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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 282 (1990), S. 33-37 
    ISSN: 1432-069X
    Keywords: Apocrine gland ; Intranuclear androgen ; Androgen receptor ; Osmidrosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 5α-Dihydrotestosterone (DHT) and testosterone were measured by radioimmunoassay in the crude nuclear and cytoplasmic fractions of the axillary skin of both male and female patients with osmidrosis and the levels compared with those of nongenital skin. The intranuclear levels of DHT were 1.44±0.22 and 1.77±0.38 pg/Μg DNA in men and women, respectively. Those of testosterone were about 10% of DHT levels. In the skin of nontarget regions nuclear DHT was much scarcer or undetectable. Cytosolic androgen receptors in isolated apocrine glands were also measured using 3H-R1881 as a ligand. Typical androgen receptors were present in all of eight patients (KD=1.32 ±0.24×10−9M, Bmax=10.3±0.51 fmol/mg protein). Neither the intranuclear androgen concentrations nor the cytosolic androgen receptor levels were significantly different between the two sexes. These data indicate clearly that the apocrine gland of patients with osmidrosis is a typical androgen target organ, irrespective of sex, and suggest that nuclear DHT in the axillary skin of women is derived from not only testosterone but also other precursors, especially in consideration of the very low serum concentrations of testosterone in females.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-069X
    Keywords: Sebaceous gland ; Androgen receptor ; 5α-Reductase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The side gland of Suncus murinus is composed of well-developed sebaceous glands in both males and females. We measured the 5α-reductase activity, androgen receptor content, and the intranuclear concentrations of testosterone and dihydrotestosterone in this side gland taking it as a new experimental model of human sebaceous glands. Lineweaver-Burk plot analysis suggested the presence of two classes of 5α-reductase with different Km for testosterone in the homogenate. The enzyme activity was slightly higher in males than in females in the presence of a high concentration of testosterone. The levels of androgen receptors were approximately 40 and 30 fmol/mg protein in the cytosol and nuclei, respectively. The values did not differ significantly between males and females. The intranuclear concentration of dihydrotestosterone in the side gland was higher than that of testosterone in each sex. The intranuclear level of each of these two androgens in the female side gland was comparable to that in the male side gland despite the fact that the serum level of testosterone was much lower in the female. These data clearly indicate that the side gland is a typical target tissue for androgens in the female as well as in the male. Androgens other than testosterone may serve as precursors of dihydrotestosterone in the female side gland.
    Type of Medium: Electronic Resource
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