Recombinant human epidermal growth factor combined with vacuum sealing drainage for wound healing in Bama pigs

Background:Vacuum sealing drainage(VSD)and epidermal growth factor(EGF)both play an important role in the treatment of wounds.This study aims to explore the effects of the combination of VSD and EGF on wound healing and the optimal concentration and time of EGF.Methods:We tested the proliferation and migration capacity of HaCaT and L929 cells at different EGF concentrations(0,1,5,10,and 100ng/ml)and different EGF action times(2,10,and 30min).A full-thickness skin defect model was established using male,30-week-old Bama pigs.The experiment included groups as follows:routine dressing change after covering with sterile auxiliary material(Control),continuous negative pressure drainage of the wound(VSD),continuous negative pressure drainage of the wound and injection of EGF 10min followed by removal by continuous lavage(V+E 10min),and continuous negative pressure drainage of the wound and injection of EGF 30min followed by removal by continuous lavage(V+E 30min).The wound healing rate,histological repair effect and collagen deposition were compared among the four groups.Results:An EGF concentration of 10ng/ml and an action time of 10min had optimal effects on the proliferation and migration capacities of HaCaT and L929 cells.The drug dispersion effect was better than drug infusion after bolus injection effect,and the contact surface was wider.Compared with other groups,the V+E 10min group promoted wound healing to the greatest extent and obtained the best histological score.Conclusions:A recombinant human epidermal growth factor(rhEGF)concentration of 10 ng/ml can promote the proliferation and migration of epithelial cells and fibroblasts to the greatest extent in vitro.VSD combined with rhEGF kept in place for 10min and then washed,can promote wound healing better than the other treatments in vitro.

Effect of recombinant human epidermal growth factor on porcine partial-thickness wound healing

Wound healing is a complex biologic event. Numerous growth factors are involved in the regulation of tissue repair and remodelling processes. In this study, several techniques were used to observe the effects of recombinant human epidermal growth factors (rh-EGF) on porcine partial-thickness burn wound healing. Healing rates of the burn wounds were quantitated by computer image analysis of the wound Pkotographs. Biopsies were taken for examining the cell DNA cycle by flow cytometry, and for observing the keratinocyte migration and degree of reepithelialization quantitated by anti-keratin antibodies. The results indicated that daily topical application of rh-EGF in suitable concentrations accelerated epithelial healing of partial-thickness burn wounds, and there was also a dose-dependent effect of rh-EGF on healing rates of the partial-thickness burn wounds.

EXPRESSION OF EPIDERMAL GROWTH FACTOR, TRANSFORMINGGROWTH FACTOR-α AND THEIR RECEPTOR IN HUMAN PITUITARY TUMORS

Objective: To explore the role of growth factor autocrine stimulation in the pathogenesis of human pituitary tumors. Methods: The expression of EGF, TGF-( and EGFR were studied by immunohisto-chemical method on paraffin-embedded sections of 30 cases pituitary tumor. Results: EGFR and its ligands EGF, TGF-( expressed in majority of pituitary tumors. The expression of EGFR and its ligands varied with cells' intensity, density and type. Conclusion: The EGF autocrine stimulating exerted in the pituitary tumor development process, that tyrosine kinases inhibitors may be useful for pituitary tumors treatment.

Effect of substance P released from peripheral nerve ending on endogenous expression of epidermal growth factor and its receptor in wound healing

Objective: To explore the relationship between substance P (SP) released from peripheral nerve endings and the expression of epidermal growth factor (EGF) and epidermal growth factor receptor (EGFR) during wound healing. Methods: Fifty Wistar rats were randomly divided into 2 groups, injury group and capsaicin group. In the injury group, a full thickness skin wound on the back of the rat was taken. The wound edge and granulation tissues were taken on the 1st, 3rd, 6th, 9th, 12th days after injury, respectively. In the capsaicin group, capsaicin was injected subcutaneously on the back of the rats to destroy the sensory nerve to prevent the secretion of SP, then a wound and sample was made in the same way. Immunohistochemistry and in situ hybridization were employed to detect the expression of SP, EGF/EGFR, and EGF mRNA/EGFR mRNA in the granulation tissues. Results: In the injury group, immunohistochemical stain of SP and EGF/EGFR was located on the hair follicles and sebaceous glands at the 1st day. And the stain of SP was obvious at the 3rd day in the granulation tissues, then decreased gradually. EGF/EGFR was at low level at the 3rd day, then increased gradually and reached the peak at the 9th day, then declined. In the capsaicin group, the immunohistochemical stain of SP and EGF/EGFR was faint and without obvious change during the wound healing process. The tendency of the EGF mRNA/EGFR mRNA expression was similar to that of EGF/EGFR.Conclusions: During wound healing, SP may promote the healing process by affecting the expression of EGF/EGFR in the granuation tissues.

Effect of combination therapy with alginate dressing and mouse epidermal growth factor on epidermal stem cells in patients with refractory wounds

Background The aim of this research was to determine the efficacy of combination therapy using an alginate dressing and mouse epidermal growth factor （mEGF） on proliferation and differentiation of epidermal stem cells （ESCs） in patients with refractory wounds.Methods Eighteen patients （12 males and 6 females,aged from 18 to 61 years （mean 36.4 years）） with various skin wounds,were treated by dressing changing for one month.The wounds were located in the foot （11）,calf （3）,thigh （2）and forearm （2）.The patients were randomly divided into 3 groups：alginate dressing and mEGF （group A; n=6）,mEGF （group B; n=6） and control （group C; n=6）.Wound closure indexes were measured at 7,14,21 and 28 days.Samples were harvested for pathologic examination,at 7 and 14 days following treatment.Cytokeratin 10 （CK10） and cytokeratin 15 （CK15） positive cells were evaluated using the super-sensitivity （SP） immunohistochemical staining technique.Results Wound healing was promoted in groups A and B.In group A,the wound closure index was increased significantly （P 〈0.05）,and in one case the maximum cure area reached 102 cm2.Pathological examination identified a thicker epidermis,active angiogenesis and enhanced granulation in group A compared with groups B and C.Using the SP immunohistochemical staining technique,we showed that ESCs in group A were bigger in size and larger in number than in groups B and C.Overall,there was a significant difference in ESCs proliferation and differentiation between group A and group B （or C）.Conclusions Combination therapy using an alginate dressing and mEGF shows increased proliferation and differentiation of ESCs in patients with refractory wounds compared with those treated with mEGF alone.

Study of therapeutic effects of EGF and PDWHF on nonhealing cutaneousulcers in patients with diabetes mellitus

Objective:To study the therapeutic effects of epidermal growth factor (EGF) and platelet-derived wound healing factor (PDWHF) on the nonhealing cutaneous ulcers in 78 patients with diabetes mellitus. Methods: Seventy-eight patients were divided into group A in which the patients were treated with saline to serve as the control, group B in which the patients were treated with EGF and group C treated with PDWHF. General healing practice was administered. Wound closure index, healing rate and histological changes of the ulcerative wounds of the patients were observed in the treatment period of 8 weeks. Results:The wond closure index and healing rate were more significantly increased in groups B and C than in group A of the control with far more angiogenesis , fibroblast hyperplasia and collagen deposition in the former than in the latter. The therapeutic effects of PDWHF seemed to be superior to those of EGF.Conclusion :It is suggested that the local application of a certain growth factor or of a combination of several growth factors in an efficient management to improve the healing of diabetic cutaneous ulcers.

叶绿素衍生物对痔术后创面愈合的促进作用

目的探讨叶绿素衍生物对痔术后创面愈合的影响。方法选取行吻合器痔上黏膜环切术(PPH)的环形痔术后患者124例,分为对照组和试验组。比较2组肉芽形成时间、创面愈合时间,治疗前后创面水肿和疼痛程度,血清生化指标,不良反应和并发症。结果试验组肉芽形成时间、创面愈合时间均短于对照组,治疗后2组创面水肿和疼痛评分、血清肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)水平均降低,且治疗后试验组均低于对照组,试验组上述指标治疗前后差值均高于对照组,治疗后2组血清表皮生长因子(EGF)、纤维连接蛋白(FN)、碱性成纤维细胞因子(bFGF)水平均升高,且治疗后试验组均高于对照组,差异有统计学意义(P<0.05)。结论叶绿素衍生物可促进痔术后肉芽形成与创面愈合,减轻患者水肿和疼痛。

负压治疗+表皮生长因子对深度大面积烧伤患者创面恢复的影响

目的 分析负压治疗+表皮生长因子对深度大面积烧伤患者恢复的影响。方法 研究对象选取2021年1月至2023年1月收治的100例深度大面积烧伤患者,分为对照组和观察组,每组50例。对照组给予表皮生长因子+护理干预,观察组给予负压治疗+表皮生长因子+护理干预。比较2组炎性因子、基质金属蛋白酶水平、创面愈合情况、疼痛程度、瘢痕VSS评分。结果 治疗后2组患者细胞间黏附分子-1(ICAM-1)、肿瘤坏死因子-α(TNF-α)、基质金属蛋白酶-2(MMP-2)、基质金属蛋白酶-9(MMP-9)水平下降,且观察组较低,白细胞介素-10(IL-10)水平上升,且观察组较高(P<0.05)。与对照组比较,观察组愈合时间较短,温哥华瘢痕量表(VSS)评分较低(P<0.05);与治疗后7 d比较,治疗后14 d、治疗后21 d 2组创面愈合率上升,且观察组较高,数字疼痛评分(NRS)降低,且观察组较低(P<0.05);与治疗14 d后比较,治疗后21 d 2组创面愈合率上升,且观察组较高,NRS评分降低,且观察组较低(P<0.05)。结论 深度大面积烧伤患者采用负压治疗+表皮生长因子治疗后炎性反应、疼痛程度减轻,创面愈合速度加快。

中药浸浴联合重组表皮细胞在压疮患者中的应用效果

目的探究中药浸浴联合重组表皮细胞在压疮患者中的应用效果。方法选取2022年1月至2023年6月贵溪市中医院收治的60例压疮患者作为研究对象,采用随机数字表法将其分为对照组与观察组,每组各30例。对照组采用重组表皮细胞生长因子方法,观察组在对照组基础上使用中药浸浴,分析两组干预后的创面愈合有效率、炎症因子水平、症状缓解时间、转化生长因子(TGF-β1)、血管内皮生长因子(VEGF)表达水平以及不良反应发生率。结果治疗前两组的TGF-β1、VEGF表达水平、炎症因子水平比较,差异无统计学意义(P>0.05)。观察组治疗后TGF-β1、VEGF表达水平以及炎症因子水平均低于对照组,差异有统计学意义(P<0.05)。观察组症状缓解时间、不良反应发生率低于对照组,差异有统计学意义(P<0.05)。观察组创面愈合总有效率高于对照组,差异有统计学意义(P<0.05)。结论在临床上对压疮创面修复中采用重组表皮细胞生长因子联合中药浸浴效果更好,患者创面愈合有效率提高,症状缓解时间缩短,不良反应发生率少,安全性高且效果显著,临床应用价值高。

重组人表皮生长因子软膏对烧伤创面修复的促进作用

目的 探讨重组人表皮生长因子 (rh EGF)软膏治疗烧伤的有效浓度 ,并观察对创面愈合的促进作用。方法 将 12 0例烧伤患者分为两部分 ,第一部分选择 15例浅 °烧伤患者 ,采用开放实验 ,分三组每组 5例 ,进行三种不同浓度 rh EGF软膏 (0 .5 μg/ g,10 μg/ g,5 0 μg/ g)的疗效比较 ,确定临床使用浓度。第二部分 ,选择浅 °和深 °烧伤患者10 5例为试验对象 ,在第一部分研究的基础上选取最适药浓度 ,进行多中心随机双盲实验 ,所有患者均采用自身对照。以创面愈合为指标 ,判断创面愈合时间 ,并观察创面动态愈合率及不良反应。结果 第一部分患者 10 μg/ g和 5 0 μg/ g组的创面愈合时间差异不显著但较 0 .5 μg/ g组明显缩短 ,有统计学意义 (P<0 .0 1)。第二部分选用 10 μg/ g浓度的 rh EGF软膏与水溶性软膏基质进行随机双盲研究。浅 °创面用药组愈合时间为 (8.39± 2 .2 5 )天 ,空白对照组为 (9.5 2± 2 .5 6 )天 ,组间比较具有统计学意义 (P<0 .0 1) ;用药组不同时间内的愈合率较对照组明显提高 ;深 °创面愈合时间用药组、对照组分别为 (16 .80± 2 .99)天 ,(18.2 7± 3.17)天 ,组间比较有统计学意义 (P<0 .0 1)。结论 rh EGF软膏对烧伤创面有明显的促进修复作用 ,且 10 μg/

重组人表皮细胞生长因子治疗烧伤创面研究

目的 探讨外用重组人表皮细胞生长因子 (rh EGF)治疗 度烧伤创面最佳用药方式。 方法 2 0 0 0年6月～ 2 0 0 1年 12月对 6 0例浅 度和深 度烧伤患者共 180个创面进行随机双盲实验 ,每例患者设 A、B、C 3个治疗区。A区为 SD- Ag对照治疗区 ,1% SD- Ag霜涂创面 ,每日 1次 ;B区为 rh EGF治疗区 ,rh EGF4 0 U/ cm2 直接喷在创面上 ,每日 1次 ;C区为 rh EGF和速愈平混合治疗区 ,rh EGF4 0 U/ cm2和速愈平 5 g混合涂在创面上 ,每日 1次 ;每日观察记录 3个治疗区变化 ,直至创面愈合停止用药 ;愈合 1周后检查创面外观、皮肤弹性 ,并行统计学处理。 结果 浅 度创面 A区愈合时间为 (13.2 0± 2 .4 0 )天 ,B区为 (10 .2 0± 2 .2 0 )天 ,C区为 (8.72± 2 .31)天 ,组间比较有统计学意义 (P<0 .0 1) ;深 度创面 A区愈合时间为 (2 0 .10± 3.4 0 )天 ,B区为 (17.2 0± 3.12 )天 ,C区为 (15 .10± 3.81)天 ,组间比较有统计学意义 (P<0 .0 1和 P<0 .0 5 )。治疗期中 A区渗出液、创缘炎性反应均较 B、C区显著。深 度创面愈合后 B、C区无充血 ,有弹性和韧性 ;A区充血 ,无弹性和韧性。 结论 rh EGF对烧伤创面有明显促愈合作用 ,可改善愈合质量。rh EGF和速愈平联合使用对缩短创面愈合时间及提高愈合质量作用?

壳聚糖对大鼠Ⅲ度烧伤创面EGF和PDGF表达的影响

目的研究壳聚糖对大鼠Ⅲ度烧伤创面表皮生长因子(EGF)和血小板源性生长因子(PDGF)表达的影响。方法W istar大鼠分为1%壳聚糖组(W/V)、2%壳聚糖组(W/V)、4%壳聚糖组(W/V)、成纤维细胞生长因子(贝复剂)组(阳性对照组)、自然愈合组(模型组),制备成大鼠Ⅲ度烧伤模型,采用免疫组织化学SABC法、原位杂交法及图像分析法检测大鼠Ⅲ度烧伤创面EGF和EGFmRNA的表达;PDGF的活性用L929细胞生物法测定。结果4%壳聚糖组(W/V)对烧伤后7、14 d创面EGF的表达、对烧伤后3、7 d创面EG-FmRNA的表达有明显的提高;对烧伤后3、7、14 d创面PDGF的活性有明显的提高,与自然愈合组相比,差异均有显著性(P<0.05)。结论壳聚糖对大鼠Ⅲ度烧伤创面的EGF表达和PDGF活性有促进作用。

多种生长因子促糖尿病患者难愈合性创面愈合的临床研究

目的 观察多种生长因子治疗糖尿病难愈合性创面的临床效果，并探讨其可能的机制。方法 将７８ 例糖尿病患者分为三组，即生理盐水对照组、表皮细胞生长因子（ Ｅ Ｇ Ｆ）治疗组、血小板源伤口愈合因子（ Ｐ Ｄ Ｗ Ｈ Ｆ）治疗组。观察治疗后１～８ 周创面闭合指数、创面治愈率及组织形态学变化。结果 Ｅ Ｇ Ｆ组、 Ｐ Ｄ Ｗ Ｈ Ｆ组的创面闭合指数、创面治愈率较对照组明显增加，其肉芽组织毛细血管与成纤维细胞增生、胶原沉积和表皮覆盖明显，尤以溃疡与正常组织交界处明显。组间比较发现， Ｐ Ｄ Ｗ Ｈ Ｆ的促愈合作用优于 Ｅ Ｇ Ｆ。结论 局部应用多种生长因子可治疗糖尿病难愈合性创面，生长因子单独或配伍使用是改善糖尿病患者创面愈合受阻的有效措施。

不同剂型重组人表皮生长因子对烧伤创面促愈合作用比较

目的：比较重组人表皮生长因子（ｒｈＥＧＦ）凝胶剂和水溶液剂治疗烧伤创面的临床疗效。方法：选择烧伤浅Ⅱ°、深Ⅱ°和新鲜供皮区创面为受试对象，将创面分成Ａ、Ｂ两区，采用随机自身对照试验。试验组用重组人表皮生长因子凝胶治疗，对照组用重组人表皮生长因子水溶液治疗，每日换药一次，观察不同时间内创面动态愈合率及愈合时间。结果：重组人表皮生长因子凝胶治疗的烧伤浅Ⅱ°、深Ⅱ°和新鲜供皮区创面其愈合时间较重组人表皮生长因子水溶液组有明显缩短（Ｐ＜０．０１）；动态愈合率也明显加快，组间具有非常显著性差异。结论：重组人表皮生长因子凝胶剂用干烧烫伤、新鲜供皮区创面的治疗均有较好的促进修复作用，临床效果优于重组人表皮生长因子水溶液剂组，提示重组人表皮生长因子的剂型是影响临床效果的重要因素，重组人表皮生长因子的药理作用因剂型的不同而存在差异。

丹参对体外培养成纤维细胞自分泌生长因子的影响

目的 探讨丹参作用于成纤维细胞 ,减轻创面过度愈合的作用机制。方法 体外培养的成纤维细胞第4～ 6代 ,经不同浓度丹参 (40、80、1 60和 32 0μg/ ml)及不同时间 (1、2、3、4和 5天 )培养后 ,加入丹参 (浓度 60μg/ ml)作用后 ,采用 ELISA法和放射免疫法测定其自分泌转化生长因子 -β1 (TGF-β1 )及表皮生长因子 (EGF)的变化规律。 结果 丹参可抑制成纤维细胞自分泌 TGF- β1 ,且随浓度的增大及作用时间的延长而增强 ,具有统计学意义 (P<0 .0 5) ;但对EGF的自分泌无抑制作用 (P>0 .0 5)。 结论 丹参可选择性抑制 TGF-β1 的自分泌 ,抑制成纤维细胞的增殖及减少细胞外基质的沉积 。

重组人表皮生长因子联合硫辛酸治疗糖尿病足的临床观察

目的:考察重组人表皮生长因子(rh EGF)联合硫辛酸对糖尿病足患者的临床疗效及安全性。方法:选取68例糖尿病足患者按照随机数字表法分为观察组和对照组,各34例。两组患者均给以基础治疗和硫辛酸注射液0.6 ml加入0.9%氯化钠注射液250 ml,ivgtt(避光),qd;观察组患者在此基础上给予rhEGF外用溶液1 ml均匀喷洒创面,给予凡士林涂抹创面,用医用干纱布包扎,qd。两组患者疗程均为7 d。比较两组患者的临床疗效、溃疡面积、B淋巴细胞瘤基因2(Bcl-2)、Bcl-2相关X蛋白(Bax)蛋白表达水平,以及不良反应发生情况。结果:观察组患者总有效率(94.1%)明显高于对照组(67.6%),差异有统计学意义(P<0.05)。治疗前,两组患者溃疡面积、Bcl-2和Bax水平比较,差异均无统计学意义(P>0.05)。治疗后,两组患者溃疡面积均明显缩小,Bcl-2水平较治疗前均明显升高,Bax水平明显降低,且观察组患者的改善程度明显大于对照组,差异均有统计学意义(P<0.05)。两组患者不良反应发生率比较,差异无统计学意义(P>0.05)。结论:rh EGF联合硫辛酸治疗糖尿病足临床疗效较好,且完全性较好。

胰岛素与重组人表皮生长因子局部联合应用对大鼠深Ⅱ度烫伤创面愈合的影响

目的:观察局部联合应用胰岛素与重组人表皮生长因子对烫伤大鼠创面愈合的影响。方法:96只SD大鼠随机分为4组,制作深Ⅱ度烫伤大鼠模型。创面下浸润注射等渗盐水(A组)作为对照组,B组烫伤大鼠创面下浸润注射0.1U胰岛素,C组创面下浸润注射600IU重组人表皮生长因子,D组予B、C组相同剂量二者联合治疗。记录各组创面愈合时间,伤后3d起隔日计算4组的创面愈合百分率。观察各组创面愈合后的组织形态学改变,并测定血糖浓度的变化。结果:D组创面愈合时间较其他3组明显缩短(P<0.05)。伤后第7、11、14、17、21天D组创面愈合率高于其他组(P<0.05)。组织学检查D组创面收缩与再上皮化明显,新生上皮向创面中心爬行较快,成纤维细胞与毛细血管肉芽数量明显多于其他组。注射后7h,A组和C组血糖浓度变化不大(P>0.05),B、D两组注射后1h血糖浓度下降(P<0.05),注射后5h开始恢复正常。结论:局部联合应用重组人表皮生长因子和胰岛素可通过协同作用加速深度烫伤大鼠创面愈合。

重组人表皮生长因子对4种创面的疗效

目的:观察外用重组人表皮生长因子(rhEGF)对临床上4种创面的疗效和安全性。方法:随机选择颜面部浅Ⅱ度、深Ⅱ度烧伤创面、大腿中厚供皮区创面和糖尿病足部溃疡创面共134例,前3者选择自身相应部位和相同深度创面傲自身对照,各占30例;糖尿病足部溃疡44例分为治疗组与对照组各22例;治疗组采用20mL生理氯化钠溶液稀释rhEGF后用于创面,对照组单用抗生素纱布覆盖创面,每日换药1次至创面愈合。结果:治疗组与对照组相比创面愈合速度加快,同期愈合率提高,愈合时间缩短,治疗过程未见明显不良反应。结论:应用rhEGF能显著加快4种创面愈合速度,提高愈合质量,安全性好。

外源性rhEGF对放射复合创伤伤口愈合的促进作用

采用宏观、光镜、免疫组化 (显示Ⅲ型胶原 )和原位杂交 (检测Ⅰ、Ⅲ型胶原mRNA)等方法 ,动态观察外用rhEGF对大鼠放射复合创伤伤口愈合病变过程的影响。结果表明 :①rhEGF可促进放射复合伤口内肉芽组织的形成。伤后 7天见rhEGF用药创面肉芽组织含量较对照创面明显增多。②rhEGF可促进血管生成。伤后 7天见EGF用药创面肉芽组织中有较对照创面明显增多的新生毛细血管网。③应用rhEGF可间接增加Ⅰ、Ⅲ型胶原的合成和分泌。④rhEGF可促进表皮重建 ,使用药创面较对照创面提前约 2天愈合。

骨髓间充质干细胞促进大鼠皮肤创面愈合的作用及机制研究

目的探讨骨髓间充质干细胞(mesenchymalstemcells,MSCs)对大鼠皮肤创面的促愈作用及机制,为临床皮肤损伤修复提供新的治疗方法。方法建立大鼠背部皮肤全层切割伤模型,将大鼠分为2组:空白对照组,MSCs处理组,分别于伤后3、6、9、12d采用大体观察,常规组织学检查观察2组大鼠背部皮肤伤口愈合状况及RT-PCR观察转化生长因子(TGF-β1)、表皮生长因子(EGF)mRNA在愈合中的变化特点。结果MSCs处理组大鼠皮肤愈合快,愈合指数高,创伤后第3天MSCs处理组大鼠皮肤TGF-β1上调明显,第6天EGF上调明显。结论MSCs能促进大鼠皮肤创面愈合,其机制可能与其引起各种生长因子的合成和分泌有关。