Project description:Non-optimal fetal environments resulting in low birth weight have epidemiologically been associated with a higher risk of adult diseases. In animal models, maternal undernutrition has successfully demonstrated that offspring owed increased risks for adult diseases. In mice, shorten life span was also demonstrated in offspring following maternal undernutrition. In the present study, we treated pregnant mice with 50% food restriction (FR), and performed global gene expression and promotor DNA methylation profiling on the fetal livers. Considering that effects of food restriction is opposite between before and after birth, we further searched genes which are regulated oppositely against adult calorie restriction (CR) and commonly against aging. Among searched genes, trib1 has already been demonstrated to contribute to a risk of cardiovascular disease, hypertriglyceridaemia and insulin resistance. The present result suggests that expression of trib1 is affected by maternal nutrition, and is one of the most responsible genes for developmental origins of metabolic syndrome. In addition, lepr was also down-regulated by maternal FR, suggested a potential role of this gene in induction of obesity and diabetes. Promotor DNA methylation profiling as well as gene expression profiling revealed that glucocorticoid receptor target genes were regulated by maternal FR. This finding supports previous studies that suggest an important role for glucocorticoid in developmental origins of metabolic syndrome. In the immune system, most of the genes related to interferon were down-regulated in their expression with up-regulation of their promoter DNA methylation. The profiling also suggested diminished NF-κB signalling. These results suggested that maternal FR affected development of the immune system. We presented here a list of genes responsible for developmental origins of health and disease, which were regulated oppositely against adult CR, and commonly against aging, and also affected their promotor DNA methylation. The present list hopefully contributes to prediction of risks for non communicable diseases, and also prediction of prenatal environment of nutrition from offspring materials. Here we carried out global gene expression profiling analysis on the fetal mouse liver following maternal 50% FR. Considering that opposite effects of nutrition between the fetus and adult, we further analyzed our fetal array data by comparing with data from their mothers, and array data on the effect of CR and aging in previous reports using adult rodent tissues. In addition, we performed global DNA methylation analysis using mouse promoter microarray, and compared the results with data of the gene expression analysis. Finally, we presented a list of candidate genes responsible for DOHaD.

Project description:Non-optimal fetal environments resulting in low birth weight have epidemiologically been associated with adult diseases. In animal models, maternal undernutrition has successfully demonstrated increased risks for adult diseases. In the present study, we treated pregnant mice with 50% food restriction (FR), and performed global gene expression and promotor DNA methylation profiling on the fetal livers. Considering that effects of food restriction is opposite between before and after birth, we further searched genes which are regulated oppositely against adult calorie restriction and commonly against aging. Searched genes were included in groups related to the immune system, obesity and heart disease. Among these genes, trib1 has already been demonstrated to contribute to an increased risk of cardiovascular disease. The present result suggests that trib1 is a target of DOHaD. In addition, lepr was also dow-regulaed by maternal FR, suggested a potential role of this gene in induction of obesity. Promotor DNA methylation profiling as well as gene expression profiling revealed glucocorticoid target genes were regulated by maternal FR, supported previous reports suggesting important role of glucocorticoid in DOHaD. C57BL/6J mice were purchased from Japan SLC Co. Ltd. (Hamamatsu, Japan). The animals were housed at the Animal Institution in Showa University. They were maintained in cages in a ventilated animal room with controlled temperature and relative humidity with a 12 h light: 12 h dark schedule (lights turned on at 8:00 AM) and had access to chow (CE-2, CLEA Japan) and tap water ad libitum. As per the supplier’s (CLEA) information, CE-2 includes 51.4% nitrogen free extracts, 24.9% crude protein, 8.6% moisture, 6.7% crude ash, 4.6% crude fat, and 3.7% crude fiber. The physiological fuel value is 346.7 kcal per 100 g chow. All animal experiments were started after a period of acclimation of at least one week. Pregnant animals were obtained by housing females with males (1-2 females/male). The day the vaginal plug was observed was designated embryonic day 0 (ED0) and gestation day 0 (GD0). Pregnant mice were exposed to 50% food restriction (FR) from GD 10 to 17 and caesarean section was performed between 10:00-12:00 AM on GD18. Amount of CE-2 chow supplied FR group was calculated as 50% of CE-2 consumed by control group each gestation day. Control group was supplied with chow ad libitum. Pregnant mice were sacrificed by cervical dislocation, and the fetuses were taken out and anesthetized on ice cold phosphate buffered saline. The fetuses were dissected under a dissection microscope, and fetal tissues were carefully removed avoiding any other tissues contamination. The liver was collected from six mothers in each group. Fetal liver was collected from two male fetuses from each mother. The liver was also collected from mothers to compare with fetal one in gene expression analysis. The harvested livers were immediately immersed in liquid nitrogen (N2) and stored at -80ºC. In all combinations, total RNA (1000 ng) was labeled with either Cy3 or Cy5 dye using an Agilent Low RNA Input Fluorescent Linear Amplification Kit (Agilent Technologies Inc., CA, USA). Fluorescently labeled targets of control as well as treated samples were hybridized to the same microarray slide with 60-mer probes (4 x 44K (41,090 gene probes), mouse whole genome, Agilent). A flip labelling (dye-swap or reverse labelling with Cy3 and Cy5 dyes) procedure was followed to nullify the dye bias associated with unequal incorporation of the two Cy dyes into cDNA. Hybridization and wash processes were performed according to the manufacturer’s instructions, and hybridized microarrays were scanned using an Agilent Microarray scanner. For the detection of significantly differentially expressed genes between control and exercise samples each slide image was processed by Agilent Feature Extraction software (version 9.5.3.1).

Project description:A large number of rodent studies have supported the developmental origins of health and disease (DOHaD) hypothesis that interauterine undernutrition (IU) is a risk factor for non-communicable diseases. The effect of IU is considered to be induced thorough epigenetic programming in the fetal tissues. We have recently carried out global transcriptome expression and promoter DNA methylation analyses on the fetal mouse liver following maternal 50% food restriction (FR) during late gestation, and reported a list of fetal liver genes that were transcriptionally or epigenetically regulated by IU (Ogawa et al., 2014, Congenital Anomalies). We have already reported the genes that were regulated oppositely between maternal and fetal livers (Ogawa et al., 2014, Congenital Anomalies). Here, we considered that the fetal liver is a hematopoietic organ, and exposed nine-week-old male mice (C57BL/6J from Japan SLC, Hamamatsu, Japan; n=8 / group) to 50% FR (chow; CE-2, CLEA, Tokyo Japan) for two weeks and carried out global gene expression analysis on the whole blood by a method reported previously (Ogawa et al., 2014, Congenital Anomalies). Male C57BL/6J mice at 9 weeks (Japan SLC, Hamamatsu, Japan ; n=8 / group) were exposed to 50% FR (chow; CE-2, CLEA, Tokyo Japan) for 2 weeks. After 2 weeks, the mice were anesthetized with somunopentylÂ®(Kyoritsu eiyaku, Tokyo) at a dose of 0.5 mL/kg, and blood was taken from the right ventricle of the heart. Blood samples were immediately immersed in liquid nitrogen and stored at -80Â°C. All animal care and experimental procedures were approved by the Institutional Animal Care and Use Committee of Showa University, and caried out at animal facilities in Showa University. DNA Microarray analysis was carried out on 3 pools, respectively. Pool 1 included samples from animal No. 1-8 in each group (control and 50% FR). Pool 2 included samples from animal No. 1-4 in each group. Pool 3 included samples from animal No. 5-8 in each group.

Project description:A diet rich in nucleic acids and protamin protein, termed as nucleoprotein (NP), has been attracting a great deal of attention in food science for its beneficial effects. In the present study, we performed a global gene expression profiling in mice fed with NP diet rich in nucleoproteins from the salmon testis. Since our recent research has revealed anti-inflammatory effect of the NP diet, we induced inflammation by lipopolysaccharide (LPS) injection in the mice for this analysis study. Mice were fed with NP diet for 4 weeks followed by a single injection of LPS. The liver and spleen were removed 6 h post-LPS injection. Total RNA extracted from livers (L) and spleens (S) was pooled in each group (control and NP diet), prior to DNA microarray analysis (Agilent mouse whole genome 4 x 44K). Results revealed 322 & 702 up (>1.5 fold)- and down (<0.75 fold)-regulated genes in the liver, and 325 & 501 up- and down-regulated genes in the spleen, respectively following NP diet. Analysis of genes related to inflammation suggests increased activity of immune function during acute period of LPS injection, which may contribute to early demise of inflammation. NP diet can be expected to be useful for inhibition of inflammatory reactions whose over-accumulation is thought to be related to the acceleration of aging process. To investigate the effect of NP, we added S-nuclegen® at a concentration of 1.2% into CLEA basic purified diet (CLEA JAPAN, Inc., Tokyo, Japan) known to include nucleic acids (NAs) at much lower amounts than standard diet. By HPLC analysis CLEA basic purified diet (low NP), and 1.2% NP diet included 0.03%, and 0.5% NAs, respectively. Male C57BL/6J mice (7 weeks) were fed with NP diet for 4 weeks followed by a single injection of LPS at a dose of 10 mg/kg. The liver and spleen were removed 6 h post-LPS injection. Total RNA extracted from livers and spleens was pooled in each group (control and NP diet), prior to DNA microarray analysis (Agilent mouse whole genome 4 x 44K).

Project description:The present study examines the effects of whale meat extract (WME) supplementation on the senescence-accelerated mouse prone 8 (SAMP8) model at the level of learning memory formation and gene expression profiles genome-wide. Our present study builds up on these previous studies by focusing on two sets of experiments examining WME-supplemented diet, on SAMP8 and SAMR1 (senescence-accelerated mouse resistant 1) learning and memory deficits (experiment 1) and whole-genome DNA microarray-based transcriptomics profiling in conjunction with Ingenuity Pathway Analysis (IPA) (experiment 2). We also examined the SAMP8 and SAMR1 mice fed with the regular (control; low-safflower oil, LSO) diets specifically to know the gene profiles in the brain of the SAMP8 mouse. Results revealed that WME supplementation on SAMP8 mouse resulted in an increase in the level of learning memory formation and positive changes in the transcriptome of the brain, suggested through the observation of recovery of gene expressions in the SAMP8 model over the not-supplemented mouse. 6-week-old mice (SAMP8 and SAMR1; CLEA, Tokyo, Japan) were housed at the Animal Institution Facility in Showa University, and maintained in individual cages in a ventilated animal room with controlled temperature and relative humidity under a 12-h light: 12-h dark regime (8:00 AM, lights turned on). Mice were fed chow (CE-2, CLEA Japan) and tap water ad libitum until 24-weeks-old. Then, 24-week-old SAMs mice were given experimental diet, LSO diet as a control diet and WME-supplemented diet, both in a powder form. The WME was made from red meat of Antarctic minke whale (Balaenoptera bonaerensis), taken from the Japanese Whale Research Program under Special Permit in the Antarctic-Phase II in 2009/2010 by heat, enzyme and drying treatments. The quality standard of WE were measured by Marugei Co. Ltd. (Hyogo, Japan). SAMP8 mice were randomly given LSO or WME diet, respectively. SAMR1 mice were given LSO diet only until 50-weeks-old. The behavioral tests were performed at the timing of 49-weeks-old for 8 days. At the end of the experiment (50 weeks of age) following the behavioral analysis (open field test, Y-maze test, new object recognition test (NOR), and water-filled multiple T-maze) and the last day of the feeding, the mice were removed from their cages, decapitated and their brains carefully removed on ice. The whole brains were quickly frozen in liquid nitrogen in a sterile freeze tube and stored at -80ÂºC till extraction of total RNA followed by DNA microarray analysis using a whole-genome mouse chip (Agilent-014868, 4 x 44K (G4122F)) with two-color dye-swap approach in conjunction with IPA bioinformatic analysis. All animal studies were conducted in accordance with the Standards Relating to the Care Management of Experimental Animalsâ (Notice No. 6 of the Office of Prime Minister dated March 27, 1980) and with approval from the Animal Use Committee of Showa University (Approval Number: #04093).

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Seeking genes responsible for developmental origins of health and disease from the fetal mouse liver following maternal food restriction

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