title: Circadian variations in the number of actively secreting sebaceous follicles and androgen circadian rhythms.
abstract: Sebum excretion has been shown to demonstrate a circadian rhythm using a gravimetric method (cigarette paper). With the newly introduced method of Sebutape, we confirmed this periodicity and showed that the elevation in sebum excretion is correlated with an increase in the number of secreting follicles. We found, furthermore, that the number of secreting follicles on the forehead showed a distinct and statistically significant circadian rhythmicity, in contrast to those of the chest, which remained almost constant. The quantification in plasma levels of cortisol, melatonin, delta-4-androstenedione, dehydroepiandrosterone sulphate, and free testosterone showed no correlation with sebum excretion at either site. These observations suggest that local factors are involved in control of sebum secretion.
authors.affiliation: Centre International de Recherches Dermatologiques Galderma (C.I.R.D. Galderma, Sophia Antipolis, Valbonne, France.
authors.forename: M
authors.initials: M
authors.lastname: Verschoore
authors.forename: M
authors.initials: M
authors.lastname: Poncet
authors.forename: B
authors.initials: B
authors.lastname: Krebs
authors.forename: J P
authors.initials: JP
authors.lastname: Ortonne
mesh_terms: D000328:Adult; D000728:Androgens / Q000097:blood / Q000378:metabolism*; D000735:Androstenedione / Q000097:blood / Q000378:metabolism; D002940:Circadian Rhythm / Q000502:physiology*; D003687:Dehydroepiandrosterone / Q000031:analogs & derivatives / Q000097:blood / Q000378:metabolism; D019314:Dehydroepiandrosterone Sulfate; D006801:Humans; D006854:Hydrocortisone / Q000097:blood / Q000378:metabolism; D008297:Male; D008550:Melatonin / Q000097:blood / Q000378:metabolism; D011863:Radioimmunoassay; D012627:Sebaceous Glands / Q000378:metabolism*; D012629:Sebum / Q000378:metabolism*; D012879:Skin Physiological Phenomena; D012881:Skin Temperature; D013739:Testosterone / Q000097:blood / Q000378:metabolism
chemical_list: D000728:Androgens; D013739:Testosterone; D000735:Androstenedione; D003687:Dehydroepiandrosterone; D019314:Dehydroepiandrosterone Sulfate; D008550:Melatonin; D006854:Hydrocortisone