在著重修身的時代上,脂肪是一個較為負面性的用詞。936Please respect copyright.PENANAZ5Wn6u8zR7
936Please respect copyright.PENANAXdZ3RLZoDR
而在學術層面上,脂肪大致上可分為三種;936Please respect copyright.PENANAruPV0ZpfeN
白色脂肪(White Fat)、米色脂肪(Beige Fat)及啡色脂肪(Brown Fat)。936Please respect copyright.PENANAF68hz2mFiw
936Please respect copyright.PENANA59VtOX86Oh
936Please respect copyright.PENANANO63iUJgMQ
(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。936Please respect copyright.PENANA7WlPKUj8sc
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。936Please respect copyright.PENANAGD6pCO7oRi
936Please respect copyright.PENANAvMdnV3ToGB
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;936Please respect copyright.PENANAg8pU4HBDfC
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。936Please respect copyright.PENANA3DkXQpFSmC
936Please respect copyright.PENANArMF4el4wNS
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。936Please respect copyright.PENANAOMvVGcM6JH
936Please respect copyright.PENANARyyj4LaVci
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。936Please respect copyright.PENANAjm4OnTWiir
936Please respect copyright.PENANAdsAzTVkXeY
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。936Please respect copyright.PENANADnQ7tvfq4P
936Please respect copyright.PENANA1X6KDJpZ9U
這亦是為何年紀越大越容易擁有大肚腩的其中一個原因。936Please respect copyright.PENANA3reOnj6aYY
936Please respect copyright.PENANAju4UYn4EhB
936Please respect copyright.PENANA6fRITqEWNz
936Please respect copyright.PENANA1XngQqhxM3
(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!936Please respect copyright.PENANAVQn62mUkZb
936Please respect copyright.PENANAPhLb6nCM0C
936Please respect copyright.PENANAV3EePlauGT
936Please respect copyright.PENANAeXXfYyTP8B
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。936Please respect copyright.PENANAzpEXH95BRN
936Please respect copyright.PENANAZi2YeHOFsw
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。936Please respect copyright.PENANAFMMAPMcbfA
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936Please respect copyright.PENANAVYQmfmAj3V
936Please respect copyright.PENANAtWxffpVTF1
936Please respect copyright.PENANAFJKbGURtYZ
(圖3)近日有科學家發表文章(Ref1),發表關於啡色脂肪的研究。936Please respect copyright.PENANAvRdf6L3dBK
936Please respect copyright.PENANAJc2wePL3Uw
936Please respect copyright.PENANAzDGfmdq5sL
936Please respect copyright.PENANAyRSbdD3ueU
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。936Please respect copyright.PENANAM3A5QkrxO7
936Please respect copyright.PENANADxPHnVmf4x
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。936Please respect copyright.PENANAb1rOZKtUX9
936Please respect copyright.PENANAhlb6Z0B4pN
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。936Please respect copyright.PENANAQp55NAAv1Y
936Please respect copyright.PENANAoOldPSq3gT
936Please respect copyright.PENANAjVg1KV8dZU
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。936Please respect copyright.PENANAoNqEcEY2nI
936Please respect copyright.PENANAlcrmNKDXKO
936Please respect copyright.PENANArjWIwrM3xm
936Please respect copyright.PENANAoqVVi7K8QM
936Please respect copyright.PENANAf8n9f4RiGx
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。936Please respect copyright.PENANAburWPx87sF
936Please respect copyright.PENANAmc0HOqVG8h
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/toc936Please respect copyright.PENANAi2Cb5ZHc5C
936Please respect copyright.PENANAZX0Ci4qgs8
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。936Please respect copyright.PENANAy9ZCkRRkt9
936Please respect copyright.PENANAvrtY3yzqcq
Link:936Please respect copyright.PENANA8by8Ihkn0X
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio936Please respect copyright.PENANA59vIkmBjrp
936Please respect copyright.PENANAkUltVIWpGM
936Please respect copyright.PENANACeHvOUoe6u
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。936Please respect copyright.PENANAxIqn5nwGAd
936Please respect copyright.PENANA1Kb334bTBT
Ref1: https://stm.sciencemag.org/content/12/558/eaaz8664936Please respect copyright.PENANADIj9YH6fXL
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline 資料
-
toc 目錄
-
share 分享
-
format_color_text 介面設置
-
exposure_plus_1 推薦
-
打賞
-
report_problem 檢舉
-
account_circle 登入
X
科普專欄–薯不揀單
作者:
薯仔聞茱莉
篇 #33
深入淺出–啡色脂肪
喜歡 2
閱讀 932
書籤 148
campaign
催更 0
打賞
以 Facebook 帳號登入
或 註册/登入 以留言或加上書籤
按此加載下一章
X
每次催更後,作者都會收到通知!
smartphone100 → 催更
×
寫下你喜歡這個故事的地方
×
對此喜歡的人