Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interaction
Abstract Background Myeloma cells retain B cell functions, considered to be potential antigen presenting cells, yet there is little information regarding promoting Th2 cell proliferation or the direct effects to myeloma on the Th2 cells stimulated by microbial antigens-loaded myeloma cells. Methods...
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BMC
2019-12-01
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| Series: | BMC Cancer |
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| Online Access: | https://doi.org/10.1186/s12885-019-6469-4 |
| _version_ | 1818724197618155520 |
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| author | Faqing Tian Bo Lu Ziren Chen Junru Liu Delan Ji Juheng Li Meiqin Tang Wei Zhu Juan Li |
| author_facet | Faqing Tian Bo Lu Ziren Chen Junru Liu Delan Ji Juheng Li Meiqin Tang Wei Zhu Juan Li |
| author_sort | Faqing Tian |
| collection | DOAJ |
| description | Abstract Background Myeloma cells retain B cell functions, considered to be potential antigen presenting cells, yet there is little information regarding promoting Th2 cell proliferation or the direct effects to myeloma on the Th2 cells stimulated by microbial antigens-loaded myeloma cells. Methods Mixed lymphocyte reaction was used colorimetric assays via CCK8-kit. Surface molecular expression was performed by flow cytometry, cells sorting using microbeads. The concentrations of cytokines in serum were assessed using an ELISA kit. Clonogenic assay were performed in a methylcellulose culture system. Statistical analysis was assessed using the Student’s t-test or one-way analysis of variance for multiple comparisons test. Results The expression of HLA-DR, CD80 and CD40 on RPMI8266 cell membrane surface was upregulated by interaction with interferon-γ and/or Bacillus Calmette-Guerin Vaccine (BCGV). RPMI8266 cells were able to induce the mixed lymphocyte reaction in a dose-dependent fashion. The Th2 ratio induced by RPMI8266 treated by BCGV and interferon-γ (treated-RPMI8266) cells was only slightly greater than by untreated-tumor cells, but the serum IL-4 level secreted by Th2 cells was markedly higher in treated-RPMI8266 cells group. Th2 cells stimulated by treated-myeloma cells could directly promote treated-myeloma cell clonogenicity in a dose-dependent manner. Anti-HLADR IgG2b completely blocked increased of IL-4 secretion by Th2 cells stimulated by treated-myeloma cells, while also blocked enhancing the clonogenicity of treated tumor cells stimulated by MM-Th2 cells. Conclusions These results indicate that a novel mechanism of myeloma pathogenesis in myeloma cells could act as an APC to present microbial Ags to Th2 cells, promoting Th2 cell proliferation, consequently facilitating tumor development by close interaction between Th2 myeloma cells. Taken together, the microbial Ag presenting course of MM-Th2-MM interactions—restricted by MHC class-II—may result in tumor development such that all factors involved in the system could have a potential for myeloma therapeutic intervention. |
| first_indexed | 2024-12-17T21:22:35Z |
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| id | doaj.art-6becd4091f1e41289c1e55126dde729b |
| institution | Directory Open Access Journal |
| issn | 1471-2407 |
| language | English |
| last_indexed | 2024-12-17T21:22:35Z |
| publishDate | 2019-12-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Cancer |
| spelling | doaj.art-6becd4091f1e41289c1e55126dde729b2022-12-21T21:32:08ZengBMCBMC Cancer1471-24072019-12-011911910.1186/s12885-019-6469-4Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interactionFaqing Tian0Bo Lu1Ziren Chen2Junru Liu3Delan Ji4Juheng Li5Meiqin Tang6Wei Zhu7Juan Li8Department of Hematology, Longgang District People’s Hospital of ShenzhenDepartment of Hematology, The Seventh Affiliated Hospital, Sun Yat-Sen UniversityDepartment of Hematological Oncology, Shenzhen University General HospitalDepartment of Hematology, The First Affiliated Hospital, Sun Yat-Sen UniversityDepartment of Hematology, Longgang District People’s Hospital of ShenzhenDepartment of Hematology, Longgang District People’s Hospital of ShenzhenDepartment of Hematology, Longgang District People’s Hospital of ShenzhenDepartment of Pathology, School of Basic Medicine, Guangdong Medical UniversityDepartment of Hematology, The First Affiliated Hospital, Sun Yat-Sen UniversityAbstract Background Myeloma cells retain B cell functions, considered to be potential antigen presenting cells, yet there is little information regarding promoting Th2 cell proliferation or the direct effects to myeloma on the Th2 cells stimulated by microbial antigens-loaded myeloma cells. Methods Mixed lymphocyte reaction was used colorimetric assays via CCK8-kit. Surface molecular expression was performed by flow cytometry, cells sorting using microbeads. The concentrations of cytokines in serum were assessed using an ELISA kit. Clonogenic assay were performed in a methylcellulose culture system. Statistical analysis was assessed using the Student’s t-test or one-way analysis of variance for multiple comparisons test. Results The expression of HLA-DR, CD80 and CD40 on RPMI8266 cell membrane surface was upregulated by interaction with interferon-γ and/or Bacillus Calmette-Guerin Vaccine (BCGV). RPMI8266 cells were able to induce the mixed lymphocyte reaction in a dose-dependent fashion. The Th2 ratio induced by RPMI8266 treated by BCGV and interferon-γ (treated-RPMI8266) cells was only slightly greater than by untreated-tumor cells, but the serum IL-4 level secreted by Th2 cells was markedly higher in treated-RPMI8266 cells group. Th2 cells stimulated by treated-myeloma cells could directly promote treated-myeloma cell clonogenicity in a dose-dependent manner. Anti-HLADR IgG2b completely blocked increased of IL-4 secretion by Th2 cells stimulated by treated-myeloma cells, while also blocked enhancing the clonogenicity of treated tumor cells stimulated by MM-Th2 cells. Conclusions These results indicate that a novel mechanism of myeloma pathogenesis in myeloma cells could act as an APC to present microbial Ags to Th2 cells, promoting Th2 cell proliferation, consequently facilitating tumor development by close interaction between Th2 myeloma cells. Taken together, the microbial Ag presenting course of MM-Th2-MM interactions—restricted by MHC class-II—may result in tumor development such that all factors involved in the system could have a potential for myeloma therapeutic intervention.https://doi.org/10.1186/s12885-019-6469-4MyelomaMicrobial antigenAntigen presenting cellsTh2 cellClonogenicityMHC- II restriction |
| spellingShingle | Faqing Tian Bo Lu Ziren Chen Junru Liu Delan Ji Juheng Li Meiqin Tang Wei Zhu Juan Li Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interaction BMC Cancer Myeloma Microbial antigen Antigen presenting cells Th2 cell Clonogenicity MHC- II restriction |
| title | Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interaction |
| title_full | Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interaction |
| title_fullStr | Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interaction |
| title_full_unstemmed | Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interaction |
| title_short | Microbial antigens-loaded myeloma cells enhance Th2 cell proliferation and myeloma clonogenicity via Th2–myeloma cell interaction |
| title_sort | microbial antigens loaded myeloma cells enhance th2 cell proliferation and myeloma clonogenicity via th2 myeloma cell interaction |
| topic | Myeloma Microbial antigen Antigen presenting cells Th2 cell Clonogenicity MHC- II restriction |
| url | https://doi.org/10.1186/s12885-019-6469-4 |
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