WO2006010838A2 - Produits contenant au moins un principe actif anticancereux peu diffusible et un principe actif immunostimulant - Google Patents
Produits contenant au moins un principe actif anticancereux peu diffusible et un principe actif immunostimulant Download PDFInfo
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- WO2006010838A2 WO2006010838A2 PCT/FR2005/001612 FR2005001612W WO2006010838A2 WO 2006010838 A2 WO2006010838 A2 WO 2006010838A2 FR 2005001612 W FR2005001612 W FR 2005001612W WO 2006010838 A2 WO2006010838 A2 WO 2006010838A2
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7088—Compounds having three or more nucleosides or nucleotides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
Definitions
- the present invention relates to products used in combination for effective treatment of tumors and more particularly metastases.
- Immunotherapy in the treatment of cancers aims to stimulate the immune system to destroy tumor cells.
- Different approaches can be used: vaccination against one or more tumor antigens, amplification of a pre-existing antitumor response (such as, for example, amplification of cytotoxic lymphocytes infiltrating the tumor), use of monoclonal antibodies directed against a tumor antigen, or dendritic cells loaded with tumor extracts or antigens (reviewed by Turtle CJ et al., Dendritic cells in tumor immunology and immunotherapy, Curr Drug Targets, 2004 5: 17-39, Chaput N et al, Exosome-based immunotherapy, Cancer Immunol Immunother 2004; 53: 234-9; Parish CR et al., Cancer immunotherapy: the past, the present and the future, Immunol Cell Biol., 2003 81: 106-13).
- amplification of a pre-existing antitumor response such as, for example, amplification of cytotoxic lymphocytes infiltrating the tumor
- Another strategy is to activate the immune system broadly to stimulate innate immunity and to initiate or amplify a specific immune response.
- immunostimulatory agents are, inter alia, bacterial extracts (Jaeckle KA et al (1990), J. Clin Oncol 8 (8) pp 1408-18), IL-2 (Herrlinger U. et al (1996), J. Neurooncol 27 (3) pp 193-203), IL-12 (Kishima H. et al (1998), Br J. Cancer 78 (4) pp 446-53 Jean WC et al (1998), Neurosurgery 42 (4) pp 850-6), bacterial DNA (MY-I) (Tokunaga T. et al (1984), MCI 72 pp 955-62), or poly (I, C) (Ewel, CH et al (1992), Cane Res 52: 3005).
- Synthetic oligodeoxynucleotides containing such motifs (CpG-ODN) retain marked immunostimulatory properties, particularly phosphorothioate ODNs that are resistant to nucleases.
- TLR9 predominates in B lymphocytes and plasmocytoid dendritic cells (pDC), whereas the expression is broader in mice including myeloid lineage and microglia [Hornung V, Rothenfusser Set al, J Immunol 2002; 168, 4531-4537].
- B cells are activated by CpG-ODN, resulting in the secretion of cytokines such as IL-6 or IL-10, cell proliferation, inhibition of apoptosis induced by various agents and secretion immunoglobulin [reviewed by Klinman DM, Nat Rev Immunol 2004; 4: 249-59; Krieg AM, Curr Oncol Rep 2004; 6: 88-95; Carpentier AF et al, Front Biosci 2003; 8: El 15-27].
- cytokines such as IL-6 or IL-10
- cell proliferation inhibition of apoptosis induced by various agents and secretion immunoglobulin
- pDCs Activation of human pDCs leads to their maturation, the secretion of many cytokines such as TNF ⁇ , interferon alpha or gamma, IL-6 or IL-12 and the expression of co-stimulatory molecules (CD40, CD80, CD86) and CCR7, a receptor controlling migration to ganglion T regions. While pDCs are directly activated by CpG-ODNs, activation of human myeloid dendritic cells appears indirect through cytokines [reviewed by Klinman DM, Nat Rev Immunol 2004; 4: 249-59; Krieg AM, Curr Oncol Rep 2004; 6: 88-95].
- Activation of monocytes by secreted cytokines can induce, among others, the secretion of CXCL10 which promotes the antitumor immune response and which also has anti-angiogenic properties (Strieter RM et al (1995), J Biol Chem, 270; -57).
- CpG-ODNs Activation of T-cells and NK cells by CpG-ODNs depends on cytokines secreted by DCs (dendritic cells) and B cells. Secretion of IL-12 and IFN gamma directs the response to the ThI profile , and can even transform a Th2 response into ThI. In addition, DCs can then activate CD8 lymphocytes independently of CD4 helper lymphocytes [reviewed by Klinman DM, Nat Rev Immunol 2004; 4: 249-59; Krieg AM, Curr Oncol Rep 2004; 6: 88-95].
- oligonucleotide The biological activity of an oligonucleotide depends on many variables, still imperfectly known, such as, for example, the nucleotide sequences surrounding the CpG motif or the number of CpG motifs. Some oligo- immunostimulatory nucleotides without CpG motifs have even been described (for example in US Application 2004-0006032).
- the chemical modification of the backbone naturally constituted in the DNA by the phophodiesters bonds (sensitive to nucleases), plays a key role both by improving the stability of the ODN but also by modifying its immunostimulatory properties.
- Several types of stabilized oligonucleotides have been created (Iyer RP (1999) Curr Opinion Mol Therap 1; 344-358).
- CpG-ODNs are phosphorothioate oligodeoxynucleotides, or mixed phosphorothioate / phosphodiester oligodeoxynucleotides (eg, phosphorothioate / phosphodiester end-points, or phosphorothioate ODNs, with the exception of cytosine-guanosine linkages which are phosphodiesters).
- the oligodeoxynucleotides synthesized can also be purified according to their stereoisomerism to modify or improve their biological activity.
- the priming of the immune response by the direct stimulation of the dendritic cells and the selection by the immune system of an ade ⁇ quat antigen with an ThI type immune response.
- the efficacy of the immune response the activation of macrophages and NK cells makes it possible to increase antitumour cytotoxicity, either directly or through antibodies (antibody-dependent cell cytotoxicity or ADCC).
- ADCC antibody-dependent cell cytotoxicity
- the generally weak expression of MHC I by the tumor cells can be induced, making them more sensitive to the cytotoxicity of the T lymphocytes.
- CNS 1 intracerebral glioma
- CNS 1 intracerebral glioma
- NK cells In vivo depletion of NK cells decreases or abolishes the anti-tumor effects of CpG-ODN [Carpentier AF, Chen L, Maltonti F, Delattre JY. Cancer Res 1999; 59, 5429-5432].
- CD8 + lymphocytes are required in most animal models, whereas CD4 cell depletion appears to have less impact [Lanuti M, Rudginsky S, Force SD, et al. Cancer Res 2000; 60, 2955-2963; Kawarada Y, Gans R, Garbi N, et al. J Immunol 2001; 167, 5247-5253].
- CpG-ODNs can also be used for the manufacture of vaccines, being very effective adjuvants with most antigens, unless these are purely polysaccharide in nature [Krieg AM. Annu Rev Immunol 2002; 20: 709-60; Krieg AM, Curr Oncol Rep 2004; 6: 88-95]. CpG-ODNs have been found to be the most effective adjuvants for the induction of cytotoxic Th1 immune responses with antigen-specific CD4 and CD8 T cells [Zwaveling S, Ferreira Mota SC, Nouta J, et al. J Immunol 2002; 169: 350-8; Miconnet I, Koenig S, Amsterdamr D, et al. J Immunol.
- CpG-ODN The direct conjugation between the antigen and the CpG-ODN makes it possible to reduce the amount of antigen required [Tighe H, Takabayashi K, Schwartz D, et al. J Allergy Clin Immunol. 2000; 106: 124-34.].
- the effectiveness of CpG-ODN is further enhanced by combination with other adjuvants such as aluminum hydroxide, QS21, MPL or GMCSF [Miconnet I, Koenig S, thoughr D, et al. CpG are effective adjuvants for specifying CTL induction against antigen-derived peptide tumor. J Immunol.
- CpG-ODN monoclonal antibodies
- ADCC antibody-mediated cytotoxicity
- PHerceptin® in breast cancers
- Rituxan® in non-Hodgkin lymphoma.
- This combination can also utilize CpG-ODN as inducers at the tumor cell level of the expression of a molecule against which a monoclonal antibody exists.
- CpG-ODN induce the expression of CD25 (IL2R) on the surface of a B lymphoma line, thus making these cells more sensitive to the action of an anti-CD25 immunotoxin [Decker T, Hipp S, Kreitman RJ, et al. Blood 2002; 99, 1320-1326].
- CpG-ODN to stimulate in vitro or in vivo dendritic cells. This stimulation can be done in combination with other immune adjuvants or cytokines, with various antigens, or tumor extracts (Krieg AM, Annu Rev Immunol 2002; 20: 709-60; Krieg AM, Curr Oncol Rep 2004; 88-95).
- TLR9 or CpG-ODN ligands for cancer immunotherapy can be combined with other therapies, including surgery, radiotherapy, chemotherapies, other immunotherapies and differentiating therapies.
- CpG-ODN activation of non-specific immunity is local and only persists for the duration of the treatment.
- the ability of CpG-ODN to induce a good specific immune response capable of acting at a distance and over time is therefore crucial for metastatic cancers. This is illustrated by the preliminary results of a clinical trial in melanomas where local responses were observed but without a distant response (no systemic effect) (Trefzer U. et al., 2 nd International Symposium "Activating immunity with CpG oligos", Amelia Island, Florida, October 7-10, 2001).
- a tumor destruction by an electrochemotherapy technique associated with a suitable stimulation of the immune system leads to an antitumor therapy with a remote effect (systemic effect) that is particularly effective, particularly as regards concerns metastases.
- the inventors have in particular found that the combination of ligands (natural or synthetic) TLR (Toll-like Receptor), in particular immunostimulatory oligodeoxynucleotides (ODN) and an optimized chemotherapy protocol makes it possible to obtain an effective action on metastases.
- ligands natural or synthetic
- TLR Toll-like Receptor
- ODN immunostimulatory oligodeoxynucleotides
- the subject of the present invention is therefore products containing at least one low-diffusible anti-cancer active ingredient and an immunostimulatory active ingredient selected from the group consisting of TLR ligands, as a combined preparation for simultaneous, separate or spread use. over time, for the treatment of benign or malignant tumors, particularly solid tumors, and more particularly metastases, in a subject suffering from a tumor and subjected to electropermeabilization at the level of said tumor.
- the electropermeabilization is performed at a healthy tissue selected appropriately.
- the combined preparation of said products further comprises antigens, for example in the form of purified antigens specific for tumor, tumor extracts, irradiated or modified tumor cells, said antigens preferably being administered locally.
- the electropermeabilization effec ⁇ killed on a healthy tissue has the advantage of locally promoting the recruitment of immune cells.
- Electrochemotherapy (Mir et al., 1991a, Belehradek et al., 1991) combines the in situ administration of non-permeant (or non-diffusible) or poorly permeable (or poorly diffusible) anti-cancer molecules and the application of impulses. permeabilizing electric.
- bleomycin a non-permeating molecule, that does not diffuse through the cell membrane, already used in conventional chemotherapy.
- ECT has been used to enhance the transfection of antisense oligonucleotides or plasmids (Ivanov MA et al., J. Mede Gene, 2003, 5, 893-899, US Patent Nos. 5,547,467, 5,749,847 and 6,763,264) or the immunostimulatory molecules such as interleukin 12 (Kishida T et al., Mol Ther, 2003, 8, 738-745),
- the electropermeabilization of cells exposed to electrical impulses is a phenomenon known for thirty years. It results from the transmembrane potential difference generated by an external electric field on the surface of the cells exposed to this field. When this transmembrane potential difference exceeds a certain threshold value (Teissié et al., 1993), for a sufficiently long time (Kotnik et al., 2003), the transient and reversible permeabilization of the cells can be obtained without causing tissue lesions. .
- the intensity of the applied electric field depends on the voltage and the distance between the electrodes. It can vary from 20 to 2000 V / cm. Electrical pulses can range from 3 to 8; they generally have a duration of 100 ⁇ s and are delivered at a frequency of 1 to 5000 Hz.
- the electropermeabilization of the cells of a tumor can be obtained, for example, by the exposure of this tumor to 3-8 electrical pulses of 100 microseconds and 1300 V / cm delivered at the repetition rate of 1 Hz per hour. intermediate of two electrodes placed on the skin on either side of the tumor nodule to be treated. Obviously, it is a local treatment, restricted to the volume between the electrodes and subjected to an electric field intensity higher than the threshold value which allows to permeabilize the cells included in this volume: bleomycin, previously administered , will only penetrate the electropermeabilized cells and only the latter will actually be killed.
- the TLR ligands are immunostimulatory oligodeoxynucleotides (ODNs), whether their structure is natural, synthetic or chimeric.
- the TLR ligands are more specifically TLR9 ligands and more particularly immunostimulatory CpG-ODNs.
- said immunostimulatory CpG-ODNs are selected from the group consisting of a stabilized oligodeoxynucleotide which comprises at least one quadrameric unit of formula X 1 -C 2 -X 2 , in which X 1 and X 2 are identical or different and represent T or A.
- said immunostimulatory CpG-ODNs are selected from the group consisting of a stabilized oligodeoxynucleotide which comprises at least one quadrameric unit of formula X 1 -C 2 -X 2 , in which X 1 and X 2 are identical or different and represent T or A.
- CpG-ODN is preferably selected from the group consisting of an oligodeoxynucleotide which comprises at least one quadrameric sequence selected from the group consisting of: TCGA, ACGT, ACGA and TCGT.
- said CpG-ODN is preferably selected from the group consisting of an oligodeoxynucleotide which comprises at least one hexameric sequence selected from the group consisting of: AACGTT, GACGTC, GACGTT, GTCGTT, TTCGAA, TACGTA , ATCGAT, TTCGTT and ATCGTT.
- said CpG-ODN is preferably selected from the group consisting of an oligonucleotide which comprises at least the following octameric sequence: AACGTT-X 3 X 4, wherein X 3 X 4 is AT, AA, CT or TT and preferably the octameric sequence AACGTTAT.
- said CpG-ODN is CpG-ODN of sequence SEQ ID NO: 1.
- the immunostimulatory active ingredient is a CpG-ODN selected from the group consisting of by a stabilized oligonucleotide which comprises at least one octameric unit of the type: 5'-purine-purine-CG-pyrimidine-pyrimidine-XiX 2 -3 ', in which the XiX 2 pair is AT, AA, CT or TT.
- the said CpG-ODN selected from the group consisting of by a stabilized oligonucleotide which comprises at least one octameric unit of the type: 5'-purine-purine-CG-pyrimidine-pyrimidine-XiX 2 -3 ', in which the XiX 2 pair is AT, AA, CT or TT.
- ODN is preferably selected from the group consisting of an oligonucleotide which comprises at least one octameric sequence selected from the group consisting of: GACGTT-X 1 X 2 , AGCGTT-X, X 2 , GGCGTT-XiX 2 , AACGTC-X 1 X 2 , GACGTC-X 1 X 2 , AGCGTC-X 1 X 2 and GGCGTC-XiX 2 , wherein X 1 -X 2 is AT, AA, CT or TT.
- said CpG-ODN is chosen from the group consisting of the sequences SEQ ID NO: 2 to SEQ ID NO: 41.
- the immunostimulatory oligonucleotides can be used in the form of single-strand or double-strand, can include several immunostimulatory sequences adjacent or not. They may also include other biologically active sequences, such as antisense sequences or aptamers.
- the stabilized oligonucleotides can be coupled by covalent, ionic or weak bonds to one or more other molecules that can increase their tumor affinity, modify their biological activity or increase their immunostimulatory activity.
- the anti-cancer active principle is a substance usually used in chemotherapy; Cancer chemotherapy is based on the use of cytotoxic substances belonging to two categories of substances: antimetabolites which interferes in particular with the synthesis of nucleic acids (fluorouracil, methotrexate, doxorubicin), proteins (topoisomerase inhibitors) or other essential metabolic processes such as mitosis (vincristine) and genotoxic substances that modify the structure of DNA as scribing agents (bleomycin) or intercalating agents, in particular alkylating agents (cyclophosphamide, lomustine, temozolomide, platinum derivatives (cisplatin or cis-diaminedichloroplatinum, cDDP or DDP), nitrosourea derivatives (fotemustine or [[(2-chloroethyl) 3-nitro-3-uretido] -1-ethyl-diethyl phosphonate (RS).
- the anti-cancer active ingredient is selected from the group consisting of cytotoxic substances (antimetabolites and genotoxic substances).
- the anti-cancer active principle is preferably a genotoxic substance and even more preferably bleomycin.
- the cells of the tumor are electropermeabilized by exposing said tumor cells to electrical pulses of sufficient strength or intensity and duration to allow the electroporation of said cancer cells; they are preferably electropermeabilized subsequently to the administration of said products; said cells can also be electropermeabilized prior to the administration of said products.
- the intensity of the applied electric field varies between 20 and 2000 V / cm. According to an advantageous arrangement of this embodiment, the intensity of the applied electric field preferably varies between 500 and 1500 V / cm and preferably between 800 and 1300 V / cm. According to yet another advantageous embodiment of said products, the frequency of the pulses varies from 0.01 to 10,000 Hz.
- the frequency of the pulses preferably varies from 1 to 5,000 Hz.
- the duration of the pulses varies from 10 ⁇ s to 10 s.
- the duration of the pulses preferably varies from 50 ⁇ s to 500 ms, and preferably from 100 ⁇ s to 1 ms.
- the anti-cancer active principle is administered intratumorally, locally or systemically.
- the immunostimulatory active ingredient is administered intratumorally, locally or systemically.
- said products are administered in one or more times or in continuous release, in particular by means of osmotic micropumps, or associated with any physical or chemical means, in particular with encapsulating agents such as colloidal dispersion systems and polymers.
- said products are furthermore associated with another treatment, such as radiotherapy, another cytotoxic substance, a cytolytic substance, an antiangiogenic substance, a differentiating substance, an immunostimulatory substance other than an ODN or products derived from cell therapy, such as dendritic cells.
- the products according to the invention can be used in the treatment of cancers, whatever their nature and degree of anaplasia, and they make it possible to obtain, surprisingly, a systematic curative effect, particularly on metastases
- CpG-ODN CpG-ODN
- ECT ECT
- OJ OJ
- SEQ ID NO: 1 administered intratumorally (J1, 8, 15, 22) on two opposing LPB tumors (Mean ⁇ EC).
- FIG. 2 is a detailed mouse-by-mouse representation of the effect of electrochemotherapy (OJ) and CpG-ODN (SEQ ID NO: 1) treatment (J1,
- FIG. 3 illustrates the effect of the ECT + CpG-ODN combination (SEQ ID NO: 1) in the B16OVA tumor model (7 mice per group).
- FIG. 4 illustrates the effect of electroporation of a CpG-ODN
- FIG. 5 is a mouse representation of the effect of electroporation of a CpG-ODN (SEQ ID NO: 1) at J1, 8, 15, 22 intratumorally on two opposing LPB tumors.
- A evolution of the left tumor (treated).
- B evolution of the right tumor (untreated).
- S mouse
- FIG. 6 represents the monitoring of the TCD8 response in the homolateral inguinal ganglion of immunized, treated and untreated mice.
- A visualization of lymphocytes.
- B isolation of TCD8.
- C isolation of specific TCDS from SIINFEKL. It should be understood, however, that these examples are given solely by way of illustration of the subject of the invention, of which they in no way constitute a limitation.
- EXAMPLE 1 MATERIALS AND METHODS
- mice Female C57BL / 6H- 2b mice of 8-20 weeks were used for the establishment of tumor models. These mice from the January Breeding Center (Le Genest, St IsIe, France) were all raised in the service of the small animal of the Gustave Roussy Institute in accordance with the guide of the Ethical Committee of Animal Experimentation. The mice were all humanly sacrificed by inhalation of CO 2 .
- Tumor cell lines The LPB and B 160VA lines were cultured in vitro at 37 ° C under 5% CO 2 . LPB cells are derived from methylcholanthrene-induced sarcoma in C57BL / 6 mice.
- the stable Bl 6OVA line generously provided by Dr. KL Rock (UMass Medical School, Worcester, MA, USA) is derived from a murine melanoma transfected with the gene encoding ovalbumin chicken protein (OVA).
- mice were anesthetized with 150 ⁇ l of a mixture of xylazine (Bayer Pharma, Puteaux, France) at 12.5 mg / kg and ketamine (Parke Davis, Courbevoie, France) at 125 mg / kg injected intraperitoneally before being treated by electroporation or electrochemotherapy.
- Poligodeoxinucleotide containing multiple unmethylated CpG motifs (5'-TAAACGTTATAACGTTATGACGTCAT-3 ') (SEQ ID NO: 1). Fifty micrograms of CpG oligodeoxinucleotides diluted in 100 .mu.l of 0.9% NaCl were injected intratumorally the day after ECT, once a week for four weeks.
- the cells were harvested to resuspend at a concentration of 2.2 ⁇ 10 7 / ml in MEM-S (MEM without calcium, Gibco).
- Aliquots of 10 6 cells / 45 ⁇ l were mixed with 5 ⁇ l of 0.9% NaCl or 5 ⁇ l of CpG varying from a concentration of 5 to 60 ⁇ M.
- the 50 ⁇ l mixture was then placed between 2 electrodes spaced 2 mm apart and immediately the electric shock was delivered (8 pulses of 100 ⁇ s for an electric field of 1000 V / cm and a frequency of 1 Hz).
- the cells were diluted in complete MEM and cultured in triplicate in petri dishes 6 cm in diameter (500 cells / ml). Cell proliferation was estimated after 5 days of culture. For this, the cells were first fixed with formaldehyde for 20 minutes and then stained with crystal violet for 15 minutes.
- a tumor model was created by injecting 5 ⁇ 10 5 B16OVA cells into 50 ⁇ l of RPMI1640 in the right thigh of the mice. After 14 days, the tumor was approximately 5 mm and was treated with ECT (OJ) followed by CpG immunotherapy at J1. In addition, 3 mice were immunized by peptide injection directly into the plantar pad at Jl: 45 ⁇ g of peptide SIINFEKL (Eurogentec) derived from ovalbumin mixed in 50 ⁇ g of ODN-CpG. Seven days after this treatment, all the mice were sacrificed to remove inguinal ganglia. The ganglia were mechanically crushed in 100 ⁇ m filters and the ganglion cells were harvested in RPMI 1640.
- Part of the cells (1-2.10 6) was labeled with tetrameric H-2 b / SIINFEKL coupled to PE (Beckman Coulter, Fullerton, CA) diluted l / 100th for half an hour at room temperature and tempé ⁇ the dark and then with an anti-CD3-FITC and anti-CD8-APC (BD Pharmingen, San Diego, CA) diluted l / 100th during the same period of incubation.
- the cells were then washed once in IX PBS and fixed in 200 .mu.l of 1% paraformaldehyde before being analyzed with the FACScalibur cytofiuimeter using the CellquestPro software.
- Fig. IB The remote antitumor effect was assessed by measuring contralateral tumors.
- simple treatments did not allow stabilization but were associated with a slowdown in tumor proliferation compared with the control group (Fig IB).
- the fibrosarcoma model was reproduced by also implanting 10 6 160VA B cells on the left and right flanks of the mice and respecting the 3-day interval between the two injections. Tumors were treated as described previously 9 days after cell implantation. Only one experiment currently in progress is described from the day of the beginning of the OJ treatment (Fig. 3). The survival rates at the 18 th day of treatment are 28.6%, 71.4%, 14.3% and 85.7% for the EP + NaCl, EP + CpG, ECT + NaCl and ECT + CpG groups respectively. .
- TLR9 The innate immune system detects unmethylated CpG motifs by TLR9 in mice (26). TLR9 are expressed intracellularly precisely at the level of the endoplasmic reticulum (30). Increasing the intracellular concentration of CpG-ODN increases their stimulatory activity (31). The hypothesis of a better efficiency of CpG-ODN when electroporated in vivo in our double LPB tumor model was tested.
- a tumor model was created by injecting 500,000 Bl 6 OVA cells into the cell. leg of animals. This model made it possible to easily treat animals with ECT at OJ and intratumoral CpG at J1. Five groups of 3 mice were created: a group whose tumor-free mice were immunized with the peptide SIINFEKL mixed in CpG on day 1 immunotherapy, three groups treated with ECT + CpG or ECT + NaCl or CpG alone and one untreated group.
- the animals were sacrificed to collect the ipsilateral and contralateral inguinal ganglion from each mouse.
- the possible presence of specific cytotoxic T lymphocytes in the ipsilateral ganglion was investigated ex vivo by labeling with soluble tetramers recognizing H- 2b / SIINFEKL.
- the contralateral inginal ganglions served us as a negative internal control. Only one experiment of this type has been conducted to date, but another is underway.
- FIG. 6 A flow cytometric analysis representative of all of the groups is shown in Figure 6.
- the viable cell population we selected CD3 / CD8 T cells (G2 window) in which the percentage of lymphocytes recognized by the tetramer was determined. This type of analysis was performed for all the groups of the experiment, however no positive labeling was detected including in the control group immunized by the peptide (Fig. 6C). Interferon ⁇ secretion was not found in the supernatant of cultures stimulated in vitro by the peptide. All these results show that the ECT combination associated with CpGs has both local and remote effects.
- the combination according to the invention which targets the immune response more generally and upstream by involving both innate immunity via stimulation of NK and macrophages and the innate hinge acquired by activating the CD makes it possible to obtain an effective antitumor response.
- the Bl 6 OVA melanoma model made it possible to test the effectiveness of the combination according to the invention on another type of tumor other than fibrosarcoma allowing the analysis of the immune response by the expression of the SIINFEKL peptide by the tumor.
- this tumor line proved to be very aggressive and resulted in deaths rapidly not allowing to evaluate the evolution of the tumors, in the double tumor model, and thus to conclude as to the local and distant effects of the treatment.
- this first experience showing a survival rate higher than other groups to ECT + CpG combination in the 18th day of treatment, encouraged to develop a more appropriate model to analyze local and systemic therapeutic effect.
- TLR9 signed after translocating from the ER to CpG DNA in the lysosome. Nat Immunol 5: 190.
- Electrochemotherapy a new antitumor treatment: first clinical trial - Electrochemotherapy, a novel antitumor treatment: first clinical trial. Proceedings of the Academy of Sciences, ser. III, 313, 613-618 (1991b).
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05783840A EP1765361A2 (fr) | 2004-06-25 | 2005-06-24 | Produits contenant au moins un principe actif anticancereux peu diffusible et un principe actif immunostimulant |
| AU2005266225A AU2005266225A1 (en) | 2004-06-25 | 2005-06-24 | Products containing at least one anticancer active principle with low diffusion and an immunostimulatory active principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04291615 | 2004-06-25 | ||
| EP04291615.5 | 2004-06-25 | ||
| EP04292515A EP1649859A1 (fr) | 2004-10-22 | 2004-10-22 | Produits pharmaceutiques contenant au moins un principe actif anticancereux peu diffusible et un principe actif immunostimulant sous forme d'oligodésoxynucléotide |
| EP04292515.6 | 2004-10-22 |
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| WO2006010838A2 true WO2006010838A2 (fr) | 2006-02-02 |
| WO2006010838A3 WO2006010838A3 (fr) | 2006-06-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7378249B2 (en) | 2004-11-19 | 2008-05-27 | Institut Gustave Roussy | Treatment of cancer using TLR3 agonists |
| US20140120088A1 (en) * | 2011-05-24 | 2014-05-01 | Assistance Publique-Hopitaux De Paris | Agents for the treatment of tumors |
| WO2015170292A1 (fr) * | 2014-05-08 | 2015-11-12 | University College Cork | Méthode de traitement du cancer |
| WO2017214569A1 (fr) * | 2016-06-09 | 2017-12-14 | Regents Of The University Of Minnesota | Cellule nk à édition génomique et ses procédés de fabrication et d'utilisation |
| US11147837B2 (en) | 2015-07-31 | 2021-10-19 | Regents Of The University Of Minnesota | Modified cells and methods of therapy |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2323929C (fr) * | 1998-04-03 | 2004-03-09 | University Of Iowa Research Foundation | Procedes et produits servant a stimuler le systeme immunitaire au moyen d'oligonucleotides et de cytokines immunotherapeutiques |
| FR2790955B1 (fr) * | 1999-03-19 | 2003-01-17 | Assist Publ Hopitaux De Paris | Utilisation d'oligonucleotides stabilises comme principe actif antitumoral |
-
2005
- 2005-06-24 AU AU2005266225A patent/AU2005266225A1/en not_active Abandoned
- 2005-06-24 EP EP05783840A patent/EP1765361A2/fr not_active Withdrawn
- 2005-06-24 WO PCT/FR2005/001612 patent/WO2006010838A2/fr not_active Ceased
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7378249B2 (en) | 2004-11-19 | 2008-05-27 | Institut Gustave Roussy | Treatment of cancer using TLR3 agonists |
| US8409813B2 (en) | 2004-11-19 | 2013-04-02 | Institut Gustave Roussy | Treatment of cancer using TLR3 agonists |
| US20140120088A1 (en) * | 2011-05-24 | 2014-05-01 | Assistance Publique-Hopitaux De Paris | Agents for the treatment of tumors |
| US10953093B2 (en) | 2014-05-08 | 2021-03-23 | University College Cork | Method for treating cancer |
| US10143750B2 (en) | 2014-05-08 | 2018-12-04 | University College Cork | Method for treating cancer |
| WO2015170292A1 (fr) * | 2014-05-08 | 2015-11-12 | University College Cork | Méthode de traitement du cancer |
| US11147837B2 (en) | 2015-07-31 | 2021-10-19 | Regents Of The University Of Minnesota | Modified cells and methods of therapy |
| US11266692B2 (en) | 2015-07-31 | 2022-03-08 | Regents Of The University Of Minnesota | Intracellular genomic transplant and methods of therapy |
| US11583556B2 (en) | 2015-07-31 | 2023-02-21 | Regents Of The University Of Minnesota | Modified cells and methods of therapy |
| US11642375B2 (en) | 2015-07-31 | 2023-05-09 | Intima Bioscience, Inc. | Intracellular genomic transplant and methods of therapy |
| US11642374B2 (en) | 2015-07-31 | 2023-05-09 | Intima Bioscience, Inc. | Intracellular genomic transplant and methods of therapy |
| US11925664B2 (en) | 2015-07-31 | 2024-03-12 | Intima Bioscience, Inc. | Intracellular genomic transplant and methods of therapy |
| WO2017214569A1 (fr) * | 2016-06-09 | 2017-12-14 | Regents Of The University Of Minnesota | Cellule nk à édition génomique et ses procédés de fabrication et d'utilisation |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1765361A2 (fr) | 2007-03-28 |
| AU2005266225A1 (en) | 2006-02-02 |
| WO2006010838A3 (fr) | 2006-06-15 |
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