Cold insoluble globulin, its purification and use
First Claim
1. A preparation comprising affinity purified, biologically active cold insoluble globulin having a specific opsonic activity of at least 1000 units per milligram of cold insoluble globulin protein.
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Accused Products
Abstract
A highly purified, biologically active cold insoluble globulin (CIG) preparation is provided having specific opsonic activity of at least 1000 units per mg of CIG. Methods of purifying CIG using affinity antibody columns are described in which the biological activity of the purified CIG is greater than 95% of the activity of the starting material.
The purified CIG can be radiolabelled and radiopharmaceutical preparations containing such CIG are useful as scanning agents for in vivo localizing of areas where CIG-binding determinants are expressed. Such areas include thrombi and damaged tissue such as burns, heart, liver, spleen, muscle, skin, kidney and the like. These areas of localized radiolabelled CIG can be visualized with a gamma camera.
29 Citations
36 Claims
- 1. A preparation comprising affinity purified, biologically active cold insoluble globulin having a specific opsonic activity of at least 1000 units per milligram of cold insoluble globulin protein.
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5. A method for purifying cold insoluble globulin comprising:
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preparing antisera to the cold insoluble globulin to obtain anti-CIG; attaching said anti-CIG to a substrate to form anti-CIG-substrate; contacting a fluid comprising cold insoluble globulin to be purified with the anti-CIG-substrate to remove the cold insoluble globulin from the fluid; separating the anti-CIG-substrate with the cold insoluble globulin attached thereto from the fluid and eluting purified cold insoluble globulin from the anti-CIG-substrate. - View Dependent Claims (6, 7, 8)
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- 9. A radiopharmaceutical preparation comprising a pharmaceutically acceptable carrier containing purified biologically active cold insoluble globulin having a specific opsonic activity of at least 500 units per milligram of cold insoluble globulin protein, said cold insoluble globulin being radiolabelled.
- 19. A radiopharmaceutical preparation comprising a radiolabelled biologically active cold insoluble globulin in a pharmaceutically acceptable carrier, said radiolabelled cold insoluble globulin having been made by radiolabelling cold insoluble globulin having a specific opsonic activity of at least 1000 units per milligram of cold insoluble globulin.
- 23. A method for in vivo visualizing a site of protein or cellular components expressing CIG-binding determinants in a higher animal, said method comprising injecting said animal with a radiopharmaceutical preparation containing radiolabelled affinity purified cold insoluble globulin having a specific opsonic activity of at least 1000 units per milligram of protein, localizing the cold insoluble globulin at said site, and visualizing said site with radioscintigraphic imaging apparatus.
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25. A method for in vivo visualizing a site of thrombi or tissue damage in a higher animal, said method comprising injecting said animal with a radiopharmaceutical preparation containing radiolabelled cold insoluble globulin, localizing the cold insoluble globulin at said site of thrombi or tissue damage, and visualizing said site of thrombi or tissue damage with radioscintigraphic imaging apparatus.
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26. A method for in vivo visualizing a burn site in a higher animal, said method comprising intravenously injecting said animal with a radiopharmaceutical preparation containing radiolabelled cold insoluble globulin, localizing the cold insoluble globulin at said burn site, and visualizing said site with radioscintigraphic imaging apparatus.
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27. A method for in vivo visualizing a site of thrombi in a higher animal, said method comprising intravenously injecting said animal with a radiopharmaceutical preparation containing radiolabelled cold insoluble globulin, localizing the cold insoluble globulin at the site of said thrombi, and visualizing said site with radioscintigraphic imaging apparatus.
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28. A method for in vivo visualizing a site of an ulcer in a higher animal, said method comprising intravenously injecting said animal with a radiopharmaceutical preparation containing radiolabelled cold insoluble globulin, localizing the cold insoluble globulin at said site of said ulcer, and visualizing said site with radioscintigraphic imaging apparatus.
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29. A method for in vivo visualizing an infarct in a higher animal, said method comprising intravenously injecting said animal with a radiopharmaceutical preparation containing radiolabelled cold insoluble globulin, localizing the cold insoluble globulin at said infarct, and visualizing said infarct with radioscintigraphic imaging apparatus.
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30. A method for in vivo visualizing a site of lymph node metastases in a higher animal, said method comprising lymphatically injecting said animal with a radiopharmaceutical preparation containing radiolabelled cold insoluble globulin, localizing the cold insoluble globulin at said site of said lymph node metastases, and visualizing said site with radioscintigraphic imaging apparatus.
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31. A method for in vivo visualizing of tumors in a higher animal, said method comprising when intravenously injecting said animal with a radiopharmaceutical preparation containing radiolabelled cold insoluble globulin, localizing the cold insoluble globulin at the site of said tumor, and visualizing said tumor with radioscintigraphic imaging apparatus.
- 32. A preparation comprising biologically active cold insoluble globulin having a specific opsonic activity of at least 1000 units per milligram of protein.
Specification