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Furuta C, Jinzu H, Cao L, Drewnowski A, Okabe Y. Nutrient Profiling of Japanese Dishes: The Development of a Novel Ajinomoto Group Nutrient Profiling System. Front Nutr 2022; 9:912148. [PMID: 35967784 PMCID: PMC9372512 DOI: 10.3389/fnut.2022.912148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/16/2022] [Indexed: 11/13/2022] Open
Abstract
Government agencies and private companies have supported the development of nutrient profiling (NP) systems to facilitate the selection of nutrient-dense foods by consumers, promote nutritious food development, and limit excessive advertising of products with low nutritional value. While most NP models were developed to assess individual foods, the Ajinomoto Group Nutrient Profiling System (ANPS) was developed to assess the overall nutritional value of cooked dishes that are culturally specific to Japan. Based on the national dietary recommendations and nutritional surveys, target values were created for 13 dish categories, while considering the combinations of meal units. For the ANPS, the four evaluating elements were protein and vegetables, which should be encouraged, and sodium and saturated fatty acids, which should be limited. The ANPS algorithm for dishes was the sum of the scores of individual elements, with a maximum of 10 points per serving. The sum of scores was then multiplied by 2.5 to convert to the 100-point scale. Convergent validity was tested using the nutrient-rich food index (NRF) score of 6.3. In total, 1,089 popular Japanese dishes were evaluated using the ANPS, and the median score of ANPS was 70.0 points (interquartile range, 55–78.8), and the average score was 67.7 (standard deviation, 16.5) points. Since salt intake is a major health risk in Japan, this tool was designed to evaluate sodium content with high sensitivity, and low-salt dishes significantly improved sodium and ANPS scores compared with regular dishes. The Pearson’s correlation coefficient between the total score of NRF 6.3 and ANPS in 1,089 dishes was r = 0.452 (p < 0.0001). This newly developed ANPS could be used to evaluate culture-specific cooked dishes per serving size. It can determine the nutritional values of dishes, with a high sensitivity to sodium content, a major Japanese nutritional issue. Further research is needed to determine the accuracy and usefulness of the ANPS as a system that would lead to changes in eating behavior nationwide.
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Affiliation(s)
- Chie Furuta
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kawasaki, Japan
| | - Hiroko Jinzu
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kawasaki, Japan
| | - Lili Cao
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kawasaki, Japan
| | - Adam Drewnowski
- Center for Public Health Nutrition, School of Public Health, University of Washington, Seattle, WA, United States
| | - Yuki Okabe
- Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kawasaki, Japan
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Furuta C, Sato W, Murakami H, Suri DJ, Otoo GE, Tano-Debrah K, Ghosh SA. Changes of Plasma Amino Acid Profiles in Infants With a Nutrient-Fortified Complementary Food Supplement: Evidence From a 12-Month Single-Blind Cluster-Randomized Controlled Trial. Front Nutr 2021; 8:606002. [PMID: 34660654 PMCID: PMC8514778 DOI: 10.3389/fnut.2021.606002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 08/09/2021] [Indexed: 11/17/2022] Open
Abstract
Stunting is reportedly associated with low circulating levels of essential amino acids (EAAs). This study examined the effect of a macronutrient- and micronutrient-fortified complementary food supplement (KOKO Plus) on specific plasma EAA levels and stunting in infants aged 6–18 months. In a single-blind cluster-randomized controlled trial conducted in Ghana, infants were enrolled at 6 months and followed until 18 months. Thirty-eight communities were randomly assigned to receive KOKO Plus (KP, fourteen communities, n = 321), multiple-micronutrient powder (MN, thirteen communities, n = 327), or only nutritional education as control group (NE, eleven communities, n = 318), and all groups received nutrition education. Plasma amino acids (AAs) were measured at 6, 12, and 18 months (end point). Mixed-effects models were used to assess the effect of the intervention on plasma AAs, and the relationship between plasma branched-chain AAs (BCAAs) and the risk of stunting was assessed. At the end point, total BCAA concentrations (±standard error) significantly exceeded baseline in the KP (284.2 ± 4.3 μM) and NE (289.1 ± 4.4 μM) groups but not the MN group (264.4 ± 4.1 μM). After adjustment for compliance at 200 sachets, plasma BCAAs exceeded in the KP group (284.5 ± 4.2 μM) compared to the MN group (264.6 ± 4 μM). Plasma BCAAs were positively correlated with changes in length-for-age Z-score from baseline (R = 0.327, p = 0.048). In conclusion, the plasma BCAA concentrations of infants that received KP and the NE group was significantly higher compared to the MN group but there were no differences between the KP and NE group at end point. Improved plasma BCAAs may be due to improved nutrient intake by infants exposed to KP or NE. Low BCAAs were associated with stunting, replicating the previous finding. Clinical Trial Registration:https://clinicaltrials.gov/ct2/show/NCT03181178?term=NCT03181178&draw=2&rank=1, identifier: NCT03181178.
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Affiliation(s)
- Chie Furuta
- Institute of Food Science and Technologies, Ajinomoto Co. Inc., Kawasaki-city, Japan
| | - Wataru Sato
- Research Institute for Bioscience Products and Fine Chemicals, Ajinomoto Co. Inc., Kawasaki-city, Japan
| | - Hitoshi Murakami
- Institute of Food Science and Technologies, Ajinomoto Co. Inc., Kawasaki-city, Japan
| | - Devika J Suri
- Nevin Scrimshaw International Nutrition Foundation, Boston, MA, United States
| | - Gloria E Otoo
- Department of Nutrition and Food Science, University of Ghana, Legon-Accra, Ghana
| | - Kwaku Tano-Debrah
- Department of Nutrition and Food Science, University of Ghana, Legon-Accra, Ghana
| | - Shibani A Ghosh
- Nevin Scrimshaw International Nutrition Foundation, Boston, MA, United States.,Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA, United States
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Sato W, Furuta C, Akomo P, Bahwere P, Collins S, Sadler K, Banda C, Maganga E, Kathumba S, Murakami H. Amino acid-enriched plant-based RUTF treatment was not inferior to peanut-milk RUTF treatment in restoring plasma amino acid levels among patients with oedematous or non-oedematous malnutrition. Sci Rep 2021; 11:12582. [PMID: 34131186 PMCID: PMC8206220 DOI: 10.1038/s41598-021-91807-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 05/31/2021] [Indexed: 01/20/2023] Open
Abstract
Ready-to-use therapeutic food (RUTF) with adequate quality protein is used to treat children with oedematous and non-oedematous severe acute malnutrition (SAM). The plasma amino acid (AA) profile reflects the protein nutritional status; hence, its assessment during SAM treatment is useful in evaluating AA delivery from RUTFs. The objective was to evaluate the plasma AAs during the treatment of oedematous and non-oedematous SAM in community-based management of acute malnutrition (CMAM) using amino acid-enriched plant-based RUTFs with 10% milk (MSMS-RUTF) or without milk (FSMS-RUTF) compared to peanut milk RUTF (PM-RUTF). Plasma AA was measured in a non-blinded, 3-arm, parallel-group, simple randomized controlled trial conducted in Malawi. The RUTFs used for SAM were FSMS-RUTF, MSMS-RUTF or PM-RUTF. A non-inferiority hypothesis was tested to compare plasma AA levels from patients treated with FSMS-RUTF or MSMS-RUTF with those from patients treated with PM-RUTF at discharge. For both types of SAM, FSMS-RUTF and MSMS-RUTF treatments were non-inferior to the PM-RUTF treatment in restoration of the EAA and cystine except that for FSMS-RUTF, methionine and tryptophan partially satisfied the non-inferiority criteria in the oedematous group. Amino-acid-enriched milk-free plant-source-protein RUTF has the potential to restore all the EAA, but it is possible that enrichment with amino acids may require more methionine and tryptophan for oedematous children.
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Affiliation(s)
- Wataru Sato
- Ajinomoto Co. Inc., Research Institute for Bioscience Products & Fine Chemicals, Kawasaki, Japan
| | - Chie Furuta
- Ajinomoto Co. Inc., Institute of Food Science and Technologies, Suzukicho 1-1, Kawasaki-ku, Kawasaki, Kanagawa, 210-8681, Japan
| | | | - Paluku Bahwere
- Valid International, Oxford, UK.,Center for Epidemiology, Biostatistics, and Clinical Research, School of Public Health, Free University of Brussels, Brussels, Belgium
| | - Steve Collins
- Valid Nutrition, Cork, Ireland.,Valid International, Oxford, UK
| | | | | | | | | | - Hitoshi Murakami
- Ajinomoto Co. Inc., Institute of Food Science and Technologies, Suzukicho 1-1, Kawasaki-ku, Kawasaki, Kanagawa, 210-8681, Japan.
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Sato W, Furuta C, Matsunaga K, Bahwere P, Collins S, Sadler K, Akomo P, Banda C, Maganga E, Kathumba S, Murakami H. Amino-acid-enriched cereals ready-to-use therapeutic foods (RUTF) are as effective as milk-based RUTF in recovering essential amino acid during the treatment of severe acute malnutrition in children: An individually randomized control trial in Malawi. PLoS One 2018; 13:e0201686. [PMID: 30096200 PMCID: PMC6086422 DOI: 10.1371/journal.pone.0201686] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/16/2018] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Ready-to-use therapeutic food (RUTF) is used to treat children suffering from severe acute malnutrition (SAM). Standard RUTF uses milk as the primary protein source, which makes the product expensive, and given the high worldwide SAM burden, having a less expensive effective alternative is a public health priority. OBJECTIVE The objective of this study was to evaluate whether newly developed amino acid-enriched milk-free RUTF (FSMS-RUTF) or amino acid-enriched low-milk RUTF (MSMS-RUTF) treatment could replenish plasma amino acids to levels comparable to those following standard peanut-milk RUTF (PM-RUTF) treatment and to improve understanding of the effects of treatment on anthropometric measurements. A secondary analysis was performed to test the noninferiority hypothesis of plasma essential amino acid (EAA) levels. METHODS Plasma EAA levels were measured in a nonblinded, 3-arm, parallel-group simple randomized controlled trial conducted in Malawi to examine the efficacy of FSMS-RUTF, MSMS-RUTF and PM-RUTF in the treatment of SAM in 2 groups of children aged 6-23 and 24-59 months (mo). Sample size calculations were performed based on the previous our study. A noninferiority margin was set at -25% of the PM-RUTF arm at discharge. RESULTS The relative values of the differences (95% CI) in plasma EAA levels between PM-RUTF treatment and FSMS-RUTF and MSMS-RUTF treatments at discharge were -7.9% (-18.6, 2.8) and 9.8% (0.2, 19.5), respectively, in children aged 6-23 mo, while in those aged 24-59 mo, the difference values were 17.8% (1.6, 34.1) and 13.6% (-2.8, 29.9), respectively. CONCLUSION At discharge, the plasma EAA concentrations in 6-59-mo-old SAM children treated with FSMS-RUTF and MSMS-RUTF were not less than those of children treated with PM-RUTF. These findings indicate that treatment with either of the 3 RUTFs was associated with adequate protein synthesis and that all the formulations provided sufficient functional metabolites of plasma amino acids to support nutritional recovery from SAM.
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Affiliation(s)
- Wataru Sato
- Institute for Innovation, Ajinomoto Co., Inc. Tokyo, Japan
| | - Chie Furuta
- Institute for Innovation, Ajinomoto Co., Inc. Tokyo, Japan
| | | | - Paluku Bahwere
- Valid International, Oxford, United Kingdom.,Center for Epidemiology, Biostatistics, and Clinical Research, School of Public Health, Free University of Brussels, Brussels, Belgium
| | - Steve Collins
- Valid International, Oxford, United Kingdom.,Valid Nutrition, Cork, Republic of Ireland
| | | | | | - Chrissy Banda
- Valid International, Oxford, United Kingdom.,Valid Nutrition, Cork, Republic of Ireland
| | | | | | - Hitoshi Murakami
- Nutrition Improvement Department, Ajinomoto Co. Inc., Tokyo, Japan
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Abstract
BACKGROUNDS/AIMS This study was aimed at understanding the relationship between plasma amino acids and protein malnutrition and at determining whether amino acid supplementation associated with malnutrition and growth improves linear growth in growing rats. METHODS Body length and plasma amino acids were measured in young male rats that were fed the following diet for 3 weeks, mimicking a low and imbalanced protein diets based on maize, a major staple consumed in developing countries: a 70% calorically restricted cornmeal-based diet (C), C + micronutrients (CM), CM + casein (CMC), CM + soy protein (CMS) or CMS + 0.3% lysine. RESULTS A correlation analysis of linear growth and plasma amino acids indicated that lysine, tryptophan, branched-chain amino acids, methionine, and phenylalanine significantly correlated with body length. Supplementation with these 5 amino acids (AA1) significantly improved the body length in rats compared to CMC treatment whereas, nitrogen-balanced amino acid supplemented controls (AA2) did not (CM +1.2 ± 0.2, CMC +2.7 ± 0.3, CMS +2.1 ± 0.3, AA1 +2.8 ± 0.2, and AA2 +2.5 ± 0.3 cm). CONCLUSION With securing proper amino acid balance, supplementing growth-related amino acids is more effective in improving linear growth in malnourished growing male rats. Analysis of the correlation between plasma amino acids and growth represents a powerful tool to determine candidate amino acids for supplementation to prevent malnutrition. This technology is adaptable to children in developing countries.
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Nogusa Y, Mizugaki A, Hirabayashi-Osada Y, Furuta C, Ohyama K, Suzuki K, Kobayashi H. Combined supplementation of carbohydrate, alanine, and proline is effective in maintaining blood glucose and increasing endurance performance during long-term exercise in mice. J Nutr Sci Vitaminol (Tokyo) 2015; 60:188-93. [PMID: 25078375 DOI: 10.3177/jnsv.60.188] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Carbohydrate supplementation is extremely important during prolonged exercise because it maintains blood glucose levels during later stages of exercise. In this study, we examined whether maintaining blood glucose levels by carbohydrate supplementation could be enhanced during long-term exercise by combining this supplementation with alanine and proline, which are gluconeogenic amino acids, and whether such a combination would affect exercise endurance performance. Male C57BL/6J mice were orally administered either maltodextrin (1.25 g/kg) or maltodextrin (1.0 g/kg) with alanine (0.225 g/kg) and proline (0.025 g/kg) 15 min before running for 170 min. Combined supplementation of maltodextrin, alanine, and proline induced higher blood glucose levels than isocaloric maltodextrin alone during the late exercise phase (100-170 min). The hepatic glycogen content of mice administered maltodextrin, alanine, and proline was higher than that of mice ingesting maltodextrin alone 60 min after beginning exercise, but the glycogen content of the gastrocnemius muscle showed no difference. We conducted a treadmill running test to determine the effect of alanine and proline on endurance performance. The test showed that running time to exhaustion of mice that were supplemented with maltodextrin (2.0 g/kg) was longer than that of mice that were supplemented with water alone. Maltodextrin supplementation (1.0 g/kg) with alanine (0.9 g/kg) and proline (0.1 g/kg) further increased running time to exhaustion compared to maltodextrin alone (2.0 g/kg). These results indicate that combined supplementation of carbohydrate, alanine, and proline is effective for maintaining blood glucose and hepatic glycogen levels and increasing endurance performance during long-term exercise in mice.
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Affiliation(s)
- Yoshihito Nogusa
- Frontier Research Labs, Institute for Innovation, Ajinomoto Co., Inc
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Ghosh S, Tano-Debrah K, Aaron GJ, Otoo G, Strutt N, Bomfeh K, Kitamura S, Suri DJ, Murakami H, Furuta C, Sarpong D, Saalia F, Nakao Y, Amonoo-Kuofi H, Uauy R, Toride Y. Improving complementary feeding in Ghana: reaching the vulnerable through innovative business--the case of KOKO Plus. Ann N Y Acad Sci 2015; 1331:76-89. [PMID: 25514865 DOI: 10.1111/nyas.12596] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaching vulnerable populations in low-resource settings with effective business solutions is critical, given the global nature of food and nutrition security. Over a third of deaths of children under 5 years of age are directly or indirectly caused by undernutrition. The Lancet series on malnutrition (2013) estimates that over 220,000 lives of children under 5 years of age can be saved through the implementation of an infant and young child feeding and care package. A unique project being undertaken in Ghana aims to bring in two elements of innovation in infant and young child feeding. The first involves a public-private partnership (PPP) to develop and test the efficacy and effectiveness of the delivery of a low-cost complementary food supplement in Ghana called KOKO Plus™. The second involves the testing of the concepts of social entrepreneurship and social business models in the distribution and delivery of the product. This paper shares information on the ongoing activities in the testing of concepts of PPPs, social business, social marketing, and demand creation using different delivery platforms to achieve optimal nutrition in Ghanaian infants and young children in the first 2 years of life. It also focuses on outlining the concept of using PPP and base-of-the-pyramid approaches toward achieving nutrition objectives.
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Affiliation(s)
- Shibani Ghosh
- Nevin Scrimshaw International Nutrition Foundation, Boston, Massachusetts.,Friedman School of Nutrition Science and Policy, Tufts University, Boston, Massachusetts
| | | | - Grant J Aaron
- Global Alliance for Improved Nutrition, Geneva, Switzerland
| | | | - Nicholas Strutt
- Nevin Scrimshaw International Nutrition Foundation, Boston, Massachusetts
| | | | | | - Devika J Suri
- Nevin Scrimshaw International Nutrition Foundation, Boston, Massachusetts
| | | | | | | | - F Saalia
- University of Ghana, Legon, Accra, Ghana
| | | | | | - Ricardo Uauy
- Nevin Scrimshaw International Nutrition Foundation, Boston, Massachusetts
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Takimoto T, Kanbayashi Y, Toyoda T, Adachi Y, Furuta C, Suzuki K, Miwa T, Bannai M. 4β-Hydroxywithanolide E isolated from Physalis pruinosa calyx decreases inflammatory responses by inhibiting the NF-κB signaling in diabetic mouse adipose tissue. Int J Obes (Lond) 2014; 38:1432-9. [PMID: 24566854 DOI: 10.1038/ijo.2014.33] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 01/27/2014] [Accepted: 01/27/2014] [Indexed: 02/03/2023]
Abstract
BACKGROUND Chronic inflammation in adipose tissue together with obesity induces insulin resistance. Inhibitors of chronic inflammation in adipose tissue can be a potent candidate for the treatment of diabetes; however, only a few compounds have been discovered so far. The objective of this study was to find a novel inhibitor that can suppress the inflammatory response in adipose tissue and to elucidate the intracellular signaling mechanisms of the compound. METHODS To find the active compounds, we established an assay system to evaluate the inhibition of induced MCP-1 production in adipocyte/macrophage coculture in a plant extract library. The active compound was isolated by performing high-performance liquid chromatography (HPLC) and was determined as 4β-hydroxywithanolide E (4βHWE) by nuclear magnetic resonance (NMR) and mass spectroscopy (MS) spectral analyses. The effect of 4βHWE on inflammation in adipose tissue was assessed with adipocyte culture and db/db mice. RESULTS During the screening process, Physalis pruinosa calyx extract was found to inhibit production of MCP-1 in coculture strongly. 4βHWE belongs to the withanolide family of compounds, and it has the strongest MCP-1 production inhibitory effect and lowest toxicity than any other withanolides in coculture. Its anti-inflammatory effect was partially dependent on the attenuation of NF-κB signaling in adipocyte. Moreover, in vivo experiments showed that the oral administration of 4βHWE to db/db mice resulted in the inhibition of macrophage invasion and cytokine expression in adipose tissue after 2 weeks of treatment; improved the plasma adiponectin, non-esterified fatty acids and MCP-1 concentrations; and increased glucose tolerance after 3 to 4 weeks of treatment. CONCLUSIONS These results suggest that 4βHWE has anti-inflammatory effect via inhibition of NF-κB activation in adipocyte. Moreover, the attenuation of inflammation in adipocyte has an effect on the inhibition of macrophage accumulation in obese adipose tissue. Consequently, 4βHWE improves impaired glucose tolerance. Thus, 4βHWE is a useful natural anti-inflammatory compound to attenuate progression of diabetes and obesity.
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Affiliation(s)
- T Takimoto
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
| | - Y Kanbayashi
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
| | - T Toyoda
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
| | - Y Adachi
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
| | - C Furuta
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
| | - K Suzuki
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
| | - T Miwa
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
| | - M Bannai
- Frontier Research Laboratories, Institute for Innovation, Ajinomoto Co., Inc., Kawasaki-Ku, Kawasaki, Japan
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Furuta C, Murakami H. Enhancing protein quality by lysine and soy protein prevents growth suppression under protein, energy and micronutrient restriction in young male rats. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1031.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chie Furuta
- Frontier Research Labs.Ajinomoto Co., INC.Kawasaki-shiJapan
- Tufts UniversityBostonMA
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Ohyama K, Furuta C, Nogusa Y, Nomura K, Miwa T, Suzuki K. Catechin-rich grape seed extract supplementation attenuates diet-induced obesity in C57BL/6J mice. Ann Nutr Metab 2011; 58:250-8. [PMID: 21829010 DOI: 10.1159/000330444] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Accepted: 06/30/2011] [Indexed: 01/29/2023]
Abstract
BACKGROUND Grape seed extracts (GSE) are known to present health benefits such as antioxidative and anti-obesity effects in animal models. The purpose of this research is to determine whether the specially manufactured GSE, catechin-rich GSE (CGSE), can protect against obesity induced by a high-fat diet (HFD) and to address the mechanism underlying this effect. METHODS The componential analysis of CGSE was performed using liquid chromatography/mass spectrometry. Oxygen consumption and the respiratory quotient were determined using 500 mg/kg CGSE administered orally for 3 days in 14- to 15-week-old male C57BL/6J mice. Nine-week-old male C57BL/6J mice were supplemented with 0.5 or 1% CGSE in a HFD for 12 weeks, and their body weight and food intake were monitored. Blood and tissue samples were collected and analyzed. RESULTS The main polyphenol components of CGSE were catechin and epicatechin. CGSE supplementation in the HFD-induced obesity model chronically suppressed the increase in body weight and the weight of fat pads. Furthermore, CGSE improved metabolic parameter abnormalities and upregulated the fatty acid oxidation-related genes in the liver. CONCLUSIONS These findings suggest that CGSE contains monomeric catechins in high concentrations and ameliorates HFD-induced obesity in C57BL/6J mice.
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Affiliation(s)
- Kana Ohyama
- Institute for Innovation, Ajinomoto Co., Inc., Kawasaki, Japan
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Furuta C, Arakawa S, Shi Z, Watanabe G, Taya K. Placental activin A is required for follicular development during the second half of pregnancy in the golden hamster (Mesocricetus auratus). Endocrine 2008; 33:126-34. [PMID: 18491238 DOI: 10.1007/s12020-008-9073-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2008] [Revised: 04/07/2008] [Accepted: 04/25/2008] [Indexed: 10/22/2022]
Abstract
Numerous antral follicles develop during the second half of pregnancy in the golden hamster even though LH and FSH are maintained at basal levels. To investigate the possible hormone actions of activin A associated with follicular development, pregnant golden hamsters were placentectomized on day 6 of pregnancy and animals were sacrificed at day 8, 10, 12, or 14 of pregnancy. There was a drastic decrease in the plasma concentrations of activin A from day 10 of pregnancy in the operated group compared to the controls. Positive immunohistochemical staining of inhibin/activin subunits betaA and betaB in the syncytiotrophoblast of the placenta revealed the source of activin A, AB, or B. The number of healthy follicles did not change until day 12 between the operated and the control groups, but decreased in numbers in the operated groups thereafter. The decreased concentrations of inhibin A, B, and estradiol-17beta in the operated groups at day 10 and 12 correlated well with the number of mature follicles in response to hCG treatment. In conclusion, we revealed that activin A secreted from the placenta induces folliculogenesis to maintain the high levels of estradiol-17beta needed to induce uterine dilatation for fetus growth and impending parturition.
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Affiliation(s)
- Chie Furuta
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Gifu, 501-1193, Japan
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Jaroenporn S, Furuta C, Nagaoka K, Watanabe G, Taya K. Comparative effects of prolactin versus ACTH, estradiol, progesterone, testosterone, and dihydrotestosterone on cortisol release and proliferation of the adrenocortical carcinoma cell line H295R. Endocrine 2008; 33:205-9. [PMID: 18484195 DOI: 10.1007/s12020-008-9075-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Revised: 04/28/2008] [Accepted: 05/01/2008] [Indexed: 11/29/2022]
Abstract
In this study, using the H295R cell line as a model system, we investigated the role of prolactin (PRL) and steroid hormones in the growth regulation and cortisol release of adrenocortical cells. H295R cells were treated with increasing doses (10(-13)-10(-6) M) of PRL, adrenocorticotropic hormone (ACTH), 17beta-estradiol (E(2)), progesterone (P(4)), testosterone (T), and dihydrotestosterone (DHT). As expected, ACTH raised cortisol secretion and increased the proliferation rate of cultured cells. Incubation with T, DHT, E(2), and P(4) for 24 h did not significantly increase cortisol release. Conversely, PRL concentrations of 10(-8)-10(-6) M caused a significant increase in the release of cortisol. Long-term (5 days) stimulation of H295R cells with E(2), P(4), and PRL was a trigger to increased cell proliferation, while T and DHT did not alter H295R cell proliferation. Taken together, these results indicate that steroid hormones exert differential effects on adrenocortical function. Additionally, the present study demonstrates that PRL had biphasic actions in regulating adrenocortical function. PRL may form a novel regulatory system for steroid hormone secretion and cell proliferation in the adrenal cortex.
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Affiliation(s)
- Sukanya Jaroenporn
- Department of Basic Veterinary Science, The United School of Veterinary Sciences, Gifu University, Gifu, 501-1193, Japan
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Li C, Taneda S, Suzuki AK, Furuta C, Watanabe G, Taya K. Effects of 3-Methyl-4-nitrophenol on the Suppression of Adrenocortical Function in Immature Male Rats. Biol Pharm Bull 2007; 30:2376-80. [DOI: 10.1248/bpb.30.2376] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- ChunMei Li
- Environmental Nanotoxicology Section, Research Center for Environmental Risk, National Institute for Environmental Studies
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
| | - Shinji Taneda
- Environmental Nanotoxicology Section, Research Center for Environmental Risk, National Institute for Environmental Studies
| | - Akira K. Suzuki
- Environmental Nanotoxicology Section, Research Center for Environmental Risk, National Institute for Environmental Studies
| | - Chie Furuta
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
- Department of Basic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
| | - Gen Watanabe
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
- Department of Basic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
| | - Kazuyoshi Taya
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
- Department of Basic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University
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14
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Li C, Takahashi S, Taneda S, Furuta C, Watanabe G, Suzuki AK, Taya K. Effects of 3-Methyl-4-Nitrophenol in Diesel Exhaust Particles on the Regulation of Reproductive Function in Immature Female Japanese Quail (Coturnix japonica). J Reprod Dev 2007; 53:673-8. [PMID: 17202750 DOI: 10.1262/jrd.18133] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In a previous study, we found that 3-methyl-4-nitrophenol (PNMC), a component of diesel exhaust particles and also a degradation product of the insecticide fenitrothion, exhibits reproductive toxicity in the adult male Japanese quail. The present study investigated the toxicity of PNMC in the female Japanese quail and its ability to influence reproduction in immature females. The quail (21-day-old) were injected intramuscularly (im) with PNMC at doses 0.1, 1 or 10 mg/kg body weight daily for 3 days. There was no significant difference in body growth between the PNMC-administered and control birds. However, the weights of the oviducts were significantly lower in the PNMC-treated birds at all doses. Furthermore, the plasma concentrations of luteinizing hormone (LH) and estradiol-17 beta were significantly decreased with 1 and 10 mg/kg of PNMC. These findings suggest that PNMC might influence the hypothalamo-pituitary-gonadal axis with decreasing in secretion of GnRH, LH and ovarian steroid hormones and subsequently disturb growth of the reproductive organs of immature female quail. This study indicates that PNMC induces reproductive toxicity at the central level and disrupts reproductive function in the immature female quail.
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Affiliation(s)
- ChunMei Li
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Japan
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15
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Li C, Taneda S, Suzuki AK, Furuta C, Watanabe G, Taya K. Estrogenic and anti-androgenic activities of 4-nitrophenol in diesel exhaust particles. Toxicol Appl Pharmacol 2006; 217:1-6. [PMID: 16884752 DOI: 10.1016/j.taap.2006.06.010] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Revised: 06/15/2006] [Accepted: 06/26/2006] [Indexed: 12/01/2022]
Abstract
A 4-nitrophenol (PNP) isolated from diesel exhaust particles (DEP) has been identified as a vasodilator. PNP is also a known degradation product of the insecticide parathion. We used uterotrophic and Hershberger assays to study the estrogenic and anti-androgenic activities of PNP in-vivo. In ovariectomized immature female rats injected subcutaneously with 1, 10, or 100 mg/kg PNP daily for 7 days, significant (P<0.05) increases in uterine weight were seen in only those receiving 10 or 100 mg/kg PNP. Furthermore, in castrated immature male rats implanted with a silastic tube (length, 5 mm) containing crystalline testosterone and injected subcutaneously with 0.01, 0.1, or 1 mg/kg PNP daily for 5 days, those receiving the doses of 0.1 mg/kg showed significant (P<0.05) weight decreases in seminal vesicles, ventral prostate, levator ani plus bulbocavernosus muscles, and glans penis. Plasma FSH and LH levels did not change in female rats but were significantly (P<0.05) increased in male rats treated with 0.1 mg/kg PNP. These results clearly demonstrated that PNP has estrogenic and anti-androgenic activities in-vivo. Our results therefore suggest that diesel exhaust emissions and the degradation of parathion can lead to accumulation of PNP in air, water, and soil and thus could have serious deleterious effects on wildlife and human health.
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Affiliation(s)
- ChunMei Li
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
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16
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Li C, Taneda S, Suzuki AK, Furuta C, Watanabe G, Taya K. Effects of 3-Methyl-4-Nitrophenol in Diesel Exhaust Particles on the Regulation of Testicular Function in Immature Male Rats. ACTA ACUST UNITED AC 2006; 28:252-8. [PMID: 17021341 DOI: 10.2164/jandrol.106.000802] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the effects of 3-methyl-4-nitrophenol (4-nitro-m-cresol, PNMC) isolated from diesel exhaust particles (DEP) on the reproductive functions of male rats. Twenty-eight-day-old rats were injected subcutaneously with PNMC (1, 10, or 100 mg/kg) daily for 5 days. The weights of the epididymis, seminal vesicle, and Cowper gland were significantly decreased in rats treated with 10 mg/kg PNMC. The plasma concentrations of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were significantly increased by PNMC at 100 mg/kg. However, the plasma concentrations of testosterone and immunoreactive (ir)-inhibin were significantly decreased by PNMC at 100 mg/kg. The testosterone content of the testicles was significantly decreased in the group treated with 100 mg/kg PNMC compared with the control group. Furthermore, testicular concentration of ir-inhibin was significantly decreased by PNMC at 1 mg/kg or 100 mg/kg. To investigate the direct effects of PNMC on the secretion of LH and FSH from the anterior pituitary gland, and on the secretion of testosterone from the testes, we exposed cultured anterior pituitary and interstitial Leydig cells to PNMC (10(-6), 10(-5), 10(-4) M) with or without gonadotropin-releasing hormone (GnRH; 10 nM) (for the LH and FSH tests) and human chorionic gonadotropin (hCG; 0.1 IU/mL) (for the testosterone test) for 24 hours. PNMC did not change either the basal or GnRH-stimulated levels of FSH and LH secretion. However, PNMC significantly inhibited both basal and hCG-stimulated testosterone production. These findings suggest that PNMC has a direct effect on the testes of immature male rats, causing a reduction in testosterone secretion.
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Affiliation(s)
- Chunmei Li
- Department of Basic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
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17
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Li C, Taneda S, Suzuki AK, Furuta C, Watanabe G, Taya K. Anti-androgenic activity of 3-methyl-4-nitrophenol in diesel exhaust particles. Eur J Pharmacol 2006; 543:194-9. [PMID: 16822498 DOI: 10.1016/j.ejphar.2006.06.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Revised: 05/21/2006] [Accepted: 06/06/2006] [Indexed: 10/24/2022]
Abstract
In our continuing studies on nitrophenol derivatives as vasodilators in diesel exhaust particles, we have reported that nitrophenols in diesel exhaust particles possess not only vasodilatory activity but also estrogenic activity in vitro and in vivo, as well as anti-androgenic activity in vitro. Our efforts here were focused on the in vitro and in vivo anti-androgenic activity of 3-methyl-4-nitrophenol (4-nitro-m-cresol; PNMC), known a degradation product of the insecticide fenitrothion, in diesel exhaust particles. We investigated its anti-androgenic activity using an in vitro recombinant yeast screen and in vivo Hershberger assays. Recombinant yeast screen assay showed that PNMC possesses anti-androgenic activity at low concentrations. Furthermore, castrated 28-day-old immature male rats each implanted with a 5-mm-long silastic tube containing crystalline testosterone and injected with PNMC subcutaneously at doses from as low as 0.01 and 0.1 mg/kg up to 1 mg/kg for 5 consecutive days showed significantly decreased weights of the seminal vesicles, ventral prostate, and glans penis. Plasma follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels were significantly increased in the 0.1 mg/kg PNMC treatment group. Our results demonstrate that PNMC in diesel exhaust particles clearly has anti-androgenic activity both in vitro and in vivo and can therefore be considered as an endocrine-disrupting chemical.
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Affiliation(s)
- ChunMei Li
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
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18
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Furuta C, Ema H, Takayanagi SI, Ogaeri T, Okamura D, Matsui Y, Nakauchi H. Discordant developmental waves of angioblasts and hemangioblasts in the early gastrulating mouse embryo. Development 2006; 133:2771-9. [PMID: 16794034 DOI: 10.1242/dev.02440] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Vasculogenesis and hematopoiesis are thought to arise in hemangioblasts,the common progenitors of cells in vessels and in blood. This scheme was challenged by kinetic analysis of vascular endothelial and hematopoietic progenitors in early gastrulating mouse embryos. The OP-9 co-culture system with a combination of cytokines permitted the detection of endothelial progenitors, as well as stroma-dependent hematopoietic progenitors. Endothelial progenitors were detected as early as embryonic day (E) 5.50,after which time their numbers increased. Stroma-dependent hematopoietic progenitors were detected at E6.75, the time point when hemangioblasts reportedly emerge. Colony-forming units in culture (CFU-c), most likely generated from stroma-dependent hematopoietic progenitors via contact with the microenvironment, were detected at E7.50, concomitant with the onset of primitive hematopoiesis in the yolk sac. The presence of nucleated erythrocytes and the expression of an embryonic-type globin in erythroid colonies derived from stroma-dependent hematopoietic progenitors and from CFU-c support the notion that these progenitors coordinately establish primitive hematopoiesis. Using Oct3/4 promoter-driven GFP transgenic mice,early endothelial progenitors, stroma-dependent hematopoietic progenitors, and CFU-c were all shown to express the Oct3/4 transcription factor. Among Oct3/4-positive cells, both endothelial and hematopoietic progenitors were present in the CD31-positive fraction, leaving a subset of endothelial progenitors in the CD31-negative fraction. These data imply that Oct3/4-positive mesoderm gives rise to CD31-negative angioblasts,CD31-positive angiboblasts and CD31-positive hemangioblasts. We propose a distinct developmental pathway in which the angioblast lineage directly diverges from mesoderm prior to and independent of hemangioblast development.
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Affiliation(s)
- Chie Furuta
- Laboratory of Stem Cell Therapy, Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo, 108-8639, Japan
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19
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Li C, Takahashi S, Taneda S, Furuta C, Watanabe G, Suzuki AK, Taya K. Impairment of testicular function in adult male Japanese quail (Coturnix japonica) after a single administration of 3-methyl-4-nitrophenol in diesel exhaust particles. J Endocrinol 2006; 189:555-64. [PMID: 16731786 DOI: 10.1677/joe.1.06628] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The effects of 3-methyl-4-nitrophenol (PNMC), a component of diesel exhaust, on reproductive function were investigated in adult male Japanese quail. The quail were treated with a single i.m. dose of PNMC (78, 103 or 135 mg/kg body weight), and trunk blood and testes were collected 1, 2 or 4 weeks later. Various levels of testicular atrophy were observed in all groups treated with PNMC. Sperm formation, cloacal gland area, and plasma LH and testosterone concentrations were also reduced in birds with testicular atrophy. To determine the acute effect of PNMC on gonadotrophin from the pituitary, adult male quail were administrated a single i.m. injection of PNMC (25 mg/kg), and plasma concentrations of LH were measured at 1, 3 and 6 h. This dose significantly lowered plasma levels of LH at all three time points. These results suggest that PNMC acts on the hypothalamus-pituitary axis, by reducing circulating LH within a few hours of administration and subsequently reducing testosterone secretion. In addition, in order to investigate the direct effects of PNMC on the secretion of testosterone from testicular cells in quail testes, cultured interstitial cells containing Leydig cells were exposed to PNMC (10(-6), 10(-5) or 10(-4) M) for 4, 8 or 24 h. These quantities of PNMC significantly reduced the secretion of testosterone in a time- and dose-dependent manner. The present findings also suggest a direct effect of PNMC on the testis to reduce testosterone secretion. This study clearly indicates that PNMC induces reproductive toxicity at both the central and testicular levels, and disrupts testicular function in adult male quail.
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Affiliation(s)
- ChunMei Li
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
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20
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Li C, Watanabe G, Weng Q, Jin W, Furuta C, Suzuki AK, Kawaguchi M, Taya K. Expression of nerve growth factor (NGF), and its receptors TrkA and p75 in the reproductive organs of the adult male rats. Zoolog Sci 2006; 22:933-7. [PMID: 16141707 DOI: 10.2108/zsj.22.933] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Immunolocalization of nerve growth factor (NGF) and its receptors, TrkA and p75 in the reproductive organs of adult male rats was investigated. Sections of the testis, efferent duct, epididymis, deferent duct, seminal vesicle, coagulating gland and prostate of adult male rats were immunostained by the avidin-biotin-peroxidase complex methods (ABC). NGF was expressed in Leydig cells, primary spermatocytes and pachytene spermatocytes in the testis. TrkA only immunoreacted to elongate spermatids and p75 showed positive immunostaining in the Sertoli cells, Leydig cells, the pachytene spermatocytes and elongate spermatids. Immunoreactions for NGF and its two receptors were detected in epithelial cells of efferent duct, deferent duct and epididymis. In addition, immunoreactions for NGF and its two receptors were also observed in columnar secretory epithelium lines of the seminal vesicles, prostate and coagulating gland. These results suggest that NGF is an important growth factor in gonadal function of adult male rats.
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Affiliation(s)
- ChunMei Li
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
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Matsubara A, Iwama A, Yamazaki S, Furuta C, Hirasawa R, Morita Y, Osawa M, Motohashi T, Eto K, Ema H, Kitamura T, Vestweber D, Nakauchi H. Endomucin, a CD34-like sialomucin, marks hematopoietic stem cells throughout development. ACTA ACUST UNITED AC 2005; 202:1483-92. [PMID: 16314436 PMCID: PMC2213340 DOI: 10.1084/jem.20051325] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
To detect as yet unidentified cell-surface molecules specific to hematopoietic stem cells (HSCs), a modified signal sequence trap was successfully applied to mouse bone marrow (BM) CD34−c-Kit+Sca-1+Lin− (CD34−KSL) HSCs. One of the identified molecules, Endomucin, is an endothelial sialomucin closely related to CD34. High-level expression of Endomucin was confined to the BM KSL HSCs and progenitor cells, and, importantly, long-term repopulating (LTR)–HSCs were exclusively present in the Endomucin+CD34−KSL population. Notably, in the yolk sac, Endomucin expression separated multipotential hematopoietic cells from committed erythroid progenitors in the cell fraction positive for CD41, an early embryonic hematopoietic marker. Furthermore, developing HSCs in the intraembryonic aorta-gonad-mesonephros (AGM) region were highly enriched in the CD45−CD41+Endomucin+ fraction at day 10.5 of gestation (E10.5) and in the CD45+CD41+Endomucin+ fraction at E11.5. Detailed analyses of these fractions uncovered drastic changes in their BM repopulating capacities as well as in vitro cytokine responsiveness within this narrow time frame. Our findings establish Endomucin as a novel cell-surface marker for LTR-HSCs throughout development and provide a powerful tool in understanding HSC ontogeny.
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Affiliation(s)
- Azusa Matsubara
- Laboratory of Stem Cell Therapy, Center for Experimental Medicine, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
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22
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Katsumata E, Furuta C, Katsumata H, Watanabe G, Taya K. Basal body temperature method for detecting ovarian cycle in the Captive Beluga (Delphinapterus leucas). J Reprod Dev 2005; 52:59-63. [PMID: 16276040 DOI: 10.1262/jrd.17066] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The relationship between basal body temperature and circulating progesterone levels were investigated in a female beluga. Body temperature and serum concentrations of progesterone were measured daily and at 2-4 week intervals respectively, in a female beluga that was in captivity for 7 years between 1996 and 2003. The beluga first ovulated in April, 2000 (13 years old). Thereafter, serum concentrations of progesterone showed cyclic changes, indicating that the ovulatory cycle had started. Serum concentrations of progesterone ranged from 0.1 ng/ml to 15.7 ng/ml. Body temperature also showed cyclic changes during the estrous cycle. Body temperature ranged from 34.9 to 35.9 C, and tended to reach the peak during the high progesterone phase. Mating behavior was observed during the low body temperature phase. The changes in body temperature positively correlated with the circulating progesterone levels. The length of the estrous cycle was 36.7 +/- 3.9 (mean +/- SEM) days based on the intervals between the days of mating behavior. This is the first report demonstrating that body temperature clearly changes during the estrous cycle in a captive female beluga. The present finding suggests that measurement of body temperature is a useful method for detecting the ovarian cycle of the beluga in captivity.
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Affiliation(s)
- Etsuko Katsumata
- International Marine Biological Research Institute, Kamogawa Sea World, Chiba, Japan
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Furuta C, Li C, Taneda S, Suzuki AK, Kamata K, Watanabe G, Taya K. Immunohistological study for estrogenic activities of nitrophenols in diesel exhaust particles. Endocrine 2005; 27:33-6. [PMID: 16077168 DOI: 10.1385/endo:27:1:033] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2005] [Revised: 04/07/2005] [Accepted: 04/28/2005] [Indexed: 11/11/2022]
Abstract
We recently isolated 3-methyl-4-nitrophenol (4-nitro-m-cresol; PNMC) and 4-nitro-3-phenylphenol (PNMPP) from diesel exhaust particles (DEP) and identified them as vasodilators and xenoestrogens. The estrogenic activity of PNMC and PNMPP was further examined by using immunohistochemical staining of proliferating cell nuclear antigen (PCNA) in uterine luminal epithelium of ovariectomized 25-d-old immature female rats injected with PNMC and PNMPP subcutaneously for 2 d. Significant increases were observed in uterine luminal epithelium in PCNA positive cells of animals receiving 10 and 100 mg/kg PNMC and 0.1 mg/kg PNMPP compared with controls. These results clearly show the estrogenic activity of PNMC and PNMPP by cell proliferation on the uterine luminal epithelium.
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Affiliation(s)
- Chie Furuta
- Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu Univ, Gifu, Japan
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Furuta C, Suzuki AK, Taneda S, Kamata K, Hayashi H, Mori Y, Li C, Watanabe G, Taya K. Estrogenic Activities of Nitrophenols in Diesel Exhaust Particles1. Biol Reprod 2004; 70:1527-33. [PMID: 14736814 DOI: 10.1095/biolreprod.103.024810] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
We recently isolated 3-methyl-4-nitrophenol (4-nitro-m-cresol; PNMC) and 4-nitro-3-phenylphenol (PNMPP) from diesel exhaust particles (DEP) and identified them as vasodilators. Because these compounds are alkylphenolic derivatives that might mimic hormones, we evaluated their estrogenic activity by using recombinant yeast screens, myometrial contractility assays, and in vivo uterotrophic assays. Recombinant yeast screen assays showed that both PNMC and PNMPP possess estrogenic activity. Furthermore, ovariectomized 25-day-old immature female rats injected with PNMC and PNMPP subcutaneously for 2 days showed significant increases in uterine weight among those receiving 100 mg/kg PNMC and 0.1 and 1.0 mg/kg PNMPP. To clarify further the estrogenic activity of PNMC and PNMPP, rat uterine horns were monitored in organ bath chambers for myometrial contractility in response to oxytocin (OT). Significant differences occurred in the initial and maximum contractilities to OT at 0.25 and 25 mIU/ml in uterine horns obtained from animals treated with 100 mg/kg PNMC and in the maximum contractilities to OT at 0.025, 0.25, and 25 mIU/ml in those from rats treated with 0.1 mg/kg PNMPP. These results clearly demonstrated that PNMC and PNMPP in DEP have estrogenic activity both in vitro and in vivo and might therefore be considered as endocrine-disrupting chemicals.
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Affiliation(s)
- Chie Furuta
- Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
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25
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Taneda S, Mori Y, Kamata K, Hayashi H, Furuta C, Li C, Seki KI, Sakushima A, Yoshino S, Yamaki K, Watanabe G, Taya K, Suzuki AK. Estrogenic and Anti-androgenic Activity of Nitrophenols in Diesel Exhaust Particles (DEP). Biol Pharm Bull 2004; 27:835-7. [PMID: 15187429 DOI: 10.1248/bpb.27.835] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We recently isolated 4-nitrophenol, 2-methyl-4-nitrophenol, 3-methyl-4-nitrophenol, and 4-nitro-3-phenylphenol from diesel exhaust particles (DEP) and identified them as vasodilators. Because these compounds are alkylphenolic derivatives that might mimic hormones, we evaluated their estrogenic activity by human estrogen receptor (hER)-yeast screen assay. All of these nitrophenol derivatives except 2-methyl-4-nitrophenol exhibited estrogenic activity. Some estrogenic compounds are also anti-androgenic, so we measured the anti-androgenic activity of the same compounds by human androgen receptor (hAR)-yeast screen assay. We found anti-androgenicity in all four nitrophenols. Nitrophenols in DEP possess not only vasodilatory activity but also estrogenic and anti-androgenic activity.
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Affiliation(s)
- Shinji Taneda
- PM2.5/DEP Research Project, National Institute for Environmental Studies, Onogawa, Tsukuba, Japan.
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