주인과 개의 유대 관계는 ‘사랑 호르몬’ Scientists Probe Puppy Love
A direct, friendly gaze seems to help cement the bond of affection between people and their pooches.
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Dan Perez/Flickr
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케이콘텐츠 편집
이번 주 ‘네이처’에는 울퉁불퉁한 세포 몇 개가 실렸다. 이들은 ‘암세포주’로, 암세포의 일가(一家)를 의미한다.
사이언스 제공 암세포는 정상세포보다 잘 자라기 때문에 주로 실험실에서 연구를 위한 목적으로 배양한다. 따라서 실험실에서는 다양한 암세포주를 확보하고 있다. 하지만 실험실이 보유한 많은 암세포주가 다른 세포에 오염됐거나 라벨이나 설명이 잘못 표기된 것으로 알려졌다.
미국 진앤테크(Genentech) 사 리저트 니브 박사팀은 이번 주 네이처에 이들 암세포주를 더욱 명확하게 인증하고 알맞은 이름표를 달 수 있는 방법을 제시했다.
연구팀이 대상으로 삼은 세포주는 무려 3500개 이상. 연구팀은 이들 각각의 단일염기서열(SNP, Single Nucleotide Polymorphism)과 염기서열반복구간(STR, Short Tandem Repeat)에 대한 정보를 자료로 제공하고 이를 바탕으로 정확한 단어를 이용한 표준 명명법을 제안했다. 신선미 기자 vamie@donga.com |
Scientists Probe Puppy Love
네이처 제공
Geoff Brumfiel It's a question that bedevils dog owners the world over: "Is she staring at me because she loves me? Or because she wants another biscuit?" Research published Thursday in the journal Science suggests that love (or something close) could be behind that stare. The work shows that when dogs and their people gaze into each other's eyes, all get a boost in their circulating levels of oxytocin — a hormone thought to play a role in trust and emotional bonding. The results suggest that both dogs and people feel it, something few dog owners would doubt. "It's really cool that there's actually some science to back this up now," says Evan MacLean, an evolutionary anthropologist and co-director of Duke University's Canine Cognition Center. For thousands of years, humans have bred dogs for obedience, and that has altered their brains as well. For example, MacLean says, dogs are excellent at understanding gestures like pointing. They're also good with language. But have humans also bred dogs for affection? "Well, it's a harder one to get at, partially because emotions are so subjective," MacLean says. For instance, many owners say their dog feels guilty after behaving badly, but that's not true. |
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