WO2011128561A1 - Protéine de fusion robo1-fc et son utilisation dans le traitement des tumeurs - Google Patents
Protéine de fusion robo1-fc et son utilisation dans le traitement des tumeurs Download PDFInfo
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- C12N15/09—Recombinant DNA-technology
Definitions
- the present invention relates to a recombinant Robo1-Fc protein and its use for treating diseases in which a Slit protein is overexpressed, including cancer. It also relates to a composition comprising such a recombinant protein. Another aspect of the invention is the use of a Robo1-Fc molecule as a diagnostic tool for detecting overexpression of a Slit family molecule in a patient.
- Robol protein has two isoforms a and b.
- the extracellular domain of the Robol isoform b protein (NP_598334) comprises 5 immunoglobulin domains: Ig1, Ig2, Ig3, Ig4 and Ig5.
- Robo protein interacts with Slit ligands at the I g 1 and Ig 2 domains.
- Liu et al. 2004, Mol Cell Neurosci, 26: 232-240
- the inventors have developed a strategy of soluble chimeric Robol receptors capable of binding Slit ligands and consequently of inhibiting intracellular signaling of the Robo / Slit pathway.
- the Robol-Fc molecules according to the invention have an anti-angiogenic effect by preventing the formation of mature vessels and not by inhibiting the proliferation of endothelial cells.
- the subject of the present invention is a recombinant Robo-Fc protein comprising the extracellular domain of the Robol isoform b protein or a part of this domain, a junction region (linker) and an Fc domain of an immunoglobulin.
- the extracellular domain of the Robol isoform b protein consists of the Ig1 and Ig2 domains. These domains correspond to the peptide of SEQ ID NO.2 encoded by the nucleotide sequence SEQ ID NO.1, or a sequence exhibiting at least 80%, 85%, 90%, 95% or 99% identity with the SEQ ID sequences. NO.2.
- the fusion protein also comprises a junction region, also called a "linker".
- the linker makes it possible to bring stability to the recombinant protein, in particular by limiting the cleavage in vivo.
- Linkers that can be used in a Robol-Fc molecule are, for example, GluArgProSerPheVal and GlyGlyGlyGlySer. The skilled person has sufficient knowledge to choose a linker suitable for this use.
- the Fc domain of the Robol-Fc recombinant molecules according to the invention corresponds to a crystallizable fragment of an immunoglobulin.
- This Fc fragment can come from different immunoglobulins IgG1, IgG2, IgG3 or IgG4. It is responsible for the effector function of the immune response (WO2008 / 065543).
- the Fc domain is derived from an IgG4 immunoglobulin.
- at least one mutation or point deletion has been introduced into the Fc domain of NgG4 so as to increase the stability of the molecule, in particular by stabilizing the hinge region constituted by the 2 Fc domains (Angla et al., 1993, Mol.Immunol., 30: 105-108), to reduce or eliminate the residual activity of IgG4-Fc, in particular the effector activity (WO 97/09351) and to increase homogeneity during production of the recombinant protein.
- at least two mutations, preferably three point mutations have been introduced in the Fc domain of NgG4.
- the preferred mutations are as follows:
- Robo1-Fc molecules according to the invention comprising the domains I g 1 and Ig 2 of Robol isoform b, a linker and a lgG4 domain mutated as described above are Robol -Fc L1, Robol-Fc L2 and Robol-Fc L3.
- Robol -Fc L1 corresponds to the protein of sequence SEQ ID NO.4, encoded by the nucleotide sequence SEQ ID NO.3.
- Robol -Fc L2 corresponds to the protein of sequence SEQ ID NO.6, encoded by the nucleotide sequence SEQ ID NO.5.
- Robol -Fc L1 and Robol -Fc L2 differ by the nature of the linker.
- Robol-Fc L3 corresponds to the protein of sequence SEQ ID NO.24, encoded by the nucleotide sequence SEQ ID NO.23.
- one or more point mutations or deletions have been introduced in order to increase homogeneity during production.
- an amino acid preferably two amino acids have been truncated in the N-terminal position.
- Such a Robo-1-Fc molecule according to the invention is the Robo1-Fc L3 molecule, in which the two amino acids (Ser20 and Arg21) have been truncated and in which the amino acid Leu 22 has been fused to the signal peptide of interleukin 2.
- the homogeneity of the Robo1-Fc molecules according to the invention is also increased by deleting the C-terminal lys as previously described.
- the subject of the invention is also proteins whose protein sequence corresponds to the sequences SEQ ID NO.2, SEQ ID NO.4, SEQ ID NO.6 or SEQ ID N0.24 or present at least 80%, 85%, 90 %, 95% or 99% identity with the sequences SEQ ID NO.2, SEQ ID NO.4, SEQ ID NO.6 or SEQ ID NO.24.
- These protein variants have the same biological activity as proteins having the sequence SEQ ID NO.2, SEQ ID NO.4, SEQ ID NO.6 or SEQ ID NO.24, in particular their ability to interact with the proteins of the Slit family.
- the Robo1-Fc proteins according to the invention may be produced by transfection of the expression plasmids encoding these proteins in any cell type suitable for the expression of eukaryotic recombinant proteins: HEK293, CHO, etc. and then recovered in the supernatant of culture and purified according to conventional methods.
- a Robo1-Fc protein according to the invention has the capacity to interact with a protein of the Slit family.
- the Robo1-Fc proteins according to the invention specifically recognize the human Slit1, Slit2 and Slit3 proteins and the murine Slit2 protein, in particular by interaction with their D2 domain. Their affinity is similar vis-à-vis the 3 members of the Slit family.
- Another object according to the invention corresponds to the nucleic acid molecules encoding the proteins according to the invention.
- Another object according to the invention is the use of a Robo1-Fc protein according to the invention for treating diseases in which a protein of the Slit family is overexpressed.
- the proteins of the Slit family that can be targeted by the Robo1-Fc according to the invention are Slit-1, Slit-2 or Slit-3.
- Robol-Fc proteins are capable of simultaneously inhibiting the signaling pathways mediated by Slit1, Slit2 and Slit3, which makes it possible to widen the therapeutic spectrum in comparison with the antibodies. which are specific only to one of these ways.
- a Robol-Fc protein is used to treat diseases in which a protein of the Slit family is overexpressed by inhibiting angiogenesis without inhibiting endothelial cell proliferation.
- This antiangiogenic activity related to a lack of maturation of the vessels is called "non-productive angiogenesis”.
- Robol-Fc molecules according to the invention are capable of inhibiting the formation of tubules, without inhibiting the proliferation of endothelial cells. They make it possible to very significantly reduce the tumor volume in a mouse model of lung cancer.
- the Robol-Fc proteins that can be used to treat diseases in which a Slit protein is overexpressed are Robol-Fc L1, Robol-Fc L2 and Robol-Fc L3, as well as the molecules derived therefrom. include mutations or point deletions aimed at increasing the homogeneity during production without significantly altering the biological properties of these molecules.
- the diseases that can be treated by a Robo1-Fc protein according to the invention are all diseases in which inhibition of the Slit pathway can have a therapeutic effect, in particular diseases in which a protein of the family Slit is overexpressed, especially those in which Slit2 is overexpressed.
- the Robo1-Fc molecules according to the invention specifically bind the Slit-2 molecule, it is interesting to note that they are capable of simultaneously inhibiting the two pathways in which Slit-2 is involved, namely the Robo1 / Slit pathways. -2 and Robo4 / Slit-2.
- the Robo1-Fc proteins according to the invention can therefore be used to treat cancer, especially pancreatic cancer, colon cancer, colorectal cancer with or without lymphatic metastasis, breast cancer, lung cancer and metastases.
- Robo-Fc proteins are used to treat lung cancer and lung metastases.
- the Robo1-Fc molecules according to the invention can also be used as an anti-cancer drug as an alternative to or in addition to current therapeutics.
- these molecules can be administered in combination (simultaneous or not) with anti-cancer compounds.
- Another subject of the invention relates to a composition
- a composition comprising a Robo1-Fc protein as defined above and one or more pharmaceutically acceptable excipients.
- the Robo1-Fc proteins according to the invention can be formulated in pharmaceutical compositions for topical, oral, parenteral, intranasal, intravenous, intramuscular, subcutaneous administration, intraocular, etc.
- the pharmaceutical compositions contain pharmaceutically acceptable vehicles for an injectable formulation. It may be in particular salt solutions (monosodium phosphate, disodium, sodium chloride, potassium, calcium or magnesium, etc., or mixtures of such salts), sterile, isotonic, or dry compositions, in particular freeze-dried, which by the addition of sterilized water or physiological saline as appropriate, allow the constitution of injectable solutions.
- Another aspect of the invention is the use of a Robo1-Fc molecule as a diagnostic tool for detecting overexpression of a Slit family molecule in a patient. Indeed, it has been shown that the Slit pathway is involved in many cancers. The provision of a test to evaluate a deregulation of the Slit signaling pathway is very useful in order to select patients likely to respond to a treatment based on the administration of a Robo1-Fc molecule.
- This diagnostic tool may be in the form of a ready-to-use kit, comprising a Robo1-Fc molecule in a form adapted to its contact with a biological sample of a patient (blood, urine, tumor biopsy) susceptible to overexpress a Slit molecule.
- the Robo-Fc molecule may be labeled beforehand or not, and the Robo-Fc and Slit combination is detected so as to evaluate an increase in the expression of a Slit protein in the biological sample in comparison with a control sample.
- This kit may for example be in the form of an ELISA kit.
- FIG. 1 Robo1 -Fc L1, Robo1-Fc L2 and Robo1-Fc L3 protein expression plasmids.
- Figure 2 Evaluation of the interaction of the Robo1-Fc fusion protein variants with the Slit2 protein by ELISA.
- Figure 3 Robo1-Fc affinity for HEK293 cells not expressing Slit-2 measured by FACS.
- Figure 4 Robo1-Fc affinity for HEK293 cells expressing Slit2 measured by FACS.
- Figure 5 Pharmacokinetic profile of Robo1-Fc proteins after iv injection in mice.
- FIG. 6 Effect of the Robo1-Fc L1 molecule in a co-culture assay with endothelial cells and mesenchymal cells
- A Description of the protocol for the preparation of an aortic ring and measurement of the tubules.
- Example 1 Preparation of Robo1-Fc Proteins a. Constructs allowing the expression of Robol - Fc recombinant proteins used as biotherapeutic agents.
- the recombinant Robo1-Fc proteins consist of a fusion between the first 2 immunoglobulin domains (Ig1-lg2) of the human Robol protein isoform b (NP_598334) and the Fc domain of human immunoglobulin G4 (hlgG4-Fc, SwissProt IGHG4_HUMAN ).
- a cDNA fragment (SEQ ID NO.1) corresponding to the immunoglobulin (Ig) Ig1 and Ig2 domains of this protein (SEQ ID NO.2) followed by a GluArgProSerPheVal linker was amplified by PCR from the human fetal heart cDNA library (Ref.HL5042T Clontech). This amplified fragment was then cloned into the eukaryotic expression vector pXL4904 (described in FIG. 1) so that the two Robol Ig domains are expressed in fusion with the human C-terminal FG domain of NgG4.
- the same cDNA corresponding to the Ig1-Ig2 domains but without the mentioned linker was cloned into the eukaryotic expression vector pXL4909 (described in Figure 1) which allows the expression of these Ig domains. in fusion with the same NgG4 Fc domain containing the 3 point mutations described in the Robo1-Fc L1 construct, but this time introducing a GlyGlyGlyGlySer linker upstream of the Fc domain.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID No. 5.
- the recombinant protein obtained is named Robol-Fc L2 and corresponds to the protein sequence SEQ ID No. 6.
- the cDNA cloned previously in the plasmid pXL4904 was modified by PCR to introduce the point mutations allowing the substitutions of the leucine position 38 in glutamine and the phenylalanine in position 89 in tyrosine.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID No. 7.
- the recombinant protein obtained is named Robo1-Fc Slit-2 minus and corresponds to the protein sequence SEQ ID NO.8.
- the cDNA cloned into the plasmid pXL4904 was modified by PCR to introduce point mutations allowing substitutions of arginine position 97 to alanine and lysine position 98 to alanine.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID NO.9.
- the recombinant protein obtained is named Robo1-Fc Heparin-minus and corresponds to the protein sequence SEQ ID NO. 10. vs. Production of different Robo1-Fc proteins
- the two Robo1-Fc L1 and Robo1-Fc L2 proteins were produced by transient transfection in the HEK293 line (FreeStyle 293-F cells ref 51 -0029 Invitrogen according to the supplier's recommendations) using the plasmids pXL4904 and pXL4909 respectively, and accessory plasmids pXL4544 and pXL4551 allowing the expression of two N-glycans glycosylation enzymes, ie o-2,3-sialyltransferase and ⁇ -1,4-galactosyltransferase as described in the application WO2008 / 065543. These proteins were also produced by transfection into the CHO line (CHO-S cells, ref. 1619-012 Invitrogen according to the supplier's recommendations) using plasmids pXL4904 and pXL4909 respectively.
- the Robo1-Fc L1 and Robo1-Fc L2 proteins expressed in the culture supernatant of HEK293 cells were purified by affinity column chromatography protein A (MabSelect Ref 17-5199-02 Amersham Biosciences) and elution in 20 mM buffer NaCl / 100 mM acetic acid then formulated in PBS buffer (ref.11490-094, Invitrogen).
- the cDNA coding for the human Slit2 protein corresponds to the reference protein NP_004778. Fragments of this cDNA were amplified by PCR from the human brain cDNA library (Ref 639300, Clontech).
- the cDNA corresponding to the D2 domain was cloned into the eukaryotic expression vector pXL491 1 in order to express this domain containing a Histag in C-terminal position.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID NO.1 1.
- the recombinant protein obtained is named Slit-2-D2 and corresponds to the protein sequence SEQ ID NO.12.
- the cDNA corresponding to the D1-D2 domains was cloned into the eukaryotic expression vector pXL4912 in order to express these two domains containing a Histag in the C-terminal position.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID NO.13.
- the recombinant protein obtained is named Slit-2-D1 D2 and corresponds to the protein sequence SEQ ID NO.14.
- the cDNA corresponding to the extracellular portion (Nt) of the Slit2 protein was cloned into the eukaryotic expression vector pXL5033 in order to express this protein with a C-terminal Histag.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID NO.15.
- the recombinant protein obtained is named Slit-2-N and corresponds to the protein sequence SEQ ID NO.16.
- the protein carries the Thr31 1 Ser, Lys313Arg, Ne329Leu, Ne41 1Val and Pro418Ala mutations allowing it to be identical to the D2 domain of the murine Slit2 protein.
- This plasmid makes it possible to express the D2 domain of the murine Slit2 protein with a Histag in C-terminal position.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID No. 17.
- the recombinant protein obtained is named mSlit-2-D2 and corresponds to the protein sequence SEQ ID NO.18.
- the cDNA coding for the human Slit1 protein corresponds to the reference protein described NP_003052.
- a fragment of this cDNA was amplified by PCR from the human brain cDNA library (Ref 639300, Clontech).
- the cDNA corresponding to the D2 domain was cloned into the eukaryotic expression vector pXL5020 in order to express this domain containing a Histag in the C-terminal position.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID NO.19.
- the recombinant protein obtained is named Slit-1 -D2 and corresponds to the protein sequence SEQ ID NO.20.
- the cDNA coding for the human Slit3 protein corresponds to the reference protein described NP_003053.
- a fragment of this cDNA was amplified by PCR from the human brain cDNA library (Ref 639300, Clontech).
- the cDNA corresponding to the D2 domain was cloned into the eukaryotic expression vector pXL5021 in order to express this domain containing a Histag in the C-terminal position.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID NO.21.
- the recombinant protein obtained is named Slit-3-D2 and corresponds to the protein sequence SEQ ID No. 22.
- Slit-2-D2 Slit-2-D1 D2 and Slit-2-N were produced by transient transfection in the line HEK293 (FreeStyle 293-F cells according to the recommendations of the supplier Invitrogen) using the plasmid pXL491 1 (respectively pXL4912 or pXL5033).
- the Slit-2-D2 and Slit-2-D1 D2 proteins expressed in the culture supernatant of the HEK293 cells were purified by Sepharose Ni-chelating column chromatography (Ref 17-0409-03, Amersham Biosciences) and elution in imidazole buffer and then formulated in PBS buffer (ref.11490-094, Invitrogen) adjusted to 1 M NaCl. Mass spectrometry (LC / MS) analysis demonstrated the identity of these proteins.
- Example 3 Study of the affinity of recombinant Robo1-Fc proteins for Slit proteins and for heparin using three methods: ELISA, SPR and FACS a. Affinity of Robo1-Fc proteins for heparin
- Table 2 shows the 448 mM NaCl concentration required to elute the Robo1-Fc L1 protein as described in the literature (Fukuhara, N. et al., 2008 J. Biol Chem 283 p16226-16234).
- Table 2 Robo1-Fc affinity to heparin
- the human protein Slit2-D2 was fixed on lmmulon-4 enzyme-linked plates (VWR Scientific Inc. Swedesboro, NJ). A concentration range (from 20 ⁇ g ml to 0.02 ⁇ g ml) of the Robo1-Fc L1 and Robo1-Fc L2 variants was added and then detected using peroxidase-conjugated goat anti-human IgG antibody (Sigma, ref. A0170-1: 50000 dilution). Revelation was performed with the TMB-H 2 0 2 substrate (Interchim ref # UP664780) and measurements with the 450 nm plate reader. The results obtained are reported in FIG. 2.
- This example describes the interaction of the Robo1-Fc L1 fusion protein with the Slit-1 -D2, Slit-2-D2 and Slit-3-D2 variants by ELISA assay.
- the D2 domain of human Slit variants were fixed on lmmulon-4 enzyme-linked plates (VWR Scientific Inc. Swedesboro, NJ).
- a concentration range (from 1 ⁇ g mL to 0.001 g / mL) of the Robo1-Fc L1 fusion protein was added and then detected using peroxidase-conjugated goat anti-human IgG antibody (Sigma, ref A0170). -dilution at 1: 50000).
- the Robo1-Fc Slit-2-less protein has no affinity to heparin and is therefore a negative heparin mutant. d. Evaluation of the interaction of the Robo1-Fc protein with murine Slit-2 protein
- This example describes the interaction of the Robo1-Fc L1 fusion protein with the murine mSlit-2-D2 protein by ELISA assay.
- the murine mSlit-2-D2 protein was fixed on a lmmulon-4 enzyme-linked box (VWR Scientific Inc. Swedesboro, NJ).
- a concentration range (from 2 ⁇ g mL to 0.002 ⁇ g mL) of the Robo1-Fc L1 fusion protein was added and then detected by the peroxidase-conjugated goat anti-human IgG antibody (Sigma, ref A0170- dilution to 1: 50000).
- Revelation was performed with the TMB-H 2 0 2 substrate (Interchim ref # UP664780) and measurements with the plate reader at 450 nm. The results obtained are reported in Table 4 below.
- This example describes the determination of the affinity constant of the Robo1-Fc L1 fusion protein with human Slit-2 protein (in this Slit-2-D2 experiment) by SPR (Surface Plasmon Resonance, BIAcore 2000).
- SPR Surface Plasmon Resonance, BIAcore 2000.
- the interaction between the Robo1-Fc protein and the human Slit2 protein was analyzed after attaching the Robo1-Fc fusion protein to a CM5 chip.
- the kinetic measurements are carried out according to the protocol of Canziani et al., 2004.
- Table 5 Robo-Fc Ll affinity constant with human Slit2-D2 by SPR (steady-state analysis)
- This example describes the affinity of the Robo1-Fc protein on mammalian cells HEK293 expressing Slit2.
- the cells were plated into a 96-well plate 48 hours post-transfection, and the Robo1-Fc protein was added in a range of 0.01 to 3 mg / L for 30 minutes at 4 ° C.
- the Robo1-Fc protein is either the Robo-Fc L1 bio-therapeutic agent, or the Robo1-Fc Slit-2-less mutant, or the Robo1-Fc Heparin-less mutant.
- the cells were washed and the Alexa 488-labeled human anti-Fc antibody (ref: A-1 1013, Invitrogen) was incubated for 30 min at 4 ° C. Then the labeled HEK293 cells are quantified by FACS (Geomean).
- Figure 3 depicts binding of HEK293 cells to Robo1-Fc protein via fluorescence measured in FACS in the absence of Slit-2 expression.
- the Robo1-Fc protein and the Robo1-Fc Slit-2-minus mutant bind to the HEK293 cells while the Robo1-Fc Heparin-min mutant does not bind.
- Robo1-Fc therefore binds in part to HEK293 cells via heparin binding at low concentrations of Robo1-Fc of 0.3 to 0.03 mg / L.
- Figure 4 depicts binding of HEK293 cells to Robo1-Fc protein via fluorescence measured in FACS when Slit-2-N is expressed by transient transfection. Only the Robo1-Fc protein binds to HEK293 cells expressing Slit-2N. The Robo1-Fc Slit-2-minus and Robo1-Fc Heparin-min mutants do not bind (or almost no) in the range of Robo1-Fc 3.0 to 0, 3 mg / L compared to the Robo1-Fc L1 biotherapeutic protein.
- Table 7 describes the FACS measured affinity constants of the Robo1-Fc protein when the Slit-2-N, Slit-2-D1 D2 or Slit-2-D2 proteins are expressed in the HEK293 line.
- the Robo1-Fc Slit-2-minus mutant was found to be Slit-2 negative and the Robo1-Fc Heparin-min mutant has a lower affinity for Slit2 than the bio-therapeutic protein.
- Robo1-Fc binds to Slit-2-N and Slit-2-D1 D2 expressed by HEK293 cells with comparable affinities that are better than that with Slit-2-D2.
- This example describes the pharmacokinetic profile and plasma concentration of the Robo1-Fc protein injected once in intravenous (iv) mice.
- the mice were anesthetized, blood was collected and collected in a tube containing 10 ⁇ l of citrate (CPD-A, C). -4431 Sigma) and 2 ⁇ of protease inhibitors (Complete Protease Inhibitor Mix, Roche Molecular Biochemical).
- the tubes were centrifuged and the plasma samples were collected and frozen at -20 ° C.
- the Slit2 protein (Slit-2-D2) was coated in the wells of the 96-well dishes, the plasma samples diluted to 1/5000 and 1/20000 were contacted for one hour at 37 ° C.
- the anti-human Fc antibodies conjugated to peroxidase (ref. 31413, Pierce) was then incubated and revealed with TMB-H 2 0 2 (ref UP664780, Interchim) and the absorbance was read at 450 nm.
- a standard range was made with each purified Robo1-Fc protein.
- the plasma concentrations of the Robo1-Fc L1 and Robo1-Fc L2 proteins are shown in FIG. 5.
- the pharmacokinetic parameters are described in the following table 8 and show that the protein is stable after injection in the mouse.
- Table 8 Pharmacokinetic Parameters of Robo1-Fc Proteins After IV Injection in Mice
- Example 5 Description of the Robo1-Fc bio-therapeutic protein improved for its homogeneity in the N-terminal position.
- This example describes the expression plasmid, the production and physico-chemical characterization of another Robo1-Fc protein named Robo1-Fc L3 which is different from the Robo1-Fc L1 protein by the absence of the first two residues Ser20 and Arg21.
- the cDNA cloned into the plasmid pXL4904 was modified by PCR to remove the Ser20 and Arg21 codons and fused the next codon (Leu22) to the coding sequence of the peptide signal of nterleukin 2.
- the expression plasmid pXL5004 was then generated. , see Figure 1.
- the cDNA sequence used to express this recombinant protein corresponds to the sequence SEQ ID NO.23.
- the Robo1-Fc L3 protein was produced, purified and characterized as described in Example 1. N-terminal analysis showed that this purified protein was perfectly homogeneous.
- the recombinant protein obtained is named Robo1-Fc L3 and corresponds to the protein sequence SEQ ID NO.24.
- Human Slit-2-D2 protein was fixed on lmmulon-4 enzyme-linked plates (VWR Scientific Inc. Swedesboro, NJ). A concentration range (from 1 ⁇ g mL to 0.001 g / mL) of the Robo1-Fc L3 fusion protein was added and then detected using peroxidase-conjugated goat anti-human IgG antibody (Sigma, ref A0170). -dilution at 1: 50000). Revelation was performed with the TMB-H 2 0 2 substrate (Interchim ref # UP664780) and measurements with the plate reader at 450 nm. The results obtained are reported in Table 9 below.
- the in vitro angiogenesis model corresponds to a rearrangement of human venous endothelial cells on a monolayer of human dermal fibroblasts. Briefly, fibroblasts (Lonza) are seeded in 24-well plates (Becton Dickinson) at 40,000 cells / well in 1 ml of medium. After 3 days of proliferation (J3), human venous endothelial cells (HUVEC-Lonza) are seeded on the 10-fold fibroblast cell monolayer.
- EGM ® medium Endothelial Basal Medium, Lonza
- FCS fetal calf serum - Lonza
- hEGF Human Recombinant Epidermal Growth Factor - Lonza
- the cells are fixed with ethanol and labeled with an antibody specific for anti-CD31 HUVECs, followed by an anti-alkaline phosphaphatase antibody and then revealed with an alkaline-phosphatase substrate (J 1 1).
- Quantitation of the tubules labeled with the anti-CD31 antibody is carried out by means of microscope image acquisitions (objective X4) and the analysis of the length of the pseudo-tubules is carried out with the aid of a computer software. image (BIOCOM-Visiolab 2000 software) ( Figure 6).
- Robo1-Fc L1 500 ⁇ g / ml shows inhibitory activity of the formation of tubules formed by HUVECs.
- the Robo1-Fc L1 molecule was evaluated in a mouse aortic ring model. Briefly, mouse aorta are removed and cleaned and cut into a 1 mm (J0) section. These rings are included in rat collagen in the presence of VEGF at 10 ng / ml, the Robo1-Fc L1 molecule or a negative control Robo1-Fc Slit-2-less at a concentration of 500 ⁇ g / ml. Tubules will form from the ring thus mimicking in vitro the formation of neovessels. After 6 days, a quantification of the marked tubules is carried out thanks to microscope image acquisitions (objective X3) (FIG. 7A) and the analysis of the length of the pseudo-tubules is carried out using software image (BIOCOM- Visiolab 2000 software) ( Figure 7).
- Robo1-Fc L1 (500 ⁇ g / ml) shows a strong Inhibitory activity of formation of tubules formed in comparison with the Robo1-Fc Slit-2-less molecule used as a negative control.
- the Robo1-Fc L1 molecule was evaluated in a model of pulmonary cancer tumor in C57 / BI6 mice. at. Murine model of lung tumor
- mice Female C57 / BI6 mice aged 8 weeks were anesthetized. The area at the left shoulder blade of the mouse has been shaved and disinfected. A 1 cm incision was made above the scapula.
- the cells to be injected come from a Lewis lung carcinoma (ATCC, CRL-1642) tumor line.
- the cells were mixed with Matrigel® in a ratio of 1 vol Matrigel to 4 vol of cells.
- the cell concentration was 62500 cells / ml.
- Cells were injected into the lung at a rate of 20 ⁇ per mouse and then the wound was sutured.
- mice were euthanized.
- the rib cage was opened, the left lung and the mediastinal chain were removed.
- the tumor on the left lung was measured using an electronic caliper to determine the tumor volume according to the formula: I2XLX0.52.
- the mediastinal chain is weighed. The results are expressed as mean value ⁇ standard deviation at the mean. Statistical analysis was done by a Student parametric test. b.
- mice carrying a pulmonary tumor with the recombinant protein Robo1-Fc The treatment using the Robo1-Fc protein was carried out as follows: A preparation containing the Robo1-Fc protein was injected at the dose of 25 mg / kg / day intraperitoneally at D10, D14, D17, and J21 post injection of tumor cells. The control group was injected with PBS buffer (10 ml / kg). vs. Results
- the average tumor volume obtained in the group treated with the Robo1-Fc recombinanate protein was 21.45 ⁇ 2.16 mm3; the mean tumor volume obtained in the control group was 39.93 ⁇ 8.41 mm3.
- the reduction in tumor volume in the animals treated with the Robo1-Fc protein is 46%. This difference is statistically significant (p ⁇ 0.05).
- the average weight of the mediastinal chain (metastatic lymph nodes) obtained in the group treated with the Robo1-Fc protein is 12.50 ⁇ 1 .26 mg.
- the average weight of the mediastinal chain obtained in the control group is 30.67 ⁇ 7.69 mg.
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Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EA201291044A EA201291044A1 (ru) | 2010-04-14 | 2011-04-08 | Слитый белок robo1-fc и его применение в лечении опухолей |
| KR1020127026724A KR20130059329A (ko) | 2010-04-14 | 2011-04-08 | Robo1―fc 융합 단백질 및 종양 치료를 위한 그의 용도 |
| BR112012026020A BR112012026020A2 (pt) | 2010-04-14 | 2011-04-08 | proteína de fusão robo1-fc e uso da mesma para tratar tumores |
| US13/641,012 US9493529B2 (en) | 2010-04-14 | 2011-04-08 | Robo1-Fc fusion protein and use thereof for treating tumours |
| MA35354A MA34221B1 (fr) | 2010-04-14 | 2011-04-08 | Protéine de fusion robo1-fc et son utilisation dans le traitement des tumeurs |
| MX2012011822A MX338981B (es) | 2010-04-14 | 2011-04-08 | Proteina de fusion robo1-fc y sus uso en el tratamiento de tumores. |
| CN2011800238283A CN102884076A (zh) | 2010-04-14 | 2011-04-08 | Robo 1-Fc融合蛋白及其用于治疗肿瘤的用途 |
| PH1/2012/502044A PH12012502044A1 (en) | 2010-04-14 | 2011-04-08 | Robo1-fc fusion protein and use thereof for treating tumours |
| CA2796303A CA2796303A1 (fr) | 2010-04-14 | 2011-04-08 | Proteine de fusion robo1-fc et son utilisation dans le traitement des tumeurs |
| SG2012075107A SG184529A1 (en) | 2010-04-14 | 2011-04-08 | Robo1-fc fusion protein and use thereof for treating tumours |
| AU2011239839A AU2011239839B2 (en) | 2010-04-14 | 2011-04-08 | Robo1-Fc fusion protein and use thereof for treating tumours |
| EP11719346A EP2558489A1 (fr) | 2010-04-14 | 2011-04-08 | Protéine de fusion robo1-fc et son utilisation dans le traitement des tumeurs |
| JP2013504311A JP5858442B2 (ja) | 2010-04-14 | 2011-04-08 | Robo1−Fc融合タンパク質および腫瘍を治療するためのこの使用 |
| TNP2012000473A TN2012000473A1 (fr) | 2010-04-14 | 2012-09-28 | Proteine de fusion robo1-fc et son utilisation dans le traitement des tumeurs |
| IL222382A IL222382A (en) | 2010-04-14 | 2012-10-11 | United protein fc – 1robo and its use in the treatment of tumors |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1052829 | 2010-04-14 | ||
| FR1052829A FR2958936A1 (fr) | 2010-04-14 | 2010-04-14 | Proteine de fusion robo1-fc et son utilisation dans le traitement des tumeurs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011128561A1 true WO2011128561A1 (fr) | 2011-10-20 |
Family
ID=42830780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2011/050811 Ceased WO2011128561A1 (fr) | 2010-04-14 | 2011-04-08 | Protéine de fusion robo1-fc et son utilisation dans le traitement des tumeurs |
Country Status (27)
| Country | Link |
|---|---|
| US (1) | US9493529B2 (fr) |
| EP (1) | EP2558489A1 (fr) |
| JP (1) | JP5858442B2 (fr) |
| KR (1) | KR20130059329A (fr) |
| CN (1) | CN102884076A (fr) |
| AR (1) | AR080891A1 (fr) |
| AU (1) | AU2011239839B2 (fr) |
| BR (1) | BR112012026020A2 (fr) |
| CA (1) | CA2796303A1 (fr) |
| CL (1) | CL2012002879A1 (fr) |
| CR (1) | CR20120508A (fr) |
| DO (1) | DOP2012000265A (fr) |
| EA (1) | EA201291044A1 (fr) |
| EC (1) | ECSP12012230A (fr) |
| FR (1) | FR2958936A1 (fr) |
| GT (1) | GT201200275A (fr) |
| IL (1) | IL222382A (fr) |
| MA (1) | MA34221B1 (fr) |
| MX (1) | MX338981B (fr) |
| NI (1) | NI201200155A (fr) |
| PE (1) | PE20130199A1 (fr) |
| PH (1) | PH12012502044A1 (fr) |
| SG (1) | SG184529A1 (fr) |
| TN (1) | TN2012000473A1 (fr) |
| TW (1) | TW201142024A (fr) |
| UY (1) | UY33334A (fr) |
| WO (1) | WO2011128561A1 (fr) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130273049A1 (en) * | 2010-12-23 | 2013-10-17 | Sanofi | Robo1-fc fusion protein for use in the treatment of hepatocarcinoma |
| US9572879B2 (en) | 2012-01-05 | 2017-02-21 | Boston Medical Center Corporation | ROBO2 inhibitory compositions comprising SLIT2-binding extracellular domain of ROBO2 |
| US10906955B2 (en) | 2017-06-02 | 2021-02-02 | Pfizer Inc. | Recombinant ROBO2 proteins, compositions, methods and uses thereof |
| US11406682B2 (en) | 2017-08-24 | 2022-08-09 | Bar-Ilan University | Roundabout (Robo) receptor inhibitors and uses thereof |
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| JP3079571B2 (ja) | 1993-04-05 | 2000-08-21 | ダイキン工業株式会社 | ポリテトラフルオロエチレン繊維,それを含む綿状物およびその製造方法 |
| US11566082B2 (en) | 2014-11-17 | 2023-01-31 | Cytiva Bioprocess R&D Ab | Mutated immunoglobulin-binding polypeptides |
| CN107298715B (zh) * | 2016-04-15 | 2021-05-04 | 阿思科力(苏州)生物科技有限公司 | Slit2D2-嵌合抗原受体及其应用 |
| US11708390B2 (en) | 2016-05-11 | 2023-07-25 | Cytiva Bioprocess R&D Ab | Method of storing a separation matrix |
| JP7031934B2 (ja) | 2016-05-11 | 2022-03-08 | サイティバ・バイオプロセス・アールアンドディ・アクチボラグ | 分離マトリックス |
| US10703774B2 (en) | 2016-09-30 | 2020-07-07 | Ge Healthcare Bioprocess R&D Ab | Separation method |
| EP3455243B1 (fr) | 2016-05-11 | 2021-03-24 | Cytiva BioProcess R&D AB | Matrice de séparation |
| US10730908B2 (en) | 2016-05-11 | 2020-08-04 | Ge Healthcare Bioprocess R&D Ab | Separation method |
| ES2909833T3 (es) | 2016-05-11 | 2022-05-10 | Cytiva Bioprocess R & D Ab | Método de limpieza y/o desinfección de una matriz de separación |
| US10889615B2 (en) | 2016-05-11 | 2021-01-12 | Cytiva Bioprocess R&D Ab | Mutated immunoglobulin-binding polypeptides |
| US10654887B2 (en) | 2016-05-11 | 2020-05-19 | Ge Healthcare Bio-Process R&D Ab | Separation matrix |
| US12448411B2 (en) | 2016-09-30 | 2025-10-21 | Cytiva Bioprocess R&D Ab | Separation method |
| PH12021552079A1 (en) * | 2019-02-27 | 2022-07-18 | Daewoong Pharmaceutical Co Ltd | Albumin-bound composition including lrrd2 of slit3 protein for prevention or treatment of bone-related diseases |
| CN114401982A (zh) * | 2019-04-23 | 2022-04-26 | 加利福尼亚大学董事会 | 可用于促进产奶的组合物和方法 |
| TW202511284A (zh) * | 2023-09-14 | 2025-03-16 | 大陸商北京拓界生物醫藥科技有限公司 | 包含robo結構域的蛋白及其醫藥用途 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130273049A1 (en) * | 2010-12-23 | 2013-10-17 | Sanofi | Robo1-fc fusion protein for use in the treatment of hepatocarcinoma |
| AU2011347250B2 (en) * | 2010-12-23 | 2015-06-04 | Sanofi | Robo1-Fc fusion protein for use in the treatment of hepatocarcinoma |
| US9572879B2 (en) | 2012-01-05 | 2017-02-21 | Boston Medical Center Corporation | ROBO2 inhibitory compositions comprising SLIT2-binding extracellular domain of ROBO2 |
| US10358677B2 (en) | 2012-01-05 | 2019-07-23 | Boston Medical Center Corporation | Method for treating kidney disease with a SLIT2-binding extracellular domain of ROBO2 |
| US10906955B2 (en) | 2017-06-02 | 2021-02-02 | Pfizer Inc. | Recombinant ROBO2 proteins, compositions, methods and uses thereof |
| US11970524B2 (en) | 2017-06-02 | 2024-04-30 | Pfizer Inc. | Recombinant ROBO2 proteins, compositions, methods and uses thereof |
| US11406682B2 (en) | 2017-08-24 | 2022-08-09 | Bar-Ilan University | Roundabout (Robo) receptor inhibitors and uses thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TN2012000473A1 (fr) | 2014-01-30 |
| PE20130199A1 (es) | 2013-03-09 |
| NI201200155A (es) | 2013-02-05 |
| CR20120508A (es) | 2012-11-01 |
| PH12012502044A1 (en) | 2017-07-26 |
| MX2012011822A (es) | 2012-11-12 |
| EA201291044A1 (ru) | 2013-04-30 |
| AR080891A1 (es) | 2012-05-16 |
| FR2958936A1 (fr) | 2011-10-21 |
| AU2011239839B2 (en) | 2015-08-20 |
| JP5858442B2 (ja) | 2016-02-10 |
| JP2013523172A (ja) | 2013-06-17 |
| CA2796303A1 (fr) | 2011-10-20 |
| KR20130059329A (ko) | 2013-06-05 |
| SG184529A1 (en) | 2012-11-29 |
| IL222382A (en) | 2016-06-30 |
| US9493529B2 (en) | 2016-11-15 |
| US20130039912A1 (en) | 2013-02-14 |
| GT201200275A (es) | 2014-01-24 |
| AU2011239839A1 (en) | 2012-11-08 |
| MA34221B1 (fr) | 2013-05-02 |
| EP2558489A1 (fr) | 2013-02-20 |
| IL222382A0 (en) | 2012-12-31 |
| UY33334A (es) | 2011-12-01 |
| ECSP12012230A (es) | 2012-11-30 |
| BR112012026020A2 (pt) | 2016-06-28 |
| CL2012002879A1 (es) | 2013-03-22 |
| DOP2012000265A (es) | 2013-02-28 |
| CN102884076A (zh) | 2013-01-16 |
| TW201142024A (en) | 2011-12-01 |
| MX338981B (es) | 2016-05-06 |
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