Tetrapeptide and compositions comprising tetrapeptides

A tetrapeptide, capable of inducing dermal extracellular matrix protein upregulation, selected from the group consisting of tetrapeptides having the amino acid sequence U-(SEQ ID No:

• 1)-Z, U-(SEQ ID No:
• 2)-Z, U-(SEQ ID No:
• 3)-Z, U-(SEQ ID No:
• 4)-Z, U-(SEQ ID No:
• 5)-Z, U-(SEQ ID No:
• 6)-Z, U-(SEQ ID No:
• 7)-Z, U-(SEQ ID No:
• 8)-Z, U-(SEQ ID No:
• 9)-Z, U-(SEQ ID No:
• 11)-Z, U-(SEQ ID No:
• 12)-Z, U-(SEQ ID No:
• 13)-Z, U-(SEQ ID No:
• 14)-Z, U-(SEQ ID No:
• 15)-Z, U-(SEQ ID No:
• 16)-Z, U-(SEQ ID No:
• 17)-Z, U-(SEQ ID No:
• 18)-Z, U-(SEQ ID No:
• 19)-Z, U-(SEQ ID No:
• 20)-Z, U-(SEQ ID No:
• 21)-Z, U-(SEQ ID No:
• 22)-Z, U-(SEQ ID No:
• 23)-Z, U-(SEQ ID No:
• 24)-Z, U-(SEQ ID No:
• 25)-Z, U-(SEQ ID No:
• 26)-Z, U-(SEQ ID No:
• 27)-Z, U-(SEQ ID No:
• 28)-Z, and U-(SEQ ID No:
• 29)-Z wherein at the N-terminal end, U is selected from the group consisting of CO—R1, —SO2—R1 or a biotinyl group, at the C-terminal end, Z is selected from the group consisting of OH, OR1, NHR1 or NR1R2 wherein R1 and R2 are independently selected from the group consisting of alkyl, aryl, aralkyl, alkylaryl, alkoxy, saccharide and aryloxy group, which may be linear, branched, cyclical, polycyclic, unsaturated, hydroxylates, carbonylated, phosphorylated and/or sulphurous, said groups comprising from 1 to 24 carbon atoms and being capable of including one or more heteroatoms O, S and/or N.