Unknown

Dataset Information

0

Evidence for a Mesothelial Origin of Body Cavity Effusion Lymphomas.


ABSTRACT: Primary effusion lymphoma (PEL) is a Kaposi's sarcoma herpes virus (KSHV)-induced lymphoma that typically arises in body cavities of HIV-infected patients. PEL cells are often co-infected with Epstein-Barr virus (EBV). "PEL-like" lymphoma is a KSHV-unrelated lymphoma that arises in body cavities of HIV-negative patients. "PEL-like" lymphoma is sometimes EBV positive. The derivation of PEL/"PEL-like" cells is unclear.Mesothelial cells were cultured from body cavity effusions of 23 patients. Cell proliferation, cytokine secretion, marker phenotypes, KSHV/EBV infection, and clonality were evaluated by standard methods. Gene expression was measured by quantitative polymerase chain reaction and immunoblotting. A mouse model of PEL (3 mice/group) was used to evaluate tumorigenicity.We found that the mesothelia derived from six effusions of HIV-infected patients with PEL or other KSHV-associated diseases contained rare KSHV + or EBV + mesothelial cells. After extended culture (16-17 weeks), some mesothelial cells underwent a trans-differentiation process, generating lymphoid-type CD45 + /B220 + , CD5 + , CD27 + , CD43 + , CD11c + , and CD3 - cells resembling "B1-cells," most commonly found in mouse body cavities. These "B1-like" cells were short lived. However, long-term KSHV + EBV - and EBV + KSHV - clonal cell lines emerged from mesothelial cultures from two patients that were clonally distinct from the monoclonal or polyclonal B-cell populations found in the patients' original effusions.Mesothelial-to-lymphoid transformation is a newly identified in vitro process that generates "B1-like" cells and is associated with the emergence of long-lived KSHV or EBV-infected cell lines in KSHV-infected patients. These results identify mesothelial cultures as a source of PEL cells and lymphoid cells in humans.

SUBMITTER: Sanchez-Martin D 

PROVIDER: S-EPMC6059237 | BioStudies | 2017-01-01T00:00:00Z

REPOSITORIES: biostudies

Similar Datasets

1000-01-01 | S-EPMC3184084 | BioStudies
2018-01-01 | S-EPMC6275488 | BioStudies
1000-01-01 | S-EPMC3067939 | BioStudies
2014-01-01 | S-EPMC3930384 | BioStudies
1000-01-01 | S-EPMC5339436 | BioStudies
| GSE121934 | GEO
1000-01-01 | S-EPMC1900272 | BioStudies
2015-01-01 | S-EPMC4473585 | BioStudies
2016-01-01 | S-EPMC4988020 | BioStudies
1000-01-01 | S-EPMC5928232 | BioStudies