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不只是培养基:隐藏在iPSC维持培养基里的“细胞信号” 别再说它只是“营养液”!
来源:索码生物 发布日期:2026-01-26 浏览次数:23次

 

iPSC培养基,实为细胞命运的操控台

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

你以为它只是细胞的“盒饭”?其实它是一位运筹帷幄的“总指挥”!

iPSC的培养世界里,我们日复一日地操作着换液、传代。那一瓶瓶清澈的维持培养基,在我们眼中,或许只是干细胞的“营养餐”,提供些氨基酸、维生素和糖分。

但今天,我们要揭开它神秘的面纱。这瓶看似简单的液体,实则是一个精心设计的“信号王国”,里面充满了决定细胞命运的“密语”与“指令”。

 

 

iPSC

任性与培养基的坚守

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

为什么iPSC可以如此“任性”?给它一点“颜色”(信号),它就能分化为神经、心肌或任何你想要的细胞。反之,若我们想让它维持“初心”——即无限增殖的多能性状态,就必须创造一个绝对纯净、稳定的环境。

这个环境的核心缔造者,就是维持培养基。它的首要任务,不是喂饱细胞,而是 “发号施令”——持续不断地告诉iPSC保持自我,避免分化。

 

 

 

解码培养基里的三重信号协奏曲

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

维持培养基如何发号施令?关键就在于它精准调控的几条核心信号通路。让我们来认识一下这三位幕后“指挥官”:

1.TGF-β/Activin A 通路: “我是谁”

作用机制:这条通路是维持iPSC多能性(尤其是“初始态”Naïve状态向“始发态”Primed状态过渡)的关键。它通过激活下游的SMAD蛋白,直接上调核心多能性转录因子(如OCT4, SOX2, NANOG)的表达。简单说,它每天都在对细胞喊话:“记住,你是多能干细胞!你很强大!”

2. bFGF: “活下去,并增殖”

作用机制:bFGF是维持iPSC自我更新和增殖最重要的生长因子之一。它通过激活MAPK/ERK等通路,为细胞提供持续的增殖动力,同时与其他信号通路(如TGF-β)协同作用,共同抑制分化。

 

3. WNT 通路: “平衡大师”

作用机制:WNT通路在干细胞命运中扮演着复杂而微妙的角色。过强的WNT信号会驱动分化,而适度、稳定的WNT信号背景则是维持多能性所必需的。iPSC维持培养基会通过添加特定抑制剂(如IWP2)或激动剂,将WNT信号精确调控在一个“甜点”区间,既能支持自我更新,又不会触发分化。

 

 

 

实用技巧:读懂细胞的【信号语言】

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

在实际操作中,如何判断您的培养系统是否健康?请关注这些细胞信号的外在表现:

✔ 理想的克隆形态:边界清晰、扁平紧凑,核质比高

✔ 稳定的增殖速率:持续稳定的群体倍增时间

✔ 一致的多能性标志物表达:OCT4、SOX2、NANOG阳性率>90%

✔ 自发性分化率低:<10%

当这些指标出现波动时,往往意味着信号平衡被打破——可能是培养基成分失效,也可能是操作习惯需要调整。

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
结语

所以,下次当你拿起那一瓶iPSC维持培养基时,请赋予它更多的敬意。

它不再是一瓶简单的营养液,而是一个充满智慧的信号微环境,一个决定细胞命运的指挥中心。

它无声,却时刻在与你的细胞进行着最关键的对话。

读懂它,你就能更好地驾驭iPSC这把解锁再生医学未来的“金钥匙”。

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  168. /www/wwwroot/somaxbio.com/vendor/symfony/polyfill-mbstring/Mbstring.php ( 35.32 KB )
  169. /www/wwwroot/somaxbio.com/vendor/symfony/polyfill-mbstring/Resources/unidata/lowerCase.php ( 23.96 KB )
  170. /www/wwwroot/somaxbio.com/vendor/topthink/think-helper/src/Collection.php ( 16.47 KB )
  171. /www/wwwroot/somaxbio.com/vendor/topthink/think-orm/src/db/Express.php ( 1.53 KB )
  172. /www/wwwroot/somaxbio.com/vendor/topthink/think-view/src/Think.php ( 8.38 KB )
  173. /www/wwwroot/somaxbio.com/vendor/topthink/framework/src/think/contract/TemplateHandlerInterface.php ( 1.60 KB )
  174. /www/wwwroot/somaxbio.com/vendor/topthink/think-template/src/Template.php ( 46.61 KB )
  175. /www/wwwroot/somaxbio.com/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  176. /www/wwwroot/somaxbio.com/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  177. /www/wwwroot/somaxbio.com/runtime/temp/63ab06502311cf3cb46c41aa08a3a0d8.php ( 22.65 KB )
  178. /www/wwwroot/somaxbio.com/app/index/model/LabelModel.php ( 7.63 KB )
  179. /www/wwwroot/somaxbio.com/vendor/topthink/framework/src/think/Response.php ( 8.81 KB )
  180. /www/wwwroot/somaxbio.com/vendor/topthink/framework/src/think/response/Html.php ( 0.97 KB )
  181. /www/wwwroot/somaxbio.com/vendor/topthink/think-trace/src/Html.php ( 4.30 KB )
  1. CONNECT:[ UseTime:0.001030s ] mysql:host=localhost;port=3306;dbname=somaxbio_com;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `db_cat` [ RunTime:0.001523s ]
  3. SELECT * FROM `db_cat` WHERE `catid` = 11 LIMIT 1 [ RunTime:0.000708s ]
  4. SHOW FULL COLUMNS FROM `db_cat_data` [ RunTime:0.001908s ]
  5. SELECT * FROM `db_cat_data` WHERE `catid` = 11 LIMIT 1 [ RunTime:0.000499s ]
  6. SHOW FULL COLUMNS FROM `db_cms_news` [ RunTime:0.001771s ]
  7. SELECT * FROM `db_cms_news` WHERE `id` = 906 LIMIT 1 [ RunTime:0.003018s ]
  8. SHOW FULL COLUMNS FROM `db_cms_news_data` [ RunTime:0.001899s ]
  9. SELECT * FROM `db_cms_news_data` WHERE `id` = 906 LIMIT 1 [ RunTime:0.000766s ]
  10. SHOW FULL COLUMNS FROM `db_replace` [ RunTime:0.001645s ]
  11. SELECT * FROM `db_replace` ORDER BY `sort` ASC LIMIT 2 [ RunTime:0.000510s ]
  12. UPDATE `db_cms_news` SET `views` = `views` + 1 WHERE `id` = 906 [ RunTime:0.004398s ]
  13. SELECT `title`,`id`,`catid` FROM `db_cms_news` WHERE ( `catid` = 11 AND `id` <> 906 AND `newstime` >= 1769396632 ) ORDER BY `newstime` ASC,`id` ASC LIMIT 1 [ RunTime:0.001469s ]
  14. SELECT `titleurl`,`link` FROM `db_cms_news` WHERE `id` = 903 LIMIT 1 [ RunTime:0.000965s ]
  15. SELECT `title`,`id`,`catid` FROM `db_cms_news` WHERE ( `catid` = 11 AND `id` <> 906 AND `newstime` <= 1769396632 ) ORDER BY `newstime` DESC,`id` DESC LIMIT 1 [ RunTime:0.001521s ]
  16. SELECT `titleurl`,`link` FROM `db_cms_news` WHERE `id` = 905 LIMIT 1 [ RunTime:0.000830s ]
  17. SELECT * FROM `db_cat` WHERE ( `pid` = 7 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000883s ]
  18. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 20 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000496s ]
  19. SHOW FULL COLUMNS FROM `db_cms_product` [ RunTime:0.001942s ]
  20. SELECT * FROM `db_cms_product` WHERE ( `catid` = 20 ) ORDER BY `sort` ASC [ RunTime:0.000812s ]
  21. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 51 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000592s ]
  22. SELECT * FROM `db_cms_product` WHERE ( `catid` = 51 ) ORDER BY `sort` ASC [ RunTime:0.000942s ]
  23. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 21 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000568s ]
  24. SELECT * FROM `db_cms_product` WHERE ( `catid` = 21 ) ORDER BY `sort` ASC [ RunTime:0.000678s ]
  25. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 22 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000647s ]
  26. SELECT * FROM `db_cms_product` WHERE ( `catid` = 22 ) ORDER BY `sort` ASC [ RunTime:0.000862s ]
  27. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 53 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000791s ]
  28. SELECT * FROM `db_cms_product` WHERE ( `catid` = 53 ) ORDER BY `sort` ASC [ RunTime:0.001058s ]
  29. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 41 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.001154s ]
  30. SELECT * FROM `db_cms_product` WHERE ( `catid` = 41 ) ORDER BY `sort` ASC [ RunTime:0.000941s ]
  31. SELECT * FROM `db_cat` WHERE ( `pid` = 7 AND `status` = 1 ) ORDER BY `sort` ASC,`catid` ASC [ RunTime:0.000943s ]
  32. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 20 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000975s ]
  33. SELECT * FROM `db_cms_product` WHERE ( `catid` = 20 ) ORDER BY `sort` ASC [ RunTime:0.001208s ]
  34. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 51 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000630s ]
  35. SELECT * FROM `db_cms_product` WHERE ( `catid` = 51 ) ORDER BY `sort` ASC [ RunTime:0.000771s ]
  36. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 21 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000511s ]
  37. SELECT * FROM `db_cms_product` WHERE ( `catid` = 21 ) ORDER BY `sort` ASC [ RunTime:0.000603s ]
  38. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 22 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000632s ]
  39. SELECT * FROM `db_cms_product` WHERE ( `catid` = 22 ) ORDER BY `sort` ASC [ RunTime:0.001225s ]
  40. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 53 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.001270s ]
  41. SELECT * FROM `db_cms_product` WHERE ( `catid` = 53 ) ORDER BY `sort` ASC [ RunTime:0.000823s ]
  42. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 41 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.000786s ]
  43. SELECT * FROM `db_cms_product` WHERE ( `catid` = 41 ) ORDER BY `sort` ASC [ RunTime:0.002140s ]
  44. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 11 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.001733s ]
  45. SELECT * FROM `db_cms_news` WHERE ( `catid` = 11 ) ORDER BY `sort` ASC,`is_top` DESC,`is_good` DESC,`newstime` DESC LIMIT 5 [ RunTime:0.004881s ]
  46. SELECT * FROM `db_cat` WHERE ( `pid` = 7 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.001184s ]
  47. SELECT `catid`,`modelid` FROM `db_cat` WHERE ( `pid` = 41 AND `status` = 1 ) ORDER BY `sort` ASC [ RunTime:0.002206s ]
  48. SELECT * FROM `db_cms_product` WHERE ( `catid` = 41 ) ORDER BY `sort` ASC [ RunTime:0.001375s ]
0.188805s