Primary care is the frontline for help-seeking insomnia patients.

BACKGROUND: Although insomnia is a very common disorder, few people seek medical help. OBJECTIVES: To determine the proportion of people who consult a healthcare professional about insomnia and examine reasons for help seeking. METHODS: Descriptive study of 99 patients diagnosed with insomnia following a telephone survey of 466 adults assigned to a primary healthcare unit in Majorca (Spain). Data were obtained from interviews and subsequent review of electronic medical records. RESULTS: Thirty-nine patients (39.8%) consulted at least once with one health care professional; 36(92.2%) consulted a general practitioner. Only 12.2% had an insomnia diagnosis registered in their medical record. Insomnia consultation was not associated with any sociodemographic variables analysed, anxiety, depression or comorbidities. Also, there was no association with sleep quality, duration, and sleep efficiency. Patients with clinical insomnia (OR, 2.48; 95% CI, 1.03-5.94), those who were more worried (OR, 2.93; 95% CI 1.08-7.95) or felt that others noticed the impact of insomnia on their quality of life (OR, 2.48; 95% CI, 1.02-19.08) are more likely to seek medical help. Patients taking sleep medication were 21.54 (95% CI, 7.34-63.20) times more likely to have asked for medical assistance. CONCLUSION: Insomnia is an under-reported problem for both patients and doctors. When patients decide to consult for insomnia problems, they first go to the GP, and the vast majority take medications for their sleep problem. Those who consult most are people with more severe insomnia and those who are more worried.

Hierarchically Imprinted Polymer for Peptide Tag Recognition Based on an Oriented Surface Epitope Approach.

FLAG tag (DYKDDDDK) is a short peptide commonly used for the purification of recombinant proteins. The high price of the affinity columns and their limited reusability are a shortcoming for their widespread use in biotechnology applications. Molecularly imprinted polymers (MIPs) can circumvent some of the limitations of bioaffinity columns for such applications, including long-term stability, reusability, and cost. We report herein the synthesis of MIPs selective to the FLAG tag by hierarchical imprinting. Using the epitope imprinting approach, a 5-amino acid peptide DYKDC was selected as a template and was covalently immobilized on the surface of microporous silica beads, previously functionalized with different aminosilanes, namely, 3-(2-aminoethylamino)propyldimethoxymethylsilane, AEAPMS, and N-(2-aminoethyl)-2,2,4-trimethyl-1-aza-2-silacyclopentane, AETAZS. We investigated the effect of the type of silane on the production of homogeneous silane-grafted layers with the highest extent of silanol condensation as possible using 29Si CP/MAS NMR. We observed that the right orientation of the imprinted cavities can substantially improve analyte recoveries from the MIP. After template and silica removal, the DYKDC-MIPs were used as sorbents for solid-phase extraction (molecularly imprinted solid-phase extraction) of the FLAG peptide, showing that the polymer prepared with AETAZS-bound silica beads contained binding sites more selective to the tag (RMIP-AZA = 87.4% vs RNIP-AZA = 4.1%, n = 3, RSD ≤ 4.2%) than those prepared using AEAPMS (RMIP-DM = 73.4% vs RNIP-DM = 23.2%, n = 3, RSD ≤ 4.0%) as a functionalization agent. An extensive computational molecular modeling study was also conducted, shedding some light on the interaction mechanism between the FLAG peptide and the imprinted template in the binding cavities.

Nanoparticle-Directed Metal-Organic Framework/Porous Organic Polymer Monolithic Supports for Flow-Based Applications.

A two-step nanoparticle-directed route for the preparation of macroporous polymer monoliths for which the pore surface is covered with a metal-organic framework (MOF) coating has been developed to facilitate the use of MOFs in flow-based applications. The flow-through monolithic matrix was prepared in a column format from a polymerization mixture containing ZnO-nanoparticles. These nanoparticles embedded in the precursor monolith were converted to MOF coatings via the dissolution-precipitation equilibrium after filling the pores of the monolith with a solution of the organic linker. Pore surface coverage with the microporous zeolitic imidazolate framework ZIF-8 resulted in an increase in surface area from 72 to 273 m2 g-1. Monolithic polymer containing ZIF-8 coating was implemented as a microreactor catalyzing the Knoevenagel condensation reaction and also in extraction column format enabling the preconcentration of trace levels of toxic chlorophenols in environmental waters. Our approach can be readily adapted to other polymers and MOFs thus enabling development of systems for flow-based MOF applications.