Chemical constituents of the leaves of rabbiteye blueberry (Vaccinium ashei) and characterisation of polymeric proanthocyanidins containing phenylpropanoid units and A-type linkages

Chemical constituents of the leaves of rabbiteye blueberry (Vaccinium ashei READE) were investigated in detail. The major phenolic components were caffeoyl quinic acids, flavonol glycosides, flavan-3-ols and proanthocyanidins. Catechins and proanthocyanidins having additional phenylpropanoid units, such as cinchonains, kandelins and mururins, characterised the polyphenols of this plant. Among them, vaccinin A, an isomer of mururin A, was found to be a new compound, and the structure was characterised by spectroscopic methods. The most abundant polyphenols (11.3% of freeze-dried leaves) were oligomeric proanthocyanidins. Thiol degradation with mercaptoethanol indicated that the polymer was constituted of (+)-catechin and (-)-epicatechin as the terminal units and (-)-epicatechin, procyanidin A-2, and cinchonains Ia and Ib as the extension units. Mass spectral analysis suggested the presence of at least dodecamers with A-type linkages and phenylpropanoid moieties

キニナル コドモ オ トラエル シコウ プロセス ノ ケイセイ ホイクシ ニ オコナッタ カンセツテキ シエン ノ ジッセン ホウコク

「気になる子ども」を担当する保育士に対して, 子どもの行動の捉え方や関わり方について, 助言や指導を行う間接的支援を実施した. 支援開始当初, 保育士は子どもの気になる行動に対し直接的に指導し, 保育士が望む行動を促す関わり方が多く見られ, 子どもの気になる行動が助長されていた. しかし, 記録方法の工夫や気になる行動に対する分析の視点を提示していくことで, 保育士は子ども側の視点から気になる行動を捉え, 関わり方にも変化が見られた. 子どもが発達するためには子どもの持っている能力を上手く引き出していくことが重要である. 今回, 間接的支援を通して保育士の関わり方に変化が見られた要因として, 「気になる子ども」の行動を捉える際の保育士の思考プロセスの形成が芽生えたことによるものと考えられた. 【I. はじめに】 数年前までは思春期の問題として注目されていた, キレやすい, 行動に落ち着きがない, 感情コントロールが難しいなどの問題行動を示す子どもが, 近年では幼児期の段階からみられるようになっており, 保育園においても「気になる子ども」として現状報告が数多くされている.We guided him about the way to understand their actions. Before then the nursery teacher grasped their actions superficially and guided them to act as he wanted. As a result the troublesome actions went on increasing. But after w presented the idea of writing down their actions and the viewpoint of analyzing them, the nursery teacher began to change his viewpoint and way to understand their actions. For letting the children grow up, it is important to bring out his latent abilities. The reason why the nursery teacher has changed his attitude to his children seems that the process of thinking of the nursery teacher began to make progress

Can Individuals with Suboptimal Antibody Responses to Conventional Antiviral Vaccines Acquire Adequate Antibodies from SARS-CoV-2 mRNA Vaccination?

In Japan, healthcare workers (HCWs) are vaccinated against measles, rubella, chickenpox, mumps, and hepatitis B to prevent nosocomial infection; however, some do not produce sufficient antibodies (“suboptimal responders”). This study compared immune responses to a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2 mRNA) vaccine among HCWs with normal and suboptimal responses to conventional vaccines. In this prospective cohort study, 50 HCWs received two doses of BNT162b2 mRNA vaccine 3 weeks apart. SARS-CoV-2 anti-spike antibodies were measured 11 times, starting before the first vaccination and ending 5 months after the second vaccination. Antibody titers of four suboptimal and 46 normal responders were compared. SARS-CoV-2 neutralizing antibody activity was measured twice in suboptimal responders, 1 week/1 month and 5 months after the second vaccination. The SARS-CoV-2 anti-spike antibody was detectable in the samples from suboptimal and normal responders at each timepoint after vaccination. Suboptimal responders exhibited SARS-CoV-2 neutralizing antibody activity 1 week/1 month as well as 5 months after the second vaccination; however, activity was slightly reduced at 5 months. Our findings show that suboptimal responders do acquire adequate SARS-CoV-2 anti-spike and SARS-CoV-2 neutralizing antibodies from vaccination to prevent SARS-CoV-2. SARS-CoV-2 mRNA vaccines should thus be recommended for both normal and suboptimal responders to conventional vaccines

Importance of the interferon-α system in murine large intestine indicated by microarray analysis of commensal bacteria-induced immunological changes

Abstract Background Although microbiota play a critical role in the normal development and function of host immune systems, the underlying mechanisms, especially those involved in the large intestine (LI), remain unknown. In the present study, we performed transcriptome analysis of the LI of germ-free (GF) and specific pathogen-free (SPF) mice of the IQI strain, an inbred strain established from ICR mice. Results GeneChip analysis, quantitative real-time RT-PCR, and reconfirmation using bacteria-inoculated GF mice revealed differences in the expression levels of several immune-related genes, such as cryptdin-related sequences (CRS), certain subsets of type 1 interferon (IFN)-related genes, class Ib MHC molecules, and certain complements. LI expressed no authentic cryptdins but predominantly expressed CRS2, 4, and 7. The mRNA levels of IFN-related genes, including Irf7, Isgf3g, Ifit1 and Stat1, were lower in SPF- and flora-reconstituted mice. When an oral IFN-α inducer tilorone analog, R11567DA, was administered to SPF mice, IFN-α was induced rapidly in the LI at 4 h, whereas no IFN-α protein was detected in the small intestine (SI) or blood. In situ hybridization and immunohistochemistry suggested that the IFN-α production originated from Paneth cells in the SI, and portions of lamina proprial CD11b- or mPDCA1-positive cells in the LI. Conclusion The present study suggests that microbial colonization, while inducing the expression of anti-microbial peptides, results in the down-regulation of certain genes responsible for immune responses, especially for type I IFN synthesis. This may reflect the adaptation process of the immune system in the LI to prevent excessive inflammation with respect to continuous microbial exposure. Further, the repertoire of anti-microbial peptides and the extraordinary role of interferon producing cells in the LI have been found to be distinct from those in the SI.</p