A "high-performance" liquid-chromatographic separation of retinoids (retinol, isotretinoin, all-trans retinoic acid, retinal, etretinate, and retinyl acetate) in serum is described. The separation was used in developing a quantitative assay for retinol (vitamin A) and two therapeutic analogs, isotretinoin (13-cis-retinoic acid) and etretinate (Ro 10-9359). The procedure requires 1 mL of serum. ...

Isotretinoin was approved by the Food and Drug Administration (FDA) in 1982 and revolutionized acne therapy. Soon afterwards, case reports appeared suggesting a link between inflammatory bowel disease and use of isotretinoin. As reviewed in this article, an increasing number of case-control and prospective (cohort) studies have been reported that examined associations between use of isotretinoi...

OBJECTIVES This study aims to evaluate the clinical effects of isotretinoin (13-cis-retinoic acid), a derivative of retinoic acid, on the clinical features of chronic rhinosinusitis. PATIENTS AND METHODS The study group included 25 chronic rhinosinusitis patients (16 females, 9 males; mean age 25.2 ± 6.8 years; range 15 to 25 years) who were on isotretinoin for acne treatment, while the contr...

Muscle-related complaints and high creatine kinase (CK) blood levels have been reported in 16-51% of patients with acne treated with isotretinoin. It has been suggested that this retinoid and exercise have a synergistic effect on muscle. The presence of marked hyperCKemia during the treatment raises concern about rhabdomyolysis. The objective of this report was to evaluate the incidence, course...

Elexacaftor/tezacaftor/ivacaftor (Trikafta®) is a novel treatment for patients with cystic fibrosis (CF) recently associated acneiform eruptions (“Trikafne”).1-5 However, few studies have described strategies drug-induced acne in CF, many of whom already significant prior antibiotic use. We performed case series Trikafta®-induced treated isotretinoin. In Case 1, 23-year-old man developed lesion...

High effectiveness of isotretinoin treatment for severe types of acne resistant to antibiotics has been widely recognized. However, the recommended doses in conventional therapy, according to consensus of the Polish Dermatological Society, may cause serious adverse effects. Thus, research into less stressful, alternative treatment regimens with the use of low doses of isotretinoin has been carr...

Acne vulgaris is a skin disorder of the sebaceous follicles, involving hyperkeratinization and perifollicular inflammation. Matrix metalloproteinases (MMP) have a predominant role in inflammatory matrix remodeling and hyperproliferative skin disorders. We investigated the expression of MMP and tissue inhibitors of MMP (TIMP) in facial sebum specimens from acne patients, before and after treatme...

Isotretinoin (13-cis-Retinoic acid) is a poor water soluble drug, commonly used in the treatment of severe cases of acne. The aim of this project is to formulate isotretinoin in form of tablet and enhance its solubility and dissolution rate; by the use of formulations containing either surfactant (SLS and Tween20) or HP-β-CD. The critical micelle concentration for each surfactant was determined...

Systemic treatment is required in patients with moderate-to-severe acne, especially when acne scars start to occur. Antibiotics with anti-inflammatory properties, such as tetracyclines (oxytetracycline, tetracycline chloride, doxycycline, minocycline and limecycline) and macrolide antibiotics (erythromycin and azithromycin) are the agents of choice for papulopustular acne, even though the emerg...

Retinoids are used in the treatment of inflammatory skin diseases and malignancies, but studies characterizing the in vivo actions of these drugs in humans are lacking. Isotretinoin is a pro-drug for all-trans retinoic acid, which can induce long-term remissions of acne; however, its complete mechanism of action is unknown. We hypothesized that isotretinoin induces remission of acne by normaliz...