BACKGROUND: Three isoforms of the neuronal acetylcholine receptors (AChRs) have been described in muscle epsilonAChRs, gammaAChRs and alpha7AChRs. The adult neuromuscular junctions are composed of epsilonAChRs. During immobilization, new AChRs with subunit compositions of gammaAChRs and alpha7AChRs appear in the perijunctional and extrajunctional area. This study evaluated the contribution of these isoforms to neurotransmission during immobilization, by using waglerin-1 which selectively blocks the epsilonAChRs. METHODS: Male mice (n = 20) were used and each group was divided into sham operated or immobilized. A leg was immobilized in mice for 14 days by pinning, after which nerve-evoked twitch tension was examined under anesthesia in tibialis muscle of both legs, with the contralateral leg serving as control. Neuromuscular transmission was monitored by using a peripheral nerve stimulator with the tibialis muscle and sciatic nerve. Electrical stimuli of 0.2 msec duration were applied to sciatic nerve 2 Hz for 2 sec every 30 sec. After administration of waglerin-1, the evoked twitch was recorded. The percent depression of T1 relative to baseline was transformed to probit scale to determine the effective dose of waglerin-1 for 5%, 50%, and 95% twitch depression. RESULTS: The twitch tension in the control group was higher than immobilized group, confirming the efficacy of immobilization. Waglerin-1 produced 99% twitch suppression on the control group. But on the immobilized group, waglerin-1 produced only 70% twitch suppression even at 37 pg. CONCLUSIONS: The functional role of epsilonAChRs in neurotransmission decreases during immobilization while that of gammaAChRs and alpha7AChRs increases.
Adult ; Anesthesia ; Animals ; Depression ; Hindlimb ; Humans ; Immobilization ; Leg ; Male ; Mice ; Muscles ; Neuromuscular Junction ; Neurons ; Peripheral Nerves ; Protein Isoforms ; Receptors, Cholinergic ; Salicylamides ; Sciatic Nerve ; Synaptic Transmission

Abscess ; Breast ; Jaw ; Kidney ; Lung ; Mandible ; Mouth ; Mouth Neoplasms ; Neoplasm Metastasis ; Stomach ; Stomach Neoplasms ; Temporomandibular Joint ; Thyroid Neoplasms

Bone Marrow ; Kidney Transplantation ; Maxilla ; Multiple Myeloma ; Neoplasms, Plasma Cell ; Plasma ; Plasma Cells

Animals ; Bisphosphonate-Associated Osteonecrosis of the Jaw ; Diphosphonates ; Humans ; Ilium ; Imidazoles ; Macrophages ; Maxillary Sinus ; Membranes ; Osteonecrosis ; Periosteum ; Rabbits ; Sodium Chloride ; Transplants

Purpose: To investigate the efficacy and safety of radiofrequency ablation (RFA) for papillary thyroid microcarcinoma (PTMC) after > 10 years of follow-up. Materials and Methods: This study included five patients who underwent RFA to treat PTMCs (five lesions, mean diameter 0.5 cm, range 0.4–0.7 cm) between November 2006 and December 2009. The inclusion criteria were histopathologically confirmed PTMCs, a single PTMC lesion without extrathyroidal extension, no metastasis, and ineligibility or refusal to undergo surgery. RFA was performed by a single radiologist using a radiofrequency generator and an internally cooled electrode. We retrospectively analyzed the procedure-induced complications, serial changes in ablated tumors, recurrence, and local as well as lymph node metastasis based on data obtained from medical records and radiological images. Results: The mean follow-up period was 130.6 months (range 121–159 months). Three patients underwent a single RFA session, and two patients underwent two RFA sessions. We observed no procedure-induced complications. Three tumors completely disappeared after ablation, and ablation of the other two tumors resulted in the formation of a small scar that showed long-term stability (mean duration 16.8 months, range 12–27 months). At the last follow-up, no patient showed recurrence or lymph node metastasis, and serum thyroglobulin levels were within normal limits in all patients. Conclusion RFA may be effective and safe to treat low-risk PTMC in patients who refuse or are ineligible for surgery.

Background: One health is a flexible concept with many facets, including the environment, community, and the nosocomial super-bacteria resistance network. We investigated the molecular prevalence of extended-spectrum-β-lactamase-producing Escherichia coli (ESBL-EC) in workers, livestock, and the farm environment in Korea. Methods: ESBL-EC isolates were obtained from samples from 19 swine farms, 35 retail stores, seven slaughterhouses, and 45 related workers throughout Korea from August 2017 to July 2018, using ChromID ESBL (BioMérieux, Marcy l’Etoile, France) agar and enrichment broth. The presence of ESBL and mobilized colistin resistance (mcr) genes and antimicrobial resistance were determined. Clonality was evaluated with pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST). Results: In total, 232 ESBL-EC isolates were obtained from 1,614 non-duplicated samples (14.4% positive rate). The ESBL-EC isolates showed regional and source-related differences. blaCTX-M-55 (N = 100), blaCTX-M-14 (N = 65), blaCTX-M-15 (N = 33), and blaCTX-M-65 (N = 23) were common ESBL types. The ESBL-EC isolates showed high resistance rates for various antimicrobial classes; however, all isolates were susceptible to carbapenem. One swine-originating colistin-resistant isolate did not carry any known mcr gene. PFGE was successful for 197 of the 232 isolates, and most PFGE types were heterogeneous, except for some dominant PFGE types (O, R, T, U, and V). MLST of 88 isolates was performed for representative PFGE types; however, no dominant sequence type was observed. Conclusions The proportion of ESBL-EC in swine industry-related samples was significant, and the isolates harbored common clinical ESBL gene types. These molecular epidemiologic data could provide important evidence for antimicrobial-resistance control through a one health approach.