Month: November 2022

Batista-Silva, Hemily published the artcileRole of bisphenol A on calcium influx and its potential toxicity on the testis of Danio rerio, Synthetic Route of 307510-92-5, the publication is Ecotoxicology and Environmental Safety (2020), 110876, database is CAplus and MEDLINE.

This study investigated the acute in vitro effect of low-concentration bisphenol A (BPA) on calcium (⁴⁵Ca²⁺) influx in zebrafish (Danio rerio) testis and examined whether intracellular Ca²⁺ was involved in the effects of BPA on testicular toxicity. In vitro studies on ⁴⁵Ca²⁺ influx were performed in the testes after incubation with BPA for 30 min. Inhibitors were added 15 min before the addition of ⁴⁵Ca²⁺ and BPA to testes to study the mechanism of action of BPA. The involvement of intracellular calcium from stores on lactate dehydrogenase (LDH) release and on triacylglycerol (TAG) content were carried out after in vitro incubation of testes with BPA for 1 h. Furthermore, gamma-glutamyl transpeptidase (GGT) and aspartate aminotransferase (AST) activities were analyzed in the liver at 1 h after in vitro BPA incubation of D. rerio. Our data show that the acute in vitro treatment of D. rerio testes with BPA at very low concentration activates plasma membrane ionic channels, such as voltage-dependent calcium channels and calcium-dependent chloride channels, and protein kinase C (PKC), which stimulates Ca²⁺ influx. In addition, BPA increased cytosolic Ca²⁺ by activating inositol triphosphate receptor (IP₃R) and inhibiting sarco/endoplasmic reticulum calcium ATPase (SERCA) at the endoplasmic reticulum, contributing to intracellular Ca²⁺ overload.

Ecotoxicology and Environmental Safety published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Synthetic Route of 307510-92-5.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Wang, X. F. published the artcileEffects of a new cystic fibrosis transmembrane conductance regulator inhibitor on Cl^– conductance in human sweat ducts, COA of Formula: C18H10F3NO3S2, the publication is Experimental Physiology (2004), 89(4), 417-425, database is CAplus and MEDLINE.

Effective and specific inhibition of the cystic fibrosis transmembrane conductance regulator (CFTR) Cl^– channel in epithelia has long been needed to better understand the role of anion movements in fluid and electrolyte transport. Until now, available inhibitors have required high concentrations, usually in the millimolar or high micromolar range, to effect even an incomplete block of channel conductance. These inhibitors, including 5-nitro-2(3-phenylpropyl-amino)benzoate (NPPB), bumetamide, glibenclamide and DIDS, are also relatively non-specific. Recently a new anion channel inhibitor, a thiazolidinone derivative, termed CFTR_Inh-172 has been synthesized and introduced with apparently improved inhibitory properties as shown by effects on anion conductance expressed in cell lines and on secretion in vivo. Here, we assay the effect of this inhibitor on a purely salt absorbing native epithelial tissue, the freshly isolated microperfused human sweat duct, known for its inherently high expression of CFTR. We found that the inhibitor at a maximum dose limited by its aqueous solubility of 5 μm partially blocked CFTR when applied to either surface of the membrane; however, it may be somewhat more effective from the cytosolic side (∼70% inhibition). It may also partially inhibit Na⁺ conductance. The inhibition was relatively slow, with a half time for maximum effect of about 3 min, and showed very slow reversibility. Results also suggest that CFTR Cl^– conductance (G_Cl) was blocked in both apical and basal membranes. The inhibitor appears to exert some effect on Na⁺ transport as well.

Experimental Physiology published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C12H10FeO4, COA of Formula: C18H10F3NO3S2.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Perniss, Alexander published the artcileHydrogen sulfide stimulates CFTR in Xenopus oocytes by activation of the cAMP/PKA signalling axis, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is Scientific Reports (2017), 7(1), 1-11, database is CAplus and MEDLINE.

Hydrogen sulfide (H₂S) has been recognized as a signalling mol. which affects the activity of ion channels and transporters in epithelial cells. The cystic fibrosis transmembrane conductance regulator (CFTR) is an epithelial anion channel and a key regulator of electrolyte and fluid homeostasis. In this study, we investigated the regulation of CFTR by H₂S. Human CFTR was heterologously expressed in Xenopus oocytes and its activity was electrophysiol. measured by microelectrode recordings. The H₂S-forming sulfur salt Na₂S as well as the slow-releasing H₂S-liberating compound GYY4137 increased transmembrane currents of CFTR-expressing oocytes. Na₂S had no effect on native, non-injected oocytes. The effect of Na₂S was blocked by the CFTR inhibitor CFTR_inh172, the adenylyl cyclase inhibitor MDL 12330A, and the protein kinase A antagonist cAMPS-Rp. Na₂S potentiated CFTR stimulation by forskolin, but not that by IBMX. Na₂S enhanced CFTR stimulation by membrane-permeable 8Br-cAMP under inhibition of adenylyl cyclase-mediated cAMP production by MDL 12330A. These data indicate that H₂S activates CFTR in Xenopus oocytes by inhibiting phosphodiesterase activity and subsequent stimulation of CFTR by cAMP-dependent protein kinase A. In epithelia, an increased CFTR activity may correspond to a pro-secretory response to H₂S which may be endogenously produced by the epithelium or H₂S-generating microflora.

Scientific Reports published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Recommanded Product: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Deachapunya, Chatsri published the artcileActivation of Chloride Secretion by Isoflavone Genistein in Endometrial Epithelial Cells, Name: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, the publication is Cellular Physiology and Biochemistry (2013), 32(5), 1473-1486, database is CAplus and MEDLINE.

Background /Aim: Genistein, the most active isoflavone found primarily in soybeans, alters ion transport functions in intestinal and airway epithelia. The present study aims to investigate the acute effects and mechanisms of action of genistein in immortalized porcine endometrial epithelial cells. Methods: Ussing chamber technique was used for transepithelial elec. measurements. Results: Genistein increased short-circuit currents (I_sc) which were inhibited by glibenclamide, NPPB, CFTRinh-172, DIDS or bumetanide, but not amiloride. In experiments with amphotericin B-permeabilized monolayers, genistein activated the apical Cl^– current and barium-sensitive basolateral K⁺ current while inhibiting the apical K⁺ current. Genistein failed to increase the I_sc in the presence of forskolin or IBMX, but did increase the I_sc in UTP. Pretreatment with genistein also abolished the increase in the I_sc when induced by forskolin, IBMX or UTP. However, Ca²⁺-chelating BAPTA-AM did not affect the genistein-induced increase in the I_sc. The genistein-stimulated I_sc was reduced by tyrosine kinase inhibitors, tyrphostin A23 or AG490. However, vanadate, a tyrosine phosphatase inhibitor, failed to inhibit the genistein response. Estrogen receptor antagonist ICI182,780 did not alter the genistein’s action. Conclusion: The soy isoflavone, genistein, stimulates Cl^– secretion in endometrial epithelial cells possibly via a direct activation of CFTR which appears to be modulated through a tyrosine kinase-dependent pathway. The present findings may be of benefit for the therapeutic application of genistein in the treatment of electrolyte transport disorders in the epithelia.

Cellular Physiology and Biochemistry published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Name: 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Huang, Yunjie published the artcileElexacaftor/tezacaftor/ivacaftor improved clinical outcomes in a patient with N1303K-CFTR based on in vitro experimental evidence, Synthetic Route of 307510-92-5, the publication is American Journal of Respiratory and Critical Care Medicine (2021), 204(10), 1231-1235, database is CAplus and MEDLINE.

Our study showed that treatment with ETI partially restored N1303K-CFTR expression and increased its function to nearly 40% of the wild-type level (Figure 1). Importantly, we have demonstrated clin. benefit of ETI in a child with N1303K (Figure 2), although the clin. response is slow and modest. Possibly, our patient’s second CFTR allele, E193X, and other genetic and nongenetic factors may contribute to this slow improvement as well.

American Journal of Respiratory and Critical Care Medicine published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, Synthetic Route of 307510-92-5.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Talbi, Khaoula published the artcileCalmodulin-Dependent Regulation of Overexpressed but Not Endogenous TMEM16A Expressed in Airway Epithelial Cells, Category: thiazolidine, the publication is Membranes (Basel, Switzerland) (2021), 11(9), 723, database is CAplus and MEDLINE.

Regulation of the Ca2+-activated Cl- channel TMEM16A by Ca²⁺/calmodulin (CAM) is discussed controversially. In the present study, we compared regulation of TMEM16A by Ca²⁺/calmodulin (holo-CAM), CAM-dependent kinase (CAMKII), and CAM-dependent phosphatase calcineurin in TMEM16A-overexpressing HEK293 cells and TMEM16A expressed endogenously in airway and colonic epithelial cells. The activator of the Ca²⁺/CAM-regulated K⁺ channel KCNN4, 1-EBIO, activated TMEM16A in overexpressing cells, but not in cells with endogenous expression of TMEM16A. Evidence is provided that CAM-interaction with TMEM16A modulates the Ca²⁺ sensitivity of the Cl- channel. Enhanced Ca²⁺ sensitivity of overexpressed TMEM16A explains its activity at basal (non-elevated) intracellular Ca²⁺ levels. The present results correspond well to a recent report that demonstrates a Ca²⁺-unbound form of CAM (apo-CAM) that is pre-associated with TMEM16A and mediates a Ca²⁺-dependent sensitization of activation (and inactivation). However, when using activators or inhibitors for holo-CAM, CAMKII, or calcineurin, we were unable to detect a significant impact of CAM, and limit evidence for regulation by CAM-dependent regulatory proteins on receptor-mediated activation of endogenous TMEM16A in airway or colonic epithelial cells. We propose that regulatory properties of TMEM16A and other members of the TMEM16 family as detected in overexpression studies, should be validated for endogenous TMEM16A and physiol. stimuli such as activation of phospholipase C (PLC)-coupled receptors.

Membranes (Basel, Switzerland) published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C8H8O3, Category: thiazolidine.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Ferreira, Vera F. C. published the artcileTargeting of the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) Protein with a Technetium-99m Imaging Probe, SDS of cas: 307510-92-5, the publication is ChemMedChem (2018), 13(14), 1469-1478, database is CAplus and MEDLINE.

Cystic fibrosis (CF) is caused by mutations in the gene that encodes the CF transmembrane conductance regulator (CFTR) protein. The most common mutation, F508del, leads to almost total absence of CFTR at the plasma membrane, a defect potentially corrected via drug-based therapies. Herein, we report the first proof-of-principle study of a noninvasive imaging probe able to detect CFTR at the plasma membrane. We radiolabeled the CFTR inhibitor, CFTR_inh-172a, with technetium-99m via a pyrazolyl-diamine chelating unit, yielding a novel ^99mTc(CO)₃ complex. A non-radioactive surrogate showed that the structural modifications introduced in the inhibitor did not affect its activity. The radioactive complex was able to detect plasma membrane CFTR, shown by its significantly higher uptake in wild-type vs. mutated cells. Furthermore, assessment of F508del CFTR pharmacol. correction in human cells using the radioactive complex revealed differences in corrector vs. control uptake, recapitulating the biochem. correction observed for the protein.

ChemMedChem published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C18H10F3NO3S2, SDS of cas: 307510-92-5.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Sonawane, N. D. published the artcileIn vivo pharmacology and antidiarrheal efficacy of a thiazolidinone CFTR inhibitor in rodents, Category: thiazolidine, the publication is Journal of Pharmaceutical Sciences (2005), 94(1), 134-143, database is CAplus and MEDLINE.

A small-mol. inhibitor of the cystic fibrosis transmembrane conductance regulator (CFTR), 3-[(3-trifluoromethyl)phenyl]-5-[(4-carboxyphenyl)methylene]-2-thioxo-4-thiazolidinone (CFTR_inh-172), reduces enterotoxin-induced intestinal fluid secretion in rodents. Here, we study CFTR_inh-172 pharmacol. and antidiarrheal efficacy in rodents using ¹⁴C-labeled CFTR_inh-172, liquid chromatog./mass spectrometry, and a closed intestinal loop model of fluid secretion. CFTR_inh-172 was cleared primarily by renal glomerular filtration without chem. modification. CFTR_inh-172 accumulated in liver within 5 min after i.v. infusion in mice, and was concentrated fivefold in bile over blood. At 30-240 min, CFTR_inh-172 was found mainly in liver, intestine, and kidney, with little detectable in the brain, heart, skeletal muscle, or lung. Pharmacokinetic anal. in rats following i.v. bolus infusion showed a distribution volume of 770 mL with redistribution and elimination half-times of 0.14 h and 10.3 h, resp. CFTR_inh-172 was stable in hepatic microsomes. Closed-loop studies in mice indicated that a single i.p. injection of 20 μg CFTR_inh-172 inhibited fluid accumulation at 6 h after cholera toxin by >90% in duodenum and jejunum, ∼60% in ileum and <10% in colon. No toxicity was seen after high-dose CFTR_inh-172 administration (3 mg/kg/day in two daily doses) in mice over the first 6 wk of life. The metabolic stability, enterohepatic recirculation, slow renal elimination, and intestinal accumulation of CFTR_inh-172 account for its efficacy as an antidiarrheal.

Journal of Pharmaceutical Sciences published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C24H26ClNO4, Category: thiazolidine.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Valdivieso, Angel G. published the artcileMeasurement of cystic fibrosis transmembrane conductance regulator activity using fluorescence spectrophotometry, Category: thiazolidine, the publication is Analytical Biochemistry (2011), 418(2), 231-237, database is CAplus and MEDLINE.

Cystic fibrosis (CF) is a frequent autosomal recessive disease caused by mutations that impair the CF transmembrane conductance regulator (CFTR) protein function. CFTR is a chloride channel activated by cAMP via protein kinase A (PKA) and ATP hydrolysis. The authors describe here a method to measure CFTR activity in a monolayer of cultured cells using a fluorescence spectrophotometer and the chloride-sensitive probe 6-methoxy-N-(3-sulfopropyl)quinolinium (SPQ). Modifying a slice holder, the spectrophotometer quartz cuvette was converted in a perfusion chamber, allowing measurement of CFTR activity in real time, in a monolayer of T84 colon carcinoma cells. The SPQ Stern-Volmer constant (K_Cl^–) for chloride in water solution was 115.0±2.8 M^-1, whereas the intracellular K_Cl^– was 17.8±0.8 M^-1, for T84 cells. A functional anal. was performed by measuring CFTR activity in T84 cells. The CFTR transport inhibitors CFTR(inh)-172 (5 μM) and glibenclamide (100 μM) showed a significant reduction (P < 0.05) in CFTR activity. This simple method allows measuring CFTR activity in a very simple, reproducible, and sensitive way.

Analytical Biochemistry published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C13H16O2, Category: thiazolidine.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com

Wang, Xiaofei published the artcilePredominant constitutive CFTR conductance in small airways, Computed Properties of 307510-92-5, the publication is Respiratory Research (2005), 6(1), No pp. given, database is CAplus and MEDLINE.

Background: The pathol. hallmarks of chronic obstructive pulmonary disease (COPD) are inflammation of the small airways (bronchiolitis) and destruction of lung parenchyma (emphysema). These forms of disease arise from chronic prolonged infections, which are usually never present in the normal lung. Despite the fact that primary hygiene and defense of the airways presumably requires a well controlled fluid environment on the surface of the bronchiolar airway, very little is know of the fluid and electrolyte transport properties of airways of less than a few mm diameter Methods: We introduce a novel approach to examine some of these properties in a preparation of minimally traumatized porcine bronchioles of about 1 mm diameter by microperfusing the intact bronchiole. Results: In bilateral isotonic NaCl Ringer solutions, the spontaneous transepithelial potential (TEP; lumen to bath) of the bronchiole was small (mean+sem: -3± mV; n=25), but when gluconate replaced luminal Cl^– the bionic Cl^– diffusion potentials (-58±3 mV; n=25) were as large as -90 mV. TEP diffusion potentials from 2:1 NaCl dilution showed that epithelial Cl^– permeability was at least 5 times greater than Na⁺ permeability. The anion selectivity sequence was similar to that of CFTR. The bionic TEP became more electroneg. with stimulation by luminal forskolin (5 μM)+IBMX (100 μM), ATP (100 μM), or adenosine (100 μM), but not by ionomycin. The TEP was partially inhibited by NPPB (100 μM), GlyH-101* (5-50 μM), and CFTR_Inh-172* (5 μM). RT-PCR gave identifying products for CFTR, α-, β-, and γ-ENaC and NKCCl. Antibodies to CFTR localized specifically to the epithelial cells lining the lumen of the small airways. Conclusion: These results indicate that the small airway of the pig is characterized by a constitutively active Cl^– conductance that is most likely due to CFTR.

Respiratory Research published new progress about 307510-92-5. 307510-92-5 belongs to thiazolidine, auxiliary class Membrane Transporter/Ion Channel,CFTR, name is 4-((4-Oxo-2-thioxo-3-(3-(trifluoromethyl)phenyl)thiazolidin-5-ylidene)methyl)benzoic acid, and the molecular formula is C40H35N7O8, Computed Properties of 307510-92-5.

Referemce:
https://en.wikipedia.org/wiki/Thiazolidine,
Thiazolidine – ScienceDirect.com