在著重修身的時代上,脂肪是一個較為負面性的用詞。938Please respect copyright.PENANAMgBw6tZDHT
938Please respect copyright.PENANAl7sjz81VbP
而在學術層面上,脂肪大致上可分為三種;938Please respect copyright.PENANAl9NlbEAuxa
白色脂肪(White Fat)、米色脂肪(Beige Fat)及啡色脂肪(Brown Fat)。938Please respect copyright.PENANATLoEvrDTmK
938Please respect copyright.PENANAK2qGXilzgJ
938Please respect copyright.PENANAbZ0gMIKBI6
(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。938Please respect copyright.PENANACLd4PrAzsg
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。938Please respect copyright.PENANAsYZK0laZ8L
938Please respect copyright.PENANA47RsqUEN67
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;938Please respect copyright.PENANAxHoFCDteUO
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。938Please respect copyright.PENANAaXC1zdBNbL
938Please respect copyright.PENANAK6QdpVCWea
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。938Please respect copyright.PENANApj34ZtO9tI
938Please respect copyright.PENANAVDAFDC2WUF
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。938Please respect copyright.PENANAckCCnzWtyJ
938Please respect copyright.PENANAL9SoMuQEBb
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。938Please respect copyright.PENANAUimpzpVQaT
938Please respect copyright.PENANAPyuSVu5Rs5
這亦是為何年紀越大越容易擁有大肚腩的其中一個原因。938Please respect copyright.PENANAVL57FX4cDi
938Please respect copyright.PENANAEoFVz0VkPd
938Please respect copyright.PENANABDEQKi8vJf
938Please respect copyright.PENANAN9wppksrCd
(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!938Please respect copyright.PENANA8mR4dLiCX4
938Please respect copyright.PENANA2CriDj1Pr6
938Please respect copyright.PENANA6fLGGGfKhg
938Please respect copyright.PENANAwl8QUEocDX
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。938Please respect copyright.PENANAzG3Q3d1XLt
938Please respect copyright.PENANAWhqdo1s4kb
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。938Please respect copyright.PENANA19aS76nYU4
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938Please respect copyright.PENANApJTyyQJuJ3
938Please respect copyright.PENANALl01REnYyQ
938Please respect copyright.PENANAl3Q8ZR37L7
(圖3)近日有科學家發表文章(Ref1),發表關於啡色脂肪的研究。938Please respect copyright.PENANAjiiI6AiUdf
938Please respect copyright.PENANA0bazlosGjE
938Please respect copyright.PENANAB1UNAgEYeC
938Please respect copyright.PENANATubxktMz0n
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。938Please respect copyright.PENANADtwmaymcEt
938Please respect copyright.PENANAHa9L2gpioV
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。938Please respect copyright.PENANAMaUN1bOAJR
938Please respect copyright.PENANA05n0qcMiqJ
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。938Please respect copyright.PENANAbp69Jn6ZQr
938Please respect copyright.PENANAr7XSREw4GR
938Please respect copyright.PENANAjgD7xtpLNa
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。938Please respect copyright.PENANA11eXvO8moI
938Please respect copyright.PENANAPPMKO5hpoZ
938Please respect copyright.PENANAvrK24tRUua
938Please respect copyright.PENANAR5uKFSZApN
938Please respect copyright.PENANAjX2oYHgoPS
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。938Please respect copyright.PENANApt8ZpP867Q
938Please respect copyright.PENANAwic5yvpiLb
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/toc938Please respect copyright.PENANAcpFLZQM1VQ
938Please respect copyright.PENANAkhA79gSgkM
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。938Please respect copyright.PENANApg4UgZS2BD
938Please respect copyright.PENANA6lnkpViXbC
Link:938Please respect copyright.PENANAls7QMK7KJz
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio938Please respect copyright.PENANAimWAveBkoB
938Please respect copyright.PENANAWrJrbzJ4nQ
938Please respect copyright.PENANAUVYHG3WmxE
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。938Please respect copyright.PENANAma0Rg7B1hY
938Please respect copyright.PENANAm4cwKiGq1C
Ref1: https://stm.sciencemag.org/content/12/558/eaaz8664938Please respect copyright.PENANAwAMr0t0okV
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 934
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