Cells and methods for the generation of transgenic pigs
First Claim
1. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on feeder cells for a time sufficient to obtain undifferentiated porcine primordial germ cells, said feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed are methods for the isolation of primordial germ cells, culturing these cells to produce primordial germ cell-derived cell lines, methods for transforming both the primordial germ cells and the cultured cell lines, and using these transformed cells and cell lines to generate transgenic animals. The efficiency at which transgenic animals are generated by the present invention is greatly increased, thereby allowing the use of homologous recombination in producing transgenic non-rodent animal species.
185 Citations
69 Claims
-
1. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on feeder cells for a time sufficient to obtain undifferentiated porcine primordial germ cells, said feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
30. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on STO feeder cells for a time sufficient to obtain undifferentiated porcine primordial germ cells, said STO feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor.
-
31. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on feeder cells for a time sufficient to obtain undifferentiated porcine primordial germ cells, said feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, said culture medium including no exogenously added soluble stem cell factor.
-
32. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on feeder cells for a time sufficient to obtain undifferentiated porcine primordial germ cells, said feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, said culture medium including no exogenously added leukemia inhibitory factor.
-
33. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on feeder cells for a time sufficient to obtain undifferentiated porcine primordial germ cells, said feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, said culture medium including no exogenously added soluble stem cell factor or leukemia inhibitory factor.
-
34. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on feeder cells other than S1/S14 or S1-m220 for a time sufficient to obtain undifferentiated porcine primordial germ cells, said feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor.
-
35. A method of growing porcine primordial germ cells, comprising growing a cell culture comprising porcine primordial germ cells from an embryo of a pig on feeder cells other than S1/S14 or S1-m220 for a time sufficient to obtain undifferentiated porcine primordial germ cells, said feeder cells at a density of between about 2.5×
- 105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, said culture medium including no exogenously added soluble stem cell factor or leukemia inhibitory factor.
-
36. A method of preparing a porcine primordial germ cell-derived cell line, comprising:
-
a) plating a cell culture comprising porcine primordial germ cells on feeder cells, said feeder cells at a density of between about 2.5×
10 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor; and
b) culturing the plated porcine primordial germ cells for a period of time effective to provide a porcine primordial germ cell-derived cell line.
-
-
37. A method of preparing porcine primordial germ cells that contain a selected DNA segment, comprising:
-
a) introducing said selected DNA segment into a composition comprising porcine primordial germ cells to obtain candidate porcine primordial germ cells that contain said selected DNA segment; and
b) plating said candidate porcine primordial germ cells that contain said selected DNA segment on feeder cells, said feeder cells at a density of between about 2.5×
105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, to obtain said porcine primordial germ cells that contain said selected DNA segment.- View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
-
-
55. A method of producing a transgenic pig, comprising:
-
a) introducing a selected DNA segment into a cell culture comprising porcine primordial germ cells to obtain candidate porcine primordial germ cells that contain said selected DNA segment;
b) plating said candidate porcine primordial germ cells that contain said selected DNA segment on feeder cells, said feeder cells at a density of between about 2.5×
105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, to obtain undifferentiated porcine primordial germ cells that contain said selected DNA segment; and
c) generating a transgenic pig from said undifferentiated porcine primordial germ cells that contain said selected DNA segment, wherein said selected DNA segment is contained and expressed in somatic and germ cells of said transgenic pig. - View Dependent Claims (56, 57, 58, 59, 60, 61)
(a) injecting said undifferentiated porcine primordial germ cells that contain said selected DNA segment into a blastocyst from a pig;
(b) transferring said blastocyst into a synchronized recipient female pig to produce a pregnant pig; and
(c) allowing gestation in said pregnant pig to proceed for a period of time sufficient to allow the development of a viable transgenic pig.
-
-
58. The method of claim 55, wherein said transgenic pig is generated by a method comprising;
-
(a) isolating a nucleus from said undifferentiated porcine primordial germ cells that contain said selected DNA segment and injecting said nucleus into an enucleated oocyte from a pig;
(b) transferring said oocyte into a synchronized recipient female pig to produce a pregnant pig; and
(c) allowing gestation in said pregnant pig to proceed for a period of time sufficient to allow the development of a viable transgenic pig.
-
-
59. The method of claim 55, wherein said transgenic pig is generated by a method comprising:
-
(a) aggregating said undifferentiated porcine primordial germ cells that contain said selected DNA segment with an early stage embryo of a pig;
(b) transferring said embryo into a synchronized recipient female pig to produce a pregnant pig; and
(c) allowing gestation in said pregnant pig to proceed for a period of time sufficient to allow the development of a viable transgenic pig.
-
-
60. The method of claim 55, wherein said selected DNA segment comprises at least a first coding region that encodes a protein selected from the group consisting of an interleukin, collagen, interferon, blood protein, hormone, growth factor, cytokine, enzyme, receptor, binding protein, immune system protein, antigen, muscle protein and an oncogene receptor.
-
61. The method of claim 60, wherein said selected DNA segment comprises at least a first coding region that encodes a protein selected from the group consisting of SREHP, GP63, actinobacillus, pleuropneumoniae, pseudomonas aeruynosa, OprF, myelin basic protein, insulin, hCD59, DAF (CD55), factor IX, urokinase, α
- -antitrypsin, tissue plasminogen activator, protein C, activin, adenosine deaminase, angiotensinogen 1, antithrombin III, alpha I antitrypsin, apolipoprotein A-I, apolipoprotein A-II, apolipoprotein C-I, apolipoprotein C-II, apolipoprotein C-III, apolipoprotein E, atrial natriuretic factor, chorionic gonadotropin, alpha chain, beta chain, pro (rennin) chymosir, factor B complement, complement C2, complement C3, complement C4, complement C9, corticotropin releasing factor, epidermal growtih factor, c-erb B, epoxide dehydratase, erythropoietin, C1 esterase inhibitor, factor VIII, factor IX, Christmas factor, factor X, fibrinogen A alpha, gamma B beta, gastrin releasing peptide, prepro glucagon, growth hormone, RF growth hormone, somatocrinin, hemopexin, inhibin, prepro insulin, insulin-like growth factor I, insulin-like growth factor II, alpha interferon, multiple leukocyte, fibroblast beta interferon, gamma interferon, interleukin-1, T-cell interleukin-2, growth factor, interleukin-3, two forms kininogen, beta subunit leuteinizing hormone, leuteinizing hormone, releasing hormone, lymphotoxin, mast cell growth factor, beta subunit nerve growth factor, PGDF c-sis oncogene, chain A. pancreatic polypeptide, icosapeptide, parathyroid hormone, prepro plasminogen, plasminogen activator, prolactini, proopiomelanocortin, protein C, prothrombin, relaxin, prepro renin, somatostatin, prepro tachykinin, substance P, substance K, urokinase and prepro vasoactive intestinal peptide protein.
-
62. A cell culture comprising:
-
(a) porcine primordial germ cells;
(b) feeder cells sufficient to achieve a density of between about 2.5×
105 cells/cm2 and about 106 feeder cells/cm2; and
(c) basic fibroblast growth factor in an amount effective to promote the growth and continued proliferation of said porcine primordial germ cells. - View Dependent Claims (63, 64, 65)
-
-
66. A kit comprising, in suitable container means:
-
(a) porcine primordial germ cells;
(b) feeder cells sufficient to achieve a density of between about 2.5×
105 cells/cm2 and about 106 feeder cells/cm2; and
(c) basic fibroblast growth factor in an amount effective to promote the growth and continued proliferation of said porcine primordial germ cells.
-
-
67. A method of preparing a porcine blastocyst that contains a selected DNA segment, comprising:
-
a) introducing said selected DNA segment into a cell culture comprising porcine primordial germ cells to obtain candidate porcine primordial germ cells that contain said selected DNA segment;
b) plating said candidate porcine primordial germ cells that contain said selected DNA segment on feeder cells, said feeder cells at a density of between about 2.5×
105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, to obtain undifferentiated porcine primordial germ cells that contain said selected DNA segment; and
c) injecting said undifferentiated porcine primordial germ cells that contain said selected DNA segment into a porcine blastocyst, thereby preparing a porcine blastocyst that contains said selected DNA segment.
-
-
68. A method of preparing a porcine oocyte that contains a selected DNA segment, comprising:
-
a) introducing said selected DNA segment into a cell culture comprising porcine primordial germ cells to obtain candidate porcine primordial germ cells that contain said selected DNA segment;
b) plating said candidate porcine primordial germ cells that contain said selected DNA segment on feeder cells, said feeder cells at a density of between about 2.5×
105 cells/cm2 and about 106 cells/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, to obtain undifferentiated porcine primordial germ cells that contain said selected DNA segment;
c) isolating a nucleus from said undifferentiated porcine primordial germ cells that contain said selected DNA segment; and
d) injecting said nucleus into an enucleated porcine oocyte, thereby preparing a porcine oocyte that contains said selected L)NA segment.
-
-
69. A method of preparing an early stage porcine embryo that contains a selected DNA segment, comprising:
-
a) introducing a selected DNA segment into a cell culture comprising porcine primordial germ cells to obtain candidate porcine primordial germ cells that contain said selected DNA segment;
b) plating said candidate porcine primordial germ cells that contain said selected DNA segment on feeder cells, said feeder cells at a density of between about 2.5×
105 cells/cm2 and about 106 cell/cm2, in a culture medium comprising an effective amount of basic fibroblast growth factor, to obtain undifferentiated porcine primordial germ cells that contain said selected DNA segment; and
c) aggregating said undifferentiated porcine primordial germ cells that contain said selected DNA segment with an early stage porcine embryo, thereby preparing an early stage porcine embryo that contains said selected DNA segment.
-
Specification