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https://www.readbyqxmd.com/read/29334651/effects-of-perinatal-fluoride-exposure-on-the-expressions-of-mir-124-and-mir-132-in-hippocampus-of-mouse-pups
#1
Jixiang Wang, Yuliang Zhang, Zhenzhen Guo, Rui Li, Xingchen Xue, Zilong Sun, Ruiyan Niu
To investigate the effects of perinatal fluoride exposure on learning and memory ability of mouse offspring, ICR female mice were received different doses of sodium fluoride (0, 25, 50, 100 mg/L NaF) from pregnant day 7 to lactational day 21. Pups were exposed to fluoride through the cord blood and breast milk. Open field test showed that compared to the control group, perinatal fluoride exposure significantly decreased the number of entries into the center zone in 100 mg/L NaF group. In the eight-arm maze test, the number of working memory errors, reference memory errors, and the total arm entries were significantly increased in fluoride treatment groups, compared to the control group...
January 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29334319/effect-of-porphyromonas-gingivalis-infection-in-the-placenta-and-umbilical-cord-in-pregnant-mice-with-low-birth-weight
#2
Sayuri Udagawa, Sayaka Katagiri, Shogo Maekawa, Yasuo Takeuchi, Rina Komazaki, Anri Ohtsu, Naoki Sasaki, Takahiko Shiba, Kazuki Watanabe, Kazuyuki Ishihara, Noriko Sato, Naoyuki Miyasaka, Yuichi Izumi
OBJECTIVE: Growing evidence indicates an association between periodontitis and delivery outcome; however, the mechanism is unclear. This study aimed to investigate the influence of Porphyromonas gingivalis (Pg) infection on delivery outcome in mice. MATERIALS AND METHODS: Bacteremia was induced in pregnant Slc:ICR mice (8 weeks old) by intravenous injection of Pg. Mice were randomly divided into a control group (CO), and those receiving Pg injection at gestational day 1 (GD1), gestational day 15 (GD15) or every day (ED)...
January 15, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29331305/tigar-inhibits-ischemia-reperfusion-induced-inflammatory-response-of-astrocytes
#3
Jieyu Chen, Ding-Mei Zhang, Xing Feng, Jian Wang, Yuan-Yuan Qin, Tian Zhang, Qiao Huang, Rui Sheng, Zhong Chen, Mei Li, Zheng-Hong Qin
The inflammatory response of glial cells contributes to neuronal damage or repair after brain ischemia/reperfusion insult. We previously demonstrated a protective role of TP53-induced glycolysis and apoptosis regulator (TIGAR) in ischemic neuronal injury through increasing the flow of pentose phosphate pathway (PPP). The present study investigated the possible role of TIGAR in ischemia/reperfusion-induced inflammatory response of astrocytes. Male ICR mice were subjected to middle cerebral artery occlusion for 2 h followed by 24 h reperfusion and cultured primary astrocytes were subjected to oxygen glucose deprivation for 9 h followed by 24 h reoxygenation (OGD/R)...
January 10, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29328635/adsorption-and-molecular-fractionation-of-dissolved-organic-matter-on-iron-bearing-mineral-matrices-of-varying-crystallinity
#4
Elizabeth K Coward, Tsutomu Ohno, Alain F Plante
Iron (Fe)-bearing mineral phases contribute disproportionately to adsorption of soil organic matter (SOM), due to their elevated chemical reactivity and specific surface area (SSA). However, the spectrum of Fe solid-phase speciation present in oxidation-reduction-active soils challenges analysis of SOM-mineral interactions and may induce differential molecular fractionation of dissolved organic matter (DOM). This work used paired selective dissolution experiments and batch sorption of post-extraction residues to 1) quantify the contributions of Fe-bearing minerals of varying crystallinity to DOM sorption, and 2) characterize molecular fractionation using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS)...
January 12, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29327200/exocyst-complex-member-exoc5-is-required-for-survival-of-hair-cells-and-spiral-ganglion-neurons-and-maintenance-of-hearing
#5
Byeonghyeon Lee, Jeong-In Baek, Hyehyun Min, Seung-Hyun Bae, Kyeonghye Moon, Min-A Kim, Ye-Ri Kim, Ben Fogelgren, Joshua H Lipschutz, Kyu-Yup Lee, Jinwoong Bok, Un-Kyung Kim
The exocyst, an octameric protein complex consisting of Exoc1 through Exoc8, was first determined to regulate exocytosis by targeting vesicles to the plasma membrane in yeast to mice. In addition to this fundamental role, the exocyst complex has been implicated in other cellular processes. In this study, we investigated the role of the exocyst in cochlear development and hearing by targeting EXOC5, a central exocyst component. Deleting Exoc5 in the otic epithelium with widely used Cre lines resulted in early lethality...
January 11, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29325915/in-vivo-nonspecific-immunomodulatory-and-antispasmodic-effects-of-common-purslane-portulaca-oleracea-linn-leaf-extracts-in-icr-mice
#6
Elena S Catap, Markyn Jared L Kho, Maria Rexie R Jimenez
ETHNOPHARMACOLOGICAL RELEVANCE: Portulaca oleracea (common purslane) is used in traditional medicine to cure various illnesses. However, its immune-protective properties and antispasmodic effects still need more pharmacological data if the plant will be utilized in herbal and drug formulations. Therefore, the present study determined the capacity of this plant species to modulate nonspecific immune responses and to confirm its antispasmodic activity in vivo in ICR mice. MATERIALS AND METHODS: Phagocytic activity of peritoneal macrophage, splenic lymphocyte proliferation and plasma lysozyme levels were measured in mice that were immunosuppressed using cyclophosphamide and treated with the ethyl acetate extract of Portulaca oleracea...
January 8, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29323578/effects-of-black-cohosh-and-estrogen-on-core-body-and-tail-skin-temperatures-in-ovariectomized-rats-by-telemetric-monitoring-with-dual-thermistor-probes
#7
Y Sun, L H Qin, X Chen, X Yan, L Mao, W Bai, J Kang
OBJECTIVES: To investigate the effects of black cohosh and estrogen on the temperature in ovariectomized rats, the core body temperature (CBT) and tail-skin temperature (TST) were simultaneously monitored and the relationship between these two temperatures was explored. METHODS: Twenty-four female Sprague-Dawley rats aged 8 weeks were randomly divided into four groups: sham-operated (SHAM), ovariectomized (OVX), OVX treated with estradiol valerate (OVX + E), and OVX treated with isopropanolic black cohosh extract (OVX + ICR)...
January 11, 2018: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/29322537/comparative-evaluations-of-hypertrophic-scar-formation-in-in-vivo-models
#8
Myeongjin Kim, Hyejin Kim, Hyun Wook Kang
BACKGROUND AND OBJECTIVE: Hypertrophic scar (HTS) results from a connective tissue reaction to trauma, inflammation, surgery, or burn on skin. In spite of various techniques for wound generation, the degree of scar in animal models after healing is still unpredictable and less reproducible. The objective of the current study was to identify the appropriate method to create the maximal HTS tissue in a reliable manner by comparing three different methods in vivo. MATERIALS AND METHODS: A 27 ICR mice were tested for the in vivo evaluations...
January 11, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29322008/inhibitory-effects-of-tabernaemontana-divaricata-root-extract-on-oxidative-stress-and-neuronal-loss-induced-by-amyloid-%C3%AE-25-35-peptide-in-mice
#9
Onrawee Khongsombat, Walika Nakdook, Kornkanok Ingkaninan
In Alzheimer's disease, there are numerous amyloid plaques, neurofibrillary tangles, and neuronal loss in several brain areas. Oxidative stress is involved in the mechanisms of Aβ-peptide induced neurotoxicity by the generation of free radical oxidative stress that may lead to neurodegeneration. Tabernaemontana divaricata has various medical properties in Thai folklore medicine including prevent forgetfulness or improve memory. The present study aimed to investigate the effects of T. divaricata root extract (TDE) on Aβ25-35 peptides induced neuronal loss and oxidative stress in mice...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29320174/comprehensive-analysis-of-changes-in-crude-oil-chemical-composition-during-biosouring-and-treatments
#10
Jeremy A Nowak, Pravin Malla Shrestha, Robert Jay Weber, Amy M McKenna, Huan Chen, John D Coates, Allen H Goldstein
Biosouring in crude oil reservoirs by sulfate-reducing microbial communities (SRCs) results in hydrogen sulfide production, precipitation of metal sulfide complexes, increased industrial costs of petroleum production, and exposure issues for personnel. Potential treatment strategies include nitrate or perchlorate injections into reservoirs. Gas chromatography with vacuum ultraviolet ionization and high-resolution time-of-flight mass spectrometry (GC-VUV-HTOF) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) combined with electrospray ionization were applied in this study to identify hydrocarbon degradation patterns and product formations in crude oil samples from biosoured, nitrate treated, and perchlorate treated bioreactor column experiments...
January 10, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29320168/linking-natural-oil-seeps-from-the-gulf-of-mexico-to-their-origin-by-use-of-fourier-transform-ion-cyclotron-resonance-mass-spectrometry
#11
Logan C Krajewski, Vladislav V Lobodin, Caroline Johansen, Tessa E Bartges, Ekaterina V Maksimova, Ian R MacDonald, Alan G Marshall
We report chemical characterization of natural oil seeps from the Gulf of Mexico by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and Gas Chromatography/Atmospheric Pressure Chemical Ionization Mass Spectrometry (GC/APCI-MS), to highlight how FT-ICR MS can also be employed as a means to determine petroleum connectivity, in addition to traditional GC/MS techniques. The source of petroleum is the Green Canyon (GC) 600 lease block in the Gulf of Mexico. Within GC600, two natural oil seepage zones, Mega Plume and Birthday Candles, continuously release hydrocarbons and develop persistent oil slicks at the sea surface above them...
January 10, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29318697/oroxylin-a-inhibits-ethanol-induced-hepatocyte-senescence-via%C3%A2-yap-pathway
#12
Huanhuan Jin, Naqi Lian, Mianli Bian, Chenxi Zhang, Xingran Chen, Jiangjuan Shao, Li Wu, Anping Chen, Qinglong Guo, Feng Zhang, Shizhong Zheng
OBJECTIVES: Oroxylin A, a natural flavonoid isolated from Scutellaria baicalensis, has been reported to have anti-hepatic injury effects. However, the effects of oroxylin A on alcoholic liver disease (ALD) remains unclear. The aim of this study was to elucidate the effects of oroxylin A on ALD and the potential mechanisms. MATERIALS AND METHODS: Male ICR mice and human hepatocyte cell line LO2 were used. Yes-associated protein (YAP) overexpression and knockdown were achieved using plasmid and siRNA technique...
January 10, 2018: Cell Proliferation
https://www.readbyqxmd.com/read/29316558/neural-stem-cells-expressing-bfgf-reduce-brain-damage-and-restore-sensorimotor-function-after-neonatal-hypoxia-ischemia
#13
Qingsong Ye, Yanqing Wu, Jiamin Wu, Shuang Zou, Ali Ahmed Al-Zaazaai, Hongyu Zhang, Hongxue Shi, Ling Xie, Yanlong Liu, Ke Xu, Huacheng He, Fabiao Zhang, Yiming Ji, Yan He, Jian Xiao
BACKGROUND/AIMS: Neonatal hypoxia-ischemia (HI) causes severe brain damage and significantly increases neonatal morbidity and mortality. Increasing evidences have verified that stem cell-based therapy has the potential to rescue the ischemic tissue and restore function via secreting growth factors after HI. Here, we had investigated whether intranasal neural stem cells (NSCs) treatment improves the recovery of neonatal HI, and NSCs overexpressing basic fibroblast growth factor (bFGF) has a better therapeutic effect for recovery than NSCs treatment only...
December 22, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29311486/effect-of-seleno-l-methionine-on-oxidative-stress-in-the-pancreatic-islets-of-a-short-term-induced-diabetic-mouse-model-in-insufficient-selenium-status
#14
Hitoshi Ueno, Ryo Shimizu, Tomofumi Okuno, Hirofumi Ogino, Tomohiro Arakawa, Koichi Murano, Katsuhiko Nakamuro
The protective effects of seleno-L-methionine (SeMet) on oxidative stress in pancreatic islets were investigated with a short-term nicotinamide (NA) and streptozotocin (STZ)-induced diabetic mouse model. ICR mice were intraperitoneally injected twice with 100 mg/kg STZ and 120 mg/kg NA at a 1-d interval and were then orally administered 158 µg Se/kg SeMet with free access to a selenium-deficient diet for 5 weeks. Administration of SeMet significantly improved the levels of glycated hemoglobin (HbA1c), non-fasting and oral glucose tolerance-tested (OGTT) blood glucose, plasma adiponectin and hepatic glycogen that deteriorated by NA/STZ treatment...
2018: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29309894/oxidative-stress-and-apoptosis-in-benzo-a-pyrene-induced-neural-tube-defects
#15
Shanshan Lin, Linlin Wang, Yun Huang, Yuanyuan Wang, Caiyun Wang, Nicholas D E Greene, Aiguo Ren
Neural tube defects (NTDs) are among the most common and severe congenital malformations and result from incomplete closure of the neural tube during early development. Maternal exposure to polycyclic aromatic hydrocarbons (PAHs) has been suggested to be a risk factor for NTDs and previous studies imply that the mechanism underlying the association between PAH exposure and NTDs may involve oxidative stress and apoptosis. The objectives of this study were to investigate whether there is a direct effect of maternal benzo[α] pyrene (BaP) exposure on the closure of the neural tube in mice, and to examine the underlying mechanisms by combining animal experiments and human subject studies...
January 5, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29304285/oligoethyleneoxy-modified-99mtc-labeled-beta-amyloid-imaging-probes-with-improved-brain-pharmacokinetics-for-single-photon-emission-computed-tomography
#16
Xiaoyang Zhang, Yaqin Hou, Cheng Peng, Chu Wang, Xiang Wang, Zhigang Liang, Jing Lu, Baian Chen, Jiapei Dai, Boli Liu, Mengchao Cui
Oligoethyleneoxy linker was introduced for conjugation between 99mTc/Re-bis(aminoethanethiol) (BAT) and β-amyloid (Aβ) binding scaffolds. Rhenium complexes exhibited high to medium binding affinity to Aβ1-42 aggregates and efficient fluorescent staining to Aβ plaques in brain tissue. After radiolabeling, the 99mTc-labeled probes revealed improved brain pharmacokinetics in biodistribution study on normal ICR mice. Probe [99mTc]15 with potent binding affinity (Ki = 13.4 nM) and highest initial brain uptake (2...
January 5, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29303587/voltage-induced-modulation-of-ionic-concentrations-and-ion-current-rectification-in-mesopores-with-highly-charged-pore-walls
#17
Chih-Yuan Lin, Li-Hsien Yeh, Zuzanna S Siwy
It is believed that ion current rectification (ICR), a property which assures preferential ionic transport in one direction, can only be observed in nanopores when the pore size is comparable to the thickness of the electric double layer (EDL). Rectifying nanopores became the basis of biological sensors and components of ionic circuits. Here we report that appreciable ICR can also occur in highly charged conical, polymer mesopores whose tip diameters are as large as 400 nm thus over 100-fold larger than the EDL thickness...
January 5, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29303558/21-tesla-ft-icr-mass-spectrometer-for-ultrahigh-resolution-analysis-of-complex-organic-mixtures
#18
Donald F Smith, David C Podgorski, Ryan P Rodgers, Greg T Blakney, Christopher L Hendrickson
We describe complex organic mixture analysis by 21 tesla (T) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Ultrahigh mass-resolving power (m/Δm50% > 2 700 000 at m/z 400) and mass accuracy (80 ppb rms) enable resolution and confident identification of tens of thousands of unique elemental compositions. We demonstrate 2.2-fold higher mass-resolving power, 2.6-fold better mass measurement accuracy, and 1.3-fold more assigned molecular formulas compared to our custom-built, state-of-the-art 9...
January 5, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29301078/molecular-chemodiversity-of-dissolved-organic-matter-in-paddy-soils
#19
Xiaoming Li, Guo-Xin Sun, Songcan Chen, Zhi Fang, Hai-Yan Yuan, Quan Shi, Yong-Guan Zhu
Organic matter (OM), and dissolved organic matter (DOM), have a major influence upon biogeochemical processes; most significantly, the carbon cycle. To date, very few studies have examined the spatial heterogeneity of DOM in paddy soils. Thus, very little is known about the DOM molecular profiles and the key environmental factors that underpin DOM molecular chemodiversity in paddy soils. Here, Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) was applied to unambiguously resolve 11,361 molecular formulae in 16 paddy soils; thereby elucidating the molecular characteristics of paddy soil DOM...
January 4, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29290627/trim28-regulated-transposon-repression-is-required-for-human-germline-competency-and-not-primed-or-naive-human-pluripotency
#20
Yu Tao, Ming-Ren Yen, Tsotne Chitiashvili, Haruko Nakano, Rachel Kim, Linzi Hosohama, Yao Chang Tan, Atsushi Nakano, Pao-Yang Chen, Amander T Clark
Transition from primed to naive pluripotency is associated with dynamic changes in transposable element (TE) expression and demethylation of imprinting control regions (ICRs). In mouse, ICR methylation and TE expression are each regulated by TRIM28; however, the role of TRIM28 in humans is less clear. Here, we show that a null mutation in TRIM28 causes significant alterations in TE expression in both the naive and primed states of human pluripotency, and phenotypically this has limited effects on self-renewal, instead causing a loss of germline competency...
December 26, 2017: Stem Cell Reports
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