keyword
MENU ▼
Read by QxMD icon Read
search

ABCG2

keyword
https://www.readbyqxmd.com/read/28747144/abcg2-c-421c-a-is-associated-with-outcomes-following-severe-traumatic-brain-injury
#1
Solomon M Adams, Yvette P Conley, Dianxu Ren, David O Okonkwo, Ava Puccio, C Edward Dixon, Robert Sb Clark, Patrick M Kochanek, Philip E Empey
Traumatic brain injury (TBI) is a leading cause of death with no pharmacologic treatments that improve outcomes. Transporter proteins participate in TBI recovery by maintaining the CNS biochemical milieu. Genetic variations in transporters that alter expression and/or function have been associated with TBI outcomes. The ATP-binding cassette transporter, ABCG2, is a uric acid (UA) transporter that effluxes UA from cells in the CNS and is responsible for systemic UA clearance. Uric acid is a CNS antioxidant and/or a biomarker that might support TBI recovery...
July 26, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28740143/downregulation-of-alas1-by-nicarbazin-treatment-underlies-the-reduced-synthesis-of-protoporphyrin-ix-in-shell-gland-of-laying-hens
#2
Sami Samiullah, Juliet Roberts, Shu-Biao Wu
Shell colour is an important trait for eggs and an understanding of pigment deposition will assist potential management of egg shell colour loss. We demonstrated that nicarbazin feeding down-regulated ALAS1 and reduced protoporphyrin IX (PP IX) in both shell gland and eggshell, indicating the role of nicarbazin in inhibiting the synthesis of PP IX. Additionally, the expression levels of the genes did not show sequential upregulation in the same order of diurnal time-points (TP) during egg formation. The gene SLC25A38, responsible for transporting glycine from cytoplasm to mitochondria, and the gene ALAS1, encoding rate-limiting enzyme (delta-aminolevulinic acid synthase 1), had higher expression at 15 hr, as compared with 2, 5 and 23...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28735677/genetic-risk-factors-associated-with-antiemetic-efficacy-of-palonosetron-aprepitant-and-dexamethasone-in-japanese-breast-cancer-patients-treated-with-anthracycline-based-chemotherapy
#3
Satoshi Yokoyama, Satoshi Tamaru, Shinya Tamaki, Daisuke Nakanishi, Akiya Mori, Tomokazu Yamakawa, Takaaki Ao, Yasuhiko Sakata, Toshiro Mizuno, Takuya Iwamoto, Kenichi Watanabe, Makoto Simomura, Keiki Kawakami, Naomi Konishi, Shinichi Kageyama, Shoichiro Ohtani, Tomomi Yamada, Susumu Ban, Kazuya Ooi
INTRODUCTION: Breast cancer patients often receive anthracycline-based chemotherapy, and chemotherapy-induced nausea and vomiting (CINV) remains one of the most uncomfortable and distressing adverse reactions. Poor control of CINV reduces the relative dose intensity of chemotherapy agents, which has been associated with poor clinical outcomes and shorter survival. The aim of the present study was to identify genetic risk factors associated with anthracycline-based CINV. PATIENTS AND METHODS: We evaluated CINV attributable to anthracycline-based chemotherapy in Japanese breast cancer patients treated with an antiemetic regimen that included palonosetron, aprepitant, and dexamethasone...
June 29, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28721074/targeted-regulation-of-mir-98-on-e2f1-increases-chemosensitivity-of-leukemia-cells-k562-a02
#4
Yingdan Huang, Xiuli Hong, Jiasheng Hu, Quanyi Lu
BACKGROUND: miRNA is a microRNA that negatively regulates protein expression at post-transcriptional or translational level. It is widely involved in the pathogenesis of tumors. miR-98 belongs to the let-7 family, and its overexpression can increase the sensitivity to drugs in solid cancer cells. However, the function of miR-98 in leukemia is still unclear. In this study, the effect of miR-98 on drug resistance and proliferation of leukemia cells were investigated. METHODS: Real-time quantitative polymerase chain reaction analyzed the expression difference between miR-98 and E2F1 in leukemia cell lines, K562 and K562/A02...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28720764/high-expression-of-abcg2-induced-by-ezh2-disruption-plays-pivotal-roles-in-mds-pathogenesis
#5
Kimihito C Kawabata, Yasutaka Hayashi, Daichi Inoue, Hiroko Meguro, Hiroko Sakurai, Tomofusa Fukuyama, Yosuke Tanaka, Shuhei Asada, Tsuyoshi Fukushima, Reina Nagase, Reina Takeda, Yuka Harada, Jiro Kitaura, Susumu Goyama, Hironori Harada, Hiroyuki Aburatani, Toshio Kitamura
Both proto-oncogenic and tumor-suppressive functions have been reported for EZH2. To investigate the effects of its inactivation, a mutant EZH2 lacking its catalytic domain was prepared (EZH2-dSET). In a mouse bone marrow transplant (BMT) model, EZH2-dSET expression in bone marrow cells (BMCs) induced an MDS-like disease in transplanted mice. Analysis of these mice identified Abcg2 as a direct target of EZH2. Intriguingly, Abcg2 expression alone induced the same disease in the transplanted mice, where stemness genes were enriched...
July 19, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28719598/the-predictive-value-of-abcb1-abcg2-cyp3a4-5-and-cyp2d6-polymorphisms-for-risperidone-and-aripiprazole-plasma-concentrations-and-the-occurrence-of-adverse-drug-reactions
#6
C Rafaniello, M Sessa, F F Bernardi, M Pozzi, S Cheli, D Cattaneo, S Baldelli, M Molteni, R Bernardini, F Rossi, E Clementi, C Bravaccio, S Radice, A Capuano
We investigated in ninety Caucasian pediatric patients the impact of the main polymorphisms occurring in CYP3A, CYP2D6, ABCB1 and ABCG2 genes on second-generation antipsychotics plasma concentrations, and their association with the occurrence of adverse drug reactions. Patients with the CA/AA ABCG2 genotype had a statistically significant lower risperidone plasma concentration/dose ratio (Ct/ds) (P-value: 0.007) and an higher estimated marginal probability of developing metabolism and nutrition disorders as compared to the ABCG2 c...
July 18, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/28712845/dual-inhibitors-of-the-human-blood-brain-barrier-drug-efflux-transporters-p-glycoprotein-and-abcg2-based-on-the-antiviral-azidothymidine
#7
Hilda A Namanja-Magliano, Kelsey Bohn, Neha Agrawal, Meghan E Willoughby, Christine A Hrycyna, Jean Chmielewski
The brain provides a sanctuary site for HIV due, in part, to poor penetration of antiretroviral agents at the blood-brain barrier. This lack of penetration is partially attributed to drug efflux transporters such as P-glycoprotein (P-gp) and ABCG2. Inhibition of both ABCG2 and P-gp is critical for enhancing drug accumulation into the brain. In this work, we have developed a class of homodimers based on the HIV reverse transcriptase inhibitor azidothymidine (AZT) that effectively inhibits P-gp and ABCG2. These agents block transporter mediated efflux of the P-gp substrate calcein-AM and the ABCG2 substrate mitoxantrone...
July 6, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28711141/genomic-influences-on-hyperuricemia-and-gout
#8
REVIEW
Tony Merriman
Genome-wide association studies (GWAS) have identified nearly 30 loci associated with urate concentrations that also influence the subsequent risk of gout. The ABCG2 Q141 K variant is highly likely to be causal and results in internalization of ABCG2, which can be rescued by drugs. Three other GWAS loci contain uric acid transporter genes, which are also highly likely to be causal. However identification of causal genes at other urate loci is challenging. Finally, relatively little is known about the genetic control of progression from hyperuricemia to gout...
August 2017: Rheumatic Diseases Clinics of North America
https://www.readbyqxmd.com/read/28710036/effect-of-polymorphisms-in-transporter-genes-on-dosing-efficacy-and-toxicity-of-maintenance-therapy-in-children-with-acute-lymphoblastic-leukemia
#9
Guillermo Gervasini, Silvia G de Murillo, Mercedes Jiménez, María D de la Maya, Jose M Vagace
The aim of the present work was to assess whether polymorphisms in genes coding for drug transport proteins may influence dosing, efficacy and toxicity of maintenance therapy with methotrexate (MTX) and 6-mercaptopurine (6MP) in childhood acute lymphoblastic leukemia (ALL). A total of 41 children with ALL were screened for 10 SNPs in the SLC19A1, ABCB1, ABCC2, ABCC4 and ABCG2 transporter genes by means of direct sequencing. Carriers of the ABCC4 934CC and ABCB1 1236TT genotypes received a lower percentage of the protocol-recommended starting dose of MTX (62...
July 11, 2017: Gene
https://www.readbyqxmd.com/read/28708399/development-and-validation-of-a-computational-model-ensemble-for-the-early-detection-of-bcrp-abcg2-substrates-during-the-drug-design-stage
#10
Melisa Edith Gantner, Roxana Noemí Peroni, Juan Francisco Morales, María Luisa Villalba, María Esperanza Ruiz, Alan Talevi
Breast Cancer Resistance Protein (BCRP) is an ATP-dependent efflux transporter linked to the multidrug resistance phenomenon in many diseases such as epilepsy and cancer, and a potential source of drug interactions. For those reasons, the early identification of substrates and non-substrates of this transporter during the drug discovery stage is of great interest. We have developed a computational non-linear model ensemble based on conformational independent molecular descriptors using a combined strategy of genetic algorithms, J48 decision tree classifiers and data fusion...
July 14, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28705594/induction-of-abcg2-bcrp-restricts-the-distribution-of-zidovudine-to-the-fetal-brain-in-rats
#11
María Fernanda Filia, Timoteo Marchini, Juan Mauricio Minoia, Martín Ignacio Roma, Fernanda Teresa De Fino, Modesto Carlos Rubio, Guillermo J Copello, Pablo A Evelson, Roxana Noemí Peroni
Safety concerns for fetus development of zidovudine (AZT) administration as prophylaxis of vertical transmission of HIV persist. We evaluated the participation of the ATP-binding cassette efflux transporter ABCG2 in the penetration of AZT into the fetal brain and the relevance for drug safety. Oral daily doses of AZT (60mg/kg body weight) or its vehicle were administered between post gestational days 11 (E11) and 20 (E20) to Sprague-Dawley pregnant rats. At E21, animals received an intravenous bolus of 60mg AZT/kg body weight in the presence or absence of the ABCG2 inhibitor gefitinib (20mg/kg body weight, ip) and AZT in maternal plasma and fetal brain were measured by HPLC-UV...
July 11, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28698656/gene-gene-and-gene-environment-interactions-influence-platinum-based-chemotherapy-response-and-toxicity-in-non-small-cell-lung-cancer-patients
#12
Jia-Jia Cui, Lei-Yun Wang, Tao Zhu, Wei-Jing Gong, Hong-Hao Zhou, Zhao-Qian Liu, Ji-Ye Yin
Platinum-based chemotherapy is a major therapeutic regimen of lung cancer. Various single nucleotide polymorphisms (SNPs) reported were associated with platinum-based chemotherapy response and drug toxicity. However, neither of the studies explored this association from SNP-SNP interaction perspective nor taking into effects of SNP-environment consideration simultaneously. We genotyped 504 polymorphisms and explore the association of gene-gene and gene-environment interactions with platinum-based chemotherapy response and toxicity in 490 NSCLC patients...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28697743/integrative-analysis-of-copy-number-and-gene-expression-in-breast-cancer-using-formalin-fixed-paraffin-embedded-core-biopsy-tissue-a-feasibility-study
#13
Mahesh Iddawela, Oscar Rueda, Jenny Eremin, Oleg Eremin, Jed Cowley, Helena M Earl, Carlos Caldas
BACKGROUND: An absence of reliable molecular markers has hampered individualised breast cancer treatments, and a major limitation for translational research is the lack of fresh tissue. There are, however, abundant banks of formalin-fixed paraffin-embedded (FFPE) tissue. This study evaluated two platforms available for the analysis of DNA copy number and gene expression using FFPE samples. METHODS: The cDNA-mediated annealing, selection, extension, and ligation assay (DASL™) has been developed for gene expression analysis and the Molecular Inversion Probes assay (Oncoscan™), were used for copy number analysis using FFPE tissues...
July 11, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28679589/insulin-stimulates-uric-acid-reabsorption-via-regulating-urate-transporter-1-and-atp-binding-cassette-sub-family-g-member-2
#14
Daigo Toyoki, Shigeru Shibata, Emiko Kuribayashi-Okuma, Ning Xu, Kenichi Ishizawa, Makoto Hosoyamada, Shunya Uchida
Accumulating data indicate that renal uric acid (UA) handling is altered in diabetes and by hypoglycemic agents. In addition, hyperinsulinemia is associated with hyperuricemia and hypouricosuria. However, the underlying mechanisms remain unclear. In this study, we aimed to investigate how diabetes and hypoglycemic agents alter the levels of renal UA transporters. In insulin-depleted diabetic rats with streptozotocin treatment, both UA excretion and fractional excretion of UA (FEUA) were increased, suggesting that tubular handling of UA is altered in this model...
July 5, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28678049/impact-of-abcb1-abcg2-and-cyp3a5-polymorphisms-on-plasma-trough-concentrations-of-apixaban-in-japanese-patients-with-atrial-fibrillation
#15
Satoshi Ueshima, Daiki Hira, Ryo Fujii, Yuuma Kimura, Chiho Tomitsuka, Takuya Yamane, Yohei Tabuchi, Tomoya Ozawa, Hideki Itoh, Minoru Horie, Tomohiro Terada, Toshiya Katsura
OBJECTIVES: During anticoagulant therapy, major bleeding is one of the most severe adverse effects. This study aimed to evaluate the relationships between ABCB1, ABCG2, and CYP3A5 polymorphisms and plasma trough concentrations of apixaban, a direct inhibitor of coagulation factor X. PATIENTS AND METHODS: A total of 70 plasma concentrations of apixaban from 44 Japanese patients with atrial fibrillation were analyzed. In these analyses, the plasma trough concentration/dose (C/D) ratio of apixaban was used as a pharmacokinetic index and all data were stratified according to the presence of ABCB1 (ABCB1 1236C>T, 2677G>T/A, and 3435C>T), ABCG2 (ABCG2 421C>A), and CYP3A5 (CYP3A5*3) polymorphisms...
July 3, 2017: Pharmacogenetics and Genomics
https://www.readbyqxmd.com/read/28677116/ds-8201a-a-new-her2-targeting-antibody-drug-conjugate-incorporating-a-novel-dna-topoisomerase-i-inhibitor-overcomes-her2-positive-gastric-cancer-t-dm1-resistance
#16
Naoki Takegawa, Yoshikane Nonagase, Kimio Yonesaka, Kazuko Sakai, Osamu Maenishi, Yusuke Ogitani, Takao Tamura, Kazuto Nishio, Kazuhiko Nakagawa, Junji Tsurutani
Anti-HER2 therapies are beneficial for patients with HER2-positive breast or gastric cancer. T-DM1 is a HER2-targeting antibody-drug conjugate (ADC) comprising the antibody trastuzumab, a linker, and the tubulin inhibitor DM1. Although effective in treating advanced breast cancer, all patients eventually develop T-DM1 resistance. DS-8201a is a new ADC incorporating an anti-HER2 antibody, a newly developed, enzymatically cleavable peptide linker, and a novel, potent, exatecan-derivative topoisomerase I inhibitor (DXd)...
July 5, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28675750/expression-of-placental-regulatory-genes-is-associated-with-fetal-growth
#17
Maya A Deyssenroth, Qian Li, Marina Lacasaña, Yoko Nomura, Carmen Marsit, Jia Chen
The placenta is the principal organ regulating respiratory, nutritional, endocrine and metabolic functions on behalf of the developing fetus. Changes in gene expression patterns of placenta-specific genes may influence fetal growth. We profiled the expression of 17 genes related to placenta functioning in term placentas (n=677) to identify genes differentially expressed across birth weight categories [small (SGA), appropriate (AGA) and large (LGA) for gestational age]. ABCG2, CEBPB, CRH, GCM1, GPC3, INSL4, PGF and PLAC1 were inversely associated with LGA status, with odds ratios (ORs) and 95% confidence intervals (CI) ranging from GCM1 (OR=0...
July 4, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28667792/phase-i-study-of-salazosulfapyridine-in-combination-with-cisplatin-and-pemetrexed-for-advanced-non-small-cell-lung-cancer
#18
Kohei Otsubo, Kaname Nosaki, Chiyo K Imamura, Hiroaki Ogata, Akitaka Fujita, Shinya Sakata, Fumihiko Hirai, Gouji Toyokawa, Eiji Iwama, Taishi Harada, Takashi Seto, Mitsuhiro Takenoyama, Takeshi Ozeki, Taisei Mushiroda, Mieko Inada, Junji Kishimoto, Kenji Tsuchihashi, Kentaro Suina, Osamu Nagano, Hideyuki Saya, Yoichi Nakanishi, Isamu Okamoto
Spliced variant isoforms of CD44 (CD44v) are a marker of cancer stem cells in solid tumors. They stabilize the xCT subunit of the transporter system xc(-) and thereby promote synthesis of the antioxidant glutathione. Salazosulfapyridine (SASP) is an inhibitor of xCT and suppresses the proliferation of CD44v-positive cancer cells. Chemotherapy-naïve patients with advanced non-squamous non-small-cell lung cancer were enrolled in a dose-escalation study (standard 3 + 3 design) of SASP in combination with cisplatin and pemetrexed...
July 1, 2017: Cancer Science
https://www.readbyqxmd.com/read/28653144/explaining-ethnic-variability-of-transporter-substrate-pharmacokinetics-in-healthy-asian-and-caucasian-subjects-with-allele-frequencies-of-oatp1b1-and-bcrp-a-mechanistic-modeling-analysis
#19
Rui Li, Hugh A Barton
BACKGROUND: Ethnic variability in the pharmacokinetics of organic anion transporting polypeptide (OATP) 1B1 substrates has been observed, but its basis is unclear. A previous study hypothesizes that, without applying an intrinsic ethnic variability in transporter activity, allele frequencies of transporters cannot explain observed ethnic variability in pharmacokinetics. However, this hypothesis contradicts the data collected from compounds that are OATP1B1 substrates but not breast cancer resistance protein (BCRP) substrates...
June 26, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28650568/enhanced-functional-properties-of-human-limbal-stem-cells-by-inhibition-of-the-mir-31-fih-1-p21-axis
#20
Zhiping Liu, Weijiao Zhan, Minzhi Zeng, Jinghong Chen, Huyong Zou, Zhiqun Min
OBJECTIVE: On the basis of the functional roles of the embryonic stem cell niche (ESCN) in the human limbal stem cells (LSCs), we proposed to explore the potential roles of microRNAs in regulating the self-renewal and differentiation of LSCs cultured in the ESCN. METHODS: The LSCs were cultured in different media, either in CnT-20 media or in CnT-20 + 20% ES culture supernatant (ESC-CM). The LSCs cultured in ESC-CM were then transfected with microRNA-31 (miR-31) mimic or antago-31...
June 26, 2017: Acta Ophthalmologica
keyword
keyword
31481
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"