Simultaneous determination of steroid drugs in the ointment via magnetic solid phase extraction followed by HPLC-UV

The copper-coated iron oxide nanoparticles with core-shell were produced by deposition of a Cu shell on Fe3 O4 NPs through reduction of Cu2 tions in solution using NaB H4. Subsequently, the organosulfur compound, bis-（2,4,4-trimethylpentyl）-dithiophosphinic acid（b-TMP-DTPA）, was used to form self-assembled monolayer in order to modify sorbent＇s surface via covalent bonding between Cu and thiol（–SH）terminal groups. The prepared magnetic nanoparticles were characterized by using Fourier transform infrared（FT-IR） spectroscopy, scanning electron microscopy（SEM）, transmission electron microscope（TEM）, vibrating sample magnetometer（VSM） and thermo gravimetric analysis（TGA）. Then, the application of this new sorbent was investigated to extract the steroid drugs in ointment samples with the aid of ultrasound. An external magnetic field was applied to collect the magnetic nanoparticles（MNPs）. The extracted analytes were desorbed using acetonitrile. The obtained extraction solution was analyzed by HPLC-UV. The main affecting factors on the extraction efficiency including p H, sonication time, amount of sorbent, salt concentration, and desorption conditions were optimized in detail. Under the optimum conditions, good linearity was obtained in the range of 2.5–250.0 mg/L with reasonable linearity（R24 0.99） and the limits of detection（LODs） ranged between 0.5 and 1.0 mg/L（based on S/N ？ 3）.Repeatability（intra-day precision） based on five replicates and preconcentration factors were calculated to be 3.6%–4.7% and 87–116, respectively. Relative recoveries in ointment samples at two spiked levels of the target analytes were obtained in the range of 90.0%–103.2%. The results illustrated that the Fe3 O4@Cu@ b-TMP-DTPA NPs have the capability of extraction of steroid drugs from ointment samples.

Induction of Tolerance to Non Steroidal Anti Inflammatory Drugs Might Be an Alternative Therapeutic in the Painful Crisis of Sickle Cell Disease

Background and Aims: In Ivoirian’s school, the management of vaso-occlusive painful crisis in sickle cell disease requires non steroidal anti inflammatory drugs (NSAIDs). Although their effectiveness, these drugs may be accompanied by intolerance reactions. When these occur, no codified alternative therapeutic seems to be used to our knowledge. Authors aimed to evaluate the induction of tolerance to NSAIDs as an effective alternative therapeutic. Methods: 22 patients (15 men and 7 women aged from 12 to 39 years with mean age: 22.41 ± 7.88) suffering from vaso-occlusive painful crisis were enrolled. They were known to have a history of sickle cell disease and at least one episode of adverse reactions following the Ibuprofen or Diclofenac intake. A rapid protocol of oral challenge was used in patients to induce tolerance to NSAIDs. The first day, initial doses (8.82 mg for Ibuprofen and 2.20 mg for Diclofenac) were given and gradually increased at intervals of 1 hour over a total period of 6 hours. On the second and third days, the therapeutic dose has been orally administrated with an interval of 6 hours over a period of 12 hours. Results: Despite of some cases of failure that might be related to the severity of symptoms or possible patho-physiological mechanism, more than 80% of patients have successfully tolerated Diclofenac and Ibuprofen. Conclusion: This experience appears to be the first in our context. It might be used as a solution in the lack of alternative therapeutic in the management of vaso-occlusive painful crisis of sickle cell disease as well as in other diseases such as HIV infection where patients often develop intolerance to none alternative antibiotics.

Optimised NSAIDs-loaded Biocompatible Nanoparticles

In this formulation study,biocompatible non steroidal anti-inflammatory(NSAIDs)-loaded nanoparticles were designed as models to be further integrated in a prosthesis surface functionalization.A modified spontaneous emulsion-solvent diffusion methodology was used to produce drug-loaded PLGA nanoparticles without any purification or solvent evaporation requirements.Formulation parameters,such as lactide/glycolide ratio,polymer concentration,solvent/non solvent ratio and non solvent phase,as well as the non ionic tensioactive P188 co-precipitation composition were systematically explored.The optimized formulation(mean size:145 nm,surface charge:-13 m V) was employed to encapsulate various amounts of NSAIDs in a simple and scalable manner.The drug release was characterized in vitro by a complete release for 48 h.These results encourage upcoming preliminary steps for in vivo experiments of prosthesis surface functionalization.

Expression of ICAT and Wnt signaling-related proteins in the monocytic differentiation of HL-60 cells induced by a new steroidal drug NSC67657

Objective To investigate the expression of mRNA and proteins ofβ-catenin,TCF-4(ICAT)and Wnt signaling pathway-related genes in the monocytic differentiation of acute myeloid leukemia HL-60 cells induced by a new steroidal drug NSC67657.Methods Wright’s staining andα-NBE staining were used to observe the differentiation of HL-60 cells after 5 days of

A survey of analgesic and anti-inflammatory drug prescription for oral implant surgery

Aim:This study was conducted to determine the preferred analgesic and anti-inflammatory drugs prescribed by oral implantologists in India.Methods:A structured questionnaire was distributed to 332 dentists to gather information regarding their prescription habits for analgesics and anti-inflammatory drugs.Frequency distributions were computed by type of drug being prescribed and the protocol followed.Results:Analysis of data showed that majority of dentists(85.8%,n=285)prescribed conventional non-steroidal anti-inflammatory drugs(NSAIDs)for implant surgery.The most common prescription was ibuprofen with paracetamol combination(32.2%,n=107)followed by diclofenac(20.2%,n=67).Most dentists reported prescribing different NSAIDs for the same procedure in different patients(64.7%,n=215).Only,35.5%(n=118)followed the peri-operative protocol.Adjunctive prescription of steroids was done by only 33.7%(n=112).Conclusion:Our study illustrates that the general trend of analgesic and anti-inflammatory drug prescription for dental implant surgery among Indian dentists is mostly in accordance with the guidelines for pain management worldwide.However,it is noteworthy that a few dentists do prescribe drugs not primarily indicated for dental pain management and use widely varying protocols for the same.Therefore,in order to avoid potential complications,it is essential to raise awareness of among the dental practitioners of the appropriate indications and dosage regimen of specific drugs.