This study aimed to elucidate the role of collagen type XI alpha 1(COL11A1)-positive cancer-associated fibroblasts(CAFs)in modifying the tumor microenvironment of colon cancer(CC)and facilitating immune evasion throug...This study aimed to elucidate the role of collagen type XI alpha 1(COL11A1)-positive cancer-associated fibroblasts(CAFs)in modifying the tumor microenvironment of colon cancer(CC)and facilitating immune evasion through interactions with myeloid-derived suppressor cells(MDSCs).Using single-cell transcriptomic sequencing,we analyzed the interplay between COL11A1-positive CAFs and MDSCs in the CC microenvironment,focusing on how COL11A1 impacts MDSC differentiation and activation.The results demonstrate that COL11A1 expression in fibroblasts significantly enhances matrix metalloproteinase(MMP)3 and MMP13 expression,leading to paracrine induction of MDSC differentiation and activation,which promotes immune evasion and tumor growth.Additionally,we observed that COL11A1 knockout(COL11A1KO)suppresses tumor growth and hinders immune evasion.These findings underscore the essential role of COL11A1-positive CAFs in establishing an immunosuppressive tumor microenvironment conducive to CC progression.By elucidating the molecular pathway through which COL11A1 influences MDSC activity,this research suggests new therapeutic avenues for targeting the tumor microenvironment in CC,particularly through modulating COL11A1 expression in CAFs.展开更多
Dermatofibrosarcoma protuberans(DFSP)is a rare cutaneous intermediate-grade soft tissue tumor characterized by COL1A1::PDGFB fusion in most cases.This fusion drives tumorigenesis and forms the basis for imatinib treat...Dermatofibrosarcoma protuberans(DFSP)is a rare cutaneous intermediate-grade soft tissue tumor characterized by COL1A1::PDGFB fusion in most cases.This fusion drives tumorigenesis and forms the basis for imatinib treatment,which acts by blocking platelet-derived growth factor receptor-beta kinase activity.Apart from this canonical fusion,there is an expanding spectrum of rare fusions,including COL6A3::PDGFD,EMILIN::PDGFD,TNC::PDGFD,etc.,through mole-cular profiling.These atypical rearrangements may be encountered in morpho-logically classic DFSP,unusual anatomic sites,or diagnostically challenging variants such as fibrosarcomatous DFSP.Their recognition is clinically relevant,as they may influence tumor biology,response to targeted therapy,and eligibility for clinical trials.This newly documented DFSP involving the lacrimal sac was initially misdiagnosed as a solitary fibrous tumor,emphasizing the diagnostic pitfalls in anatomically constrained regions and the importance of integrated diagnosis combining histology,immunohistochemistry,and molecular testing.In this editorial commentary,we briefly highlight the ever-growing genomic land-scape of DFSP,report rare fusions and their biological implications,and examine the role of expanded molecular diagnostics in refining diagnosis,guiding therapy,and informing prognosis.Incorporating comprehensive fusion analysis into routine workup may be critical for accurate classification,especially in unusual presentations where reliance on morphology alone risks misdiagnosis.展开更多
文摘This study aimed to elucidate the role of collagen type XI alpha 1(COL11A1)-positive cancer-associated fibroblasts(CAFs)in modifying the tumor microenvironment of colon cancer(CC)and facilitating immune evasion through interactions with myeloid-derived suppressor cells(MDSCs).Using single-cell transcriptomic sequencing,we analyzed the interplay between COL11A1-positive CAFs and MDSCs in the CC microenvironment,focusing on how COL11A1 impacts MDSC differentiation and activation.The results demonstrate that COL11A1 expression in fibroblasts significantly enhances matrix metalloproteinase(MMP)3 and MMP13 expression,leading to paracrine induction of MDSC differentiation and activation,which promotes immune evasion and tumor growth.Additionally,we observed that COL11A1 knockout(COL11A1KO)suppresses tumor growth and hinders immune evasion.These findings underscore the essential role of COL11A1-positive CAFs in establishing an immunosuppressive tumor microenvironment conducive to CC progression.By elucidating the molecular pathway through which COL11A1 influences MDSC activity,this research suggests new therapeutic avenues for targeting the tumor microenvironment in CC,particularly through modulating COL11A1 expression in CAFs.
文摘Dermatofibrosarcoma protuberans(DFSP)is a rare cutaneous intermediate-grade soft tissue tumor characterized by COL1A1::PDGFB fusion in most cases.This fusion drives tumorigenesis and forms the basis for imatinib treatment,which acts by blocking platelet-derived growth factor receptor-beta kinase activity.Apart from this canonical fusion,there is an expanding spectrum of rare fusions,including COL6A3::PDGFD,EMILIN::PDGFD,TNC::PDGFD,etc.,through mole-cular profiling.These atypical rearrangements may be encountered in morpho-logically classic DFSP,unusual anatomic sites,or diagnostically challenging variants such as fibrosarcomatous DFSP.Their recognition is clinically relevant,as they may influence tumor biology,response to targeted therapy,and eligibility for clinical trials.This newly documented DFSP involving the lacrimal sac was initially misdiagnosed as a solitary fibrous tumor,emphasizing the diagnostic pitfalls in anatomically constrained regions and the importance of integrated diagnosis combining histology,immunohistochemistry,and molecular testing.In this editorial commentary,we briefly highlight the ever-growing genomic land-scape of DFSP,report rare fusions and their biological implications,and examine the role of expanded molecular diagnostics in refining diagnosis,guiding therapy,and informing prognosis.Incorporating comprehensive fusion analysis into routine workup may be critical for accurate classification,especially in unusual presentations where reliance on morphology alone risks misdiagnosis.
