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Nagaev, Ivan
Publications (10 of 14) Show all publications
Israelsson, P., Björk, E., Nagaev, I., Nagaeva, O., Lundin, E., Mincheva-Nilsson, L. & Ottander, U. (2023). NKG2D-mediated cytotoxicity improves after primary surgery for high-grade serous ovarian cancer. American Journal of Reproductive Immunology, 89(1), Article ID e13647.
Open this publication in new window or tab >>NKG2D-mediated cytotoxicity improves after primary surgery for high-grade serous ovarian cancer
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2023 (English)In: American Journal of Reproductive Immunology, ISSN 1046-7408, E-ISSN 1600-0897, Vol. 89, no 1, article id e13647Article in journal (Refereed) Published
Abstract [en]

Problem: Tumors compromise the patients’ immune system to promote their own survival. We have previously reported that HGSC exosomes play a central role, downregulating NKG2D cytotoxicity. Primary surgery's effect on tumor exosomes and NKG2D cytotoxicity in HGSC patients has not been studied before. The overall objective of this study was to explore the effect of surgery on the exosome-induced impairment of NKG2D cytotoxicity in HGSC.

Method of study: Paired pre- and post-operative blood samples were subjected to cell and exosome analyses regarding the NKG2D receptor and ligands, and NKG2D-mediated cytotoxicity. Lymphocytes were phenotyped by immunoflow cytometry. Exosomes, isolated by ultracentrifugation, and characterized by nanoparticle tracking analysis, transmission and immune electron microscopy and western blot were used in functional cytotoxic experiments. HGSC explant culture-derived exosomes, previously studied by us, were used for comparison.

Results: HGSC exosomes from patients’ sera downregulated NKG2D-mediated cytotoxicity in NK cells of healthy donors. In a subgroup of subjects, NKG2D expression on CTLs and NK cells was upregulated after surgery, correlating to a decrease in the concentration of exosomes in postoperative sera. An overall significantly improved NKG2D-mediated cytotoxic response of the HGSC patients’ own NK cells in postoperative compared to preoperative samples was noted.

Conclusions: Surgical removal of the primary tumor has a beneficial effect, relieving the exosome-mediated suppression of NKG2D cytotoxicity in HGSC patients, thus boostering their ability to combat cancer.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023
Keywords
cytotoxicity, EOC/HGSC, epithelial ovarian cancer, exosomes, immune suppression, NKG2D, NKG2D ligands, surgery
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:umu:diva-201334 (URN)10.1111/aji.13647 (DOI)000888859600001 ()36335434 (PubMedID)2-s2.0-85142285991 (Scopus ID)
Funder
Swedish Research Council, 18-20–345240311Swedish Cancer Society, CAN 2018/350; no. 18 07 17
Available from: 2022-12-15 Created: 2022-12-15 Last updated: 2022-12-30Bibliographically approved
Yong-Dae, G., Mahani, S. A., Nagaev, I., Mincheva-Nilsson, L. & Evander, M. (2021). Rift valley fever virus propagates in human villous trophoblast cell lines and induces cytokine mrna responses known to provoke miscarriage. Viruses, 13(11), Article ID 2265.
Open this publication in new window or tab >>Rift valley fever virus propagates in human villous trophoblast cell lines and induces cytokine mrna responses known to provoke miscarriage
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2021 (English)In: Viruses, E-ISSN 1999-4915, Vol. 13, no 11, article id 2265Article in journal (Refereed) Published
Abstract [en]

The mosquito-borne Rift Valley fever (RVF) is a prioritised disease that has been listed by the World Health Organization for urgent research and development of counteraction. Rift Valley fever virus (RVFV) can cause a cytopathogenic effect in the infected cell and induce hyperimmune responses that contribute to pathogenesis. In livestock, the consequences of RVFV infection vary from mild symptoms to abortion. In humans, 1–3% of patients with RVFV infection develop severe disease, manifested as, for example, haemorrhagic fever, encephalitis or blindness. RVFV infection has also been associated with miscarriage in humans. During pregnancy, there should be a balance between pro-inflammatory and anti-inflammatory mediators to create a protective environment for the placenta and foetus. Many viruses are capable of penetrating that protective environment and infecting the foetal–maternal unit, possibly via the trophoblasts in the placenta, with potentially severe consequences. Whether it is the viral infection per se, the immune response, or both that contribute to the pathogenesis of miscarriage remains unknown. To investigate how RVFV could contribute to pathogenesis during pregnancy, we infected two human trophoblast cell lines, A3 and Jar, representing normal and transformed human villous trophoblasts, respectively. They were infected with two RVFV variants (wild-type RVFV and RVFV with a deleted NSs protein), and the infection kinetics and 15 different cytokines were analysed. The trophoblast cell lines were infected by both RVFV variants and infection caused upregulation of messenger RNA (mRNA) expression for interferon (IFN) types I–III and inflammatory cytokines, combined with cell linespecific mRNA expression of transforming growth factor (TGF)-β1 and interleukin (IL)-10. When comparing the two RVFV variants, we found that infection with RVFV lacking NSs function caused a hyper-IFN response and inflammatory response, while the wild-type RVFV suppressed the IFN I and inflammatory response. The induction of certain cytokines by RVFV infection could potentially lead to teratogenic effects that disrupt foetal and placental developmental pathways, leading to birth defects and other pregnancy complications, such as miscarriage.

Place, publisher, year, edition, pages
MDPI, 2021
Keywords
Cytokine, Human villous trophoblast, Inflammatory cytokines, Interferon, Miscarriage, Rift valley fever virus
National Category
Microbiology in the medical area
Identifiers
urn:nbn:se:umu:diva-189994 (URN)10.3390/v13112265 (DOI)000725992400001 ()2-s2.0-85119521104 (Scopus ID)
Funder
Region VästerbottenSwedish Research Council, 2018-02637
Available from: 2021-11-30 Created: 2021-11-30 Last updated: 2024-01-17Bibliographically approved
Israelsson, P., Dehlin, E., Nagaev, I., Lundin, E., Ottander, U. & Mincheva-Nilsson, L. (2020). Cytokine mRNA and protein expression by cell cultures of epithelial ovarian cancer: Methodological considerations on the choice of analytical method for cytokine analyses. American Journal of Reproductive Immunology, 84(1), Article ID e13249.
Open this publication in new window or tab >>Cytokine mRNA and protein expression by cell cultures of epithelial ovarian cancer: Methodological considerations on the choice of analytical method for cytokine analyses
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2020 (English)In: American Journal of Reproductive Immunology, ISSN 1046-7408, E-ISSN 1600-0897, Vol. 84, no 1, article id e13249Article in journal (Refereed) Published
Abstract [en]

Problem: To get a comprehensive picture of cytokine expression in health and disease is difficult, cytokines are transiently and locally expressed, and protein analyses are burdened by biological modifications, technical issues, and sensitivity to handling of samples. Thus, alternative methods, based on molecular techniques for cytokine mRNA analyses, are often used. We compared cytokine mRNA and protein expression to evaluate whether cytokine mRNA profiles can be used instead of protein analyses.

Method of study: In kinetic experiments, cytokine mRNA and protein expression of IL-1 beta, IL-6, IL-8, TNF-alpha, and TNF-beta/LTA were studied using real-time RT-qPCR and Luminex(R) microarrays in the ovarian cancer cell lines OVCAR-3, SKOV-3 and the T-cell line Jurkat, after activation of transcription by thermal stress. In addition, we analyzed IL-6 and IL-8 mRNA and protein in a small number of ovarian cancer patients.

Results: Ovarian cancer cells can express cytokines on both mRNA and protein level, with 1-4 hours' time delay between the mRNA and protein peak and a negative Spearman correlation. The mRNA and protein expression in patient samples was poorly correlated, reflecting previous studies.

Conclusion: Cytokine mRNA and protein expression levels show diverging results, depending on the material analyzed and the method used. Considering the high sensitivity and reproducibility of real-time RT-qPCR, we suggest that cytokine mRNA profiles could be used as a proxy for protein expression for some specific purposes, such as comparisons between different patient groups, and in defining mechanistic pathways involved in the pathogenesis of cancer and other pathological conditions.

Place, publisher, year, edition, pages
John Wiley & Sons, 2020
Keywords
cytokine, mRNA, ovarian cancer, protein, protein microarray, real-time polymerase chain reaction
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:umu:diva-171392 (URN)10.1111/aji.13249 (DOI)000530699700001 ()32307767 (PubMedID)2-s2.0-85085074930 (Scopus ID)
Available from: 2020-06-12 Created: 2020-06-12 Last updated: 2023-03-24Bibliographically approved
Björk, E., Vinnars, M.-T., Nagaev, I., Nagaeva, O., Lundin, E., Ottander, U. & Mincheva-Nilsson, L. (2020). Enhanced local and systemic inflammatory cytokine mRNA expression in women with endometriosis evokes compensatory adaptive regulatory mRNA response that mediates immune suppression and impairs cytotoxicity. American Journal of Reproductive Immunology, 84(4), Article ID e13298.
Open this publication in new window or tab >>Enhanced local and systemic inflammatory cytokine mRNA expression in women with endometriosis evokes compensatory adaptive regulatory mRNA response that mediates immune suppression and impairs cytotoxicity
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2020 (English)In: American Journal of Reproductive Immunology, ISSN 1046-7408, E-ISSN 1600-0897, Vol. 84, no 4, article id e13298Article in journal (Refereed) Published
Abstract [en]

Problem: Endometriosis is a disease characterized by ectopic implantation of endometrium and impaired immune responses. To explore its pathogenic mechanisms, we studied the local and systemic cytokine mRNA profiles and their role in the immunity of patients with endometriosis and healthy controls.

Method of Study: mRNA for eleven cytokines defining cytotoxic Th1, humoral Th2, regulatory Tr1/Th3, and inflammatory cytokine profiles was characterized locally in endometriotic tissue and endometrium, and systemically in PBMCs from women with endometriosis and healthy controls, using real‐time qRT‐PCR. In addition, immunohistochemical stainings with monoclonal antibodies were performed looking for T regulatory cells in endometriotic lesions.

Results: We found a downregulation of mRNA for cytokines mediating cytotoxicity and antibody response and an upregulation of inflammatory and T‐regulatory cytokines in the endometriotic tissues and endometrium from the patients with endometriosis, suggesting enhanced local inflammation and priming of an adaptive regulatory response. Consistent with those findings, there was an abundancy of T regulatory cells in the endometriotic lesions.

Conclusions: The ectopic implantation seen in endometriosis could be possible as a consequence of increased inflammation and priming of adaptive T regulatory cells, resulting in impaired cytotoxicity and enhanced immune suppression.

Place, publisher, year, edition, pages
John Wiley & Sons, 2020
Keywords
Cytokines, Cytotoxicity, Endometriosis, Immune suppression, Inflammation, Regulatory T-Lymphocytes
National Category
Obstetrics, Gynecology and Reproductive Medicine
Identifiers
urn:nbn:se:umu:diva-173755 (URN)10.1111/aji.13298 (DOI)000548188900001 ()32623813 (PubMedID)2-s2.0-85087896208 (Scopus ID)
Funder
Swedish Research Council, 18-20-345240311Swedish Cancer Society, CAN 2018/350Swedish Cancer Society, 18 07 17
Available from: 2020-07-31 Created: 2020-07-31 Last updated: 2023-03-23Bibliographically approved
Israelsson, P., Labani-Motlagh, A., Nagaev, I., Dehlin, E., Nagaeva, O., Lundin, E., . . . Mincheva-Nilsson, L. (2019). Assessment of cytokine mRNA expression profiles in tumor microenvironment and peripheral blood mononuclear cells of patients with high-grade serous carcinoma of the ovary. International Journal of Gynecological Cancer, 29, A138-A138
Open this publication in new window or tab >>Assessment of cytokine mRNA expression profiles in tumor microenvironment and peripheral blood mononuclear cells of patients with high-grade serous carcinoma of the ovary
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2019 (English)In: International Journal of Gynecological Cancer, ISSN 1048-891X, E-ISSN 1525-1438, Vol. 29, p. A138-A138Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Introduction/Background Tumor establishment, metastatic spreading and poor survival in ovarian cancer is strongly associated with progressive derangement of the patient‘s immune system. Accumulating evidence suggests that immune impairment is influenced by the production and presence of cytokines in the tumor microenvironment.

Methodology Cytokine mRNA profiles in tumor tissue and peripheral blood mononuclear cells (PBMC) were analyzed in patients with high grade serous carcinoma (HGSC) of the ovary and compared it to patients with benign ovarian conditions and controls with normal ovaries. Cytokine assessment was done by real-time quantitative RT-PCR and specific primers and probes for 12 cytokines-IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-15, TNF-α, TNF-β/LTA, TGF-β1, and GM-CSF chosen to distinguish between cytotoxic Th1, humoral Th2, regulatory Th3/Tr1 and inflammatory responses.

Results The cytokine mRNA response in the HGSC patients was significantly up regulated compared to patients with benign ovarian conditions and normal ovary controls confirming the immunogenicity of HGSC and implying immune recognition and reaction locally in the tumor microenvironment and systemically in the peripheral blood.There was an up-regulation of inflammatory and inhibitory cytokine mRNA promoting tumor progression, T-regulatory cell priming and T-regulatory cell-mediated immune suppression. In contrast, there was an inability to mount the crucially important IFN gamma response needed for upregulation of the cytotoxic anti-tumor response in the local microenvironment. In addition, systemic IL-4- mediated Th2 response prevailed in the peripheral blood deviating the systemic defense towards humoral immunity.

Conclusion Taken together, these results suggest local and systemic cytokine cooperation promoting tumor survival, progression and immune escape. Our study confirms and extends previous investigations and contributes to the evaluation of potential cytokine candidates for diagnostic cytokine mRNA profiles and for future therapeutic interventions based on cytokine inhibition.

Place, publisher, year, edition, pages
BMJ Publishing Group Ltd, 2019
National Category
Cancer and Oncology Obstetrics, Gynecology and Reproductive Medicine
Identifiers
urn:nbn:se:umu:diva-170021 (URN)10.1136/ijgc-2019-ESGO.191 (DOI)000523502500191 ()
Note

Supplement: 4

Meeting Abstract: P129

Available from: 2020-05-05 Created: 2020-05-05 Last updated: 2020-05-05Bibliographically approved
Vinnars, M.-T., Björk, E., Nagaev, I., Ottander, U., Bremme, K., Holmlund, U., . . . Mincheva-Nilsson, L. (2018). Enhanced Th1 and inflammatory mRNA responses upregulate NK cell cytotoxicity and NKG2D ligand expression in human pre-eclamptic placenta and target it for NK cell attack. American Journal of Reproductive Immunology, 80(1), Article ID e12969.
Open this publication in new window or tab >>Enhanced Th1 and inflammatory mRNA responses upregulate NK cell cytotoxicity and NKG2D ligand expression in human pre-eclamptic placenta and target it for NK cell attack
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2018 (English)In: American Journal of Reproductive Immunology, ISSN 1046-7408, E-ISSN 1600-0897, Vol. 80, no 1, article id e12969Article in journal (Refereed) Published
Abstract [en]

Problem: Pre-eclampsia (PE), a severe human pregnancy disorder, is associated with exaggerated systemic inflammation, enhanced cytokine production, and increased shedding of microvesicles leading to endothelial dysfunction, coagulopathy, and extensive placenta destruction. The cause of PE is still unclear. Evidence suggests that its origin lies in the placenta and that the maternal immune system is involved. A shift in cytokine production in PE pregnancy promotes NK cell activation, suggested to be important in PE pathogenesis. In line with this suggestion, we studied NK cell cytotoxicity in peripheral blood of PE patients and controls and the mRNA expression of cytokines and of the NKG2D receptor and its ligands MICA/B and ULBP1-3 in PE- and normal placenta.

Method of study: The cytotoxic capacity of peripheral blood NK cells was analyzed using K562 target cells. The cytokine mRNA profiles and the mRNA expression of the NKG2D receptor and its ligands MICA/B and ULBP 1-3 in PE placenta were assessed and compared to those in normal placenta using real-time quantitative RT-PCR.

Results: The cytotoxicity of peripheral blood NK cells was upregulated in PE cases. Further, we found an enhanced inflammatory cytokine mRNA response combined with a dysregulated regulatory response and a significant mRNA overexpression of NKG2D receptor and its ligands MICA/B and ULBP in PE placenta.

Conclusion: The destruction of chorionic villi observed in PE placenta might be conveyed by an enhanced local cytotoxic response through the NKG2D receptor-ligand pathway, which in turn might be promoted by an intense inflammatory response not counteracted by regulatory cytokine responses.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018
Keywords
cytokines, inflammation, natural killer cells, NKG2D receptor-ligand system, pre-eclampsia, Treg
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:umu:diva-150750 (URN)10.1111/aji.12969 (DOI)000436401600013 ()29741244 (PubMedID)2-s2.0-85046661409 (Scopus ID)
Available from: 2018-08-16 Created: 2018-08-16 Last updated: 2023-03-24Bibliographically approved
Israelsson, P., Labani-Motlagh, A., Nagaev, I., Dehlin, E., Nagaeva, O., Lundin, E., . . . Mincheva-Nilsson, L. (2017). Assessment of cytokine mRNA expression profiles in tumor microenvironment and peripheral blood mononuclear cells of patients with high-grade serous carcinoma of the ovary. Journal of Cancer Science & Therapy, 9(5), 422-429
Open this publication in new window or tab >>Assessment of cytokine mRNA expression profiles in tumor microenvironment and peripheral blood mononuclear cells of patients with high-grade serous carcinoma of the ovary
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2017 (English)In: Journal of Cancer Science & Therapy, ISSN 1948-5956, Vol. 9, no 5, p. 422-429Article in journal (Refereed) Published
Abstract [en]

Objective: Tumor establishment, metastatic spreading and poor survival in ovarian cancer is strongly associated with progressive derangement of the patient’s immune system. Accumulating evidence suggests that immune impairment is influenced by the production and presence of cytokines in the tumor microenvironment. Methods: Cytokine mRNA profiles in tumor tissue and peripheral blood mononuclear cells (PBMC) were analyzed in patients with high grade serous carcinoma (HGSC) of the ovary and compared it to patients with benign ovarian conditions and controls with normal ovaries. Cytokine assessment was done by real-time quantitative RT-PCR and specific primers and probes for 12 cytokines-IFN-γ, IL-1β, IL-2, IL-4, IL-6, IL-8, IL-10, IL-15, TNF-α, TNF-β/LTA, TGF-β1, and GM-CSF chosen to distinguish between cytotoxic Th1, humoral Th2, regulatory Th3/Tr1 and inflammatory responses. Results: The cytokine mRNA response in the HGSC patients was significantly up regulated compared to patients with benign ovarian conditions and normal ovary controls confirming the immunogenicity of HGSC and implying immune recognition and reaction locally in the tumor microenvironment and systemically in the peripheral blood.There was an up-regulation of inflammatory and inhibitory cytokine mRNA promoting tumor progression, T-regulatory cell priming and T-regulatory cell-mediated immune suppression. In contrast, there was an inability to mount the crucially important IFN gamma response needed for upregulation of the cytotoxic anti-tumor response in the local microenvironment. In addition, systemic IL-4- mediated Th2 response prevailed in the peripheral blood deviating the systemic defense towards humoral immunity. Conclusions: Taken together, these results suggest local and systemic cytokine cooperation promoting tumor survival, progression and immune escape. Our study confirms and extends previous investigations and contributes to the evaluation of potential cytokine candidates for diagnostic cytokine mRNA profiles and for future therapeutic interventions based on cytokine inhibition.

Keywords
Cytokines, High-grade serous ovarian carcinoma (HGSC), EOC, Tumor microenvironment, Tumor inflammation, Immune suppression
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:umu:diva-138256 (URN)10.4172/1948-5956.1000453 (DOI)
Available from: 2017-08-15 Created: 2017-08-15 Last updated: 2021-03-02Bibliographically approved
Holm, A., Nagaeva, O., Nagaev, I., Loizou, C., Laurell, G., Mincheva-Nilsson, L., . . . Olofsson, K. (2017). Lymphocyte profile and cytokine mRNA expression in peripheral blood mononuclear cells of patients with recurrent respiratory papillomatosis suggest dysregulated cytokine mRNA response and impaired cytotoxic capacity. Immunity, Inflammation and Disease, 5(4), 541-550
Open this publication in new window or tab >>Lymphocyte profile and cytokine mRNA expression in peripheral blood mononuclear cells of patients with recurrent respiratory papillomatosis suggest dysregulated cytokine mRNA response and impaired cytotoxic capacity
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2017 (English)In: Immunity, Inflammation and Disease, E-ISSN 2050-4527, Vol. 5, no 4, p. 541-550Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: Recurrent respiratory papillomatosis (RRP) is a relatively rare, chronic disease caused by Human Papilloma Virus (HPV) 6 and 11, and characterized by wart-like lesions in the airway affecting voice and respiratory function. The majority of HPV infections are asymptomatic and resolve spontaneously, however, some individuals are afflicted with persistent HPV infections. Failure to eliminate HPV 6 and 11 due to a defect immune responsiveness to these specific genotypes is proposed to play a major role in the development of RRP.

METHODS: We performed a phenotypic characterization of peripheral blood mononuclear cells (PBMC) collected from 16 RRP patients and 12 age-matched healthy controls, using immunoflow cytometry, and monoclonal antibodies against differentiation and activation markers. The cytokine mRNA profile of monocytes, T helper-, T cytotoxic-, and NK cells was assessed using RT-qPCR cytokine analysis, differentiating between Th1-, Th2-, Th3/regulatory-, and inflammatory immune responses.

RESULTS: We found a dominance of cytotoxic T cells, activated NK cells, and high numbers of stressed MIC A/B expressing lymphocytes. There was an overall suppression of cytokine mRNA production and an aberrant cytokine mRNA profile in the activated NK cells.

CONCLUSION: These findings demonstrate an immune dysregulation with inverted CD4(+) /CD8(+) ratio and aberrant cytokine mRNA production in RRP patients, compared to healthy controls.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2017
Keywords
Human, T Cells, natural killer T cells, viral/retroviral
National Category
Immunology Immunology in the medical area
Identifiers
urn:nbn:se:umu:diva-142017 (URN)10.1002/iid3.188 (DOI)000424098900015 ()28805308 (PubMedID)2-s2.0-85042626757 (Scopus ID)
Available from: 2017-11-16 Created: 2017-11-16 Last updated: 2023-03-24Bibliographically approved
Andersen, M., Nagaev, I., Meyer, M. K., Nagaeva, O., Wikberg, J., Mincheva-Nilsson, L. & Andersen, G. N. (2017). Melanocortin 2, 3 and 4 Receptor Gene Expressions are Downregulated in CD8(+) T Cytotoxic Lymphocytes and CD19(+) B Lymphocytes in Rheumatoid Arthritis Responding to TNF- Inhibition. Scandinavian Journal of Immunology, 86(1), 31-39
Open this publication in new window or tab >>Melanocortin 2, 3 and 4 Receptor Gene Expressions are Downregulated in CD8(+) T Cytotoxic Lymphocytes and CD19(+) B Lymphocytes in Rheumatoid Arthritis Responding to TNF- Inhibition
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2017 (English)In: Scandinavian Journal of Immunology, ISSN 0300-9475, E-ISSN 1365-3083, Vol. 86, no 1, p. 31-39Article in journal (Refereed) Published
Abstract [en]

Melanocortin signalling in leucocyte subsets elicits anti-inflammatory and immune tolerance inducing effects in animal experimental inflammation. In man, however, the effects of melanocortin signalling in inflammatory conditions have scarcely been examined. We explored the differential reactions of melanocortin 1-5 receptors (MC1-5R) gene expressions in pathogenetic leucocyte subsets in rheumatoid arthritis (RA) to treatment with TNF- inhibitor adalimumab. Seven patients with active RA donated blood at start and at 3-month treatment. CD4(+) T helper (h) lymphocytes (ly), CD8(+) T cytotoxic (c) ly, CD19(+) B ly and CD14(+) monocytes were isolated, using immunomagnetic beads, total RNA extracted and reverse transcription quantitative polymerase chain reaction (RT-qPCR) performed. Fold changes in MC1-5R, Th1-, inflammatory- and regulatory cytokine gene expressions were assessed for correlation. Six patients responded to adalimumab treatment, while one patient was non-responder. In all lymphocyte subtypes, MC1-5R gene expressions decreased in responders and increased in the non-responder. In responders, decrease in MC2R, MC3R and MC4R gene expressions in CD8(+) Tc and CD19(+) B ly was significant. Fold change in MC1-5R and IFN gene expressions correlated significantly in CD8(+) Tc ly, while fold change in MC1R, MC3R and MC5R and IL-1 gene expressions correlated significantly in CD4(+) Th ly. Our results show regulation of MC2R, MC3R and MC4R gene expressions in CD8(+) Tc ly and CD19(+) B ly. The correlations between fold change in different MCRs and disease driving cytokine gene expressions in CD8(+) Tc ly and CD4(+) Th ly point at a central immune modulating function of the melanocortin system in RA.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:umu:diva-137617 (URN)10.1111/sji.12555 (DOI)000403722100004 ()28426141 (PubMedID)2-s2.0-85020490401 (Scopus ID)
Available from: 2017-07-10 Created: 2017-07-10 Last updated: 2023-03-23Bibliographically approved
Labani-Motlagh, A., Israelsson, P., Ottander, U., Lundin, E., Nagaev, I., Nagaeva, O., . . . Mincheva-Nilsson, L. (2016). Differential expression of ligands for NKG2D and DNAM-1 receptors by epithelial ovarian cancer-derived exosomes and its influence on NK cell cytotoxicity. Tumor Biology, 37(4), 5455-5466
Open this publication in new window or tab >>Differential expression of ligands for NKG2D and DNAM-1 receptors by epithelial ovarian cancer-derived exosomes and its influence on NK cell cytotoxicity
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2016 (English)In: Tumor Biology, ISSN 1010-4283, E-ISSN 1423-0380, Vol. 37, no 4, p. 5455-5466Article in journal (Refereed) Published
Abstract [en]

Cancers constitutively produce and secrete into the blood and other biofluids 30-150 nm-sized endosomal vehicles called exosomes. Cancer-derived exosomes exhibit powerful influence on a variety of biological mechanisms to the benefit of the tumors that produce them. We studied the immunosuppressive ability of epithelial ovarian cancer (EOC) exosomes on two cytotoxic pathways of importance for anticancer immunity-the NKG2D receptor-ligand pathway and the DNAM-1-PVR/nectin-2 pathway. Using exosomes, isolated from EOC tumor explant and EOC cell-line culture supernatants, and ascitic fluid from EOC patients, we studied the expression of NKG2D and DNAM-1 ligands on EOC exosomes and their ability to downregulate the cognate receptors. Our results show that EOC exosomes differentially and constitutively express NKG2D ligands from both MICA/B and ULBP families on their surface, while DNAM-1 ligands are more seldom expressed and not associated with the exosomal membrane surface. Consequently, the NKG2D ligand-bearing EOC exosomes significantly downregulated the NKG2D receptor expression on peripheral blood mononuclear cells (PBMC) while the DNAM-1 receptor was unaffected. The downregulation of NKG2D receptor expression was coupled to inhibition of NKG2D receptor-ligand-mediated degranulation and cytotoxicity measured in vitro with OVCAR-3 and K562 cells as targets. The EOC exosomes acted as a decoy impairing the NKG2D mediated cytotoxicity while the DNAM-1 receptor-ligand system remained unchanged. Taken together, our results support and explain the mechanism behind the recently reported finding that in EOC, NK-cell recognition and killing of tumor cells was mainly dependent on DNAM-1 signaling while the contribution of the NKG2D receptor-ligand pathway was complementary and uncertain.

Keywords
Epithelial ovarian cancer/EOC, Tumor, Exosomes, NKG2D, DNAM-1/CD266, Cytotoxicity, MICA/B, ULBP, PVR, Nectin-2
National Category
Cancer and Oncology Immunology in the medical area
Identifiers
urn:nbn:se:umu:diva-118529 (URN)10.1007/s13277-015-4313-2 (DOI)000374904500128 ()26563374 (PubMedID)2-s2.0-84946924480 (Scopus ID)
Available from: 2016-03-22 Created: 2016-03-22 Last updated: 2023-03-23Bibliographically approved
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