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Updated: Oct 2, 2026

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Cell surface phenotype and cytokine secretion in Caco-2 cell cultures: increased RANTES production and IL-2
C Rodriguez-Juan1, M Pérez-Blas, A P Valeri
1Inmunologia, Fac Medicina, Universidad Complutense de Madrid, Spain.
Abstract:
Caco-2 is a colonic tumour cell line which, when cultured, spontaneously exhibits enterocyte-like characteristics. Given the difficulties in maintaining long-lasting cultures of enterocytes, this cell line may be a suitable in vitro model to carry out experiments trying to delineate the involvement of enterocytes in local immune responses, and their role in pathology. It seems then reasonable to obtain a detailed immune analysis of Caco-2, and compare it with available data on enterocytes. Cytofluorometry revealed several leukocyte markers on Caco-2, present also on human enterocytes. These markers include surface proteases (CD10, CD13 and CD26), antigen-presenting cell markers (CD13, CD14, CD35 and CD63), integrins (CD18 and CD61), epithelial/endothelial markers (CD21, CD31, CD47 and CD59) and finally, CD25 and CD28. In contrast to enterocytes, HLA-class 11 molecules are not found on Caco-2, whether resting or gamma-IFN-stimulated. Moreover, culture experiments with allogeneic lymphocytes revealed that Caco-2 cells were unable to induce their proliferation. Cytokine analysis showed an increased RANTES synthesis and IL-2 transcription upon stimulation with IL-1beta. Finally, amongst RANTES receptors, CCR1 is found on Caco-2 cells, whereas CCR3 and CCR5 are not.
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