
国际学术期刊《自然-通讯》发表的一项神经科学论文显示,更年期阶段的灰质体积保持相对稳定。
国际学术期刊《自然-通讯》最新发表的一项脑成像研究发现,女性大脑在更年期的变化与在妊娠期和青春期有着鲜明差异。青春期和妊娠期与皮层灰质体积减少相关,而更年期过渡阶段的灰质体积保持相对稳定。
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青春期、妊娠期和更年期是女性生命周期中重大的激素过渡阶段,对大脑的影响深远。
中新网北京9月9日电 (记者 孙自法)国际学术期刊《自然-通讯》最新发表一篇神经科学论文称,一项脑成像研究发现,女性大脑在更年期的变化与在妊娠期和青春期有着鲜明差异。
这项研究对象包括200余名活跃参与者,结果表明青春期和妊娠期都与皮层灰质体积减少相关,而更年期的特征是这一过渡阶段的灰质体积保持相对稳定。
该论文介绍,青春期、妊娠期和更年期是女性生命周期中重大的激素过渡阶段,对大脑的影响深远。目前还不清楚这三个阶段中的变化是否涉及共同或不同机制。此外,尽管过去已有研究考察过青春期和妊娠期的大脑变化,但对更年期相关变化的研究相对较少。
在本项研究中,论文第一作者和通讯作者、荷兰阿姆斯特丹大学医学中心Sophie R. van’t Hof与同事及合作者一起,分析了青春期(34人)、妊娠期(70人)和更年期(120人)过渡阶段的多个时间点的结构性磁共振成像(MRI)数据,与年龄相近且处于相应过渡阶段前后的对照组(分别为108、40和723人)进行比较。
与对照组相比,青春期月经初潮和妊娠期的过渡阶段都与总体灰质和皮层灰质的月度减少加速相关。两组的灰质减少在一些区域相近,包括前额叶、顶叶和颞叶联合皮层,但在其他区域存在差异。相比之下,更年期的过渡与更年期前后对照组相比没有明显的总灰质或皮层灰质减少。论文作者推断,更年期阶段没有年龄相关的下降,可能与此前观察到的性类固醇激素水平下降相关,但还需要进一步研究确立因果联系。
论文作者认为,这些比较研究发现表明,青春期、妊娠期和更年期与大脑结构变化的不同模式相关,而非对激素变化单一、统一的反应。
他们也提醒指出,本项研究存在一些局限,如更年期状态依赖自我报告,缺乏全队列的直接激素检测数据。因此,未来还需要进一步研究纳入标准化、可比较的激素和影像数据,以厘清这些模式背后的生物机制。(完)
AI outlook — possibilities, not facts
未来将开展进一步研究,纳入标准化、可比较的激素和影像数据以厘清生物机制
Likely · Within months
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