記述言語：英語   掲載種別：研究論文（学術雑誌）  

Chicken early (EF) and late feathering (LF) are sex-linked phenotypes conferred by wild-type k+ and dominant K alleles on chromosome Z, respectively. Besides prolactin (PRL) receptor (PRLR) and sperm flagellar 2 (SPEF2) genes, the K allele contains a fusion gene in which partially duplicated PRLR (dPRLR) and SPEF2 (dSPEF2) genes are linked in a tail-to-tail manner. The causative dPRLR gene encodes a C-terminal truncated receptor. LF chickens have short or no primaries at hatching; however, their feather growth rate is higher than that of EF chickens. This study aimed to elucidate the molecular basis of the K allele's biphasic effect on feather development. By 3'RACE and RT-PCR analyses, we demonstrated that dSPEF2 gene transcription occurred beyond all coding exons of the dPRLR gene on the opposite strand and that dPRLR mRNA was less abundant than PRLR mRNA. In addition, a 5'UTR splice variant (SPV) of PRL receptor mRNAs was increased in LF chickens. In vitro expression analysis of 5'UTR linked to the luciferase reporter gene revealed higher translation efficiency of SPV. RT-qPCR showed that the dPRLR mRNA level was higher in embryos; conversely, SPV was higher in hatched chickens, as was dSPEF2 mRNA. These findings suggest that the K allele inhibits feather development at the fetal stage by expressing dPRLR to attenuate PRLR function and promotes feather growth after hatching by increasing PRLR through dSPEF2 mRNA expression. Increased SPV may cause greater feather growth than that in EF chickens by increasing the availability of PRLR homodimers and enhancing PRL signaling.

DOI： 10.1016/j.ygcen.2018.12.011

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Ghrelin is a unique fatty acid-modified peptide hormone produced in the stomach and has important roles in energy homeostasis and gastrointestinal motility. However, the medium-chain fatty acid source for ghrelin acyl-modification is not known. We found that a fat-free diet and the removal of intestinal microbiota did not decrease acyl-ghrelin production in the stomach or plasma acyl-ghrelin levels in mice. RT-PCR analysis showed that genes involving fatty acid synthesis, metabolism, and transport were expressed in pancreas-derived ghrelinoma (PG-1) cells. Treatment with an irreversible inhibitor of carnitine palmitoyltransferase-1 (CPT-1) strongly decreased acylated ghrelin levels but did not affect ghrelin or ghrelin o-acyl transferase (GOAT) mRNA levels in PG-1 cells. Our results suggest that the medium-chain fatty acid used for the acyl-modification of ghrelin is produced in ghrelin-producing cells themselves by β-oxidation of long-chain fatty acids provided from the circulation.

DOI： 10.1038/s41598-018-27458-2

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.nut.2017.02.003

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

The adenohypophysis is formed from the oral ectoderm and consists of the pars distalis (PD), pars intermedia, and pars tuberalis (PT). The mechanisms of PD development have been extensively studied, and the cellular differentiation of the PD is well understood. However, the morphogenesis and differentiation of the PT are still unclear, and the genes expressed during PT development remain largely unknown. We have explored genes specifically expressed in the PT during embryonic development and analyzed their spatiotemporal expression patterns. Microarray analysis of laser-captured PT and PD tissues obtained from chick embryos on embryonic day 10 (E10.0) has shown high expression of Cytokine-like 1 (CYTL1) and Gap junction protein alpha 5 (GJA5) genes in the PT. Detailed analysis of these spatiotemporal expression patterns during chick embryo development by in situ hybridization has revealed that CYTL1 mRNA first appears in the lateral head ectoderm and ventral head ectoderm at E1.5. The expression of CYTL1 moves into Rathke's pouch at E2.5 and is then localized in the PT primordium where it is continuously expressed until E12.0. GJA5 mRNA is transiently detected in the PT primordium from E6.0 to E12.0, whereas its expression is not detected in the PD during development. Thus, these genes might be involved in the regulation mechanisms of PT development and could be useful markers for PT development.

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The migrating motor complex (MMC) is responsible for emptying the stomach during the interdigestive period, in preparation for the next meal. It is known that gastric phase III of MMC starts from the proximal stomach and propagates the contraction downwards. We hypothesized that a certain region of the stomach must be more responsive to motilin than others, and that motilin-induced strong gastric contractions propagate from that site. Stomachs of the Suncus or Asian house shrew, a small insectivorous mammal, were dissected and the fundus, proximal corpus, distal corpus, and antrum were examined to study the effect of motilin using an organ bath experiment. Motilin-induced contractions differed in different parts of the stomach. Only the proximal corpus induced gastric contraction even at motilin 10(-10) M, and strong contraction was induced by motilin 10(-9) M in all parts of the stomach. The GPR38 mRNA expression was also higher in the proximal corpus than in the other sections, and the lowest expression was observed in the antrum. GPR38 mRNA expression varied with low expression in the mucosal layer and high expression in the muscle layer. Additionally, motilin-induced contractions in each dissected part of the stomach were inhibited by tetrodotoxin and atropine pretreatment. These results suggest that motilin reactivity is not consistent throughout the stomach, and an area of the proximal corpus including the cardia is the most sensitive to motilin.

DOI： 10.1007/s00360-016-0985-1

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

Signal-peptide peptidase (SPP) is an intramembrane protease that participates in the production of the mature core protein of hepatitis C virus (HCV). Here we show that SPP inhibition reduces the production of infectious HCV particles and pathogenesis. The immature core protein produced in SPP-knockout cells or by treatment with an SPP inhibitor is quickly degraded by the ubiquitin-proteasome pathway. Oral administration of the SPP inhibitor to transgenic mice expressing HCV core protein (CoreTg) reduces the expression of core protein and ameliorates insulin resistance and liver steatosis. Moreover, the haploinsufficiency of SPP in CoreTg has similar effects. TRC8, an E3 ubiquitin ligase, is required for the degradation of the immature core protein. The expression of the HCV core protein alters endoplasmic reticulum (ER) distribution and induces ER stress in SPP/TRC8 double-knockout cells. These data suggest that HCV utilizes SPP cleavage to circumvent the induction of ER stress in host cells.

DOI： 10.1038/ncomms11379

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1111/nmo.12564

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Ghrelin, an endogenous ligand for the growth hormone secretagogue receptor, is produced predominantly in the stomach. It has been reported that endogenous ghrelin levels are increased by fasting and decreased immediately after feeding and that fasting-induced ghrelin release is controlled by the sympathetic nervous system. However, the mechanisms of plasma ghrelin decrement after feeding are poorly understood. Here, we studied the control of ghrelin secretion using ghrelin-producing cell lines and found that these cells express high levels of mRNA encoding G-protein coupled receptor 120 (GPR120). Addition of GW-9508 (a GPR120 chemical agonist) and α-linolenic acid (a natural ligand for GPR120) inhibited the secretion of ghrelin by ∼50 and 70%, respectively. However, the expression levels of preproghrelin and ghrelin O-acyltransferase (GOAT) mRNAs were not influenced by GW-9508. In contrast, the expression levels of prohormone convertase 1 were decreased significantly by GW-9508 incubation. Moreover, we observed that the inhibitory effect of GW-9508 on ghrelin secretion was blocked by a small interfering RNA (siRNA) targeting the sequence of GPR120. Furthermore, pretreatment with GW-9508 blocked the effect of the norepinephrine (NE)-induced ghrelin elevation in ghrelin cell lines. In addition, we showed that GW-9508 inhibited ghrelin secretion via extracellular signal-regulated kinase activity in ghrelin cell lines. Finally, we found that GW-9508 decreased plasma ghrelin levels in mice. These results suggest that the decrease of ghrelin secretion after feeding is induced partially by long-chain fatty acids that act directly on gastric GPR120-expressing ghrelin cells.

DOI： 10.1152/ajpendo.00306.2013

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

The pars tuberalis (PT) is a part of the anterior pituitary gland that is located as a thin cell layer surrounding the median eminence. The characteristics of PT, including cell shape and cell composition, differ from those of the pars distalis (PD), suggesting that PT has unique physiological functions and different morphogenesis compared to PD. In this study, we used chicken embryos and showed for the first time that most hormone-producing cells in PT at embryonic day (E) 20.0 were only glycoprotein α subunit (αGSU)-positive staining cells. Then, using serial frontal and sagittal sections, we examined the detailed distribution of the αGSU mRNA-expressing region, as a marker of PT in the chicken embryonic pituitary gland during the E3.0-20.0 period. This three-dimensional expression pattern analysis clarified that αGSU mRNA expression initially appeared only in the bilateral regions of the Rathke's recess (RR) at E3.5, and this region expanded and showed a ring-like structure on RR. Subsequently, this αGSU mRNA-expressing region gradually expanded upward and reached the diencephalon at E8.0. This region became thinner as it surrounded the base of the diencephalon from E12.0 to E20.0. In this study, we demonstrated the detailed morphological changes of the chicken PT primordium by detecting αGSU mRNA, and we also showed that PT is a unique region in the early developmental stage.

DOI： 10.1007/s10735-012-9479-y

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The upper gastrointestinal (GI) tract undergoes a temporally coordinated cyclic motor pattern known as the migrating motor complex (MMC) in both dogs and humans during the fasted state. Feeding results in replacement of the MMC by a pattern of noncyclic, intermittent contractile activity termed as postprandial contractions. Although the MMC is known to be stimulated by motilin, recent studies have shown that ghrelin, which is from the same peptide family as motilin, is also involved in the regulation of the MMC. In the present study, we investigated the role of the vagus nerve on gastric motility using conscious suncus-a motilin- and ghrelin-producing small animal. During the fasted state, cyclic MMC comprising phases I, II, and III was observed in both sham-operated and vagotomized suncus; however, the duration and motility index (MI) of phase II was significantly decreased in vagotomized animals. Motilin infusion (50 ng·kg(-1)·min(-1) for 10 min) during phase I had induced phase III-like contractions in both sham-operated and vagotomized animals. Ghrelin infusion (0.1, 0.3, 1, 3, or 10 µg·kg(-1)·min(-1) for 10 min) enhanced the amplitude of phase II MMC in sham-operated animals, but not in vagotomized animals. After feeding, phase I was replaced by postprandial contractions, and motilin infusion (50 ng·kg(-1)·min(-1) for 10 min) did not induce phase III-like contractions in sham-operated suncus. However, in vagotomized suncus, feeding did not evoke postprandial contractions, but exogenous motilin injection strongly induced phase III-like contractions, as noted during the phase I period. Thus, the results indicate that ghrelin stimulates phase II of the MMC via the vagus nerve in suncus. Furthermore, the vagus nerve is essential for initiating postprandial contractions, and inhibition of the phase III-like contractions induced by motilin is highly dependent on the vagus nerve.

DOI： 10.1371/journal.pone.0064777

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Here, we have reported that motilin can induce contractions in a dose-dependent manner in isolated Suncus murinus (house musk shrew) stomach. We have also shown that after pretreatment with a low dose of motilin (10(-10) M), ghrelin also induces gastric contractions at levels of 10(-10) M to 10(-7) M. However, the neural mechanism of ghrelin action in the stomach has not been fully revealed. In the present study, we studied the mechanism of ghrelin-induced contraction in vitro using a pharmacological method. The responses to ghrelin in the stomach were almost completely abolished by hexamethonium and were significantly suppressed by the administration of phentolamine, prazosin, ondansetron, and naloxone. Additionally, N-nitro-l-arginine methylester significantly potentiated the contractions. Importantly, the mucosa is essential for ghrelin-induced, but not motilin-induced, gastric contractions. To evaluate the involvement of intrinsic primary afferent neurons (IPANs), which are multiaxonal neurons that pass signals from the mucosa to the myenteric plexus, we examined the effect of the IPAN-related pathway on ghrelin-induced contractions and found that pretreatment with adenosine and tachykinergic receptor 3 antagonists (SR142801) significantly eliminated the contractions and GR113808 (5-hydroxytryptamine receptor 4 antagonist) almost completely eliminated it. The results indicate that ghrelin stimulates and modulates suncus gastric contractions through cholinergic, adrenergic, serotonergic, opioidergic neurons and nitric oxide synthases in the myenteric plexus. The mucosa is also important for ghrelin-induced gastric contractions, and IPANs may be the important interneurons that pass the signal from the mucosa to the myenteric plexus.

DOI： 10.1371/journal.pone.0060365

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

The pars tuberalis (PT) is part of the anterior pituitary gland surrounding the median eminence as a thin cell layer. The characteristics of PT differ from those of the pars distalis (PD), such as cell composition and gene expression, suggesting that the PT has a unique physiological function compared to the PD. Because the PT highly expresses melatonin receptor type 1, it is considered a mediator of seasonal and/or circadian signals of melatonin. Expression of neuromedin U (NMU) that is known to regulate energy balance has been previously reported in the rat PT; however, the regulatory mechanism of NMU mRNA expression and secretion in the PT are still obscure. In this study, we examined both the diurnal change of NMU mRNA expression in the rat PT and the effects of melatonin on NMU in vivo. In situ hybridization and quantitative PCR analysis of laser microdissected PT samples revealed that NMU mRNA expression in the PT has diurnal variation that is high during the light phase and low during the dark phase. Furthermore, melatonin administration significantly suppressed NMU mRNA expression in the PT in vivo. On the other hand, 48 h fasting did not have an effect on PT-NMU mRNA expression, and the diurnal change of NMU mRNA expression was maintained. We also found the highest expression of neuromedin U receptor type 2 (NMUR2) mRNA in the third ventricle ependymal cell layer, followed by the arcuate nucleus and the spinal cord. These results suggest that NMU mRNA expression in the PT is downregulated by melatonin during the dark phase and shows diurnal change. Considering that NMU mRNA in the PT showed the highest expression level in the brain, PT-NMU may act on NMUR2 in the brain, especially in the third ventricle ependymal cell layer, with a circadian rhythm.

DOI： 10.1371/journal.pone.0067118

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Ghrelin, isolated from the stomach as an endogenous ligand for the growth hormone secretagogue receptor (GHS-R), has potent growth hormone release ability in vivo and in vitro. Although GHS-R is abundantly expressed in the pituitary gland, there is no direct evidence of a relationship between hormone-producing cells and functional GHS-R in the pituitary gland. The aim of this study was to determine which anterior pituitary cells respond to ghrelin stimulation in male rats. We performed Fura-2 Ca(2+) imaging analysis using isolated pituitary cells, and performed immunocytochemistry to identify the type of pituitary hormone-producing cells. In Fura-2 Ca(2+) imaging analysis, ghrelin administration increased the intracellular Ca(2+) concentration in approximately 50% of total isolated anterior pituitary cells, and 20% of these cells strongly responded to ghrelin. Immunocytochemical analysis revealed that 82.9 ± 1.3% of cells that responded to ghrelin stimulation were GH-immunopositive. On the other hand, PRL-, LH-, and ACTH-immunopositive cells constituted 2.0 ± 0.3%, 12.6 ± 0.3%, and 2.5 ± 0.8% of ghrelin-responding pituitary cells, respectively. TSH-immunopositive cells did not respond to ghrelin treatment. These results suggest that ghrelin directly acts not only on somatotrophs, but also on mammotrophs, gonadotrophs, and corticotrophs in the rat pituitary gland.

DOI： 10.1016/j.neulet.2012.07.063

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

We previously identified ghrelin and motilin genes in Suncus murinus (suncus), and also revealed that motilin induces phase III-like strong contractions in the suncus stomach in vivo, as observed in humans and dogs. Moreover, repeated migrating motor complexes were found in the gastrointestinal tract of suncus at regular 120-min intervals. We therefore proposed suncus as a small laboratory animal model for the study of gastrointestinal motility. In the present study, we identified growth hormone secretagogue receptor (GHS-R) and motilin receptor (GPR38) genes in the suncus. We also examined their tissue distribution throughout the body. The amino acids of suncus GHS-R and GPR38 showed high homology with those of other mammals and shared 42% amino acid identity. RT-PCR showed that both the receptors were expressed in the hypothalamus, medulla oblongata, pituitary gland and the nodose ganglion in the central nervous system. In addition, GHS-R mRNA expressions were detected throughout the stomach and intestine, whereas GPR38 was expressed in the gastric muscle layer, lower intestine, lungs, heart, and pituitary gland. These results suggest that ghrelin and motilin affect gut motility and energy metabolism via specific receptors expressed in the gastrointestinal tract and/or in the central nervous system of suncus.

DOI： 10.1016/j.peptides.2012.04.019

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Although δ-crystallin (δ-crys), also known as lens protein, is transiently expressed in Rathke's pouch (RP) of the chick embryo, detailed temporal and spatial expression patterns have been obscure. In this study, to understand the relationship between the δ-crys mRNA-expressing region and RP formation, we examined the embryonic expression pattern of δ-crys mRNA in the primordium of the adenohypophysis. δ-crys mRNA expression was initially found at stage 15 anterior to the foregut and posterior to the invaginated oral ectoderm. After RP formation, the δ-crys mRNA was expressed in the post-ventral region of RP and the anterior region of RP. δ-crys mRNA expression was then restricted to the cephalic lobe of the pituitary gland. From stage 20, the δ-crys and alpha-glycoprotein subunit (αGSU) mRNA-expressing regions were almost completely overlapping. The αGSU mRNA-expressing region is thought to be the primordium of the pars tuberalis, and these regions were overlapped with the Lhx3 mRNA-expressing region. The intensity of δ-crys mRNA expression gradually decreased with development and completely disappeared by stage 34. These results suggest that the embryonic chick pituitary gland consists of two different regions labeled with δ-crys and Lhx3.

DOI： 10.1007/s10735-012-9407-1

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Motilin and ghrelin are the gastrointestinal (GI) hormones released in a fasting state to stimulate the GI motility of the migrating motor complex (MMC). We focused on coordination of the ghrelin/motilin family in gastric contraction in vivo and in vitro using the house musk shrew (Suncus murinus), a ghrelin- and motilin-producing mammal. To measure the contractile activity of the stomach in vivo, we recorded GI contractions either in the free-moving conscious or anesthetized S. murinus and examined the effects of administration of motilin and/or ghrelin on spontaneous MMC in the fasting state. In the in vitro study, we also studied the coordinative effect of these hormones on the isolated stomach using an organ bath. In the fasting state, phase I, II, and III contractions were clearly recorded in the gastric body (as observed in humans and dogs). Intravenous infusion of ghrelin stimulated gastric contraction in the latter half of phase I and in the phase II in a dose-dependent manner. Continuous intravenous infusion of ghrelin antagonist (d-Lys3-GHRP6) significantly suppressed spontaneous phase II contractions and prolonged the time of occurrence of the peak of phase III contractions. However, intravenous infusion of motilin antagonist (MA-2029) did not inhibit phase II contractions but delayed the occurrence of phase III contractions of the MMC. In the in vitro study, even though a high dose of ghrelin did not stimulate contraction of stomach preparations, ghrelin administration (10(-10)-10(-7) M) with pretreatment of a low dose of motilin (10(-10) M) induced gastric contraction in a dose-dependent manner. Pretreatment with 10(-8) M ghrelin enhanced motilin-stimulated gastric contractions by 10 times. The interrelation of these peptides was also demonstrated in the anesthetized S. murinus. The results suggest that ghrelin is important for the phase II contraction and that coordination of motilin and ghrelin are necessary to initiate phase III contraction of the MMC.

DOI： 10.1152/ajpgi.00379.2011

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

Thyroid-stimulating hormone (TSH)-producing cells of the pars tuberalis (PT) display distinct characteristics that differ from those of the pars distalis (PD). The mRNA expression of TSHβ and αGSU in PT has a circadian rhythm and is inhibited by melatonin via melatonin receptor type 1; however, the detailed regulatory mechanism for TSHβ expression in the PT remains unclear. To identify the factors that affect PT, a microarray analysis was performed on laser-captured PT tissue to screen for genes coding for receptors that are abundantly expressed in the PT. In the PT, we found high expression of the KA2, which is an ionotropic glutamic acid receptor (iGluR). In addition, the amino acid transporter A2 (ATA2), also known as the glutamine transporter, and glutaminase (GLS), as well as GLS2, were highly expressed in the PT compared to the PD. We examined the effects of glutamine and glutamic acid on TSHβ expression and αGSU expression in PT slice cultures. l-Glutamine and l-glutamic acid significantly stimulated TSHβ expression in PT slices after 2- and 4-h treatments, and the effect of l-glutamic acid was stronger than that of l-glutamine. In contrast, treatment with glutamine and glutamic acid did not affect αGSU expression in the PT or the expression of TSHβ or αGSU in the PD. These results strongly suggest that glutamine is taken up by PT cells through ATA2 and that glutamic acid locally converted from glutamine by Gls induces TSHβ expression via the KA2 in an autocrine and/or paracrine manner in the PT.

DOI： 10.1530/JOE-11-0388

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掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.bbrc.2009.08.129

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記述言語：日本語   出版者・発行元：(一社)日本内分泌学会  

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記述言語：日本語   出版者・発行元：(一社)日本内分泌学会  

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担当区分：筆頭著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1111/j.1365-2826.2007.01603.x

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J-GLOBAL

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J-GLOBAL

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J-GLOBAL

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記述言語：英語   掲載種別：研究発表ペーパー・要旨（国際会議）   出版者・発行元：W B SAUNDERS CO-ELSEVIER INC  

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記述言語：英語   掲載種別：研究発表ペーパー・要旨（国際会議）   出版者・発行元：W B SAUNDERS CO-ELSEVIER INC  

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記述言語：日本語   出版者・発行元：日本ハンセン病学会  

J-GLOBAL

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その他リンク： https://search.jamas.or.jp/index.php?module=Default&action=Link&pub_year=2009&ichushi_jid=J03339&link_issn=&doc_id=20090413200017&doc_link_id=%2Fcu3lepro%2F2009%2F007802%2F017%2F0138-0138%26dl%3D0&url=http%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Fcu3lepro%2F2009%2F007802%2F017%2F0138-0138%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

開催年月日： 2022年10月28日 - 2022年10月30日

会議種別：ポスター発表  

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開催年月日： 2022年9月8日 - 2022年9月10日

会議種別：口頭発表（一般）  

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開催年月日： 2022年9月8日 - 2022年9月10日

会議種別：口頭発表（一般）  

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開催年月日： 2022年5月21日 - 2022年5月22日

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開催年月日： 2019年10月12日 - 2019年10月13日

会議種別：ポスター発表  

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開催年月日： 2019年9月12日 - 2019年9月14日

会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（招待・特別）  

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会議種別：口頭発表（一般）  

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会議種別：ポスター発表  

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会議種別：口頭発表（一般）  

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会議種別：ポスター発表  

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会議種別：ポスター発表  

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会議種別：口頭発表（一般）  

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会議種別：口頭発表（一般）  

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会議種別：ポスター発表  

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会議種別：ポスター発表  

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会議種別：口頭発表（一般）  

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会議種別：口頭発表（一般）  

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会議種別：ポスター発表  

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会議種別：口頭発表（一般）  

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会議種別：ポスター発表  

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記述言語：英語   会議種別：ポスター発表  

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記述言語：英語  

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記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（公募）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：英語   会議種別：口頭発表（一般）  

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