CN111378125B - Pebp嵌段聚合物凝胶及其制备和应用 - Google Patents
Pebp嵌段聚合物凝胶及其制备和应用 Download PDFInfo
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- CN111378125B CN111378125B CN202010347583.0A CN202010347583A CN111378125B CN 111378125 B CN111378125 B CN 111378125B CN 202010347583 A CN202010347583 A CN 202010347583A CN 111378125 B CN111378125 B CN 111378125B
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Abstract
本发明涉及一种聚乙二醇‑b‑聚L‑苯丙氨酸嵌段(PEBP)嵌段聚合物凝胶及其在制备治疗细胞纤维化引起的病症的药物中的用途,本发明还涉及该嵌段聚合物凝胶的组成成份,以及制备方法,以该嵌段聚合物为活性成分的药物凝胶在预防术后腹腔及宫腔纤维化的发生,以及纤维化导致的粘连病症的用途。
Description
技术领域
本发明涉及一种poly(ethyleneglycol)-b-poly(L-phenylalanine)(PEBP)嵌段聚合物凝胶及其制备,以及其对治疗细胞纤维化引起的粘连的作用,尤其是对术后腹腔及宫腔纤维化引起的腹腔、宫腔粘连的预防作用。
背景技术
成纤维细胞是机体损伤的主要修复细胞,而其大量增殖与凋亡抑制又是瘢痕组织形成的生物学基础之一。基于目前对瘢痕组织形成的认知,成纤维细胞由于自身的改变,被激活于某一分化状态,不受生长因子调控而成为癌细胞生长模式是瘢痕形成的主要原因。此外,成纤维细胞大量增殖分泌大量生长因子及胶原蛋白、纤维蛋白等,最终导致胶原沉积从而组织粘连,如长期腹膜透析病人腹壁纤维化及术后腹腔及宫腔粘连等。当腹膜愈合不好时,成纤维细胞发出细胞外基质通过细胞生长因子和细胞活素沉积的信号,粘连成纤维细胞发展为肌成纤维细胞表型;成纤维细胞和肌成纤维细胞分泌大量细胞外基质分子,然后在组织之间建立一个弱纤维的桥梁。最后,血管和胶原沉积在这座桥上,组织发生了粘连。宫腔粘连被定义为子宫内粘连或纤维化,是由于妊娠或非妊娠子宫的创伤,临床上最常见于不全流产、分娩后刮宫导致子宫内膜基底层受损,使宫腔部分或全部闭塞从而导致月经异常、不孕或反复流产等,这些并发症严重危害着女性的健康。因此,抑制成纤维细胞的增殖是控制由成纤维细胞过度增殖引起术后腹腔粘连及宫腔粘连等的重要手段。
目前宫腔粘连的治疗方法主要为开腹手术和宫腔镜进行粘连松解,但是其复发率都很高;宫内节育器、子宫球囊支架、羊膜等在预防宫腔粘连方面有一定的效果,但效果均不显著。术后腹腔粘连的防治多为应用一些抗胶原沉积、抗炎及促胶原降解的药物,此外对于术后腹腔粘连来说,机械隔离法也是常用预防手段,但是这些方法也不能完全解决腹壁纤维化及术后粘连问题。
目前常用的防粘连屏障材料有液体类、凝胶类以及膜类。液体类比如:1)透明质酸钠-及其缓冲盐,它为透明质酸钠与磷酸缓冲盐结合的高分子溶液,优势在于可有效减少浆膜损伤、炎症,降低术后粘连,但是它也有明显的不足---流动性强,有向低处流动的特点,易受到体位的影响。2)羧甲基壳聚糖为壳聚糖的水溶性衍生物,优势在于可减轻局部炎症反应,降低手术部位的纤维化反应,减少粘连,但不足之处在于它易被体液稀释,导致抗粘连失效。3)4%的葡聚糖溶液。FDA认证的放粘连产品,临床运用广泛,但是在手术部位会引起液体渗漏,且腹腔会有膨胀等不适感。
凝胶类:1)透明质酸钠,分子酸性黏多糖,可在黏膜便面形成一层无反应性且易吸收的生物屏障,优点良好的流动性相容性,粘附性,但是流动性过大,由于易被机体吸收导致隔离时间较短;2)透明质酸羧甲基纤维素,为透明质酸羧甲基纤维素结合的胶状高分子放粘连材料,不溶血,物致突变性,可降解,是一种组织相容性良好的体内植入生物材料,但是在接触损伤后凝胶化不易后期调整,尤其在腹腔镜手术中使用受限;3)壳聚糖凝胶,砜基修饰葡萄糖衍生物和羟基化壳聚糖之间迈克尔加成反应后形成的交联水凝胶,美国FDA认证材料,广泛用于临床,但是也有大量并发症的报道;4)光交联明胶水凝胶,将活性的甲基丙烯基团引入天然聚合物,从而合成的改良天然材料交联剂,其可长达1个月的有效隔离,但是容易涂抹不均匀导致隔离效果变差,并缺乏系统研究验证。
膜类:1)壳聚糖防粘连膜,良好的生物相容性和细胞抗粘附作用,机械性不强,降解可控性不足;2)聚乳酸防粘连膜,聚乳酸高分子材料,需要根据创面剪裁并需要缝线固定,对于深层病灶使用不便,难于应用于微创手术;3)氧化再生纤维素,NO处理的可吸收人造纤维补片,8小时后在创面形成凝胶状物,并在2周内彻底吸收,但是在遇血时效能下降,操作中要仔细止血,也不适用于腹腔镜手术;4)静电纺丝膜,可有效预防大鼠术后腹腔粘连,且生物降解性良好,但是研究报道数量较少。
L-苯丙氨酸(L-Phenylalanine,L-Phe)是人体必需氨基酸之一,属于芳香族氨基酸。近几年,有研究者发现L-苯丙氨酸可以特异性地抑制大鼠心肌成纤维细胞和血管平滑肌细胞的增殖。现有技术以L-苯丙氨酸为模板氨基酸进行合成目标共聚物PDPA(p-dioxanone-co-L-phenylalanine),作为微生物培养面时能有效抑制成纤维细胞增殖。然而PDPA由于受限于其分子量,所制成的膜的力学强度很差,在实际应用中仍难以操作,同时其亲水性不佳,更进一步限制了其在细胞纤维化引起的病症的药物中的用途,如抗粘连材料等。因此,目前临床仍需亲水性好、易于操作、更能有效抑制成纤维细胞增殖的药物来为成纤维细胞参与的术后宫腔及腹腔粘连进行防治。
发明内容
有鉴于现有技术的上述缺陷,本发明致力于开发一种亲水性好、易于操作、能局部有效隔离,并缓慢释放抗粘连有效成分的抗粘连凝胶材料;具体地,致力于开发一种方便涂抹并易被机体吸收的嵌段聚合物抗粘连凝胶材料。
为了实现上述目的,本发明将L-苯丙氨酸片段结合在聚合物分子链上制备成大分子前药,再利用聚合物的可加工性将其制备成凝胶形态,通过前药降解导致的有效成分L-苯丙氨酸在作用部位的释放,使得大分子前药凝胶在物理阻隔的基础上实现对成纤维细胞的生长调控,从而产生较优异的纤维化预防效果。
一方面,本发明提供了一种聚乙二醇-b-聚L-苯丙氨酸poly(ethyleneglycol)-b-poly(L-phenylalanine)(PEBP聚乙二醇-b-聚L-苯丙氨酸)嵌段聚合物,其结构如分子式(I)所示。
本发明的聚乙二醇-b-聚L-苯丙氨酸poly(ethyleneglycol)-b-poly(L-phenylalanine)(PEBP聚乙二醇b-聚L-苯丙氨酸)嵌段聚合物可通过以下合成路线进行制备。以L-苯丙氨酸(L-Phe)为原料,与三氯甲基碳酸酯进行合成制备得到(L-苯丙氨酸-N-羧酸酐(L-Phe NCA)),再与氨基封端的聚乙二醇(methoxy-polyethylene glycol-amino,mPEG-NH2)大分子引发剂引发L-Phe NCA开环聚合得到PEBP。
本发明所述嵌段共聚物PEBP的分子量7-17kDa,其中,L-苯丙氨酸在聚合物中含量越高,分子量越大,L-苯丙氨酸-N-羧酸酐与PEG重量比为4/1时,其分子量为16718.84,而L-苯丙氨酸-N-羧酸酐与PEG重量比为1/1时,其分子量为7451.96。
另一方面,本发明提供了一种PEBP嵌段聚合物凝胶及其制备方法。本发明以聚乙二醇PEG为辅料将PEBP制备成凝胶,其制备方法为在含四氢呋喃的PEBP嵌段聚合物中加入PEG400和水,搅拌均匀后,除去四氢呋喃。采用试管倒置法检验凝胶是否形成。
其中,所述的PEBP嵌段聚合物分子量为7-17kDa,所述PEBP嵌段聚合物的含量为2-5%。
PEG是美国食品药品监督局(FDA)批准的具有良好水溶性和生物相容性的生物医用高分子材料。它的加入使所得的PEBP嵌段聚合物具有两亲性,黏附性好,无毒等特点,并且聚合物水解后即得到L-Phe。本发明人将PEBP制备成凝胶用于预防术后腹腔及宫腔纤维化。所得到的PEBP嵌段聚合物凝胶具有两亲性、黏附性好、无毒性等特性,聚合物肽键水解即可得到L-Phe。因此PEBP凝胶不仅可以起到物理阻隔的作用,还具有一定的药效,对于预防术后腹腔及宫腔纤维化粘连起到双重作用。在使用PEBP凝胶后,术后腹腔或宫腔的轻度粘连发生率仅为25%。
本发明人发现本发明的分子式(I)的共聚物凝胶对防止细胞纤维化而引起的粘连有预防作用,尤其是对于腹腔宫腔术后粘连有较好的预防作用。具体地,将PEBP凝胶涂抹在创面后,伴随着聚合物凝胶的逐渐降解,L-Phe被释放到创面组织附近,L-Phe对细胞膜表面钙离子敏感受体的调控,可抑制成纤维细胞的增殖。且实验证明其抑制成纤维细胞增殖的作用优于单独应用L-Phe。
本发明还提供一种包括分子式(I)的嵌段共聚物凝胶PEBP在制备治疗由细胞纤维化引起的病症的药物中的用途,尤其是由细胞纤维化引起的粘连的药物中的用途;如治疗术后宫腔或腹腔组织粘连、或反复刺激导致腹壁纤维化的药物中的用途。实验证明,本发明的嵌段共聚物凝胶可有效抑制成纤维细胞的增殖,预防粘连如术后腹腔以宫腔粘连。
本发明人还发现分子式(I)化合物的毒性很低。
本发明还提供了一种药物组合物以及该药物组合物在制备治疗细胞纤维化引起的病症的药物中的用途;其中,所述药物组合物含有治疗有效量的上述分子式(I)化合物为活性成分,以及含有一种或多种药学上可接受的载体。
本发明的分子式(I)化合物和所述药物组合物可用于治疗细胞纤维化引起的病症,如用于治疗术后宫腔、腹腔组织粘连发生的药物。
上述所述药学上可接受的载体是指药学领域常规的药物载体,例如:稀释剂、赋形剂如水等,填充剂如淀粉、蔗糖等;粘合剂如纤维素衍生物、藻酸盐、明胶和聚乙烯吡咯烷酮;湿润剂如甘油;吸收促进剂如季铵化合物;表面活性剂如十六烷醇;吸附载体如高岭土;润滑剂如滑石粉、硬脂酸钙和镁和乙二醇。另外还可以在组合物中加入其它辅剂如甜味剂等。
本发明化合物用于抑制瘢痕增生或抑制反复刺激导致的腹壁纤维化用途时,可以组合物的形式通过局部注射或局部植入的给药方式施用于需要治疗的患者。用于局部注射时可制备成液体制剂如水悬浮剂或其它液体制剂。用于局部植入时可制成常规制剂如片剂、粉剂、粒剂等。用于防止术后组织粘连的用途时以生物膜的形式植入手术部位。
本发明药物组合物的各种剂型可以按照药学领域的常规生产方法制备。例如使活性成分与一种或多种载体组合,然后将其制成所需的剂型。本发明药物组合物优选含有重量比为0.1%-99.5%的活性成分,最优选含有重量比为0.5-95%的活性成分。
本发明化合物的施用量可根据用药途径、患者的年龄、体重、疾病类型和程度等变化,其日剂量可以是0.01-100mg/kg体重,优选0.1-50mg/kg体重,可一次或多次施用。所属领域的技术人员可根据实际情况容易确定给药剂量,如10mg/kg体重。
技术效果
以下将结合附图对本发明的构思、具体结构及产生的技术效果作进一步说明,以充分地了解本发明的目的、特征和效果。
附图说明
图1是本发明的一个较佳实施例中L-Phe及PEBP凝胶透析24小时后透析液HPLC图谱;
图2是本发明的一个较佳实施例中PEBP凝胶透析液中L-Phe浓度随培养时间的变化。
图3不同浓度PEBP、L-Phe与L-929细胞共同培养24小时后对成纤维细胞增殖的抑制作用。
图4不同组别大鼠宫腔搔刮术21天后;a.子宫组织HE染色结果;b.Masson染色结果。
图5.不同组别大鼠宫腔搔刮术21天后(受精14天后)胚胎着床情况。
具体实施方式
下面通过实施例的方式进一步说明本发明,本发明的范围并不因此局限于下述实施例,而是由本发明的说明书和权利要求书限定。实施例中未注明具体条件者,按照常规条件或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者,均为可以通过市售购买获得的常规产品。
实施例中主要试剂,仪器及实验动物
L-苯丙氨酸(L-Phenylalanine,L-Phe)(分析纯,成都艾科达化学试剂有限公司);三氯甲基碳酸酯(分析纯,成都艾科达化学试剂有限公司);四氢呋喃;氨基封端的PEG5000;PEG400(AR.成都科龙化学试剂厂)。核磁共振仪(瑞士Bruker AM400);Agilent-1220型高效液相色谱仪;实验动物雌性SD大鼠8只,体重120-140g,雌性SD大鼠36只,体重220-250g,雄性大鼠9只,体重300g,由川北医学院动物实验中心提供。
实施例1
PEBP聚合物凝胶的制备,结构表征及含量的测定
1)合成L-苯丙氨酸-N-羧酸酐(L-Phe NCA)
将乙酸乙酯在氢化钙存在条件下加热回流48小时,使用前蒸出。将5g L-苯丙氨酸置于250ml三颈瓶中,6.8g三氯甲基碳酸酯置于恒压滴液漏斗中,用真空泵对体系进行减压干燥,然后用N2置换三次后持续通入N2。将三颈瓶置于恒温油浴中,在搅拌下将80ml无水乙酸乙酯注入三颈瓶中,三氯甲基碳酸酯用40ml无水乙酸乙酯溶解,当有溶剂回流时向三颈瓶中缓慢滴入三氯甲基碳酸酯溶液,在搅拌下回流反应3小时,体系澄清标志反应结束,将溶液放冷,10wt%NaHCO3100ml洗涤4次,氯化钙干燥,过滤,加入正己烷直至结晶出现,-20℃保存过夜,滤出结晶真空干燥,得L-苯丙氨酸-N-羧酸酐。1H NMR(400MHz,DMSO-d6,δ,ppm):7.14-7.34(m,5H,ArH),4.79(t,1H,CH),3.03(m,2H,CH2)。
由表1可知不同投料比、溶剂用量所得产物的量不同,L-苯丙氨酸-N-羧酸酐的产率随溶剂用量增加而升高。
表1 L-苯丙氨酸-N-羧酸酐合成结果
实施例2
1)PEBP嵌段聚合物的合成
将计量的氨基封端的mPEG-NH25000和L-Phe NCA置于100ml圆底烧瓶中,用真空泵对体系进行减压干燥,然后用N2置换三次,将30ml无水四氢呋喃(THF)加入圆底烧瓶中,磁力搅拌并加热使PEG溶解,于35℃下搅拌反应96小时,反应结束后用旋转蒸发除去反应体系的四氢呋喃,得PEBP聚合物。1H NMR(400MHz,DMSO-d6,δ,ppm):7.13-7.279(m,5H,ArH),4.583(m,1H,CH of L-Phe structure unit),3.53(t,CH 2CH 2O),2.93(m,CH2of L-Phestructure unit)。
表2 PEBP嵌段聚合物平均链段长度及产率
由表2可知,聚合物的链段长由度-NH2与L-苯丙氨酸-N-羧酸酐的投料比及溶剂种类决定,反应时间长短对产率的影响不大。10号(投料比为2∶8、反应时间为5天)的产率比3号(投料比为2∶8、反应时间为4天)的产率高,但9号(投料比为3∶7时,反应时间为5天)的产率比4号(投料比为3∶7时、反应时间为4天)的产率低,说明产率并不取决于反应时间长短。2号、5号、8号的比例与反应时间均相同,但5号与8号的产率明显高于2号。
2)PEBP聚合物分子量的测定
将1H NMR(400MHz,DMSO-d6,δ,ppm)谱中苯环的峰面积定为5,得到PEG5000的峰面积为a,每条PEG链含有113个结构单元(CH2CH2O),每个结构单元含有4个H,a/4得到每个苯环所对应的PEG5000的结构单元数目b,113/b为每一条PEG链所含聚合的L-Phe NCA数目,(5000+113÷b×147)即为PEBP聚合物的分子量。
公式:M=5000+113×4×147÷a÷b
表3 PEBP平均分子量
由表3可知,不同投料比得到的PEBP的平均分子量不同,L-Phe NCA所占比例越高,所得PEBP聚合物平均分子量越大。
实施例3
1)凝胶的制备
在聚合物中加入6mLPEG400、2ml水,搅拌均匀后旋蒸(不加热)除去大量四氢呋喃得10ml凝胶,将凝胶转入20mL的玻璃瓶中,瓶口敞开,在室温下将瓶口敞开使剩余的四氢呋喃挥发,并加入水置换出四氢呋喃,每次加入水0.5ml,最终加入凝胶中的水为7.5ml。采用试管倒置法检验凝胶是否形成。
2)凝胶中PEBP聚合物含量的测定
取适量m1g凝胶真空干燥得m2g固体,将1H NMR(400MHz,DMSO-d6,δ,ppm)谱中苯环的峰面积定为5,得到PEG5000与PEG400的峰面积和c,(c-a)得PEG400的峰面积d,每条PEG5000链含有113个结构单元(CH2CH2O),每条PEG400链含有9.09个结构单元,每个结构单元含有4个氢,a/4得到每个苯环所对应的PEG5000中结构单元数目b,(c-a)/4得到每个苯环所对应的PEG400中结构单元数目e,b/113得PEBP的物质的量f,e/9.09得PEG400物质的量g,f×(5000+147×113÷b)为PEBP的质量h,g×400为PEG400的质量i,h×m2÷(h+i)÷m1×100%得到凝胶中PEBP聚合物含量。
表4凝胶中PEBP聚合物含量
实施例4
药物体外释放
PEBP凝胶透析24小时后透析液HPLC图谱如图1所示,从图1可知在PEBP凝胶的透析液中明确可见L-Phe单体,即随着培养时间的延长,L-Phe从聚合物分子链脱落,被释放至降解介质中。
PEBP凝胶透析液中L-Phe浓度随培养时间的变化如图2所示,由图2可见L-Phe可被持续释放至降解介质,透析液中L-Phe浓度随着培养时间的延长升高至峰值,之后逐渐降低。
实施例5
不同浓度PEBP凝胶、L-Phe与L-929成纤维细胞共同培养24小时后,成纤维细胞的增殖受到抑制,且PEBP凝胶对成纤维细胞增殖的抑制作用强于单独使用L-Phe。如图3所示,L-Phe对L-929的半抑制浓度(IC50)为0.78mg/ml。PEBP凝胶对L-929的半抑制浓度(IC50)为11.16mg/ml,若PEBP凝胶全部降解将L-Phe释放至介质中,则L-Phe浓度为0.42mg/ml,然而PEBP凝胶并不能在24小时内全部释放,故在PEBP凝胶对L-929细胞的半抑制状态下,L-Phe浓度应远低于0.42mg/ml。可见,PEBP凝胶对L-Phe的缓释作用提高了细胞对L-Phe的利用效率,即PEBP凝胶对成纤维细胞增殖的抑制作用优于L-Phe.
实施例6
1)动物实验分组
大鼠腹腔粘连模型:将8只雌性SD大鼠随机分为两组:对照组(n=4)及实验组(n=4)。
2)大鼠腹腔粘连
120g-140g大鼠禁食禁水12h,对照组:用3%戊巴比妥钠溶液腹腔注射麻醉,麻醉好后将大鼠仰卧固定于手术板上,将其腹部毛剃除,用碘伏消毒皮肤,铺无菌巾,沿腹白线做3cm切口,提出盲肠,置于纱布上约5min,使浆膜干燥,用手术刀片反复轻刮盲肠浆膜,造成约1cm2轻度渗血创面,用1滴生理盐水清洗创面,再用手术刀片反复轻刮腹壁,造成约1cm2轻度渗血创面,然后将盲肠回纳入腹腔原位,用可吸收线将盲肠刮伤的部位与腹壁刮伤部位缝合,然后分2层以3-0号医用缝线关腹,肌肉注射头孢呋辛钠防止感染。实验组:用3%戊巴比妥钠溶液腹腔注射麻醉,麻醉好后将大鼠仰卧固定于手术板上,将其腹部毛剃除,用碘伏消毒皮肤,铺无菌巾,沿腹白线做3cm切口,提出盲肠,置于纱布上约5min,使浆膜干燥,用手术刀片反复轻刮盲肠浆膜,造成约1cm2轻度渗血创面,用1滴生理盐水清洗创面,将适量PEBP凝胶均匀涂抹在创面上,再用手术刀片反复轻刮腹壁,造成约1cm2轻度渗血创面,将适量PEBP凝胶均匀涂抹在创面上(0.5ml/只),然后将盲肠回纳入腹腔原位,用可吸收线将盲肠刮伤的部位与腹壁刮伤部位缝合,然后分2层以4-0号医用缝线关腹,肌肉注射头孢呋辛钠防止感染。手术后第七天开腹观察实验组和对照组腹腔粘连情况。
3)动物实验结果
从表5可知PEBP的应用成功防止了大鼠术后腹腔粘连的发生。
表5粘连情况
实验组四只大鼠中三只无粘连,一只有轻度粘连。对照组四只大鼠均粘连此实验结果说明PEBP聚合物凝胶可以有效预防术后腹腔粘连,PEBP凝胶可用于预防腹腔术后腹腔粘连的发生。
实施例7
1)动物实验分组
大鼠宫腔纤维化模型:36只雌性大鼠随机分为三组:假手术组(n=12),透明质酸钠溶液组(n=12)及PEBP凝胶组(n=12)。
2)大鼠宫腔纤维化
雌性大鼠麻醉后,严格无菌操作,切开大鼠下腹部,暴露大鼠子宫,于宫颈上方约5mm处作纵行切口,长度约4mm,采用自制大鼠宫腔刮勺经宫颈上方切口对大鼠行刮宫术,待宫腔四壁出现粗糙感时停止刮宫,PEBP凝胶组大鼠一侧宫腔注入PEBP凝胶,另一侧不做处理作为模型组,透明质酸钠组大鼠一侧宫腔注入透明质酸钠另一侧不做处理作为模型组,6-0可吸收线缝合切口。将制作好的脂多糖棉线置入已行刮宫术的宫腔,在腹壁留一定长度的尾丝以便下一步取出棉线。生理盐水冲洗腹腔,缝合大鼠腹壁。24h后取出脂多糖棉线,7d后即可形成稳定的大鼠宫腔纤维化模型。假手术组仅开腹暴露15分钟后关腹。术后7天每组大鼠随机选取6只与雄鼠交配(2雌鼠配1雄鼠),交配两周后检查各组子宫着床胚胎数目。每组所剩6只雌鼠直接处死,取子宫组织固定,包埋,切片做HE染色及Masson染色。
脂多糖棉线制作:10号医用无菌手术线浸泡于6mg/L的脂多糖生理盐水中,4℃放置24h备用。
3)动物实验结果
从图4及图5可知PEBP的应用成功防止了大鼠术后宫腔粘连的发生。
图4a的染色结果可看出,PEBP凝胶的植入未引发炎症及异物反应,凝胶组织相容性较好,图4b的染色结果可看出与假手术组相比,搔刮术导致模型组大鼠子宫严重纤维化(蓝染组织),透明质酸钠的应用不能缓解纤维化的发生,而PEBP凝胶的使用显著地降低了大鼠子宫组织的纤维化程度。从图5可知搔刮术严重影响大鼠子宫胚胎着床率,模型组大鼠子宫着床胚胎数目显著低于假手术组,透明质酸钠的应用不能改善这一状况,而与模型组相比PEBP凝胶的应用提高了胚胎着床的成功率,着床胚胎数目显著增加。
本发明的PEBP凝胶抑制成纤维细胞的增殖是控制由成纤维细胞过度增殖,其抑制成纤维细胞增殖的效果优于L-Phe。与也具有一定抑制细胞增生效果的PDPA相比,细胞实验结果显示PEBP凝胶具有更好的腹腔粘连预防作用,使用PDPA膜后,轻度粘连发生率为37.5%,无粘连的大鼠占全部实验大鼠的62.5%;而使用PEBP凝胶后,轻度粘连发生率为25%,无粘连的大鼠占全部实验大鼠的75%。因此PEBP凝胶的效果较于PDPA更佳。而在实际操作时,PEBP比PDPA膜的操作更容易、简单。
综上,PEBP凝胶无显著异物反应,在宫腔搔刮术后注入该凝胶可有效缓解搔刮引起的宫腔组织纤维化程度。宫腔纤维化导致子宫弹性下降不利于胚胎成功着床,PEBP凝胶的抗纤维化作用可显著提升搔刮术后子宫胚胎着床成功率。因此,PEBP凝胶可用于预防宫腔搔刮术后子宫组织的纤维化。
Claims (6)
2.一种如权利要求1所述的水溶性抗粘连凝胶在制备治疗细胞纤维化引起的病症的药物中的用途。
3.如权利要求1所述的水溶性抗粘连凝胶在制备治疗细胞纤维化引起的粘连的药物中的用途。
4.如权利要求1所述的水溶性抗粘连凝胶在制备治疗反复刺激导致腹壁纤维化的药物中的用途。
5.如权利要求1所述的水溶性抗粘连凝胶在制备治疗反复刺激导致子宫壁纤维化的药物中的用途。
6.如权利要求1所述的水溶性抗粘连凝胶在制备治疗细胞纤维化引起的术后宫腔或腹腔组织粘连发生的材料中的用途。
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