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Breast milk may protect babies from infection of coronavirus
Published on: 2020-09-30
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breast 01Breast milk may help protect babies from being infected by the novel coronavirus, a new study suggests.

Researchers at a lab in China found that mother's milk prevented the pathogen from infecting and replicating in cells, even if the child does not have antibodies.

What's more, it was shown to be even more effective than the milk of other animals such as goats and cows.

The team, from Beijing University of Chemical Technology, says the findings support the recommendation from the World Health Organization (WHO) that mothers with suspected or confirmed COVID-19 be encouraged to continue breastfeeding.

breast 02For the study, published on pre-peer review site bioRxiv.org, the team exposed human lung and gut cells to SARS-CoV-2.

Next, they analyzed what effect breast milk, which was collected in 2017 - before the pandemic - had on the cells.

Healthy cells were mixed into human breast milk. Then the milk was washed off and the cells were exposed to the virus.

The virus did not bind to or enter most of the cells. Additionally, if it did enter cells, the virus was not able to make copies of itself.

This suggests breast milk can inhibit the coronavirus as it does other viruses such as norovirus and bacteria.

'SARS-CoV-2 could infect [cells] and the infection could be inhibited by breastmilk (2 mg/ml) , which was reported to have anti-SARS-CoV-2 activity,' the authors wrote.

breast 03In a previous study, the same research team found breast milk prevented coronavirus infection in animal kidney cells.

They determined the whey protein, which has anti-inflammatory properties, was responsible for inactivating the virus rather than other proteins such as lactoferrin.

'Whey protein from human breastmilk effectively inhibited...SARS-CoV-2...by blocking viral attachment, entry and even post-entry viral replication,' they wrote.

This was also true when milk was tested from those of others animals included cows and goats.

However, the whey from animals suppressed the viral strains by approximately 70 percent compared to the nearly 100 percent of human whey.

The team says that even if viral genetic material is found in breastmilk, it doesn't mean it's infectious or can be spread to babies.

母乳可阻止细胞感染新冠病毒,甚至对病毒有超强灭活作用

今年5月,国际权威医学期刊《柳叶刀》刊发的一项来自德国的研究结果显示:母乳中能检测到新冠病毒RNA。由此,许多人开始质疑母乳喂养的安全性,担心母乳中存在具有传染性的新冠病毒。

但近日中国科学家进行的一项研究发现,即使母亲感染COVID-19也应该继续坚持母乳喂养,因为母乳可以预防甚至治疗COVID-19。

上周五,北京化工大学的研究人员在biorxiv.org上发表的未经同行评审的论文中指出,母乳能够阻碍病毒的附着、进入,甚至在人体内进行复制的能力。

该研究小组测试了母乳对暴露于Sars-CoV-2(新冠病毒)的细胞的影响。用于测试的母乳是在2017年收集的,远早于疫情爆发,测试的细胞类型从动物肾脏细胞到年轻的人类肺部和肠道细胞多种多样。

结果发现,无论病毒感染哪种类型的细胞,大多数活毒株都被杀死了。

研究人员观察到几乎没有病毒与这些细胞结合或进入细胞,而且这种方式还阻止了病毒在已经感染的细胞中进行复制。因此他们得出的结论是,母乳可以抑制感染Sars-CoV-2。

另外,中国疾病预防控制中心官网也显示:迄今为止,尚未发现导致感染的2019冠状病毒病的活病毒可通过母乳和母乳喂养传播。没有理由避免或停止母乳喂养。

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