ABSTRACT
Background@#Extracellular vesicles (EVs) derived from plants have emerged as potential candidates for cosmetic and therapeutic applications. In this study, we isolated EVs from Aloe vera peels (A-EVs) and investigated the antioxidant and wound healing potential of A-EVs. @*Methods@#A-EVs were isolated by ultracentrifugation and tangential flow filtration and were characterized using transmission electron microscopy, nanoparticle tracking analysis. The cytotoxicity and cellular uptake of A-EVs were investigated by WST-1 assay and flow cytometry. The antioxidant effect of A-EVs was evaluated by superoxide dismutase (SOD) activity assay and cellular antioxidant activity (CAA) assay. The wound healing potential was assessed by in vitro scratch assay using human keratinocytes (HaCaT) and fibroblasts (HDF). The expression of nuclear factor erythroid 2–related factor 2 (Nrf2) and their associated genes was analyzed by quantitative RT-PCR. @*Results@#A-EVs displayed a round shape and had diameters from 50 to 200 nm. A-EVs showed good cytocompatibility on human skin cells and were internalized into HaCaT cells via clathrin-, caveolae-mediated endocytosis, and membrane fusion. The SOD activity and CAA assays exhibited that A-EVs had antioxidant activity and reduced intracellular ROS levels in H2O2-treated HaCaT cells in a dose-dependent manner. A scratch assay showed that A-EVs enhanced the migration ability of HaCaT and HDF. Moreover, A-EVs significantly upregulated the mRNA expression of Nrf2, HO-1, CAT, and SOD genes in H2O2-treated HaCaT cells. Our findings reveal that A-EVs could activate the antioxidant defense mechanisms and wound healing process via the Nrf2 activation. @*Conclusion@#Overall results suggest that the A-EVs are promising as a potential agent for skin regeneration.
ABSTRACT
Background@#Extracellular vesicles (EVs) derived from plants have emerged as potential candidates for cosmetic and therapeutic applications. In this study, we isolated EVs from Aloe vera peels (A-EVs) and investigated the antioxidant and wound healing potential of A-EVs. @*Methods@#A-EVs were isolated by ultracentrifugation and tangential flow filtration and were characterized using transmission electron microscopy, nanoparticle tracking analysis. The cytotoxicity and cellular uptake of A-EVs were investigated by WST-1 assay and flow cytometry. The antioxidant effect of A-EVs was evaluated by superoxide dismutase (SOD) activity assay and cellular antioxidant activity (CAA) assay. The wound healing potential was assessed by in vitro scratch assay using human keratinocytes (HaCaT) and fibroblasts (HDF). The expression of nuclear factor erythroid 2–related factor 2 (Nrf2) and their associated genes was analyzed by quantitative RT-PCR. @*Results@#A-EVs displayed a round shape and had diameters from 50 to 200 nm. A-EVs showed good cytocompatibility on human skin cells and were internalized into HaCaT cells via clathrin-, caveolae-mediated endocytosis, and membrane fusion. The SOD activity and CAA assays exhibited that A-EVs had antioxidant activity and reduced intracellular ROS levels in H2O2-treated HaCaT cells in a dose-dependent manner. A scratch assay showed that A-EVs enhanced the migration ability of HaCaT and HDF. Moreover, A-EVs significantly upregulated the mRNA expression of Nrf2, HO-1, CAT, and SOD genes in H2O2-treated HaCaT cells. Our findings reveal that A-EVs could activate the antioxidant defense mechanisms and wound healing process via the Nrf2 activation. @*Conclusion@#Overall results suggest that the A-EVs are promising as a potential agent for skin regeneration.
ABSTRACT
A 68-year-old man was admitted due to abdominal pain. He was diagnosed as having recurrent pancreatitis with a pseudocyst, which is communicated through the main pan- creatic duct. An endoscopic pancreatic sphincterotomy and insertion of a nasopancreatic tube into the main pancreatic duct via transpapillary drainage were performed. As a result, the pseudocyst disappeared and the pain was relieved. Thus it was concluded that transpapillary drainage via the main pancreatic duct is a safe and effective treatment for pancreatic pseudocysts, which is communicated through the main pancreatic duct.
Subject(s)
Aged , Humans , Abdominal Pain , Drainage , Pancreatic Ducts , Pancreatic Pseudocyst , PancreatitisABSTRACT
Ichthyosis hystrix is a localized variant of Bullous Congenital Ichthyosiform Erythroderma by Broq, and also, localized form of Epidermolytic hyperkeratosis according to Frost and Van Scott's classification of ichthyosi-form dermatoses. Clinically it is generally considered to be widespread systematized epidermal nevus, and demonstrating an autosomal dominant pattem of inheritance, and characterized by verrucous scale at or shortly after birth with particular involve- ment of flexural areas. A case of 21 year old girl with ichthyosis hystrix was reported, The skin lesion showed multiple rice to pea sized linear verrucous papules on left forearm, neck, axilla and upper chest. The skin biopsy was done, the finding shows remarked laminated hyperkeratosis, acanthosis, papillomatosis, and vacuoliization on malpighian layer. Diagnosis was confirmed by clinicaI apperance and histopathologicaI finding. The method of treatment is 0. 05% Vitamin A acid ointment application and show marked improvement.
Subject(s)
Female , Humans , Young Adult , Axilla , Biopsy , Classification , Diagnosis , Forearm , Hyperkeratosis, Epidermolytic , Ichthyosis , Neck , Nevus , Papilloma , Parturition , Pisum sativum , Porcupines , Skin , Skin Diseases , Thorax , Tretinoin , Vitamin A , Vitamins , WillsABSTRACT
Scleroderma is an incidious and chronic disease of unknown cause. The clinical picute of scleroderma is characterized by the apperance of circumscribed of diffuse, hard, smooth, ivory colored areas that are immobile upon upon the underlying tissues. It may be classified to as a localized form (morphea) and a systemic scleroderma or progressive systemic sclerosis (PSS) which is characterized by diffuse involvment of the connective tissue of the skin and certain intemal organs. The authors observed 3 cases of PSS and 6 cases of morphea. They have complained of marked sclerosis or thickening of skin or slowly developing dyspneadue to interstitial pulmonary fibrosis which were confirmed by chest X-ray. Recently, penicillamine-D has been advocated as a beneficial agent in scleroderma by Asboe-Hansen. therefore, penicillamine-D was administered to the above patients. Two of PSS were markedly improved with normal skin softness. Two of morphea were also moderately improved. Other patients remained stationary or no effect.
Subject(s)
Humans , Chronic Disease , Connective Tissue , Pulmonary Fibrosis , Scleroderma, Diffuse , Scleroderma, Localized , Scleroderma, Systemic , Sclerosis , Skin , ThoraxABSTRACT
Syringocystadenoma papilliferum is s rare tumor of disputed origin that was first reorted by peterson in 1892. Theclinical features of syringocystadenoma papilliferum are not constant. It may be present at birth or develop later in life. Its appearance varies from an irregular, flat, grey or reddish area to a grey or dark brown. raised and cauliflower-like surface. Sometimes it is moist, flesh or pedunculated and occasionally a verrucous plaque, or cyst may be seen. The typical lesion occurs most frequently on the scalp, and is a hairless smooth plaque until puberty, when a nodular verrucous transformation occurs. A 39 years old male patient had egg sized (3*5cm) and yellowish red colored verrucous tumor mass on his epigastric area, which had grown up slowly for 7 years. The diagnosis of syringocysyadenoma papilliferum was confirmed by histological examination. We repoet a case of syringocystadenoma papilliferum in unusually large size on the epigastric area.
Subject(s)
Adolescent , Adult , Humans , Male , Diagnosis , Ovum , Parturition , Puberty , ScalpABSTRACT
Acrokeratosis verruciformis is a familial disease characterized by indolent papules resembIing flat warts on the backs of the hands and feet with lesser involvement of volar surfaces, wrists, and ankles. A cas of 42 years old female with acrokeratosis verruciformis is reported. The skin lesions of this patient showed numerous rice to pea sized, flat-topped, round or polygonal, warty papules on the dorsal aspects of the hands and feet and also, pitted keratolysis on both volar surface of the hands. The hitologic findings were those of features of acrokeratosis verruciformis, i.e. the epidermis shows marked hyperkeratosis with slight acanthosis and papillomatosis and circumscribed elevations of the epidermis resembling church spires characteristically.
Subject(s)
Adult , Female , Humans , Ankle , Darier Disease , Epidermis , Foot , Hand , Papilloma , Pisum sativum , Skin , Warts , WristABSTRACT
Muchz-Habermann disease is cutaneous disease of unknown etilogy and characterized by a, polymorphous eruption consisting of papulosquamous, bemorrhagic, ulceronecrotic lesion eventually into varioliform scars. It is also classified into parapsoriasis group according to Broq with parapsoriasis en guttata (pityriasis lichenoides chronica), parapsoriasis en plaques, parapsoriasis en lichenoides. The 61-year-old male patient visited to Dermatologic Department of Severance Hospital due to sudden onset of generalized eruption. He presented pea to fingr tip sized erythematous, silvery maculo-papulo-squamous eruptions on trunk, extre- mities and buttock, but didnt complain of any subjective symptoms except markel fatigue. Skin biopsy was done on right forearm and was confirrr.ed to pityriasis lichenoides et varioliformis acuta by histopathologic finding. The lesion was completely controlled by oral tetracycline 2. Ogm per daily for first 4 wecks and reduced dosage l. Ogin per day for second 2 weeks.