Qian Wang

2021, 2(1): 1–2. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.001

Visarut Buranasudja, Anongnat Somwangthanaroj, Suched Likitlersuang, Tirawat Boonyatee, Chartchalerm Isarankura-Na-Ayudhya, Jittima Amie Luckanagul

2021, 2(1): 3–9. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.002

Ting Ge, Shengfeng Cheng

2021, 2(1): 10–18. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.003

The ongoing coronavirus disease 2019 (COVID-19) pandemic is a serious challenge faced by the global community. Physical scientists can help medical workers and biomedical scientists, engineers, and practitioners, who are working on the front line, to slow down and eventually contain the spread of the COVID-19 virus. This review is focused on the physicochemical characteristics, including composition, aerodynamics, and drying behavior of respiratory droplets as a complex and multicomponent soft matter system, which are the main carrier of the virus for interpersonal transmission. The distribution and dynamics of virus particles within a droplet are also discussed. Understanding the characteristics of virus-laden respiratory droplets can lead to better design of personal protective equipment, frequently touched surfaces such as door knobs and touchscreens, and filtering equipment for indoor air circulation. Such an understanding also provides the scientific basis of public policy, including social distancing rules and public hygiene guidelines, implemented by governments around the world.

Yiqing Wang, Xiangyu Chu, Bing Wang

2021, 2(1): 19–29. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.004

Recombinant adeno-associated viral (rAAV) vector-mediated gene delivery is a novel molecular therapeutic approach for musculoskeletal disorders which achieves tissue regeneration by delivering a transgene to the impaired tissue. In recent years, substantial scientific progress in rAAV gene therapy has led to several clinical trials for human musculoskeletal diseases. Nevertheless, there are still limitations in developing an optimal gene therapy model due to the low transduction efficiency and fast degradation of the gene vectors. To overcome the challenges of rAAV gene therapy, tissue engineering combined with gene therapy has emerged as a more promising alternative. An rAAV viral vector incorporated into a biomaterial has a more controlled gene expression, lower immune response, and higher efficiency. A number of biomaterials and architectures have been combined with rAAV viral vectors, each having its own advantages and limitations. This review aims to give a broad introduction to combinatorial therapy and the recent progress this new technology has offered.

Kaewta Rattanapisit, Gorawit Yusakul, Balamurugan Shanmugaraj, Kittinop Kittirotruji, Phassorn Suwatsrisakul, Eakachai Prompetchara, Suthira Taychakhoonavud

2021, 2(1): 43–49. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.006

The outbreak of the novel coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), spread rapidly causing a severe global health burden. The standard COVID-19 diagnosis relies heavily on molecular tests to detect viral RNA in patient samples; however, this method is costly, requires highly-equipped laboratories, multiple reagents, skilled laboratory technicians, and takes 3-6 hours to complete. To overcome these limitations, we developed a plant-based production platform for the SARS-CoV-2 receptor-binding domain as an economical source of detection reagents for a lateral-flow immunoassay strip (LFIA) which is suitable for detection of IgM/IgG antibodies in human samples. Further, we validated the plant-produced SARS-CoV-2 receptor-binding domain-based LFIA as a useful diagnostic tool for COVID-19. A total of 51 confirmed COVID-19 serum samples were tested using the LFIA, and the obtained results were consistent with those from polymerase chain reaction assays, while providing sensitivity and specificity of 94.1% and 98%, respectively. The developed LFIA is rapid, scalable, user-friendly, and relatively inexpensive with a simple test procedure, making it useful for the routine monitoring of COVID-19 in clinical settings. This study was approved on March 19, 2020 by the Ethics Committee of the Faculty of Medicine, Chulalongkorn University (COA No. 354/2020 and IRB No. 236/63).

Dahae Seong, Monchupa Kingsak, Yuan Lin, Qian Wang, Shamia Hoque

2021, 2(1): 50–60. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.007

The current coronavirus disease 2019 (COVID-19) pandemic has reinforced the necessity of understanding and establishing baseline information on the fate and transport mechanisms of viruses under indoor environmental conditions. Mechanisms governing virus interactions in built spaces have thus far been established based on our knowledge on the interaction of inorganic particles in indoor spaces and do not include characteristics specific to viruses. Studies have explored the biological and kinetic processes of microbes’ attachments on surfaces in other fields but not in the built environment. There is also extensive literature on the influence of indoor architecture on air flow, temperature profiles, and forces influencing aerosol transport. Bridging the gap between these fields will lead to the generation of novel frameworks, methodologies and know-how that can identify undiscovered pathways taken by viruses and other microbes in the built environment. Our study summarizes the assessment of the influence of surface properties on the adhesion kinetics of vaccinia virus on gold, silica, glass, and stainless-steel surfaces. We found that on gold the virus layer was more viscoelastic compared to stainless-steel. There was negligible removal of the layer from the stainless-steel surface compared to the others. The results further highlight the importance of converging different fields of research to assess the fate and transport of microbes in indoor built spaces.

Pingli Wu, Yangyang Liang, Guoming Sun

2021, 2(1): 61–71. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.008

The progress of biomaterials and tissue engineering has led to significant advances in wound healing, but the clinical therapy to regenerate perfect skin remains a great challenge. The implantation of biomaterial scaffolds to heal wounds inevitably leads to a host immune response. Many recent studies revealed that the immune system plays a significant role in both the healing process and the outcome. Immunomodulation or immuno-engineering has thus become a promising approach to develop pro-regenerative scaffolds for perfect skin regeneration. In this paper, we will review recent advancements in immunomodulating biomaterials in the field of skin repair and regeneration, and discuss strategies to modulate the immune response by tailoring the chemical, physical and biological properties of the biomaterials. Understanding the important role of immune responses and manipulating the inherent properties of biomaterials to regulate the immune reaction are approaches to overcome the current bottleneck of skin repair and regeneration.

Xiangyu Deng, Zengwu Shao, Yanli Zhao

2021, 2(1): 72–85. doi:https://doi.org/10.3877/cma.j.issn.2096-112X.2021.01.009

Sonodynamic therapy for malignant tumours has gained much attention for its deep penetration effect and efficient tumour killing ability. The design, modification, and utilization of sonosensitizers are important aspects of sonodynamic therapy. As an essential factor in this process, highly effective sonosensitizers should be developed to facilitate the clinical applications of sonodynamic therapy. This review takes porphyrin- and titanium dioxide (TiO₂)-based systems as representative organic and inorganic sonosensitizers respectively, and summarizes their characteristics and biological effects as sonodynamic therapy. Upon discovery of novel sonosensitizers, sonodynamic therapy becomes an efficient means of adjuvant therapy for the treatment of malignant tumours.