Phase I Trial of a Novel Intradermal Idiotype Vaccine in Patients with Advanced B-Cell Lymphoma: Specific Immune Responses Despite Profound Immunosuppression
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Research Article Phase I Trial of a Novel Intradermal Idiotype Vaccine in Patients with Advanced B-Cell Lymphoma: Specific Immune Responses Despite Profound Immunosuppression Cristina Bertinetti,1 Katja Zirlik,1 Kristina Heining-Mikesch,1 Gabriele Ihorst,2 Heide Dierbach,1 Cornelius F.Waller, 1 and Hendrik Veelken1 1Department of Hematology/Oncology and 2Center of Clinical Trials, Freiburg University Medical Center, Freiburg, Germany Abstract tic anti-lymphoma immunity in animal models (1–4). Depending on The immunoglobulin receptor of B-cell lymphomas constitutes the tumor model and the vaccine formulation, both cellular and humoral immunity may play a role in tumor rejection (5–7). a specific tumor antigen (idiotype) and a target for active immunotherapy. Encouraging results have been reported in Idiotype-specific immune responses and disappearance of phase II trials after s.c. vaccination of follicular lymphoma minimal residual disease (MRD) have been observed after idiotype patients during clinical remission with idiotype produced from immunization in follicular lymphoma patients during clinical eukaryotic cell lines and coupled to an immunogenic carrier remission (8–11). Induction of immunity was associated with macromolecule. We have developed a good manufacturing superior outcome (9, 12). Some objective tumor regressions upon protocol for rapid expression of idiotype vaccines as recombi- idiotype vaccination have also been reported (8, 13, 14). nant Fab fragments in Escherichia coli. The objectives of this With the exception of multiple myeloma and Waldenstrom’s trial were to show safety and feasibility of intradermal macrogobulinemia, where soluble idiotype protein may by purified immunization with this vaccine and to investigate whether from the patient’s serum (15, 16), idiotype vaccines from non- immune responses were induced by this immunization route. secreting lymphomas must be manufactured. Viable lymphoma cells Patients (n = 18) with advanced B-cell malignancies received from a biopsy may be fused with a myeloma cell line by somatic cell repetitive intradermal vaccinations with 0.5 to 1.65 mg hybridization followed by purification of idiotype from the culture supernatant of the resulting heterohybridoma (17). Several strategies recombinant idiotype Fab fragment mixed with lipid-based adjuvant in combination with 150 Mg granulocyte macrophage for production of recombinant idiotype protein in eukaryotic cells colony-stimulating factor s.c. at the same location. The with an appropriate expression system have been proposed (i.e., patients’ immune status was assessed by flow cytometry of expression as an IgG3 in a murine lymphoma cell line, as IgG1 in sf9 peripheral blood lymphocytes and concomitant hepatitis B insect cells, and as scFv fragment in tobacco plants; ref. 18). In vaccination. Cellular and humoral immune responses to the almost all reported clinical trials with these vaccines, the weakly vaccine were assessed by enzyme-linked immunospot and immunogenic idiotype protein was covalently coupled to the potent ELISA. Side effects of a total of 65 vaccinations were mild and immunogenic carrier molecule keyhole limpet hemocyanin (KLH). did not affect the immunization schedule. No patient developed To ease manufacturing of individual idiotype vaccines and to hepatitis B surface antibodies (anti-HBs) after two hepatitis B shorten production times, we have adapted a bacterial expression system for recombinant immunoglobulin Fab fragments to the immunizations. Of 17 evaluable patients, five developed Escherichia coli specific anti-vaccine antibodies, and eight developed anti-Fab production of recombinant idiotype vaccines in T-cell responses. T-cell reactivity was independent of the (19, 20). Stimulation of peripheral blood T cells from lymphoma cellular immune status and was idiotype specific as shown patients with such recombinant, lymphoma-derived Fab fragment by statistical regression analysis (P = 0.0024) and epitope resulted in specific, MHC class I–restricted cytotoxic activity mapping studies. Intradermal administration of uncoupled against autologous, idiotype-expressing target cells (21). Because coupling rates to KLH were too variable to fulfill good recombinant idiotype with appropriate adjuvants may over- 3 come profound clinical immunosuppression and induce manufacturing (GMP) criteria, we decided to test alternative specific immune responses. (Cancer Res 2006; 66(8): 4496-502) strategies to obtain high immunogenicity without further chemical vaccine modification. Intradermal vaccination with a reduced antigen dose has recently been shown to be equipotent to a Introduction conventional s.c. influenza vaccine, presumably due to antigen B-cell non-Hodgkin’s lymphomas (B-NHL) are clonal prolifer- delivery to professional antigen-presenting cells (APC) of the skin ations of cells expressing an identical antigen receptor. The hyper- (22). In addition, novel lipid-based adjuvants with superior variable parts of this immunoglobulin form a unique idiotype of immunogenicity, such as MF59, have been introduced into the malignant clone and represent a tumor-specific antigen. Immu- commercially available vaccines (23). Based on these advances in nization with lymphoma idiotype induces protective and therapeu- the design of vaccines against common infectious agents, we chose to apply a mixture of the recombinant idiotype with MF59 via an intradermal injection route. Because this trial tested to our Requests for reprints: Hendrik Veelken, Department of Hematology/Oncology, knowledge for the first time a drug manufactured individually Freiburg University Medical Center, Hugstetter Strasse 55, D-79106 Freiburg, Germany. in E. coli, and because significant toxicities of the intradermal Phone: 49-761-270-7176; Fax: 49-761-270-7177; E-mail: hendrik.veelken@uniklinik- freiburg.de. I2006 American Association for Cancer Research. doi:10.1158/0008-5472.CAN-05-4233 3 F. Simon, unpublished observations. Cancer Res 2006; 66: (8). April 15, 2006 4496 www.aacrjournals.org Downloaded from cancerres.aacrjournals.org on September 29, 2021. © 2006 American Association for Cancer Research. Novel Idiotype Vaccine in Advanced B-Cell Lymphoma Table 1. Patient characteristics, vaccinations, immunologic responses, and time to progression Patient Diagnosis, Gammopathy Prior treatment Prior immunotoxic Time last Remission status c stage* regimens therapy therapy/vaccination (mo) at vaccination A05 FL, IV — 6 F, R 2 >2nd PR A15 FL, IV — 1 — 13 PD A25 CLL, III — 9 F 21 PD A03 LPL, IV — 6 autoSCT, R 8 PD A26 MCL, IV — 2 — 73 PD A27 FL, IV — 7 autoSCT, R, F 1 >2nd PR A28 DLCL, III — 3 R 2 >2nd PR A51 MM, III IgGn 5 autoSCT 6 PD A83 CLL, IV — 4 autoSCT 1 PD A21 MCL, IV — 2 R 9 PD A32 MCL, IV — 1 — 43 PD A55 MM, II IgGn 4 autoSCT 4 2nd PR A60 LPL, IV IgMn 2 F 6 2nd PR A73 FL, III — 4 autoSCT, F 4 >2nd PR A75 MM IgGn 4 autoSCT 12 PD A82 FL, IV — 5 F 6 PD B07 CLL, III — 10 F, R, alloSCT 2 PD A88 CLL, III — 2 F 21 PD Abbreviations: FL, follicular lymphoma; MM, multiple myeloma; MCL, mantle cell lymphoma; LPL, lymphoplasmocytic lymphoma; DLCL, diffuse large cell lymphoma; F, fludarabine; R, rituximab; autoSCT, autologous hematopoietic stem cell transplantation; alloSCT, allogeneic SCT; PD, progressive disease; PR, partial remission; NS, not significant; ND, not done; NA, not applicable due to early disease progression; RF, rheumatoid factor. *Staging system applied: CLL, Rai; MM, Durie and Salmon; all other lymphoma types, Ann Arbor. cA complete course of radiation therapy was counted as one regimen. bThe planned dose escalation was discontinued at the third level. xNormal range for RF = 0 to 16 IU/L. k>50% cross-reactivity with control Fabs. {Patient with preexisting seropositive rheumatoid arthritis. formulation could not be excluded, we conducted a clinical phase I Treatment schedule. One vaccination consisted of an intradermal trial to show feasibility and tolerability of such a vaccination and to injection of 10 Ag/AL idiotype solution mixed 5:1 (v/v) with MF59 adjuvant investigate the immunogenicity of this idiotype vaccine. (Chiron Behring, Marburg, Germany; ref. 23). The minimum dose of idiotype protein was 0.5 mg per vaccination and was planned to be increased Patients and Methods according to the modified Fibonacci design after treatment of three patients at each dose level without relevant side effects. In addition, 150 Ag granu- Subject eligibility. In a typical phase I design, patients with B-cell locyte macrophage colony-stimulating factor (GM-CSF; molgramostim; malignancies in advanced stages that had relapsed or progressed after a Leucomax; Novartis, Nuernberg, Germany) were injected s.c. at the same full treatment course with anthracyclin- or fludarabine-containing or high- anatomic location. Vaccinations were given in weeks 0, 3, 5, and 9. dose chemotherapy with autologous stem cell transplantation were Beginning with the fourth patient enrolled, anti-HBs-negative patients enrolled after giving informed consent. Patients were at least 18 years received a standard hepatitis B vaccine (Gen-HB-Vax; Aventis Pasteur, old and had a life expectancy of at least 6 months. Exclusion criteria were Frankfurt, Germany) at the first and third idiotype vaccination. Staging severe concomitant illnesses or infections, active central nervous system according to National Cancer Institute criteria (24) with bidimensional involvement, and immunosuppressive or antineoplastic therapy (including measurement of lymphomatous masses or by quantitative