CN118217291A - 维生素在制备激活原始卵泡的药物中的应用 - Google Patents
维生素在制备激活原始卵泡的药物中的应用 Download PDFInfo
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Abstract
本发明提供了维生素在制备激活原始卵泡的药物中的应用,属于生物技术领域。本发明发现维生素促进原始卵泡激活,可作为治疗早发性卵巢功能不全患者的口服药物,具有良好的应用前景。
Description
技术领域
本发明属于生物技术领域,具体涉及维生素在制备激活原始卵泡的药物中的应用。
背景技术
卵泡是卵巢结构和功能的基本单位,根据卵泡生长发育的不同阶段,可分为原始卵泡、初级卵泡、次级卵泡、有腔卵泡和成熟卵泡。原始卵泡其数量有限且不可再生,因此其数量被认为代表了女性生育力,直接决定着女性生殖寿命的长短。遗传因素、环境污染、抗癌药物等很容易导致原始卵泡的过度激活或者凋亡,最终引起早发性卵巢功能不全(POI)。这类POI患者卵巢内往往还存有少量深度休眠的原始卵泡,但是很难在生理情况下被激活,导致不育。此外高龄女性也存在原始卵泡数量少而出现生育力下降。这些女性不能利用传统的辅助生殖技术进行治疗。目前采用的方法主要是通过体外激活(IVA)的方式,再自体移植。该方法受到很多限制、需要进行手术、容易产生DNA损伤和癌变风险等,且成功率低。目前还没有通过口服药物促进原始卵泡激活而恢复POI患者生育力的治疗方案。开展对人原始卵泡维持与激活的起始调节因子研究,阐明原始卵泡激活及卵泡发育的分子机制,对于这些患者的诊断和治疗至关重要。
雌性哺乳动物出生前后合胞体破裂形成原始卵泡,并构成原始卵泡库,在每一次周期性募集中大部分的原始卵泡都保持着休眠状态,只有少数的原始卵泡被激活进入生长状态,最终发育成熟和排卵。研究最多原始卵泡激活的分子和信号机制是前颗粒细胞中雷帕霉素激酶(mTOR)促进KIT配体(KITL)的产生。KITL与其受体KIT原癌基因受体酪氨酸激酶(c-KIT)结合,激活卵母细胞中磷脂酰肌醇3-激酶(PI3K)-蛋白激酶B(Akt)信号通路。
维生素主要包括A族维生素(VA)、B族维生素(VB)、C族维生素(VC)、D族维生素(VD)、E族维生素(VE)和K族维生素(VK)。VA可以调控细胞增殖、分化,对生殖组织和哺乳动物的胚胎发生有及其重要的作用。VB中VB1又称硫胺素,具有维持正常糖代谢的作用。VB2又称核黄素,可以促进发育和细胞再生。VB3又称烟酸,在我们的身体组织中转化为主要的代谢活性形式:辅酶烟酰胺腺嘌呤二核苷酸(NAD)和辅酶烟酰胺腺嘌呤二核苷酸磷酸(NADP)。NAD还参与能量代谢并在细胞功能中起着关键作用,如控制基因的表达。NADP能够促进合成代谢反应,如胆固醇和脂肪酸的合成,并在维持细胞抗氧化功能方面发挥着重要作用。VB4又称腺嘌呤,是核酸和辅酶的组成成分,参与体内DNA和RNA的合成,为维持生物体代谢的必要成分。VB5又称泛酸,在体内转变成辅酶A或酰基载体蛋白,参与糖、脂肪、蛋白质和能量代谢。VB6又称吡哆素,为体内某些辅酶的组成成分,参与多种代谢反应,尤其是与氨基酸代谢有密切关系,临床上可用于防治妊娠呕吐和放射病呕吐。VB7又称生物素,是脂肪和蛋白质正常代谢不可或缺的物质,是维持人体自然生长、发育和正常人体机能健康必要的营养素。VB9又称叶酸,参与遗传物质和蛋白质的代谢;影响动物繁殖性能;影响动物胰腺的分泌;促进动物的生长;提高机体免疫力。VB12又称钴胺素,具有活化氨基酸的作用和促进核酸的生物合成,可促进蛋白质的合成,它对婴幼儿的生长发育有重要作用。VC能延缓细胞的衰老和凋亡,可对部分组织的修复其促进作用。VD主要作用是调节钙、磷代谢,促进肠内钙磷吸收和骨质钙化,维持血钙和血磷的平衡。VE可以维持机体正常的生殖机能,延缓机体衰老。VK主要促进凝血,也可参与骨骼代谢。
发明内容
为了克服现有技术中存在的缺点与不足,本发明的首要目的在于提供维生素在制备激活原始卵泡的药物中的应用。
本发明的目的通过如下技术方案实现:
维生素在制备治疗早发性卵巢功能不全的药物中的应用,所述的维生素为如下一种或多种组合:VB1、VB2、VB3、VB4、VB5、VB6、VB9、VB12、VC、VE。
进一步地,所述的应用为维生素在制备激活原始卵泡的药物中的应用。
更进一步地,所述的激活原始卵泡的药物为促进原始卵泡向生长卵泡转化的药物。
进一步地,在所述的应用中,所述的维生素的剂量按个体体重计算,每50kg体重施用维生素质量如下所示:
进一步地,所述的原始卵泡为小鼠或人的原始卵泡。
进一步地,所述的药物的给药方式为口服或静脉注射给药。
一种(非疾病诊疗目的)原始卵泡的体外激活方法,取卵巢于维生素溶液中培养;所述的维生素为如下一种或多种组合:VB1、VB2、VB3、VB4、VB5、VB6、VB9、VB12、VC、VE。
进一步地,所述的维生素溶液中维生素的浓度分别如下所示:
进一步地,所述的卵巢为小鼠或人卵巢。
进一步地,所述的小鼠为新生小鼠。
进一步地,所述的培养为37±2℃、5%±1%CO2恒温培养4天。
与现有技术相比,本发明具有如下优点及有益效果:
POI是临床上比较严重的卵巢疾病,该病呈现年轻化的趋势,发病率不断提高,严重影响女性生育能力和身体健康。只有当雌性哺乳动物(包括人)的原始卵泡受到精密调控且被有序激活,才可能维持雌性(女性)的正常生殖寿命。在本发明中我们发现维生素具有促进小鼠卵巢原始卵泡激活的作用,在药物处理作用下,处理组小鼠的生长卵泡数量显著上升。这些药物可以用于口服和静脉注射,所以基于本发明,可以通过口服激活原始卵泡,治疗POI患者,对挽救其生育能力具有良好的应用前景。
附图说明
图1为3dpp新生小鼠卵巢添加不同维生素培养4天的形态图;
图2为卵泡计数结果图,其中,(A)生长卵泡统计计数;(B)原始卵泡统计计数;
(C)总卵泡统计计数;标尺:50μm。
具体实施方式
下面结合实施例及附图对本发明作进一步详细的描述,但本发明的实施方式不限于此。
下列实施例中未注明具体实验条件的试验方法,通常按照常规实验条件或按照制造厂所建议的实验条件。所使用的材料、试剂等,如无特殊说明,为从商业途径得到的试剂和材料。
实施例1
1.1体外培养相关试剂配置
1.1.1DMEM/F12培养基(250ml)配置,如表1所示:
表1DMEM-F12培养基
注:SP为买的商品化的青霉素和链霉素的双抗,添加到培养基用量为每100μL添加100mL培养基中。定容至250mL之后用0.22μm滤器过滤,在超净台中操作,用封口膜封口并在4℃保存。
1.1.2磷酸盐缓冲溶液(Phosphate buffered solution,PBS,1L,pH:7.2)配制,如表2所示:
表2PBS缓冲液
用去离子水定容至1L,高压灭菌,4℃保存。
1.1.3各实验组培养基药物浓度配置:VB3、VB4、VB5、VB6、VC用超纯水溶解配制浓储液;VB1、VB2、VB9、VB12、VE用二甲基亚砜(DMSO)溶解配制浓储液。各种药物的最终使用浓度见表3。
表3各实验组培养基中药物浓度
1.2实验方法
1.2.1小鼠卵巢的分离
1)所有的手术器械,玻璃平皿等都进行灭菌处理,细胞间打开紫外灯照射半个小时灭菌。
2)本实验以3天大ICR雌鼠作为材料,用颈椎脱臼的方法处死小鼠解剖,将小鼠的头腹部和带有双侧肾的尾部分离,并把尾部放到冷的PBS里。
3)在体视显微镜操作,把小鼠卵巢和卵巢膜一起取出,并用注射针把卵巢周围包裹的膜分离。
1.2.2小鼠卵巢的体外培养
1)在六孔板每个孔中加入3mL DMEM/F12培养基,再加入提前配置好的药物溶液,对照组加入DMSO,吹打混匀,每个孔上放入0.44μm培养膜,放在二氧化碳培养箱37℃孵育30分钟。
2)将分离好的卵巢放到培养膜上,置于37℃恒温二氧化碳培养箱中培养;
3)每两天换一次培养基,共培养4天。
1.2.3卵巢包埋、切片与苏木精染色
1)样品的固定:小鼠卵巢在4%的多聚甲醛中4℃固定12-16小时;
2)酒精浓度梯度脱水和透明:70%酒精,80%酒精,95%酒精/伊红染液,95%酒精,无水酒精,无水乙醇/二甲苯(体积1:1),二甲苯,每个梯度5分钟,最后的二甲苯用滤纸吸干。
3)浸蜡和包埋:将卵巢在隔绝水(封口膜)的60℃环境中浸蜡2小时后转移到石蜡盒中。
4)组织切片:切片一般厚度为5μm。
5)展片:蜡带在42℃水浴锅充分的伸展后用载玻片捞起.
6)烤片:42℃过夜。
1.2.5苏木精染色
1)脱蜡复水:将切好的片子依次经过二甲苯,二甲苯,无水酒精,无水酒精,95%酒精,80%酒精,70%酒精。每个梯度各5分钟,最后用去离子水冲洗。
2)染色:用苏木精染料染1分钟左右,用水冲洗。
3)脱水封片:依次经过70%酒精,80%酒精,95%酒精,无水酒精,无水酒精,二甲苯,二甲苯,每个梯度各3分钟,最后用中性树脂封片。
1.3卵巢卵泡计数
对染色的连续切片进行计数,每连续5张切片取一张进行计数,最终的统计结果是将计数结果相加后乘以5。根据卵泡的形态学特点可以区分为:原始卵泡:周围三到五个扁平的颗粒细胞和中间的一个卵母细胞;激活卵泡:周围一层立方状的颗粒细胞或者周围立方状的和扁平状混合的一层颗粒细胞和中间一个长大的卵母细胞。
1.4卵巢卵泡计数结果
结果如图1、图2所示,其中:
图1:对照组和添加药物组之间的形态学比较,箭头指向为激活的生长卵泡;标尺:50μm;
图2:(A)生长卵泡统计计数:与对照组相比,1μMVB1、10μMVB2、1μMVB3、1μMVB4、20μMVB5、10μMVB6、40μMVB9、10μMVB12、250μMVC、1μMVE可以显著促进原始卵泡的激活(P<0.05);(B)原始卵泡统计计数;(C)总卵泡统计计数,实验组与对照组之间没有明显差异。
本发明对3dpp新生小鼠卵巢添加维生素或不添加药物培养4天,观察其卵巢结构。连续切片统计分析表明,与对照组相比(423.33±15.28,数据表示每个卵巢中的原始卵泡激活数量),1μMVB1(521.67±30.14)、10μMVB2(651.67±32.15)、1μMVB3(628.33±29.30)、1μMVB4(631.67±36.86)20μM VB5(670±36.05)、10μMVB6(718.33±32.53)、40μMVB9(683.33±60.07)、10μMVB12(566.67±25.66)、250μMVC(653.33±30.14)、1μMVE(745±40)可以显著促进原始卵泡的激活。
此外,因维生素的作用,生长卵泡的增多导致原始卵泡数目稍微下降,但小鼠卵巢总卵泡数没有影响,说明维生素对原始卵泡和生长卵泡凋亡不产生影响。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。
Claims (10)
1.维生素在制备治疗早发性卵巢功能不全的药物中的应用,其特征在于:所述维生素任意一种或多种化合物组合:VB1、VB2、VB3、VB4、VB5、VB6、VB9、VB12、VC、VE。
2.根据权利要求1所述的应用,其特征在于:
所述的应用为维生素在制备激活原始卵泡的药物中的应用。
3.根据权利要求1所述的应用,其特征在于:
所述的激活原始卵泡的药物为促进原始卵泡向生长卵泡转化的药物。
4.根据权利要求1-3任一项所述的应用,其特征在于:
在所述的应用中,所述的维生素的剂量按个体体重计算,每50kg体重施用维生素的质量如下所示:
5.根据权利要求1-3任一项所述的应用,其特征在于:
所述的原始卵泡为小鼠或人的原始卵泡;
所述的药物的给药方式为口服或静脉注射给药。
6.一种原始卵泡的体外激活方法,其特征在于:取卵巢于维生素溶液中培养;所述维生素任意一种或多种化合物组合:VB1、VB2、VB3、VB4、VB5、VB6、VB9、VB12、VC、VE。
7.根据权利要求6所述的原始卵泡的体外激活方法,其特征在于:
所述的维生素溶液中维生素的浓度分别如下所示:
8.根据权利要求6或7所述的原始卵泡的体外激活方法,其特征在于:
所述的卵巢为小鼠或人卵巢。
9.根据权利要求8所述的原始卵泡的体外激活方法,其特征在于:
所述的小鼠为新生小鼠。
10.根据权利要求6或7所述的原始卵泡的体外激活方法,其特征在于:
所述的培养为37±2℃、5%±1%CO2恒温培养4天。
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