Application of a new pH-sensitive fluoroprobe (carboxy-SNARF-1) for intracellular pH measurement in small, isolated cells

1990 ◽  
Vol 417 (2) ◽  
pp. 234-239 ◽  
Author(s):  
K. J. Buckler ◽  
R. D. Vaughan-Jones
Keyword(s):  
Intracellular Ph ◽  
Ph Sensitive ◽  
Ph Measurement ◽  
Isolated Cells

scholarly journals 3P180 Intracellular pH measurement of Salmonella with a pH-sensitive GFP, pHluorin, and a newly developed pH imaging system(Molecular motors,Poster Presentations)

2007 ◽  
Vol 47 (supplement) ◽  
pp. S248
Author(s):  
Yusuke Morimoto ◽  
Yong-Suk Che ◽  
Tohru Minamino ◽  
Nobunori Kami-ike ◽  
Keiichi Namba
Keyword(s):  
Intracellular Ph ◽  
Molecular Motors ◽  
Imaging System ◽  
Ph Sensitive ◽  
Ph Measurement ◽  
Ph Imaging ◽  
Poster Presentations

LONG TERM EFFECTS OF THYROID STIMULATING HORMONE AND INSULIN ON INTRACELLULAR pH IN FRTL-5 CELLS

1992 ◽  
Vol 133 (2) ◽  
pp. R9-R11
Author(s):  
A.M. Wood ◽  
S.P. Bidey ◽  
J. Soden ◽  
W.R. Robertson
Keyword(s):  
Intracellular Ph ◽  
Small Groups ◽  
Thyroid Stimulating Hormone ◽  
Ph Sensitive ◽  
Long Term Effects ◽  
Bicarbonate Ions ◽  
Chronic Effects ◽  
Petri Dishes ◽  
Presence And Absence

ABSTRACT We have studied the chronic effects of TSH (100μU/ml) and insulin (10μg/ml) on intracellular pH (pHi) in FRTL-5 cells using the pH sensitive probe 2′7-bis (2-carboxyethyl-5′-6′) carboxyfluorescein. FRTL-5 cells were cultured on Petri dishes either in the presence of 4H, ie. Coons F-12 containing cortisol (10nM), transferrin (0.5μg/ml), glycyl-histidyl lysine acetate (10ng/ml) and somatostatin (10μg/ml), or with 4H+insulin (5H), 4H+TSH, or 4H+TSH+insulin (6H). pHi was measured in small groups of cells by microspectrofluorimetry both in the presence and absence of bicarbonate ions after cells had been deprived of serum for at least a day. In

Intracellular pH-Sensitive PEG-block-Acetalated-Dextrans as Efficient Drug Delivery Platforms

2013 ◽  
Vol 5 (21) ◽  
pp. 10760-10766 ◽  
Author(s):  
Zhe Zhang ◽  
Xiaofei Chen ◽  
Li Chen ◽  
Shuangjiang Yu ◽  
Yue Cao ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Intracellular Ph ◽  
Ph Sensitive

Design and validation of a new ratiometric intracellular pH imaging probe using lanthanide-doped upconverting nanoparticles

2017 ◽  
Vol 46 (40) ◽  
pp. 13957-13965 ◽  
Author(s):  
Shuoren Du ◽  
Javier Hernández-Gil ◽  
Hao Dong ◽  
Xiaoyu Zheng ◽  
Guangming Lyu ◽  
...  
Keyword(s):  
Intracellular Ph ◽  
Quantitative Imaging ◽  
Living Cells ◽  
Ph Sensitive ◽  
Upconversion Nanoparticles ◽  
Imaging Probe ◽  
Ph Imaging ◽  
Ratiometric Probe ◽  
Subcellular Level

A ratiometric probe based on upconversion nanoparticles modified with a pH sensitive moiety for the quantitative imaging of pH at the subcellular level in living cells.

A pH-responsive amphiphilic chitosan–pyranine core–shell nanoparticle for controlled drug delivery, imaging and intracellular pH measurement

2014 ◽  
Vol 2 (38) ◽  
pp. 6580-6589 ◽  
Author(s):  
Hao-Syun Chou ◽  
Meng-Hsuan Hsiao ◽  
Wei-Yang Hung ◽  
Tin-Yo Yen ◽  
Hui-Yi Lin ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Intracellular Ph ◽  
Controlled Drug Delivery ◽  
Ph Measurement ◽  
Core Shell ◽  
Ph Responsive ◽  
Cellular Resolution ◽  
New Type

A new type of CHC–PY core–shell nanoparticle provides multiple functionality, where a synergistic performance of nanotherapeutics, imaging and even diagnosis at a cellular resolution can be achieved simultaneously.

Regulation of intracellular pH in proximal tubules of avian long-looped mammalian-type nephrons

1998 ◽  
Vol 274 (6) ◽  
pp. R1526-R1535 ◽  
Author(s):  
Olga H. Brokl ◽  
Christina L. Martinez ◽  
Apichai Shuprisha ◽  
Diane E. Abbott ◽  
William H. Dantzler
Keyword(s):  
Intracellular Ph ◽  
Ph Sensitive ◽  
Fluorescent Dye ◽  
Proximal Tubules ◽  
Acid Base ◽  
Rate Of Recovery

In nonperfused proximal tubules isolated from chicken long-looped mammalian-type nephrons, intracellular pH (pHi), measured with the pH-sensitive fluorescent dye 2′,7′-bis(2-carboxyethyl)-5(6)-carboxyfluorescein, was ∼7.3 under control conditions (HEPES-buffered medium with pH 7.4 at 37°C) and was reduced to ∼7.0 in response to NH4Cl pulse. The rate of recovery of pHi from this level to the resting level was 1) significantly reduced by the removal of Na+ from the bath, 2) significantly increased by the removal of Cl− from the bath, 3) unchanged by the removal of both Na+ and Cl− from the bath, 4) significantly reduced by the addition of either ethylisopropylamiloride or DIDS to the bath, 5) significantly increased by a high bath K+ concentration, and 6) unchanged by the addition of Ba2+ to the bath. These data suggest that both Na+-coupled and Cl−-coupled basolateral acid-base fluxes are involved in determining the rate of recovery of pHi after acidification. The most likely ones to be important in regulating pHi are a Na+/H+exchanger and a Na+-coupled Cl−/[Formula: see text]exchanger. In birds, long-looped mammalian-type nephrons resemble short-looped transitional nephrons but differ markedly from superficial loopless reptilian-type nephrons.

Novel near-infrared pH-sensitive cyanine-based fluorescent probes for intracellular pH monitoring

2019 ◽  
Vol 170 ◽  
pp. 107612 ◽  
Author(s):  
Di Jin ◽  
Bowei Wang ◽  
Yuqing Hou ◽  
Yuchao Du ◽  
Xue Li ◽  
...  
Keyword(s):  
Intracellular Ph ◽  
Fluorescent Probes ◽  
Near Infrared ◽  
Ph Monitoring ◽  
Ph Sensitive

pH-sensitive, dynamic graft polymer micelles via simple synthesis for enhanced chemotherapeutic efficacy

2019 ◽  
Vol 34 (8) ◽  
pp. 1059-1070
Author(s):  
Dapeng Li ◽  
Jiejie Qin ◽  
Min Sun ◽  
Guoqing Yan ◽  
Rupei Tang
Keyword(s):  
Intracellular Ph ◽  
Ph Value ◽  
Ph Sensitive ◽  
Drug Accumulation ◽  
Simple Synthesis ◽  
Hydroxyl Groups ◽  
Graft Polymer ◽  
Polymer Micelles ◽  
Chemotherapeutic Efficacy

To promote chemotherapeutic efficacy and easier clinical transformation, a series of pH-sensitive and dynamic drug delivery systems with facile two-step synthesis and simple structure have been successfully constructed by the tunable grafting reaction between pH-sensitive ortho ester and poly(vinyl alcohol). The amphipathic graft macromolecules (PVA- g-OE x, x represents the percentage of feed between ortho esters and hydroxyl groups of polyvinyl alcohol) could self-assemble into micelles and doxorubicin was embedded. These micelles exhibited pH-sensitivity to both extracellular and intracellular pH and demonstrated the following characteristics: (i) maintaining long-term storage and blood circulation stability at pH 7.4; (ii) responding to tumoral extracellular pH value following gradually larger nanoparticles for improved drug accumulation and retention; (iii) being sensitive to tumoral intracellular pH value following disintegration for rapid drug release to improve toxicity to tumor cells. Moreover, the doxorubicin-loaded micelle (PVA- g-OE30-DOX) showed similar cytotoxicity to free doxorubicin in vitro, but stronger tumor penetration and inhibition ability in vitro human liver carcinoma cell line multicellular tumor spheroids. In vivo biodistribution and tumor inhibition examinations demonstrated that PVA- g-OE30-DOX had more superior efficacy in significantly enhancing drug accumulation in tumor, restraining tumor growth while decreasing drug concentration in normal tissues. The pH-sensitive, dynamic graft polymer micelles via simple synthesis could be considered as a promising and effective drug carrier in tumor therapy.

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