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Novel Antiangiogenic Peptide Agents and Their Therapeutic and Diagnostic Use

a technology of peptide agents and peptide sources, which is applied in the direction of peptide sources, angiogenin, growth hormones, etc., can solve the problems of pathological impairment, poor vascular development, rapid and excessive angiogenesis accompanies the growth of placenta and solid tumors,

Inactive Publication Date: 2008-04-17
RGT UNIV OF CALIFORNIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a peptide that inhibits the growth of new blood vessels and the formation of tumors. It is made from a specific part of human placental lactogen, growth hormone, and prolactin. The peptide can be produced using a nucleic acid and can be administered to patients to treat angiogenic diseases and inhibit tumor growth. The invention also includes a method for diagnosing abnormal placental vascularization during pregnancy by measuring the levels of certain proteins in a patient's tissue. Overall, the invention provides a novel approach for treating and preventing diseases associated with abnormal blood vessel growth.

Problems solved by technology

Additionally, rapid and excessive angiogenesis accompanies the growth of the placenta and solid tumors.
Pathological impairment of placental invasion and poor vascular development has been associated with both fetal and maternal complications.
As a result of poor placental blood supply, and decreased fetal oxygenation and nutrition, this condition results in small-for-dates infants.
Preeclampsia, a condition that affects approximately 250,000 American pregnancies each year, puts mothers and their fetuses at high risk.
Pathological conditions involving excessive trophoblastic invasion, such as placenta accreta and gestational trophoblastic tumors, can cause devastating maternal complications including hemorrhage and metastatic neoplasia.

Method used

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  • Novel Antiangiogenic Peptide Agents and Their Therapeutic and Diagnostic Use
  • Novel Antiangiogenic Peptide Agents and Their Therapeutic and Diagnostic Use
  • Novel Antiangiogenic Peptide Agents and Their Therapeutic and Diagnostic Use

Examples

Experimental program
Comparison scheme
Effect test

example 1

Antiangiogenic Activity of 16K N-Terminal Fragments of Human Growth Hormone, Human Placental Lactogen, Human Prolactin, and Human Growth Hormone Variant hGH-V

[0107] 16K N-terminal antiangiogenic agents were derived from full length human growth hormone, human growth hormone variant hGH-V, human placental lactogen and prolactin. These peptides were tested in vivo and in vitro for their binding and antiangiogenic activity in assays described in below. Results of these testings are illustrated in FIGS. 1-5.

[0108] A. In Vitro and In Vivo Angiogenic Inhibitory Activity

[0109] Biological antiangiogenic activity of the 16K N-terminal fragments was tested in bovine brain capillary endothelial cell assay, as well as in vivo chick chorioallantoic membrane assay. The in vitro and in vivo antiangiogenic inhibitory characteristics of the peptides of the invention were determined and are described in Sections 1 and 2, below.

[0110] 1. In Vitro Antiangiogenic Activity

[0111] In vitro, the peptid...

example 2

Endogenous 16K N-Terminal Fragments in the Placenta

[0151] The interaction of fetal and maternal cells at the placental-decidual interface in eutherian mammals has been the subject of intensive investigation during the last two decades. Variation among species is dramatic. The most complex interactions are observed in hemochorial placentation, e.g. in human and mouse, where fetal trophoblast cells are in direct contact with the maternal circulation.

[0152] The establishment of adequate placental vascularization is critical to the survival of the developing conceptus, and requires extensive proliferation and remodeling of the deciduil vascular tree. If vasculogenic mechanisms of placentation are similar to those reported for tumor invasion there are at least two forces driving the acquisition of the new blood supply. Maternal endothelial cells are recruited toward the placenta and concomitantly, placental cells migrate toward proliferating maternal vessels.

[0153] The factors that pr...

example 3

General Procedure for the Production of Peptides

[0180] This example illustrates the general methods used for the production of peptides of the invention.

[0181] Intact full length human prolactin (hPL), human growth hormone (hGH), human growth hormone variant (hGH-v), human placental lactogen (hPL) and 16K N-terminal fragment of human prolactin (16K hPRL), growth hormone (16K hGH), growth hormone variant (16 hGH-V) and placental lactogen (16K hPL) were produced as described below.

[0182] The coding sequences, antisense sequences, and amino acid sequences of the intact hormones and 16K N-terminal peptides are listed in sequences identified as SEQ ID NO:1-30 as follows.

hPRL (Met−1Cys199)(SEQ ID NO:1)ATGTTGCCCA TCTGTCCCGG CGGGGCTGCC CGATGCCAGG TGACCCTTCG AGACCTGTTT 60GACCGCGCCG TCGTCCTGTC CCACTACATC CATAACCTCT CCTCAGAAAT GTTCAGCGAA120TTCGATAAAC GGTATACCCA TGGCCGGGGG TTCATTACCA AGGCCATCAA CAGCTGCCAC180ACTTCTTCCC TTGCCACCCC CGAAGACAAG GAGCAAGCCC AACAGATGAA TCAAAAAGAC240TTTCTGAGCC TGAT...

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Abstract

The current invention concerns novel antiangiogenic peptides which correspond to about 10 to about 150 consecutive amino acids of N-terminal sequences of human growth hormone, human placental lactogen, human growth hormone variant hGH-V, and prolactin, and their use in inhibiting angiogenesis and in the diagnosis of diseases of human pregnancy involving abnormalities of placental vascularization.

Description

[0001] This application claims the benefit of the priority date of and is a continuation of U.S. application Ser. No. 09 / 076,675, filed May 12, 1998, which claims priority under 35 U.S.C. 119(e) to U.S. Provisional Application No. 60 / 046,394, filed May 13, 1997.BACKGROUND OF THE INVENTION [0002] A growing number of serious, debilitating and often fatal diseases are associated with angiogenesis. These diseases are cumulatively called angiogenic diseases. Under normal physiological conditions, angiogenesis in mammals is endogenously controlled throughout the lifetime and neovascularization rarely occurs except during embryonic development, the reproductive cycle, and wound healing. [0003] Examples of the pathological conditions leading to development of angiogenic diseases are, among others, arthritis, rheumatoid arthritis, atherosclerotic plaques, corneal graft neovascularization, wound healing, hypertrophic or keloid scars, proliferative retinopathy, diabetic retinopathy, macular de...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K38/00A61P43/00C07K16/00C07K14/575C07K14/61
CPCA61K38/00C07K14/61C07K14/57554C07K14/57518A61P43/00
Inventor WEINER, RICHARD I.MARTIAL, JOSEPH A.STRUMAN, INGRIDTAYLOR, ROBERTBENTZIEN, FRAUKE
Owner RGT UNIV OF CALIFORNIA
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