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IF28.3!高分力作出炉!全新扩散 AI 工具实现单细胞转录组虚拟推演,国内研究者用六图拿下《Nature》子刊!

IF28.3!高分力作出炉!全新扩散 AI 工具实现单细胞转录组虚拟推演,国内研究者用六图拿下《Nature》子刊!

研究核心亮点

扩散模型预测转录

搭建 Squidiff 条件扩散模型,依靠隐空间插值精准还原细胞分化连续转录动态。

多扰动精准预测

仅用少量样本,就能预测基因、药物两类单细胞扰动,效果优于 scGen 等旧工具。

器官辐射模拟推演:

依托血管类器官单细胞数据,预测中子辐射及药物干预的细胞转录变化。

引言

单细胞技术解析细胞异质性,但各类刺激的高通量测序筛选耗力耗财,传统 VAE、图神经网络类预测模型难以捕捉平滑连续细胞过渡状态。

■本文开发 Squidiff 扩散框架,利用生成式 AI 模拟多种细胞刺激转录变化,在类器官辐射损伤场景完成落地验证,为虚拟药物筛选提供生信工具。

本文研究创新性较强,结构严谨。关注生信茧房!私信进行咨询吧!你的下一篇高分论文,说不定就从这里启航!

文献解读

研究背景

01

单细胞测序成本高、实验周期长,很难批量测细胞分化、药物、辐射等各类刺激下的转录谱。

现有单细胞预测模型难捕捉瞬时过渡细胞态,插值平滑度差,也无法适配全新药物分子。

本文构建扩散生成模型,仅靠有限测序数据,虚拟推演各类细胞刺激下的转录变化,降低实验成本。

研究方法

02

1

模型框架搭建

搭建带语义编码器的 DDIM 扩散模型,将转录数据映射至统一语义隐空间。

2

分化轨迹推演

输入首尾时序单细胞数据,隐空间插值补全中间分化阶段完整表达谱。

3

扰动预测分析

向量叠加模拟基因、药物扰动,嵌入分子指纹实现新药物响应预测。

4

器官数据验证

用人血管类器官单细胞数据集,验证辐射、药物干预预测可靠性。

研究结果

01

Squidiff通过去噪预测转录组变化

Squidiff 采用扩散模型搭配语义编码器,可把单细胞转录组映射到专属隐空间完成特征提取。

■该工具依靠隐空间向量运算插值推演,能批量预测基因干扰与药物处理带来的转录改变。

图1.Squidiff及其在合成数据上的表现概述。

02

Squidiff预测细胞分化

Squidiff 借助语义潜变量计算刺激向量,仅用两端时序数据就能推算分化中间转录图谱。

■模型只训练第 0、3 天 iPSC 单细胞数据,就能精准复原第 1、2 天细胞表达特征。

■通过隐空间向量递推运算,连续推演多阶段干细胞分化的完整基因表达变化。

图2.Squidiff预测细胞分化。

03

Squidiff预测基因和药物扰动

Squidiff 依靠语义潜变量向量叠加,模拟双基因协同扰动,不用基因互作图谱就能预测细胞转录改变。

■对比 GEARS、scGen 主流工具,该模型预测结果相关性更高,能精准还原非加性基因干扰的真实表达变化。

图3.Squidiff预测基因和药物扰动。

04

Squidiff预测血管类器官的分化

血管类器官异质性强,全程单细胞测序成本高,Squidiff 可弥补这类实验短板。

■仅用血管类器官首尾测序数据,模型就能推演全程细胞分化转录动态。

■该工具精准还原壁细胞向内皮转化的分化轨迹,和实测测序结果匹配。

图4.Squidiff预测血管类器官中的细胞分化过程。

05

中子辐照会破坏结构和新陈代谢

选用血管类器官构建辐射损伤模型,测序获取对照与辐照两组单细胞转录数据。

■Squidiff 把辐射刺激转化为隐空间向量,推算各类细胞受辐照后的表达谱。

■模型可精准复刻辐照引发的基因表达改变,与实测单细胞结果高度吻合。

图5.中子照射诱导的血管类器官结构损伤和代谢表型改变。

06

G-CSF可以减轻血管类器官中的辐射损伤

仅获取内皮细胞 G-CSF 处理测序数据,Squidiff 就能推算药物对其他血管细胞的转录影响。

■结合通路信息验证预测结果,模型推演的药物基因变化和实测单细胞数据匹配。

图6.G-CSF在防止血管类器官中辐射干扰方面的治疗潜力。

文章小结

本文搭建 Squidiff 扩散生信模型,依靠隐空间运算精准推演各类单细胞转录扰动变化。

该工具在干细胞、肿瘤、血管类器官多套单细胞数据集上验证,预测效果优于传统工具。

模型可虚拟筛选药物并解析辐射损伤通路,但训练算力需求高,仍有优化空间。

如果你想冲击高分,需要生信分析,那就来后台滴滴我们生信茧房,专业 SCI 生信分析服务等你来!助力你高效推进研究,解锁顶刊密码~

声明:本次分享的内容,都是我日常做生信分析积累的思路和实操经验,仅供圈内伙伴交流复盘。个人理解难免存在疏漏和偏差,并非标准权威解读,欢迎各位同行多多指正,我们一起互相学习、共同提升。

往期回顾

1

IF9.7!恭喜中山一院广西医院陈莹莹博士团队用六图十表成功拿下 BMC 正刊!

2

IF14.10!恭喜浙江大学附属二院李雪教授团队用三图四表成功拿下双一区 TOP 顶刊!

3

IF15.6!恭喜厦门大学附属翔安医院彭志海教授团队用七图七表成功拿下双一区TOP顶刊!

4

IF15.6!恭喜厦门大学附属翔安医院彭志海教授团队用七图七表成功拿下双一区TOP顶刊!

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  1. CONNECT:[ UseTime:0.000575s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000963s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000385s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000261s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000516s ]
  6. SELECT * FROM `set` [ RunTime:0.000221s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000609s ]
  8. SELECT * FROM `article` WHERE `id` = 925796 LIMIT 1 [ RunTime:0.000517s ]
  9. UPDATE `article` SET `lasttime` = 1786533410 WHERE `id` = 925796 [ RunTime:0.019511s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.002811s ]
  11. SELECT * FROM `article` WHERE `id` < 925796 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000513s ]
  12. SELECT * FROM `article` WHERE `id` > 925796 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000369s ]
  13. SELECT * FROM `article` WHERE `id` < 925796 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000773s ]
  14. SELECT * FROM `article` WHERE `id` < 925796 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000884s ]
  15. SELECT * FROM `article` WHERE `id` < 925796 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000723s ]
0.150661s