Clinical course of patients with severe SARS-CoV-2 infection co-treatment with Jin Si Herbal Tea in Eastern Taiwan: A retrospective cohort study.

Introduction: Coronavirus disease-2019 (COVID-19) has affected more than 608 million people and has killed 6.5 million people in the world. A few studies showed traditional Chinese medicine can be beneficial for COVID-19 treatment. An herbal preparation Jin Si Herbal Tea (JS) was formulated with herbal extracts known for their potential to decrease spike protein and ACE2 interaction, 3CL, and TRPMSS2 protease activity, and thus aimed to evaluate the clinical course of JS co-treatment along with the usual treatment schedule given for severe COVID-19 patients. Methods: This retrospective cohort study included patients with severe COVID-19 admitted to Hualien Tzu Chi Hospital between June and July 2021. All the patients were co-treated with JS and the primary outcome was death. The secondary outcomes included laboratory exam, Ct value, clinical course, and hospital stays. There were 10 patients recruited in this study and divided into < 70 years and ≧ 70 years groups (n = 5 in each group). Results: Older patients (≧70 years) had a higher Charlson Comorbidity Index, VACO index, and lower hemoglobin levels than < 70 years patients. The trend of lymphocyte count, LDH, D-dimer, and Ct value of non-survivors was not consistent with previous studies. The death rate was 20% and the recovery rate to mild illness in 14 days was 40%. Conclusion: In conclusion, this is the first clinical study of JS co-treatment in severe COVID-19 patients. JS co-treatment might reduce death rate and recovery time. Further large-scale clinical trials would be expected.

Spinal 5-HT2A receptor is involved in electroacupuncture inhibition of chronic pain.

Knee osteoarthritis (KOA) is a highly prevalent, chronic joint disorder, and it is a typical disease which can develop chronic pain. Our previous study has proved that endocannabinoid (2-AG)-CB1R-GABA-5-HT pathway is involved in electroacupuncture (EA) mediated inhibition of chronic pain. However, it is still unclear which among the 5-HT receptor subtype is involved in EA evoked 5-HT mediated inhibition of chronic pain in the dorsal spinal cord. 5-HT2A is a G protein-coupled receptor and it is involved in 5-HT descending pain modulation system. We found that EA treatment at frequency of 2 Hz +1 mA significantly increased the expression of 5-HT2A receptor in the dorsal spinal cord and intrathecal injection of 5-HT2A receptor antagonist or agonist reversed or mimicked the analgesic effect of EA in each case respectively. Intrathecal injection of a selective GABAA receptor antagonist Bicuculline also reversed the EA effect on pain hypersensitivity. Additionally, EA treatment reversed the reduced expression of GABAA receptor and KCC2 in the dorsal spinal cord of KOA mice. Furthermore, we demonstrated that intrathecal 5-HT2A receptor antagonist/agonist reversed or mimicked the effect of EA up-regulate of KCC2 expression, respectively. Similarly, intrathecal injection of PLC and PKC inhibitors prevented both anti-allodynic effect and up-regulation of KCC2 expression by EA treatment. Our data suggest that EA treatment up-regulated KCC2 expression through activating 5-HT2A-Gq-PLC-PKC pathway and enhanced the inhibitory function of GABAA receptor, thereby inhibiting chronic pain in a mouse model of KOA.

Electrical signal propagated across acupoints along Foot Taiyang Bladder Meridian in rats.

OBJECTIVE: To investigate the electrical signals propagated along Foot Taiyang Bladder Meridian (BL) in a rat model. METHODS: The experiments were performed on Dark-Agouti (DA), DA.1U and Sprague Dawley (SD) rats. The antidromic electrical stimulation was applied on the nerve innervating "Pishu" (BL 20) to mimic the acupoint electro-acupuncture (EA). The activities recording from adjacent nerve innervating acupoint "Danshu" (BL 19) or "Weishu" (BL 21) were recorded as indics for acupoint, including the mechanical threshold and discharge rate. RESULTS: After mimic EA on BL 20, C and Aδ units from adjacent BL 19 or BL 21 were sensitized including the decrease in mechanical threshold and increase in discharge rates in DA, DA.1U and SD rats, especially in DA rats. The average discharge rate increased from 2.40±0.26 to 6.06±0.55 and from 1.92±0.42 to 6.17±1.10 impulse/min (P<0.01), and the mechanical threshold decreased from 0.52±0.12 to 0.24±0.05 and from 0.27±0.02 to 0.16±0.01 mmol/L (P<0.01) in C (n=15) and Aδ (n=18) units in DA rats. The net change in discharge rates from C units were 152.5%, 144.7% and 42.4% in DA, DA.1U and SD rats, respectively, among which DA rat's was the highest (P<0.05). In Aδ units, the net change in DA rats were also the highest (221.5%, 139.2% and 49.2% in DA, DA.1U and SD rats). CONCLUSIONS: These results showed that mimic acupoint EA activated adjacent acupoints along BL in three rat strains, which might be related to propagated sensation along meridians (PSM). In addition, DA rats were more sensitive and might be a good model animal for PSM research.