singh T, Newman AB (2011) Inflammatory markers in population studies of aging. Ageing Res Rev 10(3):319–329.

    CAS  Article  PubMed  Google Scholar 

  48. Sundman EA, Cole BJ, Fortier LA (2011) Growth factor and catabolic cytokine concentrations are influenced by the cellular composition of platelet-rich plasma. Am J Sports Med 39(10):2135–2140.

    Article  PubMed  Google Scholar 

  49. Taniguchi Y, Yoshioka T, Kanamori A, Aoto K, Sugaya H, Yamazaki M (2018) Intra-articular platelet-rich plasma (PRP) injections for treating knee pain associated with osteoarthritis of the knee in the Japanese population: a phase I and IIa clinical trial. Nagoya J Med Sci 80(1):39–51.

    Article  PubMed  PubMed Central  Google Scholar 

  50. Tayapongsak P, O'Brien DA, Monteiro CB, Arceo-Diaz LY (1994) Autologous fibrin adhesive in mandibular reconstruction with particulate cancellous bone and marrow. J Oral Maxillofac Surg 52(2):161–165.

    CAS  Article  PubMed  Google Scholar 

  51. Terada S, Ota S, Kobayashi M, Kobayashi T, Mifune Y, Takayama K et al (2013) Use of an antifibrotic agent improves the effect of platelet-rich plasma on muscle healing after injury. J Bone Joint Surg Am 95(11):980–988.

    Article  PubMed  Google Scholar 

  52. Verschure PJ, van Marle J, Joosten LA, van den Berg WB (1995) Chondrocyte IGF-1 receptor expression and responsiveness to IGF-1 stimulation in mouse articular cartilage during various phases of experimentally induced arthritis. Ann Rheum Dis 54(8):645–653.

    CAS  Article  Google Scholar 

  53. Weibrich G, Kleis WK, Hafner G, Hitzler WE (2002) Growth factor levels in platelet-rich plasma and correlations with donor age, sex, and platelet count. J Craniomaxillofac Surg 30(2):97–102.

    Article  PubMed  Google Scholar 

  54. Whitman DH, Berry RL, Green DM (1997) Platelet gel: an autologous alternative to fibrin glue with applications in oral and maxillofacial surgery. J Oral Maxillofac Surg 55(11):1294–1299.

    CAS  Article  PubMed  Google Scholar 

  55. Xiong G, Lingampalli N, Koltsov JCB, Leung LL, Bhutani N, Robinson WH et al (2017) Men and women differ in the biochemical composition of platelet-rich plasma. Am J Sports Med 46(2):409–419.

    Article  PubMed  Google Scholar 

  56. Zhang Z, Wang Y, Sun J (2016) The effect of platelet-rich plasma on arthroscopic double-row rotator cuff repair: a clinical study with 12-month follow-up. Acta Orthop Traumatol Turc 50(2):191–197.

    Article  PubMed  Google Scholar 

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The present study was supported by a grant of the Japan Sports Medicine Foundation, 2013.

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All data analyzed during this study are included in this published article.

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TY, AK, KA, and MY conceived and supervised the study; YT and HS designed and performed the laboratory analysis; MG analyzed data; and YT wrote the manuscript. All authors approved the final version of the manuscript.

Corresponding author

Correspondence to Tomokazu Yoshioka.

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This study was reviewed and approved by the official ethical review board at University of Tsukuba Hospital (Approval number: H26–120). Prior to drawing blood, written informed consent was obtained from each donor.

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The authors declare that they have no competing interests.

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Taniguchi, Y., Yoshioka, T., Sugaya, H. et al. Growth factor levels in leukocyte-poor platelet-rich plasma and correlations with donor age, gender, and platelets in the Japanese population. J EXP ORTOP 6, 4 (2019).

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  • Platelet-rich plasma
  • Age
  • Gender
  • Platelet count
  • Growth factor