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2.
Exp Hematol ; 129: 104125, 2024 Jan.
Article in English | MEDLINE | ID: mdl-38743005

ABSTRACT

The revised International Prognostic Index (R-IPI) is an important prognostic tool in diffuse large B cell lymphoma (DLBCL); however, outcomes can vary markedly within R-IPI groups, and additional prognostic markers are needed. We conducted a prospective observational study to evaluate the circulating immature myeloid (IM) cell subsets and cytokine profiles of 31 patients with newly diagnosed DLBCL before and after chemoimmunotherapy. Among circulating IM cells, myeloid-derived suppressor cells (MDSCs) were the predominant cell type (73.8% ± 26%). At baseline, circulating monocytic MDSCs (M-MDSCs) and polymorphonuclear MDSCs (PMN-MDSCs) were predominantly mutually exclusive. Patients with DLBCL clustered into three distinct immunotypes according to MDSC levels and subtype predominance: M-MDSChigh, PMN-MDSChigh, and MDSClow. The M-MDSChigh immunotype was associated with the germinal center B cell-like (GCB) subtype and elevated serum IL-8 and MIP-1α levels. PMN-MDSChigh was associated with the non-GCB subtype and elevated IL-8, MCP-1, IP-10, TNFα, and IL-1Ra levels. Standard chemoimmunotherapy partially reduced M-MDSC distribution across the MDSClow and M-MDSChigh groups. By contrast, among the MDSClow and PMN-MDSChigh groups, PMN-MDSCs persisted after treatment. Two high-risk patients with non-GCB DLBCL and MDSClow immunotype experienced early disease recurrence within 12 months of treatment completion. This study demonstrates that distinct types of MDSCs are associated with subtypes of DLBCL. MDSC levels are dynamic and may be associated with disease status. Persistence of PMN-MDSCs among high-risk patients with DLBCL may be associated with early relapse.


Subject(s)
Lymphoma, Large B-Cell, Diffuse , Myeloid-Derived Suppressor Cells , Humans , Myeloid-Derived Suppressor Cells/immunology , Myeloid-Derived Suppressor Cells/pathology , Myeloid-Derived Suppressor Cells/metabolism , Lymphoma, Large B-Cell, Diffuse/diagnosis , Lymphoma, Large B-Cell, Diffuse/therapy , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/pathology , Lymphoma, Large B-Cell, Diffuse/immunology , Lymphoma, Large B-Cell, Diffuse/blood , Female , Male , Middle Aged , Aged , Prognosis , Inflammation/pathology , Adult , Prospective Studies , Aged, 80 and over , Cytokines/blood , Immunotherapy , Antineoplastic Combined Chemotherapy Protocols/therapeutic use
4.
Article in English | MEDLINE | ID: mdl-38747849

ABSTRACT

This study aimed to provide further insight into the evolutionary dynamics of SARS-CoV-2 by analyzing the case of a 40-year-old man who had previously undergone autologous hematopoietic stem cell transplantation due to a diffuse large B-cell lymphoma. He developed a persistent SARS-CoV-2 infection lasting at least 218 days and did not manifest a humoral immune response to the virus during this follow-up period. Whole-genome sequencing and viral cultures confirmed a persistent infection with a replication-positive virus that had undergone genetic variation for at least 196 days after symptom onset.


Subject(s)
COVID-19 , Immunocompromised Host , SARS-CoV-2 , Virus Shedding , Humans , Adult , Male , COVID-19/immunology , SARS-CoV-2/immunology , SARS-CoV-2/genetics , Lymphoma, Large B-Cell, Diffuse/virology , Lymphoma, Large B-Cell, Diffuse/immunology , Hematopoietic Stem Cell Transplantation , Whole Genome Sequencing
5.
Cell Mol Biol (Noisy-le-grand) ; 70(5): 1-9, 2024 May 27.
Article in English | MEDLINE | ID: mdl-38814241

ABSTRACT

Non-Hodgkin lymphoma (NHL) is a lymphoproliferative disorder derived from either B or T lymphocytes. Among NHL, activated B-cell-like (ABC) diffuse large B-cell lymphoma (DLBCL) and T cell non-Hodgkin lymphomas (T-NHL) are poor prognosis and aggressive subtypes. Macrophages are professional phagocytic cells and dendritic cells (DCs) are professional antigen-presenting cells in immune system. Doxorubicin (Dox) and Etoposide (ET) are the most effective anti-cancer drugs. A20 and CYLD are negative regulators of NF-κB-dependent functions in many cell types. Little is known about the roles of A20 and CYLD in regulating functions of DCs and macrophages from NHL. The present study, therefore, explored whether A20/CYLD expression contributes to functions of DCs and macrophages from NHL. To this end, blood samples of seventy-nine patients with ABC DLBCL and T-NHL were examined. Gene expression profile was determined by quantitative RT-PCR and immunophenotype, cell apoptosis and phagocytosis by flow cytometry. As a result, immunophenotypic analysis showed that the numbers of CD13+CD117-, CD56+CD40+ and CD23+CD40+ expressing cells were significantly elevated in ABC DLBCL cases compared to healthy individuals and T-NHL patients. Interestingly, upon treatment of Dox and ET, the phagocytosis of lymphoma cells was significantly reduced by CD11c+CD123- DCs and the percentage of CD56+ mature DCs was significantly enhanced in ABC DLBCL patients only in the presence of A20 siRNA, but not CYLD siRNA. In conclusion, ABC DLBCL patients with low A20 expression were defective in elimination of lymphoma cells by DCs and linked to killer DC expansion in circulation.


Subject(s)
Dendritic Cells , Lymphoma, Large B-Cell, Diffuse , Phagocytosis , Tumor Necrosis Factor alpha-Induced Protein 3 , Humans , Dendritic Cells/immunology , Dendritic Cells/metabolism , Phagocytosis/drug effects , Tumor Necrosis Factor alpha-Induced Protein 3/metabolism , Tumor Necrosis Factor alpha-Induced Protein 3/genetics , Female , Lymphoma, Large B-Cell, Diffuse/pathology , Lymphoma, Large B-Cell, Diffuse/immunology , Middle Aged , Male , Lymphoma, Non-Hodgkin/pathology , Lymphoma, Non-Hodgkin/immunology , Apoptosis/drug effects , Aged , Adult , Macrophages/metabolism , Macrophages/immunology , Doxorubicin/pharmacology , Doxorubicin/therapeutic use , B-Lymphocytes/immunology , B-Lymphocytes/metabolism , Immunophenotyping
6.
Expert Opin Biol Ther ; 24(5): 321-326, 2024 May.
Article in English | MEDLINE | ID: mdl-38717336

ABSTRACT

INTRODUCTION: At the 65th American Society of Hematology (ASH) 2023 Annual Meeting, the latest advancements in CD20×CD3 BsAbs for B-cell lymphoma (BCL) were highlighted, particularly in relapsed/refractory (R/R) follicular lymphoma (FL) and R/R diffuse large B-cell lymphoma (DLBCL). AREAS COVERED: This summary highlights some of the major studies on CD20×CD3 BsAbs for BCL. EXPERT OPINION/COMMENTARY: CD20×CD3 is the most widely studied BsAb, with promising results in patients with R/R DLBCL and R/R FL ≥ two prior lines of systemic therapy. Trials with the first line of B-cell lymphoma also revealed promising results. Hopefully, BsAb monotherapy or BsAb-containing regimens may become the standard therapy in patients with FL and DLBCL.


Subject(s)
Antibodies, Bispecific , Antigens, CD20 , CD3 Complex , Immunotherapy , Lymphoma, Large B-Cell, Diffuse , Adult , Humans , Antibodies, Bispecific/therapeutic use , Antigens, CD20/immunology , Antineoplastic Agents, Immunological/therapeutic use , CD3 Complex/immunology , Lymphoma, B-Cell/immunology , Lymphoma, B-Cell/drug therapy , Lymphoma, B-Cell/therapy , Lymphoma, Follicular/immunology , Lymphoma, Follicular/drug therapy , Lymphoma, Follicular/therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/therapy , Congresses as Topic
7.
Expert Opin Biol Ther ; 24(5): 389-397, 2024 May.
Article in English | MEDLINE | ID: mdl-38725262

ABSTRACT

INTRODUCTION: The prognosis for large B-cell lymphoma (LBCL) patients who did not respond or relapsed after chimeric antigen receptor (CAR)-T therapy remains dismal, with no established consensus on the most effective salvage regimen. METHODS: We conducted a random-effects meta-analysis of complete response (CR) and overall response rates (ORR) to first-line treatments for CAR-T-relapsed/refractory LBCL. We followed the predefined protocol available at PROSPERO (CRD42023473854). RESULTS: We identified 41 studies evaluating the following interventions: non-CD19 CAR-T, CD19 CAR-T, bispecific antibodies (BiTEs), lenalidomide- and polatuzumab-based regimens, radiotherapy, immune checkpoint inhibitors (ICI), Bruton's Tyrosine Kinase inhibitors (BTKi). Non-CD19 CAR-T cells yielded the best CR (56%, CI: 40-71%), significantly higher than other interventions except CD19 CAR-T (CR = 30%, CI: 7-58%). BiTEs, radiotherapy, lenalidomide- and polatuzumab-based regimens (CR: 28%, 26%, 19%, 24% respectively) did not differ significantly from each other. ICI and BTKi showed the lowest CR rates (12%, CI: 5-20% and 8%, CI: 0-23%, respectively), and were also significantly inferior to BiTEs. ORR was the highest for non-CD19 CAR-T (ORR = 80%, CI: 66-92%), whereas all other regimens yielded values below 50%. CONCLUSIONS: Non-CD19 CAR-T cells were associated with higher response rates and should be considered if patients are eligible. Given the heterogeneity of the estimates, the results should be interpreted cautiously. REGISTRATION: PROSPERO CRD42023473854.


Subject(s)
Immunotherapy, Adoptive , Lymphoma, Large B-Cell, Diffuse , Salvage Therapy , Humans , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Treatment Outcome
8.
Dtsch Med Wochenschr ; 149(11): 630-637, 2024 May.
Article in German | MEDLINE | ID: mdl-38749439

ABSTRACT

The introduction of immunologically targeted therapies has represented a significant advancement in the treatment of B-cell lymphomas, particularly aggressive B-cell lymphoma. CD19 CAR-T cells such as Axicabtagen-Ciloleucel (Axi-cel) and Lisocabtagen Maraleucel (Liso-cel) have been approved since 2022 and 2023, respectively, for second-line therapy of Diffuse Large B-Cell Lymphomas (DLBCL), when there is primary refractory disease or relapse within 12 months after the end of first-line therapy. These therapies result in a significant improvement in progression-free survival compared to the previous standard therapy (salvage chemotherapy followed by high-dose chemotherapy and autologous stem cell transplantation). Especially in elderly patients or patients with underlying medical conditions, CAR-T cell therapies like Axi-cel and Liso-cel demonstrate acceptable tolerability and high efficacy.Furthermore, bispecific T-cell-engaging antibodies ("bispecifics") such as Glofitamab, Epcoritamab, and Mosunetuzumab also represent promising treatment options for patients with relapsed disease after failure of second- or later line therapy and show efficacy even in a subset of patients relapsing after CD19 CAR-T cells. However, randomized study results for these substances are not yet available. They are expected to be used in earlier lines of therapy in the future, especially in combination with standard chemotherapy regimens. Common side effects of bispecific antibody therapies are cytokine release syndrome (CRS) and immune-mediated cytopenias, whereas immune-cell associated neurotoxicity syndrome (ICANS) is relatively rare compared to CD19 CAR T cells. In summary, bispecifics represent a novel, highly effective immunotherapy for the treatment of lymphomas with a very favourable toxicity profile.


Subject(s)
Immunotherapy, Adoptive , Humans , Immunotherapy, Adoptive/adverse effects , T-Lymphocytes/immunology , Immunotherapy/methods , Lymphoma, B-Cell/therapy , Lymphoma, B-Cell/immunology , Antibodies, Bispecific/therapeutic use , Lymphoma, Large B-Cell, Diffuse/therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Antigens, CD19/immunology
9.
BMC Med Genomics ; 17(1): 105, 2024 Apr 25.
Article in English | MEDLINE | ID: mdl-38664735

ABSTRACT

BACKGROUND: Research on the fatty acid metabolism related gene SLC27A2 is currently mainly focused on solid tumors, and its mechanism of action in hematological tumors has not been reported. METHOD: This study aims to explore the pathological and immune mechanisms of the fatty acid metabolism related gene SLC27A2 in hematological tumors and verify its functional role in hematological tumors through cell experiments to improve treatment decisions and clinical outcomes of hematological tumors. RESULT: This study identified the fatty acid metabolism related gene SLC27A2 as a common differentially expressed gene between DLBCL and AML. Immune microenvironment analysis showed that SLC27A2 was significantly positively correlated with T cell CD4 + , T cell CD8 + , endothelial cells, macrophages, and NK cells in DLBCL. In AML, there is a significant negative correlation between SLC27A2 and B cells, T cell CD8 + , and macrophages. SLC27A2 participates in the immune process of hematological tumors through T cell CD8 + and macrophages. The GESA results indicate that high expression of SLC27A2 is mainly involved in the fatty acid pathway, immune pathway, and cell cycle pathway of DLBCL. The low expression of SLC27A2 is mainly involved in the immune pathway of AML. Therefore, SLC27A2 is mainly involved in the pathological mechanisms of hematological tumors through immune pathways, and cell experiments have also confirmed that SLC27A2 is involved in the regulation of DLBCL cells. CONCLUSION: In summary, our research results comprehensively report for the first time the mechanism of action of SLC27A2 in the immune microenvironment of DLBCL and AML, and for the first time verify the cycle and apoptotic effects of the fatty acid related gene SLC27A2 in DLBCL cells through cell experiments. Research can help improve the treatment of AML and DLBCL patients.


Subject(s)
Cell Cycle , Lymphoma, Large B-Cell, Diffuse , Tumor Microenvironment , Humans , Lymphoma, Large B-Cell, Diffuse/genetics , Lymphoma, Large B-Cell, Diffuse/immunology , Lymphoma, Large B-Cell, Diffuse/pathology , Tumor Microenvironment/immunology , Biomarkers, Tumor/genetics , Biomarkers, Tumor/metabolism , Gene Expression Regulation, Neoplastic , Hematologic Neoplasms/genetics , Hematologic Neoplasms/immunology , Hematologic Neoplasms/pathology , Cell Line, Tumor , Leukemia, Myeloid, Acute/genetics , Leukemia, Myeloid, Acute/immunology , Leukemia, Myeloid, Acute/pathology , Leukemia, Myeloid, Acute/metabolism , Fatty Acids/metabolism
10.
Sci Rep ; 14(1): 9571, 2024 04 26.
Article in English | MEDLINE | ID: mdl-38671086

ABSTRACT

Primary vitreoretinal lymphoma (PVRL) is a rare subtype of DLBCL and can progress into primary central nervous system lymphoma (PCNSL). To investigate the role of chronic antigenic stimulation in PVRL, we cloned and expressed B-cell receptors (BCR) from PVRL patients and tested for binding against human auto-antigens. SEL1L3, a protein with multiple glycosylation sites, was identified as the BCR target in 3/20 PVRL cases. SEL1L3 induces proliferation and BCR pathway activation in aggressive lymphoma cell lines. Moreover, SEL1L3 conjugated to a toxin killed exclusively lymphoma cells with respective BCR-reactivity. Western Blot analysis indicates the occurrence of hyper-N-glycosylation of SEL1L3 at aa 527 in PVRL patients with SEL1L3-reactive BCRs. The BCR of a PVRL patient with serum antibodies against SEL1L3 was cloned from a vitreous body biopsy at diagnosis and of a systemic manifestation at relapse. VH4-04*07 was used in both lymphoma manifestations with highly conserved CDR3 regions. Both BCRs showed binding to SEL1L3, suggesting continued dependence of lymphoma cells on antigen stimulation. These results indicate an important role of antigenic stimulation by post-translationally modified auto-antigens in the genesis of PVRL. They also provide the basis for a new treatment approach targeting unique lymphoma BCRs with ultimate specificity.


Subject(s)
Receptors, Antigen, B-Cell , Humans , Receptors, Antigen, B-Cell/metabolism , Glycosylation , Cell Line, Tumor , Retinal Neoplasms/genetics , Retinal Neoplasms/metabolism , Retinal Neoplasms/pathology , Retinal Neoplasms/immunology , Autoantigens/immunology , Autoantigens/metabolism , Lymphoma, Large B-Cell, Diffuse/genetics , Lymphoma, Large B-Cell, Diffuse/immunology , Lymphoma, Large B-Cell, Diffuse/pathology , Lymphoma, Large B-Cell, Diffuse/metabolism , Female , Male , Vitreous Body/metabolism , Vitreous Body/pathology , Middle Aged , Aged
11.
Int Immunopharmacol ; 133: 112014, 2024 May 30.
Article in English | MEDLINE | ID: mdl-38615378

ABSTRACT

BACKGROUND: Refractoriness and relapse after chimeric antigen receptor T-cell therapy have emerged as major challenges for immunotherapy of aggressive large B-cell lymphoma. Thus far, there is no consensus on how to address treatment failure and whether to administer maintenance therapy following CAR-T cell therapy. METHODS: From August 2017 through November 2022, 52 patients with refractory/relapsed aggressive LBCL who had a high risk of resistance to CAR-T cell therapy were given chidamide in combination with a PD-1 inhibitor as maintenance therapy following either CAR19/22 T-cell cocktail therapy or CAR19/22 T-cell cocktail therapy plus autologous stem cell transplantation (ASCT). Another 52 aggressive LBCL patients who had comparable baseline characteristics and received similar therapeutic regimens but did not receive any interventions following CAR-T cell therapy or CAR-T cell therapy plus ASCT were regarded as the control group to evaluate the efficacy and safety of the combination of chidamide and a PD-1 inhibitor. RESULTS: Among the 52 patients who received chidamide and a PD-1 inhibitor as maintenance therapy, with a median follow-up of 26.5 months (range: 1.1-53.8), neither the median progression-free survival (PFS) nor overall survival (OS) was reached, and the expected 2-year OS and PFS rates were 89 % and 77 %, respectively, which were superior to those of the control group (p < 0.001). Long-term chidamide administration and a specific genetic subtype of EZB were strongly associated with a better response after chidamide plus PD-1 blockade therapy. Additionally, long-term chidamide administration was significantly associated with prolonged persistence and reactivation of CD19-directed CAR-T cells in the peripheral blood. Adverse effects (AEs) were moderate and reversible, and no treatment-related deaths occurred. CONCLUSION: Our results indicate that the combination of chidamide and PD-1 blockade as maintenance therapy could improve the outcomes of aggressive LBCL patients at high risk of failing CAR-T cell therapy.


Subject(s)
Aminopyridines , Benzamides , Immune Checkpoint Inhibitors , Immunotherapy, Adoptive , Lymphoma, Large B-Cell, Diffuse , Programmed Cell Death 1 Receptor , Humans , Male , Female , Middle Aged , Immunotherapy, Adoptive/methods , Benzamides/therapeutic use , Aminopyridines/therapeutic use , Lymphoma, Large B-Cell, Diffuse/therapy , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Lymphoma, Large B-Cell, Diffuse/mortality , Programmed Cell Death 1 Receptor/antagonists & inhibitors , Adult , Immune Checkpoint Inhibitors/therapeutic use , Immune Checkpoint Inhibitors/adverse effects , Aged , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Receptors, Chimeric Antigen/immunology
13.
J Vet Intern Med ; 38(3): 1666-1674, 2024.
Article in English | MEDLINE | ID: mdl-38662527

ABSTRACT

BACKGROUND: To explore the safety and utility of combining low dose single-agent doxorubicin with a canine specific anti-CD20 monoclonal antibody (1E4-cIgGB) in client owned dogs with untreated B-cell lymphoma. ANIMALS: Forty-two client-owned dogs with untreated B-cell lymphoma. METHODS: A prospective, single arm, open label clinical trial of dogs with B-cell lymphoma were enrolled to receive 1E4-cIgGB and doxorubicin in addition to 1 of 3 immunomodulatory regimens. B-cell depletion was monitored by flow cytometry performed on peripheral blood samples at each visit. RESULTS: Dogs demonstrated a statistically significant depletion in CD21+ B-cells 7 days following the first antibody infusion (median fraction of baseline at 7 days = 0.04, P < .01) that persisted throughout treatment (median fraction of baseline at 21 days = 0.01, P < .01) whereas CD5+ T-cells remained unchanged (median fraction of baseline at 7 days = 1.05, P = .88; median fraction of baselie at 7 days = 0.79, P = .42; Figure 1; Supplemental Table 3). Recovery of B-cells was delayed, with at Day 196, only 6/17 dogs (35%) remaining on the study had CD21+ counts >0.5 of baseline, indicating sustained B cell depletion at 4+ months after the final treatment. 1E4-cIgGB was well tolerated with only 1 dog exhibiting a hypersensitivity event within minutes of the last antibody infusion. CONCLUSIONS: The canine 1E4-cIgGB anti-CD20 monoclonal antibody is apparently safe when administered with doxorubicin and effectively depletes B-cells in dogs with DLBCL.


Subject(s)
Antibodies, Monoclonal , Dog Diseases , Doxorubicin , Lymphoma, Large B-Cell, Diffuse , Animals , Dogs , Dog Diseases/drug therapy , Dog Diseases/immunology , Doxorubicin/therapeutic use , Doxorubicin/pharmacology , Doxorubicin/administration & dosage , Female , Male , Lymphoma, Large B-Cell, Diffuse/veterinary , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Antibodies, Monoclonal/therapeutic use , Antibodies, Monoclonal/pharmacology , Antibodies, Monoclonal/adverse effects , Prospective Studies , B-Lymphocytes/drug effects , B-Lymphocytes/immunology , Antigens, CD20/immunology
14.
Expert Rev Anticancer Ther ; 24(6): 457-465, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38646700

ABSTRACT

INTRODUCTION: Studies have compared chimeric antigen receptor (CAR) T-cell therapies and salvage chemotherapy in relapsed/refractory large B-cell lymphoma (LBCL) patients, but further evidence of their relative effectiveness is warranted. METHODS: Our systematic review identified studies comparing efficacy and safety outcomes of axicabtagene ciloleucel (axi-cel), lisocabtagene maraleucel (liso-cel) and tisagenlecleucel (tisa-cel) trials to salvage chemotherapy cohorts in LBCL patients with ≥2 prior lines of treatment; and an extended evidence network included indirect comparisons comparing CAR T-cell therapies. We conducted network meta-analyzes using Bayesian hierarchical modeling. RESULTS: Three studies comparing ZUMA-1 (axi-cel), TRANSCEND (liso-cel) and JULIET (tisa-cel) trials to salvage chemotherapy within the SCHOLAR-1 cohort were identified. Axi-cel (odds ratio [OR]:5.63; 95% credible interval [CrI]:2.66-12.42) and liso-cel (OR:4.26; 95%CrI:2.33-7.93) showed a significant increased overall response rate compared to tisa-cel, but not to one-another. Axi-cel demonstrated significant improvements in overall survival relative to liso-cel (hazard ratio [HR]:0.54; 95%CrI:0.37-0.79) and tisa-cel (HR:0.47; 95%CrI:0.26-0.88). Higher rates of grade ≥3 neurological events were observed with axi-cel than with tisa-cel and liso-cel. CONCLUSIONS: We highlight important differences in clinical outcomes between CAR T-cell therapies. Axi-cel demonstrated improved overall survival compared to tisa-cel and liso-cel, and both axi-cel and liso-cel showed higher response rates compared to tisa-cel.


Subject(s)
Immunotherapy, Adoptive , Lymphoma, Large B-Cell, Diffuse , Network Meta-Analysis , Salvage Therapy , Humans , Bayes Theorem , Biological Products , Immunotherapy, Adoptive/methods , Immunotherapy, Adoptive/adverse effects , Lymphoma, Large B-Cell, Diffuse/therapy , Lymphoma, Large B-Cell, Diffuse/pathology , Lymphoma, Large B-Cell, Diffuse/immunology , Receptors, Antigen, T-Cell , Receptors, Chimeric Antigen/immunology , Salvage Therapy/methods
15.
Mol Ther ; 32(5): 1252-1265, 2024 May 01.
Article in English | MEDLINE | ID: mdl-38504519

ABSTRACT

Chimeric antigen receptor (CAR) T cell therapy has made great progress in treating lymphoma, yet patient outcomes still vary greatly. The lymphoma microenvironment may be an important factor in the efficacy of CAR T therapy. In this study, we designed a highly multiplexed imaging mass cytometry (IMC) panel to simultaneously quantify 31 biomarkers from 13 patients with relapsed/refractory diffuse large B cell lymphoma (DLBCL) who received CAR19/22 T cell therapy. A total of 20 sections were sampled before CAR T cell infusion or after infusion when relapse occurred. A total of 35 cell clusters were identified, annotated, and subsequently redefined into 10 metaclusters. The CD4+ T cell fraction was positively associated with remission duration. Significantly higher Ki67, CD57, and TIM3 levels and lower CD69 levels in T cells, especially the CD8+/CD4+ Tem and Te cell subsets, were seen in patients with poor outcomes. Cellular neighborhood containing more immune cells was associated with longer remission. Fibroblasts and vascular endothelial cells resided much closer to tumor cells in patients with poor response and short remission after CAR T therapy. Our work comprehensively and systematically dissects the relationship between cell composition, state, and spatial arrangement in the DLBCL microenvironment and the outcomes of CAR T cell therapy, which is beneficial to predict CAR T therapy efficacy.


Subject(s)
Immunotherapy, Adoptive , Lymphoma, Large B-Cell, Diffuse , Receptors, Chimeric Antigen , Single-Cell Analysis , Tumor Microenvironment , Humans , Immunotherapy, Adoptive/methods , Tumor Microenvironment/immunology , Lymphoma, Large B-Cell, Diffuse/therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Single-Cell Analysis/methods , Receptors, Chimeric Antigen/metabolism , Receptors, Chimeric Antigen/immunology , Female , Male , Treatment Outcome , Middle Aged , Adult , Biomarkers, Tumor , Aged
16.
Virchows Arch ; 484(4): 657-676, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38462571

ABSTRACT

BCL6-rearrangement (BCL6-R) is associated with a favorable prognosis of follicular lymphoma (FL), but the mechanism is unknown. We analyzed the clinicopathological, immune microenvironment (immune checkpoint, immuno-oncology markers), and mutational profiles of 10 BCL6-R-positive FL, and 19 BCL6-R-positive diffuse large B-cell lymphoma (DLBCL) cases (both BCL2-R and MYC-R negative). A custom-made panel included 168 genes related to aggressive B-cell lymphomas and FL. FL cases were nodal, histological grade 3A in 70%, low Ki67; and had a favorable overall and progression-free survival. DLBCL cases were extranodal in 60%, IPI high in 63%, non-GCB in 60%, EBER-negative; and had a progression-free survival comparable to that of DLBCL NOS. The microenvironment had variable infiltration of M2-like tumor-associated macrophages (TAMs) that were CD163, CSF1R, LAIR1, PD-L1, and CD85A (LILRB3) positive; but had low IL10 and PTX3 expression. In comparison to FL, DLBCL had higher TAMs, IL10, and PTX3 expression. Both lymphoma subtypes shared a common mutational profile with mutations in relevant pathogenic genes such as KMT2D, OSBPL10, CREBBP, and HLA-B (related to chromatin remodeling, metabolism, epigenetic modification, and antigen presentation). FL cases were characterized by a higher frequency of mutations of ARID1B, ATM, CD36, RHOA, PLOD2, and PRPRD (p < 0.05). DLBCL cases were characterized by mutations of BTG2, and PIM1; and mutations of HIST1H1E and MFHAS1 to disease progression (p < 0.05). Interestingly, mutations of genes usually associated with poor prognosis, such as NOTCH1/2 and CDKN2A, were infrequent in both lymphoma subtypes. Some high-confidence variant calls were likely oncogenic, loss-of-function. MYD88 L265P gain-of-function was found in 32% of DLBCL. In conclusion, both BCL6-R-positive FL and BCL6-R-positive DLBCL had a common mutational profile; but also, differences. DLBCL cases had a higher density of microenvironment markers.


Subject(s)
Biomarkers, Tumor , Lymphoma, Follicular , Lymphoma, Large B-Cell, Diffuse , Mutation , Proto-Oncogene Proteins c-bcl-6 , Tumor Microenvironment , Humans , Lymphoma, Large B-Cell, Diffuse/genetics , Lymphoma, Large B-Cell, Diffuse/pathology , Lymphoma, Large B-Cell, Diffuse/immunology , Tumor Microenvironment/immunology , Tumor Microenvironment/genetics , Lymphoma, Follicular/genetics , Lymphoma, Follicular/pathology , Lymphoma, Follicular/immunology , Proto-Oncogene Proteins c-bcl-6/genetics , Male , Female , Middle Aged , Aged , Adult , Biomarkers, Tumor/genetics , Aged, 80 and over , Gene Rearrangement , DNA Mutational Analysis , Progression-Free Survival
17.
Leuk Lymphoma ; 65(6): 720-735, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38454535

ABSTRACT

Diffuse large B-cell lymphoma (DLBCL) may be cured with anti-CD20 based chemoimmunotherapy in the majority of cases, however, relapsed/refractory disease occurs in 30-40% patients, and despite significant recent therapeutic advances, continues to represent an unmet clinical need. Bispecific antibodies represent a novel class of therapy currently in development for relapsed/refractory B-cell lymphoma. This review discusses the background clinical need, mechanism of action, and clinical data including efficacy and toxicity for bispecific antibodies in DLBCL, focusing on the most advanced class in development; CD20 targeting T-cell engaging antibodies. Emerging possibilities for future use of bispecific antibodies is also discussed, including novel and cytotoxic combination regimens in relapsed and first-line settings.


Subject(s)
Antibodies, Bispecific , Lymphoma, Large B-Cell, Diffuse , Humans , Antibodies, Bispecific/therapeutic use , Antibodies, Bispecific/pharmacology , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Drug Resistance, Neoplasm/immunology , Antineoplastic Agents, Immunological/therapeutic use , Antineoplastic Agents, Immunological/adverse effects , Neoplasm Recurrence, Local/immunology , Neoplasm Recurrence, Local/drug therapy , Treatment Outcome , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Antineoplastic Combined Chemotherapy Protocols/adverse effects
19.
Clin Lymphoma Myeloma Leuk ; 24(5): 316-322, 2024 May.
Article in English | MEDLINE | ID: mdl-38342727

ABSTRACT

BACKGROUND: We investigate the geographical and racial disparities in accessing CAR-T and bispecific antibodies trials for DLBCL. MATERIALS AND METHODS: ClinicalTrials.gov was searched, and 75 trials with at least 1 open site in the US were included. 2020 US Census Bureau data was used to obtain data on race and ethnicity. SPSS version 26 was used for analysis. RESULTS: There were 62 CAR-T and 13 bispecific antibodies trials with 6221 enrolled or expected to enroll patients. Eighty-five percent of the clinical trials were only open in the US, and the majority 64% were pharmaceutical-funded. There were 126 unique study sites distributed over 31 states with 11 (0-51) mean number of trials per state and 4.5 (1-26) and 4.4 (1-24) mean number of CAR-T and bispecific antibodies trials per site, respectively. Southern states had the most number of trials 31%, followed by Midwestern 25%, Northeastern 24%, and Western 20%. The highest number of study locations were in California 13, New York 9, and Pennsylvania 9, while the highest number of open studies were in California 51, Texas 32, and New York 23. Twenty states had no open CAR-T or bispecific antibodies trials. Only 33% of African Americans (AA) lived in a county with a trial, and 7 out of 10 states with the highest proportion of AA residents (18.6%-41.4%) have no or less than 4 trial sites. Of the 62 counties analyzed, 92% were White predominant, while only 8% were AA predominant (P = .009). CONCLUSIONS: Strategies should be framed to address the observed disparities and to improve access.


Subject(s)
Antibodies, Bispecific , Lymphoma, Large B-Cell, Diffuse , Humans , Antibodies, Bispecific/therapeutic use , Lymphoma, Large B-Cell, Diffuse/therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Clinical Trials as Topic , Receptors, Chimeric Antigen/therapeutic use , Receptors, Chimeric Antigen/immunology , Healthcare Disparities/statistics & numerical data , United States , Immunotherapy, Adoptive/methods , Health Services Accessibility/statistics & numerical data
20.
Clin. transl. oncol. (Print) ; 26(2): 515-523, feb. 2024.
Article in English | IBECS | ID: ibc-230195

ABSTRACT

Background Geriatric nutritional risk index (GNRI) on the prognosis of patients with diffuse large B-cell lymphoma (DLBCL) remains unclear. The purpose of this meta-analysis was to discuss the value of the GNRI in evaluating long-term outcomes in DLBCL. Methods We systematically and roundly retrieved PubMed, Cochrane Library, Embase, Scopus and Web of Science electronic databases from inception of the databases to March 20, 2023. At the same time, we calculated the pool hazard ratios (HRs) with their 95% confidence interval (CI) for overall survival and progression-free survival to assess the effect of GNRI on the prognosis of DLBCL patients. Results In our primary meta-analysis, 7 trials with a total of 2448 patients were enrolled. Results showed that lower level of GNRI was related to poorer overall survival (HR = 1.78, 95% CI 1.27, 2.50, p < 0.01) and worse progression-free survival (HR = 2.31, 95% CI 1.71, 3.13, p < 0.01) in DLBCL patients. Conclusion The results of our meta-analysis indicate that a lower GNRI significantly associated with poorer prognosis for DLBCL. It is believed that GNRI was a promisingly predictive indicator of survival outcomes in DLBCL patients. However, large multicenter prospective studies are necessary to verify the results (AU)


Subject(s)
Humans , Lymphoma, Large B-Cell, Diffuse/drug therapy , Lymphoma, Large B-Cell, Diffuse/immunology , Prospective Studies , Multicenter Studies as Topic , Nutritional Status , Prognosis
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