361. Dietary l-threonine supplementation attenuates lipopolysaccharide-induced inflammatory responses and intestinal barrier damage of broiler chickens at an early age.
作者: Yueping Chen.;Hao Zhang.;Yefei Cheng.;Yue Li.;Chao Wen.;Yanmin Zhou.
来源: Br J Nutr. 2018年119卷11期1254-1262页
This study was conducted to investigate the protective effects of l-threonine (l-Thr) supplementation on growth performance, inflammatory responses and intestinal barrier function of young broilers challenged with lipopolysaccharide (LPS). A total of 144 1-d-old male chicks were allocated to one of three treatments: non-challenged broilers fed a basal diet (control group), LPS-challenged broilers fed a basal diet without l-Thr supplementation and LPS-challenged broilers fed a basal diet supplemented with 3·0 g/kg l-Thr. LPS challenge was performed intraperitoneally at 17, 19 and 21 d of age, whereas the control group received physiological saline injection. Compared with the control group, LPS challenge impaired growth performance of broilers, and l-Thr administration reversed LPS-induced increase in feed/gain ratio. LPS challenge elevated blood cell counts related to inflammation, and pro-inflammatory cytokine concentrations in serum (IL-1β and TNF-α), spleen (IL-1β and TNF-α) and intestinal mucosa (jejunal interferon-γ (IFN-γ) and ileal IL-1β). The concentrations of intestinal cytokines in LPS-challenged broilers were reduced by l-Thr supplementation. LPS administration increased circulating d-lactic acid concentration, whereas it reduced villus height, the ratio between villus height and crypt depth and goblet density in both jejunum and ileum. LPS-induced decreases in jejunal villus height, intestinal villus height:crypt depth ratio and ileal goblet cell density were reversed with l-Thr supplementation. Similarly, LPS-induced alterations in the intestinal mRNA abundances of genes related to intestinal inflammation and barrier function (jejunal toll-like receptor 4, IFN- γ and claudin-3, and ileal IL-1 β and zonula occludens-1) were normalised with l-Thr administration. It can be concluded that l-Thr supplementation could attenuate LPS-induced inflammatory responses and intestinal barrier damage of young broilers.
362. Apatorsen plus docetaxel versus docetaxel alone in platinum-resistant metastatic urothelial carcinoma (Borealis-2).
作者: Jonathan E Rosenberg.;Noah M Hahn.;Meredith M Regan.;Lillian Werner.;Ajjai Alva.;Saby George.;Joel Picus.;Robert Alter.;Arjun Balar.;Jean Hoffman-Censits.;Petros Grivas.;Richard Lauer.;Elizabeth A Guancial.;Christopher Hoimes.;Guru Sonpavde.;Constantine Albany.;Mark N Stein.;Tim Breen.;Cindy Jacobs.;Kirsten Anderson.;Joaquim Bellmunt.;Aly-Khan A Lalani.;Sumanta Pal.;Toni K Choueiri.
来源: Br J Cancer. 2018年118卷11期1434-1441页
A randomised study to assess the addition of apatorsen, an antisense oligonucleotide that inhibits Hsp27 expression, to docetaxel in patients with metastatic urothelial carcinoma (mUC) relapsed after prior platinum-based chemotherapy.
363. Phase I studies of AZD1208, a proviral integration Moloney virus kinase inhibitor in solid and haematological cancers.
作者: Jorge Cortes.;Kenji Tamura.;Daniel J DeAngelo.;Johann de Bono.;David Lorente.;Mark Minden.;Geoffrey L Uy.;Hagop Kantarjian.;Lisa S Chen.;Varsha Gandhi.;Robert Godin.;Karen Keating.;Kristen McEachern.;Karthick Vishwanathan.;Janet Elizabeth Pease.;Emma Dean.
来源: Br J Cancer. 2018年118卷11期1425-1433页
Proviral integration Moloney virus (PIM) kinases (PIM1, 2 and 3) are overexpressed in several tumour types and contribute to oncogenesis. AZD1208 is a potent ATP-competitive PIM kinase inhibitor investigated in patients with recurrent or refractory acute myeloid leukaemia (AML) or advanced solid tumours.
364. Lactation-related changes in tissue expression of PEDF in dairy cows.
作者: H Sadri.;B Saremi.;S Dänicke.;J Rehage.;M Mielenz.;A Hosseini.;H Sauerwein.
来源: Domest Anim Endocrinol. 2018年64卷93-101页
Pigment epithelium-derived factor (PEDF) is evolving as metabolic regulatory protein. Albeit mostly considered in only pathological conditions related to excess energy intake resulting in obesity and insulin resistance, PEDF is likely to be involved in other physiological processes such as the homeorhetic adaptation of metabolism to lactation. We aimed to characterize the expression of PEDF and its association to the concomitant mobilization of body reserves during lactation in nonobese subjects. This mobilization is particularly distinct in dairy cows, and we therefore assessed the mRNA expression of PEDF and its putative receptors in different tissues in 2 trials with dairy cows fed with or without conjugated linoleic acids (CLAs). Conjugated linoleic acids depress milk fat synthesis and may thus reduce the drain of energy via milk. In pluriparous cows, the serum PEDF concentrations and the mRNA abundance in subcutaneous adipose tissue (scAT), as well as the hepatic and scAT mRNA abundance of the putative receptors, adipose triglyceride lipase, and laminin receptor 1, changed over time of sampling (day -21 until day 252 relative to calving). Conjugated linoleic acid treatment was associated with reduced PEDF concentrations in serum and lower PEDF mRNA abundance in scAT on day 21 postpartum. Comparing different tissues from primiparous cows, PEDF mRNA was highest in the liver, followed by scAT, visceral adipose tissue (AT), and mammary gland, and lowest in the muscle. Significant changes in PEDF expression with time of sampling were limited to AT in primiparous and pluriparous cows. Our data support a regulatory role for PEDF. The similarities between the time course of the serum concentrations of PEDF and its mRNA abundance in scAT may point to a regulatory role for AT rather than the liver for PEDF in dairy cows.
365. Dietary nitrogen and calcium modulate CYP27B1 expression in young goats.
作者: M R Wilkens.;K Elfers.;M Schmicke.;G Breves.;A S Muscher-Banse.
来源: Domest Anim Endocrinol. 2018年64卷70-76页
In livestock, feeding a reduced nitrogen (N) diet is favored for economic and ecological reasons. Ruminants cope more easily with a reduced N diet than monogastric species. However, changes in mineral homeostasis such as a reduction in 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3) concentrations, calcium (Ca), and IGF1 levels were observed in goats kept on a reduced N diet. The decrease in 1,25-(OH)2D3 occurred even during a simultaneous reduction in dietary N and Ca, whereas a solitary Ca reduction stimulated 1,25-(OH)2D3 synthesis. The aim of the present study was to examine the effects of N- and/or Ca-reduced diets on the expression of 24-hydroxylase (CYP24A1), 1-alpha-hydroxylase (CYP27B1), vitamin D receptor (VDR), retinoid X receptor alpha (RXRα), IGF1 receptor (IGF1R), Klotho, and fibroblast growth factor receptor 1c (FGFR1c) in kidneys of young goats. Four groups were kept on a control diet, an N-reduced diet, a Ca-reduced diet or an N- and a Ca-reduced diet. Renal expression of CYP24A1 was not affected, whereas CYP27B1 expression was significantly diminished in the N-reduced diet fed goats (P < 0.05) and significantly elevated with the Ca reduction (P < 0.001). The VDR expression was not modified, whereas RXRα (P < 0.05) and Klotho expression (P < 0.001) were stimulated during Ca reduction. The IGF1R (P < 0.05) and FGFR1c (P < 0.05) expression were enhanced with the N reduction. From these data, it can be concluded that the downregulation of renal CYP27B1 expression observed with dietary N reduction is probably mediated by a complex interaction between the somatotropic axis and the Klotho/FGF signaling pathway in young goats.
366. Analysis of curative effect of fluoxetine and escitalopram in the depression treatment based on clinical observation.
Depression is a common affective disorder or mood disorder, which seriously affects people's physical and mental health and the quality of life. This study compared efficacy of escitalopram and fluoxetine on depression patients, and analyzed the inflammatory factors, serum homocysteine (Hcy) levels and the effects of adverse reactions, so as to provide reference for the clinical. The results showed that the total effective rate of the observation group (90.7%) was higher than that of the control group (80%), but the difference was not statistically significant (p>0.05). The total score of Hamilton Depressive Scale (HAMD) and mood in the observation group was significantly lower than that in the control group after treatment. To sum up, escitalopram and fluoxetine are effective in the treatment of depressive patients, but escitalopram can significantly improve the patient's micro inflammation and depressive symptoms Keywords: Fluoxetine, escitalopram, clinical efficacy, interleukin, mental anxiety, drug reaction.
367. Insulin Regulates Glycogen Synthesis in Human Endometrial Glands Through Increased GYS2.
作者: Clare A Flannery.;Gina H Choe.;Katherine M Cooke.;Andrew G Fleming.;Caitlin C Radford.;Pinar H Kodaman.;Michael J Jurczak.;Richard G Kibbey.;Hugh S Taylor.
来源: J Clin Endocrinol Metab. 2018年103卷8期2843-2850页
Glycogen synthesis is a critical metabolic function of the endometrium to prepare for successful implantation and sustain embryo development. Yet, regulation of endometrial carbohydrate metabolism is poorly characterized. Whereas glycogen synthesis is attributed to progesterone, we previously found that the metabolic B isoform of the insulin receptor is maximally expressed in secretory-phase endometrium, indicating a potential role of insulin in glucose metabolism.
368. Effects of caloric and noncaloric sweeteners on antroduodenal motility, gastrointestinal hormone secretion and appetite-related sensations in healthy subjects.
作者: Anne Christin Meyer-Gerspach.;Jessica R Biesiekierski.;Eveline Deloose.;Egbert Clevers.;Alessandra Rotondo.;Jens F Rehfeld.;Inge Depoortere.;Lukas Van Oudenhove.;Jan Tack.
来源: Am J Clin Nutr. 2018年107卷5期707-716页
Activation of gastrointestinal (GI) sweet taste receptors by caloric sweeteners triggers secretion of anorexigenic and inhibition of orexigenic GI hormones to regulate food intake. The effect of noncaloric sweeteners on these mechanisms is controversial. We have recently shown that motilin-induced gastric phase III contractions signal hunger feelings, thereby identifying GI motility, and its regulatory hormone motilin, as novel players in food intake regulation.
369. Interferon Gamma Messenger RNA Signature in Tumor Biopsies Predicts Outcomes in Patients with Non-Small Cell Lung Carcinoma or Urothelial Cancer Treated with Durvalumab.
作者: Brandon W Higgs.;Christopher A Morehouse.;Katie Streicher.;Philip Z Brohawn.;Fernanda Pilataxi.;Ashok Gupta.;Koustubh Ranade.
来源: Clin Cancer Res. 2018年24卷16期3857-3866页
Purpose: To identify a predictive biomarker for durvalumab, an anti-programmed death ligand 1 (PD-L1) mAb.Experimental Design: RNA sequencing of 97 advanced-stage non-small cell lung carcinoma (NSCLC) biopsies from a nonrandomized phase Ib/II clinical trial (1108/NCT01693562) were profiled to identify a predictive signature; 62 locally advanced or metastatic urothelial cancer tumors from the same study were profiled to confirm predictive utility of the signature. Thirty NSCLC patients provided pre- and posttreatment tumors for messenger RNA (mRNA) analysis. NSCLC with ≥25% tumor cells and urothelial cancer with ≥25% tumor or immune cells stained for PD-L1 at any intensity were scored PD-L1 positive (PD-L1+). Kaplan-Meier and Cox proportional hazards analyses were used to adjust for gender, age, prior therapies, histology, ECOG status, liver metastasis, and smoking. Tumor mutation burden (TMB) was calculated using data from The Cancer Genome Atlas (TCGA).Results: In the NSCLC discovery set, a four-gene IFNγ-positive (IFNγ+) signature comprising IFNγ, CD274, LAG3, and CXCL9 was associated with higher overall response rates, longer median progression-free survival, and overall survival compared with signature-low patients. IFNγ+-signature NSCLC patients had improved survival regardless of IHC PD-L1 status. These associations were replicated in a urothelial cancer cohort. The IFNγ+ signature was induced 2-fold (P = 0.003) by durvalumab after 8 weeks of therapy in patients with NSCLC, and baseline signature was associated with TMB but not survival in TCGA data.Conclusions: The IFNγ+ mRNA signature may assist in identifying patients with improved outcomes with durvalumab, independent of PD-L1 assessed by IHC. Clin Cancer Res; 24(16); 3857-66. ©2018 AACR.
370. A single preovulatory administration of ulipristal acetate affects the decidualization process of the human endometrium during the receptive period of the menstrual cycle.
作者: Saúl Lira-Albarrán.;Marta Durand.;David Barrera.;Claudia Vega.;Rocio García Becerra.;Lorenza Díaz.;Janice García-Quiroz.;Claudia Rangel.;Fernando Larrea.
来源: Mol Cell Endocrinol. 2018年476卷70-78页
In order to get further information on the effects of ulipristal acetate (UPA) upon the process of decidualization of endometrium, a functional analysis of the differentially expressed genes in endometrium (DEG) from UPA treated-versus control-cycles of normal ovulatory women was performed. A list of 1183 endometrial DEG, from a previously published study by our group, was submitted to gene ontology, gene enrichment and ingenuity pathway analyses (IPA). This functional analysis showed that decidualization was a biological process overrepresented. Gene set enrichment analysis identified LIF, PRL, IL15 and STAT3 among the most down-regulated genes within the JAK STAT canonical pathway. IPA showed that decidualization of uterus was a bio-function predicted as inhibited by UPA. The results demonstrated that this selective progesterone receptor modulator, when administered during the periovulatory phase of the menstrual cycle, may affect the molecular mechanisms leading to endometrial decidualization in response to progesterone during the period of maximum embryo receptivity.
371. Replication of a Gene-Diet Interaction at CD36, NOS3 and PPARG in Response to Omega-3 Fatty Acid Supplements on Blood Lipids: A Double-Blind Randomized Controlled Trial.
作者: Ju-Sheng Zheng.;Jiewen Chen.;Ling Wang.;Hong Yang.;Ling Fang.;Ying Yu.;Liping Yuan.;Jueping Feng.;Kelei Li.;Jun Tang.;Mei Lin.;Chao-Qiang Lai.;Duo Li.
来源: EBioMedicine. 2018年31卷150-156页
Modulation of genetic variants on the effect of omega-3 fatty acid supplements on blood lipids is still unclear.
372. Pentoxifylline Added to Steroid Window Treatment Phase Modified Apoptotic Gene Expression in Pediatric Patients With Acute Lymphoblastic Leukemia.
作者: Jesus Meza-Arroyo.;Alejandro Bravo-Cuellar.;Luis Felipe Jave-Suárez.;Georgina Hernández-Flores.;Pablo Ortiz-Lazareno.;Adriana Aguilar-Lemarroy.;Marlin Padilla-Corona.;Fernando Sanchez-Zubieta.;Oscar Gonzalez-Ramella.
来源: J Pediatr Hematol Oncol. 2018年40卷5期360-367页
Pentoxifylline is a xanthine that possesses antitumor properties and that can induce higher apoptosis in the leukemic cells of pediatric patients with acute lymphoblastic leukemia (ALL) during treatment with prednisone. We conducted a phase 1 pilot, controlled, randomized trial to evaluate the gene expression modified by pentoxifylline during the steroid window of induction to remission phase in patients newly diagnosed with ALL. Experimental and control treatments induced broad changes in the gene expression profile. Patients who received just prednisone upregulated 377 and downregulated 344 genes, in contrast with patients treated with the experimental treatment (combination of prednisone and pentoxifylline), who demonstrated upregulation of 1319 and downregulation of 1594 genes. The most important genes modified in this pathway are those with proapoptotic activity, the majority of these overexpressed. Thus, the addition of pentoxifylline to the treatment with prednisone during steroid window in patients with ALL modified the gene expression profile and changed different signal pathways of the leukemic cell. The combination of both drugs represents a therapeutic alternative for potentiating antileukemic therapy.
373. Effects of Whey Protein Hydrolysate Ingestion on Postprandial Aminoacidemia Compared with a Free Amino Acid Mixture in Young Men.
To stimulate muscle protein synthesis, it is important to increase the plasma levels of essential amino acids (EAA), especially leucine, by ingesting proteins. Protein hydrolysate ingestion can induce postprandial hyperaminoacidemia; however, it is unclear whether protein hydrolysate is associated with higher levels of aminoacidemia compared with a free amino acid mixture when both are ingested orally. We assessed the effects of whey protein hydrolysate (WPH) ingestion on postprandial aminoacidemia, especially plasma leucine levels, compared to ingestion of a free amino acid mixture. This study was an open-label, randomized, 4 × 4 Latin square design. After 12⁻15 h of fasting, 11 healthy young men ingested the WPH (3.3, 5.0, or 7.5 g of protein) or the EAA mixture (2.5 g). Blood samples were collected before ingestion and at time points from 10 to 120 min after ingestion, and amino acids, insulin, glucose and insulin-like growth factor-1 (IGF-1) concentrations in plasma were measured. Even though the EAA mixture and 5.0 g of the WPH contained similar amounts of EAA and leucine, the WPH was associated with significantly higher plasma EAA and leucine levels. These results suggest that the WPH can induce a higher level of aminoacidemia compared with a free amino acid mixture when both are ingested orally.
374. Gene-specific DNA methylation in newborns in response to folic acid supplementation during the second and third trimesters of pregnancy: epigenetic analysis from a randomized controlled trial.
作者: Aoife Caffrey.;Rachelle E Irwin.;Helene McNulty.;J J Strain.;Diane J Lees-Murdock.;Breige A McNulty.;Mary Ward.;Colum P Walsh.;Kristina Pentieva.
来源: Am J Clin Nutr. 2018年107卷4期566-575页
Emerging evidence suggests that maternal folate status can impact cognitive development in childhood. Folate-dependent DNA methylation may provide a biological mechanism to link folate status during pregnancy with cognition in the offspring.
375. Effect of motilin receptor activation on food intake and food timing.
作者: Eveline Deloose.;Jessica R Biesiekierski.;Hanne Vanheel.;Inge Depoortere.;Jan Tack.
来源: Am J Clin Nutr. 2018年107卷4期537-543页
Motilin plasma concentrations are positively correlated with hunger ratings during the fasting state. Moreover, the motilin agonist erythromycin stimulates meal requests.
376. MiR-146a-5p correlates with clinical efficacy in patients with psoriasis treated with the tumour necrosis factor-alpha inhibitor adalimumab.
作者: E Mensà.;R Recchioni.;F Marcheselli.;K Giuliodori.;V Consales.;E Molinelli.;F Prattichizzo.;M R Rippo.;A Campanati.;A D Procopio.;F Olivieri.;A M Offidani.
来源: Br J Dermatol. 2018年179卷3期787-789页 377. Encapsulation and controlled release of retinol from silicone particles for topical delivery.
作者: C Wyatt Shields.;John P White.;Erica G Osta.;Jerishma Patel.;Shashank Rajkumar.;Nickolas Kirby.;Jean-Philippe Therrien.;Stefan Zauscher.
来源: J Control Release. 2018年278卷37-48页
Retinol, a derivative of vitamin A, is a ubiquitous compound used to treat acne, reduce wrinkles and protect against conditions like psoriasis and ichthyosis. While retinol is used as the primary active ingredient (AI) in many skin care formulations, its efficacy is often limited by an extreme sensitivity to degrade and toxicity at high concentrations. While microencapsulation is an appealing method to help overcome these issues, few microencapsulation strategies have made a major translational impact due to challenges with complexity, cost, limited protection of the AI and poor control of the release of the AI. We have developed a class of silicone particles that addresses these challenges for the encapsulation, protection and controlled release of retinol and other hydrophobic compounds. The particles are prepared by the sol-gel polymerization of silane monomers, which enables their rapid and facile synthesis at scale while maintaining a narrow size distribution (i.e., CV < 20%). We show that our particles can: (i) encapsulate retinol with high efficiency (>85%), (ii) protect retinol from degradation (yielding a half-life 9× greater than unencapsulated retinol) and (iii) slowly release retinol over several hours (at rates from 0.14 to 0.67 μg cm-2 s-1/2). To demonstrate that the controlled release of retinol from the particles can reduce irritation, we performed a double blind study on human subjects and found that formulations containing our particles were 12-23% less irritating than identical formulations containing Microsponge® particles (an industry standard by Amcol, Inc.). To show that the silicone particles can elicit a favorable biological response, similar to the Microsponge® particles, we applied both formulations to reconstructed human epidermal tissues and found an upregulation of keratin 19 (K19) and a downregulation of K10, indicating that the reduced irritation observed in the human study was not caused by reduced activity. We also found a decrease in the production of interleukin-1α (IL-1α) compared to formulations containing the Microsponge particles, suggesting lower irritation levels and supporting the findings from the human study. Finally, we show that the silicone particles can encapsulate other AIs, including betamethasone, N, N-diethyl-meta-toluamide (DEET), homosalate and ingenol mebutate, establishing these particles as a true platform technology.
378. Endogenous Glucose Production and Hormonal Changes in Response to Canagliflozin and Liraglutide Combination Therapy.
作者: Robert Martinez.;Hussein Al-Jobori.;Ali M Ali.;John Adams.;Muhammad Abdul-Ghani.;Curtis Triplitt.;Ralph A DeFronzo.;Eugenio Cersosimo.
来源: Diabetes. 2018年67卷6期1182-1189页
The decrement in plasma glucose concentration with SGLT2 inhibitors (SGLT2i) is blunted by a rise in endogenous glucose production (EGP). We investigated the ability of incretin treatment to offset the EGP increase. Subjects with type 2 diabetes (n = 36) were randomized to 1) canagliflozin (CANA), 2) liraglutide (LIRA), or 3) CANA plus LIRA (CANA/LIRA). EGP was measured with [3-3H]glucose with or without drugs for 360 min. In the pretreatment studies, EGP was comparable and decreased (2.2 ± 0.1 to 1.7 ± 0.2 mg/kg ⋅ min) during a 300- to 360-min period (P < 0.01). The decrement in EGP was attenuated with CANA (2.1 ± 0.1 to 1.9 ± 0.1 mg/kg ⋅ min) and CANA/LIRA (2.2 ± 0.1 to 2.0 ± 0.1 mg/kg ⋅ min), whereas with LIRA it was the same (2.4 ± 0.2 to 1.8 ± 0.2 mg/kg ⋅ min) (all P < 0.05 vs. baseline). After CANA, the fasting plasma insulin concentration decreased (18 ± 2 to 12 ± 2 μU/mL, P < 0.05), while it remained unchanged in LIRA (18 ± 2 vs. 16 ± 2 μU/mL) and CANA/LIRA (17 ± 1 vs. 15 ± 2 μU/mL). Mean plasma glucagon did not change during the pretreatment studies from 0 to 360 min, while it increased with CANA (69 ± 3 to 78 ± 2 pg/mL, P < 0.05), decreased with LIRA (93 ± 6 to 80 ± 6 pg/mL, P < 0.05), and did not change in CANA/LIRA. LIRA prevented the insulin decline and blocked the glucagon rise observed with CANA but did not inhibit the increase in EGP. Factors other than insulin and glucagon contribute to the stimulation of EGP after CANA-induced glucosuria.
379. Short-term effects of T-2 toxin or deoxynivalenol on glutathione status and expression of its regulatory genes in chicken.
作者: Mangesh Nakade.;Csilla Pelyhe.;Benjámin Kövesi.;Krisztián Balogh.;Balázs Kovács.;Judit Szabó-Fodor.;Erika Zándoki.;Miklós Mézes.;Márta Erdélyi.
来源: Acta Vet Hung. 2018年66卷1期28-39页
Short-term (48-hour) effects of 3.74/1.26 mg kg-1 T-2/HT-2 toxin or 16.12 mg kg-1 DON in feed were investigated in the liver of three-week-old cockerels (body weight: 749.60 ± 90.98 g). Markers of lipid peroxidation showed no significant changes. At hour 24, glutathione content in the T-2/HT-2 toxin group was significantly higher than in the control. Glutathione peroxidase activity was significantly higher than the control at hour 24 in the T-2/H-2 toxin group and at hour 48 in the DON group. In the DON group, expression of the glutathione peroxidase 4 gene (GPX4) was significantly lower than in the control at hours 12 and 14, and higher at hour 48. Expression of the glutathione reductase gene (GSR) was significantly lower than in the control at hour 12 in the T-2/HT-2 toxin group, and at hours 12, 24 and 48 in the DON group. However, at hour 36 higher GSR expression was measured in the DON group. Due to the effect of both trichothecenes, expression of the glutathione synthetase gene (GSS) was significantly lower than in the control at hours 24 and 48. In conclusion, T-2/HT-2 toxin and DON had a moderate short-term effect on free radical formation. T-2/HT-2 toxin induced more pronounced activation of the glutathione redox system than did DON.
380. Postprandial glycaemic and lipaemic responses to chronic coffee consumption may be modulated by CYP1A2 polymorphisms.
作者: Tracey M Robertson.;Michael N Clifford.;Simon Penson.;Peter Williams.;M Denise Robertson.
来源: Br J Nutr. 2018年119卷7期792-800页
There is much epidemiological evidence suggesting a reduced risk of development of type 2 diabetes (T2D) in habitual coffee drinkers, however to date there have been few longer-term interventions, directly examining the effects of coffee intake on glucose and lipid metabolism. Previous studies may be confounded by inter-individual variation in caffeine metabolism. Specifically, the rs762551 SNP in the CYP1A2 gene has been demonstrated to influence caffeine metabolism, with carriers of the C allele considered to be of a 'slow' metaboliser phenotype. This study investigated the effects of regular coffee intake on markers of glucose and lipid metabolism in coffee-naïve individuals, with novel analysis by rs762551 genotype. Participants were randomised to either a coffee group (n 19) who consumed four cups/d instant coffee for 12 weeks or a control group (n 8) who remained coffee/caffeine free. Venous blood samples were taken pre- and post-intervention. Primary analysis revealed no significant differences between groups. Analysis of the coffee group by genotype revealed several differences. Before coffee intake, the AC genotype ('slow' caffeine metabolisers, n 9) displayed higher baseline glucose and NEFA than the AA genotype ('fast' caffeine metabolisers, n 10, P<0·05). Post-intervention, reduced postprandial glycaemia and reduced NEFA suppression were observed in the AC genotype, with the opposite result observed in the AA genotype (P<0·05). These observed differences between genotypes warrant further investigation and indicate there may be no one-size-fits-all recommendation with regard to coffee drinking and T2D risk.
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