l’Oréal Patents Cosmetic Use of Lacritin-Type Polypeptides

US Patent No. 9,168,215 B2; L’Oréal Paris has patented a method for characterizing a condition of skin. The method entails the following steps:

A) performing, in a first sample isolated from skin, a quantitative measurement of at least one polypeptide of amino acid sequence represented by SEQ ID NO: 4, or a nucleic acid sequence encoding said at least one polypeptide; and

B) comparing said measurement to a reference measurement, wherein the reference measurement is obtained from a quantitative measurement of the polypeptide, or of the nucleic acid sequence encoding the polypeptide, of a second sample taken from reference skin distinct from the skin of the first sample, the quantitative measurements being made by means of an isobaric labeling technique, said condition of the skin being chosen from skin dryness and chronological and/or photo-induced skin aging.