在著重修身的時代上,脂肪是一個較為負面性的用詞。957Please respect copyright.PENANAJGedRFOzCq
957Please respect copyright.PENANAldFEpBhLfQ
而在學術層面上,脂肪大致上可分為三種;957Please respect copyright.PENANAfmmuze6J0S
白色脂肪(White Fat)、米色脂肪(Beige Fat)及啡色脂肪(Brown Fat)。957Please respect copyright.PENANAEclB5N4fiZ957Please respect copyright.PENANAJQy7DXGkKn
957Please respect copyright.PENANAzCGz6eITBs
(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。957Please respect copyright.PENANAfIrmBJ691Y
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。957Please respect copyright.PENANAFBiAExAcnx
957Please respect copyright.PENANAd3AiilVUS2
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;957Please respect copyright.PENANANbs1rylSIc
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。957Please respect copyright.PENANA6Qdx8173CQ
957Please respect copyright.PENANAAmy0KxOECi
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。957Please respect copyright.PENANAMQUjzKtEo5
957Please respect copyright.PENANAiMX81lDz0y
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。957Please respect copyright.PENANAf2HS3clKkx
957Please respect copyright.PENANAjkPbNV2dib
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。957Please respect copyright.PENANA71Hrkkxc1I
957Please respect copyright.PENANA2Pw9c3aVJy
這亦是為何年紀越大越容易擁有大肚腩的其中一個原因。957Please respect copyright.PENANAf7stPOVEKX
957Please respect copyright.PENANA6KSmkd6NlC
957Please respect copyright.PENANAZZn43G891N
957Please respect copyright.PENANAMtSaIxsyCS
(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!957Please respect copyright.PENANAprvk2s5UYX
957Please respect copyright.PENANAY5SpH3QYZD957Please respect copyright.PENANA799frJ8OCy
957Please respect copyright.PENANAfPz7hSQvKG
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。957Please respect copyright.PENANAoz1PQtRgQC
957Please respect copyright.PENANAflhIHe4bKE
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。957Please respect copyright.PENANA74TPxYXYV2
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957Please respect copyright.PENANAsU1QnNydsS
957Please respect copyright.PENANA7buGRV5iia
957Please respect copyright.PENANA3S3mWvRTcE
(圖3)近日有科學家發表文章(Ref1),發表關於啡色脂肪的研究。957Please respect copyright.PENANAwMXXViLfdq
957Please respect copyright.PENANA6QQWlZHA9l957Please respect copyright.PENANAikMjeKl90K
957Please respect copyright.PENANAgqAmSt0U7R
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。957Please respect copyright.PENANAVXrgirXzf4
957Please respect copyright.PENANAkqNmkuM4y1
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。957Please respect copyright.PENANAoEr13OZIGU
957Please respect copyright.PENANA4vTvFcsy49
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。957Please respect copyright.PENANAf18TnfLTNB
957Please respect copyright.PENANAdF67lmezqf
957Please respect copyright.PENANAMJiYaxkh6v
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。957Please respect copyright.PENANAvrgMds0fyd
957Please respect copyright.PENANAKS2KjdJGJp
957Please respect copyright.PENANALd3opGS6fH
957Please respect copyright.PENANArkRGgQSWkz
957Please respect copyright.PENANAFXyeNtw55d
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。957Please respect copyright.PENANAE82v0r5pzK
957Please respect copyright.PENANAByR6UWTQyO
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/toc957Please respect copyright.PENANAsQ8eKndRQh
957Please respect copyright.PENANAAmghAJCsUl
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。957Please respect copyright.PENANAxRD1HL7KjT
957Please respect copyright.PENANASV21MCCg2g
Link:957Please respect copyright.PENANA6DUlnT1gd8
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio957Please respect copyright.PENANAbpEjKBlCqM
957Please respect copyright.PENANAFuc9mUBMbA
957Please respect copyright.PENANA3kwUKOB9pY
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。957Please respect copyright.PENANADs7IsxPVR5
957Please respect copyright.PENANAIotJdsNyW0
Ref1: https://stm.sciencemag.org/content/12/558/eaaz8664957Please respect copyright.PENANAWtihWyrFbm
arrow_back
科普專欄–薯不揀單
more_vert
-
info_outline Info
-
toc Table of Contents
-
share Share
-
format_color_text Display Settings
-
exposure_plus_1 Recommend
-
Sponsor
-
report_problem Report
-
account_circle Login
Search stories, writers or societies
Continue ReadingClear All
What Others Are ReadingRefresh
X
Never miss what's happening on Penana!
科普專欄–薯不揀單
Author:
薯仔聞茱莉
![薯仔聞茱莉](https://static2.penana.com/fit-in/24x24/images/users/large/10/56/10560680635a34d605a71d62.38826921-27349.jpeg)
ISSUE #33
深入淺出–啡色脂肪
LIKES 2
READS 953
BOOKMARKS 148
campaign
Request update 0
Sponsor
![](https://static2.penana.com/img/social/facebook.png)
Click to load the next chapter
X
After each update request, the author will receive a notification!
smartphone100 → Request update
X
Sponsor again
Click to login
Login first to show your name as a sponsor.
Thank you for supporting the story! :)
Please Login first.
×
Write down what you like about the story
×
Reading Theme:
Font Size:
Line Spacing:
Paragraph Spacing:
Load the next issue automatically
Reset to default
×
People Who Like This