Identifying Glucose Metabolism Status in Nondiabetic Japanese Adults Using Machine Learning Model with Simple Questionnaire.

We aimed to identify the glucose metabolism statuses of nondiabetic Japanese adults using a machine learning model with a questionnaire. In this cross-sectional study, Japanese adults (aged 20-64 years) from Tokyo and surrounding areas were recruited. Participants underwent an oral glucose tolerance test (OGTT) and completed a questionnaire regarding lifestyle and physical characteristics. They were classified into four glycometabolic categories based on the OGTT results: category 1: best glucose metabolism, category 2: low insulin sensitivity, category 3: low insulin secretion, and category 4: combined characteristics of categories 2 and 3. A total of 977 individuals were included; the ratios of participants in categories 1, 2, 3, and 4 were 46%, 21%, 14%, and 19%, respectively. Machine learning models (decision tree, support vector machine, random forest, and XGBoost) were developed for identifying the glycometabolic category using questionnaire responses. Then, the top 10 most important variables in the random forest model were selected, and another random forest model was developed using these variables. Its areas under the receiver operating characteristic curve (AUCs) to classify category 1 and the others, category 2 and the others, category 3 and the others, and category 4 and the others were 0.68 (95% confidence intervals: 0.62-0.75), 0.66 (0.58-0.73), 0.61 (0.51-0.70), and 0.70 (0.62-0.77). For external validation of the model, the same dataset of 452 Japanese adults in Hokkaido was obtained. The AUCs to classify categories 1, 2, 3, and 4 and the others were 0.66 (0.61-0.71), 0.57 (0.51-0.62), 0.60 (0.50-0.69), and 0.64 (0.57-0.71). In conclusion, our model could identify the glucose metabolism status using only 10 factors of lifestyle and physical characteristics. This model may help the larger general population without diabetes to understand their glucose metabolism status and encourage lifestyle improvement to prevent diabetes.

Carnosic Acid and Carnosol Activate AMPK, Suppress Expressions of Gluconeogenic and Lipogenic Genes, and Inhibit Proliferation of HepG2 Cells.

Carnosic acid (CA), carnosol (CL) and rosmarinic acid (RA), components of the herb rosemary, reportedly exert favorable metabolic actions. This study showed that both CA and CL, but not RA, induce significant phosphorylation of AMP-dependent kinase (AMPK) and its downstream acetyl-CoA carboxylase 1 (ACC1) in HepG2 hepatoma cells. Glucose-6-phosphatase (G6PC) and phosphoenolpyruvate carboxykinase 1 (PCK1), rate-limiting enzymes of hepatic gluconeogenesis, are upregulated by forskolin stimulation, and this upregulation was suppressed when incubated with CA or CL. Similarly, a forskolin-induced increase in CRE transcriptional activity involved in G6PC and PCK1 regulations was also stymied when incubated with CA or CL. In addition, mRNA levels of ACC1, fatty acid synthase (FAS) and sterol regulatory element-binding protein 1c (SREBP-1c) were significantly reduced when incubated with CA or CL. Finally, it was shown that CA and CL suppressed cell proliferation and reduced cell viability, possibly as a result of AMPK activation. These findings raise the possibility that CA and CL exert a protective effect against diabetes and fatty liver disease, as well as subsequent cases of hepatoma.

Isoxanthohumol, a hop-derived flavonoid, alters the metabolomics profile of mouse feces.

The aim of this study was to verify the effect of treatment with isoxanthohumol (IX) on the metabolomics profile of mouse feces to explore the host-intestinal bacterial interactions at the molecular level. The fecal contents of several amino acids in the high-fat diet (HFD) + 0.1% IX group (treated with IX mixed in diets for 12 weeks) were significantly lower than in the HFD group. The fecal contents of the secondary bile acid deoxycholic acid (DCA) in the HFD + 180 mg/kg IX group (orally treated with IX for 8 weeks) were significantly lower than in the HFD group; the values in the HFD group were higher than those in the normal diet (ND) group. Administration of IX changed the fecal metabolomics profile. For some metabolites, IX normalized HFD-induced fluctuations.

Anti-obesity effect of a hop-derived prenylflavonoid isoxanthohumol in a high-fat diet-induced obese mouse model.

We examined whether oral administration of a hop-derived prenylflavonoid isoxanthohumol (IX) would show anti-obesity activity and the underlying mechanism of the potential activity using a high-fat diet (HFD)-induced obese mouse model. Oral administration of 180 mg/kg IX for 8 weeks suppressed HFD-induced accumulation of visceral fat and body weight gain in mice. Simultaneously, IX changed the composition of the microbiome, as determined by a significant increase in the relative abundances of Akkermansia muciniphila, Blautia, and Escherichia coli. A. muciniphila accounted for 23% and 24% of the total microbiome in the HFD+60 mg/kg and 180 mg/kg IX groups, respectively, while it was undetectable in the normal diet (ND) and HFD groups. Similarly, Blautia accounted for 8% and 10% of the total microbiome in the HFD+60 mg/kg and 180 mg/kg IX groups, respectively, while it accounted for less than 1% in the ND and HFD groups. In contrast, a significant decrease in the relative abundance of Oscillospira was observed in the HFD+60 mg/kg and 180 mg/kg IX groups compared with the HFD group. We further examined the anti-obesity effect of IX using a germ-free (GF) mouse model to clarify the relationship between the microbiome and the effect of IX. IX showed no significant anti-obesity effect on fat accumulation and weight gain in GF mice. These results suggest that the anti-obesity effect of IX may involve microbial changes.

Long-Term Oral Administration of LLHK, LHK, and HK Alters Gene Expression Profile and Restores Age-Dependent Atrophy and Dysfunction of Rat Salivary Glands.

Xerostomia, also known as dry mouth, is caused by a reduction in salivary secretion and by changes in the composition of saliva associated with the malfunction of salivary glands. Xerostomia decreases quality of life. In the present study, we investigated the effects of peptides derived from ß-lactoglobulin C on age-dependent atrophy, gene expression profiles, and the dysfunction of salivary glands. Long-term oral administration of Leu57-Leu58-His59-Lys60 (LLHK), Leu58-His59-Lys60 (LHK) and His59-Lys60 (HK) peptides induced salivary secretion and prevented and/or reversed the age-dependent atrophy of salivary glands in older rats. The transcripts of 78 genes were upregulated and those of 81 genes were downregulated by more than 2.0-fold (p ≤ 0.05) after LHK treatment. LHK upregulated major salivary protein genes such as proline-rich proteins (Prpmp5, Prb3, Prp2, Prb1, Prp15), cystatins (Cst5, Cyss, Vegp2), amylases (Amy1a, Amy2a3), and lysozyme (Lyzl1), suggesting that LLHK, LHK, and HK restored normal salivary function. The AP-2 transcription factor gene (Tcfap2b) was also induced significantly by LHK treatment. These results suggest that LLHK, LHK, and HK-administration may prevent and/or reverse the age-dependent atrophy and functional decline of salivary glands by affecting gene expression.

Brief internet-based cognitive behavior therapy program with a supplement drink improved anxiety and somatic symptoms in Japanese workers.

BACKGROUND: Self-help cognitive behavior therapy (CBT) is a useful approach for the treatment of psychological problems. Recent research on the effectiveness of self-help internet-based CBT (ICBT) indicates that the paradigm moderately improves psychological problems. Furthermore, previous studies have shown that food and drinks containing supplements improve various health conditions. We investigated the effect of a brief self-help ICBT administered with a supplement drink on psychological well-being and somatic symptoms. METHODS: In total, 101 healthy workers were enrolled in the 4-week ICBT program, which consisted of psychoeducation on stress management, behavior activation, and cognitive restructuring. The supplement soft drink was taken every day during the program. The participants were instructed to watch on-demand video clips and read the self-help guidebook and supporting comic strip weekly on the Internet or smartphone. The Japanese version of the Profile of Mood States (POMS) was administered before and after completion of the program. Scores on the POMS tension-anxiety (POMS-TA), depression (POMS-D), and fatigue (POMS-F) subscales were used to assess the effect of the program. Somatic symptoms were assessed using the Brief Job Stress Questionnaire. RESULTS: In total, 75 participants continued the program for 4 weeks; however, of those, 27 failed to complete all weekly tasks or meet the post-assessment deadlines. Therefore, the data of 48 participants were included in the analysis. Pre-post intervention comparisons using paired t-tests revealed significant improvement on the POMS-TA, but not the POMS-D or POMS-F subscales. Moreover, participants reported a significant reduction in the severity of low back pain. CONCLUSION: Our brief intervention moderately improved anxiety levels and the symptom of low back pain. These findings suggest that the brief ICBT program is effective in non-patient populations. Future directions for brief ICBT are discussed. TRIAL REGISTRATION: This study was registered on February 10, 2016 at UMIN. The registration number is UMIN000020962.

The effect for Japanese workers of a self-help computerized cognitive behaviour therapy program with a supplement soft drink.

BACKGROUND: Computerized cognitive behaviour therapy (CCBT) programs can provide a useful self-help approach to the treatment of psychological problems. Previous studies have shown that CCBT has moderate effects on depression, insomnia, and anxiety. The present study investigated whether a supplement drink that includes L-carnosine enhances the effect of CCBT on psychological well-being. METHODS: Eighty-seven participants were randomly allocated to a control group, CCBT, or CCBT with supplement drink. The CCBT and CCBT with supplement drink groups received six weekly self-help CCBT program instalments, which consisted of psycho-education about stress management and coping, behaviour activation, and cognitive restructuring. The CCBT group consumed a bottle of the supplement soft drink every morning through the 6 weeks. This program was delivered by an e-learning system on demand and also included a self-help guidebook. Seventy-two participants completed the program or were assess at the end of the study. RESULTS: ANOVA revealed that there were significant interactions (times × groups) for POMS tension-anxiety and fatigue. The CCBT group showed significantly improved tension-anxiety scores, whereas the CCBT with drink group showed significant improvements on fatigue. CONCLUSION: The self-help CCBT program reduced the subjective experience of tension-anxiety in this group of workers. The addition of a supplement drink enhanced the effect of CCBT on fatigue, providing one possible approach to enhancement of such programs. TRIAL REGISTRATION: This study was registered on September 2, 2016 at UMIN. The registration number is UMIN000023903.

Anti-stress effect of the Lactobacillus pentosus strain S-PT84 in mice.

We investigated if the orally administered Lactobacillus pentosus strain S-PT84 (S-PT84) might show anti-stress activity and ameliorate stress-induced immune suppression in mice. Stress of mice induced an increase in serum corticosterone and a decrease in splenic natural killer activity and in the number of splenocytes versus control mice. However, these changes were not observed in stressed mice that had been administered S-PT84. Furthermore, interleukin (IL)-12 and IL-10 production, which was downregulated in lipopolysaccharide-activated macrophages from stressed mice, was maintained at control levels in the macrophages of stressed mice that had been fed S-PT84. Interferon-γ production, which was downregulated in concanavalin A-activated splenocytes from stressed mice, tended to be maintained at control levels in stressed mice that had been fed S-PT84, although IL-4 production by these cells was not influenced by S-PT84 administration. Additionally, reduced glutathione (GSH) levels were decreased in serum and peritoneal macrophages from stressed mice versus controls, but these GSH levels were significantly higher in stressed animals that had been administered S-PT84 compared with those that had not. These results suggest that S-PT84 exerts anti-stress activity through immune modulation and/or antioxidative activity.

Clinicopathological Significance of Leucine-Rich α2-Glycoprotein-1 in Sera of Patients With Pancreatic Cancer.

OBJECTIVES: Leucine-rich α2-glycoprotein-1 (LRG-1) is an inflammatory protein. Serum LRG-1 levels can reportedly be used as a cancer biomarker for several types of carcinoma. In the present study, we investigated the clinical usefulness of serum LRG-1 levels as a biomarker of pancreatic cancer. METHODS: A total of 124 patients with pancreatic cancer, 35 patients with chronic pancreatitis (CP), and 144 healthy volunteers were enrolled in the study. Serum LRG-1 levels were assayed by enzyme-linked immunosorbent assay. Immunohistochemistry was used to examine LRG-1 expression in pancreatic cancer tissues. RESULTS: Serum LRG-1 levels were significantly increased in patients with pancreatic cancer compared with CP patients and healthy volunteers. The LRG-1 levels increased with progressive clinical stages of pancreatic cancer. Receiver operator curve analysis showed that a combination of carbohydrate antigen 19-9 and LRG-1 resulted in a higher area under the curve for the diagnosis of pancreatic cancer. Positive staining was observed in all cases of pancreatic cancer, but positive signal was scarcely detected in tissues from CP patients or normal surrounding tissue. CONCLUSIONS: These results suggest that serum LRG-1 is a promising biomarker for pancreatic cancer.

Pancreatic cancer immunotherapy using a tumor lysate vaccine, engineered to express α-gal epitopes, targets pancreatic cancer stem cells.

Pancreatic cancer is a lethal disease that remains one of the most resistant to traditional therapies. Immunotherapy in pancreatic cancer induces the recruitment and activation of T cells that recognize tumor-associated antigens (TAAs); thus, the mechanism differs from that of chemotherapy and radiotherapy. The goal of cancer immunotherapy is to elicit immune responses against autologous tumors, and especially to induce multiple T cell clones against a variety of TAAs. In the present study, we prepared a polyvalent tumor lysate vaccine engineered to express the α-gal epitopes, Galα1-3Galß1-4 GlcNAc-R (i.e., α-gal tumor lysate), from primary tumors. The vaccine elicited strong antibody production against multiple TAAs in pancreatic cancer cells and induced activation of multiple tumor-specific T cells in α1,3-galactosyltransferase (α1,3GT) knockout (KO) mice. The tumor lysate vaccine exhibited a similar effect on pancreatic cancer stem cells (CSCs) with the CD44+CD24+ phenotype. Furthermore, in vivo experiments using NOD/SCID mice, inoculated with splenocytes from KO mice vaccinated with the α-gal tumor lysate and injected with pancreatic cancer cells, showed successful induction of a marked immune response that resulted in suppression of tumorigenesis and significant improvement in overall survival. In contrast, inoculation of lymphocytes from KO mice vaccinated with control tumor lysate vaccine had no effects on tumor growth and survival. The results of both in vitro and in vivo experiments emphasize the efficiency of tumor lysate vaccines expressing α-gal epitopes in targeting all pancreatic cancer cells, including differentiated cancer cells and pancreatic CSCs. The α-gal tumor lysate vaccine could be the basis for a novel therapeutic approach in human clinical trials.

Pancreatic fatty degeneration and fibrosis as predisposing factors for the development of pancreatic ductal adenocarcinoma.

OBJECTIVES: Knowledge of risk factors for development of pancreatic ductal adenocarcinoma (PDAC) is limited. To clarify the background condition of the pancreas for the development of PDAC, we analyzed pancreatic histological changes in noncancerous lesion specimens after pancreatectomy in PDAC patients. METHODS: Seventy-six patients with PDAC were enrolled in this study. The PDAC was in the pancreatic head in 37 patients, in the body in 31, and in the tail in 8. No patients had a history of clinical chronic pancreatitis. As controls, 98 patients without PDAC were enrolled. The following parameters were examined: fibrosis, fatty degeneration, and inflammatory cell infiltration. More than 5% of fatty degeneration in the specimen, more than 10% of fibrosis, and more than 5% of inflammatory cell infiltration were considered positive changes. RESULTS: Pancreatectomy specimens showed a higher ratio of positive change in fibrosis (86% vs 42%), fatty degeneration (72% vs 44%), and inflammatory cell infiltration (14% vs 3%) than control samples. Multivariate analyses demonstrated that each histological change was a significant, independent determinant for PDAC. CONCLUSIONS: Our study demonstrated that cryptogenic pancreatic inflammation with fatty changes represents an important predisposing factor for PDAC. Screening for subclinical chronic pancreatitis in healthy populations may enable the detection of PDAC at an early stage.

Drinkable preparation of Theracurmin exhibits high absorption efficiency--a single-dose, double-blind, 4-way crossover study.

Curcumin has various biological activities including antioxidant and antiinflammatory actions, and alcohol detoxification. However, because of its poor absorption efficiency, it is difficult for orally administered curcumin to reach blood levels sufficient to realize its bioactivities. We have generated capsules and tablets containing Theracurmin, a highly absorptive curcumin. In addition, we recently created a drinkable preparation of Theracurmin. To evaluate the absorption efficiency of this type of curcumin, we performed a single-dose, double-blind, 4-way crossover study. We compared plasma curcumin levels after the administration of Theracurmin beverage and 3 other drinkable types of curcumin sold in Japan. Twenty-four healthy subjects (male/female=13/11, age: 23-32) were administered with these 4 drinkable preparations of curcumin. The area under the blood concentration-time curve at 0-8 h was found to be 1.5 to 4.0-fold higher with Theracurmin than with the other 3 kinds of curcumin beverage. Moreover, maximal plasma curcumin concentrations (0-8 h) of Theracurmin were 1.8 to 3.8 times higher than those of the other 3 curcumin beverages. These data indicate that our newly prepared Theracurmin beverage exhibits a much better absorption efficiency than other kinds of curcumin beverage sold in Japan.

Effects of the antlered form of Ganoderma lucidum on tumor growth and metastasis in cyclophosphamide-treated mice.

We examined the alleviation of cyclophosphamide-induced immunodepression by the antlered form of Ganoderma lucidum (G. lucidum AF) and also evaluated the anti-tumor and anti-metastatic effects of G. lucidum AF in cyclophosphamide-treated mice. G. lucidum AF alleviated cyclophosphamide-induced decrease in body weight, natural killer (NK) activity, interferon (IFN)-gamma production, and cytotoxic T lymphocyte (CTL) activity, and inhibited the abnormal increase and decrease in interleukine (IL)-4 level due to cyclophosphamide administration. Post-treatment with cyclophosphamide and G. lucidum AF significantly inhibited tumor growth in MM 46-bearing mice. When Lewis lung carcinoma cells were injected into mice after a cyclophosphamide administration, metastasis of these cells to the lung was increased, but G. lucidum AF suppressed it. The anti-tumor and anti-metastatic effects of the combination of G. lucidum AF and cyclophosphamide might influence the modulatory effects of G. lucidum AF on both cellular and humoral immunity. These findings suggest that G. lucidum AF would be beneficial in alleviating the reduction of immune response by chemotherapeutic anti-cancer drugs.

Antiallergic effects of Lactobacillus pentosus strain S-PT84 mediated by modulation of Th1/Th2 immunobalance and induction of IL-10 production.

BACKGROUND: Many types of fermented food are consumed in Japan. Although some are produced by plant-origin lactic-acid bacteria (LAB) fermentation, the physiological functions of such bacteria remain unclear. We therefore isolated LAB of plant origin from Kyoto pickles and determined the immunological activity of heat-killed preparations of plant-origin LAB. METHODS: The Lactobacillus pentosus strain S-PT84 was selected from among 16 LAB of plant origin as the strongest interleukin (IL)-12-inducing strain. IL-12- and IL-10-inducing activities were determined with macrophages from BALB/c mice. The in vivo immunomodulating effect of S-PT84was determined with BALB/c mice fed S-PT84. The antiallergic activity of S-PT84 was examined in ovalbumin (OVA)/alum-administered BALB/c mice. RESULTS: The L. pentosus strain S-PT84 induced production of both IL-12 and IL-10 in vitro. S-PT84 enhanced splenic natural-killer activity and modulated the T helper (Th) type 1/type 2 balance toward a Th1-dominant state. In the OVA-induced allergy model, orally administered S-PT84 lowered serum IgE levels and suppressed active cutaneous anaphylaxis reaction and splenic IL-4 production. IL-10 production from splenocytes of OVA-immunized mice was upregulated by feeding S-PT84. CONCLUSIONS: Despite heat-killing, S-PT84 exhibited antiallergic effects by modulating the Th1/Th2 balance and inducing regulatory T cells. The L. pentosus strain S-PT84, which is of plant origin and isolated from a traditional Japanese food, is expected to be useful for treatment of many immune diseases including allergies, tumors, infectious diseases and auto-immune diseases.

Anti-tumor activities of the antlered form of Ganoderma lucidum in allogeneic and syngeneic tumor-bearing mice.

We investigated the anti-tumor effects of a dry powder preparation of the antlered form of Ganoderma lucidum (G. lucidum AF, rokkaku-reishi in Japanese), a variant type of G. lucidum, not only in allogeneic Sarcoma 180-bearing ddY mice, but also in syngeneic MM 46-bearing C3H/He mice. G. lucidum AF inhibited tumor growth and elongated the life span when orally administered to mice by free-feeding of a 2.5% G. lucidum AF-containing diet. It also showed anti-tumor activity in spite of post-feeding after tumor inoculation. G. lucidum AF significantly countered the depression of splenic CD8+ cells and protected the decrease in interferon-gamma (IFN-gamma) production in regional lymph nodes of MM 46-bearing mice, indicating that the anti-tumor activity of G. lucidum AF might be caused by its immunostimulating action. These results suggest that the ingestion of G. lucidum AF can be useful for the prevention and curing of cancer.

[Soothing effect of Ganoderma lucidum antlered form on cyclophosphamide-induced adverse reaction].

The immunological functions of Ganoderma lucidum antlered form (AF) (Rokkaku-Reishi in Japanese), a variant type of Ganoderma lucidum, were investigated in C57BL/6 mice treated with cyclophosphamide (CY). Ganoderma lucidum AF alleviated CY-induced decrease in body weight and abnormal increase in blood neutrophil level, when the mice were fed a diet containing 2.5% Ganoderma lucidum AF starting one week before CY treatment (150 mg/kg, ip). The recovery of CD8+ and NK1.1+ cells in the spleen was accelerated in Ganoderma lucidum AF group compared to the control group. Ganoderma lucidum AF also both alleviated CY-induced splenic lymphopenia and suppressed the abnormal increase in splenocytes 7 days after CY treatment. These results suggest that ingestion of Ganoderma lucidum AF is beneficial for improvement of quality of life reduced by anti-cancer chemotherapeutic drugs such as CY.

Lentinan from shiitake mushroom (Lentinus edodes) suppresses expression of cytochrome P450 1A subfamily in the mouse liver.

Induction of xenobiotics metabolizing enzymes is related to the formation and chemoprevention of cancer. Since cytochrome P450s (CYPs) including CYP1A subfamily metabolize certain pro-carcinogens to their ultimate forms, down-regulation of CYP1As by food factors leads to the prevention of cancer. Mushroom polysaccharides, especially beta-glucans such as lentinan from Lentinus edodes, possess the anti-tumor and immunomodulating activities through the cytokine production from immunocytes. Recent our studies have demonstrated that lentinan suppresses hepatic CYP1As expression in the both constitutive and inducible levels through the production of tumor necrosis factor-alpha and an increase in the DNA-binding activity of nuclear factor-kappaB. This paper discusses on the effective lentinan dosage and route of administration for suppression of CYP1As.

Suppressive effect of polysaccharides from the edible and medicinal mushrooms, Lentinus edodes and Agaricus blazei, on the expression of cytochrome P450s in mice.

To investigate the effects of lentinan from Lentinas edodes and polysaccharides from Agaricus blazei (ABPS) on the expression of cytochrome P450s (CYPs), lentinan (10 mg/kg/day) or ABPS (200 mg/kg/day) was administered to female BALB/c mice four times every other day by intraperitoneal injection. Lentinan and ABPS suppressed both the constitutive and 3-methylcholanthrene-induced CYP1A expression and ethoxyresorufin-O-deethylation activity in the liver.

Evoking cytochrome P450 1A activity interferes with apoptosis induced by 3-amino-1,4-dimethyl-5H-pyrido [4,3-b]indole (Trp-P-1) in rat hepatocytes under the ex vivo system.

3-Amino-1,4-dimethyl-5H-pyrido[4,3-b]indole (Trp-P-1) is known as a dietary carcinogen and it requires metabolic activation by cytochrome P450 (CYP) 1A subfamily to have carcinogenicity. On the other hand, our previous report demonstrated that Trp-P-1 induces apoptosis in primary cultured rat hepatocytes, but the metabolically activated Trp-P-1 added extracelluarly to hepatocytes did not induce apoptosis. In this study, we focused on the intracellular status of CYPs and investigated apoptotic events induced by Trp-P-1 using hepatocytes isolated from rats treated with three chemical inducers for CYPs. In cultured hepatocytes from rats treated with 3-methylchoranthrene, which mainly induces CYP 1A, Trp-P-1-induced apoptosis was suppressed. In the same cultures, intact Trp-P-1 was decreased and its metabolites were increased. Phenobarbital and pyridine did not affect Trp-P-1-induced apoptosis. These results suggested that evoking CYP 1A activity might interfere with apoptosis induced by Trp-P-1 in rat hepatocytes under the ex vivo system.