Body odours as a chemosignal in the mother–child relationship: new insights based on an human leucocyte antigen-genotyped family cohort

Body odours as a chemosignal in the mother–child relationship: new insights based on an human leucocyte antigen-genotyped family cohort
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体味作为母子关系中的化学信号:基于人类白细胞抗原基因分型的家庭队列的新见解

DOI:
10.1098/rstb.2019.0266
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发表时间:
2020
期刊:
Philosophical Transactions of the Royal Society B: Biological Sciences
影响因子:
--
通讯作者:
Schmidt
Schmidt
中科院分区:
--
文献类型:
--
作者:
Schäfer;Sorokowska;Sauter;Schmidt

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母亲能够识别自己孩子的体味(BO),并且比其他BO更喜欢这种气味。因此,已经假设婴儿BO作为促进有针对性的父母护理的化学信号起作用。我们检验了这一假设,并研究了儿童的BO信号是否与母亲的遗传相似性和发育状况。此外,我们还评估了BO是否有助于避免近亲繁殖(Westermarck效应)。在横断面设计中,N= 164名母亲与她们的亲生子女(N= 226名儿童,年龄0-18岁)一起参与,并评估了她们自己和其他四名性别匹配的儿童的BO探针。这些人在年龄和遗传相似性方面各不相同,这是通过人类白细胞抗原分析来评估的。研究表明,母亲不仅识别并偏爱自己孩子的BO,而且遗传相似性和发育状态也在BO中转录。因此,母亲对自己孩子气味的偏好在整个发育过程中都会发生变化。我们的数据部分支持Westermarck效应:母亲对青春期男孩的BO的偏好与自己儿子的睾丸激素呈负相关,但对不熟悉的孩子则不然。
Mothers are able to identify the body odour (BO) of their own child and prefer this smell above other BOs. It has hence been assumed that the infantile BO functions as a chemosignal promoting targeted parental care. We tested this hypothesis and examined whether children's BOs signal genetic similarity and developmental status to mothers. In addition, we assessed whether BOs facilitate inbreeding avoidance (Westermarck effect). In a cross-sectional design,N= 164 mothers participated with their biological children (N= 226 children, aged 0–18 years) and evaluated BO probes of their own and four other, sex-matched children. Those varied in age and in genetic similarity, which was assessed by human leucocyte antigen profiling. The study showed not only that mothers identified and preferred their own child's BO, but also that genetic similarity and developmental status are transcribed in BOs. Accordingly, maternal preference of their own child's odour changes throughout development. Our data partly supported the Westermarck effect: mothers' preference of pubertal boys' BOs was negatively related to testosterone for the own son, but not for unfamiliar children.This article is part of the Theo Murphy meeting issue ‘Olfactory communication in humans’.
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