在著重修身的時代上，脂肪是一個較為負面性的用詞。1379Please respect copyright.ＰＥＮＡＮＡUEEElcBbcO
1379Please respect copyright.ＰＥＮＡＮＡ94KHdB0csr
而在學術層面上，脂肪大致上可分為三種；1379Please respect copyright.ＰＥＮＡＮＡCqyQFRf6iA
白色脂肪(White Fat)、米色脂肪(Beige Fat)及啡色脂肪(Brown Fat)。1379Please respect copyright.ＰＥＮＡＮＡZzTxuWUlAs
1379Please respect copyright.ＰＥＮＡＮＡ84FNZsDIAx
1379Please respect copyright.ＰＥＮＡＮＡXKC1BO0XJD
（圖1）白色脂肪的特徵就是油脂體積非常大，佔據細胞大部份的位置。1379Please respect copyright.ＰＥＮＡＮＡqQqPtcS3N1
而啡色及米色的油脂體積則較為細少，不會佔據細胞大部份位置。1379Please respect copyright.ＰＥＮＡＮＡvsbCUVD0RU
1379Please respect copyright.ＰＥＮＡＮＡamlmAhtRcs
至所以會用顏色來形容及命名脂肪，原因是因為它們所含的鐵質數量不同，越多數量的粒線體(Mitochondria)，鐵質含量便會越高，在顯微鏡的染色片上能夠呈現更深色的啡色;1379Please respect copyright.ＰＥＮＡＮＡ7DDxu3G3RM
基於粒線體的性質不同，白色脂肪會將食物的養份轉化成為能量而儲存，而米色及啡色脂肪則會將食物養份轉化成為熱能。1379Please respect copyright.ＰＥＮＡＮＡ2Yl6Jxt0oc
1379Please respect copyright.ＰＥＮＡＮＡBlDZFihAAV
肚腩，就是由白色脂肪主要構成，任何多餘的營養均會儲存下來。而處於頸部、鎖骨位置及盤骨裡的啡色脂肪，則不會把過剩的能源儲存，一一化作成為熱能。1379Please respect copyright.ＰＥＮＡＮＡzEA4s5UUso
1379Please respect copyright.ＰＥＮＡＮＡjefWfnK7BJ
換句話說，若然我們身體的脂肪全都是啡色脂肪的話，我們所進食的過量營養一一會變作為熱能散走，不會變作成為肚腩。1379Please respect copyright.ＰＥＮＡＮＡHxHDaqGCVj
1379Please respect copyright.ＰＥＮＡＮＡOneR2TIXZE
可惜的是，啡色脂肪會隨著年紀增加而減少；我們在嬰兒的時候會有大量啡色脂肪作保溫之用，而長大後則會逐一減少。1379Please respect copyright.ＰＥＮＡＮＡxnUDCBlhux
1379Please respect copyright.ＰＥＮＡＮＡnsPe8vSVG5
這亦是為何年紀越大越容易擁有大肚腩的其中一個原因。1379Please respect copyright.ＰＥＮＡＮＡzm1XtgWeyi
1379Please respect copyright.ＰＥＮＡＮＡvVljI1SRmg
1379Please respect copyright.ＰＥＮＡＮＡk49M00eIZG
1379Please respect copyright.ＰＥＮＡＮＡokQKjkQU7P
（圖2）將肚腩變成為米色脂肪的話，自當然是減肥的絕世大計!1379Please respect copyright.ＰＥＮＡＮＡFIT7muxU30
1379Please respect copyright.ＰＥＮＡＮＡ77vcG1XZmP
1379Please respect copyright.ＰＥＮＡＮＡccTc3R41CS
1379Please respect copyright.ＰＥＮＡＮＡGAGJZA24qz
而將肚腩(白色脂肪)變成為米色脂肪，現實上是可行的，這過程我們稱之為Browning。1379Please respect copyright.ＰＥＮＡＮＡCw2le1kQPn
1379Please respect copyright.ＰＥＮＡＮＡvhzPOewSs8
做運動、長期暴露在寒冷氣候，均會產生出不同荷爾蒙催化Browning發生。1379Please respect copyright.ＰＥＮＡＮＡJ2zSFHgkjx
現時有不少科學家均積極研究Browning的確實機制，希望可以藉此來把白色脂肪轉化成為米色或啡色脂肪，藉此醫治癡肥及糖尿問題1379Please respect copyright.ＰＥＮＡＮＡRR05DRTHSo
1379Please respect copyright.ＰＥＮＡＮＡU4dhwshYlG
1379Please respect copyright.ＰＥＮＡＮＡqj0JMv6D14
（圖3）近日有科學家發表文章（Ref1)，發表關於啡色脂肪的研究。1379Please respect copyright.ＰＥＮＡＮＡFxxEV3LoYI
1379Please respect copyright.ＰＥＮＡＮＡQEBXjKCATa
1379Please respect copyright.ＰＥＮＡＮＡiso4n8jUEP
1379Please respect copyright.ＰＥＮＡＮＡZ1lVjhKgz9
他們抽取健康人士頸部的脂肪細胞，並利用CRISPR基因技術把它們催化成為功能類近啡色脂肪的細胞。1379Please respect copyright.ＰＥＮＡＮＡTAmO6LA8CT
1379Please respect copyright.ＰＥＮＡＮＡ36iRw3ZA64
他們分別把那名人士的白色脂肪及類近啡色脂肪注射到老鼠身上，作出各式各樣的實驗。1379Please respect copyright.ＰＥＮＡＮＡVMzrwTtHvh
1379Please respect copyright.ＰＥＮＡＮＡu9gpZvl9IW
其中一個實驗就是餵食老鼠高脂餐單持續3個月，並證實注射了啡色脂肪的老鼠體重明顯較輕，以及清楚找出了箇中的分子機制。1379Please respect copyright.ＰＥＮＡＮＡKCBxrny2CR
1379Please respect copyright.ＰＥＮＡＮＡOsr2LzVfCe
1379Please respect copyright.ＰＥＮＡＮＡq8MVnwcufW
這一份研究所帶來的啟示，就是日後大有可能可以發展出抽取人類自身頸部的脂肪細胞、再把其轉化成為啡色脂肪注射回該名人士身上的減肥/治療癡肥/糖尿病的手法。1379Please respect copyright.ＰＥＮＡＮＡihvLl5s8tB
1379Please respect copyright.ＰＥＮＡＮＡulKUHlQ997
1379Please respect copyright.ＰＥＮＡＮＡYyRxKfISJa
1379Please respect copyright.ＰＥＮＡＮＡPYv3dvM2bX
1379Please respect copyright.ＰＥＮＡＮＡ2X5HiH8zkv
如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。1379Please respect copyright.ＰＥＮＡＮＡC1sHkmTD7u
1379Please respect copyright.ＰＥＮＡＮＡVhZ2MxjxlP
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc1379Please respect copyright.ＰＥＮＡＮＡPKixYjuqor
1379Please respect copyright.ＰＥＮＡＮＡpTHgtG5f2R
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。1379Please respect copyright.ＰＥＮＡＮＡqpVWQczXXg
1379Please respect copyright.ＰＥＮＡＮＡILzUYO65z5
Link:1379Please respect copyright.ＰＥＮＡＮＡtOtJGe1jN3
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1379Please respect copyright.ＰＥＮＡＮＡtmvF2OobNe
1379Please respect copyright.ＰＥＮＡＮＡIqunxdg7qN
1379Please respect copyright.ＰＥＮＡＮＡjdCmA3Hqw0
有興趣接收科普資訊的話，歡迎follow IG: potatopigtongue。1379Please respect copyright.ＰＥＮＡＮＡRjJ2gga33v
1379Please respect copyright.ＰＥＮＡＮＡBS12uvcxGh
Ref1: https://stm.sciencemag.org/content/12/558/eaaz86641379Please respect copyright.ＰＥＮＡＮＡa2hVdVhb69
Penana
search
登入arrow_drop_down
註冊arrow_drop_down
