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A strain of Propionibacterium acnes (type I; Marples & McGinley, 1974), isolated from a blackhead acne lesion, produced an acid phosphatase which was present in the culture supernatant in the late-exponential and early-stationary phases of growth. This acid phosphatase was purified more than 45
Phloretin is a natural chalcone with antibacterial and anti-inflammatory effects. This study investigated the anti-acne activity of phloretin against Propionibacterium acnes-induced skin infection and the potential target proteins of its anti-inflammatory and antibacterial effects. Phloretin
Immunopotentiated rats, which were injected with Propionibacterium acnes or BCG, had the 50% survival twice as long as those in untreated controls after intravenous inoculation of Sato lung carcinoma (SLC) cells. The amount of labeled tumor cells in the lung of the adjuvant-treated rats decreased
A single intraperitoneal injection of the phenol-treated cells of Propionibacterium acnes into mice showed nonspecific resistance against subsequent lethal doses of an intraperitoneal challenge of Klebsiella pneumoniae, Staphylococcus aureus, and Streptococcus pyogenes. The protection showed a
Toll-like receptors (TLRs) on keratinocytes are important cell surface receptors involved in the innate and acquired immune response to invading microorganisms. In acne vulgaris, TLR2 activation by Propionibacterium acnes (P. acnes) may induce skin inflammation via induction of various
Propionibacterium acnes was grown in continuous culture in the presence of propylene phenoxetol. At sub-lethal concentrations of this antimicrobial agent (0.025-0.1% w/v) steady-state growth conditions were achieved. In comparison with the control, cell biomass, maximum specific growth rates and
This study shows that severe acne is characterized by numerous inflammatory parameters. The group of acne tetrad patients differed from those with conglobate acne in many laboratory measurements. The treatment with 13-cis-retinoic acid was well tolerated by all patients. Sebum suppression and an
Although dietary vitamin A is required for normal growth and development, long-term or high-dose administration of vitamin A derivatives (retinoids) may produce a variety of skeletal side-effects in man. In this study we investigated the early effects of oral isotretinoin therapy on bone turnover
Serum levels of vitamin D metabolites were determined in 11 patients treated for cystic acne with a four-month course of isotretinoin (Roaccutane). The levels were measured before treatment and after two months of medication. We found a significant fall in the level of 1,25-dihydroxyvitamin D (p
Thirty strains of Propionibacterium acnes were grown in basal salt medium containing lecithin as a lipid substrate and in other media. The cultures were assayed for production of lipase (measured as fatty acid esterase) and other exoenzymes. Lipase was assayed spectrophotometrically; other enzymes
Results of the isotretinoin (13-cis-retinoic acid, Ro 4-3780) German Cooperative Study Group, with 198 acne conglobata patients being treated in 19 departments are reported. For the first 12 weeks (phase I) there was an open assignment to 0.2, 0.5 or 1.0 mg/kilogram bodyweight (kg bw). This was
The prolonged use of retinoids has been reported to be associated with changes of bone biochemical markers and toxic skeletal effects. Among collagen markers, type I collagen N-telopeptide (NTx) is present in all tissues that contain type I collagen, mostly in bone and in cutaneous tissue. It is a
BACKGROUND
High-dose isotretinoin has been reported to have adverse effects on bone mineral density (BMD); however, studies evaluating changes in BMD with isotretinoin therapy at different dosages and with varying treatment durations have produced conflicting results.
OBJECTIVE
To investigate the
Isotretinoin is an effective therapy for severe nodulocystic acne. Several experimental studies suggest that it may have an effect on vitamin D physiology. In the present study, the authors aimed to investigate the effect of isotretinoin treatment on the metabolism of vitamin D in acne patients. A