Kyushu University Academic Staff Educational and Research Activities Database
List of Reports
Kazuhiro Nishiyama Last modified date:2021.07.02

Lecturer / - / Department of Pharmaceutical Health Care and Sciences / Faculty of Pharmaceutical Sciences


Reports
1. Nishiyama, K., Fujimoto, Y., Takeuchi, T., Azuma, Y.-T., Aggressive Crosstalk Between Fatty Acids and Inflammation in Macrophages and Their Influence on Metabolic Homeostasis, Neurochemical Research, 10.1007/s11064-017-2269-x, Vol.43, No.1, pp.19-26, 2018.01, From the immunological point of view, macrophages are required to maintain metabolic homeostasis. Recently, there has been an increased focus on the influence of macrophage phenotypes in adipose tissue on the maintenance of metabolic homeostasis in healthy conditions because dysregulated metabolic homeostasis causes metabolic syndrome. This review notes several types of inflammatory and anti-inflammatory mediators in metabolic homeostasis. M1 macrophage polarization mediates inflammation, whereas M2 macrophage polarization mediates anti-inflammation. Fatty acids and their related factors mediate both inflammatory and anti-inflammatory responses. Saturated fatty acids and polyunsaturated fatty acids mediate inflammation, whereas marine-derived n-3 fatty acids, such as eicosapentaenoic acid and docosahexaenoic acid, mediate anti-inflammation. In this review, we discuss the current understanding of the crosstalk between fatty acids and inflammation in macrophages and their influence on metabolic homeostasis..
2. Numaga-Tomita, T., Oda, S., Nishiyama, K., Tanaka, T., Nishimura, A., Nishida, M., TRPC channels in exercise-mimetic therapy, Pflugers Archiv European Journal of Physiology, 10.1007/s00424-018-2211-3, Vol.471, No.3, pp.507-517, 2019.03, Physical exercise yields beneficial effects on all types of muscle cells, which are essential for the maintenance of cardiovascular homeostasis and good blood circulation. Daily moderate exercise increases systemic antioxidative capacity, which can lead to the prevention of the onset and progression of oxidative stress-related diseases. Therefore, exercise is now widely accepted as one of the best therapeutic strategies for the treatment of ischemic (hypoxic) diseases. Canonical transient receptor potential (TRPC) proteins are non-selective cation channels activated by mechanical stress and/or stimulation of phospholipase C-coupled surface receptors. TRPC channels, especially diacylglycerol-activated TRPC channels (TRPC3 and TRPC6; TRPC3/6), play a key role in the development of cardiovascular remodeling. We have recently found that physical interaction between TRPC3 and NADPH oxidase (Nox) 2 under hypoxic stress promotes Nox2-dependent reactive oxygen species (ROS) production and mediates rodent cardiac plasticity, and inhibition of the TRPC3-Nox2 protein complex results in enhancement of myocardial compliance and flexibility similar to that observed in exercise-treated hearts. In this review, we describe current understanding of the roles of TRPC channels in striated muscle (patho)physiology and propose that targeting TRPC-based protein complexes could be a new strategy to imitate exercise therapy..
3. Tanaka, T., Nishimura, A., Nishiyama, K., Goto, T., Numaga-Tomita, T., Nishida, M., Mitochondrial dynamics in exercise physiology, Pflugers Archiv European Journal of Physiology, 10.1007/s00424-019-02258-3, Vol.472, No.2, 2020.01, A growing body of evidence suggests that exercise shows pleiotropic effects on the maintenance of systemic homeostasis through mitochondria. Dysregulation of mitochondrial dynamism is associated with metabolic inflexibility, resulting in many of the metabolic diseases and aging. Studies have suggested that exercise prevents and delays the progression of mitochondrial dysfunction by improving mitochondrial metabolism, biogenesis, and quality control. Exercise modulates functions of mitochondrial dynamics-regulating proteins through post-translational modification mechanisms. In this review, we discuss the putative mechanisms underlying maintenance of mitochondrial homeostasis by exercise, especially focusing on the post-translational modifications of several signaling proteins contributing to mitochondrial biogenesis, autophagy or mitophagy flux, and fission/fusion cycle. We also introduce novel small molecules that can potentially mimic exercise therapy through preserving mitochondrial dynamism. These recent advancements in the field of mitochondrial biology may lead to a greater understanding of exercise signaling..
4. Crosstalk between fatty acids and inflammation in macrophages and their influence on metabolic homeostasis.
5. Mitochondrial quality control and cardiac risk regulation by reactive persulfide species.
6. Is mitochondrial abnormality the cause of heart failure?.
7. Kazuhiro Nishiyama, Tomohiro Tanaka, Akiyuki Nishimura, Motohiro Nishida, TRPC3-based protein signaling complex as a therapeutic target of myocardial atrophy., Current molecular pharmacology, 10.2174/1874467213666200407090121, 2020.04, BACKGROUND: Transient receptor potential (TRP) channels, especially canonical TRP channel subfamily members 3 (TRPC3) and 6 (TRPC6), have attracted attention as a putative therapeutic target of heart | 1 failure. Moreover, TRPC3 and TRPC6 channels are physiologically important for maintaining cellular homeostasis. How TRPC3/C6 channels alter intracellular signaling from adaptation to maladaptation has been discussed for many years. We recently showed that formation of a protein signal complex between TRPC3 and NADPH oxidase (Nox) 2 caused by environmental stresses (e.g., hypoxia, nutritional deficiency, and anticancer drug treatment) promotes Nox2-dependent reactive oxygen species production and cardiac stiffness, including myocardial atrophy and interstitial fibrosis, in rodents. In fact, pharmacological prevention of the TRPC3-Nox2 protein complex can maintain cardiac flexibility in mice after anti-cancer drug treatment. CONCLUSION: In this mini-review, we discuss the relationship between TRPC3/C6 channels and cardiovascular disease, and propose a new therapeutic strategy by focusing on pathology-specific protein- protein interactions..