CDB25:0003188 C1QA — CD44

Experimentally validated in Human; Orthology-inferred in Mouse, Rat, Frog, Zebrafish, Chicken, Macaque, Pig, Dog, Cow, Chimp, Horse, Marmoset, Sheep

Title

Journal:; Year Published:

Abstract

Novel C1q receptor-mediated signaling controls neural stem cell behavior and neurorepair.

eLife, 2020; PubMed, Homo sapiens C1QA — Homo sapiens CD44

ABSTRACT: C1q plays a key role as a recognition molecule in the immune system, driving autocatalytic complement cascade activation and acting as an opsonin. We have previously reported a non-immune role of complement C1q modulating the migration and fate of human neural stem cells (hNSC); however, the mechanism underlying these effects has not yet been identified. Here, we show for the first time that C1q acts as a functional hNSC ligand, inducing intracellular signaling to control cell behavior. Using an unbiased screening strategy, we identified five transmembrane C1q signaling/receptor candidates in hNSC (CD44, GPR62, BAI1, c-MET, and ADCY5). We further investigated the interaction between C1q and CD44 , demonstrating that CD44 mediates C1q induced hNSC signaling and chemotaxis in vitro, and hNSC migration and functional repair in vivo after spinal cord injury. These results reveal a receptor-mediated mechanism for C1q modulation of NSC behavior and show that modification of C1q receptor expression can expand the therapeutic window for hNSC transplantation.

Basic Information on C1QA

Ligand Name: complement C1q A chain

Other Symbols: N/A

Ligand Location: secreted based on perplexity, uniprot

HGNC Gene Symbol Report: C1QA

GeneCards: C1QA

HGNC Gene Group: C1q domain containing, Complement system

Functional Annotations for C1QA

Gene Ontologies: PAN-GO, AmiGO 2

Expression Profile: Human Protein Atlas (RNA and protein), Human Cell Atlas (RNA), GEPIA cancer vs normal (RNA), GeneCards (RNA and protein)

Disease Annotations: MalaCards, OMIM, Open Targets Platform, DISEASES (text mining), AI summary (LLM)

Interactions with other Receptors for C1QA

C1QA — CD93 ・ C1QA — CR1 ・ C1QA — CD33 ・ C1QA — ADCY5 ・ C1QA — ADGRB1 ・ C1QA — DDR1 ・ C1QA — GPR62 ・ C1QA — LAIR1 ・ C1QA — LRP1 ・ C1QA — MET

Basic Information on CD44

Receptor Name: CD44 molecule (IN blood group)

Other Symbols: MIC4, MDU2, MDU3, IN, MC56, Pgp1, PGP-1, CD44R, HCELL, CSPG8, Hermes-1, CDw44, HUTCH-1, HUTCH-I, ECM-III, H-CAM

Receptor Location: cell membrane based on hpa, perplexity, uniprot

HGNC Gene Symbol Report: CD44

GeneCards: CD44

HGNC Gene Group: Blood group antigens, CD molecules, Proteoglycans

Functional Annotations for CD44

Gene Ontologies: PAN-GO, AmiGO 2

Expression Profile: Human Protein Atlas (RNA and protein), Human Cell Atlas (RNA), GEPIA cancer vs normal (RNA), GeneCards (RNA and protein)

Disease Annotations: MalaCards, OMIM, Open Targets Platform, DISEASES (text mining), AI summary (LLM)

Interactions with other Ligands for CD44

COL14A1 — CD44 ・ COL1A1 — CD44 ・ COL1A2 — CD44 ・ FGF1 — CD44 ・ FGF2 — CD44 ・ FN1 — CD44 ・ HBEGF — CD44 ・ HGF — CD44 ・ MADCAM1 — CD44 ・ MMP7 — CD44 ・ MMP9 — CD44 ・ SPP1 — CD44 ・ VCAN — CD44 ・ VIM — CD44 ・ LGALS9 — CD44 ・ SELE — CD44 ・ BGN — CD44 ・ C1QB — CD44 ・ C1QC — CD44 ・ CD6 — CD44 ・ DMP1 — CD44 ・ GPNMB — CD44 ・ LAMA5 — CD44 ・ PRG4 — CD44 ・ SIGLEC15 — CD44 ・ VEGFA — CD44