THE EFFECTS OF CYPROTERONE ACETATE AND OESTRADIOL UPON TESTOSTERONE STIMULATED SEBACEOUS ACTIVITY IN THE RAT

1973 ◽  
Vol 72 (2) ◽  
pp. 361-365 ◽  
Author(s):  
F. J. Ebling

ABSTRACT Castrated rats were implanted with testosterone and in addition treated with either cyproterone acetate or oestradiol or both. Testosterone by itself very significantly increased both sebum production and the incidence of sebaceous mitoses. Each of the other compounds significantly reduced sebum production in rats treated with testosterone. Cyproterone acetate reduced the incidence of sebaceous mitoses and the weight of the preputial glands, whereas oestradiol had neither of these effects. When both compounds were given simultaneously, their combined effect in reducing sebaceous secretion was equal to the product of their individual effects. The results reinforce the view that oestrogenic and anti-oestrogenic steroids have different points of action in the sebaceous glands, and suggest that the most effective way of reducing sebaceous activity might be to use both types of compound in combination.

1975 ◽  
Vol 66 (3) ◽  
pp. 407-412 ◽  
Author(s):  
F. J. EBLING ◽  
ERIKA EBLING ◽  
VALERIE RANDALL ◽  
J. SKINNER

SUMMARY α-Melanocyte-stimulating hormone was shown to act synergistically with testosterone to stimulate the sebaceous, prostate and preputial glands and the seminal vesicles in hypophysectomized-castrated rats. The sebaceous glands differed from the other three organs in that α-MSH not only acted synergistically, but also had a significant effect which was independent of the presence of exogenous testosterone. The response of the brown adipose tissue to testosterone, considerably reduced by hypophysectomy, was not restored by α-MSH. The Harderian and lachrymal glands were also pituitary-dependent and their weights in hypophysectomized-castrated rats were not restored by α-MSH.


2021 ◽  
pp. 55-70
Author(s):  
K. A. Novikov ◽  
Tamrazova O. B. Tamrazova O. B. ◽  
Yu. I. Matushevskaya

Rosacea is a common chronic inflammatory dermatosis of vascular origin, characterized by a lesion of the face skin in the form of erythema and papulopustular elements. Taking into account the new research devoted to the treatment of rosacea, it is of scientific and practical interest to develop new methods for the treatment of this dermatosis using complex physiotherapy approaches and their synergy, for example, IPL radiation (without the use of photo filters) and submilisecond neodymium 1,064 nm laser radiation. Material and methods: The study included 130 patients with the combined subtype of rosacea (CSR) with varying degrees of severity of ETR and PPR. In order to study the effectiveness of complex photo- and laser therapy of CSR, all patients were divided into 4 groups by simple randomization (envelope method). The treatment of the patients in each separate group included: group I — laser therapy and 1% metronidazole cream; group II — phototherapy and 1% metronidazole cream; group III — complex photo-laser therapy and 1% metronidazole cream; group IV — comparison group, patients received only 1% metronidazole cream. This work takes into account the synergism of both physiotherapeutic effects provided by non-truncated (without the use of photo filters) IPL radiation and submilisecond neodymium 1,064 nm laser radiation, as well as the increased destruction of pathologically altered vessels observed during the sequential use of both procedures, and the developed original method of treating patients with CSR. Conclusion: Based on the obtained results, it was concluded that the maximum improvement in the morphofunctional parameters of the skin was in the third group of patients with CSR. The increase in the hydration index of the skin exceeded the indicators of the other groups of patients with CSR. Also, the intensity of sebum production decreased most significantly. There was a maximum narrowing of the excretory ducts of the sebaceous glands, while in the other groups, the narrowing of the excretory ducts of the sebaceous glands occurred to a lesser and equal extent. Such changes reflect the pronounced effect of complex phototherapy on the tone of the sphincter of the excretory duct, the intensity of sebum production, as well as on the synthesis of collagen and elastin, which is reflected in the maximum approximation to the indicators of the group of healthy volunteers of such characteristics as «hydration» and «smoothness».


2021 ◽  
pp. 53-67
Author(s):  
K. A. Novikov ◽  
O. B. Tamrazova ◽  
Yu. I. Matushevskaya

Rosacea is a common chronic inflammatory dermatosis of vascular origin, characterized by a lesion of the face skin in the form of erythema and papulopustular elements. Taking into account the new research devoted to the treatment of rosacea, it is of scientific and practical interest to develop new methods for the treatment of this dermatosis using complex physiotherapy approaches and their synergy, for example, IPL radiation (without the use of photo filters) and submilisecond neodymium 1,064nm laser radiation. Material and methods. The study included 130patients with the combined subtype of rosacea (CSR) with varying degrees of severity of ETR and PPR. In order to study the effectiveness of complex photo- and laser therapy of CSR, all patients were divided into 4groups by simple randomization (envelope method). The treatment of the patients in each separate group included: group I — laser therapy and 1% metronidazole cream; group II — phototherapy and 1% metronidazole cream; group III — complex photo-laser therapy and 1% metronidazole cream; group IV — comparison group, patients received only 1% metronidazole cream. This work takes into account the synergism of both physiotherapeutic effects provided by non-truncated (without the use of photo filters) IPL radiation and submilisecond neodymium 1,064 nm laser radiation, as well as the increased destruction of pathologically altered vessels observed during the sequential use of both procedures, and the developed original method of treating patients with CSR. Conclusion. Based on the obtained results, it was concluded that the maximum improvement in the morphofunctional parameters of the skin was in the third group of patients with CSR. The increase in the hydration index of the skin exceeded the indicators of the other groups of patients with CSR. Also, the intensity of sebum production decreased most significantly. There was a maximum narrowing of the excretory ducts of the sebaceous glands, while in the other groups, the narrowing of the excretory ducts of the sebaceous glands occurred to a lesser and equal extent. Such changes reflect the pronounced effect of complex phototherapy on the tone of the sphincter of the excretory duct, the intensity of sebum production, as well as on the synthesis of collagen and elastin, which is reflected in the maximum approximation to the indicators of the group of healthy volunteers of such characteristics as «hydration» and «smoothness».


1970 ◽  
Vol 48 (1) ◽  
pp. 73-81 ◽  
Author(s):  
F. J. EBLING ◽  
ERIKA EBLING ◽  
J. SKINNER ◽  
AUDREY WHITE

SUMMARY Administration of 1 i.u./24h of adrenocorticotrophic hormone (Cortrophin ZN, ACTH) to hypophysectomized—castrated rats significantly increased sebum production to the level of that in castrated rats with intact pituitaries. The incidence of mitoses in the sebaceous glands was also significantly increased. Neither the preputial glands nor the seminal vesicles showed any response. No significant increase in sebum production in hypophysectomized—castrated rats could be detected 24 days after giving implants releasing 0·2 or 0·6 mg testosterone/24 h, although sebaceous mitoses were significantly increased in both instances. Concomitant administration of both ACTH and testosterone raised sebum production to the same extent as ACTH alone, and raised the incidence of sebaceous mitoses to a level equal to that produced by ACTH plus testosterone. It is concluded that the sebaceous glands respond—either directly or indirectly as the result of stimulation of the adrenal cortex—to ACTH and that this response is less dependent on the presence of the pituitary than is the action of testosterone. ACTH does not itself facilitate the response of the sebaceous glands to testosterone.


1969 ◽  
Vol 45 (2) ◽  
pp. 245-256 ◽  
Author(s):  
F. J. EBLING ◽  
ERIKA EBLING ◽  
J. SKINNER

SUMMARY Testosterone implants releasing about 0·2 mg./day had no effect on sebum production in hypophysectomized-castrated rats, even though treatment by a similar dose of testosterone has been shown to effect a marked increase in sebaceous activity in rats with intact pituitaries. A preparation of porcine growth hormone, and a preparation of prolactin (luteotrophin) which had no growth hormone activity, were each capable of fully restoring the response of the sebaceous gland in hypophysectomized male rats to testosterone, though the pituitary hormones had no effect by themselves. The stimulation of sebaceous activity was measured both by the increase in sebum production and by the increased incidence of cell division in the sebaceous glands. The responses of the preputial glands and seminal vesicles to testosterone were independent of the presence of the pituitary, and were not significantly enhanced by the hypophysial hormones.


1969 ◽  
Vol 45 (2) ◽  
pp. 257-263 ◽  
Author(s):  
F. J. EBLING ◽  
ERIKA EBLING ◽  
J. SKINNER

SUMMARY Progesterone, given as an implant releasing 0·1–0·2 mg./day for 24 days, failed to increase sebum production or preputial gland weight in castrated or hypophysectomized-castrated male rats. A dose of 10 mg./day in arachis oil also failed to increase sebum production or mitoses in the sebaceous glands, though it increased by 70% preputial gland weight in the presence of the pituitary. Hypophysectomy greatly reduced preputial gland wt, and the response of hypophysectomized rats to 10mg. progesterone/day was much less than when the pituitary was present. A porcine growth hormone preparation, known to facilitate the response of the sebaceous gland to testosterone in the hypophysectomized rat, failed to facilitate the response of the preputial gland to progesterone. It is concluded that 'sebum-permissive' activity (the facilitation of the response of the sebaceous gland to testosterone) may be distinct from ' sebotropic' activity (facilitation of the response of the preputial gland to progesterone), and it is argued that each of these activities may prove to be separable from somatotrophic activity.


1967 ◽  
Vol 38 (2) ◽  
pp. 181-185 ◽  
Author(s):  
F. J. EBLING

SUMMARY An anti-androgenic steroid, 17α-methyl-B-nortestosterone was shown to reduce sebum production in spayed female rats treated simultaneously with testosterone. The sebum production was assessed by measuring the increase in the amount of ether-extractable hair fat over a period of 8 days immediately after washing the rats. Testosterone increased the secretion of sebum mainly by stimulating mitosis in the sebaceous glands and it was shown that the anti-androgenic steroid acted at this site, i.e. by suppressing mitosis. These effects were in contrast to the action of oestradiol which also depressed sebaceous activity, but appeared to do so by interfering with synthesis in the sebaceous cells.


2013 ◽  
Vol 58 (No. 5) ◽  
pp. 260-263
Author(s):  
B. Mobini

The present investigation aimed to evaluate the histomorphometric features of the skin of the Iranian native sheep (Bakhtiari breed). A total of 24 apparently healthy Iranian Bakhtiari sheep, aged 1–2 years were analysed and categorised on the basis of sex (12 females and 12 males). Samples were taken as small pieces from different regions of the skin, fixed and stained with H&E. The quantitative evaluations of different regions of skin were carried out using lattice line graticule (5 × 5) and light microscopy. The Student t-test and one-way ANOVA were used to analyse the data and detect significant differences. Results showed that the volume densities of different histological structures varied between sexes and among the different regions. No significant difference was observed in volume densities of sebaceous glands, arrector pili muscles and blood vessels, but the other parameters studied differed significantly among the regions. Except for the arrector pili muscle and connective tissue, the volume densities of other tissue structures were significantly affected by sex.  


2016 ◽  
Vol 14 (06) ◽  
pp. 1640036 ◽  
Author(s):  
Tabish Qureshi ◽  
Pravabati Chingangbam ◽  
Sheeba Shafaq

The ghost interference observed for entangled photons is theoretically analyzed using wave-packet dynamics. It is shown that ghost interference is a combined effect of virtual double-slit creation due to entanglement, and quantum erasure of which-path information for the interfering photon. For the case where the two photons are of different color, it is shown that fringe width of the interfering photon depends not only on its own wavelength, but also on the wavelength of the other photon which it is entangled with.


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