实验动物与比较医学 ›› 2026, Vol. 46 ›› Issue (5): 677-688.DOI: 10.12300/j.issn.1674-5817.2026.094

• 人类疾病动物模型 • 上一篇    下一篇

环磷酰胺/紫杉醇诱导化疗脱发模型小鼠的性别间差异对比分析

钟秋明1, 钱丽萍2, 蔡媛媛2, 刘德强1, 林玮1, 俞春英1, 谢金东1, 王训立1, 吴胜2, 陈碧茵3, 黄镇1()()   

  1. 1. 福建中医药大学科技创新与转化中心, 福州 350122
    2. 福建省医学科学研究院, 福州 350001
    3. 福建中医药大学附属第三人民医院, 福州 350122
  • 收稿日期:2026-05-19 修回日期:2026-09-07 出版日期:2026-10-25 发布日期:2026-10-16
  • 通讯作者: 黄镇(1987—),男,博士,教授,研究方向:实验动物资源开发与利用。E-mail: zhuang@fjtcm.edu.cn。ORCID:0000-0002-8908-0355
  • 作者简介:
    钟秋明(1995—),女,硕士,助理实验师,研究方向:实验动物学。E-mail: zhongq@fjtcm.edu.cn
  • 基金资助:
    福建省第四批“雏鹰计划”青年拔尖人才项目; 福建中医药大学青年科技创新人才培育计划项目(XQC2024003)

Comparative Analysis of Sex Differences Between Cyclophosphamide- and Paclitaxel-Induced Mouse Models of Chemotherapy-Induced Alopecia

ZHONG Qiuming1, QIAN Liping2, CAI Yuanyuan2, LIU Deqiang1, LIN Wei1, YU Chunying1, XIE Jindong1, WANG Xunli1, WU Sheng2, CHEN Biyin3, HUANG Zhen1()()   

  1. 1. Innovation and Transformation Center, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
    2. Fujian Academy of Medical Sciences, Fuzhou 350001, China
    3. The Third People's Hospital Affiliated to Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China
  • Received:2026-05-19 Revised:2026-09-07 Published:2026-10-25 Online:2026-10-16
  • Correspondence to:
    HUANG Zhen (ORCID: 0000-0002-8908-0355), E-mail:

摘要:

目的 评价性别因素对环磷酰胺(cyclophosphamide,CYP)和紫杉醇(paclitaxel,PTX)诱导性脱发(chemotherapy-induced alopecia,CIA)小鼠模型表型稳定性的影响,并推测雌性小鼠表型异质性的可能机制。 方法 选取28只6~8周龄野生型SPF级C57BL/6J小鼠(雌雄各半),进行背部同步脱毛;脱毛后第9天,将小鼠随机分为野生型雌性CYP组、野生型雄性CYP组、雌性阴性对照组和雄性阴性对照组;其中,CYP组单次腹腔注射120 mg/kg CYP,阴性对照组腹腔注射等体积生理盐水,随后连续观察并拍照记录CYP所致CIA模型的表型变化。选取11只6周龄SPF级雌性C57BL/6J小鼠进行双侧卵巢切除(OVX组),与5只四核心基因型种鼠繁育所得XY(Sry⁻)小鼠按相同方法构建CIA模型。对OVX组、野生型雌性和雄性CYP组的小鼠于给药后第7天采集血清进行甾体激素质谱检测,以评价性腺源雌激素和性染色体背景改变对CYP诱导雌性脱发表型稳定性的影响。取20只6~8周龄SPF级C57BL/6J小鼠(雌雄各半),随机分为PTX低剂量组和PTX高剂量组,分别在同步脱毛后第9天,单次腹腔注射80 mg/kg或120 mg/kg的PTX,进行连续观察拍照,以比较雌性、雄性小鼠表型的组内一致性;再选取6只6~8周龄SPF级C57BL/6J小鼠(雌雄各半)重复PTX低剂量组的构建方法,分别于给药后当日和给药后第4、7、14、21天进行毛囊组织学检测,以观察PTX对毛囊再生的损伤。 结果 CYP诱导的雄性CIA模型小鼠的表型稳定性和可重复性较高;而CYP诱导的雌性CIA模型小鼠在脱发表型上存在明显个体差异,处于动情周期的相关雌激素的组间差异可能是引发该现象的主要原因。OVX+CYP组和XY(Sry⁻)+CYP组小鼠的组间差异消失,提示卵巢来源激素及XY(Sry⁻)性染色体背景可能共同参与了雌性小鼠CYP诱导脱发表型异质性的形成。高剂量PTX组和低剂量PTX组小鼠表现出较为一致的脱发-再生过程,未见明显性别差异。 结论 CYP诱导CIA模型受性别因素影响明显,卵巢切除和性染色体背景改变可提高CYP诱导雌性小鼠模型脱发表型的一致性。PTX诱导的CIA模型在雌性、雄性小鼠中均具有较好的表型一致性和性别适用性。综上,在CIA动物模型的构建、机制研究及防脱发药物评价中,应结合化疗药物类型、研究目的和表型稳定性要求合理选择实验动物性别,并将性别作为模型标准化和结果解释的重要变量。

关键词: 化疗诱导性脱发, 环磷酰胺, 紫杉醇, 性别差异, C57BL/6J小鼠, XY(Sry?)小鼠

Abstract:

Objective To evaluate the effect of sex on phenotypic stability in mouse models of chemotherapy-induced alopecia (CIA) induced by cyclophosphamide (CYP) or paclitaxel (PTX), and to explore potential mechanisms underlying phenotypic heterogeneity in female mice. Methods Twenty-eight wild-type specific pathogen-free (SPF) C57BL/6J mice (half male and half female) aged 6-8 weeks were selected for synchronous back hair removal. On the 9th day after hair removal (T0), the mice were randomly divided into a wild-type female CYP group, a wild-type male CYP group, a female negative control group and a male negative control group. Mice in the CYP groups were intraperitoneally injected with a single dose of 120 mg/kg CYP, and mice in the negative control groups were intraperitoneally injected with the same volume of normal saline. Subsequently, the phenotypic changes of the CIA model induced by CYP were continuously observed and photographed. Eleven 6-week-old SPF female C57BL/6J mice underwent bilateral ovariectomy (OVX group). Following successful surgery, these mice and five XY (Sry⁻) mice bred from Four Core Genotypes breeding stock were used to establish the chemotherapy-induced alopecia (CIA) model using the same protocol. Serum was collected from mice in the OVX group, wild-type female CYP group, and wild-type male CYP group on T7 after CYP administration for steroid hormone analysis by mass spectrometry to evaluate the effects of gonadal estrogen and sex chromosome background changes on the stability of the CYP-induced female alopecic phenotype. Finally, twenty SPF C57BL/6J mice aged 6-8 weeks (half male and half female) were randomly divided into a PTX low-dose group and a PTX high-dose group. On the 9th day after simultaneous hair removal, PTX was injected intraperitoneally at a single dose of 80 mg/kg or 120 mg/kg, respectively. Mice from the PTX low-dose group and the PTX high-dose group were continuously observed and photographed to compare the intra-group consistency of the phenotypes of female and male mice. Six SPF C57BL/6J mice (half male and half female) aged 6-8 weeks were used to repeat the construction method of the PTX low-dose group, and the hair follicle histological examination was performed at T0, T4, T7, T14 and T21, respectively, to observe the damage caused by PTX to hair follicle regeneration. Results The phenotypes of CYP-induced male CIA mice are stable and reproducible. There are obvious individual differences in the alopecia phenotype in the CYP-induced female CIA model mice, which may be mainly caused by the differences in the relevant estrogens in the estrous cycle. The difference between OVX+CYP group and XY (Sry⁻) +CYP group disappeared, suggesting that ovarian-derived hormones and XY (Sry⁻) sex chromosome background may be involved in the formation of phenotypic heterogeneity of CYP-induced alopecia in female mice. The mice in the high-dose PTX group and the low-dose PTX group showed a relatively consistent alopecia and regrowth process, and there was no significant sex difference. Conclusion CYP-induced CIA is strongly influenced by sex, and ovariectomy or alteration of the sex chromosome background can improve the consistency of CYP-induced alopecic phenotypes in female mice. PTX-induced CIA shows good phenotypic consistency in both female and male mice, indicating broad applicability across sexes. Taken together, the choice of animal sex in CIA model construction, mechanistic studies, and evaluation of anti-alopecia interventions should take into account the type of chemotherapeutic agent, the study objective, and the required degree of phenotypic stability. Sex should therefore be considered an important variable in model standardization and interpretation of experimental findings.

Key words: Chemotherapy-induced alopecia, Cyclophosphamide, Paclitaxel, Sex differences, C57BL/6J mice, XY(Sry ?) mice

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