ABSTRACT
During the COVID-19 pandemic since early 2020 in Indonesia, the demand for electrical energy in the housing sector has increased significantly. This is due to the government’s recommendation to reduce activities on the outside and work from home, specifically for educational and entertainment activities. Those are almost recommended to be done online. Many people complain about the increase in monthly electricity payments compared to before the pandemic. The construction of solar power plants in housing/solar home systems (SHS) will reduce the electricity consumption from the public grid. This SHS installation can be used to supply some household electricity needs, such as computers, televisions, internet facilities, lighting, et cetera. In this article, the researchers discuss the performance testing of SHS with a capacity of 300 Wp. It is installed in the house buildings accompanied by the design and measurement of solar energy potential. © 2022, Institute of Advanced Engineering and Science. All rights reserved.
ABSTRACT
BACKGROUND: Interleukin-1 receptor antagonist (IL-1Ra) also known as Anakinra is a receptor antagonist of IL-1 especially IL-1β. IL-1β increased in infected COVID-19 patient groups. This study aimed that the IL-1Ra contained in Conditioned Medium Wharton’s Jelly Mesenchymal Stem Cells (CM-WJMSCs) has the potential to inhibit IL-1β which is one of the cytokine storms that occur in COVID patients through an in--silico approach. AIM: This study aims to determine the effect of in silico approach pro-inflammatory protein interleukin 1β (IL-1 β) and IL-1Ra protein as cytokine WJ-MSCs for potential treatment of COVID-19 disease. METHODS: 3D structure using the homology modeling method on Swiss Model web-server. Molecular docking was performed to analyze the binding mode of the IL-1β related to COVID-19 with IL-1Ra and the docking results were fixed using FireDock web-server. RESULTS: These results of the docking of proteins between IL-1β and the CM-WJMSCs component, namely IL-1Ra showed that IL-1Ra has criteria for docking on IL-1β such as the good score for QMEAN, good CscoreLB, and BS-score results, and the lowest energy obtained was −585.1 KJ/mol. It can be predicted that IL-1Ra can inhibit IL-1β which causes cytokine storms in COVID-19 patients. CONCLUSION: Based on the result, CM-WJMSC has potential treatment on the severity of COVID-19 infection. © 2022 Wahyu Widowati, Kusworini Handono, Marlina Marlina, Ika Adhani Sholihah, Diana Krisanti Jasaputra, Teresa Liliana Wargasetia, Mawar Subangkit, Ahmad Faried, Ermi Girsang, I Nyoman Lister, Chrismis Novalinda Ginting, Ita Margaretha Nainggolan, Rizal Rizal, Hanna Kusuma, Linda Chiuman.
ABSTRACT
SARS-CoV-2 is a virus that causes a serious life-threatening disease known as COVID-19. Patients with COVID19 can develop acute respiratory distress syndrome (ARDS) and multiorgan failure requiring safe and effective therapy. The human Wharton's Jelly Mesenchymal Stem Cells (hWJMSCs) can act as an anti-inflammatory and regenerative properties due to their secretion such as cytokine, growth factor, antimicrobial, and chemokine. A natural way of producing the secreted proteins of a cell (secretome) is by culturing mesenchymal stem cells (MSCs) under starvation or serum deprivation condition. This research was performed to measure the level of Fibroblast Growth Factor-7 (FGF-7), antibacterial protein LL-37 (LL-37), interleukin 1 Receptor Antagonist (IL-1ra), respectively, in the secretome of hWJMSCs. The secretome levels at: non-starvation, 24-, 48-, and 72-hours starvation periods were measured using ELISA method. The hWJMSCs secreted levels of FGF-7, LL-37, and IL-1ra were 46.74 - 72.13 pg/mL, 1.70 - 4.14 ng/mL, 1.35 - 8.32 pg/mL, respectively. The longer the starvation period of cells, the higher the protein levels produced. The hWJMSCs secrete FGF-7, LL-37, IL-1ra, longer starvation periods of cells will increase secretome levels. The hWJMSCs could potentially serve as adjuvant therapy for COVID-19. © 2021 IEEE.