Abstract 5483: Revealing dynamic temporal trajectories and underlying regulatory networks with Cflows.

Abstract While single-cell technologies provide snapshots of tumor states, building continuous trajectories and uncovering causative gene regulatory networks remains a significant challenge. We present Cflows, an AI framework that combines neural ODE networks with Granger causality to infer continuous cell state transitions and gene regulatory interactions from static scRNA-seq data. In a new 5-time point dataset capturing tumorsphere development over 30 days, Cflows reconstructs two types of trajectories leading to tumorsphere formation or apoptosis. Trajectory-based cell-of-origin analysis delineated a novel cancer stem cell profile characterized by CD44hiEPCAM+CAV1+, and uncovered a cell cycle-dependent enrichment of tumorsphere-initiating potential in G2/M or S-phase cells. Cflows uncovers ESRRA as a crucial causal driver of the tumor-forming gene regulatory network. Indeed, ESRRA inhibition significantly reduces tumor growth and metastasis in vivo. Cflows offers a powerful framework for uncovering cellular transitions and dynamic regulatory networks from static single-cell data. Citation Format: Shabarni Gupta, Xingzhi Sun, Alexander Tong, Manik Kuchroo, Dhananjay Bhaskar, Chen Liu, Aarthi Venkat, Beatriz P. San Juan, Laura Rangel, Vanina Rodriguez, John G. Lock, Christine Louise Chaffer, Smita Krishnaswamy. Revealing dynamic temporal trajectories and underlying regulatory networks with Cflows [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2026; Part 1 (Regular Abstracts); 2026 Apr 17-22; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2026;86(7 Suppl):Abstract nr 5483.