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?:abstract
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ABSTRACT Background Hochuekkito extract (HET) has multiple effects through the digestive and immune systems, including for acute viral infection and chronic inflammation We review basic pharmacological and clinical researches of HET and discuss the effects of HET against the pandemic COVID-19 Methods We reviewed pharmacological studies from 1996 to 30 April 2020 that used experimental animals orally treated with HET and randomized controlled trials (RCTs) from 2000 to 30 April 2020 Results Altogether, 64 pharmacological studies reported immuno-stimulatory effects against infection and cancer, immuno-modulative effects against allergy and some inflammatory diseases, and ameliorating effects against exhaustion and frailty Nine RCTs showed improvement of pulmonary Mycobacterium avium complex disease on chest X-ray;improved systemic inflammation, nutrition, and quality of life of patients with chronic obstructive pulmonary disease and a decrease in the number getting common cold and exacerbations;reduction of soluble interleukin-2 receptor and the serum cortisol concentration of postoperative patients;a reduction of the incidence of inflammatory complications and C-reactive protein elevation after cerebrovascular disease;a reduction of the volume of steroid and tacrolimus during the treatment of atopic dermatitis;a healing effect for intractable chronic wounds;improvement of the physical status of elderly weak patients;and improvement of the fatigue level of cancer patients Conclusion CODIV-19 is characterized by high risk for the aged and people with other disease complications, cytokine hyperactivity in the severe stage, and sequelae in the recovery stage Considering the immune-stimulative/modulative effects of HET on inflammatory conditions and against exhaustion and frailty, it may be useful for prevention, treatment, and recovery from COVID-19
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