Efficacy of Huangma Ding or autologous platelet-rich gel for the diabetic lower extremity arterial disease patients with foot ulcers

BACKGROUND Diabetes foot is one of the most serious complications of diabetes and an important cause of death and disability,traditional treatment has poor efficacy and there is an urgent need to develop a practical treatment method.AIM To investigate whether Huangma Ding or autologous platelet-rich gel(APG)treatment would benefit diabetic lower extremity arterial disease(LEAD)patients with foot ulcers.METHODS A total of 155 diabetic LEAD patients with foot ulcers were enrolled and divided into three groups:Group A(62 patients;basal treatment),Group B(38 patients;basal treatment and APG),and Group C(55 patients;basal treatment and Huangma Ding).All patients underwent routine follow-up visits for six months.After follow-up,we calculated the changes in all variables from baseline and determined the differences between groups and the relationships between parameters.RESULTS The infection status of the three groups before treatment was the same.Procalcitonin(PCT)improved after APG and Huangma Ding treatment more than after traditional treatment and was significantly greater in Group C than in Group B.Logistic regression analysis revealed that PCT was positively correlated with total amputation,primary amputation,and minor amputation rates.The ankle-brachial pressure and the transcutaneous oxygen pressure in Groups B and C were greater than those in Group A.The major amputation rate,minor amputation rate,and total amputation times in Groups B and C were lower than those in Group A.CONCLUSION Our research indicated that diabetic foot ulcers(DFUs)lead to major amputation,minor amputation,and total amputation through local infection and poor microcirculation and macrocirculation.Huangma Ding and APG were effective attreating DFUs.The clinical efficacy of Huangma Ding was better than that of autologous platelet gel,which may be related to the better control of local infection by Huangma Ding.This finding suggested that in patients with DFUs combined with coinfection,controlling infection is as important as improving circulation.

Effect of Bismuth Subgallate/Borneol Combined with Autologous Platelet-Rich Gel in the Treatment of Patients with Diabetic Foot Ulcers

Objective: To explore the effect of Bismuth Subgallate/Borneol (SuileTM BSB) healing dressing combined with autologous platelet-rich gel (APG) in the treatment of diabetic foot ulcer (DFU). Methods: A total of 120 patients with DFU hospitalized in the Changsha Central Hospital from August 2020 to September 2021 were selected and randomly divided into an experimental group (BSB + APG, n = 60) and a control group (BSB, n = 60) according to random number table method. The total therapeutic effect, healing time, hospital stay, level indexes of various inflammatory factors before and after treatment and ulcer area were observed in the two groups. Results: The total effect of the control group was worse than that of the experimental group, and the data between the two groups were significant (P 0.05);after treatment, the levels of inflammatory factors including WBC, CRP, IL-6 and TNF-α in the control group were higher than those in the experimental group, and there was significant difference between the two groups (P 0.05);after 14 days of treatment, the ulcer area in the control group was larger than that in the experimental group, and the data between the two groups were significant (P Conclusion: BSB combined with APG can achieve better therapeutic effect, reduce the inflammatory reaction of patients, and promote wound healing in the treatment of patients with diabetic foot ulcer.

Clinical and Magnetic Resonance Image Changes of Platelet-Rich Plasma Therapy in Combination with Human Mesenchymal Stem Cells from Autologous Adipose Tissue for Knee Osteoarthritis Treatment

Objective: To evaluate the efficacy based on clinical symptom and on magnetic resonance image of platelet-rich plasma therapy in combination with mesenchymal stem cells from autologous adipose tissue for knee osteoarthritis treatment. Patients and Method: 30 patients including 26 females and 4 males;correspondingly, 60 knee joints were diagnosed with osteoarthritis with stages II - III of Kellgren and Lawrence, their mean age was 58.63 ± 11.11. All were injected with autologous platelet-rich plasma that was extracted by PRP set, APC 30 PRP PRCEDURE PRAK and autologously extracted mesenchymal stem cells from abdominal adipose tissue using the ADI-25-01 ADIPOSEPRCEDURE PRAK of USA. Results: After 12 months: the pain level according to VAS score at the right knee joint was decreased from 6.0 ± 1.28 before treatment to 1.9 ± 0.3;VAS score at the left knee joint was decreased from 6.43 ± 1.19 to 2.25 ± 0.43. Total Lequene score at right knee joint was decreased from 16.04 ± 1.57 before treatment to 4.31 ± 1.04, at left knee joint was decreased from 17.52 ± 1.74 before treatment to 5.15 ± 1.48. Total WOMAC score at right knee joint was decreased from 55.93 ± 5.56 to 10.37 ± 1.56;at left knee joint was decreased from 53.97 ± 5.57 to 10.07 ± 1.59. There were 86.77% joints with cartilage thickness change and the patellar cartilage thickness was increased from 1.56 ± 0.09 mm before treatment to 1.65 ± 0.09 mm. Conclusion: The treatment of knee osteoarthritis by platelet-rich plasma therapyin combination with mesenchymal stem cells from autologous adipose tissue is effective in reducing pain, improving patient's mobility and walking function, reforming articular cartilage thickness on magnetic resonance image.

Autologous peripheral blood-derived orthobiologics:Different types and their effectiveness in managing knee osteoarthritis

Knees are the most commonly impacted weight-bearing joints in osteoarthritis(OA),affecting millions of people worldwide.With increasing life spans and obesity rates,the incidence of knee OA will further increase,leading to a significant increase in the economic burden.Conventional treatment modalities utilized to manage knee OA have limitations.Over the last decade,the role of various autologous peripheral blood-derived orthobiologics(APBOs)for the treatment of knee OA has been extensively investigated.This editorial provided an overview and focused on defining and shedding light on the current state of evidence based on the most recent published clinical studies concerning the use of APBO for the management of knee OA.While numerous studies have demonstrated promising results for these preparations,a notable gap exists in the comparative analysis of these diverse formulations.This absence of head-to-head studies poses a considerable challenge for physicians/surgeons in determining the optimal preparation for managing knee OA and achieving sustained longterm results.Thus,more adequately powered,multicenter,prospective,doubleblind,randomized controlled trials with longer follow-ups are needed to establish the long-term efficacy and to aid physicians/surgeons in determining the optimal APBO for the management of knee OA.

Effect of Xuesaitong Combined with Autologous Platelet-rich Gel on Blood Glucose,AT-III,TNF-αand 24-h Urinary Protein Level in Patients with Diabetic Foot

[Objectives]To investigate the clinical effect of different doses of Xuesaitong combined with autologous platelet-rich gel(APG)on patients with diabetic foot(DF).[Methods]90 patients with diabetic foot admitted to our hospital from February 2017 to February 2019 were enrolled in the study.According to the random number table method,the subjects were divided into study group A and B and control group C.Group A was given a low dose of Xuesaitong combined with APG,while group B was given high-dose Xuesaitong combined with APG and group C was treated only with APG.Patients in the three groups were observed and the changes of related indexes were detected.[Results]After treatment,with regard to the three groups,the fasting blood glucose,2-h postprandial blood glucose level,HbA1c,TNF-α,Hcy,blood urea nitrogen(BUN),creatinine(Cr)and 24-h urine protein levels were all decreased,yet AT-III level was increased,and granulation tissue coverage and thickness,wound clearance rate were increased,while the repair time of ulcer surface was significantly reduced.The above indexes were all significantly different(P<0.05).Compared with the control group C,the changes of the indexes in the study group A and B were the same as above,and the difference was significant(P<0.05).Compared with the study group A,the level of AT-III in group B was significantly increased(P<0.05),while TNF-α,Hcy,BUN,Cr and 24-h urine protein levels were significantly decreased(P<0.05).There was no significant difference in the other indexes between groups A and B(P>0.05).[Conclusions]Xuesaitong combined with APG could effectively reduce the blood sugar level of DF patients,improve the clinical indexes,promote wound healing,and the high-dose group had more significant advantages and was worthy of promotion.

Therapeutic Effectiveness of Leukocyte-and Platelet-rich Fibrin for Diabetic Foot Ulcers:A Retrospective Study

Objective Diabetic foot ulcer(DFU)is one of the most serious complications of diabetes.Leukocyte-and platelet-rich fibrin(L-PRF)is a second-generation autologous platelet-rich plasma.This study aims to investigate the clinical effects of L-PRF in patients with diabetes in real clinical practice.Methods Patients with DFU who received L-PRF treatment and standard of care(SOC)from 2018 to 2019 in Tongji Hospital were enrolled.The clinical information including patient characteristics,wound evaluation(area,severity,infection,blood supply),SOC of DFU,and images of ulcers was retrospectively extracted and analyzed.L-PRF treatment was performed every 7±2 days until the ulcer exhibited complete epithelialization or an overall percent volume reduction(PVR)greater than 80%.Therapeutic effectiveness,including overall PVR and the overall and weekly healing rates,was evaluated.Results Totally,26 patients with DFU were enrolled,and they had an ulcer duration of 47.0(35.0,72.3)days.The severity and infection of ulcers varied,as indicated by the Site,Ischemia,Neuropathy,Bacterial Infection,and Depth(SINBAD)scores of 2–6,Wagner grades of 1–4,and the Perfusion,Extent,Depth,Infection and Sensation(PEDIS)scores of 2–4.The initial ulcer volume before L-PRF treatment was 4.94(1.50,13.83)cm3,and the final ulcer volume was 0.35(0.03,1.76)cm3.The median number of L-PRF doses was 3(2,5).A total of 11 patients achieved complete epithelialization after the fifth week of treatment,and 19 patients achieved at least an 80%volume reduction after the seventh week.The overall wound-healing rate was 1.47(0.63,3.29)cm3/week,and the healing rate was faster in the first 2 weeks than in the remaining weeks.Concurrent treatment did not change the percentage of complete epithelialization or healing rate.Conclusion Adding L-PRF to SOC significantly improved wound healing in patients with DFU independent of the ankle brachial index,SINBAD score,or Wagner grade,indicating that this method is appropriate for DFU treatment under different clinical conditions.

自体富血小板血浆/凝胶联合负压封闭引流术治疗糖尿病足溃疡的荟萃分析

目的评估联合运用自体富血小板血浆/凝胶(PRP/APG)和负压封闭引流技术(VSD)治疗糖尿病足溃疡的效果及安全性。方法应用计算机检索PubMed、EMbase、The Cochrane Library、中国知网(CNKI)、维普、万方数据库,检索应用PRP/APG联合VSD治疗糖尿病足溃疡的随机对照研究,检索时限设为建库至2022年4月。由2名研究人员独立进行文献筛选、数据提取、评估偏倚风险,随后采用RevMan 5.3软件对数据进行荟萃分析并进行总结。结果纳入17篇随机对照研究,涵盖1338例患者,其中观察组(PRP/APG联合VSD)668例,对照组(常规治疗或VSD)670例。Meta分析结果显示,观察组治疗有效率高于对照组[比值比(OR)=7.35,95%可信区间(CI)5.04~10.70,P<0.00001];溃疡愈合时间短于对照组[均数差(MD)=-9.32,95%CI-10.63~-8.01,P<0.00001];住院时间少于对照组(MD=-13.51,95%CI-14.09~-12.92,P<0.00001);并发症发生率低于对照组(OR=0.16,95%CI 0.07~0.38,P<0.00001);对照组血管内皮生长因子(VEGF)浓度低于观察组(MD=4.57,95%CI 3.84~5.31,P<0.00001);观察组碱性成纤维细胞生长因子(bFGF)浓度高于对照组(OR=2.86,95%CI 2.36~3.36,P<0.00001)。结论PRP/APG联合VSD可以有效提高糖尿病足溃疡愈合率,减少愈合时间、住院时间、并发症,并可提高VEGF、bFGF浓度促进溃疡愈合,具有较好的临床疗效。

PRP与SVF-gel辅助自体脂肪移植手术的效果观察

目的探讨富血小板血浆(PRP)与脂肪来源干细胞基质胶(SVF-gel)应用于自体脂肪移植手术的临床效果。方法将2018年2月至2019年9月在我科行自体脂肪移植手术的患者247例根据其自愿选择的移植方案分成对照组和观察组。对照组123例患者采用PRP联合自体脂肪移植手术,观察组124例患者采用SVF-gel辅助自体脂肪移植手术,对2组患者的临床治疗效果、满意度进行观察比较。结果术后6个月,观察组需要进行二次填充的例数明显少于对照组,差异具有统计学意义(P<0.05);观察组患者满意率高于对照组,差异具有统计学意义(P<0.05)。结论与PRP联合自体脂肪移植相比,SVF-gel辅助自体脂肪移植的移植脂肪存活率及术后患者满意度均有明显优势,临床应用效果好。

PRP凝胶与rhGM-CSF凝胶治疗慢性难愈性创面的效果及对创面修复因子的影响

目的比较自体富血小板血浆(PRP)凝胶与重组人粒细胞巨噬细胞集落刺激因子(rhGM-CSF)凝胶治疗慢性难愈性创面的效果及对创面修复因子的影响。方法将80例慢性难愈性创面患者分为PRP组和rhGM-CSF组,各40例。在外科常规治疗基础上,PRP组采用PRP凝胶治疗,rhGM-CSF组采用rhGM-CSF凝胶治疗。比较两组患者创面完全愈合时间,治疗2周后创面愈合率、感染控制水平,治疗前后创面修复因子[血管内皮生长因子(VEGF)、血小板衍生生长因子(PDGF)、碱性成纤维细胞生长因子(bFGF)、表皮生长因子(EGF)]表达量、疼痛视觉模拟量表(VAS)评分。记录两组患者治疗过程中不良反应的发生情况。结果PRP组创面完全愈合时间短于rhGM-CSF组(P<0.05)。治疗2周后,PRP组患者创面愈合率高于rhGM-CSF组;两组患者疼痛VAS评分、白细胞计数及血清C反应蛋白水平均低于治疗前,创面VEGF、PDGF、bFGF、EGF表达量均较治疗前升高,且PRP组患者上述指标均优于rhGM-CSF组(均P<0.05)。两组患者治疗前后的创面细菌培养阳性情况差异无统计学意义(P>0.05)。治疗过程中PRP组无不良反应发生,rhGM-CSF组共出现3例不良反应,两组不良反应总发生率差异无统计学意义(P>0.05)。结论PRP凝胶与rhGM-CSF凝胶对慢性难愈性创面患者的创面愈合情况、疼痛、感染水平等均具有改善作用,而PRP凝胶上述效果优于rhGM-CSF凝胶。

富血小板血浆局部注射联合血小板凝胶覆盖治疗慢性难愈性创面

目的:探讨富血小板血浆(Platelet-rich plasma,PRP)局部注射联合血小板凝胶(Autologous platelet-richgel,APG)治疗慢性难愈性创面(Dermal chronic ulcer,DCU)的疗效。方法:选取2019年2月-2022年2月笔者医院收治的113例DCU患者为研究对象,按随机数表法分为联合组(n=58)和对照组(n=55),两组均给予常规治疗,对照组在此基础上给予APG治疗,联合组在对照组基础上联合PRP局部注射治疗,比较两组治疗后的临床疗效、创面愈合情况、血清炎症因子[C-反应蛋白(CRP)、肿瘤坏死因子-α(TNF-α)、白细胞介素1β(IL-1β)]水平、血清生长因子[血管内皮生长因子(VEGF)、血清促红细胞生成素(EPO)、血清透明质酸(HA)]水平及不良反应发生情况。结果:治疗后,联合组感染控制时间、创面愈合时间及住院时间均明显短于对照组(P<0.05)。治疗2周后,联合组总有效率高于对照组(P<0.05);两组CRP、TNF-α和IL-1β水平均降低(P<0.05),且联合组均明显低于对照组(P<0.05);两组VEGF、EPO和HA水平均升高(P<0.05),且联合组均明显高于对照组(P<0.05)。联合组不良反应总发生率为5.17%,对照组为10.91%,两组比较差异无统计学意义(P>0.05)。结论:PRP局部注射联合APG治疗DCU疗效显著,可有效缓解创面炎症,提高血清生长因子水平,促进创面愈合,安全性好,值得临床推广应用。

自体富血小板凝胶的制备及其生长因子分析

目的探讨不同离心方法制备自体富血小板凝胶(autologous platelet-richgel,APG)的方法,通过改变离心速度比较不同的离心力对PLT富集的影响;分析全血和APG中5种生长因子浓度。方法对13例糖尿病难治性皮肤溃疡患者行APG治疗。取11例自身外周静脉血,分别用3种离心速度制备富血小板血浆(platelet-rich plasma,PRP)。A组(n=6):先以529×g离心4min,再以854×g离心6min;B组(n=5):先以313×g离心4min,再以1252×g离心6min;C组(n=5):先以176×g离心5min,再以1252×g离心5min。将离心后制得的PRP与凝血酶-钙剂以10∶1混合凝固后制备APG,用于患者皮肤溃疡的治疗。采用全自动血细胞分析仪计数各组全血和PRP中PLT数量。采用酶联免疫吸附法测定全血和APG中PDGF-BB、VEGF、IGF-1、EGF和TGF-β15种生长因子浓度。结果A组PRP中PLT数量为(779.67±352.39)×109/L,较全血的(263.50±76.63)×109/L提高(2.98±1.42)倍,差异有统计学意义(P<0.05);PLT回收率为51.5%±22.2%。B组PRP中PLT数量最高,为(1363.80±919.74)×109/L,较全血的(232.80±127.99)×109/L提高(5.91±2.04)倍,差异有统计学意义(P<0.05);PLT回收率为75.2%±21.0%,明显高于A组(P<0.05)。全血和APG中PDGF-BB、EGF、IGF-1以及TGF-β1浓度分别为:(145.94±133.24)、(503.81±197.86)pg/mL,(160.73±71.10)、(265.95±138.43)pg/mL,(14.54±35.34)、(110.56±84.36)ng/mL,(3.31±2.27)、(5.67±4.80)ng/mL,差异有统计学意义(P<0.05);VEGF浓度升高,两者间差异无统计学意义(P>0.05)。对数转换后的PLT数量与PDGF-BB、TGF-β1浓度成正相关,相关系数r分别为0.627和0.437(P<0.05)。13例患者共行18次APG治疗,其中9例治疗12周溃疡愈合,愈合率为69.2%;10例窦道愈合,愈合率为83.3%。结论以313×g离心4min,再以1252×g离心6min是制备PRP的最佳方法;APG中生长因子浓度高于全血;PLT数量与PDGF-BB、TGF-β1浓度成正相关。

自体富血小板凝胶在糖尿病难治性皮肤溃疡中的初步应用

目的评价自体富血小板凝胶(autologous platelet-rich gel,APG)治疗糖尿病难治性皮肤溃疡的有效性和安全性。方法共纳入13例患者;取患者自身外周静脉血,经离心、分离、浓缩制得富含血小板血浆(platelet-rich plasma,PRP),将其与凝血酶-钙剂按一定比例(10∶1)(V/V)混合凝固形成APG,然后用双通注射器将APG均匀喷洒至溃疡表面或注射至深部窦道内。结果13例患者治疗12周后,溃疡愈合率为69.2%(9/13),总有效率为84.6%(11/13);APG治疗后前3周溃疡面积愈合速度最快(P<0.05);APG对窦道治愈率为83.3%(10/12);治疗过程中无不良反应发生。结论APG用于治疗糖尿病难治性皮肤溃疡是安全有效的。

自体富血小板血浆凝胶治疗电烧伤残余创面的疗效观察

目的:探讨自体富血小板血浆凝胶治疗电烧伤残余创面的临床疗效。方法:在我院就诊的72例电烧伤患者,随机分为两组,各36例。观察组根据电烧伤创面深度分为A、B组,A组给予富血小板血浆外敷,B组注射富血小板血浆。对照组按烧伤创面情况分为a、b组,a组覆盖生物皮治疗,b组行断层皮片移植治疗。结果:观察组患者愈合率(83.33%)高于对照组(55.56%),差异具有统计学意义(P<0.05)。A、B组愈合时间少于a、b组愈合时间,差异具有统计学意义(P<0.05)。治疗后2周,观察组患者创面疼痛评分、瘢痕评分明显低于对照组患者瘢痕评分,差异具有统计学意义(P<0.01)。治疗后1、2周,观察组患者血液灌流值高于对照组值,差异均具有统计学意义(P<0.01)。观察组患者不良反应发生率低于对照组,差异具有统计学意义(P<0.05)。结论:自体富血小板血浆凝胶治疗电烧伤残余创面临床疗效显著,能够有效缩短愈合时间,减轻患者疼痛,改善微循环。

自体富血小板血浆凝胶对电烧伤患者创面微循环的影响

目的:探讨自体富血小板血浆凝胶对电烧伤患者创面微循环的影响。方法:选择2013年2月-2014年10月在本院接受治疗的电烧伤患者90例作为研究对象,按随机数字表法分成两组,各45例。对照组接受常规的补液复苏方法治疗。观察组接受常规补液复苏治疗的同时将自体富血小板血浆凝胶敷于创面上。比较两组患者治疗前后的创面微循环灌注量与创面毛细血管充盈时间,同时对比两组患者的创面愈合时间和瘢痕指数。结果:治疗后,观察组创面微循环灌注量高于对照组,观察组创面毛细血管充盈时间短于对照组,观察组创面愈合时间及瘢痕指数评分均少于对照组,两组比较差异均具有统计学意义(P<0.01)。结论:自体富血小板血浆凝胶在改善电烧伤患者创面微循环中发挥出积极显著的作用,同时能够减小创面瘢痕、促进创面的愈合。

自体富血小板血浆修复面神经损伤

背景:周围性面神经损伤治疗包括手术、理疗及药物等方法,但有些情况下治疗效果并不十分理想。目的:研究自体富血小板血浆在面神经损伤修复中的作用。方法:将健康大耳白兔10只双侧面神经上颊支横断后置入硅胶神经再生导管,一侧注入富血小板血浆为实验侧,另一侧注入生理盐水为对照侧。术后8周进行面神经大体观察、神经电生理检测、组织学观察、图像分析、评价面神经再生恢复情况。结果与结论:实验侧口轮匝肌动作电位潜伏期明显低于对照侧,复合神经肌肉动作电位振幅(M波)明显高于对照侧(P<0.01)。实验侧再生神经更显成熟,再生轴突较多,髓鞘分化较好,髓鞘厚度较均匀,再生轴突的直径接近正常,神经轴突较密集,排列较规则,神经纤维外膜较较对照组增厚,胶原纤维、弹力纤维层较对照组增多;对照侧再生轴突数目较少,分布不均匀,轴突发育较差,并见大量纤维结缔组织,空泡变性较实验侧为多。实验侧再生神经在有髓轴突直径、面积、髓鞘厚度及轴突计数等方面均明显优于对照侧,两组差异有显著性(P<0.01)。提示富血小板血浆在面神经损伤修复再生中具有促进作用。

围手术期自体血回收分离机制备富血小板血浆和自体凝血酶的研究

目的验证围手术期使用自体血回收分离机制备富血小板血浆(PRP)的可行性及有效性,探索制备自体凝血酶并用以制备富血小板凝胶(PRG)的方法。方法选取2018年10月至2019年1月在北京积水潭医院行单侧全髋关节置换术的30例患者,按照随机数字法分为观察组和对照组,每组15例。所有患者均在手术前30 min使用自体血回收分离机制备PRP,采血前后检测患者血红蛋白、血小板(PLT)及白细胞(WBC),并检测PRP中的PLT及WBC水平及富集程度。其中,观察组取PRP 1.5 mL加入10%葡萄糖酸钙,经水浴、离心制备自体凝血酶,使用自体凝血酶激活PRP制备PRG;对照组使用10%葡萄糖酸钙激活PRP,30 min内观察并记录两组PRP被激活形成凝胶的时间。结果30例患者PRP制备均完成,血流动力学无明显波动。两组患者的PRP生成量、PLT基础值、PRP中PLT含量及富集度,WBC基础值、PRP中WBC含量及富集度比较差异无统计学意义(P>0.05)。激活物与PRP混合后,观察组12例2 min时凝集成凝胶,3例3 min时凝集;对照组15例30 min时均未凝集。结论围手术期可利用自体血回收分离机制备自体PRP,其所得产物PLT及WBC可达到治疗水平,且使用PRP水浴离心制备自体凝血酶,作为激活剂制备PRG方法可行。

换药处置架在糖尿病足自体富血小板凝胶治疗中的应用

目的探讨换药处置架在糖尿病足自体富血小板凝胶治疗中的应用效果。方法将接受血小板凝胶治疗的糖尿病足溃疡患者100例,随机分为观察组和对照组各50例,对照组在自体富血小板凝胶治疗时采用枕头等软垫使足部抬起或平行放置于床沿处,以充分暴露伤口区域;观察组设计制作换药处置架用于治疗。结果观察组舒适度评分显著高于对照组,换药时间显著短于对照组(均P<0.05)。结论换药处置架操作简便、安全,适用于自体富血小板凝胶治疗糖尿病足部溃疡中的伤口处置。

自体血小板分离在心血管手术中的应用

体外循环(CPB)期间,由于血小板激活和α-颗粒释放,导致血小板减少和功能下降。CPB前,利用自体血小板分离技术可将部分血小板从患者全血中分离出来制成富血小板血浆(platelet-richplasma,PRP),PRP可在术后回输,以达到血小板数量和功能的双重保护,另一方面可将PRP制备成自体血小板胶(autologousplateletgel,APG),APG中含有丰富的生长因子,并且具有足够的抗张强度和粘性,因此可起到术中止血、封闭伤口、促进胸骨及伤口愈合的作用。

PRP与NGF对面神经损伤修复作用的对比研究

目的 :对比研究自体富血小板血浆(platelet rich plasma,PRP)与神经生长因子(NGF)对面神经损伤的修复作用。方法:健康大耳白兔30只,随机分成3组,每组10只,选择一侧面神经上颊支横断后置于硅胶管神经再生室中,分别注入等量的PRP、NGF和生理盐水。术后8周分别进行面神经大体观察、神经电生理检测、组织学观察、图像分析,评价神经再生恢复情况。结果:电生理检测PRP组口轮匝肌动作电位潜伏期低于NGF组,且明显低于对照组(P<0.01);PRP组复合神经肌肉动作电位振幅(M波)高于NGF组,且明显高于对照组(P<0.01)。图像分析PRP组再生神经有髓轴突面积、髓鞘厚度及轴突计数高于NGF组,且明显高于对照组(P<0.01)。结论:PRP促进面神经损伤修复作用优于NGF。

Preliminary separation of the growth factors in platelet-rich plasma： effects on the proliferation of human marrow-derived mesenchymal stem cells

Background Platelet-rich plasma （PRP） as a storage vehicle of growth factors has been successfully used in clinical applications, but in most cases the platelets were autologous. However, the large volume of blood withdrawn has detrimental effects on patients with anemia or poor general health. To overcome these limitations, this study was designed to separate the growth factors in homologous platelet-rich plasma.Methods The gel chromatography with Superdex-75 column fractions. Then the four fractions were vacuumed freeze-dried was applied to separate PRP supernatants into 4 major and re-dissolved in phosphate buffered saline. Proteins concentrations in PRP and in four fractions were detected by bicinchoninic acid protein assay; platelet derived growth factor-AB （PDGF-AB） and transforming growth factor β1 （TGF-β1） levels were determined by sandwich enzyme-linked immunosorbent assays. The effects of fractions on the proliferation of human marrow-derived mesenchymal stem cells （MSCs） were determined by 3-（4, 5- dimethylthiazol-2-yl）-2, 5-diphenyltetrazolium bromide （MTT） assay.Results PRP supernatants were separated into four major fractions by gel chromatography. The proteins recovery was 96.72%. Of the four fractions, fraction B contained the highest TGF-β1 and PDGF-AB levels, and the highest proteins concentrations. Cell proliferation curves of MSC demonstrated that fraction B and C induced a remarkable increase of MTT values compared to the untreated culture （P 〈0.05）, and the effects of fraction B and C showed no significant difference compared to the PRP group （P 〉0.05）. Fraction A and D showed no significant difference to the negative control group （P 〉0.05）. Conclusions The growth factors in PRP supernatants could be preliminarily separated into four fractions by gel chromatography, and the freeze-drying fractions retained the biological activity of growth factors. The growth factors were mostly presented in fraction B and C, and they promoted cell proliferation effectively.