摘要:
The present invention is directed to compounds which inhibit farnesyl-protein transferase (FTase) and the farnesylation of the oncogene protein Ras. The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting farnesyl-protein transferase and the farnesylation of the oncogene protein Ras.
摘要:
The present invention comprises analogs of the CAAX motif of the protein Ras that is modified by farnesylation in vivo. These CAAX analogs inhibit the farnesylation of Ras. Furthermore, these CAAX analogues differ from those previously described as inhibitors of Ras farnesyl transferase in that they do not have a thiol moiety. The lack of the thiol offers unique advantages in terms of improved pharmacokinetic behavior in animals, prevention of thiol-dependent chemical reactions, such as rapid autoxidation and disulfide formation with endogenous thiols, and reduced systemic toxicity. Further contained in this invention are chemotherapeutic compositions containing these farnesyl transferase inhibitors and methods for their production.
摘要:
Oligopeptides which comprise amino acid sequences that are recognized and proteolytically cleaved by free prostate specific antigen (PSA) are described. Also described are assays which comprise such oligopeptides useful for determining free PSA protease activity in vitro and in vivo. Therapeutic agents which comprise conjugates of such oligopeptides and known cytotoxic agents are also described.
摘要:
Pentapeptides of the formula: ##STR1## wherein R.sup.1 is hydrogen, methyl, ethyl, propyl, 2-methyl-2-pentenyl, 2-methyl-1-pentenyl, cyclopropylmethyl, or cyclobutylmethyl; R.sup.2, R.sup.3, and R.sup.4 are, independently, hydrogen or methyl; and X is --OH, --NH.sub.2, --NHC.sub.n H.sub.2n+1 where n is 1, 2, 3, or 4, --OR.sup.3, or CH.sub.2 OR.sup.3, where R.sup.3 is hydrogen or lower alkyl of from 1 to 4 carbon atoms; or a pharmaceutically acceptable salt thereof; have analgesic activity upon administration to warm-blooded animals.
摘要翻译:式中:R 1为氢,甲基,乙基,丙基,2-甲基-2-戊烯基,2-甲基-1-戊烯基,环丙基甲基或环丁基甲基的五肽。 R2,R3和R4独立地是氢或甲基; 并且X是-OH,-NH 2,-NHC n H 2n + 1,其中n是1,2,3或4,-OR 3或CH 2 OR 3,其中R 3是氢或具有1至4个碳原子的低级烷基; 或其药学上可接受的盐; 对温血动物施用时具有止痛活性。
摘要:
The invention provides compositions and methods for the treatment of diseases associated with amyloid deposits of Aβ in the brain of a patient, such as Alzheimer's disease. Such methods entail administering an immunogenic fragment of Aβ, lacking a T-cell epitope, capable of inducing a beneficial immune response in the form of antibodies to Aβ. In another aspect, the immunogenic fragment of Aβ is capable of elevating plasma Aβ levels. The immunogenic fragments comprise linear or multivalent peptides of Aβ. Pharmaceutical compositions comprise the immunogenic fragment chemically linked to a carrier molecule which may be administered with an adjuvant.
摘要:
Novel pharmaceutical compositions useful for the treatment of benign prostatic hyperplasia which comprises novel oligopeptides, which are selectively cleaved by enzymatically active PSA, in conjugation with a cytotoxic agent are described. Methods of treating benign prostate hypertrophy are also disclosed.
摘要:
Chemical conjugates which comprise oligopeptides, having amino acid sequences that are selectively proteolytically cleaved by free prostate specific antigen (PSA) and known cytotoxic agents are disclosed. The conjugates of the invention are characterized by attachment of the cleavable oligopeptide to the oxygen atom at the 4-position on a vinca drug that has be desacetylated. Such conjugates are useful in the treatment of prostatic cancer and benign prostatic hypertrophy (BPH).
摘要:
The pentapeptide Val Val Asn Asp Leu has been found to be the shortest peptide sequence that inhibits the activity of the ribonucleotide reductase enzyme of herpes simplex virus in vitro thereby inhibiting viral replication. Longer peptides containing the foregoing pentapeptide sequence are more potent inhibitors.
摘要翻译:已经发现五肽Val Val Asn Asp Leu是体外抑制单纯疱疹病毒核糖核苷酸还原酶活性的最短肽序列,从而抑制病毒复制。 含有前述五肽序列的较长的肽是更有效的抑制剂。
摘要:
Polypeptides of the formula ##STR1## wherein: R is hydrogen, lower alkanoyl, Ala-Gly-, Gly-Gly-Gly-, Ala-D-Ala- or p-Glu;AndX.sub.8 is L-Trp or D-Trp;Or the linear reduced form thereof; or a nontoxic acid addition salt thereof; are described. (D-Trp.sup.5)-Somatostatin and its analogues inhibit the release of growth hormone and insulin without materially affecting the secretion of glucagon, and are useful in the treatment of hyperinsulinemia and acromegaly.