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AAPE proliposomes for topical atopic dermatitis treatment
Jahn, Alexander,Song, Chung Kil,Balakrishnan, Prabagar,Hong, Soon-Sun,Lee, Ju-Hee,Chung, Suk-Jae,Kim, Dae-Duk Taylor & Francis 2014 Journal of microencapsulation Vol.31 No.8
<P><I>Context</I>: Anti-inflammatory effect of advanced adipose stem cell derived protein extract (AAPE) could be improved by minimising protein degradation. <I>Objective</I>: To develop a proliposomal formulation of AAPE for the treatment of topical atopic dermatitis. <I>Materials and methods</I>: Proliposomal powder was manufactured by evaporating a solution of soy phosphatidyl choline, AAPE and Poloxamer 407 in ethanol under vacuum on sorbitol powder. Characterisation of proliposomes (zeta potential, diameter, stability and flowability) as well as <I>in vivo</I> efficacy in a dermatitis mouse model was investigated. <I>Results and discussion</I>: Reconstitution of the proliposomal powder formed liposomes of 589 ± 3.6 nm diameter with zeta potential of −51.33 ± 0.36 mV. Protein stability was maintained up to 90 days at 25 °C as proliposomes. <I>In vivo</I> studies on atopic dermatitis mouse model showed a significant reduction in IgE levels after topical AAPE proliposome treatment. <I>Conclusion</I>: AAPE proliposomes maintained protein stability and showed promising results for atopic dermatitis treatment.</P>
Gamze ER,Alexander JAHN,Shah Abid ALI,Man-Gi CHO 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.4
Biofilm-based Photobioreactors (PBRs) use microalgal biomass immobilized on a substrate with reduced water content and consumption when compared to conventional suspended cultivation. CO2 and carbonate are used by microalgae as inorganic carbon source and their consumption is an indicator for metabolic activity and biomass accumulation. Here CO2 uptake, holdup and release in and from the culture were measured and correlated with gravimetrically determined biofilm mass. For this, a wicking based flat panel biofilm PBR including CO2/O2 gas control was developed, and the CO2 uptake and holdup determined by CO2 NIR off-gas analysis. The cyanobacteria Chlamydomonas asymmetrica were cultivated on hydrophilic modified expanded UHMWPE plates over circulating AF6 medium at 30°C and fluorescent light illumination about 710.01 µW/cm<sup>2</sup>. CO2 holdup in the system was subtracted from values determined during biofilm cultivation at stationary and growth conditions and correlated with measured biomass. From the gas holdup a minimum feasible cultivation size, dependent on the NIR-CO2 sensor sensitivity, for the use of the developed method was estimated. Results suggest the potential use of gas holdup measurement for biofilm growth assessment in medium and large-scale closed cultivations.
Byeongwoo Ko,Seunghye Kang,Minho Kim,Mangi Cho,Antonio Delgado,Alexander Jahn 한국산업식품공학회 2020 학술대회 및 심포지엄 Vol.2020 No.11
Currently, domestic seaweed production is about 800,000 tons per year, which is the largest seaweed production in the world after China and Japan. However, most seaweeds (Pyropia ssp, Undaria pinnatifida, Saccharina japonica, etc) are consumed in the form of dried products or hot water extracts, and there are many difficulties in developing various products due to difficulties in the manufacturing process. Through the pulsed electric field treatment device, the extraction efficiency can be expected to increase compared to the convectional hot water extraction. Pulsed electric field technology is a non-heating treatment technology in which high-voltage electric energy is processed into cells in the form of pulses, affecting the potential difference of cell membranes, and performing collapse or perforation treatment. In this study, components such as protein and carbohydrate content were extracted by treating Saccharina japonica with PEF, and compared with the hot water extraction method, As a result of experiment at voltages of 0.7 and 1.5㎸ and pulse duration of 5㎲, the crude protein content increased by up to 42% and the sugar content increased by up to 30% compare to the hot water extraction. Higher efficiency results can be expected through optimization of several parameters that may affect the extraction process.