Abstract
Gene targeting allows precise, predetermined changes to be made in a chosen gene in the mouse genome. To date, targeting has been used most often for generation of animals completely lacking the product of a gene of interest. The resulting "knockout" mice have confirmed some hypotheses, have upset others, but have rarely been uninformative. Models of several human genetic diseases have been produced by targeting--including Gaucher disease, cystic fibrosis, and the fragile X syndrome. These diseases are primarily determined by defects in single genes, and their modes of inheritance are well understood. When the disease under study has a complex etiology with multiple genetic and environmental components, the generation of animal models becomes more difficult but no less valuable. The problems associated with dissecting out the individual genetic factors also increases substantially and the distinction between causation and correlation is often difficult. To prove causation in a complex system requires rigorous adherence to the principle that the experiments must allow detection of the effects of changing only a single variable at one time. Gene targeting experiments, when properly designed, can test the effects of a precise genetic change completely free from the effects of differences in any other genes (linked or unlinked to the test gene). They therefore allow proofs of causation.
Full text
PDFImages in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Brown M. S., Goldstein J. L. A receptor-mediated pathway for cholesterol homeostasis. Science. 1986 Apr 4;232(4746):34–47. doi: 10.1126/science.3513311. [DOI] [PubMed] [Google Scholar]
- Buja L. M., Kita T., Goldstein J. L., Watanabe Y., Brown M. S. Cellular pathology of progressive atherosclerosis in the WHHL rabbit. An animal model of familial hypercholesterolemia. Arteriosclerosis. 1983 Jan-Feb;3(1):87–101. doi: 10.1161/01.atv.3.1.87. [DOI] [PubMed] [Google Scholar]
- Ghiselli G., Schaefer E. J., Gascon P., Breser H. B., Jr Type III hyperlipoproteinemia associated with apolipoprotein E deficiency. Science. 1981 Dec 11;214(4526):1239–1241. doi: 10.1126/science.6795720. [DOI] [PubMed] [Google Scholar]
- Gordon T., Castelli W. P., Hjortland M. C., Kannel W. B., Dawber T. R. High density lipoprotein as a protective factor against coronary heart disease. The Framingham Study. Am J Med. 1977 May;62(5):707–714. doi: 10.1016/0002-9343(77)90874-9. [DOI] [PubMed] [Google Scholar]
- Hilbert P., Lindpaintner K., Beckmann J. S., Serikawa T., Soubrier F., Dubay C., Cartwright P., De Gouyon B., Julier C., Takahasi S. Chromosomal mapping of two genetic loci associated with blood-pressure regulation in hereditary hypertensive rats. Nature. 1991 Oct 10;353(6344):521–529. doi: 10.1038/353521a0. [DOI] [PubMed] [Google Scholar]
- Ishibashi S., Brown M. S., Goldstein J. L., Gerard R. D., Hammer R. E., Herz J. Hypercholesterolemia in low density lipoprotein receptor knockout mice and its reversal by adenovirus-mediated gene delivery. J Clin Invest. 1993 Aug;92(2):883–893. doi: 10.1172/JCI116663. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ishibashi S., Goldstein J. L., Brown M. S., Herz J., Burns D. K. Massive xanthomatosis and atherosclerosis in cholesterol-fed low density lipoprotein receptor-negative mice. J Clin Invest. 1994 May;93(5):1885–1893. doi: 10.1172/JCI117179. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ito M., Oliverio M. I., Mannon P. J., Best C. F., Maeda N., Smithies O., Coffman T. M. Regulation of blood pressure by the type 1A angiotensin II receptor gene. Proc Natl Acad Sci U S A. 1995 Apr 11;92(8):3521–3525. doi: 10.1073/pnas.92.8.3521. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Jacob H. J., Lindpaintner K., Lincoln S. E., Kusumi K., Bunker R. K., Mao Y. P., Ganten D., Dzau V. J., Lander E. S. Genetic mapping of a gene causing hypertension in the stroke-prone spontaneously hypertensive rat. Cell. 1991 Oct 4;67(1):213–224. doi: 10.1016/0092-8674(91)90584-l. [DOI] [PubMed] [Google Scholar]
- Jeunemaitre X., Soubrier F., Kotelevtsev Y. V., Lifton R. P., Williams C. S., Charru A., Hunt S. C., Hopkins P. N., Williams R. R., Lalouel J. M. Molecular basis of human hypertension: role of angiotensinogen. Cell. 1992 Oct 2;71(1):169–180. doi: 10.1016/0092-8674(92)90275-h. [DOI] [PubMed] [Google Scholar]
- John S. W., Krege J. H., Oliver P. M., Hagaman J. R., Hodgin J. B., Pang S. C., Flynn T. G., Smithies O. Genetic decreases in atrial natriuretic peptide and salt-sensitive hypertension. Science. 1995 Feb 3;267(5198):679–681. doi: 10.1126/science.7839143. [DOI] [PubMed] [Google Scholar]
- Kim H. S., Krege J. H., Kluckman K. D., Hagaman J. R., Hodgin J. B., Best C. F., Jennette J. C., Coffman T. M., Maeda N., Smithies O. Genetic control of blood pressure and the angiotensinogen locus. Proc Natl Acad Sci U S A. 1995 Mar 28;92(7):2735–2739. doi: 10.1073/pnas.92.7.2735. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kurihara Y., Kurihara H., Suzuki H., Kodama T., Maemura K., Nagai R., Oda H., Kuwaki T., Cao W. H., Kamada N. Elevated blood pressure and craniofacial abnormalities in mice deficient in endothelin-1. Nature. 1994 Apr 21;368(6473):703–710. doi: 10.1038/368703a0. [DOI] [PubMed] [Google Scholar]
- Kurosaka D., Teramoto T., Matsushima T., Yokoyama T., Yamada A., Aikawa T., Miyamoto Y., Kurokawa K. Apolipoprotein E deficiency with a depressed mRNA of normal size. Atherosclerosis. 1991 May;88(1):15–20. doi: 10.1016/0021-9150(91)90252-x. [DOI] [PubMed] [Google Scholar]
- Li H., Reddick R. L., Maeda N. Lack of apoA-I is not associated with increased susceptibility to atherosclerosis in mice. Arterioscler Thromb. 1993 Dec;13(12):1814–1821. doi: 10.1161/01.atv.13.12.1814. [DOI] [PubMed] [Google Scholar]
- Mabuchi H., Itoh H., Takeda M., Kajinami K., Wakasugi T., Koizumi J., Takeda R., Asagami C. A young type III hyperlipoproteinemic patient associated with apolipoprotein E deficiency. Metabolism. 1989 Feb;38(2):115–119. doi: 10.1016/0026-0495(89)90249-7. [DOI] [PubMed] [Google Scholar]
- Nakashima Y., Plump A. S., Raines E. W., Breslow J. L., Ross R. ApoE-deficient mice develop lesions of all phases of atherosclerosis throughout the arterial tree. Arterioscler Thromb. 1994 Jan;14(1):133–140. doi: 10.1161/01.atv.14.1.133. [DOI] [PubMed] [Google Scholar]
- Paigen B., Morrow A., Brandon C., Mitchell D., Holmes P. Variation in susceptibility to atherosclerosis among inbred strains of mice. Atherosclerosis. 1985 Oct;57(1):65–73. doi: 10.1016/0021-9150(85)90138-8. [DOI] [PubMed] [Google Scholar]
- Panthier J. J., Holm I., Rougeon F. The mouse Rn locus: S allele of the renin regulator gene results from a single structural gene duplication. EMBO J. 1982;1(11):1417–1421. doi: 10.1002/j.1460-2075.1982.tb01332.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Piccini N., Knopf J. L., Gross K. W. A DNA polymorphism, consistent with gene duplication, correlates with high renin levels in the mouse submaxillary gland. Cell. 1982 Aug;30(1):205–213. doi: 10.1016/0092-8674(82)90026-5. [DOI] [PubMed] [Google Scholar]
- Plump A. S., Scott C. J., Breslow J. L. Human apolipoprotein A-I gene expression increases high density lipoprotein and suppresses atherosclerosis in the apolipoprotein E-deficient mouse. Proc Natl Acad Sci U S A. 1994 Sep 27;91(20):9607–9611. doi: 10.1073/pnas.91.20.9607. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Plump A. S., Smith J. D., Hayek T., Aalto-Setälä K., Walsh A., Verstuyft J. G., Rubin E. M., Breslow J. L. Severe hypercholesterolemia and atherosclerosis in apolipoprotein E-deficient mice created by homologous recombination in ES cells. Cell. 1992 Oct 16;71(2):343–353. doi: 10.1016/0092-8674(92)90362-g. [DOI] [PubMed] [Google Scholar]
- Pászty C., Maeda N., Verstuyft J., Rubin E. M. Apolipoprotein AI transgene corrects apolipoprotein E deficiency-induced atherosclerosis in mice. J Clin Invest. 1994 Aug;94(2):899–903. doi: 10.1172/JCI117412. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rapacz J., Hasler-Rapacz J., Taylor K. M., Checovich W. J., Attie A. D. Lipoprotein mutations in pigs are associated with elevated plasma cholesterol and atherosclerosis. Science. 1986 Dec 19;234(4783):1573–1577. doi: 10.1126/science.3787263. [DOI] [PubMed] [Google Scholar]
- Reddick R. L., Zhang S. H., Maeda N. Atherosclerosis in mice lacking apo E. Evaluation of lesional development and progression. Arterioscler Thromb. 1994 Jan;14(1):141–147. doi: 10.1161/01.atv.14.1.141. [DOI] [PubMed] [Google Scholar]
- Ross R. The pathogenesis of atherosclerosis: a perspective for the 1990s. Nature. 1993 Apr 29;362(6423):801–809. doi: 10.1038/362801a0. [DOI] [PubMed] [Google Scholar]
- Smithies O., Kim H. S. Targeted gene duplication and disruption for analyzing quantitative genetic traits in mice. Proc Natl Acad Sci U S A. 1994 Apr 26;91(9):3612–3615. doi: 10.1073/pnas.91.9.3612. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tanimoto K., Sugiyama F., Goto Y., Ishida J., Takimoto E., Yagami K., Fukamizu A., Murakami K. Angiotensinogen-deficient mice with hypotension. J Biol Chem. 1994 Dec 16;269(50):31334–31337. [PubMed] [Google Scholar]
- Zhang S. H., Reddick R. L., Burkey B., Maeda N. Diet-induced atherosclerosis in mice heterozygous and homozygous for apolipoprotein E gene disruption. J Clin Invest. 1994 Sep;94(3):937–945. doi: 10.1172/JCI117460. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Zhang S. H., Reddick R. L., Piedrahita J. A., Maeda N. Spontaneous hypercholesterolemia and arterial lesions in mice lacking apolipoprotein E. Science. 1992 Oct 16;258(5081):468–471. doi: 10.1126/science.1411543. [DOI] [PubMed] [Google Scholar]
- van Ree J. H., van den Broek W. J., Dahlmans V. E., Groot P. H., Vidgeon-Hart M., Frants R. R., Wieringa B., Havekes L. M., Hofker M. H. Diet-induced hypercholesterolemia and atherosclerosis in heterozygous apolipoprotein E-deficient mice. Atherosclerosis. 1994 Nov;111(1):25–37. doi: 10.1016/0021-9150(94)90188-0. [DOI] [PubMed] [Google Scholar]