Tag

Tumor Heterogeneity

All articles tagged with #tumor heterogeneity

Single-cell mapping reveals how MYC drives immune evasion in pancreatic cancer
science7 days ago

Single-cell mapping reveals how MYC drives immune evasion in pancreatic cancer

A large-scale study published in Nature Genetics maps the clonal and spatial heterogeneity of pancreatic ductal adenocarcinoma (PDAC) using single-cell RNA sequencing and spatial transcriptomics. The research identifies a critical link between MYC gene amplification and the shift from classical to basal tumor subtypes, a transition that suppresses immune responses. By analyzing 62 primary tumors and 11 matched spatial samples, the study demonstrates that specific genetic changes drive transcriptional plasticity and metastatic potential, offering new targets for therapeutic intervention.

Rapid autopsy study reveals lethal bladder cancer subtypes evolve via metastasis-to-mastasis seeding
health1 month ago

Rapid autopsy study reveals lethal bladder cancer subtypes evolve via metastasis-to-mastasis seeding

A large study using rapid autopsies of terminal bladder cancer patients reveals that metastatic spread is primarily driven by one metastasis seeding others, rather than the primary tumor. Plasmacytoid and neuroendocrine subtypes exhibit early aggressive genomic changes and shorter survival. Plasmacytoid tumors uniquely utilize the Fanconi anemia pathway to resist cisplatin, while polyclonal migration correlates with poor prognosis. Post-mortem cell-free DNA may enable non-invasive subtype identification.

Developmental cell states drive heterogeneity in supratentorial ependymomas
science7 months ago

Developmental cell states drive heterogeneity in supratentorial ependymomas

A multidimensional study integrating single-cell and spatial transcriptomics with live-cell imaging reveals two progenitor-like states—neuroepithelial-like and embryonic-like—and diverse spatial architectures in supratentorial ependymomas. Brain-resident cells can shift tumor cells toward neuronal-like, migratory phenotypes, highlighting developmental origins of heterogeneity and suggesting potential therapeutic angles.

The Impact of Tumor Heterogeneity on Immunogenicity in Mismatch Repair Deficient Tumors
cancer-immunotherapy3 years ago

The Impact of Tumor Heterogeneity on Immunogenicity in Mismatch Repair Deficient Tumors

Tumor heterogeneity can impair immunogenicity in mismatch repair deficient (MMRd) tumors, potentially leading to immunotherapy failure. While high tumor mutational burden (TMB) is associated with exceptional immunotherapy responses, some MMRd patients do not experience clinical benefit. Recent research suggests that high intra-tumoral heterogeneity can offset immunogenicity in sporadic MMRd tumors, highlighting the need for further investigation into the mechanisms underlying immunotherapy resistance.