Elsevier BVActa Medica Okayama2667-2421182025Postnatal expression of Cat-315-positive perineuronal nets in the SAMP10 mouse primary somatosensory cortex244256ENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareYuTakahashiDepartment of Psychiatry, Kawasaki Medical SchoolSachikoMoriDepartment of Psychiatry, Kawasaki Medical SchoolErikoKitanoDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolPerineuronal nets (PNNs) form at the end of the critical period of plasticity in the mouse primary somatosensory cortex. PNNs are said to have functions that control neuroplasticity and provide neuroprotection. However, it is not clear which molecules in PNNs have these functions. We have previously reported that Cat-315-positive molecules were not expressed in the PNNs of the senescence-accelerated model (SAM)P10 strain model mice at 12 months of age. To confirm whether the loss of Cat-315-positive molecules occurred early in life in SAMP10 mice, we examined Cat-315-positive PNNs in the primary somatosensory cortex during postnatal development. This research helps to elucidate the function of PNNs and the mechanism of cognitive decline associated with ageing. To confirm whether Cat-315-positive PNNs changed in an age-dependent manner in SAMP10 mice, we examined the primary somatosensory cortex at 21, 28, and 56 days after birth. We compared these results with those of senescence-accelerated mouse-resistant (SAMR) mice. In SAMP10 mice, Cat-315-positive PNNs were expressed in the primary somatosensory cortex early after birth, but their expression was significantly lower than that in SAMR1 mice. Many other molecules that calibrated the PNN were unchanged between SAMP10 and SAMR1 mice. This study revealed that the expression of the Cat-315 epitope was decreased in the primary somatosensory cortex of SAMP10 mice during postnatal development. SAMP10 mice have had histological abnormalities in their brains since early life. Furthermore, using SAMP10 will be useful in elucidating the mechanism of age-related abnormalities in brain function as well as in elucidating the function and structure of PNNs.No potential conflict of interest relevant to this article was reported.Walter de Gruyter GmbHActa Medica Okayama2081-69361612025Age-related behavioural abnormalities in C57BL/6.KOR–Apoe shl miceENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareYuTakahashiDepartment of Psychiatry, Kawasaki Medical SchoolSachikoMoriDepartment of Psychiatry, Kawasaki Medical SchoolErikoKitanoDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolTetsujiMiyazakiDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolSpontaneously hyperlipidaemic (Apoeshl) mice were discovered in 1999 as mice lacking apolipoprotein E (ApoE) owing to a mutation in the Apoe gene. However, age-related behavioural changes in commercially available Apoeshl mice have not yet been clarified. The behavioural abnormalities of ApoE-deficient mice, which are genetically modified mice artificially deficient in ApoE, have been investigated in detail, and it has been reported that they can serve as a model of Alzheimer’s disease (AD). To understand whether Apoeshl mice can also serve as a murine model of AD, it is necessary to investigate age-related behavioural abnormalities in Apoeshl mice. In this study, we conducted a series of behavioural experiments on 7- and 11-month-old Apoeshl mice to investigate the behavioural abnormalities associated with ageing in Apoeshl mice. In this study, 7-month-old Apoeshl mice showed decreased body weight and grip strength compared to age-matched wild-type mice. In the open field test, 7-month-old Apoeshl mice showed increased anxiety-like behaviour compared to wild-type mice, whereas 11-month-old Apoeshl mice showed decreased anxiety-like behaviour. Moreover, Apoeshl mice aged 7 and 11 months had increased serum cholesterol levels. These results indicate that the behaviour of Apoeshl mice changes with age. However, 11-month-old Apoeshl mice did not show a decline in cognitive function or memory ability similar to murine models of AD. Our findings indicate that Apoeshl mice can be used to investigate the function of ApoE in the central nervous system.No potential conflict of interest relevant to this article was reported.Walter de Gruyter GmbHActa Medica Okayama2081-69361612025Rearing in an envy-like environment increases anxiety-like behaviour in miceENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareErikoKitanoDepartment of Psychiatry, Kawasaki Medical SchoolYuTakahashiDepartment of Psychiatry, Kawasaki Medical SchoolSachikoMoriDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolInterest in the societal and psychological harm caused by widespread envy and social comparison is increasing. Envy is associated with anxiety and depression, though the mechanism by which envy affects neuropsychiatric disorders, such as depression, remains unclear. Clarifying the neurobiological basis of envy’s effects on behaviour and emotion regulation in experimental mice is essential for developing disease-prevention and treatment strategies. As mice recognize other mice in neighbouring cages, this study investigated whether they recognize neighbouring cages housed in environmentally enriched cages and suffer psychological stress due to envy. After being raised in an envy-like environment for 3 weeks, we revealed changes in the behaviour of the mice through a series of behavioural experiments. Mice raised in an envious environment showed increased body weight and anxiety-like behaviour but decreased social behaviour and serum corticosterone levels compared to control mice. Thus, mice recognize their neighbouring cages and experience psychological stress due to envy. This study revealed a part of the scientific basis for why envy increased anxiety. Using this novel experimental breeding environment, it may be possible to create an experimental animal model of anxiety disorders.No potential conflict of interest relevant to this article was reported.WileyActa Medica Okayama0953-418020242024Mice Recognise Mice in Neighbouring Rearing Cages and Change Their Social Behaviour9215607ENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareYuTakahashiDepartment of Psychiatry, Kawasaki Medical SchoolSachikoMoriDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolMice are social animals that change their behaviour primarily in response to visual, olfactory, and auditory information from conspecifics. Rearing conditions such as cage size and colour are important factors influencing mouse behaviour. In recent years, transparent plastic cages have become standard breeding cages. The advantage of using a transparent cage is that the experimenter can observe the mouse from outside the cage without touching the cage. However, mice may recognise the environment outside the cage and change their behaviour. We speculated that mice housed in transparent cages might recognise mice in neighbouring cages. We used only male mice in this experiment. C57BL/6 mice were kept in transparent rearing cages with open lids, and the cage positions were maintained for 3 weeks. Subsequently, we examined how mice behaved toward cagemate mice, mice from neighbouring cages, and mice from distant cages. We compared the level of interest in mice using a social preference test. Similar to previous reports, subject mice showed a high degree of interest in unfamiliar mice from distant cages. By contrast, subject mice reacted to mice from neighbouring cages as familiar mice, similar to cagemate mice. This suggests that mice housed in transparent cages with open lids perceive the external environment and identify mice in neighbouring cages. Researchers should pay attention to the environment outside the mouse cage, especially for the social preference test.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama2451-830192020Alpha-pinene and dizocilpine (MK-801) attenuate kindling development and astrocytosis in an experimental mouse model of epilepsy102114ENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareAtsumiShimadaDivision of Food and Nutrition, Nakamura Gakuen University Junior CollegeShunsukeSuemitsuDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolNaoyaKitamuraDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYuTakahashiDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolUnderstanding the molecular and cellular mechanisms involved during the onset of epilepsy is crucial for elucidating the overall mechanism of epileptogenesis and therapeutic strategies. Previous studies, using a pentylenetetrazole (PTZ)-induced kindling mouse model, showed that astrocyte activation and an increase in perineuronal nets (PNNs) and extracellular matrix (ECM) molecules occurred within the hippocampus. However, the mechanisms of initiation and suppression of these changes, remain unclear.</br>
Herein, we analyzed the attenuation of astrocyte activation caused by dizocilpine (MK-801) administration, as well as the anticonvulsant effect of α-pinene on seizures and production of ECM molecules. Our results showed that MK-801 significantly reduced kindling acquisition, while α-pinene treatment prevented an increase in seizures incidences. Both MK-801 and α-pinene administration attenuated astrocyte activation by PTZ and significantly attenuated the increase in ECM molecules.</br>
Our results indicate that astrocyte activation and an increase in ECM may contribute to epileptogenesis and suggest that MK-801 and α-pinene may prevent epileptic seizures by suppressing astrocyte activation and ECM molecule production.No potential conflict of interest relevant to this article was reported.Nature Publishing GroupActa Medica Okayama2045-232292019Helping-Like Behaviour in Mice Towards Conspecifics Constrained Inside Tubes5817ENHiroshiUenoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityShunsukeSuemitsuDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolNaoyaKitamuraDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoGraduate School of Health Sciences, Okayama UniversityTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolProsocial behaviour, including helping behaviour, benefits others. Recently, helping-like behaviour has been observed in rats, but whether it is oriented towards rescue, social contact with others, or other goals remains unclear. Therefore, we investigated whether helping-like behaviour could be observed in mice similar to that in rats. Because mice are social animals widely used in neuroscience, the discovery of helping-like behaviour in mice would be valuable in clarifying the psychological and biological mechanisms underlying pro-sociability. We constrained mice inside tubes. Subject mice were allowed to move freely in cages with tubes containing constrained conspecifics. The subject mice released both cagemates and stranger mice but did not engage in opening empty tubes. Furthermore, the same behaviour was observed under aversive conditions and with anesthetised conspecifics. Interestingly, hungry mice opened the tubes containing food before engaging in tube-opening behaviour to free constrained conspecifics. Mice showed equal preferences for constrained and freely moving conspecifics. We demonstrated for the first time that mice show tube-opening behaviour. Furthermore, we partly clarified the purpose and motivation of this behaviour. An effective mouse model for helping-like behaviour would facilitate research on the mechanisms underlying prosocial behaviour.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama0753-33221152019Comprehensive behavioral study of the effects of vanillin inhalation in mice108879ENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareAtsumiShimadaDivision of Food and Nutrition, Nakamura Gakuen University Junior CollegeShunsukeSuemitsuDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolNaoyaKitamuraDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYuTakahashiDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityYukoFujiwaraDepartment of Health and Sports Science, Kawasaki University of Medical WelfareTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolVanillin is widely used in food and cosmetics, among other substances, for its sweet smell. However, the neuropsychological effects of vanillin inhalation have not been elucidated. In this study, we investigated the effect of vanillin inhalation on mouse behavior. First, we investigated whether the aroma of vanillin was attractive or repulsive for mice. Thereafter, the mice inhaled vanillin for 20 min before each test in a series of behavioral tests (elevated plus maze, open field, Y-maze, tail suspension, cotton bud biting, and Porsolt forced swim tests). In these tests, the mice showed a neutral response to vanillin. Mice that inhaled vanillin had a suppressed pain response in the hot plate test. In addition, the grip strength of the forelimbs of mice that inhaled vanillin was decreased. No significant differences were found between the mice inhaling vanillin and control mice in the open field, Y-maze, tail suspension, forced swimming, and aggression tests. These results show that vanillin inhalation has anti-nociceptive effects, similar to other routes of administration. The results also show that vanillin inhalation does not cause significant behavioral effects.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama2451830162019Layer-specific expression of extracellular matrix molecules in the mouse somatosensory and piriform cortices117ENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareShunsukeSuemitsuDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolNaoyaKitamuraDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolIn the developing central nervous system (CNS), extracellular matrix (ECM) molecules have regulating roles such as in brain development, neural-circuit maturation, and synaptic-function control. However, excluding the perineuronal net (PNN) area, the distribution, constituent elements, and expression level of granular ECM molecules (diffuse ECM) present in the mature CNS remain unclear. Diffuse ECM molecules in the CNS share the components of PNNs and are likely functional. As cortical functions are greatly region-dependent, we hypothesized that ECM molecules would differ in distribution, expression level, and components in a region- and layer-dependent manner. We examined the layer-specific expression of several chondroitin sulfate proteoglycans (aggrecan, neurocan, and brevican), tenascin-R, Wisteria floribunda agglutinin (WFA)-positive molecules, hyaluronic acid, and link protein in the somatosensory and piriform cortices of mature mice. Furthermore, we investigated expression changes in WFA-positive molecules due to aging. In the somatosensory cortex, PNN density was particularly high at layer 4 (L4), but not all diffuse ECM molecules were highly expressed at L4 compared to the other layers. There was almost no change in tenascin-R and hyaluronic acid in any somatosensory-cortex layer. Neurocan showed high expression in L1 of the somatosensory cortex. In the piriform cortex, many ECM molecules showed higher expression in L1 than in the other layers. However, hyaluronic acid showed high expression in deep layers. Here, we clarified that ECM molecules differ in constituent elements and expression in a region- and layer-dependent manner. Region-specific expression of ECM molecules is possibly related to functions such as region-specific plasticity and vulnerability.No potential conflict of interest relevant to this article was reported. ElsevierActa Medica Okayama2405-8440562019Anti-stress effects of the hydroalcoholic extract of Rosa gallica officinalis in micee01945ENHiroshiUenoDepartment of Medical Technology, Kawasaki University of Medical WelfareAtsumiShimadaDivision of Food and Nutrition, Nakamura Gakuen University Junior CollegeShunsukeSuemitsuDepartment of Psychiatry, Kawasaki Medical SchoolShinjiMurakamiDepartment of Psychiatry, Kawasaki Medical SchoolNaoyaKitamuraDepartment of Psychiatry, Kawasaki Medical SchoolKentaWaniDepartment of Psychiatry, Kawasaki Medical SchoolYosukeMatsumotoDepartment of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama UniversityMotoiOkamotoDepartment of Medical Technology, Graduate School of Health Sciences, Okayama UniversityYukoFujiwaraDepartment of Health and Sports Science, Kawasaki University of Medical WelfareTakeshiIshiharaDepartment of Psychiatry, Kawasaki Medical SchoolRosa gallica, a plant of the Rosa genus, has been used widely since the 13th century and is cultivated in many areas as a medicinal plant for the preparation of herbal medicines. However, details of the neuropsychological effects of R. gallica remain unclear; therefore we aimed to investigate the neuropsychological effects of a water-soluble extract of R. gallica in male C57BL/6N mice under normal conditions and under chronic stress. We administered a water-soluble extract of R. gallica to mice and performed a series of behavioral experiments to compare the treated animals with the untreated controls. No significant differences in activity level, anxiety-like behavior, depression-like behavior, body weight, and body temperature were observed between R. gallica-treated mice and control mice. However, in mice subjected to chronic stress, the observed decrease in activity was smaller in the R. gallica-treated mice than in the control mice. The oral administration of R. gallica did not affect the normal behavior of mice. However, when the mice were subjected to stress, R. gallica exerted an anti-stress effect. Therefore, R. gallica has potential as a medicinal plant for the purpose of stress prevention.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X6732013Somatosensory and Visual Deprivation Each Decrease the Density of Parvalbumin Neurons and Their Synapse Terminals in the Prefrontal Cortex and Hippocampus of Mice135143ENHiroshiUenoChikafumiShoshiShunsukeSuemitsuShinichiUsuiHirokoSujiuraMotoiOkamotoOriginal Article10.18926/AMO/50406In the phenomenon known as cross-modal plasticity, the loss of one sensory system is followed by improved functioning of other intact sensory systems. MRI and functional MRI studies suggested a role of the prefrontal cortex and the temporal lobe in cross-modal plasticity. We used a mouse model to examine the effects of sensory deprivation achieved by whisker trimming and visual deprivation achieved by dark rearing in neonatal mice on the appearance of parvalbumin (PV) neurons and the formation of glutamic acid decarboxylase 67 (GAD67)-positive puncta around pyramidal neurons in the prefrontal cortex and hippocampus. Whisker trimming, but not dark rearing, decreased the density of PV neurons in the hippocampus at postnatal day 28 (P28). In the prefrontal cortex, whisker trimming and dark rearing decreased the density of PV neurons in layer 5/6 (L5/6) at P28 and in L2/3 at P56, respectively, whereas dark rearing increased the density of PV neurons in L5/6 at P56. Whisker trimming decreased the density of GAD67-positive puncta in CA1 of the hippocampus at both P28 and P56 and in L5/6 of the prefrontal cortex at P28. Dark rearing decreased the density of GAD67-positive puncta in CA1 of the hippocampus and in both L2/3 and L5/6 of the prefrontal cortex at P28, and in L2/3 of the prefrontal cortex at P56. These results demonstrate that somatosensory or visual deprivation causes changes in the PV-interneuronal network in the mouse prefrontal cortex and hippocampus. The results also suggest that the alteration of the PV-interneuronal network, especially in the prefrontal cortex, may contribute to cross-modal plasticity.No potential conflict of interest relevant to this article was reported.Okayama University Medical SchoolActa Medica Okayama0386-300X6622012Attenuated Sensory Deprivation-induced Changes of Parvalbumin Neuron Density in the Barrel Cortex of FcγRllB-deficient Mice143154ENMakikoWatanabeHiroshiUenoShunsukeSuemitsuErikoYokobayashiYosukeMatsumotoShinichiUsuiHirokoSujiuraMotoiOkamotoOriginal Article10.18926/AMO/48264Recent studies have demonstrated the important role of immune molecules in the development of neuronal
circuitry and synaptic plasticity. We have detected the presence of FcγRllB protein in parvalbumin-
containing inhibitory interneurons (PV neurons). In the present study, we examined the appearance
of PV neurons in the barrel cortex and the effect of sensory deprivation in FcγRllB-deficient mice (FcγRllB-/-) and wild-type mice. There was no substantial difference in the appearance of PV neurons
in the developing barrel cortex between FcγRllB-/- and wild-type mice. Sensory deprivation from immediately after birth (P0) or P7 to P12-P14 induced an increase in PV neurons. In contrast, sensory deprivation from P7 or P14 to P28, but not from P21 to P28, decreased PV neurons in wild-type mice. However, sensory deprivation from P0 or P7 to P12-P14 did not increase PV neurons and sensory deprivation from P7 or P14 to P28 did not decrease or only modestly decreased PV neurons in FcγRllB-/- mice. The results indicate that expression of PV is regulated by sensory experience and the second and third postnatal weeks are a sensitive period for sensory deprivation, and suggest that FcγRllB contributes to sensory experience-regulated expression of PV.No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-4494721997Extracellular matrix components and soluble VCAM-1 in synovial fluid with osteoarthritis of the knee99103ENHirokoTohgeMitsukoIchimuraJunkoSakiyamaMotoiOkamotoYasunariNakataHiroshiEndo10.18926/15289It is generally accepted that the number of patients with osteoarthritis (OA) of the knee must increase in the future because of the increase of the aged. The pathogenic mechanisms of OA haven't been elucidated yet, but it is supposed that mediate pannus may cause the factors for irreversible cartilage damage in the inflammatory process. Therefore it is very important to find and predict OA at the early stage. Now there were many indices to determine joint damage with OA, for example, cytokines including IL, TNF, TGF, matrix metalloproteinase (MMPs), tissue inhibitor of metalloproteinase (TIMPs), proteoglycan (PG), hyaluronate (HA), super oxide, adhesion molecules including, ICAM-1, VCAM-1 and PECAM. In this study, we measured that the soluble VCAM-1 (sVCAM-1), soluble collagen (sCOLL), heparansulfate proteoglycan (HSPG), uronic acis and CRP in synovial fluids (SF) with OA. A positive correlation between the level of sVCAM-1 and sCOLL (ρ = 0.652) was noted. However there was no factor showing a correlation with CRP. It was suggested that the levels of sVCAM-1 and sCOLL in the synovia fluid were active inflammation indices of knee damage, as the different aspects from CRP. The level of HSPG also showed a unique trend because HSPG on the cell surface was quickly digested endocytosis, so that it was not suitable for the inflammatory index in synovial fluid with OA.No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-4494811997側頭葉てんかんの海馬萎縮と臨床像の検討 ―MRIを用いた海馬萎縮の簡易評価―3135ENKeikoSatoMotoiOkamotoIkuoJojaTakeshiNakatsuKiyoshiMorimotoToshiyukiHayabaraShigetoshiKuroda10.18926/15281側頭葉てんかん患者39例の海馬萎縮をMRIを用いて評価し,臨床像との関連を検討した｡MRIの冠状断short SE像で海馬の幅を計測し,萎縮側海馬の村側海馬に対する比(a)を求め,海馬萎縮(+)群;a<0.8,11例,境界群;0.8≦a<0.9,13例,海馬萎縮(-)群;a≧0.9,15例の3群に分けた｡海馬萎縮(+)群で罹病期間が長い傾向があった｡また,発作間歇期脳波の焦点側は海馬委縮(+)群の11例中9例で萎縮側と一致した。しかし,発病年齢,MRI撮影時年齢,発作頻度,全般化発作の有無,抗てんかん薬総服用量,知能障害,精神症状,生下時仮死の有無については3群間で差が認められなかった｡この結果から,側頭葉てんかんにおける海馬萎縮は,生下時や全身けいれん発作時の低酸素状態によるものではなく,脳局所の反復するてんかん性発射と関連する可能性が示唆され,海馬萎縮の機序を考えるうえで興味深く思われた。No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-4494811997睡眠ポリグラフ自動解析のための記録･解析条件の検討2329ENMotoiOkamotoMakikoInoueMakikoNakashimaSekikoIto10.18926/15280自動解析装置を用いて終夜睡眠ポリグラフを解析する際の記録条件と解析条件を検討した。対象は若年成人女性10名で,解析には0xford社製睡眠ポリグラフ記録･解析装置Medilog SAC 847 Systemを用い,第3夜の記録を視察判定と比較した｡徐波睡眠の指標となるδ波の最小振幅基準を初期設定の基線から±31/μVと,これより低い±25/μVに設定すると,徐波睡眠量,徐波睡眠率とも視察による判定とほぼ同じ解析結果が得られた。眼球運動の入力感度はREM睡眠量,REM睡眠率に影響しなかったが,オトガイ筋電図の入力感度を初期設定の1.5VにするとREM睡眠がほとんどみれなくなる例が多く,1.0VではREM睡眠量がこれまでの報告より少ないものの,視察判定に近い結果が得られた｡以上の研究結果から,我々が用いた自動解析装置では,オトガイ筋電図の入力感度を1.0V,δ波の最小振幅基準を±25〜31/μVに設定すれば,視察判定とほぼ同じ解析結果が得られると考えられた｡No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-4494921999Affinity purification of phosphacan core protein expressed in Escherichia coli as histidine-tagged fusion protein105111ENSekikoItoMotoiOkamotoShujiMori10.18926/15254Specific regions of core protein of phosphacan, one of the chondroitin sulfate proteoglycans, were expressed as fusion proteins with histidine-tag (His-tag) in Escherichia coli (E.coli) and were affinity purified using nickel-nitrilotriacetic acid (Ni-NTA) matrix. cDNA fragments encoding amino acid residues 343-446 (P3) and 1-340 (P4) of phosphacan core protein were amplified by polymerase chain reaction from E18 rat brain mRNA as template. The amplified products were subcloned into pQE30
vector and were introduced into E.coli strain M15 [pREP4] for the expression. The His-tagged fusion proteins were expressed by cultivating the transformants at 37℃ for 5h in the presence of 1mM IPTG. His-tagged P3 fusion protein (His-P3) was expressed as soluble form, and was purified
using Ni-NTA matrix. His-tagged P4 fusion protein (His-P4) which was sequestered into insoluble inclusion bodies was treated with 8.0M urea to solubilize, and then was purified under denaturing conditions.No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-4494921999衛生技術学科入学者の高校評点,入学試験成績と入学後の学業成績の関係 ―入学者選抜,教育方法の改善に向けた自己点検･評価(1)―91104ENMotoiOkamotoJunkoSakiyamaKazuyaAkatsuka10.18926/152531987年4月から1995年4月の9年間に衛生技術学科へ入学した361名を対象に,高校評点,入学試験(学力試験)成績と,入学後の学業成績,退学,留年,臨床検査技師国家試験との関係を調べた｡ 1)入学者総数は361名で,このうち留年者が39名(10,8%),退学者が18名(5%)であった｡退学者の中には,実質入学辞退者が6名,4年制大学へ進路を変更した者が4名いたが,こうした退学者は1992年度までの入学者に多かった｡ 2)入学者全体では,予定卒業者,留年者,退学者の間で高校評点,入学試験成績には差がなかったが,入学年度ごとにみると,1987,1988年度は留年者が予定卒業者に比べて入学試験の総得点が高い傾向があり,逆に1991年,1993年度は予定卒業者に比べて有意に低かった｡ 3)高校評点は,データが入手できた1991年度以降一貫して留年者の評点が予定卒業者より低く, とくに1991年,1993年度は留年者の評点が有意に低かった｡ 4)留年者も含めて,一般教育科目の成績と専門科目の成績との間に有意を正の相関がみられた｡ 5)高校評点と入学試験成績との間には軽度の相関しかみられなかったが,高校評点および入学試験総合点は入学後の一般教育科目,専門科目の成績と高い正の相関を示した｡ 6)しかし,個々の入学試験科目の得点は,入学後の成績と相関しないか,軽度の相関しかみられなかった｡ 7)国家試験不合格者は,高校評点,入学試験総合点,一般科目平均点,専門科目平均点のいずれも合格者に比べて得点が低かったが,有意差はなかった｡以上の結果から,短期大学部開設当初は留年者,退学者の中に予定卒業者より学力のある学生がいたが,年を追うごとに入学者の学力が均質化し,学力が不十分なために留年する学生が多くなってきていると言える。一般教育科目の成績と専門科目の成績が強い正の相関を示すことは,1年次の成績がそのまま2,3年次の成績に反映されることを示しており,入学当初の動機付けと勉学意欲の喚起が重要なことを示している｡高校評点や学力試験の成績は入学後の成績とよく相関しており,学生選抜の有効な指標であると考えられたが,各入試科目との相関は乏しかったことから,個々の試験科目の問題内容については改善すべき課題があると思われた｡No potential conflict of interest relevant to this article was reported.岡山大学医学部保健学科Acta Medica Okayama1345-09481212001老人保健施設における痴呆老人の満足度調査6370ENKazukoSumiyoshiChiekoKawataHatsueOkanoMotoiOkamotoKiyoshiTakahashiShujiMoriHisaeTsujimotoEikoSue10.18926/152442つの老人保健施設に入所している痴呆老人について,観察者による彼らの満足度とその時に観察された行動の関係を明らかにすることを目的とする｡調査対象者は,2つの老人保健施設に入所中で,本人または家族より調査への了系の得られた,歩行可能な痴呆老人各14名,合計28名である｡観察者は対象者の行動を48時間観察し,どこで誰と何を行っているかとその時の満足度を調査票に記録した｡満足度は対象者の表情や態度から観察者が判断し,大変満足をDとし,どちらとも言えないをB,大変不満足を@とした5段階評定で示した｡その結果以下の3点が明らかとなった｡ 1)両施設で満足度の高い時間帯は,レクリエーションが含まれる"午前中の時間"であった｡ 2)満足度が高いのは,居場所では,"レクリエーションルーム･屋外"であった｡ 3)同行者は,"家族","観察者",行動は,"話をする",手伝いをするなど"自発的な行為"が多くみられた｡以上により,2つの施設で満足度ごとの時間帯,居場所,同行者と行動が似通っていたことから,客観的に痴呆老人の満足度を把握することは可能であると考える｡No potential conflict of interest relevant to this article was reported.岡山大学医学部保健学科Acta Medica Okayama1345-09481512004はとむぎ,はとむぎテンペのラットコレステロール代謝改善作用に関する研究914ENMotoiOkamotoShinichiUsuiMitsuyoOkazaki10.18926/15190はとむぎ(Coicis semen)をテンペ菌(Rhizopus oligosporus)で発酵したはとむぎテンペ(テンペ)の血清コレステロール代謝に対する作用を検討した｡生後12週齢のSprague-Dawley系雄ラットに市販固形飼料(コントロール群),はとむぎ混合飼料(はとむぎ群),テンペ混合飼料(テンペ群)を投与し,2,6,18週間後に高速液体クロマトグラフィー法で血清コレステロールを測定した｡体重増加,総コレステロールはいずれの時点でも3群間に差がなかったが,テンペ群では投与前と比較して2,6,18週間後にLDLコレステロールが有意に低下し,LDLコレステロール/HDLコレステロール比も2,18週間後に有意に低下した｡テンペ群はコントロール群と比較してもLDLコレステロールとLDLコレステロール/HDLコレステロール比が低く,はとむぎ群でも低い傾向がみられたが,有意差はなかった｡以上から,テンペがコレステロール代謝改善作用をもつことが示唆された｡No potential conflict of interest relevant to this article was reported.岡山大学医学部保健学科Acta Medica Okayama1345-09481522005気管内吸引を必要とする在宅療養患者の感染管理の実態6369ENKumiWatanabeHitomiKanzakiYoshikoSendaMotoiOkamoto10.18926/15186気管内吸引を必要とする在宅療養患者に対し,安全で経済的な感染管理方法を検討するため,在宅ケアにおける気管内吸引の実態と,吸引関連物品の細菌学的調査を実施した。対象は気管切開がされ,医療依存度の高い患者3名であり,気管内吸引は全て患者の妻が行っていた。吸引後のカテーテルは外側をアルコール綿で清拭し,内腔を洗浄水で洗浄していた。カテーテルは,0.05%グルコン酸クロルヘキシジンに浸漬あるいは,清潔な乾燥容器に保管されていた。カテーテルの交換時期は,1.5日から7日とばらつきがあった。カテーテル,洗浄水,浸潰液等の試料を,一般細菌,黄色ブドウ球菌,大腸菌群の寒天培地で培養したところ,各試料から一般細菌,黄色ブドウ球菌,大腸菌群が検出されたが,カテーテルの保管方法の違いによる細菌汚染に差は認められなかった｡また,気管切開部ガーゼからは,一般細菌,黄色ブドウ球菌,大腸菌群が検出された｡これらより,気管内吸引カテーテルおよび,洗浄水や浸溝用消毒液の清潔管理の必要性が示唆された｡No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-449451995ラット再生肝組織におけるProliferating Cell Nuclear AntigenとBromodeoxyuridineの染色性についての比較研究 ―固定条件の影響について―7985ENJunkoSakiyamaShujiMoriMitukoIchimuraHirokoTohgeMotoiOkamotoHiroshiEndo10.18926/11921種々の条件下（10％緩衝ホルマリン・6時間、1％パラホルムアルデヒド・6時間、100％メタノール・4時間、70％エタノール・6時間、100％アセトン・2時間、カルノア液・4時間）で固定したラット再生肝組織に免疫組織染色を施し、Proliferating cell nuclear antigen （PCNA）の核内染色パターンについての検討を行った。その結果、100％メタノール及び70％エタノールで固定した場合には、明瞭な顆粒状の染色像が得られた。10％緩衝ホルマリン及び1％パラホルムアルデヒドの場合には、明瞭な顆粒状並びに弱いびまん性の染色像が得られた。S期に対する代表的なマーカーとして知られるBromodeoxyuridine （BrdU）の染色像との比較のもと、再生肝組織中のPCNA陽性細胞の数とBrdU陽性細胞の数を再生ピーク時の術後1日目で検討したところ、100％メタノール及び70％エタノールで固定した際の陽性細胞数が、最もBrdUの所見と一致した。しかし、10％緩衝ホルマリン、1％パラホルムアルデヒド、100％アセトン、カルノア液で固定した場合には、BrdUの所見と著しい解離が見られた。これらの知見は、PCNAを指標に細胞増殖を評価する上で、100％メタノール、70％エタノールでの固定が有用であることを示唆する。No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-449441994Utilization of a serum-free primary culture of cortical neurons by using cyclodextrins in neurobiological research3745ENMotoiOkamotoShujiMori10.18926/11869神経生物学的研究における基本的分析系の確立を目的として、シクロデキストリン（CD）を用いたラット大脳皮質神経細胞の初代培養を試みた。β-およびγ-CDは、無血清培地（ダルベッコ改変MEM/ハム培地）中で胎生16および18日目ラットの神経細胞を11日以上10％胎児ウシ血清を加えた培地中と同じ程度に生存させたが、α-CDには生存維持効果が無かった。β-CDはγ-CDより安定した生存維持効果を示したが、胎生21日目ラットの神経細胞を用いた場合は有意に生存率が低下し、新生児ラットでは生存維持効果が無かった。β-CDを用いた無血清培養では10％血清培地中と比べて神経突起の伸展が悪かったが、ときに顕著な突起伸展がみられ、これはCD分子に取り込まれた生理活性物質の作用と考えられた。また、β-CDを用いた無血清培養を利用してラット脳から精製したコンドロイチン硫酸プロテオグリカン（CSPG）の作用を検討し、CSPGがグルタミン酸による神経細胞死を防止すること、弱いながら培養神経細胞の生存を維持する作用をもつことを示した。以上の結果から、この無血清培養法は神経生物学的研究において有用な分析系となりうることを指摘した。No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-449431993アルコール性肝障害112ENHiroshiEndoYasunariNakataMotoiOkamotoShujiMoriTakeoOhta10.18926/11818Relationship between ethanol drinking and organs injury was reviewed and special emphasis was put on alcoholic liver disease. Consumption of alcoholic beverage expressed as ethanol per capita of adult in Japan increased 2.1 times in these 25 years and it is still increasing. Although the incidence of alcoholic liver disease in Japan also increased greatly during the above period, it seems likely that plateau level is coming because of genetically defined, unique type of alcohol metabolism in Japanese. Sex differences in susceptibility to alcohol were discussed. Among the six types of alcoholic liver disease, alcoholic liver fibrosis is relatively frequent in Japan. Mechanism of liver injury has been studied extensively. Alcohol itself is toxic but other factors such as dietary fat are also important. Biochemical and immunological markers of drinking were presented. As for the treatment, most patients especially in early stages of the disease well respond to alcohol withdrawal, but therapy of alcohol dependence in the background of the disease is very difficult requiring cooperative works of different kinds of specialists.No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-449411991CNVの記録条件と非定型波形の生理学的意義9197ENMotoiOkamotoMasatoTeminoNaohisaNakagawaHirokazuMori10.18926/11783We recorded a slow negative potential from Cz (10/20 method) in 49 healthy students (12 male, 37 female, mean age 19.1) by a short interstumulus interval CNV paradigm. The interstimulus interval was 2 or 3 seconds, the warning stimulus presented at random or regular interval at 0.2 Hz. An atypical negative variation with two separated negative peaks was recorded in 26.0-30.6% trials regardless of interstimulus interval or modality of warning stimulus presentation, while a typical CNV was recorded in 32.0-59.2% of trials. No apparent negative variation was recorded in 14.3-18.4% in 2 seconds interstimulus interval, and 28-38% in 3 seconds interstimulus interval, showing that 2 seconds interval is better to get stable CNV recording than 3 seconds interval. The first negative wave of the atypical negative variation was 692-799msec in duration, but frequently prolonged to 1000msec or more in 3 seconds interval. It usually had negative peak around 900-1100msec, but sometimes around 1500msec. This features are different from any reported negative components of CNV. The second negative wave began 800-1200msec before second stimulus, and had its peak just before second stimulus, showing common features with readiness potential. The appearance of CNV was unsatble in the students in which the atypical negative variation was recorded in regular, 2 seconds intersitimulus interval, and the amplitude of slow vertex response and pattern reversal visual evoked potential was lower in thses students than in the students in which a typical CNV was recorded more than 3 times in total 4 times of trials. These findings indicate that the atypical variation observed in this study is due to a lowered arousal level or cortical neuronal activity, rather than a separated appearance of different components of CNV.No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-4494711996疎水性クロマトグラフィに伴う耐熱性ホスタファーゼ活性の変動1721ENShujiMoriMotoiOkamotoYasunariNakataHiroshiEndo10.18926/11760耐熱性ホスファターゼを含んだBacillus stearothermophilus 粗酵素試料を、リソースIsoによる疎水性クロマトグラフィにかけ分離を行った。1.5M→0M 硫酸アンモニウムの直線逆濃度勾配によって溶出を行ったところ、ホスファターゼは不活性な形で溶出され、これは硫酸アンモニウムによる濃度依存的阻害に起因することが判明した。ホスタファーゼの反応混合液に種々の濃度の硫酸アンモニウムを添加したところ、0.15Mの硫酸アンモニウム存在下で約80％の阻害が認められた。加えて、この阻害作用は単に硫酸アンモニウムの添加によってpHが酸性側に傾くことによるものではないことも明らかとなった。No potential conflict of interest relevant to this article was reported.岡山大学医療技術短期大学部Acta Medica Okayama0917-449461996Expression of Phosphacan, a chondroitin sulfate proteoglycan, core protein in Esherichia coli as a fusion protein with glutathione S-transferase6372ENSekikoItoMotoiOkamoto10.18926/11756Optimal conditions for expressing a specific region of core protein of phosphacan, a chondroitin sulfate proteoglycan known as receptor type protein tyrosine phosphatase, as fusion protein with glutathione S-transferase (GST) in E.coli were examined. DNA fragments inserted into the expression vector (pGEX-4T-1) were amplified by RT-PCR using mRNA purified from E18 rat brain as template. Primers attached with BamH I or EcoR I restriction site on 5' end were used to amplify first strand cDNA by PCR. Before ligation into the pGEX-4T-1 for GST fusion protein, PCR products were once cloned using T-A cloning system because they were not directly ligated into the pGEX-4T-1. E.coli strain BL21 was transformed by pGEX-4T-1 ligated with restriction DNA fragment cut out from pCR II plasmid vector of T-A clonig system. The growth of transformed BL21 was not different between the colony incubated at 37℃ for 24-48h and the colony stored at 4℃ for 7-10 days after 24h incubation at 37℃. The desirable OD(550) of culture medium for inducing the expression of fusion protein by isopropylthio-β-D-galactoside (IPTG) was from 0.6 to 1.0, because expression of native E.coli proteins per ml of culture medium was increased relatively when IPTG was added at OD(550) more than 1.0. The expression of fusion protein reached plateau around 6h after the induction. Relative expression of native E.coli proteins per ml of culture medium increased thereafter. Therefore, it may be desirable to purify the fusion protein around 6h after the induction.No potential conflict of interest relevant to this article was reported.岡山大学医学部保健学科Acta Medica Okayama1345-09481022000ラットにおけるカイニン酸けいれん発作重積後のMRI所見と病理所見の関係6976ENJunkoSakiyamaMotoiOkamotoYoshihiroKitamuraNorihitoYamada10.18926/11715側頭葉てんかんでは，てんかん焦点に一致してMRI T2高信号領域が見られ，FLAIR法でこれがより明瞭になるが，このMRI所見と病理組織学的変化との関係は必ずしもはっきりしていない。そこで，Sprague−Dawleyラットにカイニン酸（KA）でけいれん発作重積状態を起こし，経時的にMRIを記録するとともに，ニッスル染色，GFAP免疫染色での病理組織学的変化を調べて両者の関係について検討した。KA群では，MRIで1〜8週間後のいずれにおいてもpiriform cortexからentorhinal cortexにかけて不整形のT2高信号領域がみられたが，stage3のけいれん発作しか出現しなかったラットではstage4，5が出現したラットに比べて程度が弱かった。組織学的には，CA1，subiculum，piriform cortex，entorhinal cortexで神経細胞の消失，濃染細胞の増加と萎縮，GFAP免疫反応の増強が見られたが，piriform cortex，entorhinal cortexでの神経細胞消失の程度はT2信
号の程度と相関せず，GFAP免疫反応が増強した領域に一致して高信号がみられた。しかし，海馬のGFAP免疫反応増強はMRI所見に反映されず，これはMRIの解像度の限界にもよると考えられた。No potential conflict of interest relevant to this article was reported.Acta Medica Okayama1983正中離断による全汎化機序の検討 燃え上がり現象を用いた側頭部皮質焦点発作の実験的研究ENNo potential conflict of interest relevant to this article was reported.