Analytical Methods for Oxalate Quantification: The Ubiquitous Organic Anion.

Oxalate is a divalent organic anion that affects many biological and commercial processes. It is derived from plant sources, such as spinach, rhubarb, tea, cacao, nuts, and beans, and therefore is commonly found in raw or processed food products. Oxalate can also be made endogenously by humans and other mammals as a byproduct of hepatic enzymatic reactions.

A Copper(II) Macrocycle Complex for Sensing Biologically Relevant Organic Anions in a Competitive Fluorescence Assay: Oxalate Sensor or Urate Sensor?

Fluorescence sensing of oxalate has garnered some attention in the past two decades as a result of this anion's prominence and impact on society. Previous work on oxalate sensors and other divalent anion sensors has led to the conclusion that the sensors are selective for the anion under investigation. However, sensor selectivity is often determined by testing against a relatively small array of "guest" molecules or analytes and studies often exclude potentially interfering compounds.

Akt/survivin pathway inhibition enhances the apoptotic cell death-induced by alpha-santalol in human prostate cancer cells.

We have shown previously that alpha-santalol, a major component of sandalwood oil inhibits growth of cultured prostate cancer cells in vitro by causing apoptosis, but the mechanism of cell death is not fully elucidated. The present study was undertaken to investigate the role of PI3K/Akt/survivin pathway in alpha-santalol-induced apoptosis employing cultured LNCaP and PC-3 human prostate cancer cells. Treatment of prostate cancer cells with alpha-santalol (20, 40 μM) resulted in the down regulation of survivin and p-AKT (s-473) expression and statistically significant reduction in total survivin levels as evidenced by survivin ELISA assay.

Simultaneous expression of ClopHensor and SLC26A3 reveals the nature of endogenous oxalate transport in CHO cells.

ClopHensor, a fluorescent fusion protein, is a dual function biosensor that has been utilized as a tool for the simultaneous measurement of intracellular chloride and pH in cells. ClopHensor has traditionally been used in conjunction with fluorescence microscopy for single cell measurements. Here, we present a promising multi-well format advancement for the use of ClopHensor as a potential high-throughput method capable of measuring fluorescence signal intensity across a well of confluent cells with highly reproducible results.

Alpha-Santalol, a Component of Sandalwood Oil Inhibits Migration of Breast Cancer Cells by Targeting the β-catenin Pathway.

Background/aim: Alpha-santalol, a terpenoid found in sandalwood oil has been shown to inhibit breast cancer cell growth in vitro by inducing apoptosis, but the mechanisms underlying the growth inhibitory effects of alpha-santalol are not fully understood. In this study, we demonstrate that α-santalol treatment targets Wnt/β-catenin pathway to inhibit migration of cultured breast cancer cells.

Materials And Methods: Migration assays, immunoblotting and immunofluorescence were used to examine the mechanism of action of a-santalol in breast cancer cells.

Medicinal properties of alpha-santalol, a naturally occurring constituent of sandalwood oil: review.

Alpha-santalol is a naturally occurring sesquiterpene that is derived from sandalwood oil. Its wide range of health benefits have been attributed to the modulation of various signalling pathways involved in the development of a particular disease. For example, the antitumour and cancer preventive properties of alpha-santalol have been shown to involve cell death induction through apoptosis and cell cycle arrest in various cancer models.

Additive toxic effect of deltamethrin and cadmium on hepatic, hematological, and immunological parameters in mice.

Exposure to natural and man-made environmental toxins concurrently can pose a greater threat to multiple organs. In the present work, we investigated interactions between deltamethrin (DM) and cadmium (Cd), whose mechanisms of action in humans are poorly understood. Albino mice were randomly divided into four groups, each containing six mice: saline as control, DM-treated, cadmium chloride (CdCl)-treated, and CdCl plus DM treated.

Survivin Down-regulation by α-Santalol Is Not Mediated Through PI3K-AKT Pathway in Human Breast Cancer Cells.

Background: α-Santalol, a terpenoid found in sandalwood oil, has been shown to inhibit cancer cell growth in vitro by inducing apoptosis. This study was performed to investigate the anticancer properties of α-santalol associated with the induction of apoptosis in cultured MCF-7 [estrogen receptor (ER)-positive, and wild-type p53)] and MDA-MB-231 (ER-negative and mutant p53) breast cancer cells.

Materials And Methods: Expression of major proteins examined in the study were determined using a standard western blot protocol and analyzed by LICOR-Odyssey infra-red scanner.

Sodium Oxybate for Narcolepsy: Explaining Untoward Effects and Recommending New Approaches in Light of Prevailing Receptor Pharmacology.

Gamma-hydroxybutyrate (GHB) has been an abused and illicit substance for decades, but the antinarcoleptic medication Xyrem (sodium oxybate), the sodium salt of GHB, was approved just in 2002 for increasing wakefulness. We present a case of coma induced by co-ingestion of prescription GHB and ethanol and describe the response to naloxone treatment, by first responders, without evidence of opiate exposure. The purpose of this report is to bridge updated knowledge on GHB and ethanol pharmacology with the clinical sequence of events in a patient co-ingesting these compounds and to theorize on a potentially better pharmacological approach to narcolepsy.

A potential CARB-pharmacophore for antineoplastic activity: part 1.

Diverse functionalized representatives of various classes of sugars, such as thio-, anhydro-, and sulfamido-sugars and myo-inositol oxide, were synthesized and assessed for cytotoxicity against human cancer cell lines (A549, LoVo, MCF-7 and HeLa). The inositol oxide (4) was more active against MCF-7 cells (i.e.

Chemoprevention of prostate cancer by major dietary phytochemicals.

Prostate cancer continues to be one of the most commonly diagnosed diseases and the second leading cause of cancer-related deaths among men in the United States. Options exist to treat localized disease, including surgery, radiation therapy, and hormonal therapy, but clinical management of advanced prostate cancer is challenging. In the past few decades, chemoprevention involving naturally-occurring compounds has emerged as a promising and cost-effective approach to reduce incidence and morbidity of prostate cancer by inhibiting the precancerous events before the occurrence of clinical disease.

Organic anion transporter 3 interacts selectively with lipophilic β-lactam antibiotics.

Transporters are major determinants of the disposition of xenobiotics and endogenous chemicals in the body. Organic anion transporter 3 (Oat3) functions in the kidney and brain to remove metabolic waste, toxins, and drugs, and thus transports diverse chemicals. Some β-lactam antibiotics interact with Oat3, and penicillin G exhibits a strong dependence on Oat3 for renal elimination.

α-Santalol, a derivative of sandalwood oil, induces apoptosis in human prostate cancer cells by causing caspase-3 activation.

The anticancer effects of α-santalol, a major component of sandalwood oil, have been reported against the development of certain cancers such as skin cancer both in vitro and in vivo. The primary objectives of the current study were to investigate the cancer preventive properties of α-santalol on human prostate cancer cells PC-3 (androgen independent and P-53 null) and LNCaP (androgen dependent and P-53 wild-type), and determine the possible mechanisms of its action. The effect of α-santalol on cell viability was determined by trypan blue dye exclusion assay.

Organic anion transporters: discovery, pharmacology, regulation and roles in pathophysiology.

Our understanding of the mechanisms behind inter- and intra-patient variability in drug response is inadequate. Advances in the cytochrome P450 drug metabolizing enzyme field have been remarkable, but those in the drug transporter field have trailed behind. Currently, however, interest in carrier-mediated disposition of pharmacotherapeutics is on a substantial uprise.

Organic anion transporter 3 (oat3/slc22a8) interacts with carboxyfluoroquinolones, and deletion increases systemic exposure to ciprofloxacin.

Carboxyfluoroquinolones, such as ciprofloxacin, are used for the treatment of numerous infectious diseases. Renal secretion is a major determinant of their systemic and urinary concentration, but the specific transporters involved are virtually unknown. In vivo studies implicate the organic anion transporter (OAT) family as a pivotal component of carboxyfluoroquinolone renal secretion.

Organic anion transporter 3 (Oat3/Slc22a8) knockout mice exhibit altered clearance and distribution of penicillin G.

The interaction of renal basolateral organic anion transporter 3 (Oat3) with commonly used pharmacotherapeutics (e.g., NSAIDs, beta-lactams, and methotrexate) has been studied extensively in vitro.

Impaired clearance of methotrexate in organic anion transporter 3 (Slc22a8) knockout mice: a gender specific impact of reduced folates.

Purpose: To elucidate the role of the renal basolateral transporter, Oat3, in the disposition of methotrexate.

Materials And Methods: Chinese hamster ovary cells expressing mouse Oat3 were used to determine kinetics and specificity of inhibition of methotrexate transport. Methotrexate clearance was then examined in vivo in wildtype and Oat3 knockout mice.

Synthesis and pharmacology of ethylphenidate enantiomers: the human transesterification metabolite of methylphenidate and ethanol.

Ethanol elevates methylphenidate (1) plasma concentrations and yields the metabolite ethylphenidate (2). The therapeutic implications are under investigation. The IC(50) for dopamine reuptake inhibition by (+)-2 was 27 nM compared to 367 nM for cocaine and 1730 nM for (-)-2.