lipid

Effects of different kinds of pollutants on the lipidic metabolism of human sebocytes and protective effects of a new macroalgae culture extract

Sebocytes lipid production are stimulated by pollutants. Ame acts by protecting epidermal cells, human sebocytes and skin from urban dust.

Acne vulgaris: physiopathology and cell mechanisms

Acne Vulgaris is a chronic inflammatory pathology located in the region of the pilosebaceous follicle. It occurs following a high production of sebum linked to hormonal (androgynous) or environmental (pollution) malfunctioning and to the colonization of the pilosebaceous follicle by certain bacteria (P. acnes). Bioalternatives has developed a panel of innovative assays to discover and evaluate compounds for the treatment of acne.

Physiology and functions of the sebaceous gland

The sebaceous gland is an organ located in the dermis. Its role is to synthesise and secrete sebum which is a component of the hydrolipidic film. The purpose of sebum is to protect the skin from external aggression and dehydration. Sebum also maintains the suppleness of the skin and hair.

Androgens induce sebaceous differentiation in sebocyte cells expressing a stable functional androgen receptor

In order to study the impact of active androgens in sebocytes, we constructed a stable human sebocyte cell line derived from SEBO662 [17] constitutively expressing a fully functional AR. In these SEBO662 AR+ cells, dihydrotestosterone (DHT) induced AR nuclear translocation and the strong modulation of a set of transcripts (RASD1, GREB1...) known to be androgen-sensitive in other androgenic cells and tissues.

Immortalized sebocytes SEBO662 can spontaneously differentiate into a sebaceous-like phenotype when cultured as a 3D epithelium

SEBO662 multilayers spontaneously differentiate into a sebaceous-like structure as shown by the strong polarized expression of the late sebaceous marker EMA, the overexpression of some lipogenic markers and lipid production on the upper side of the epithelium.