Abstract: A peptide or salt thereof includes an amino acid sequence set forth in SEQ ID NO:1 containing an amino acid sequence in which at least one of (a) the first aspartate residue and the second aspartate residue from the N-terminus, or (b) the 17th glycine residue and the 18th aspartate residue from the N-terminus is deleted. A peptide or salt thereof includes an amino acid sequence set forth in SEQ ID NO:5 containing an amino acid sequence in which the sixth aspartate residue from the N-terminus is substituted with another amino acid residue. The peptides or salts thereof include three specific serine residues of which at least two serine residues are phosphorylated, and have an action of inhibiting biotissue calcification.

Abstract: A therapeutic drugs for bone diseases containing as the active ingredient staniocalcin 1 which is found to have an effect of increasing bone mass. This drug for bone diseases is effective for bone diseases accompanied by anomalous osteogenesis or reduction in bone mass, such as osteoporosis, traumatic bone injuries, osteomalacia, rheumatic bone diseases, cancer-associated bone diseases, bone diseases associated with phosphorus metabolic error or calcium metabolic error, rachitis, and arthrosis deformans.

Abstract: A method for inhibiting dopamine re-uptake and treating Parkinson's disease is disclosed comprising administering a compound represented by formula (1) or a physiologically acceptable salt thereof as the active ingredient: ##STR1## wherein R.sup.1 and R.sup.2 represent each hydrogen or halogen, R.sup.3 represents hydrogen, alkyl or acyl, R.sup.4 represents hydrogen, alkyl, acyl, alkylsulfonyl or optionally esterified carboxyl, Ar represents optionally substituted phenyl or nitrogenous monocyclic heteroaromatic group, m represents a number of 1 to 5, and n represents a number of 0 to 5.

Abstract: A diphenylpiperazine derivative represented by general formula (1), salt thereof, and drug for the circulatory organs containing the same as the active ingredient: ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different from each other and each represents hydrogen, halogen, alkyl, alkoxy, nitro, amino, hydroxy, optionally esterified carboxyl or trifluoromethyl; R.sup.3 represents hydrogen, alkyl, aralkyl, acyl, nitro or optionally esterified carboxymethyl; Ar represents phenyl or naphthyl which may have one to three substituents such as halogen, alkyl, alkoxy, aryloxy, aralkyloxy, nitro, amino, cyano, acyl, hydroxy, optionally esterified carboxyl, substituted sulfonyl, aryl or trifluoromethyl; Z represents sulfur or -NR.sup.4 - wherein R.sup.4 represents hydrogen, alkyl, aralkyl, acyl, aryl, substituted sulfonyl or optionally esterified carboxyl; m represents a number of 1 to 5; and n represents a number of 0 to 5.