1.The analysis of the growth velocity curve in height based upon the maturity rate.
KATSUNORI FUJII ; YUTAKA YAMAMOTO
Japanese Journal of Physical Fitness and Sports Medicine 1995;44(4):431-437
A study was conducted to analyze the height growth velocity curve based upon the maturity rate. Ninety-eight longitudinal data points for height (for subjects aged 6 to 17 years) were obtained retrospectively from health examination records in 1983. Growth distance and growth velocity curves of each individual were described by the wavelet interpolation method, and PHV age was determined with the described graph using computer simulation. We classified the growth velocity curve by the maturity rate approximated according to the PHV age. As a result, it was shown that the after-growth spurt in early maturity and somewhat early maturity type appeared more than in the average and somewhat late maturity types, and that conversely, the mid-growth spurt in the late maturity and somewhat late maturity types appeared more than in the early maturity and somewhat early maturity types. Specifically, it was demonstrated that two mid-growth spurts appeared in the late maturity and somewhat late maturity types.
2.The Effect of Human Placental Extracts in Suppressing Tumor Cell and Preventing Normal Cell Damage
Eiichi HIRANO ; Katsunori YAMAMOTO ; Koji TAMADA ; Taiichi KAKU ; Tetsuo MORINAGA
Japanese Journal of Complementary and Alternative Medicine 2015;12(2):65-71
Objectives: To analyze the effect of human placental extracts (HPEx) on hepatocellular carcinoma cells in vitro. Methods: The hepatocellular carcinoma cell lines, namely, HLE and Huh-7, were used. The cells were subjected to a growth assay using the formazan dye method; the effect of combination treatment with sorafenib and HPEx was also assessed. The preventing normal cell damage effect of HPEx was analyzed by virtual therapy where possible; the experimental protocol was constructed on the basis of pre- and post-sorafenib treatment data. Cytotoxicity was measured by lactate dehydrogenase (LDH) assay. Results: HPEx caused significant dose-dependent suppression in the growth of HLE and Huh-7 cells. These tumor cells were significantly suppressed by combination treatment with HPEx and sorafenib. In addition, HPEx potentiated sorafenib sensitivity against tumor cells, and significantly prevented sorafenib-induced cytotoxicity in primary cultured rat hepatocytes under all designed experimental conditions. Specifically, pre-treatment with HPEx had a greater effect than post-treatment with HPEx. Conclusion: HPEx suppresses tumor cell growth, potentiates sorafenib efficacy, and has a preventing normal cell damage effect; this triple functionality of HPEx makes it a useful agent for liver cancer therapy.
3.Multimorbidity of Allergic Diseases Is Associated With Functional Gastrointestinal Disorders in a Young Japanese Population
Yasunori YAMAMOTO ; Shinya FURUKAWA ; Teruki MIYAKE ; Junichi WATANABE ; Yukihiro NAKAMURA ; Yoshihiro TAGUCHI ; Tetsuya YAMAMOTO ; Aki KATO ; Katsunori KUSUMOTO ; Osamu YOSHIDA ; Eiji TAKESHITA ; Yoshio IKEDA ; Naofumi YAMAMOTO ; Yuka SAEKI ; Osamu YAMAGUCHI ; Yoichi HIASA
Journal of Neurogastroenterology and Motility 2024;30(2):229-235
Background/Aims:
Although certain allergic diseases have been reported to be associated with the prevalence of functional dyspepsia (FD) and irritable bowel syndrome (IBS), it is unclear whether the presence of multiple allergic diseases further increases the prevalence of FD and IBS.The aim of this study is to determine this issue in young people.
Methods:
A cohort of 8923 Japanese university students was enrolled and diagnoses of FD and IBS were confirmed using Rome III criteria.Allergic disorders diagnosed at medical institutions were obtained by means of a self-administered questionnaire.
Results:
The prevalence of FD, IBS, and their overlap was found to be 1.9%, 6.5%, and 1.1%, respectively. Pollen allergy was independently positively correlated with FD, IBS, and overlap of FD and IBS. Allergic rhinitis was positively linked to IBS. Drug allergy was positively associated with FD. The presence of multiple allergic diseases was positively correlated with FD and IBS (FD: adjusted OR for 2 allergic diseases: 1.95 [95% CI, 1.24-2.98], P for trend = 0.003; and IBS: adjusted OR for 1 allergic disease: 1.40 [95% CI, 1.15-1.69], 2 allergic diseases 1.47 [95% CI, 1.12-1.91], and 3 or more allergic diseases: 2.22 [95% CI, 1.45-3.28], P for trend = 0.001). Additionally, the concomitant existence of multiple allergic diseases was also demonstrated to have a trend that correlated with the overlap of FD and IBS (P for trend = 0.018).
Conclusion
Allergic disease multimorbidity is positively correlated with the prevalence of FD and IBS in a young population.
4.Double-Orifice Tricuspid Valve Visualized by Three-Dimensional Transthoracic Echocardiography.
Kikuko OBASE ; Karima ADDETIA ; Kazue TAKAHASHI ; Katsunori YAMAMOTO ; Ai KAWAMURA ; Tomoko TAMADA ; Koichiro IMAI ; Shiro UEMURA
Journal of Cardiovascular Ultrasound 2016;24(3):253-255
No abstract available.
Echocardiography*
;
Echocardiography, Three-Dimensional
;
Tricuspid Valve*
5.Association Between Body Mass Index and Functional Dyspepsia in Young Japanese People
Yasunori YAMAMOTO ; Shinya FURUKAWA ; Junichi WATANABE ; Aki KATO ; Katsunori KUSUMOTO ; Eiji TAKESHITA ; Yoshio IKEDA ; Naofumi YAMAMOTO ; Katsuhiko KOHARA ; Yuka SAEKI ; Yoichi HIASA
Journal of Neurogastroenterology and Motility 2022;28(2):276-282
Background/Aims:
Evidence regarding the association between body mass index (BMI) and functional dyspepsia (FD) in the Asian population is limited.Further, no study has evaluated this issue in young people in Asian and Western populations. Thus, we aim to investigate this issueamong young Japanese people.
Methods:
The study subjects comprised of 8923 Japanese university students. BMI was divided into 4 categories (quartiles) on the basis of thestudy subjects’ distribution (lowest, low, moderate, and high [reference]). The definition of lean, normal, overweight, and obesewas BMI < 18.5 kg/m2 , 18.5 ≤ BMI < 25 kg/m2 (reference), 25 kg/m2 ≤ BMI < 30 kg/m2 , and 30 kg/m2 ≤ BMI, respectively. The definition of FD was based on the Rome III criteria.
Results:
The prevalence of FD was 1.9% in this cohort. The lowest BMI was independently associated with FD after adjustment (adjusted odds ratio [OR], 2.88; 95% confidence interval [CI], 1.46-3.67); P for trend = 0.001). The lowest BMI was independently associated with FD in women but not in men (OR, 2.94; 95% CI, 1.59-5.77; P for trend = 0.001). Leanness was independently associated with FD in total and in women but not in men (total: adjusted OR, 2.01; 95% CI, 1.40-2.86) and women (OR, 2.19; 95% CI, 1.35-3.45). However,interaction analysis showed no significant difference for sex.
Conclusions
Among young Japanese people, BMI may be independently inversely associated with FD. Leanness may be an independent associated factor for FD in the young Japanese women.
6.Association Between Eating Behavior, Frequency of Meals, and Functional Dyspepsia in Young Japanese Population
Yasunori YAMAMOTO ; Shinya FURUKAWA ; Junichi WATANABE ; Aki KATO ; Katsunori KUSUMOTO ; Teruki MIYAKE ; Eiji TAKESHITA ; Yoshio IKEDA ; Naofumi YAMAMOTO ; Katsuhiko KOHARA ; Syuichi SAHEKI ; Yuka SAEKI ; Yoichi HIASA
Journal of Neurogastroenterology and Motility 2022;28(3):418-423
Background/Aims:
Functional dyspepsia (FD) may be a common digestive disease worldwide and reduces the quality of life of patients. However, only a few studies have investigated the association between eating behavior and FD. The purpose of this cross-sectional study is to examine the association between eating behavior and prevalence of FD in a young Japanese cohort.
Methods:
In this study, we enrolled 8923 Japanese university students. FD is diagnosed based on the Rome III criteria. Eating habits and frequency of meals were investigated using a self-administered questionnaire.
Results:
The FD subjects had a younger mean age, a lower body mass index, and a lower proportion of men compared to the non-FD subjects.An independent positive association between skipping breakfast and/or lunch and FD was found (adjusted ORs were 1.60 [95% CI, 1.10-2.32] for breakfast and 2.52 [95% CI, 1.04-5.18] for lunch). Skipping dinner, extra meals (snacks) or midnight snacks was not associated with FD. The prevalence of FD in subjects eating 1, 2, and 3 meals per day was 4.8%, 2.2%, and 1.7%, respectively. The frequency of meals was independently inversely associated with prevalence of FD (adjusted ORs were 1 per day: 2.72 [95% CI, 1.19-5.42], and 2 per day: 1.69 [95% CI, 1.16-2.43], P for trend = 0.001).
Conclusions
In the young Japanese people, the frequency of meals may be independently inversely associated with prevalence of FD. In particular, skipping breakfast and/or lunch was associated with the prevalence of FD.