A型肉毒毒素对增生性瘢痕组织中TGF-β1和Ⅰ型胶原蛋白mRNA表达的影响

目的:探讨A型肉毒毒素(botulinum toxin A,BTXA)对增生性瘢痕组织成纤维细胞中TGF-β1和Ⅰ型胶原蛋白表达的影响。方法:组织块法培养增生性瘢痕组织及正常皮肤组织的成纤维细胞,用不同浓度的BTXA作用于体外培养的人增生性瘢痕成纤维细胞,检测MTT值;将浓度为0.2U/ml、0.4U/ml、0.8U/ml BTXA作用于增生性瘢痕成纤维细胞48h,利用RT-PCR检测BTXA对TGF-β1和Ⅰ型胶原蛋白m RNA的表达量。结果:BTXA在体外能明显抑制增生性瘢痕成纤维细胞的增殖,随着药物浓度的增加及时间的延长,其抑制作用明显增强,能够减少TGF-β1和Ⅰ型胶原蛋白m RNA的表达,且随着药物浓度的增加,TGF-β1和Ⅰ型胶原蛋白m RNA的表达量呈下降趋势。结论:BTXA通过抑制瘢痕组织中成纤维细胞的增殖,减少TGF-β1和Ⅰ型胶原蛋白m RNA的表达,减少细胞外基质的异常沉积来影响增生性瘢痕的形成。     

A型肉毒毒素对增生性瘢痕成纤维细胞的影响

目的：探讨h型肉毒毒素（BTXA）对体外培养增生性瘢痕成纤维细胞凋亡的影响，以期指导临床治疗。方法：体外培养3例不同部位增生性瘢痕成纤维细胞，应用流式细胞技术（FCM）检测在常规浓度5U／0．1ml BTXA作用72h成纤维细胞的凋亡情况；光镜检测细胞形态学变化；并用透射电镜（TEM）观察细胞超微结构的变化。结果：常规浓度BTXA可以诱导体外培养的成纤维细胞发生凋亡现象，不同部位的增生性瘢痕成纤维细胞空白对照组与加药组凋亡率比较具有统计学意义（P〈0．05）。透射电镜也相应观察到凋亡细胞的典型结构变化。结论：h型肉毒毒素对增生性瘢痕具有一定的治疗前景，其疗效可能是通过促进成纤维细胞凋亡，减少胶原分泌来实现的。     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

目的 研究A型肉毒毒素对兔耳增生性瘢痕组织的影响.方法 8只日本大耳白兔,体重3 kg,建立兔耳增生性瘢痕模型.将兔耳创面分为A型肉毒毒素治疗组(T组)和瘢痕组(S组),每组48个创面.大体观察创面愈合时间和瘢痕增生情况.术后28 d,同法另取4只兔子的兔耳腹面健康皮肤为空白组(B组),收集标本.测量S、T组标本HE切片的瘢痕增生指数HI,流式细胞仪分析2组标本中成纤维细胞的细胞周期,western-blot检测S、T、B组标本中Ⅰ、Ⅲ型胶原的蛋白表达.结果 ①T组标本的瘢痕增生指数HI较S组显著降低,P<0.01;②蛋白水平上,T组的胶原Ⅰ、Ⅲ蛋白表达和胶原Ⅰ/Ⅲ比值均较s组显著降低,P<0.01;③S组分布于G2-M期和S期的成纤维细胞较T组显著增多,而静止期G0-G1的细胞则显著减少,P<0.05.结论 A型肉毒毒素局部应用能抑制兔耳增生瘢痕的形成.抑制成纤维细胞的增殖活性,减少瘢痕组织中Ⅰ、Ⅲ型胶原的合成,降低胶原Ⅰ/Ⅲ比值,为其治疗增生性瘢痕的临床应用提供了一定的理论依据.     

A型肉毒毒素局部应用对兔耳增生性瘢痕创面愈合和瘢痕增生的影响

Objective To investigate the effect of botulinum toxin type A (Botox A) injection on hypertrophic scar in rabbit ear model. Methods The hypertrophic scar model was established in 16 Japanese rabbits' ears. These wounds were divided into two groups as group T(treated with Botox A, n =48) and group S (not treated, n = 48). The wounds healing times and scar hypertrophy were observed with 8 specimen of normal skin at the rabbit ears as sham group B. HE stain was used to assess the hypertrophic index(HI). The expression of collagen Ⅰ and Ⅲ was tested by western-blot. The cell cycle of fibroblasts was studied by flow cytometry. Results The [] was significantly lower in group T than in group S(P < 0.01). The expression of collagen Ⅰ and Ⅲ, as well as the ratio of Ⅰ to Ⅲ, was markedly stronger in group S than in group T(P < 0.01). Compared with group T, more fibroblasts were in G2-M in gToup S and fewer in G0-G1 (P <0.05). Conclusions Local injection of Botox A can inhibite the formation of hypertrophic scar and the activity of fibroblasts in rabbit ear model. It can significantly decrease the expression of collagen Ⅰ and Ⅲ in hypertrophic scar, as well as the ratio of collagen Ⅰ to Ⅲ. It serves as the basis for the treatment of hypertrophic scar with Botox A.     

A型肉毒毒素治疗挛缩性瘢痕

目的 探索A型肉毒毒素(botulinum toxin type A,BTXA)治疗挛缩性瘢痕的疗效.方法 选取26例挛缩性瘢痕患者,随机分为A型肉毒毒素组(BTXA组)和曲安奈德组(TAC组,对照组),注射药物治疗前测量各组患者瘢痕长轴长度,并于注射后再次测量其长度,1次/月,共6次,通过比较治疗前后差值评价药物疗效.切取各组瘢痕组织行免疫组织化学检测,观察α平滑肌肌动蛋白(α-SMA)及肌球蛋白-Ⅱ的表达情况.结果 药物作用1个月后,BTXA组较TAC组瘢痕挛缩程度明显减轻(P＜0.05),尤以6个月时差异最明显,BTXA组和TAC组瘢痕长轴长度差值分别为(1.23±0.42) cm和(0.56±0.33) cm.免疫组织化学结果显示,BTXA组瘢痕内α-SMA及肌球蛋白-Ⅱ表达较TAC组明显减少(P＜0.05).结论 A型肉毒毒素治疗挛缩性瘢痕操作简单、效果明显,值得推广应用.     

不同时期注射A型肉毒毒素对兔耳增生性瘢痕的影响

目的 探讨不同时期注射A型肉毒毒素对兔耳增生性瘢痕的影响,以期发现A型肉毒毒素抑制瘢痕的最佳时间.方法 自2018年9月到2019年3月华中科技大学同济医学院动物实验中心选取健康的新西兰大耳兔18只,兔耳健全,雌雄不限,体质量2～3 kg,制作瘢痕模型.根据A型肉毒毒素注射时间分为即刻组(A组)、10 d组(B组)、3...     

基于TGF-β1/Smad通路探讨A型肉毒毒素对增生性瘢痕的抑制作用及机制

目的：探讨A型肉毒毒素(BTXA)通过TGF-β₁/Smad通路对增生性瘢痕成纤维细胞抑制作用及其机制。方法：体外培养增生性瘢痕成纤维细胞,采用0.2、0.4、0.8 U/ml的BTXA处理成纤维细胞,分别作为0.2 U/ml BTXA组、0.4 U/ml BTXA组、0.8 U/ml BTXA组,空白对照组不采用BTXA(0 U/ml)处理,0.8 U/ml BTXA+TGF-β₁组用0.8 U/ml BTXA和10 ng/ml的TGF-β₁激活剂处理。甲基噻唑基四唑(MTT)法检测细胞活力;流式细胞术检测细胞凋亡率和细胞周期;蛋白质印迹法(Western blot)检测细胞周期蛋白(CyclinD1)、增殖细胞核抗原(PCNA)、Smad2/3、p-Smad2/3蛋白表达。结果：与空白对照组比较,0.2、0.4、0.8 U/mlBTXA显著降低增生性瘢痕成纤维细胞活力和PCNA蛋白表达,差异有统计学意义(P<0.05)。与空白对照组比较,0.2、0.4、0.8 U/ml的BTXA显著提高增生性瘢痕成纤维细胞凋亡...     

A型肉毒毒素治疗挛缩性瘢痕的初步研究

目的：探讨A型肉毒毒素（BTXA）治疗挛缩性瘢痕的效果及其作用机制.方法：10例烧伤后挛缩性瘢痕患者,每人选取两处挛缩性瘢痕,随机分为BTXA组（瘢痕内注射BTXA,间隔3个月1次,共2次）和空白对照组（瘢痕内注射等积生理盐水）,于注射前及首次注射后1、3、6个月测量瘢痕长轴长度,观察其长度变化用以反映瘢痕挛缩程度;切取5例药物治疗6个月后行瘢痕切除手术患者的瘢痕组织,HE染色观察病理学改变,免疫组化染色观察α-平滑肌肌动蛋白及肌球蛋白-Ⅱ的表达.结果：BTXA组较空白对照组瘢痕挛缩程度明显减轻（P〈0.01）,尤以6个月时差异明显[（1.103±0.158）cm比（0.187±0.221）cm].常规HE染色观察到BTXA组瘢痕组织内胶原纤维排列稀疏且规则,瘢痕内成纤维细胞数量较空白对照组减少.免疫组化结果显示BTXA组瘢痕内α-平滑肌肌动蛋白及肌球蛋白-Ⅱ表达较空白对照组明显减少（P〈0.01）.结论：BTXA可用于治疗挛缩性瘢痕,作用机制可能与BTXA能够抑制瘢痕内成纤维细胞中α平滑肌肌动蛋白及肌球蛋白-Ⅱ的表达有关.     

A型肉毒毒素对瘢痕疙瘩成纤维细胞TGF-β/Smad通路和ERK通路表达的影响

目的:探讨A型肉毒毒素对人瘢痕疙瘩成纤维细胞(Human keloid fibroblasts,HKF)生物学行为和TGF-β/Smad信号通路和ERK信号通路表达的影响。方法:在HKF培养过程中加入A型肉毒毒素进行干扰,观察A型肉毒毒素对瘢痕疙瘩成纤维细胞TGF-β/Smad通路和ERK通路相关分子的变化及细胞增殖、侵袭、凋亡情况。结果:A型肉毒毒素可以抑制HKF增殖、迁移和侵袭,促进凋亡,并且明显抑制Ⅰ型胶原、Ⅲ型胶原、纤维连接蛋白、α-SMA和CTGF基因的表达水平,上调IFN-γ、TGF-β3基因的表达水平。上调Smad7基因和蛋白的表达,下调VEGF基因表达,明显抑制p-Smad2和p-Smad3蛋白表达水平,并且抑制P-ERK1/2蛋白表达。以上生物学变化均且呈药物浓度依赖性。结论:A型肉毒毒素可抑制HKF的增殖、侵袭、血管生成和胶原积累,这些效应与TGF-β/Smad和ERK1/2信号通路有关。     

A型肉毒毒素预防与治疗早期增生性瘢痕的临床初探

目的 探索A型肉毒毒素(botulinum toxin type A,BTXA)对早期增生性瘢痕(hypertrophic scar,HTS)的临床预防及治疗效果.方法 早期HTS周围及组织内注射BTXA,观察瘢痕注射药物后形态学变化、组织学变化及临床症状表现;手术切口缝合后即刻向周围肌肉浅层注射BTXA,观察远期瘢痕愈合情况.结果 局部注射BTXA可以明显减轻早期HTS疼痛和瘙痒症状,促使瘢痕组织萎缩、软化;组织切片HE染色显示HTS组织内结构有所变化.同时,手术切口周围肌肉浅层注射BTXA可以降低术后切口HTS的发生、发展概率.结论 BTXA对早期HTS具有一定程度的治疗和预防作用,其疗效可能是通过降低瘢痕两侧张力及活动,干扰瘢痕内小神经传导,以及影响成纤维细胞增殖分化,促进凋亡进而减少胶原合成而起作用.     

增生性瘢痕形成和成熟过程中TGF-β1、TGF-β3及其受体的基因表达变化

TGF β1 是一种多功能的细胞因子,与皮肤创面愈合后形成增生性瘢痕密切相关,而TGF β3的生物功能相反,使用该生长因子能够抑制瘢痕的发生[1 ] 。TGF β1 和TGF β3都能够与细胞膜上Ⅱ 型受体(transforminggrowthfactor betareceptorⅡ,TBRⅡ)结合后,磷酸化Ⅰ型受体(TBRⅠ)上的丝氨酸 苏氨酸,将胞外信号传递到细胞内,引起细胞核内特异性的基因表达[2 ] 。目前,关于不同发生阶段的增生性瘢痕中TGF β1 ,TGF β3,TBR Ⅰ和TBR Ⅱ基因表达变化特征的研究还少有报道,对这一规律的揭示,有利于深入了解调控增生性瘢痕发生和成熟的分子机…     

曲安奈德联合A型肉毒毒素治疗烧伤增生性瘢痕的临床效果

研究曲安奈德联合A型肉毒毒素治疗烧伤增生性瘢痕患者的效果。方法 选取2019年1月-2021年1月贵州省人民医院收治的烧伤增生性瘢痕患者100例为研究对象,按照随机数字表法分为对照组和观察组,各50例。对照组采取曲安奈德注射治疗,观察组采取A型肉毒毒素联合曲安奈德注射治疗,比较两组TGF-β1和BMP-7含量、瘢痕情况、疼痛程度、生活质量及不良反应发生情况。结果 观察组治疗后瘢痕组织中TGF-β1含量低于对照组,BMP-7含量高于对照组（P ＜0.05）;观察组治疗后VSS和VAS评分均低于对照组,SF-36评分高于对照组（P＜0.05）;观察组不良反应发生率为8.00%,低于对照组的38.00%（P＜0.05）。结论 针对烧伤后增生性瘢痕患者,曲安奈德与A型肉毒毒素联合治疗的疗效确切,可改善瘢痕程度及疼痛程度,降低不良反应发生率,提升生活质量。