We report four cases of post coronavirus disease 2019 (COVID-19) condition in which the patients suffered from a severe sense of fatigue that was successfully treated with warming-tonifying therapy using bukuryoshigyakuto, allowing them to return to normal social life. All four patients were unable to engage in social or school activities and had difficulty performing daily living tasks. Initially, they were treated with Kampo formulas corresponding to the yang pattern, which proved ineffective. However, their sense of fatigue was relieved after starting bukuryosigyakuto. Case 1 (36-year-old man) was a latent yin-deficiency pattern, in which an electro-acupuncture test revealed his interior cold. In Case 2 (53-year-old man), Case 3 (17-year-old woman) and Case 4 (11-year-old boy), the administration of bukuryoshigyakuto was based on the presence of severe sense of fatigue, characterized by the need to lie down almost all day and worsening symptoms after walking several dozen meters or taking a bath. There have been some case reports of tonifying therapies being effective in treating post COVID-19 conditions which are considered examples of qi deficiency or qi and blood deficiency following acute infectious disease. Kampo therapy with warming-tonifying formulas may be useful for post COVID-19 conditions that correspond to a late yin stage pattern in the six stage classification, particularly those presenting with severe sense of fatigue.

Objective: To determine the appropriate time points to start regular exercise which could reduce age-related anxiety and impaired social behavior. Methods: For this study, 8-week-old male Wistar rats were divided into three groups: no exercise (NoEX), short-term exercise (S-Ex), and long-term exercise (L-Ex) groups. S-Ex-group rats started treadmill exercise at 12 months of age, while L-Ex rats started from at 2 months of age. Exercise rats were forced to walk on the treadmill three times per week, with 1- to 2-day intervals for 10 minutes during the first 2 weeks, at 10 m/min until 17 months of age, and at 8 m/min thereafter. At 19 months of age, behavioral tests were performed to assess the effects of exercise on age-induced behavioral change as well as quantitative polymerase chain reaction were done to uncover the mechanism behind the behavioral changes. Results: Anxiety-like behavior was improved by long-term exercise. Additionally, rats belonging to the S-Ex and L-Ex groups showed improved social behavior and increased curiosity about interesting objects. The qPCR data showed that treadmill exercise suppressed the expression of immediate-early genes in the prefrontal cortex of the aged rats. Conclusion This study suggests that long-term exercise represses early response genes, and in this way, it increases resistance to stress, diminishes anxiety-related behavior, and improves social behavior. These findings underscore the need to consider appropriate time to start exercise to prevent stress induced anxiety related behavior.

Lipoprotein(a) [Lp(a)] has been considered as an independent risk factor for arteriosclerotic diseases. With an anticipation that Lp(a) would also serve as a risk factor for abdominal aortic aneurysms (AAA), we analyzed serum and tissue Lp(a) levels of patients with AAA in relation to those in healthy individuals. Serum Lp(a) levels were significantly higher in the AAA group (53.2±60.8mg/dl) than in the healthy controls (14.6±13.6mg/d) (p<0.001). The Lp(a) level in the aneurysmal wall of patients with AAA was 49.8±38.2ng/mg. There was a significant correlation between serum and aneurysmal wall Lp(a) levels in AAA patients (r²=0.79, p<0.01). Immunohistochemical examination revealed Lp(a) in the extracellular matrix of the middle layer of the tunica intima, but not in the tunica media or externa.