Publications

2024

• Structure-preserved integration of scRNA-seq data using heterogeneous graph neural network
  Xun Zhang*, Kun Qian*, Hongwei Li
  Briefings in Bioinformatics, 2024

  By establishing a heterogeneous graph that represents the interactions between multiple batches of cells and genes, and combining a heterogeneous graph neural network with contrastive learning, we proposed a structure-preserved scRNA-seq data integration approach scHetG.

• SpaHDmap: Interpretable high-resolution dimension reduction of spatial transcriptomics data
  Junjie Tang*, Zihao Chen*, Kun Qian*, Siyuan Huang, Yang He, Shenyi Yin, Xinyu He, Buqing Ye, Yan Zhuang, Hongxue Meng, Jianzhong Jeff Xi, Ruibin Xi
  bioRxiv, 2024

  We introduce SpaHDmap, an interpretable dimension reduction framework that enhances spatial resolution by integrating ST gene expression with high-resolution histology images. SpaHDmap incorporates non-negative matrix factorization into a multimodal fusion encoder-decoder architecture, enabling the identification of interpretable, high-resolution embeddings.

2023

• scAce: an adaptive embedding and clustering method for single-cell gene expression data
  Xinwei He*, Kun Qian*, Ziqian Wang, Shirou Zeng, Hongwei Li, Wei Vivian Li
  Bioinformatics, 2023

  We propose an adaptive embedding and clustering method named scAce, which constructs a variational autoencoder to simultaneously learn cell embeddings and cluster assignments. In the scAce method, we develop an adaptive cluster merging approach which achieves improved clustering results without the need to estimate the number of clusters in advance.

• Integration of scRNA-seq data by disentangled representation learning with condition domain adaptation
  Renjing Liu*, Kun Qian*, Xinwei He, Hongwei Li
  BMC Bioinformatics, 2023

  To expedite the exploration of systematic disparities under various biological contexts, we propose a scRNA-seq integration method called scDisco, which involves a domain-adaptive decoupling representation learning strategy for the integration of dissimilar scRNA-seq data.

• scBiG for representation learning of single-cell gene expression data based on bipartite graph embedding
  Ting Li*, Kun Qian*, Xiang Wang, Wei Vivian Li, Hongwei Li
  NAR Genomics and Bioinformatics, 2023

  We introduce scBiG, a novel graph node embedding method designed for representation learning in scRNA-seq data. scBiG establishes a bipartite graph connecting cells and expressed genes, and then constructs a multilayer graph convolutional network to learn cell and gene embeddings.

2022

• scINSIGHT for interpreting single-cell gene expression from biologically heterogeneous data
  Kun Qian*, Shiwei Fu, Hongwei Li, Wei Vivian Li*
  Genome Biology, 2022

  Although different batch effect removal methods have been developed, none are suitable for heterogeneous single-cell samples coming from multiple biological conditions. We propose a method, scINSIGHT, to learn coordinated gene expression patterns that are common among, or specific to, different biological conditions, and identify cellular identities and processes across single-cell samples.

* Equal contribution