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1.
Am J Chin Med ; 49(8): 1965-1999, 2021.
Article in English | MEDLINE | ID: covidwho-1599109

ABSTRACT

Pulmonary fibrosis (PF) is a chronic and irreversible interstitial lung disease that even threatens the lives of some patients infected with COVID-19. PF is a multicellular pathological process, including the initial injuries of epithelial cells, recruitment of inflammatory cells, epithelial-mesenchymal transition, activation and differentiation of fibroblasts, etc. TGF-[Formula: see text]1 acts as a key effect factor that participates in these cellular processes of PF. Recently, much attention was paid to inhibiting TGF-[Formula: see text]1 mediated cell processes in the treatment of PF with Chinese herbal medicines (CHM), an important part of traditional Chinese medicine. Here, this review first summarized the effects of TGF-[Formula: see text]1 in different cellular processes of PF. Then, this review summarized the recent research on CHM (compounds, multi-components, single medicines and prescriptions) to directly and/or indirectly inhibit TGF-[Formula: see text]1 signaling (TLRs, PPARs, micrRNA, etc.) in PF. Most of the research focused on CHM natural compounds, including but not limited to alkaloids, flavonoids, phenols and terpenes. After review, the research perspectives of CHM on TGF-[Formula: see text]1 inhibition in PF were further discussed. This review hopes that revealing the inhibiting effects of CHM on TGF-[Formula: see text]1-mediated cellular processes of PF can promote CHM to be better understood and utilized, thus transforming the therapeutic activities of CHM into practice.


Subject(s)
Cell Physiological Phenomena/drug effects , Drugs, Chinese Herbal/therapeutic use , Pulmonary Fibrosis/drug therapy , Signal Transduction/drug effects , Transforming Growth Factor beta1/antagonists & inhibitors , COVID-19/complications , COVID-19/metabolism , COVID-19/virology , Humans , Medicine, Chinese Traditional/methods , Phytotherapy/methods , Pulmonary Fibrosis/complications , Pulmonary Fibrosis/metabolism , SARS-CoV-2/physiology , Transforming Growth Factor beta1/metabolism
2.
Oxid Med Cell Longev ; 2021: 9919466, 2021.
Article in English | MEDLINE | ID: covidwho-1358940

ABSTRACT

Thrombus is considered to be the pathological source of morbidity and mortality of cardiovascular disease and thrombotic complications, while oxidative stress is regarded as an important factor in vascular endothelial injury and thrombus formation. Therefore, antioxidative stress and maintaining the normal function of vascular endothelial cells are greatly significant in regulating vascular tension and maintaining a nonthrombotic environment. Leonurine (LEO) is a unique alkaloid isolated from Leonurus japonicus Houtt (a traditional Chinese medicine (TCM)), which has shown a good effect on promoting blood circulation and removing blood stasis. In this study, we explored the protective effect and action mechanism of LEO on human umbilical vein endothelial cells (HUVECs) after damage by hydrogen peroxide (H2O2). The protective effects of LEO on H2O2-induced HUVECs were determined by measuring the cell viability, cell migration, tube formation, and oxidative biomarkers. The underlying mechanism of antioxidation of LEO was investigated by RT-qPCR and western blotting. Our results showed that LEO treatment promoted cell viability; remarkably downregulated the intracellular generation of reactive oxygen species (ROS), malondialdehyde (MDA) production, and lactate dehydrogenase (LDH); and upregulated the nitric oxide (NO) and superoxide dismutase (SOD) activity in H2O2-induced HUVECs. At the same time, LEO treatment significantly promoted the phosphorylation level of angiogenic protein PI3K, Akt, and eNOS and the expression level of survival factor Bcl2 and decreased the expression level of death factor Bax and caspase3. In conclusion, our findings suggested that LEO can ameliorate the oxidative stress damage and insufficient angiogenesis of HUVECs induced by H2O2 through activating the PI3K/Akt-eNOS signaling pathway.


Subject(s)
Gallic Acid/analogs & derivatives , Oxidative Stress/drug effects , Signal Transduction/drug effects , Cell Movement/drug effects , Cell Survival/drug effects , Gallic Acid/pharmacology , Human Umbilical Vein Endothelial Cells , Humans , Hydrogen Peroxide/pharmacology , Malondialdehyde/metabolism , Medicine, Chinese Traditional , Neovascularization, Physiologic/drug effects , Nitric Oxide Synthase Type III/metabolism , Phosphatidylinositol 3-Kinases/metabolism , Protective Agents/pharmacology , Proto-Oncogene Proteins c-akt/metabolism , Reactive Oxygen Species/metabolism , Superoxide Dismutase/metabolism
3.
Int J Gen Med ; 14: 2047-2052, 2021.
Article in English | MEDLINE | ID: covidwho-1256165

ABSTRACT

INTRODUCTION: Novel coronavirus pneumonia (COVID-19) is an acute respiratory infectious disease, which has the characteristic of human-to-human transmission and is extremely contagious. Correctly standardizing the process of early screening of infection or suspected cases in the fever clinic has become a key part of the fight against the pandemic. METHODS: A retrospective analysis of patients in the fever clinic of Shenyang Medical College Affiliated Central Hospital from January 23 to March 1, 2020, was conducted in the present study. RESULTS: It was found that 16 suspected cases of COVID-19 in the fever clinic were diagnosed with respiratory infections, accounting for 0.59%. CONCLUSION: In case of a negative result in the second nucleic acid test, strategic triage and typing might be more conducive for the following nucleic acid tests for suspected cases in order to prevent the spread of the epidemic caused by missed diagnosis.

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