WO2020247623A1 - Non-human animals having a limited lambda light chain repertoire expressed from the kappa locus and uses thereof - Google Patents

Non-human animals having a limited lambda light chain repertoire expressed from the kappa locus and uses thereof Download PDF

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Publication number
WO2020247623A1
WO2020247623A1 PCT/US2020/036114 US2020036114W WO2020247623A1 WO 2020247623 A1 WO2020247623 A1 WO 2020247623A1 US 2020036114 W US2020036114 W US 2020036114W WO 2020247623 A1 WO2020247623 A1 WO 2020247623A1
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Prior art keywords
human
light chain
chain variable
rodent
human immunoglobulin
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PCT/US2020/036114
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English (en)
French (fr)
Inventor
John Mcwhirter
Johanna Hansen
Robert Babb
Chunguang GUO
Lynn Macdonald
Andrew J. Murphy
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Regeneron Pharmaceuticals Inc
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Regeneron Pharmaceuticals Inc
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Priority to CN202080040135.4A priority Critical patent/CN113874511A/zh
Priority to IL288516A priority patent/IL288516B2/en
Priority to MX2021014893A priority patent/MX2021014893A/es
Priority to BR112021023683A priority patent/BR112021023683A2/pt
Priority to EP20750000.0A priority patent/EP3979790B1/en
Priority to US17/616,295 priority patent/US20220330532A1/en
Priority to KR1020217041822A priority patent/KR20220016880A/ko
Priority to JP2021571945A priority patent/JP2022535418A/ja
Priority to AU2020289554A priority patent/AU2020289554A1/en
Priority to SG11202111258TA priority patent/SG11202111258TA/en
Application filed by Regeneron Pharmaceuticals Inc filed Critical Regeneron Pharmaceuticals Inc
Priority to IL324580A priority patent/IL324580A/en
Priority to CA3136478A priority patent/CA3136478A1/en
Publication of WO2020247623A1 publication Critical patent/WO2020247623A1/en
Anticipated expiration legal-status Critical
Priority to JP2025108133A priority patent/JP2025138773A/ja
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
    • A01K67/027—New or modified breeds of vertebrates
    • A01K67/0275—Genetically modified vertebrates, e.g. transgenic
    • A01K67/0276—Knock-out vertebrates
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
    • A01K67/027—New or modified breeds of vertebrates
    • A01K67/0275—Genetically modified vertebrates, e.g. transgenic
    • A01K67/0278—Knock-in vertebrates, e.g. humanised vertebrates
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/06—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies from serum
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
    • C12N15/85—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells
    • C12N15/8509—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells for producing genetically modified animals, e.g. transgenic
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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    • C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
    • C12N5/06—Animal cells or tissues; Human cells or tissues
    • C12N5/0602—Vertebrate cells
    • C12N5/0603—Embryonic cells ; Embryoid bodies
    • C12N5/0606—Pluripotent embryonic cells, e.g. embryonic stem cells [ES]
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K2207/00—Modified animals
    • A01K2207/15—Humanized animals
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K2217/00—Genetically modified animals
    • A01K2217/05—Animals comprising random inserted nucleic acids (transgenic)
    • A01K2217/054—Animals comprising random inserted nucleic acids (transgenic) inducing loss of function
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K2217/00—Genetically modified animals
    • A01K2217/07—Animals genetically altered by homologous recombination
    • A01K2217/072—Animals genetically altered by homologous recombination maintaining or altering function, i.e. knock in
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K2217/00—Genetically modified animals
    • A01K2217/15—Animals comprising multiple alterations of the genome, by transgenesis or homologous recombination, e.g. obtained by cross-breeding
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K2227/00—Animals characterised by species
    • A01K2227/10—Mammal
    • A01K2227/105—Murine
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K2267/00—Animals characterised by purpose
    • A01K2267/01—Animal expressing industrially exogenous proteins
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/10—Immunoglobulins specific features characterized by their source of isolation or production
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/10—Immunoglobulins specific features characterized by their source of isolation or production
    • C07K2317/14—Specific host cells or culture conditions, e.g. components, pH or temperature
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
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    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/21—Immunoglobulins specific features characterized by taxonomic origin from primates, e.g. man
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific
    • C—CHEMISTRY; METALLURGY
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    • C12N2510/00—Genetically modified cells
    • C—CHEMISTRY; METALLURGY
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    • C12N2517/00—Cells related to new breeds of animals
    • C12N2517/02—Cells from transgenic animals

Definitions

  • Human antibodies are the most rapidly growing class of therapeutics.
  • genetically engineered animals e.g., rodents
  • genetic material encoding human antibodies in whole or in part, has revolutionized the field of human therapeutic monoclonal antibodies for the treatment of various diseases.
  • development of improved in vivo systems for generating human monoclonal antibodies that maximize human antibody repertoires in host genetically engineered animals is needed.
  • the present disclosure provides a population of B cells from a single, genetically modified rodent as described herein.
  • all antibodies expressed by the population of B cells include human immunoglobulin l light chain variable domains expressed from a single rearranged human immunoglobulin l light chain variable region or a somatically hypermutated version thereof.
  • antibodies expressed by the population of B cells include a plurality of human immunoglobulin heavy chain variable domains expressed from at least two different rearranged human immunoglobulin heavy chain variable regions or somatically hypermutated version thereof.
  • a human Il gene segment is selected from a group consisting of: Il ⁇ , Il2, Il3, Il6, and Il7. In some embodiments, a human Il gene segment is selected from a group consisting of: Il ⁇ , Il2, Il3, and Il7. In some embodiments, a human Vk gene segment is V l - 51 or Ul2-14. In some embodiments, a human Il gene segment is Il2. [0037] In some embodiments, a stem cell (e.g., ES cell) comprises an engineered endogenous immunoglobulin heavy chain locus comprising one or more unrearranged human VH gene segments, one or more unrearranged human DH gene segments, and one or more unrearranged human JH gene segments operably linked to one or more endogenous
  • immunoglobulin heavy chain constant region genes are immunoglobulin heavy chain constant region genes.
  • a method for making a nucleotide sequence encoding a human immunoglobulin heavy chain comprises the steps of (a) exposing a genetically modified rodent as described herein to an antigen of interest; (b) obtaining a human immunoglobulin heavy chain variable region encoding a human immunoglobulin heavy chain variable domain sequence of an antibody that specifically binds the antigen and that was generated by the genetically modified rodent; and (c) operably linking the human immunoglobulin heavy variable region to a human immunoglobulin heavy chain constant region sequence to form a nucleotide sequence encoding a human immunoglobulin heavy chain.
  • a nucleotide sequence encoding a human immunoglobulin heavy chain generated by the method of this paragraph is provided.
  • a human Vk gene segment is selected from a group consisting of: Vk4-69, Vk8-61, Vk4-60, Vk6-57, VklO-54, Vk5-52, Vkl-51, Vk9-49, Vkl-47, Vk7-46, Vk5-45, Vkl-44, Vk7-43, Vkl-40, Vk5-37, Vkl-36, Vk3-27, Vk3-25, Vk2-23, Vk3- 22, Vk3-21, Vk3-19, Vk2-18, Vk3-16, Vk2-14, Vk3-12, Vk2-l l, Vk3-10, Vk3-9, Vk2-8, Vk4- 3, and Vk3-1.
  • FRT indicates a Frt recombinase system site
  • UB-NEO indicates a neomycin resistant gene with a UB promoter
  • Es indicates an intronic enhancer
  • 3 ⁇ indicates a 3' enhancer
  • SD indicates a splice donor site.
  • Het indicates a heterozygous mouse
  • “ho” indicates a homozygous mouse.
  • Figure 6 shows an illustration, not to scale, of the insertion of Targeting Vector D (as described in Example 10) into an engineered IgK light chain locus of a rodent embryonic stem (ES) cell clone (as described in Example 11), which ES cell clone was used in generating an embodiment of the rodent according to the present disclosure. Included in the illustration are the approximate positions of various probes (indicated by circled dash marks) used for confirming that embryonic stem (ES) cell clones are positive for certain exemplary sequences. Unless labeling in the diagram suggests otherwise (e.g., as for selection cassettes, loxP sites, etc.), filled shapes and single lines represent mouse sequences, and empty shapes and double lines represent human sequences.
  • Figure 16 shows an amino acid sequence of a rearranged nl2-14/Il2 variable domain including a signal peptide (SEQ ID NO: 39). The italicized, bold text indicates the sequence of a signal peptide.
  • Immunoglobulins are large (-150 kD), Y-shaped glycoproteins that are produced by B cells of a host immune system to neutralize pathogens (e.g., viruses, bacteria, etc.).
  • Each immunoglobulin (Ig) is composed of two identical heavy chains and two identical light chains, each of which has two structural components: a variable domain and a constant domain.
  • the heavy and light chain variable regions differ in antibodies produced by different B cells, but are the same for all antibodies produced by a single B cell or B cell clone.
  • the heavy and light chain variable regions of each antibody together comprise the antigen-binding region (or antigen-binding site).
  • Isotypes confer specialized biological properties on the antibody due to the different structural characteristics among the different isotypes and are found in different locations (cells, tissues, etc.) within an animal body.
  • B cells produce IgM and IgD with identical antigen-binding regions.
  • B cells switch to different isotypes by a process referred to as class switching, which involves a change of the constant region of the antibody produced by the B cell while the variable regions remain the same, thereby preserving antigen specificity of the original antibody (B cell).
  • mice having engineered immunoglobulin k light chain loci harboring human nl and 1l gene segments demonstrated a human lambda to endogenous lambda ratio (as measured by IgCt to IgCk ratio) of about 1 : 1 in the splenic compartment (see, e.g., Table 4 of U.S. Patent No. 9,006,511, which is incorporated herein by reference in its entirety).
  • both engineered mouse strains i.e., engineered immunoglobulin k or engineered immunoglobulin l light chain loci
  • human nl domains could be expressed from endogenous immunoglobulin light chain loci in rodents, which normally display a large bias in light chain expression (see above).
  • the two unrearranged human Vk gene segments are selected from the group consisting of Vk5-52, Vkl- 51, Vk9-49, Vkl-47, Vk7-46, Vk5-45, Vkl-44, Vk7-43, Vkl-40, Vk5-37, Vkl-36, Vk3-27, Vk3-25, Vk2-23, Vk3-22, Vk3-21, Vk3-19, Vk2-18, Vk3-16, Vk2-14, Vk3-12, Vk2-l l, Vk3- 10, Vk3-9, Vk2-8, Vk4-3, and Vk3-1.
  • unrearranged human Il gene segments are Jkl, Jk2, J/J, Jk6, and J/J
  • the one unrearranged human YX gene segment is V 2-14
  • the five unrearranged human JX gene segments are Jkl, JX2, JX3, JX6, and 3X7.
  • immunoglobulin l light chain variable domains expressed from the single rearranged human immunoglobulin l light chain variable region or a somatically hypermutated version thereof.
  • a human CX gene comprises a sequence that is 80% to
  • a non-human animal e.g., rodent, e.g., rat or mouse
  • non human e.g., rodent, e.g., rat or mouse
  • non-human e.g., rodent, e.g., rat or mouse
  • tissue described herein includes an Adam6 gene in its genome (e.g., its germline genome), which encodes an ADAM6 polypeptide, functional ortholog, functional homolog, or functional fragment thereof (see, e.g., U.S. Patent Nos. 8,642,835 and 8,697,940, each of which is incorporated herein by reference in its entirety).
  • an engineered endogenous immunoglobulin k light chain locus comprises a single rearranged human immunoglobulin l light chain variable region that includes a human nl gene segment selected from the group consisting of: nl4-69, nl8-61, nl4-60, VX6-57, nl10-54, nl5-52, nl1-51, nl9-49, nl1-47, nl7-46, nl5-45, nl ⁇ - 44, nl7-43, nl1-40, nl5-37, nl1-36, VX3-27, VX3-25 , VX2-23, VX3-22 , nl3-21, nl3-19, Ul2-18, Ul3-16, Ul2-14, Ul3-12, Ul2-11, Ul3-10, Ul3-9, Ul2-8, Ul4-3, and Ul3-1.
  • a human nl gene segment selected from the group consisting of: nl4-69, nl
  • Targeting vectors can be employed to introduce a nucleic acid construct into a target genomic locus.
  • Targeting vectors can comprise a nucleic acid construct and homology arms that flank said nucleic acid construct; those skilled in the art will be aware of a variety of options and features generally applicable to the design, structure, and/or use of targeting vectors.
  • targeting vectors can be in linear form or in circular form, and they can be single- stranded or double-stranded.
  • Targeting vectors can be deoxyribonucleic acid (DNA) or ribonucleic acid (RNA).
  • homology arms are referred to herein as 5’ and 3’ (i.e., upstream and downstream) homology arms.
  • methods include multiple insertions in a single ES cell clone. In some embodiments, methods include sequential insertions made in a successive ES cell clones. In some embodiments, methods include a single insertion made in an engineered ES cell clone.
  • targeting vectors as described herein are incorporated into a wild-type immunoglobulin k light chain locus in the germline genome of a non-human (e.g., rodent, e.g., rat or mouse) cell that further contains human VH, DH and JH genomic DNA (e.g., containing a plurality of human VH, DH and JH gene segments) operably linked with one or more immunoglobulin heavy chain constant region genes (e.g., see Macdonald (2014), U.S. Patent Nos. 6,596,541, 8,642,835, 8,697,940 and 8,791,323, each of which is incorporated herein by reference in its entirety).
  • targeting vectors as described herein are incorporated into a modified or engineered
  • a method of making a genetically modified non-human animal comprises engineering an endogenous immunoglobulin k light chain locus in the germline genome of the non-human animal to comprise a single rearranged human immunoglobulin l light chain variable region operably linked to a non-human Ck gene segment, wherein the single rearranged human immunoglobulin l light chain variable region comprises a human Vk gene segment and a human Jk gene segment, so that all immunoglobulin k light chains expressed by B cells of the genetically modified non-human animal include human immunoglobulin k light chain variable domains expressed from the single rearranged human immunoglobulin k light chain variable region or a somatically hypermutated version thereof.
  • rodent e.g., rat or mouse
  • the genome of a non-human animal as described herein further comprises one or more human immunoglobulin heavy variable regions as described in Macdonald (2014), U.S. Patent Nos. 6,596,541, 8,642,835, 8,697,940 and 8,791,323, each of which is incorporated herein by reference in its entirety.
  • non-human animals e.g., rodents, e.g., rats or mice
  • non-human cells e.g., rodent, e.g., rat or mouse
  • non-human tissues described herein can be used in methods of making antibodies.
  • Antibodies made in accordance with the present disclosure can include, for example, human antibodies, chimeric antibodies, reverse chimeric antibodies, fragments of any of these antibodies, or combinations thereof.
  • non-human (e.g., rodent, e.g., rat or mouse) cells as described here may be employed for methods of making a bispecific antibody, the method comprising: (a) expressing in a non-human cell: (i) a first nucleotide sequence comprising a first human immunoglobulin heavy chain variable region operably linked to a first human
  • a human heavy chain variable domain is encoded by a rearranged human heavy chain variable region comprising a human VH3-74, VH3-73, VH3-72, VH2-70, VH1 -69, VH3-66, VH3-64, VH4-61 , VH4-59, VH1 -58, VH3-53, VH5-51 , VH3-49, VH3-48, VH1 -46, VH1 -45, VH3-43, VH4-39, VH4-34, VH3-33, VH4-3 1 , VH3-30, VH4-28, VH2-26, VH1 -24, VH3-23, VH3-21 , VH3-20, VH1 -18, VH3-15, VH3-13, VH3- 1 1 , VH3-9, VH1 -8, VH3-7, VH2-5, VH7-4- 1
  • a non-human animal e.g., rodent, e.g., rat or mouse
  • non human e.g., rodent, e.g., rat or mouse
  • non-human e.g., rodent, e.g., rat or mouse
  • tissue as described herein is provided for use in the manufacture of a medicament for the treatment, prevention or amelioration of a disease, disorder or condition.
  • an antigen-binding protein as described herein where human nl and VH sequences are derived from mice described herein that have been immunized with an antigen comprising an epitope of interest or antigen of interest.
  • compositions suitable for administration to humans are principally directed to pharmaceutical compositions that are suitable for ethical administration to humans, it will be understood by the skilled artisan that such compositions are generally suitable for administration to animals of all sorts. Modification of pharmaceutical compositions suitable for administration to humans in order to render the compositions suitable for administration to various animals is well understood, and the ordinarily skilled veterinary pharmacologist can design and/or perform such modification with routine, if any, experimentation.
  • compositions in accordance with the disclosure will vary, depending upon the identity, size, and/or condition of the subject treated and further depending upon the route by which the composition is to be administered.
  • a composition may comprise between 0.1% and 100% (w/w) active ingredient.
  • Example 7 Generation of a Targeting Vector Including a Rearranged Human nl2-14/Gl2 and a Mouse CK
  • a rearranged human Vk2- 14/Jk2 was made using standard molecular biology techniques recognized in the art.
  • the human nl2-14 gene segment and human JX2 gene segment included in the rearranged human Vk2- 14/JX2 had a human nl2-14 germline sequence and a human Il2 germline sequence, respectively.
  • Targeting Vector C contains, from 5’ to 3’, an ⁇ 23 kb 5’ mouse homology arm derived from BAC CT7-302gl2, a Frt-Ub-Neo-Frt cassette, an Ascl site, 2kb of the human nl ⁇ - 51 promoter region, a human nl1-51 5’ UTR, a coding sequence of exon 1 of nl2-14 gene segment (which includes a sequence encoding a leader peptide), intron 1 of a human nl2-14 gene segment, a rearranged human nl2-14/Il2 variable sequence including a second exon of a human nl2-14 gene segment and a JV2 gene segment, the first 412bp of the human JK5-CK intron (including the JK5 splice site), a PI-SceI site, and an ⁇ 75kb 3’ mouse homology arm derived from BAC CT7-254m04, which includes ⁇ 2.4k
  • Targeting Vector C is electroporated into mouse ES cells in which the
  • Targeting Vector D is identical to Targeting Vector C, except that the mouse CK was replaced with a mouse C I and a loxP-Ub-Hyg-loxP cassette was inserted downstream of the CK poly A signal.
  • Targeted ES cells described in Example 11 above are used as donor ES cells and introduced into an 8-cell stage mouse embryo by the VELOCIMOUSE® method (see, e.g., US Pat. No. 7,294,754 and Poueymirou et al. (2007) F0 generation mice that are essentially fully derived from the donor gene-targeted ES cells allowing immediate phenotypic analyses, Nature Biotech. 25(1): 91-99, each of which are incorporated herein by reference).
  • VELOCIMICE® bearing an engineered endogenous k light chain locus including a rearranged human VX2- 14/JX2 and a mouse CXI are identified by genotyping using a modification of allele assay (see

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AU2020289554A AU2020289554A1 (en) 2019-06-05 2020-06-04 Non-human animals having a limited lambda light chain repertoire expressed from the kappa locus and uses thereof
MX2021014893A MX2021014893A (es) 2019-06-05 2020-06-04 Animales no humanos que tienen un repertorio de cadena ligera lambda limitado expresado a partir del locus kappa y usos de estos.
BR112021023683A BR112021023683A2 (pt) 2019-06-05 2020-06-04 Roedor e camundongo geneticamente modificado, embrião de roedor, célula b do roedor ou camundongo geneticamente modificado, hibridoma, população de células b, célula-tronco embrionária, célula de mamífero, métodos de produção de um anticorpo, de uma cadeia pesada, de um domínio variável, de uma coleção de domínios variáveis, de uma cadeia leve, de uma sequência nucleotídica, de um roedor geneticamente modificado e de células es, de geração de um domínio variável e in vitro para gerar uma célula recombinante de roedor, e, vetor de direcionamento
EP20750000.0A EP3979790B1 (en) 2019-06-05 2020-06-04 Rodents having a limited lambda light chain repertoire expressed from the kappa locus and uses thereof
US17/616,295 US20220330532A1 (en) 2019-06-05 2020-06-04 Non-human animals having a limited lambda light chain repertoire expressed from the kappa locus and uses thereof
KR1020217041822A KR20220016880A (ko) 2019-06-05 2020-06-04 카파 유전자좌에서 발현된 제한적 람다 경쇄 레퍼토리를 갖는 비-인간 동물 및 이의 용도
JP2021571945A JP2022535418A (ja) 2019-06-05 2020-06-04 カッパ遺伝子座から発現される限られたラムダ軽鎖レパートリーを有する非ヒト動物及びその使用
CN202080040135.4A CN113874511A (zh) 2019-06-05 2020-06-04 具有从κ基因座表达的有限λ轻链谱系的非人类动物和其用途
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US20250185635A1 (en) * 2022-03-21 2025-06-12 Biocytogen Pharmaceuticals (Beijing) Co., Ltd. Genetically modified non-human animals with humanized immunoglobulin and mhc loci
CN117986356B (zh) * 2022-10-27 2025-07-22 纽迈生物科技(苏州)有限公司 一种制备抗体的方法
AU2024354039A1 (en) * 2023-09-26 2026-02-19 Biocytogen Pharmaceuticals (Beijing) Co., Ltd. Genetically modified non-human animals with humanized immunoglobulin locus
CN121065267A (zh) * 2024-06-04 2025-12-05 赛业（苏州）生物科技有限公司 用于制备四元固定轻链的基因修饰的啮齿动物及其制备方法
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WO2022056276A1 (en) 2020-09-11 2022-03-17 Regeneron Pharmaceuticals, Inc. Identification and production of antigen-specific antibodies
WO2022132943A1 (en) 2020-12-16 2022-06-23 Regeneron Pharmaceuticals, Inc. Mice expressing humanized fc alpha receptors
WO2024155620A1 (en) * 2023-01-18 2024-07-25 Gilead Sciences, Inc. Human immunoglobulin binary light chain transgene constructs and uses thereof
WO2026019824A1 (en) * 2024-07-16 2026-01-22 Gilead Sciences, Inc. Human immunoglobulin common light chain transgene constructs and uses thereof
WO2026035843A2 (en) 2024-08-06 2026-02-12 Regeneron Pharmaceuticals, Inc. Non-human animals having modified immunoglobulin heavy chain constant region locus and uses thereof

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