6533b7d8fe1ef96bd126b762
RESEARCH PRODUCT
C1q acts in the tumour microenvironment as a cancer-promoting factor independently of complement activation
Damiano RamiRoberta BullaClaudio TripodoMarina BottoCarla GuarnottaGuang Sheng LingPaolo DuriguttoSonia ZorzetChiara AgostinisFrancesco Tedescosubject
Genetics and Molecular Biology (all)0301 basic medicinePROTEINGeneral Physics and AstronomyMELANOMAApoptosisInbred C57BLBiochemistryDISEASEAnimals; Apoptosis; Cell Line Tumor; Cell Movement; Cell Proliferation; Complement Activation; Complement C1q; Complement C3; Complement C5; Humans; Mice; Mice Inbred C57BL; Mice Knockout; Neoplasms; Biochemistry Genetics and Molecular Biology (all); Chemistry (all); Physics and Astronomy (all)Micefluids and secretionsCell Movementimmune system diseasesNeoplasmsIMMUNE-RESPONSEskin and connective tissue diseasesComplement ActivationComplement C1qMice KnockoutComplement component 5TumorMultidisciplinaryQChemistry (all)Complement C5Complement C33. Good healthCell biologyMultidisciplinary SciencesDEFICIENCYmedicine.anatomical_structureScience & Technology - Other TopicsHumanKnockoutSciencechemical and pharmacologic phenomenaBiologyArticleGeneral Biochemistry Genetics and Molecular BiologyTROPHOBLAST INVASIONMECHANISMSCell LinePhysics and Astronomy (all)03 medical and health sciencesClassical complement pathwayImmune systemINFLAMMATIONCell Line TumormedicineAnimalsHumansCell ProliferationScience & TechnologyBiochemistry Genetics and Molecular Biology (all)AnimalCell growthEFFECTOR SYSTEMComplement C1qApoptosiGeneral ChemistryComplement systemMice Inbred C57BL030104 developmental biologyCancer cellNeoplasmBone marrowANTIBODY THERAPYdescription
Complement C1q is the activator of the classical pathway. However, it is now recognized that C1q can exert functions unrelated to complement activation. Here we show that C1q, but not C4, is expressed in the stroma and vascular endothelium of several human malignant tumours. Compared with wild-type (WT) or C3- or C5-deficient mice, C1q-deficient (C1qa−/−) mice bearing a syngeneic B16 melanoma exhibit a slower tumour growth and prolonged survival. This effect is not attributable to differences in the tumour-infiltrating immune cells. Tumours developing in WT mice display early deposition of C1q, higher vascular density and an increase in the number of lung metastases compared with C1qa−/− mice. Bone marrow (BM) chimeras between C1qa−/− and WT mice identify non-BM-derived cells as the main local source of C1q that can promote cancer cell adhesion, migration and proliferation. Together these findings support a role for locally synthesized C1q in promoting tumour growth.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-10-07 | Nature Communications |