Effect of Enhancers on in vitro and in vivo Skin Permeation and Deposition of S-Methyl-(L)-Methionine

S-methyl-(L)-methionine (SMM), also known as vitamin U, is commercially available as skin care cosmetic products for its wound healing and photoprotective effects. However, the low skin permeation expected of SMM due to its hydrophilic nature with a log P value of −3.3, has not been thoroughly addressed. The purpose of this study thus was to evaluate the effect of skin permeation enhancers on the skin permeation/deposition of SMM. Among the enhancers tested for the in vitro skin permeation and deposition of SMM, oleic acid showed the most significant enhancing effect. Moreover, the combination of oleic acid and ethanol further enhanced in vitro permeation and deposition of SMM through hairless mouse skin. Furthermore, the combination of oleic acid and ethanol significantly increased the in vivo deposition of SMM in the epidermis/dermis for 12 hr, which was high enough to exert a therapeutic effect. Therefore, based on the in vitro and in vivo studies, the combination of oleic acid and ethanol was shown to be effective in improving the topical skin delivery of SMM, which may be applied in the cosmetic production process for SMM.

Non-infected and Infected Bronchogenic Cyst: The Correlation of Image Findings with Cyst Content / 결핵및호흡기질환

We hereby report a case on bronchogenic cyst which is initially non-infected, then becomes infected after bronchoscopic ultrasound (US)-guided transesophageal fine-needle aspiration (FNA). The non-infected bronchogenic cyst appears to be filled with relatively echogenic materials on US, and the aspirate is a whitish jelly-like fluid. Upon contrast-enhanced MRI of the infected bronchogenic cyst, a T1-weighted image shows low signal intensity and a T2-weighted image shows high signal intensity, with no enhancements of the cyst contents, but enhancements of the thickened cystic wall. The patient then undergo video-assisted thoracic surgery 14 days after the FNA. The cystic mass is known to be completely removed, and the aspirate is yellowish and purulent. To understand the image findings that pertain to the gross appearance of the cyst contents will help to diagnose bronchogenic cysts in the future.

Delayed and Long-term Remission of Refractory Hemolytic Anemia in a Child with Systemic Lupus Erythematosus Treated with Rituximab

Autoimmune hemolytic anemia (AIHA) is a relatively common cause of anemia in children and adults with systemic lupus erythematosus (SLE). Although AIHA responds to steroids, in case of refractory or steroid-dependent AIHA, immunosuppressants and intravenous immunoglobulin have been used as second line agents. Rituximab, an anti-CD20 monoclonal antibody, is emerging in the treatment of SLE refractory to conventional therapy. Herein, we report a case of delayed and sustained remission of refractory hemolytic anemia in a child with SLE, post rituximab treatment. A 12-year-old female child with dizziness was referred to our department and was diagnosed with SLE combined with hemolytic anemia and renal tubular acidosis. Since frequent relapse of hemolytic anemia had occurred during the steroid tapering course, even though she had been treated with additional immunosuppressants (azathioprine, mycophenolate mofetil), the patient received 2 doses of rituximab 500 mg at 2 weeks interval at 18 months post diagnosis. After 15 months of rituximab administration, her anemia and renal tubular acidosis were fully recovered, enough to stop all medications. She remained well without recurrence for up to 3 years and 4 months after rituximab treatment.

An Unusual Case of Severe Neonatal Lupus Mimicking Neonatal Sepsis and Literature Review

Neonatal lupus is an uncommon autoimmune disease that results from transplacental passage of the maternal anti-SSA/Ro and/or anti-SSB/La antibodies. Pancytopenia or severe jaundice is a rare manifestation of neonatal lupus, respectively, and could be misdiagnosed with other neonatal illnesses, such as infection, hematologic disease, or hepatobiliary disease. Here, we report an unusual case of a premature newborn with severe neonatal lupus manifested with skin rash, fever, pancytopenia, and severe jaundice with abnormal liver function tests. His mother had been clinically asymptomatic before delivery; however, she revealed peripheral edema, bilateral pleural effusion, and ascites after delivery and diagnosed with systemic lupus erythematosus based on positive anti-nuclear and anti-cardiolipin antibodies, proteinuria, and serositis. The newborn and his mother had anti-SSA/Ro and anti-SSB/La antibodies. His pancytopenia and jaundice were progressively aggravated, and his illness was confused with neonatal sepsis or biliary obstruction. We decided to treat with high dose of corticosteroid and intravenous immunoglobulin, and he gradually recovered completely with the treatment. His corticosteroid was stopped at 5 months of age without relapse or complication.