1.SIRT1 in Type 2 Diabetes: Mechanisms and Therapeutic Potential.
Munehiro KITADA ; Daisuke KOYA
Diabetes & Metabolism Journal 2013;37(5):315-325
The prevalence of type 2 diabetes mellitus (T2DM) has been increasing worldwide. Therefore, a novel therapeutic strategy by which to prevent T2DM is urgently required. Calorie restriction (CR) can retard the aging processes, and delay the onset of numerous age-related diseases including diabetes. Metabolic CR mimetics may be therefore included as novel therapeutic targets for T2DM. Sirtuin 1 (SIRT1), a NAD+-dependent histone deacetylase that is induced by CR, is closely associated with lifespan elongation under CR. SIRT1 regulates glucose/lipid metabolism through its deacetylase activity on many substrates. SIRT1 in pancreatic beta-cells positively regulates insulin secretion and protects cells from oxidative stress and inflammation, and has positive roles in the metabolic pathway via the modulation in insulin signaling. SIRT1 also regulates adiponectin secretion, inflammation, glucose production, oxidative stress, mitochondrial function, and circadian rhythms. Several SIRT1 activators, including resveratrol have been demonstrated to have beneficial effects on glucose homeostasis and insulin sensitivity in animal models of insulin resistance. Therefore, SIRT1 may be a novel therapeutic target for the prevention of T2DM, implicating with CR. In this review, we summarize current understanding of the biological functions of SIRT1 and discuss its potential as a promising therapeutic target for T2DM.
Adiponectin
;
Aging
;
Caloric Restriction
;
Circadian Rhythm
;
Diabetes Mellitus, Type 2
;
Glucose
;
Histone Deacetylases
;
Homeostasis
;
Inflammation
;
Insulin
;
Insulin Resistance
;
Metabolic Networks and Pathways
;
Models, Animal
;
Oxidative Stress
;
Prevalence
;
Sirtuin 1
;
Stilbenes
2.SIRT1 in Type 2 Diabetes: Mechanisms and Therapeutic Potential.
Munehiro KITADA ; Daisuke KOYA
Diabetes & Metabolism Journal 2013;37(5):315-325
The prevalence of type 2 diabetes mellitus (T2DM) has been increasing worldwide. Therefore, a novel therapeutic strategy by which to prevent T2DM is urgently required. Calorie restriction (CR) can retard the aging processes, and delay the onset of numerous age-related diseases including diabetes. Metabolic CR mimetics may be therefore included as novel therapeutic targets for T2DM. Sirtuin 1 (SIRT1), a NAD+-dependent histone deacetylase that is induced by CR, is closely associated with lifespan elongation under CR. SIRT1 regulates glucose/lipid metabolism through its deacetylase activity on many substrates. SIRT1 in pancreatic beta-cells positively regulates insulin secretion and protects cells from oxidative stress and inflammation, and has positive roles in the metabolic pathway via the modulation in insulin signaling. SIRT1 also regulates adiponectin secretion, inflammation, glucose production, oxidative stress, mitochondrial function, and circadian rhythms. Several SIRT1 activators, including resveratrol have been demonstrated to have beneficial effects on glucose homeostasis and insulin sensitivity in animal models of insulin resistance. Therefore, SIRT1 may be a novel therapeutic target for the prevention of T2DM, implicating with CR. In this review, we summarize current understanding of the biological functions of SIRT1 and discuss its potential as a promising therapeutic target for T2DM.
Adiponectin
;
Aging
;
Caloric Restriction
;
Circadian Rhythm
;
Diabetes Mellitus, Type 2
;
Glucose
;
Histone Deacetylases
;
Homeostasis
;
Inflammation
;
Insulin
;
Insulin Resistance
;
Metabolic Networks and Pathways
;
Models, Animal
;
Oxidative Stress
;
Prevalence
;
Sirtuin 1
;
Stilbenes
3.Emergency Surgical Treatment for Fungal Prosthetic Valve Endocarditis due to Giant Vegetation
Daisuke SAKAMOTO ; Yasuhiro NAGAYOSHI ; Shigeru SAKAMOTO
Japanese Journal of Cardiovascular Surgery 2018;47(4):162-165
A 68-year-old man presented to the emergency department with a high fever of 39.0 degrees Celsius. His past surgical history was significant, including mitral valve replacement and, tricuspid valve annuloplasty in 2012. On echocardiography, multiple vegetation with a maximum diameter of 20 mm was identified on the leaflet of the prosthetic valve. The vegetations were large, multiple, and appeared floating. Moreover, advanced prosthesis valve regurgitation was observed. Candida grablata was detected in the blood culture, suggesting a high probability of PVE due to fungal infection. Emergency surgery was performed to prevent deterioration of his condition. Multiple large vegetations were noted attached to the prosthetic valve, resulting in damage to the valve leaflets and subsequent stenosis. The operation was concluded following removal of the last prosthetic valve and re-enforcement of the MVR. After surgery, antibiotic therapy with amphotericin B liposome was administered. Given that there were no signs of infection, the patient was discharged from the hospital on the 50th day after surgery. Although the vegetation was deemed large with a likelihood of patient deterioration, we believe that the degree of destruction to the leaflets prevented fatality. Existing literature reported cases whereby patients were discharged despite having such large vegetation on the valve. In cases of fungal infective endocarditis (Fungal IE), regardless of whether the valve was natural or prosthetic, the optimal treatment is to combine infected tissue debridement with thorough lesion removal, valve replacement surgery or valve annuloplasty, supplemented with a long-term antifungal agent. We believe this to be an effective treatment, especially if intervention is implemented early.
4.On the Actual Condition of Medicine Education at Junior High School and the Role Required for School Pharmacists
Yukie KANAZAWA ; Yasunari MANO ; Daisuke KANAZAWA ; Katsuyoshi MIZUKAMI
Japanese Journal of Social Pharmacy 2018;37(2):74-80
In order to promote the proper use of medicines, it is important to conduct effective pharmaceutical education and establish a basic knowledge of medicines. We investigated to clarify the current situation and issues of pharmaceutical education. In June 2017, we administered surveys to 1,152 junior high school third graders and 23 health and physical education teachers who taught pharmacy in junior high schools. A total of 1,079 junior high school third graders and 23 health and physical education teachers answered the survey. We found that 6.5% of the students were taking health foods and supplements, and 17.9% always carried medicines. Further, 30.7% of the students regularly checked the effects and side effects of the medicines they took. Moreover, while only 9.0% of the students knew the word “self-medication,” 66.6% had a prescription notebook. Meanwhile, 39.1% of health and physical education teachers were conducting pharmaceutical education classes. Some of them developed their own textbook. All teachers answered that they would like to promote pharmaceutical education. As it was found that junior high school third graders take medicines daily, it is important to develop an educational system that enables them to further improve pharmaceutical education in junior high schools and to acquire correct knowledge. Therefore, it is important that school pharmacists actively participate in pharmaceutical education and promote close cooperation with physical education teachers.
5.On the Actual Condition of Medicine Education at Junior High School and the Role Required for School Pharmacists
Yukie KANAZAWA ; Yasunari MANO ; Daisuke KANAZAWA ; Katsuyoshi MIZUKAMI
Japanese Journal of Social Pharmacy 2018;37(2):74-80
In order to promote the proper use of medicines, it is important to conduct effective pharmaceutical education and establish a basic knowledge of medicines. We investigated to clarify the current situation and issues of pharmaceutical education. In June 2017, we administered surveys to 1,152 junior high school third graders and 23 health and physical education teachers who taught pharmacy in junior high schools. A total of 1,079 junior high school third graders and 23 health and physical education teachers answered the survey. We found that 6.5% of the students were taking health foods and supplements, and 17.9% always carried medicines. Further, 30.7% of the students regularly checked the effects and side effects of the medicines they took. Moreover, while only 9.0% of the students knew the word “self-medication,” 66.6% had a prescription notebook. Meanwhile, 39.1% of health and physical education teachers were conducting pharmaceutical education classes. Some of them developed their own textbook. All teachers answered that they would like to promote pharmaceutical education. As it was found that junior high school third graders take medicines daily, it is important to develop an educational system that enables them to further improve pharmaceutical education in junior high schools and to acquire correct knowledge. Therefore, it is important that school pharmacists actively participate in pharmaceutical education and promote close cooperation with physical education teachers.
6.The association between overweight and prevalence of food allergy in Japanese children: a cross-sectional study.
Koichiro HAYASHI ; Hiromasa TSUJIGUCHI ; Daisuke HORI ; Yohei YAMADA ; Yukari SHIMIZU ; Thao Thi Thu NGUYEN ; Yuri HIBINO ; Yasuhiro KAMBAYASHI ; Akinori HARA ; Hiroyuki NAKAMURA
Environmental Health and Preventive Medicine 2021;26(1):44-44
BACKGROUND:
Food allergy (FA) is a common disease in children, and its prevalence has increased in developed countries. The impact of overweight on children health also becomes an important social problem. However, the relationship between overweight and FA is still unclear. We examined the association between overweight and the prevalence of FA among Japanese children.
METHODS:
We analyzed data obtained using a self-administered questionnaire from 1772 Japanese children. Weight groups according to body mass index cutoff points proposed by the International Obesity Task Force were used to create two groups: overweight and non-overweight. Children were separated into four age groups (3-6 years, 6-9 years, 9-12 years, and 12-15 years) to examine age differences. We performed univariate and multivariate logistic models to examine the association between overweight and FA.
RESULTS:
The prevalence of FA was significantly higher in boys (10.6%, p = 0.014) than girls (4.5%) and girls (7.9%, p = 0.012) than boys (2.5%) for 6-9 and 12-15 age groups, respectively. While the prevalence of FA was significantly higher in overweight than non-overweight girls (26.1%, p = 0.005) in the 12-15 age group, no significant difference was found in boys. In girls, overweight was significantly associated with FA after adjustment for age and asthma (odds ratio 1.99, 95% confidence interval 1.01-3.89, p = 0.046).
CONCLUSIONS
Our results showed that being overweight was significantly associated with a higher prevalence of FA in girls, but not in boys. Further prospective studies are necessary to find the causal relationship between overweight and FA.
Adolescent
;
Body Mass Index
;
Child
;
Child, Preschool
;
Cross-Sectional Studies
;
Female
;
Food Hypersensitivity/epidemiology*
;
Humans
;
Japan/epidemiology*
;
Male
;
Overweight/epidemiology*
;
Prevalence
;
Sex Factors
7.Relationship between screen time and nutrient intake in Japanese children and adolescents: a cross-sectional observational study.
Hiromasa TSUJIGUCHI ; Daisuke HORI ; Yasuhiro KAMBAYASHI ; Toshio HAMAGISHI ; Hiroki ASAKURA ; Junko MITOMA ; Masami KITAOKA ; Enoch Olando ANYENDA ; Thao Thi Thu NGUYEN ; Yohei YAMADA ; Koichiro HAYASHI ; Tadashi KONOSHITA ; Takiko SAGARA ; Aki SHIBATA ; Satoshi SASAKI ; Hiroyuki NAKAMURA
Environmental Health and Preventive Medicine 2018;23(1):34-34
BACKGROUND:
Sedentary behaviors have recently become an important public health issue. We aimed to investigate the relationship between screen time and nutrient intake in children and adolescents.
METHODS:
The present study was conducted in 2013. Data were collected from children and adolescents aged between 6 and 15 years old in Shika town. Questionnaires were distributed to 1459 subjects, 1414 of whom participated in the study (96.9%). Sedentary behaviors were assessed based on participants' screen behaviors (television (TV) viewing, personal computer (PC) use, and mobile phone (MP) use). The main outcomes were the intake of nutrients from a validated food frequency questionnaire. Analysis of covariance (ANCOVA) was used to examine the significance of differences in nutrient intake estimates. Multivariate linear regression analyses, adjusting for age, BMI, and physical activity, were used to provide parameter estimates (β) and 95% CI for the relationship between screen time and nutrient intake.
RESULTS:
In boys, longer TV viewing times correlated or tended to correlate with a lower intake of protein, potassium, calcium, iron, vitamin K, vitamin B-2, and total dietary fiber. In girls, longer TV viewing times correlated with a lower intake of protein, sodium, calcium, vitamin D, and vitamin B-2. Longer TV viewing times correlated with a higher intake of n-6 fatty acids in girls. PC use was related or tended to be related to a lower intake of potassium, iron, vitamin K, and folic acid in boys, but not in girls. A relationship was observed between MP use and a lower intake of vitamin K in boys, and MP use and a higher intake of vitamin D in girls.
CONCLUSIONS
The present results revealed that longer TV viewing times are associated with less protein, minerals, vitamins, and total dietary fiber intake in children and adolescents. It was also revealed that boys with PC use have less minerals and vitamins. These results support the need to design intervention programs that focus on decreasing TV viewing time in both sexes and PC use in boys while encouraging adherence to dietary guidelines among children and adolescents.
Adolescent
;
Body Mass Index
;
Child
;
Cross-Sectional Studies
;
Diet
;
Energy Intake
;
Exercise
;
Female
;
Humans
;
Japan
;
Male
;
Screen Time
;
Sedentary Behavior
;
Sex Factors
;
Socioeconomic Factors
8.Effect on Undergraduate Medical Students of Exposure to a Summer Camp for Children with Asthma.
Shigemi YOSHIHARA ; Toshio ABE ; Yumi YAMADA ; Makoto WATANABE ; Mika ONO ; Mariko OYAMA ; Sanae KANAZAWA ; Michio NUMATA ; Kiyoshi NISHIKURA ; Daisuke NAKAJIMA ; Megumi HOSHI ; Norimasa FUKUDA ; Tamotsu ANDO ; Noriko KANNO ; Osamu ARISAKA ; Mitsuoki EGUCHI
Medical Education 2001;32(1):39-45
We investigated the effects on medical education of early exposure of undergraduate students to a summer camp for children with asthma. An objective evaluation by the editorial staff found final improvements in the following areas (in descending order of frequency): learning of basic medical behavior (91% of students); cooperative attitude of medical staff in general treatment with the patient and the patient's family (88%); understanding of childhood growth and development (80%); knowledge of childhood asthma (69%); and mastery of basic techniques for therapy and examination (41%). The differences in the ratio of improvement (%) before and after visiting the camp, were (in descending order of frequency): cooperative attitude of medical care staff in general medical treatment with the patient and the patient's family (47%); understanding of childhood growth and development (45%); knowledge of childhood asthma (38%); learning of basic medical manner (34%); and mastery of basic techniques for therapy and examination (25%). These findings suggest that a summer camp is useful for exposing undergraduate medical students to children with asthma and is effective for helping them understand patients and family-oriented pediatric medicine.