Enantiomeric separation of tolperisone and eperisone by reversed-phase HPLC with cellulose tris(3-chloro-4-methylphenylcarbamate)-coated chiral column.

Enantiomeric separations of centrally acting muscle relaxants, that is, tolperisone (TOL) and eperisone (EP), that are marketed as racemates were investigated by reversed-phase high-performance liquid chromatography (HPLC) on a polysaccharide-based chiral column. Both TOL and EP are basic drugs because they contain a tertiary amino group and have similar chemical structures with the exception of the p-methylphenyl and p-ethylphenyl groups in TOL and EP, respectively. A reversed-phase chiral column, that is, a Chiralcel OZ-RH column, which bears cellulose tris(3-chloro-4-methylphenylcarbamate) as the chiral moiety, was effective for the enantiomeric separation of TOL and EP enantiomers. The separation factor and resolution values obtained for TOL were 1.22 and 1.66, respectively, and those for EP were 1.21 and 2.24, respectively, using a 20 mm ammonium acetate in H2 O (pH 8.0 and 7.0, respectively)-CH3 CN (70:30) mobile phase. Using the proposed HPLC conditions, it was found that (R)-TOL eluted faster than (S)-TOL, as revealed by the optical rotation and circular dichroism spectroscopy. In contrast, EP was easily racemized under the experimental conditions, and hence, the elution order was not determined.

HPLC-fluorescence determination of thiol compounds in the serum of human male and female subjects using HILIC-mode column.

High-performance liquid chromatography-fluorescence detection using a hydrophilic interaction chromatography-mode column (ZIC®-HILIC) was used to determine four kinds of thiol compounds in human serum. Sera were obtained from 34 subjects for this study (17 male subjects aged 22-38 years and 17 female subjects aged 18-38 years). Serum cysteine, cysteinylglycine, glutathione, and γ-glutamylcysteine, derivatized with ammonium 7-fluoro-2,1,3-benzoxadiazole-4-sulfonate, were separated on the ZIC®-HILIC column and quantified. The serum concentrations of cysteine, cysteinylglycine, glutathione and γ-glutamylcysteine were 226 ± 4.7, 23.4 ± 1.3, 3.7 ± 0.2 and 3.2 ± 0.1 µm, respectively. In addition, the concentrations of serum thiol compounds from male subjects were significantly higher than those of the female subjects (p < 0.05).

The role of TNF-α in a murine model of Kawasaki disease arteritis induced with a Candida albicans cell wall polysaccharide.

OBJECTIVES: Various inflammatory cytokines, including tumor necrosis factor-α (TNF-α), have been reported to play roles in Kawasaki disease (KD). Recently, anti-TNF-α therapy was reported to show efficacy in patients who do not respond to high-dose intravenous immunoglobulin therapy. However, there are many gaps in our understanding of the role that TNF-α plays in the development of KD arteritis as well as whether anti-TNF-α therapy causes any histological changes in the arteritis. Accordingly, the present histopathological study was carried out to elucidate the inhibitory effect of anti-TNF-α therapy on vasculitis as well as the role of TNF-α in the development of vasculitis in a murine model of KD vasculitis. METHODS: We used two anti-TNF-α drugs (etanercept and infliximab) to treat a Candida albicans-induced murine model of KD vasculitis. We investigated the histopathological changes in terms of the incidence of vasculitis, the scope of lesions and the degree of inflammation. RESULTS: Administration of etanercept to the mice reduced not only the incidence of vasculitis but also the scope of lesions and the degree of inflammation. CONCLUSION: Based on the histological findings, TNF-α is deeply involved in the development of vasculitis.

The Current Status of Utilizing a Medication Record Handbook for Evaluating Shared Medication History: A Retrospective Study Using the Japanese National Claims Database.

While the coronavirus disease 2019 (COVID-19) pandemic has impacted medication adherence and consultation patterns, its effects on the medical practice and dispensary separation system of Japan remain unclear. Thus, the utilization of the medication record handbook (MRH) in both medical and dental areas remains uncertain. This study uses the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB); we analyzed the separation of medication prescription and dispensing in both medicine and dentistry, as well as estimated how much drug information is shared by utilizing a patient-carried MRH. The external prescription (EP) rate was used as the main indicator. We then analyzed the MRH utilization rate during outpatient medication guidance. During the pandemic, there was no distinctive change in the rate of EPs in both medicine and dentistry. Furthermore, an analysis between EPs, medical internal prescriptions (IPs), and dental IPs relative to the MRH utilization rate revealed significant correlations between EPs and medical IPs as well as medical and dental IPs. Conversely, no significant correlation was found between EPs and dental IPs. Therefore, our results suggest that active MRH implementation within healthcare facilities may lead to an increase in its utilization in dentistry.

Organ accumulation in mice after inhalation of single or mixed essential oil compounds.

Essential oils are composed of multiple components. It is thought that the effect of essential oils is due to specific component ratios, which may differ from the original ratio when the essential oil is absorbed. However, very little detailed research exists in this area. We studied the distribution of essential oil components after inhalation of single and mixed components in mice. This research was done using four main components of Alpinia zerumbet (Pers.) B. L. Burtt. and R. M. Sm.: α-pinene, p-cymene, 1,8-cineole, and limonene. After inhalation of single or mixed components for 90 min, component levels in the brain and liver of mice were measured. The results indicated that the amount of α-pinene in the brain and liver was twofold greater after mixed-component inhalation than that after single-component inhalation. In a comparison of the components of the mixed inhalation, the ratio of α-pinene increased to about three times that of 1,8-cineole. It is thought that the absorption via the nasal mucus greatly influences this phenomenon. The results of this investigation of the bodily distribution of essential oil volatile components may provide clues for elucidating their action.

Feasibility of Child-Resistant and Senior-Friendly Press-Through Packages: Potential of Different Materials.

Press-through packaging (PTP) is the most common type of drug packaging in Japan, and a production procedure for PTP has been established at an acceptable cost. However, unknown problems and new needs with regard to safety among users of various age-groups still need to be examined. Considering accident reports involving children and older adults, the safety and quality of PTP and new forms of PTP, such as child-resistant and senior-friendly (CRSF) packaging, should be evaluated. We conducted an ergonomic study on children and older adults to compare types of commonly used PTP and new varieties of PTP. Opening tests were attempted by children and older adults using a common type of PTP (Type A) and child-resistant (CR) PTP (Types B1 and B2) made from soft aluminum foil. The same opening test was conducted on older patients with rheumatoid arthritis (RA). The results showed that CR PTP was difficult for children to open: only 1 out of 18 children could open Type B1. On the other hand, all eight of the older adults could open Type B1, and eight patients with RA could easily open Types B1 and B2. These findings suggest that the quality of CRSF PTP can be improved with the use of new materials.

Quantitative evaluation of the disintegration of orally rapid disintegrating tablets by X-ray computed tomography.

To measure the rapid disintegration of Oral Disintegrating Tablets (ODT), a new test (XCT) was developed using X-ray computing tomography (X-ray CT). Placebo ODT, rapid disintegration candy (RDC) and Gaster®-D-Tablets (GAS) were used as model samples. All these ODTs were used to measure oral disintegration time (DT) in distilled water at 37±2°C by XCT. DTs were affected by the width of mesh screens, and degree to which the tablet holder vibrated from air bubbles. An in-vivo tablet disintegration test was performed for RDC using 11 volunteers. DT by the in-vivo method was significantly longer than that using the conventional tester. The experimental conditions for XCT such as the width of the mesh screen and degree of vibration were adjusted to be consistent with human DT values. Since DTs by the XCT method were almost the same as the human data, this method was able to quantitatively evaluate the rapid disintegration of ODT under the same conditions as inside the oral cavity. The DTs of four commercially available ODTs were comparatively evaluated by the XCT method, conventional tablet disintegration test and in-vivo method.

Evaluation of Newly Designed Blister Packs for Easier Handling to Prevent Pill Dropping.

BACKGROUND: Blister packs with paperboard backing, which is useful for displaying instructions and information, are the most popular type of packaging for osteoporosis drugs in Japan. However, the main users of drugs are the aged, who often find blister packs difficult to open or drop their pills during opening. In this study, we compared different types of blister packs in terms of usability and handling. METHODS: We conducted a subjective and objective study to compare commonly used blister packs with newly designed ones that have a jagged notch designed to hold a pill temporarily and a perforated line that enables the pack to be held easily in one hand. Regarding subjective data, packaging and sensory tests were performed. The participants in the sensory test were healthy older adults and patients with rheumatoid arthritis (RA). We also measured the pinch power of all participants. RESULTS: A comparison of several items, including opening status, prevention of pill dropping, and understanding of the instructions, using a numerical rating scale revealed no significant differences between ordinary (type A) and newly designed (type B) packaging. However, the scores for type B were the same or better than those for type A for every evaluation item. In addition, more than 85% of the participants reported preferring to use type B. More than 80% of the participants in both groups reported dropping pills using type A, which seemed to be related to their preference for type B. In the evaluation by the examiner (objective study), all participants could successfully remove their pills without dropping using type B, including those in the RA group who had difficulty handling packages. CONCLUSION: These findings suggest that the new type of blister pack assessed in this study (type B) is preferable among older and shows promise for a universal design.

Components of essential oils extracted from leaves and shoots of abies species in Japan.

The essential oils extracted from the leaves and the shoots of five Abies species (Pinaceae) growing in Japan, i.e., A. firma, A. homolepis, A. veitchii, A. mariesii, and A. sachalinensis, were characterized by GC-FID and GC/MS analyses. The yields of the essential oils extracted from A. sachalinensis were the highest among them. A significant amount of α-pinene was contained in the essential oils of all the Abies species examined. In A. homolepis and A. veitchii, significant differences in the content of the essential oils were found depending on whether these were extracted from the leaves or from the shoots. Regarding the enantiomeric ratio of α-pinene, the (+)-enantiomer was predominant in the oil extracted from the leaves of A. firma, while (-)-α-pinene was present in higher amounts in the oils of A. veitchii (leaves and shoots), A. mariesii (leaves and shoots), and A. sachalinensis (shoots). The fact that there may be a quantitative and qualitative difference in the components of the essential oils extracted from the different parts of a plant was investigated by cluster analysis.

Amino acid analyses of the exosome-eluted fractions from human serum by HPLC with fluorescence detection.

OBJECTIVES: Amino acid levels in serum or plasma are used for early detection and diagnosis of several diseases. The objective of this study was to analyze amino acid levels in serum exosomes, which have not been previously reported. DESIGN AND METHODS: We investigated the amino acid composition of exosomes from human serum using HPLC with fluorescence detection. RESULTS: The composition ratios of His, Arg, Glu, Cys-Cys, Lys, and Tyr were significantly increased in the exosomes compared with those in the corresponding native serum. d-Ser, an endogenous co-agonist of the N-methyl-d-aspartate receptor, was also enriched in the exosome-eluted fraction. CONCLUSIONS: Our results suggest that certain amino acids are enriched in the exosome-eluted fraction from human serum. These differences could have future diagnostic potential.

Mechanical Role of Nesprin-1-Mediated Nucleus-Actin Filament Binding in Cyclic Stretch-Induced Fibroblast Elongation.

The intracellular mechanical link tethering the nucleus to the cytoskeleton has been suggested to be the linker of the nucleoskeleton and cytoskeleton (LINC) complex. Previous studies have reported that knockdown of nesprin-1, a component of the LINC complex that directly binds to actin filaments, suppresses cellular morphological response to mechanical stimuli. The relation between nesprin-1 knockdown and cellular morphological changes, however, remains unclear. In this study, we examined the mechanical role of nucleus-actin filament binding in morphological changes of fibroblasts exposed to cyclic stretching. After exposure to 10% cyclic stretching for 6 h, fibroblasts transfected with nesprin-1-specific small interfering RNA showed fewer elongated shapes compared with non-transfected cells. To further examine the mechanical role of the nucleus and nucleus-bound actin filaments, we applied cyclic stretching to fibroblasts treated with Trichostatin A (TSA), which decreases nuclear stiffness and thereby reduces nucleus-binding actin filament tension. TSA-treatment was found to induce more rounded cellular shapes than those of non-treated cells under both static and cyclic stretching conditions. These results suggest that the tension of nucleus-bound actin filaments plays an important role in the formation of elongated fibroblasts under cyclic stretching and that nesprin-1 knockdown causes a decrease of tension in nucleus-associated actin filaments.

Determination of free fatty acids in human serum by HPLC with fluorescence detection.

It has been suggested that serum concentrations of polyunsaturated essential fatty acids correlate with the symptoms or severity of various diseases, including depression and Alzheimer-type dementia, and that determination of serum fatty acids might be important for disease diagnosis. Thus, we developed to analyze serum fatty acids in healthy individuals by using a high-performance liquid chromatography method with fluorescence detection, because free fatty acids have a carboxyl group that can be derivatized with a fluorescent reagent, 4-N,N-dimethylaminosulfonyl-7-N-(2-aminoethyl)amino-2,1,3-benzoxadiazole. This approach could quantify five types of free fatty acids [α-linolenic acid (ALA), palmitoleic acid (PLA), arachidonic acid (AA), linoleic acid (LA) and oleic acid (OA)] in human serum. The detection limits of the method were in the range of 2.29-4.75 fmol (signal-to-noise ratio 3), and absolute concentrations of ALA, PLA, AA, LA and OA were 8.27 ± 1.04, 18.8 ± 2.95, 49.9 ± 4.03, 230 ± 18.1 and 201 ± 22.1 µM, respectively.

Determination of sex-based differences in serum γ-linolenic [corrected] acid and dihomo-γ-linolenic [corrected] acid using gas chromatography-mass spectrometry.

Because serum unsaturated fatty acids can provide useful information on disease diagnosis, the simultaneous determination of several fatty acids in small volumes of human serum would be beneficial for clinical applications. In the present study, serum fatty acids were extracted with n-heptane/chloroform from 10µL of serum collected from 26 healthy Japanese subjects (11 men, ages 23-37 years; 15 women, ages 18-37 years) after deproteinization with perchloric acid, derivatization to their methyl ester using p-toluenesulfonic acid as an acid catalyst, and subsequent separation and measurement by gas chromatography-mass spectrometry (GC-MS) in the selected ion monitoring mode. Nine types of fatty acids (palmitoleic acid [PLA], oleic acid [OA], linoleic [corrected] acid [LA], γ-linolenic acid [GLA], α-linolenic acid [ALA], dihomo-GLA [DGLA], arachidonic acid [AA], eicosapentaenoic acid [EPA], and docosahexaenoic acid [DHA]) were analyzed in the serum within 35 min by GC-MS. The concentrations of these fatty acids in serum ranged from 3.64±0.38µM (GLA) to 413±26.3 µM (LA). Among these nine fatty acids, GLA and DGLA levels were significantly lower in women than in men (p=0.0034 and 0.0012, respectively), suggesting that there may be sex-based differences in the biosynthetic production or metabolic processes of GLA and DGLA in humans.

Involvement of reactive oxygen species in the enhancement of membrane lipid peroxidation by sonodynamic therapy with functionalized fullerenes.

BACKGROUND/AIM: Sonodynamic cancer therapy is based on the preferential uptake and/or retention of a sonosensitizing drug (sonosensitizer) in tumor tissues and subsequent activation of the drug by ultrasound irradiation. In the present study, we investigated the participation of lipid peroxidation in the mechanism of the sonodynamically-induced antitumor effect with functionalized fullerenes, such as polyhydroxy fullerene (PHF. MATERIALS AND METHODS: Ultrasonically-induced cell damage and lipid peroxidation with PHF were compared in the same in vitro insonation setup. Sarcoma 180 cells suspended in PBS were exposed to 2 MHz ultrasound in the presence and absence of PHF. Cell viability was determined by the Trypan Blue exclusion test. Lipid peroxidation in cell membranes was estimated by measuring the amount of malondialdehyde as the thiobarbituric acid-reactive-substances. RESULTS: Significant enhancement of the rates of both ultrasonically-induced cell damage and lipid peroxidation was observed in the presence of PHF, both of which were positively correlated with PHF. The enhancement of cell damage and lipid peroxidation with PHF was suppressed by reactive oxygen scavengers such as histidine and tryptophan. CONCLUSION: The good correlation observed in the presence of PHF suggests that membrane lipid peroxidation is one of the important intermediary events in sonodynamically-induced cellular damage. The inhibitory effects of histidine and tryptophan also provide evidence that singlet oxygen plays an important role in PHF-mediated sonosensitization of membranes and that this moiety may be an important mediator of cell destruction in sonodynamic therapy associated with PHF and ultrasound.

Quantitative analyses of schizophrenia-associated metabolites in serum: serum D-lactate levels are negatively correlated with gamma-glutamylcysteine in medicated schizophrenia patients.

The serum levels of several metabolites are significantly altered in schizophrenia patients. In this study, we performed a targeted analysis of 34 candidate metabolites in schizophrenia patients (n = 25) and compared them with those in age- and gender-matched healthy subjects (n = 27). Orthogonal partial least square-discriminant analysis revealed that complete separation between controls and patients was achieved based on these metabolites. We found that the levels of γ-glutamylcysteine (γ-GluCys), linoleic acid, arachidonic acid, D-serine, 3-hydroxybutyrate, glutathione (GSH), 5-hydroxytryptamine, threonine, and tyrosine were significantly lower, while D-lactate, tryptophan, kynurenine, and glutamate levels were significantly higher in schizophrenia patients compared to controls. Using receiver operating characteristics (ROC) curve analysis, the sensitivity, specificity, and the area under curve of γ-GluCys, a precursor of GSH, and D-lactate, a terminal metabolite of methylglyoxal, were 88.00%, 81.48%, and 0.8874, and 88.00%, 77.78%, and 0.8415, respectively. In addition, serum levels of D-lactate were negatively correlated with γ-GluCys levels in patients, but not in controls. The present results suggest that oxidative stress-induced damage may be involved in the pathogenesis of schizophrenia.

Vagus nerve stimulation induced long-lasting enhancement of synaptic transmission and decreased granule cell discharge in the hippocampal dentate gyrus of urethane-anesthetized rats.

Vagus nerve stimulation (VNS) ameliorates deficits of hippocampal functions, such as contextual learning and memory, probably through direct modulation of neuronal activity. Previous studies showed that VNS enhanced excitatory synaptic transmission in the hippocampal CA3 area via activation of ß-adrenergic receptors. However, effects of VNS on excitatory synaptic transmission and action potential (AP) discharge of granule cells (GCs) in the dentate gyrus have not been studied. Urethane-anesthetized rats were used to investigate whether VNS influences synaptic transmission efficacy at perforant path-GC synapses and population spike discharge in the dentate gyrus. Intermittent burst stimulation of the left vagus nerve (30Hz for 30s at an inter-train interval of 5min for 1h) significantly enhanced the perforant path-GC synaptic transmission efficacy in the dentate gyrus for at least 2h, indicating that VNS can induce a long-lasting enhancement of synaptic transmission in this area, similar to the situation observed in the CA3 area. In contrast, a 60-min period of VNS significantly reduced population spike amplitude (a parameter reflecting synchronized AP discharge of GCs) for a given excitatory postsynaptic potential. These findings suggest that acute VNS enhances the excitatory synaptic transmission and reduces synchronized AP discharge of GCs in the dentate gyrus. It is likely that enhancement of excitatory synaptic transmission and reduction of GC excitability contribute VNS treatment efficacy for learning deficits and intractable epilepsy, respectively.

Determination of l-tryptophan and l-kynurenine in Human Serum by using LC-MS after Derivatization with (R)-DBD-PyNCS.

Concentrations of l-tryptophan (l-Trp) and its metabolite, l-kynurenine (l-KYN), in sera of 19 normal subjects (age: 23.6 ± 3.5 y, male: 8, female: 11) were determined by high-performance liquid chromatography with mass-spectrometric detection, following their derivatization with (R)-(-)-4-(N, N-dimethylaminosulfonyl)-7-(3-isothiocyanatopyrrolidin-1-yl)-2,1,3-benzoxadiazole (DBD-PyNCS). A significant positive correlation between l-Trp and l-KYN concentrations was observed (r = 0.532, P < 0.05). Serum l-Trp concentration in male subjects (95.65 ± 4.27 µM) was significantly higher than that in female subjects (79.20 ± 3.34 µM; P < 0.05), while no significant differences in l-KYN concentration or the l-KYN:l-Trp ratio were observed between male and female subjects.

Effects of inhaled lavender essential oil on stress-loaded animals: changes in anxiety-related behavior and expression levels of selected mRNAs and proteins.

Inhalation of various essential oils elicits behavioral changes as a consequence of a complex centrally coordinated response. To understand the molecular mechanisms of action of aromatic compounds on emotional responses, we evaluated the stress-induced changes in mouse brain and the efficacy of inhaled essential oil from Lavandula officinalis (LvEO) using two approaches: a behavioral test, and examining the expression levels of selected genes {fast nerve growth factor receptor (NGFR) mRNA, activity regulated cytoskeletal-associated protein (Arc) mRNA} and proteins {galactokinase 1 (GLK1) and brain-derived neurotrophic factor (BDNF)}. Animals were randomly divided into 4 groups depending on the treatment given: stress (-)/H20, stress (-)/LvEO, stress (+)/H2O, and stress (+)/LvEO group. For behavioral testing, using an elevated plus-maze test, significant anxiolytic-like effects were seen in both the stress (-)/LVEO and stress (+)/LvEO groups, indicating that LvEO exerts anxiolytic-like effects regardless of the administration of water immersion stress. On expression analysis, the levels of NGFR and Arc mRNA were significantly lower in animals subjected to stress. Inhalation of LvEO, however, reversed this change, thus suggesting that LvEO negates the impact of stress on gene expression levels. Meanwhile, significant decreases in expression levels were also observed in the stress (-)/LvEO group, which implies that LvEO, when given in a stress-free situation, may act as a stress stimulus. Taken together, our data suggest that inhalation of LvEO exerts bidirectional influences in the central nervous system (CNS) of animals, either attenuating the effects of stress or acting as a stressor, depending on the subject state.

Interspecies comparison of chemical composition and anxiolytic-like effects of lavender oils upon inhalation.

Essential oils have traditionally been used for decades to alleviate the symptoms of various mental problems. In terms of anxiolytic-like properties, lavender oil is probably the most commonly used and best-studied essential oil. Although there is compositional variance among the oils extracted from different origins, there have been few studies performed to date to investigate how these differences affect the expression of anxiolytic-like activity. This paper discusses the interspecies differences and contributions of the main constituents in the expression of anxiolytic-like effects upon inhalation, as assessed in mice by the elevated-plus maze test, by comparing the essential oils from six different species of Lavandula. The results showed qualitative and quantitative variations in the tested oils, which results in significant differences in their anxiolytic-like activities. Our findings also suggest that linalyl acetate (LA) works synergistically with linalool (LO) and that the presence of both LA and LO is essential for the whole oil to work as an inhaled anti-anxiety agent.