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Emerging Pathophysiological Roles of Ketone Bodies
Get PDFThe discovery of insulin approximately a century ago greatly improved the management of diabetes, including many of its life-threatening acute complications like ketoacidosis. This breakthrough saved many lives and extended the healthy lifespan of many patients with diabetes. However, there is still a negative perception of ketone bodies stemming from ketoacidosis. Originally, ketone bodies were thought of as a vital source of energy during fasting and exercise. Furthermore, in recent years, research on calorie restriction and its potential impact on extending healthy lifespans, as well as studies on ketone bodies, have gradually led to a reevaluation of the significance of ketone bodies in promoting longevity. Thus, in this review, we discuss the emerging and hidden roles of ketone bodies in various organs, including the heart, kidneys, skeletal muscles, and brain, as well as their potential impact on malignancies and lifespan.journal articl
Increased expression of CD38 on endothelial cells in SARS-CoV-2 infection in cynomolgus macaques
Get PDFSARS-CoV-2 infection causes activation of endothelial cells (ECs), leading to dysmorphology and dysfunction. To study the pathogenesis of endotheliopathy, the activation of ECs in lungs of cynomolgus macaques after SARS-CoV-2 infection and changes in nicotinamide adenine dinucleotide (NAD) metabolism in ECs were investigated, with a focus on the CD38 molecule, which degrades NAD in inflammatory responses after SARS-CoV-2 infection. Activation of ECs was seen from day 3 after SARS-CoV-2 infection in macaques, with increases of intravascular fibrin and NAD metabolism-associated enzymes including CD38. In vitro, upregulation of CD38 mRNA in human ECs was detected after interleukin 6 (IL-6) trans-signaling induction, which was increased in the infection. In the presence of IL-6 trans-signaling stimulation, however, CD38 mRNA silencing induced significant IL-6 mRNA upregulation in ECs and promoted EC apoptosis after stimulation. These results suggest that upregulation of CD38 in patients with COVID-19 has a protective role against IL-6 trans-signaling stimulation induced by SARS-CoV-2 infection.journal articl
Bone marrow-derived mononuclear cells ameliorate neurological function in chronic cerebral infarction model mice via improvement of cerebral blood flow
Get PDF滋賀医科大学博士（医学）Cytotherapy. 2023 Nov;25(11):1186-1199.令和5年度thesi
Establishment of a novel mouse model of renal artery coiling-based chronic hypoperfusion-related kidney injury
Get PDF滋賀医科大学博士（医学）Biochemistry and biophysics reports. 2023 Dec 15:37:101607.令和5年度thesi
HIV/AIDS knowledge level, awareness of public health centers and related factors: a cross-sectional study among Brazilians in Japan
Get PDF滋賀医科大学博士（医学）BMC Public Health. 2023 Nov 30;23(1):2379.令和5年度thesi
An extensive basal ganglia hemorrhage in a preexisting neonatal asphyxiated lesion after mRNA-based SARS-CoV-2 vaccination : A fatal adult case of cerebral palsy
Get PDFObjective:
Neurological adverse reactions to SARS-CoV-2 vaccines include a wide variety of central nervous system (CNS) disorders; however, the cause-and-effect relationship is unclear. Herein, we present a fatal case of extensive basal ganglia bleeding after mRNA-based SARS-CoV-2 vaccination and discuss the pathophysiological mechanisms of brain hemorrhage.
Case presentation:
A 66-year-old woman with cerebral palsy and a history of neonatal asphyxia suddenly presented with hypothermia and consciousness disturbance one day after the sixth dose of an mRNA-based SARS-CoV-2 vaccine (Moderna). Clinical investigations revealed a normal thrombocyte count, but stage 1 hypertension and mild prolongation of the prothrombin time and activated partial thromboplastin time. Urgent brain computed tomography (CT) revealed extensive left basal ganglia hemorrhage with global brain edema and downward herniation of the brainstem. The region of the large hematoma corresponded to the basal ganglia lesion which had been produced by neonatal asphyxia at birth. Because the neurosurgeons evaluated her state as inoperable, conservative therapy was continued, but the patient died on day 5 after the event.
Conclusion:
We hypothesized that two pathophysiological mechanisms were responsible for the brain hemorrhage in this case: disruption of focal cerebrovascular autoregulation in preexisting neonatal asphyxiated lesions and disturbance of coagulation pathways after mRNA-based SARS-CoV-2 vaccination.journal articl
