scholarly journals The Safety of an Adjuvanted Autologous Cancer Vaccine Platform in Canine Cancer Patients

2018 ◽  
Vol 5 (4) ◽  
pp. 87 ◽  
Author(s):  
Chris Weir ◽  
Annika Oksa ◽  
Jennifer Millar ◽  
Miles Alexander ◽  
Nicola Kynoch ◽  
...  
Keyword(s):  
Adverse Reactions ◽  
Tumor Antigens ◽  
Autologous Tumor ◽  
Tumor Vaccines ◽  
Vaccine Platform ◽  
Safety Study ◽  
Diverse Range ◽  
Canine Cancer ◽  
Ongoing Development ◽  
Vaccine Approach

Canine cancer rates are similar to humans, though the therapeutic options might be limited. Inducing a patient’s own immune system to have an anti-tumor response is an attractive approach to cancer therapy. In this safety study, autologous tumor vaccines produced specifically for each canine patient were combined with Advax™, a novel non-inflammatory immunomodulator and vaccine adjuvant and were tested for safety in a diverse range of patient presentations alone or in combination with other treatments. Canine patients had their tumor biopsied, debulked or resected and the tumor antigens were processed into an autologous vaccine formulated with Advax™ adjuvant with or without rhizavidin as an additional immune stimulant. Patients treated early in the trial received two intramuscular (IM) doses, 2 weeks apart. As the study progressed and no issues of safety were observed, the protocol was changed to weekly vaccinations for 4 weeks followed by monthly booster shots. Over the 150 I.M injections delivered to date, the vaccine was found to be very safe and no significant adverse reactions were observed. These results justify ongoing development and future controlled studies of this autologous vaccine approach.

scholarly journals Autologous tumor antigens and boron nanosheet-based nanovaccines for enhanced photo-immunotherapy against immune desert tumors

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhe Sun ◽  
Taojian Fan ◽  
Quan Liu ◽  
Luodan Huang ◽  
Weibin Hu ◽  
...  
Keyword(s):  
Immune Cells ◽  
Tumor Antigens ◽  
Photoacoustic Imaging ◽  
Metastatic Potential ◽  
Photothermal Effect ◽  
Patient Specific ◽  
Autologous Tumor ◽  
Tumor Vaccines ◽  
Therapeutic Vaccines ◽  
Important Field

Abstract Personalized therapeutic vaccines against immune desert tumors are an increasingly important field in current cancer immunotherapy. However, limitations in neoantigen recognition, impotent immune cells, and a lack of intratumoral infiltrated lymphocytes pose challenges for the cancer vaccines. Resected tumors contain various of patient-specific tumor autoantigens (TA), and its derived photonanovaccines have unique competency to overcome abovementioned barriers. We constructed a novel personalized photonanovaccine (B@TA-R848) with surgically sourced TA modified on two-dimensional boron nanosheets (BNSs) via polydopamine coating and loaded with immune adjuvant R848. B@TA-R848 has good properties of drug delivery and release, photoacoustic imaging, photothermal effect, and biocompatibility. In a mouse triple-negative breast cancer model, B@TA-R848-based photonanovaccine induced effective systemic antitumor immune responses, altered the local tumor microenvironment, and increased the intratumoral infiltration of immune cells. The combined photo immunotherapy could significantly inhibit tumor growth, recurrence, and metastasis. This work develops a novel photonanovaccine for low immunogenicity and high metastatic potential tumors, which is of great significance for exploring the clinical development of personalized tumor vaccines against immune desert tumors.

Immunotherapy of Chronic Lymphocytic Leukemia using CD40L and IL2 Expressing Autologous Tumor Cells.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 768-768 ◽  
Author(s):  
Ettore Biagi ◽  
Uday Popat ◽  
Rousseau Raphael ◽  
Yvon Eric ◽  
Dotti Giampietro ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Lymphocytic Leukemia ◽  
Tumor Cells ◽  
Tumor Antigens ◽  
Cd40 Ligand ◽  
Lymphocytic Leukemia ◽  
Autologous Tumor ◽  
Tumor Vaccines ◽  
Cd40 Stimulation ◽  
Pre Treatment

Abstract Transgenic human CD40 ligand (hCD40L) activates B-Chronic Lymphocytic Leukemia (B-CLL) cells by CD40 stimulation and may thereby enhance their capacity to present tumor antigens. Pre-clinical models show that co-expression of IL-2 further potentiates the immunogenicity of CD40L-expressing tumor cells. To discover whether these promising pre-clinical data could usefully be applied to patients with B-CLL, we used adenovectors to prepare hIL2- and hCD40L-expressing autologous tumor vaccines. Within these vaccines, a mean of 92% B-CLL cells were CD40L positive (versus <1% pre-treatment), and costimulatory molecules were also upregulated on the tumor cells (CD80 from 6% to 74% and CD86 from 16% to 73% positive cells). The mean secretion of IL-2 (measured by ELISA at 72 hours after transduction) was 1,780 pg/ml/10E6 cells (range = 175–400). To date, 8 patients have received between 5 and 8 subcutaneous injections in a modified Phase I design, in which the dose of IL-2 secreting cells was fixed at 2x10E7 per injection, while the dose of CD40L-expressing leukemia cells was escalated from 2x10E5 (level 1) to 2x10E7 (level 3) per injection. 12 additional patients will receive this final dose combination. Of those treated, two patients were in Rai stage 4; 2 in stage 3; 2 in stage 2; and 2 in stage 1. There were no adverse events from any injection in the patients. Injection-site biopsies revealed a modest infiltration of CD3+ cells, and the vaccine also had systemic immunomodulatory effects. Total T-cell numbers were significantly increased in only 2 patients, but an anti-B-CLL immune response was detected in 5/6 individuals currently analyzed. Using ELISPOT assays with autologous B-CLL cells as stimulators, and allogeneic B-CLL cells as controls, we found a rise in IFN-gamma spot-forming T-cells (<1/100,000 pre to >1/1500 post vaccination) and of Granzyme-B expressing T-cells (<1/100,000 pre to >1/2500 post). This reactivity is mediated at least in part by CD8-positive T cells with specificity to survivin, a known B-CLL associated tumor antigen. Although these immunologic effects have as yet been accompanied by only transient disease responses, our continuing accrual of additional patients who will receive immunomodulatory doses of vaccine should indicate whether the approach could contribute to the management of early or advanced B-CLL.

scholarly journals Therapeutic Cancer Vaccination with Immunopeptidomics-Discovered Antigens Confers Protective Antitumor Efficacy

Cancers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 3408
Author(s):  
Karita Peltonen ◽  
Sara Feola ◽  
Husen M. Umer ◽  
Jacopo Chiaro ◽  
Georgios Mermelekas ◽  
...  
Keyword(s):  
Tumor Antigens ◽  
Endogenous Retrovirus ◽  
Peptide Ligands ◽  
Tumor Control ◽  
Preclinical Model ◽  
Vaccine Platform ◽  
Therapeutic Cancer Vaccine ◽  
Mhc I ◽  
Specific Tumor ◽  
Therapeutic Cancer Vaccines

Knowledge of clinically targetable tumor antigens is becoming vital for broader design and utility of therapeutic cancer vaccines. This information is obtained reliably by directly interrogating the MHC-I presented peptide ligands, the immunopeptidome, with state-of-the-art mass spectrometry. Our manuscript describes direct identification of novel tumor antigens for an aggressive triple-negative breast cancer model. Immunopeptidome profiling revealed 2481 unique antigens, among them a novel ERV antigen originating from an endogenous retrovirus element. The clinical benefit and tumor control potential of the identified tumor antigens and ERV antigen were studied in a preclinical model using two vaccine platforms and therapeutic settings. Prominent control of established tumors was achieved using an oncolytic adenovirus platform designed for flexible and specific tumor targeting, namely PeptiCRAd. Our study presents a pipeline integrating immunopeptidome analysis-driven antigen discovery with a therapeutic cancer vaccine platform for improved personalized oncolytic immunotherapy.

scholarly journals Combination of a Sindbis-SARS-CoV-2 spike vaccine and αOX40 antibody elicits protective immunity against SARS-CoV-2 induced disease and potentiates long-term SARS-CoV-2-specific humoral and T-cell immunity

2021 ◽  
Author(s):  
Antonella Scaglione ◽  
Silvana Opp ◽  
Alicia Hurtado ◽  
Christine Pampeno ◽  
Ziyan Lin ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Protective Immunity ◽  
T Cell Response ◽  
Spike Protein ◽  
Effector Memory ◽  
World Population ◽  
Vaccine Platform ◽  
Vaccine Approach

The COVID-19 pandemic caused by the coronavirus SARS-CoV-2 is a major global public threat. Currently, a worldwide effort has been mounted to generate billions of effective SARS-CoV-2 vaccine doses to immunize the world population at record speeds. However, there is still demand for alternative effective vaccines that rapidly confer long-term protection and rely upon cost-effective, easily scaled-up manufacturing. Here, we present a Sindbis alphavirus vector (SV), transiently expressing the SARS-CoV-2 spike protein (SV.Spike), combined with the OX40 immunostimulatory antibody (OX40) as a novel, highly effective vaccine approach. We show that SV.Spike plus αOX40 elicits long-lasting neutralizing antibodies and a vigorous T cell response in mice. Protein binding, immunohistochemical and cellular infection assays all show that vaccinated mice sera inhibits spike functions. Immunophenotyping, RNA Seq transcriptome profiles and metabolic analysis indicate a reprogramming of T cells in vaccinated mice. Activated T cells were found to mobilize to lung tissue. Most importantly, SV.Spike plus αOX40 provided robust immune protection against infection with authentic coronavirus in transgenic mice expressing the human ACE2 receptor (hACE2-Tg). Finally, our immunization strategy induced strong effector memory response, potentiating protective immunity against re-exposure to SARS-CoV-2 spike protein. Our results show the potential of a new Sindbis virus-based vaccine platform to counteract waning immune response that can be used as a new candidate to combat SARS-CoV-2. Given the strong T cell responses elicited, our vaccine is likely to be effective against variants that are proving challenging, as well as, serve as a platform to develop a broader spectrum pancoronavirus vaccine. Similarly, the vaccine approach is likely to be applicable to other pathogens.

scholarly journals ATIM-13. MULTIMODAL IMMUNOTHERAPY WITH IO-VAC® FOR PATIENTS WITH GBM: A SINGLE INSTITUTION EXPERIENCE

2019 ◽  
Vol 21 (Supplement_6) ◽  
pp. vi4-vi4
Author(s):  
Stefaan Van Gool ◽  
Jennifer Makalowski ◽  
Wilfried Stuecker
Keyword(s):  
Tumor Antigens ◽  
Residual Disease ◽  
Local Therapy ◽  
Autologous Tumor ◽  
Line Treatment ◽  
First Line ◽  
Advanced Therapy Medicinal Product ◽  
Advanced Therapy ◽  
First Line Treatment

Abstract Multimodal immunotherapy (Newcastle Disease Virus (NDV) + modulated electrohyperthermia + IO-VAC® + immunomodulatory strategies) is an innovative treatment for primary GBM and might prolong overall survival (OS). IO-VAC® consists of DCs loaded with autologous tumor antigens and matured with cytokine cocktail and NDV. We retrospectively reviewed 132 cases of primary GBM. Multimodal immunotherapy was integrated as individualized treatment approach and following different scenario’s in combination with standard treatment in the first line treatment in 71 patients, used at time of first or subsequent relapse as treatment with or without chemotherapy in 61 cases. Median ages were resp. 55 and 53 y. Median KPI at start of immunotherapy was 90 and 80. Median OS for the patients treated with immunotherapy as part of first-line treatment was 20 months with 2-y OS of 40% (CI95%: -13,+13). Median OS for patients treated at time of relapse was 7 months with but still with 18-m OS of 16% (CI95%: -12,+9). Two resp. 1 patients were lost of follow up. A subgroup of 34 GBM patients (10 females) with median age 58y (20–67) was detected, who received NDV + modulated electrohyperthermia during Temozolomide maintenance cycles followed by two IO-VAC® DC vaccinations, and further NDV + modulated electrohyperthermia courses. Median KPI was 70 (60–100). MGMT status was methylated (12), unmethylated (13), unknown (9). Median OS for this subgroup was 23.4 months with 2-year OS of 48% (CI95%: -18,+20). Immunotherapy was feasible without immunotherapy-related side effects of grade III or more. The data suggest that multimodal immunotherapy with IO-VAC® already during and after maintenance chemotherapy, at time of achieved minimal residual disease with local therapy, might help in prolongation of OS. Prolongation of OS in a small group of patients at time of relapse was also demonstrated. IO-VAC® is an approved advanced therapy medicinal product (DE-NW-04-GMP-2015-0030).

Various Approaches with Autologous Tumor Vaccines.

2003 ◽  
Vol 96 (Supplement) ◽  
pp. S6
Author(s):  
E. G. Elias ◽  
J. L. Zapas ◽  
S. L. Beam ◽  
S. D. Brown ◽  
B. S. Gentile ◽  
...  
Keyword(s):  
Autologous Tumor ◽  
Tumor Vaccines

Novel OK-432-conjugated Tumor Vaccines Induce Tumor-specific Immunity against Murine Tongue Cancer

2003 ◽  
Vol 82 (8) ◽  
pp. 636-640
Author(s):  
X. Li ◽  
H. Bukawa ◽  
M. Hirota ◽  
Y. Tsuyuki ◽  
S. Omura ◽  
...  
Keyword(s):  
Tumor Antigens ◽  
Tongue Cancer ◽  
Cytolytic Activity ◽  
Cancer Model ◽  
Tumor Vaccines ◽  
Antitumor Effects ◽  
Growth And Survival ◽  
Specific Immunity ◽  
Streptococcal Preparation ◽  
Histological Results

Priming with tumor antigens is one of the most important strategies in cancer immunotherapy. To enhance tumor antigenicity, OK-432, a streptococcal preparation, was coupled to squamous cell carcinoma (KLN-205) by means of a 0.2% glutaraldehyde method. The purpose of this study was to investigate whether OK-432-conjugated tumor vaccines could induce tumor-specific immunity. Our originally developed mouse tongue cancer model was used throughout this work for the analysis of antitumor effects. Prepared OK-432-conjugated KLN-205 vaccines were immunized 3 times to DBA/2 mice. The results showed that the KLN-205 vaccines induced cytolytic activity and strongly suppressed both KLN-205 tumor incidence and growth, and survival of the mice was improved. Moreover, the histological results showed that a greater number of lymphocytes had infiltrated around tumor cells by 24 hours after tumor inoculation in the vaccine group. These results suggest that immunizations with KLN-205 vaccines increase the antitumor effects against tongue cancer.

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