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BETA
Loskog, Angelica S.
Alternative names
Publications (10 of 89) Show all publications
Amini, R.-M., Enblad, G., Hollander, P., Laszlo, S., Eriksson, E., Gustafsson, K. A., . . . Thörn, I. (2019). Altered profile of immune regulatory cells in the peripheral blood of lymphoma patients. BMC Cancer, 19, Article ID 316.
Open this publication in new window or tab >>Altered profile of immune regulatory cells in the peripheral blood of lymphoma patients
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2019 (English)In: BMC Cancer, ISSN 1471-2407, E-ISSN 1471-2407, Vol. 19, article id 316Article in journal (Refereed) Published
Abstract [en]

Background: Regulatory immune cells may modulate the lymphoma microenvironment and are of great interest due to the increasing prevalence of treatment with immunotherapies in lymphoma patients. The aim was to explore the composition of different immune regulatory cell subsets in the peripheral blood of newly diagnosed lymphoma patients in relation to treatment outcome. Methods: Forty-three newly diagnosed patients with lymphoma were included in the study; 24 with high-grade B-cell lymphoma (HGBCL) and 19 with classical Hodgkin lymphoma (cHL). Peripheral blood was prospectively collected and immune regulatory cells were identified by multi-color flow cytometry and analyzed in relation to healthy blood donors and clinical characteristics and outcome. Results: The percentage of CD3-positive T-cells was lower (p=0.03) in the peripheral blood of lymphoma patients at diagnosis compared to healthy blood donors regardless of lymphoma subtype, although statistically, neither the percentage of monocytes (p=0.2) nor the T-cell/monocyte ratio (p=0.055) differed significantly. A significant decrease in the percentage of a subset of regulatory NK cells (CD7(+)/CD3(-)/CD56(bright)/CD16(dim/-)) was identified in the peripheral blood of lymphoma patients compared to healthy blood donors (p=0.003). Lymphoma patients also had more granulocytic myeloid-derived suppressor cells (MDSCs) (p=0.003) compared to healthy blood donors, whereas monocytic MDSCs did not differ significantly (p=0.07). A superior disease-free survival was observed for cHL patients who had an increase in the percentage of granulocytic MDSCs (p=0.04). Conclusions: An altered profile of immune cells in the peripheral blood with a decrease in T-cells and regulatory NK-cells was observed in newly diagnosed lymphoma patients. CHL patients with higher percentages of regulatory NK cells and higher percentages of granulocytic MDSCs might have a better outcome, although the number of patients was low.

Place, publisher, year, edition, pages
BMC, 2019
Keywords
Immune regulatory cells, NK cells, T cells, Myeloid derived suppressor cells, High-grade B cell lymphoma, Hodgkin lymphoma
National Category
Cancer and Oncology
Identifiers
urn:nbn:se:uu:diva-382563 (URN)10.1186/s12885-019-5529-0 (DOI)000463739000007 ()30953461 (PubMedID)
Available from: 2019-05-03 Created: 2019-05-03 Last updated: 2019-05-03Bibliographically approved
Eriksson, E., Milenova, I., Wenthe, J., Moreno, R., Alemany, R. & Loskog, A. S. (2019). IL-6 Signaling Blockade during CD40-Mediated Immune Activation Favors Antitumor Factors by Reducing TGF-beta, Collagen Type I, and PD-L1/PD-1. Journal of Immunology, 202(3), 787-798
Open this publication in new window or tab >>IL-6 Signaling Blockade during CD40-Mediated Immune Activation Favors Antitumor Factors by Reducing TGF-beta, Collagen Type I, and PD-L1/PD-1
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2019 (English)In: Journal of Immunology, ISSN 0022-1767, E-ISSN 1550-6606, Vol. 202, no 3, p. 787-798Article in journal (Refereed) Published
Abstract [en]

IL-6 plays a role in cancer pathogenesis via its connection to proteins involved in the formation of desmoplastic stroma and to immunosuppression by driving differentiation of myeloid suppressor cells together with TGF-beta. Inhibition of IL-6 signaling in the tumor microenvironment may, thus, limit desmoplasia and myeloid suppressor cell differentiation. CD40 signaling can further revert myeloid cell differentiation toward antitumor active phenotypes. Hence, the simultaneous use of IL-6 blockade with CD40 stimuli may tilt the tumor microenvironment to promote antitumor immune responses. In this paper, we evaluated the mechanisms of LOAd713, an oncolytic adenovirus designed to block IL-6R signaling and to provide myeloid cell activation via a trimerized membrane-bound isoleucine zipper (TMZ) CD40L. LOAd713-infected pancreatic cancer cells were killed by oncolysis, whereas infection of stellate cells reduced factors involved in stroma formation, including TGF-beta-1 and collagen type I. Virus infection prevented IL-6/GM-CSF-mediated differentiation of myeloid suppressors, but not CD163 macrophages, whereas infection of dendritic cells led to upregulation of maturation markers, including CD83, CD86, IL-12p70, and IFN-gamma. Further, IL-6R blockade prevented upregulation of programed death ligand 1 (PD-L1) and PD-1 on the stimulated dendritic cells. These results suggest that LOAd713 can kill infected tumor cells and has the capacity to affect the tumor microenvironment by stimulating stellate cells and myeloid suppressors with TMZ-CD40L and IL-6R blockade. Gene transfer of murine TMZ-CD40L prolonged survival in an animal model. LOAd713 may be an interesting therapeutic option for cancers connected to IL-6 signaling, such as pancreatic cancer.

Place, publisher, year, edition, pages
AMER ASSOC IMMUNOLOGISTS, 2019
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:uu:diva-376719 (URN)10.4049/jimmunol.1800717 (DOI)000456336000018 ()30617223 (PubMedID)
Funder
Swedish Cancer Society
Available from: 2019-02-11 Created: 2019-02-11 Last updated: 2019-02-11Bibliographically approved
Enblad, G., Karlsson, H., Gammelgård, G., Wenthe, J., Lövgren, T., Amini, R.-M., . . . Loskog, A. (2018). A Phase I/IIa Trial Using CD19-Targeted Third-Generation CAR T Cells for Lymphoma and Leukemia. Clinical Cancer Research, 24(24), 6185-6194
Open this publication in new window or tab >>A Phase I/IIa Trial Using CD19-Targeted Third-Generation CAR T Cells for Lymphoma and Leukemia
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2018 (English)In: Clinical Cancer Research, ISSN 1078-0432, E-ISSN 1557-3265, Vol. 24, no 24, p. 6185-6194Article in journal (Refereed) Published
Abstract [en]

Purpose: The chimeric antigen receptor (CAR) T-cell therapy has been effective for patients with CD19(+) B-cell malignancies. Most studies have investigated the second-generation CARs with either CD28 or 4-1BB costimulatory domains in the CAR receptor. Here, we describe the first clinical phase I/IIa trial using third-generation CAR T cells targeting CD19 to evaluate safety and efficacy.

Patients and Methods: Fifteen patients with B-cell lymphoma or leukemia were treated with CAR T cells. The patients with lymphoma received chemotherapy during CAR manufacture and 11 of 15 were given low-dose cyclophosphamide and fludarabine conditioning prior to CAR infusion. Peripheral blood was sampled before and at multiple time points after CAR infusion to evaluate the persistence of CAR T cells and for immune profiling, using quantitative PCR, flow cytometry, and a proteomic array.

Results: Treatment with third-generation CAR T cells was generally safe with 4 patients requiring hospitalization due to adverse reactions. Six of the 15 patients had initial complete responses [4/11 lymphoma and 2/4 acute lymphoblastic leukemia (ALL)], and 3 of the patients with lymphoma were in remission at 3 months. Two patients are still alive. Best predictor of response was a good immune status prior to CAR infusion with high IL12, DC-Lamp, Fas ligand, and TRAIL. Responding patients had low monocytic myeloid-derived suppressor cells (MDSCs; CD14(+)CD33(+)HLA(-)DR(-)) and low levels of IL6, IL8, NAP3, sPDL1, and sPDL2.

Conclusions: Third-generation CARs may be efficient in patients with advanced B-cell lymphoproliferative malignancy with only modest toxicity. Immune profiling pre- and posttreatment can be used to find response biomarkers.

National Category
Cancer and Oncology Hematology Clinical Laboratory Medicine
Research subject
Pathology
Identifiers
urn:nbn:se:uu:diva-372924 (URN)10.1158/1078-0432.CCR-18-0426 (DOI)000453267600012 ()30097433 (PubMedID)
Funder
Swedish Research CouncilAFA InsuranceSwedish Cancer Society
Available from: 2019-01-10 Created: 2019-01-10 Last updated: 2019-03-29Bibliographically approved
Hollander, P., Rostgaard, K., Ekström-Smedby, K., Molin, D., Loskog, A., de Nully Brown, P., . . . Glimelius, I. (2018). An anergic immune signature in the tumor microenvironment of classical Hodgkin lymphoma is associated with inferior outcome. European Journal of Haematology, 100(1), 88-97
Open this publication in new window or tab >>An anergic immune signature in the tumor microenvironment of classical Hodgkin lymphoma is associated with inferior outcome
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2018 (English)In: European Journal of Haematology, ISSN 0902-4441, E-ISSN 1600-0609, Vol. 100, no 1, p. 88-97Article in journal (Refereed) Published
Abstract [en]

Objective: The classical Hodgkin lymphoma (cHL) tumor microenvironment shows anongoing inflammatory response consisting of varying degrees of infiltrating eosinophils,mast cells, macrophages, regulatory T lymphocytes (Tregs), and activated lymphocytes surrounding the malignant cells. Herein, different immune signatures are characterized and correlated with treatment outcome.

Methods: Tumor-infiltrating leukocytes were phenotyped in biopsies from 459 patients with cHL. Time to progression (TTP) (primary progression, relapse, or death from cHL) and overall survival were analyzed using Cox proportional hazards regression.

Results: The leukocyte infiltration in the microenvironment was highly diverse between patients and was categorized in 4 immune signatures (active, anergic, innate, or mixed). A high proportion of Tregs (anergic) resulted in shorter TTP (median 12.9-year follow-up) in age-adjusted analyses (hazard ratio = 1.82; 95% confidence interval 1.05-3-15). Epstein-Barrvirus (EBV)-positive cases had higher proportions of macrophages and activated lymphocytes than EBV negative, but neither of those leukocytes predicted prognosis.

Conclusions: Abundant Tregs (anergic signature) indicate a shorter TTP, particularly in younger patients. This is probably due to a reduced ability of the immune system to attack the tumor cells. Our data warrant further investigation if these suggested immune signatures could predict outcome of immunotherapy such as immune checkpoint inhibitors.

Keywords
Hodgkin lymphoma, Regulatory T lymphocytes, Tumor microenvironment
National Category
Cancer and Oncology Clinical Laboratory Medicine
Research subject
Pathology; Oncology
Identifiers
urn:nbn:se:uu:diva-335491 (URN)10.1111/ejh.12987 (DOI)000418451500012 ()29064587 (PubMedID)
Funder
Swedish Cancer Society, CAN 2016/440, CAN 2016/607, CAN 2016/552
Available from: 2017-12-06 Created: 2017-12-06 Last updated: 2019-04-02Bibliographically approved
Hoffmann, J.-M., Schubert, M.-L., Wang, L., Hueckelhoven, A., Sellner, L., Stock, S., . . . Schmitt, M. (2018). Differences in Expansion Potential of Naive Chimeric Antigen Receptor T Cells from Healthy Donors and Untreated Chronic Lymphocytic Leukemia Patients. Frontiers in Immunology, 8, Article ID 1956.
Open this publication in new window or tab >>Differences in Expansion Potential of Naive Chimeric Antigen Receptor T Cells from Healthy Donors and Untreated Chronic Lymphocytic Leukemia Patients
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2018 (English)In: Frontiers in Immunology, ISSN 1664-3224, E-ISSN 1664-3224, Vol. 8, article id 1956Article in journal (Refereed) Published
Abstract [en]

Introduction: Therapy with chimeric antigen receptor T (CART) cells for hematological malignancies has shown promising results. Effectiveness of CART cells may depend on the ratio of naive (T-N) vs. effector (T-E) T cells, TN cells being responsible for an enduring antitumor activity through maturation. Therefore, we investigated factors influencing the T-N/T-E ratio of CART cells.

Materials and methods: CART cells were generated upon transduction of peripheral blood mononuclear cells with a CD19.CAR-CD28-CD137zeta third generation retroviral vector under two different stimulating culture conditions: anti-CD3/anti-CD28 antibodies adding either interleukin (IL)-7/1L-15 or IL-2. CART cells were maintained in culture for 20 days. We evaluated 24 healthy donors (HDs) and 11 patients with chronic lymphocytic leukemia (CLL) for the composition of cell subsets and produced CART cells. Phenotype and functionality were tested using flow cytometry and chromium release assays.

Results: IL -7/1L-15 preferentially induced differentiation into T-N, stem cell memory (T-SCM: naive CD27+ CD95+), CD4+ and CXCR3+ CART cells, while IL-2 increased effector memory (T-EM), CD56+ and CD4+ T regulatory (T-Reg) CART cells. The net amplification of different CART subpopulations derived from HDs and untreated CLL patients was compared. Particularly the expansion of CD4+ CART(N) cells differed significantly between the two groups. For HDs, this subtype expanded >60-fold, whereas CD4+ CART(N) cells of untreated CLL patients expanded less than 10-fold. Expression of exhaustion marker programmed cell death 1 on CART(N) cells on day 10 of culture was significantly higher in patient samples compared to HD samples. As the percentage of malignant B cells was expectedly higher within patient samples, an excessive amount of B cells during culture could account for the reduced expansion potential of CART(N) cells in untreated CLL patients. Final T-N/T-E ratio stayed <0.3 despite stimulation condition for patients, whereas this ratio was >2 in samples from HDs stimulated with IL-7/1L-15, thus demonstrating efficient CART(N) expansion.

Conclusion: Untreated CLL patients might constitute a challenge for long-lasting CART effects in vivo since only a low number of T-N among the CART product could be generated. Depletion of malignant B cells before starting CART production might be considered to increase the T-N/T-E ratio within the CART product.

Place, publisher, year, edition, pages
FRONTIERS MEDIA SA, 2018
Keywords
chimeric antigen receptor, immunotherapy, CD19, T cell subpopulations, naive T cells, cytokines, chronic lymphocytic leukemia, T cell expansion
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:uu:diva-341573 (URN)10.3389/fimmu.2017.01956 (DOI)000419713000002 ()
Available from: 2018-02-12 Created: 2018-02-12 Last updated: 2018-02-12Bibliographically approved
Wenthe, J., Eriksson, E., Hellström, A.-C. & Loskog, A. S. (2018). Immunostimulatory gene therapy enhances PD-1 blockade antibody therapy in experimental lung cancer. CANCER IMMUNOLOGY RESEARCH, 6(9 Suppl.)
Open this publication in new window or tab >>Immunostimulatory gene therapy enhances PD-1 blockade antibody therapy in experimental lung cancer
2018 (English)In: CANCER IMMUNOLOGY RESEARCH, ISSN 2326-6066, Vol. 6, no 9 Suppl.Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER ASSOC CANCER RESEARCH, 2018
National Category
Immunology in the medical area Cancer and Oncology
Identifiers
urn:nbn:se:uu:diva-377111 (URN)10.1158/2326-6074.TUMIMM17-B07 (DOI)000456801700062 ()
Available from: 2019-02-18 Created: 2019-02-18 Last updated: 2019-02-18Bibliographically approved
Eriksson, E., Milenova, I., Wenthe, J., Moreno, R., Ullenhag, G., Dimberg, A., . . . Loskog, A. S. (2017). Activating CD40 While Inhibiting IL6R Induces Cytokine Production without PDL1 Upregulation in DCs. Paper presented at 20th Annual Meeting of the American-Society-of-Gene-and-Cell-Therapy (ASGCT), MAY 10-13, 2017, Washington, DC. Molecular Therapy, 25(5 S1), 54-54
Open this publication in new window or tab >>Activating CD40 While Inhibiting IL6R Induces Cytokine Production without PDL1 Upregulation in DCs
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2017 (English)In: Molecular Therapy, ISSN 1525-0016, E-ISSN 1525-0024, Vol. 25, no 5 S1, p. 54-54Article in journal, Meeting abstract (Other academic) Published
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
Identifiers
urn:nbn:se:uu:diva-331371 (URN)000401083600113 ()
Conference
20th Annual Meeting of the American-Society-of-Gene-and-Cell-Therapy (ASGCT), MAY 10-13, 2017, Washington, DC
Available from: 2017-10-18 Created: 2017-10-18 Last updated: 2017-10-18Bibliographically approved
Eriksson, E., Moreno, R., Milenova, I. Y., Liljenfeldt, L., Dieterich, L. C., Christiansson, L., . . . Loskog, A. (2017). Activation of myeloid and endothelial cells by CD40L gene therapy supports T-cell expansion and migration into the tumor microenvironment. Gene Therapy, 24(2), 92-103
Open this publication in new window or tab >>Activation of myeloid and endothelial cells by CD40L gene therapy supports T-cell expansion and migration into the tumor microenvironment
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2017 (English)In: Gene Therapy, ISSN 0969-7128, E-ISSN 1476-5462, Vol. 24, no 2, p. 92-103Article in journal (Refereed) Published
Abstract [en]

CD40 is an interesting target in cancer immunotherapy due to its ability to stimulate T-helper 1 immunity via maturation of dendritic cells and to drive M2 to M1 macrophage differentiation. Pancreatic cancer has a high M2 content that has shown responsive to anti-CD40 agonist therapy and CD40 may thus be a suitable target for immune activation in these patients. In this study, a novel oncolytic adenovirus armed with a trimerized membrane-bound extracellular CD40L (TMZ-CD40L) was evaluated as a treatment of pancreatic cancer. Further, the CD40L mechanisms of action were elucidated in cancer models. The results demonstrated that the virus transferring TMZ-CD40L had oncolytic capacity in pancreatic cancer cells and could control tumor progression. TMZ-CD40L was a potent stimulator of human myeloid cells and T-cell responses. Further, CD40L-mediated stimulation increased tumor-infiltrating T cells in vivo, which may be due to a direct activation of endothelial cells to upregulate receptors for lymphocyte attachment and transmigration. In conclusion, CD40L-mediated gene therapy is an interesting concept for the treatment of tumors with high levels of M2 macrophages, such as pancreatic cancer, and an oncolytic virus as carrier of CD40L may further boost tumor killing and immune activation.

National Category
Other Medical Biotechnology
Research subject
Immunology
Identifiers
urn:nbn:se:uu:diva-318170 (URN)10.1038/gt.2016.80 (DOI)000394682800006 ()27906162 (PubMedID)
Funder
Swedish Cancer Society
Available from: 2017-03-23 Created: 2017-03-23 Last updated: 2017-10-10Bibliographically approved
Schiza, A., Wenthe, J., Mangsbo, S., Svensson, E., Nilsson, A., Tötterman, T., . . . Ullenhag, G. (2017). Adenovirus-mediated CD40L gene transfer increases Teffector/Tregulatory cell ratio and upregulates death receptors in metastatic melanoma patients. Journal of Translational Medicine, 15(79)
Open this publication in new window or tab >>Adenovirus-mediated CD40L gene transfer increases Teffector/Tregulatory cell ratio and upregulates death receptors in metastatic melanoma patients
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2017 (English)In: Journal of Translational Medicine, ISSN 1479-5876, E-ISSN 1479-5876, Vol. 15, no 79Article in journal (Refereed) Published
Abstract [en]

Background and aims: Malignant melanoma is an aggressive tumor sensitive for immunotherapy such as checkpoint blockade antibodies. Still, most patients with late stage disease do not respond, and the side effects can be severe. Stimulation of the CD40 pathway to initiate anti-tumor immunity is a promising alternative. Herein, we demonstrate immune profiling data from melanoma patients treated with an adenovirus-based CD40 ligand gene therapy (AdCD40L). Methods: Peripheral blood mononuclear cells and plasma were collected from malignant melanoma patients (n = 15) enrolled in a phase I/IIa study investigating intratumoral delivery of AdCD40L with or without low dose cyclophosphamide. Cells were analyzed by flow cytometry while plasma samples were analyzed by a multi-array proteomics. Results: All patients had an increased Teffector/Tregulatory cell ratio post therapy. Simultaneously, the death receptors TNFR1 and TRAIL-R2 were significantly up-regulated post treatment. Stem cell factor (SCF), E-selectin, and CD6 correlated to enhanced overall survival while a high level of granulocytic myeloid-derived suppressor cells (gMDSCs), IL8, IL10, TGFb1, CCL4, PlGF and Fl3t ligand was highest in patients with short survival. Conclusions: AdCD40L intratumoral injection induced desirable systemic immune effects that correlated to prolonged survival. Further studies using CD40 stimulation in malignant melanoma are warranted.

Keywords
AdCD40L, Malignant melanoma, Immunotherapy, Proteomics, T regulatory cells, Myeloid-derived suppressor cells
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:uu:diva-322800 (URN)10.1186/s12967-017-1182-z (DOI)000399786900002 ()28427434 (PubMedID)
Available from: 2017-06-20 Created: 2017-06-20 Last updated: 2018-02-20Bibliographically approved
Schiza, A., Wenthe, J., Mangsbo, S., Eriksson, E., Nilsson, A., Tötterman, T., . . . Ullenhag, G. (2017). Adenovirus-mediated CD40L gene transfer increases teffector/tregulatory cell ratio and upregulates death receptors in metastatic melanoma patients. Paper presented at 44th Annual Meeting of the Scandinavian-Society-for-Immunology (SSI), OCT 17-20, 2017, Stockholm, SWEDEN. Scandinavian Journal of Immunology, 86(4), 337-337
Open this publication in new window or tab >>Adenovirus-mediated CD40L gene transfer increases teffector/tregulatory cell ratio and upregulates death receptors in metastatic melanoma patients
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2017 (English)In: Scandinavian Journal of Immunology, ISSN 0300-9475, E-ISSN 1365-3083, Vol. 86, no 4, p. 337-337Article in journal, Meeting abstract (Other academic) Published
National Category
Immunology in the medical area
Identifiers
urn:nbn:se:uu:diva-346969 (URN)000411865200209 ()
Conference
44th Annual Meeting of the Scandinavian-Society-for-Immunology (SSI), OCT 17-20, 2017, Stockholm, SWEDEN
Available from: 2018-03-28 Created: 2018-03-28 Last updated: 2018-03-28Bibliographically approved
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