A recent investigation uncovers how precancerous pancreatic cells form structured clusters and interact with immune cells to potentially suppress defenses at the disease's outset. Pancreatic ductal adenocarcinoma ranks among the deadliest cancers due to late diagnosis and scarce treatment choices. Precancerous lesions may persist for a decade or longer before progressing to invasive cancer, yet the spatial arrangement of these early changes and their effects on nearby tissue remain poorly understood.
Led by Oren Parnas from the Hebrew University of Jerusalem's Faculty of Medicine, the team applied single-cell RNA sequencing alongside spatial transcriptomics to pancreatic tissue samples. These methods preserved the positions of thousands of cells, enabling maps of acinar metaplastic cell distributions within premalignant lesions and their contacts with surrounding immune cells. The analysis revealed that early altered cells avoid random scattering, instead grouping into semi-homogeneous niches based on shared identities.
“Our findings show that these early altered cells are not randomly distributed,” said Dr. Parnas. “Instead, cells with similar identities tend to cluster together, forming semi-homogeneous niches that appear to actively interact with specific immune cell populations.”
Particular metaplastic cell types positioned themselves near immune-suppressing neutrophils and macrophages, accompanied by gene patterns that reduce immune responses. Such proximity hints at immune evasion mechanisms activating far ahead of invasive growth.
Using advanced molecular tools on pancreas tissue sections confirmed these immune-dampening signals emerge very early, suggesting cancer prepares to hide from detection sooner than once thought. The team also spotted matching cell patterns and immune ties in human pancreatic samples, extending the observations past animal models.
According to Sebastian Arcila-Barrera, first author of the paper published in Gastroenterology, “The spatial patterns we observed suggest that cell identity is established early, followed by localized expansion. This helps clarify how premalignant lesions develop and evolve over time.”
Co-author Sharona Tornovsky-Babeay added that, “Understanding the process of lesion formation and development, we may be able to better identify high-risk lesions and, in the future, design strategies that intervene before cancer fully develops.”
Publication details: Arcila-Barrera, Sebastian et al. Acinar Metaplastic Cells Generate Semi-Homogeneous Niches and Interact With Immune Cells. Gastroenterology
Led by Oren Parnas from the Hebrew University of Jerusalem's Faculty of Medicine, the team applied single-cell RNA sequencing alongside spatial transcriptomics to pancreatic tissue samples. These methods preserved the positions of thousands of cells, enabling maps of acinar metaplastic cell distributions within premalignant lesions and their contacts with surrounding immune cells. The analysis revealed that early altered cells avoid random scattering, instead grouping into semi-homogeneous niches based on shared identities.
“Our findings show that these early altered cells are not randomly distributed,” said Dr. Parnas. “Instead, cells with similar identities tend to cluster together, forming semi-homogeneous niches that appear to actively interact with specific immune cell populations.”
Particular metaplastic cell types positioned themselves near immune-suppressing neutrophils and macrophages, accompanied by gene patterns that reduce immune responses. Such proximity hints at immune evasion mechanisms activating far ahead of invasive growth.
Using advanced molecular tools on pancreas tissue sections confirmed these immune-dampening signals emerge very early, suggesting cancer prepares to hide from detection sooner than once thought. The team also spotted matching cell patterns and immune ties in human pancreatic samples, extending the observations past animal models.
According to Sebastian Arcila-Barrera, first author of the paper published in Gastroenterology, “The spatial patterns we observed suggest that cell identity is established early, followed by localized expansion. This helps clarify how premalignant lesions develop and evolve over time.”
Co-author Sharona Tornovsky-Babeay added that, “Understanding the process of lesion formation and development, we may be able to better identify high-risk lesions and, in the future, design strategies that intervene before cancer fully develops.”
Publication details: Arcila-Barrera, Sebastian et al. Acinar Metaplastic Cells Generate Semi-Homogeneous Niches and Interact With Immune Cells. Gastroenterology