Nanoplasmonic biosensors for multicolor visual analysis of acetylcholinesterase activity and drug inhibitor screening in point-of-care testing.

The monitoring of acetylcholinesterase (AChE) activity and the screening of its inhibitors are significance of the diagnosis and drug therapy of nervous diseases. A metal ions-mediated signal amplification strategy was developed for the highly sensitive and multicolor assay of AChE activity and visually screening its drug inhibitors. After the specific reaction between AChE and acetylthiocholine (ATCh), the hydrolysis product thiocholine (TCh) can directly and decompose the α-FeOOH nanorods (NRs) to release amounts of Fe2+, which was regarded as Fenton reagent to efficiently catalyze H2O2 to produce ·OH. Then, the as-formed ·OH can further largely shorten the gold nanobipyramids (Au NBPs), generating a series of palpable color variations. The linear range for AChE activity was 0.01-500.0 U/L with the limit of detection as low as 0.0074 U/L. The vivid visual effects could be easily distinguished for the multicolor assay of AChE activity by naked eye in visible light. To achieve the point-of-care testing, Au NBPs were further assembled on polymeric electrospun nanofibrous films (ENFs) surface as test strips for the easy-to-use test of AChE activity by RGB values with a smartphone. Fascinatingly, this proposed strategy can be used for the visual screening AChE inhibitors or non-inhibitors. Comparing with the clinical drugs (rivastigmine tartrate, and donepezil), some natural alkaloids such as evodiamine, caffeine, camptothecin, and berberine hydrochloride were selected as inhibitor modes to confirm the drug screening capability of this method. This proposed strategy may have great potential in the other disease-related enzymatic biomarkers assay and the rapid screening of drug therapy.

[Observation on lower back myofascitis treated with penetration needling on yang meridians of the back and electroacupuncture as compared with Western medication].

OBJECTIVE: To compare the difference in the therapeutic effect on lower back myofascitis between the combined therapy of penetration needling on yang meridian of the back and electroacupuncture and the western medication of Ibuprofen capsules, and probe into a better method of treatment for lower back myofascitis. METHODS: Sixty cases of lower back myofascitis were randomly divided into two groups. 30 cases in observation group were treated with penetration needling combined with electroacupuncture on the back shu points on the first line of the Bladder Meridian and the points of the corresponding levels on the Governor Vessel. 30 cases in control group were treated with Ibuprofen capsules. The treatment session was 30 days. The therapeutic effects were compared and the Visual Analog Scales (VAS) and Oswestry disability index were detected before and after treatment in two groups separately. RESULTS: The total effective rate in observation group was 96.7% (29/30), which was superior to that (73.3%, 22/30) in control group. VAS and Oswestry disability index decreased in either group (P < 0.01, P < 0.05). The improvement extent in observation group was superior to that in control group (P < 0.05). CONCLUSION: The therapy of penetration needling on yang meridian of the back combined with electroacupuncture has the advantageous therapeutic effect on lower back myofascitis as compared with the medication of Ibuprofen capsules, which can release pain and improve the functional disturbance effectively.