摘要:
A peptide component (A) represented by the following formula (1a) with a peptide component (B) represented by the following formula (2a) and a compound (C) represented by the following formula (3a), as an optional component are subjected to a condensation reaction in the presence of a dehydrating and condensing agent and a condensing auxiliary; provided that in the case where “X” represents HOOC—(CH2)m—CO— in the formula (1a) and/or (2a), the reaction is conducted with the compound (C). The ratio of the peptide component (A) relative to the peptide component (B) is 100/0 to 30/70 (mol %), and the ratio of the compound (C) relative to the total molar amount of the peptide component (A) and/or the peptide component (B). X-(Pro-Y-Gly)n-OH (1a), X—(Z)r—OH (2a), H2N—R—NH2 (3a) Wherein “X” represents H or the group HOOC—(CH2)m—CO— (“m”=1 to 18), “Y” represents Pro or Hyp, “n”=1 to 20, “Z” represents a peptide chain comprising 1 to 10 amino acid residue(s), “r”=1 to 20, and “R” represents a linear or branched alkylene group. The present invention provides a collagenous polypeptide which is free from a risk of an infection by a pathogenic organism (or a causative factor) or an undesirable side effect, and which has a high safety.
摘要:
The present invention provides a hemostatic material which is excellent in hemostatic property, biodegradability and bioabsorbability, uniformity and stability of the quality, as well as reduces a risk of contamination with a pathogenic organism derived from an animal. The hemostatic material comprises a thrombin and a synthetic polypeptide capable of forming a triple helical structure. The polypeptide may show a peak of the molecular weight in the range from 5×104 to 100×104 in the molecular weight distribution. The polypeptide may contain at least a peptide unit represented by the formula: -Pro-X-Gly- (in the formula, X represents Pro or Hyp). The thrombin may be a recombinant. In the hemostatic material, the proportion of the thrombin may be about 0.1 to 500 units (U) relative to 1 mg of the polypeptide. The hemostatic material may further comprise a binder component having biodegradability and bioabsorbability. The hemostatic material may be formed on a substrate.
摘要:
A peptide has any one of the sequences SEQ ID NO.1 to SEQ ID NO.8, or has a sequence derived from any one of the sequences SEQ ID NO.1 to SEQ ID NO.8 by substitution, deletion or addition of one or several amino acids therein and having an osteogenetic activity.
摘要翻译:肽具有SEQ ID NO.1至SEQ ID NO.8中的任一个,或具有通过取代,缺失或添加一个序列SEQ ID NO.1至SEQ ID NO.8中任一个序列的序列 或其中的几个氨基酸并具有成骨活性。
摘要:
A water swelling polymer gel produced by covalently crosslinking a polysaccharide having a carboxyl group within the molecule with a diaminoalkane derivative as the crosslinking reagent. The medical polymer gel is useful as the structural component of wound dressings, adhesives for biological tissues, adhesion preventing agents, bone reinforcing agents, and drug releasing base materials. Wound dressings comprising the structural material of the water swelling polymer gel of the present invention, can be applied to a patient with wound, burn, and decubitus to promote the healing of the wounds of the patient.
摘要:
Peptides having high binding activity for human interleukin-1 and represented by the following formulaH-X.sup.1 -Cys-A-B-A-B-A-Ser-X.sup.2 -Ywherein each A represents an amino acid residue selected from the group consisting of Val, Leu, Ile and Nle, independent of any other selection for A; B represents an amino acid residue selected from the group consisting of Arg, Lys, Gln, His and Ser, independent of any other selection for B; X.sup.1 and X.sup.2 each is a single bond or a peptide segment comprising 1-10 amino acid residues selected from Gly, Ala, Val, Arg, Asn, Ser, Phe, Pro, Leu, Glu, Asp, Lys, Thr, His, Tyr, Nle and Ile and Y represents a hydroxyl group or an amino group; and their salts.
摘要:
Disclosed is a compound which exhibits a higher effect of preventing wrinkle formation, a higher effect of improving wrinkles, a higher effect of making the skin beautiful, and a higher effect of improving skin quality than conventional retinol and retinol derivatives in a sustained manner. Further disclosed are a method for producing the same, and an external composition for the skin and a sheet-shaped cosmetic each containing the same as an active ingredient. More specifically disclosed are retinol-modified collagen in which a dicarboxylic acid is attached to at least one hydroxyl group of collagen and retinol is attached to a carboxyl group of at least one attached dicarboxylic acid, a method for producing the same, and an external composition for the skin and a sheet-shaped cosmetic each containing the same as an active ingredient.
摘要:
A process for producing a polypeptide, by reacting a peptide component (A) represented by formula (1) below with a peptide component (B) represented by formula (2) below and optionally a compound (C) represented by formula (3) below, to obtain said polypeptide: (1) X-(Pro-Y-Gly)n-OH, wherein: X represents H or the group HOOC—(CH2)m—CO— and m denotes an integer of 1 to 18, Y represents Pro or Hyp, and n denotes an integer of 1 to 20; (2) X-(Z)r—OH, wherein X represents H or the group HOOC—(CH2)m—CO— and m denotes an integer of 1 to 18, Z represents a peptide chain comprising 1 to 10 amino acid residue(s), and r denotes an integer of 1 to 20; and (3) H2N—R—NH2, wherein R represents a linear or branched alkylene group; and further wherein the ratio of the peptide component (A) relative to the peptide component (B) is 100/0 to 30/70 (mol %); provided that in the case where X represents the group HOOC—(CH2)m—CO— and m has the same meaning as defined above in formula (1) and/or (2), the amount of compound (C) is substantially 1 mol relative to 1 mol of the total molar amount of peptide component (A) and/or peptide component (B); and in the case where X represents H in the formula (1) and/or (2), the reaction is conducted without compound (C).
摘要:
The present invention aims at providing a biomaterial composite not having risks of pathogen infection and unfavorable side effects such as rejection response. According to the invention, there is provided a biomaterial composite, which comprises a polypeptide and a calcium phosphate compound, said peptide comprising the units of Formulas (I) to (III): [—(OC—(CH2)m—CO)p-(Pro-Y-Gly)n-]a (I) [—(OC—(CH2)m—CO)p-(z)r-]b (II) [—HN—R—NH—]c (III) wherein m, p, q, Y, n, Z, r, R, a, b and c are as defined in the specification. The composite of the invention is particularly suitable for an artificial bone due to its high biocompatibility, high endurance and mechanical strength. Further, the invention can provide a process of the composite according to the invention can for preparation of the composite having excellent mechanical characteristics by a simple procedure.
摘要:
The present invention provides a novel biodegradable and biosorbable polypeptide which is free from a risk of an infection by a pathogenic organism or a transmission of a causative factor, or a risk of an undesirable side effect, and a process for producing the same, as well as a collagenase inhibitor comprising the polypeptide and having a high collagenase inhibitory action. The polypeptide contains a peptide unit having an amino acid sequence represented by the following formula (1), and a peptide unit having an amino acid sequence represented by the following formula (2): -Pro-X-Gly- (1) -Pro-Y-Gly-Z-Ala-Gly- (2) wherein X represents Pro or Hyp; Y represents Gln, Asn, Leu, Ile, Val or Ala; and Z represents Ile or Leu. The molar ratio of the peptide unit (1) relative to the peptide unit (2) is about 99/1 to 1/99.
摘要:
A polyvinyl alcohol is provided containing structural units of the following formula (I) at a molar fraction of 0.05-0.50 and the structural units of the following formula (II) at a molar fraction of 0.0001 to 0.50; ##STR1## wherein R.sup.1, R.sup.2, R.sub.3 and X are as desribed herein, and its use in preparation of gels, particularly hydrogels, effective for use in wound dressing materials.