Polysaccharide Nanoparticles from Isatis indigotica Fort. Root Decoction: Diversity, Cytotoxicity, and Antiviral Activity

It has been revealed that numerous nanoparticles are formed during the boiling preparation of traditional Chinese medical decoctions and culinary soups. They may possess physiological effects different from those of constituent components and are worth paying attention to but are barely noticed and investigated as of yet. In this study, six groups of nanoparticles, whose size ranged from 57 to 300 nm, were successfully isolated from the decoction of Isatis indigotica Fort. root, according to their particle size by the means of size-exclusive chromatography. All of the obtained nanoparticles have a high content of polysaccharides, which distinguishes them from the disclosed BLG protein nanoparticles. They also have high similarities in other compositions, surface charge, and stimuli responses. However, four out of these six nanoparticles (F2, F3, F4, and F5) exhibited significant antiviral activity against influenza virus H1N1, and their antiviral activities and cytotoxicity towards MDCK cells varied with their sizes. It suggested that the antiviral efficacy of BLG decoction could also be from its nanoparticles besides its well-known antiviral phytochemicals. It also implied that the biological effects of these polysaccharide nanoparticles, including cytotoxicity and antiviral activity, may be correlative with the physicochemical properties, especially the particle size.

Insomnia diagnosis and management: an osteopathic approach

Insomnia affects a large percentage of American adults and is among the most commonly treated medical conditions in the outpatient clinical setting. The psychological, medical and financial impact of insomnia is substantial. Research indicates that pharmacologic treatment is associated with significant risk, and clinicians should consider other modalities including cognitive behavioral therapy before prescribing medications for the treatment of insomnia. Other complementary treatments including yoga, stress management and traditional Chinese medical therapies are promising, but more research is needed. The osteopathic family physician plays an important role in diagnosis and management. An osteopathic approach to patient care is highly beneficial and includes a multifaceted evaluation when taking a patient history and osteopathic manipulative treatment (OMT) to balance autonomic tone and correct associated somatic dysfunction.

BmK86-P1, a New Degradation Peptide with Desirable Thermostability and Kv1.2 Channel-Specific Activity from Traditional Chinese Scorpion Medicinal Material

Thermally processed Buthus martensii Karsch scorpions are a traditional Chinese medical material for treating various diseases. However, their pharmacological foundation remains unclear. Here, a new degraded peptide of scorpion toxin was identified in Chinese scorpion medicinal material by proteomics. It was named BmK86-P1 and has six conserved cysteine residues. Homology modeling and circular dichroism spectra experiments revealed that BmK86-P1 not only contained representative disulfide bond-stabilized α-helical and β-sheet motifs but also showed remarkable stability at test temperatures from 20–95 °C. Electrophysiology experiments indicated that BmK86-P1 was a highly potent and selective inhibitor of the hKv1.2 channel with IC50 values of 28.5 ± 6.3 nM. Structural and functional dissection revealed that two residues of BmK86-P1 (i.e., Lys19 and Ile21) were the key residues that interacted with the hKv1.2 channel. In addition, channel chimeras and mutagenesis experiments revealed that three amino acids (i.e., Gln357, Val381 and Thr383) of the hKv1.2 channel were responsible for BmK86-P1 selectivity. This research uncovered a new bioactive peptide from traditional Chinese scorpion medicinal material that has desirable thermostability and Kv1.2 channel-specific activity, which strongly suggests that thermally processed scorpions are novel peptide resources for new drug discovery for the Kv1.2 channel-related ataxia and epilepsy diseases.

Audience and Purpose as a Guide to Improve Acceptability and Readability of Technical Translation

Equivalence theory in translation, which is source-text focused, has always been an influential guideline for translators. However, recently, scholars argue that equivalence in translation is not totally possible, and in the author’s opinion, it is not even necessary in many cases in technical communication. In this article, the author tries to approach technical translation guidelines from a different angle, which is purpose an audience-focused. The paper discusses how to improve and evaluate the acceptability or readability of technical translation in terms of the expectations of the audience and the need for the translation purpose. Taking a Traditional Chinese Medical website as an example, the author points out that only by targeting the audience’s needs at the semantic, syntactic, textual, and content levels can a technical translator produce effective technical translations accepted and appreciated by readers.

Bereavement After Patient Deaths Among Chinese Physicians and Nurses: A Qualitative Description Study

In order to achieve an in-depth understanding of professional caregivers’ experiences of bereavement after patient deaths in Mainland China, qualitative description was employed. 24 physicians and nurses from hospitals in Nanjing, China, participated in one-to-one, semi-structured interviews. Thematic analysis was adopted for data analysis. Five themes were generated: the nature of professional bereavement experiences, the meaning of patient deaths, immediate bereavement reactions, long-term changes, and coping strategies. Each theme included personal and professional dimensions. Professional bereavement experiences in Mainland China were found to be influenced by workplace violence against professional caregivers, traditional Chinese medical ethics, the strong death taboo, and inadequacies of the healthcare system. Professional bereavement experiences are meaning-driven, comprehensive, and usually disenfranchised. They involve multidimensional reactions and have both short-term and long-lasting, both event-specific and accumulated impacts. Cultural and systemic factors could shape professional bereavement experiences.