1.Alteration of fatal 1:1 conducted atrial flutter to less conducted ratio by landiolol infusion.
Takata J1, Haruyama N2, Arashi T2, Mae T2. J Anesth. 2016 Apr 16. [Epub ahead of print]
An 84-year-old male patient with a past history of atrial-flutter-fibrillation and dementia underwent an urgent femoral neck fracture surgery. Preoperative electrocardiography demonstrated atrial flutter (AFL) with ventricular conduction at a ratio of 2:1-4:1, and transthoracic echocardiography showed severe left ventricular dysfunction with Ejection Fraction of 14.6 %. Femoral nerve block and Lateral femoral cutaneous nerve block with sedation was planned for the surgery. Upon entry to the operating room, ECG showed 2:1 conducted AFL at the rate of 128 beats min-1. Due to the stimulation of urethral catheter insertion, it has altered to 1:1 conducted AFL. Loading dose of landiolol hydrochloride 7.5 mg followed by 1.5-3 μg/kg/min continuous administration was given, which had decreased the conduction ratio to 2:1 without causing hypotension. A further episode of 1:1 conducted AFL occurred when the pin was inserted to the thighbone, which caused circulatory collapse.
2.Metal complexes of a pentadentate N2O3bis(semicarbazone) Schiff-base. A case study of structure-spectroscopy correlation.
Inoue MH1, Ribeiro RR1, Sabino JR2, Nunes FS3. Spectrochim Acta A Mol Biomol Spectrosc. 2016 Mar 29;164:76-83. doi: 10.1016/j.saa.2016.03.024. [Epub ahead of print]
Schiff condensation of 2,6-diformyl 4-methylphenol with semicarbazide hydrochloride in 1:2 molar ratio produces the bis(semicarbazone) ligand, herein called H3L. A comprehensive spectroscopic analysis of the compound was performed by 1H and 13C NMR, FTIR and electronic spectroscopies. Assignments to the UV-vis spectrum of H3L were supported by semi-empirical quantum mechanics ZINDO/S calculations. The ligand H3L forms monoclinic crystals in the space group P21/c and its structure is stabilized by classic hydrogen bonds with propanone molecules. It promptly reacts with first row metal ions to produce the following coordination compounds: [Co2(L)(μ-NO3)]·DMF, [Ni2(H2L)(μ-CH3COO)(CH3COO)2]·2H2O, [Cu2(L)(μ-NO3)(H2O)2]·H2O, [Cu2(L)(μ-CH3COO)(H2O)2]·H2O and [Cu2(H2L)(μ-Cl)Cl2]·3H2O, that have different compositions, depending on the degree of deprotonation of the ligand upon coordination. Electronic and EPR spectroscopies as well as effective magnetic moment measurements of the complexes were used in an attempt to better understand their mode of coordination, the microsymmetry around the metal ions and magnetic properties.
3.Intravaginal administration of metformin hydrochloride loaded cationic niosomes amalgamated with thermosensitive gel for the treatment of polycystic ovary syndrome: In vitro and in vivo studies.
Saini N1, Sodhi RK2, Bajaj L1, Pandey RS3, Jain UK1, Katare OP4, Madan J5. Colloids Surf B Biointerfaces. 2016 Apr 8;144:161-169. doi: 10.1016/j.colsurfb.2016.04.016. [Epub ahead of print]
BACKGROUND AND OBJECTIVE: Metformin hydrochloride (MTF-HCl) is extensively recommended by physicians for the treatment of polycystic ovary syndrome (PCOS). Mechanistically, MTF-HCl activates AMP-dependent kinase-α (AMPK-α) pathway to decrease the glucose production, enhances fatty acid oxidation and elevates the uptake of glucose in tissues. However, despite favourable physicochemical properties, oral administration of MTF-HCl is associated with impaired bioavailability (50-60%), lactic-acidosis and frequent dosing (500mg 2-3 times a day) in PCOS that ultimately influence the patient compliance. Therefore, in present investigation, MTF-HCl loaded unmodified and cationic small unilamellar niosomes were separately amalgamated with thermosensitive gel (MTF-HCl-SUNs-Gel and MTF-HCl-C-SUNs-Gel) for the treatment of PCOS through vaginal route of administration.
4.A simple route to develop transparent doxorubicin-loaded nanodiamonds/cellulose nanocomposite membranes as potential wound dressings.
Luo X1, Zhang H2, Cao Z2, Cai N2, Xue Y2, Yu F3. Carbohydr Polym. 2016 Jun 5;143:231-8. doi: 10.1016/j.carbpol.2016.01.076. Epub 2016 Feb 2.
The objective of this study is to develop transparent porous nanodiamonds/cellulose nanocomposite membranes with controlled release of doxorubicin for potential applications as wound dressings, which were fabricated by tape casting method from dispersing carboxylated nanodiamonds and dissolving cellulose homogeneously in 7wt% NaOH/12wt% urea aqueous solution. By adjusting the carboxylated nanodiamonds content, various nanocomposite membranes were obtained. The structure and properties of these membranes have been investigated by light transmittance measurements, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), tensile tests, water loss analyses, etc. The drug loading and release was investigated using doxorubicin hydrochloride as a model drug. In vitro cytotoxicity assay of the membranes was also studied. This work presented a proof-of-concept utility of these membranes for loading and release of bioactive compounds to be employed as a candidate for wound dressing.
