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Acta Histochemica et Cytochemica

Toshihiro Miyazaki, Tomomi T Baba, Masako Mori, Toshihisa Komori
We previously reported that the terminal differentiation of odontoblasts was inhibited in Runx2 transgenic { Tg(Col1a1-Runx2) } mice under the control of the 2.3-kb Col1a1 promoter. Odontoblasts in Tg(Col1a1-Runx2) mice lose their characteristic long cellular processes, and show marked reductions in the protein levels of markers for odontoblasts, such as dentin sialophosphoprotein, nestin, and microtubule-associated protein tau (Mapt). We herein demonstrated that collapsin response mediator protein 1 (CRMP1), a neuronal phosphoprotein that participates in various aspects of neuronal development, was specifically expressed in the differentiated odontoblasts of wild-type, but not Tg(Col1a1-Runx2) tooth germs by comparing expression profiles in wild-type and Tg(Col1a1-Runx2) mouse molars using microarray and immunohistochemical analyses...
December 20, 2018: Acta Histochemica et Cytochemica
Yuki Izawa, Karin Kashii-Magaribuchi, Kana Yoshida, Mayu Nosaka, Nanami Tsuji, Ai Yamamoto, Kana Kuroyanagi, Kanoko Tono, Misato Tanihata, Moe Imanishi, Momoka Onishi, Mayu Sakiyama, Sana Inoue, Rei Takahashi
Vasculogenic mimicry (VM), referring to vasculogenic structures lined by tumor cells, can be distinguished from angiogenesis, and is responsible for the aggressiveness and metastatic potential of tumors. HCC1937/p53 cells were derived from triple-negative breast cancer (TNBC), and used to investigate the roles of breast cancer stem cells (CSCs) in the formation of VM. HCC1937/p53 cells formed mesh-like structures on matrigel culture in which expression of VM-related genes, vascular endothelial (VE)-cadherin, matrix metalloproteinase (MMP)-2 and MMP-9 was confirmed by droplet digital polymerase chain reaction (PCR)...
December 20, 2018: Acta Histochemica et Cytochemica
Igor Buchwalow, Jürgen Schnekenburger, Vera Samoilova, Werner Boecker, Joachim Neumann, Katharina Tiemann
Nitric oxide (NO) is generated by a family of enzymes termed NO synthases (NOS) that convert L-arginine to NO and citrulline. The role of NO as an important biological mediator and recognition of the pathophysiological significance of superoxides/NO interaction has led to an intensive research and development of therapies based on the interception of the NO signaling cascade in the pancreatitis course. However, the presence and localization of the NO-generating enzymes in various organs including pancreas are subject to controversy...
December 20, 2018: Acta Histochemica et Cytochemica
Gil-Hyun Kim, Hang-Gu Kim, Chang-Jin Jeon
The purpose of the present study was to investigate the organization of choline acetyltransferase (ChAT)-immunoreactive (IR) fibers in the visual cortex of the microbat, using standard immunocytochemistry and confocal microscopy. ChAT-IR fibers were distributed throughout all layers of the visual cortex, with the highest density in layer III and the lowest density in layer I. However, no ChAT-IR cells were found in the microbat visual cortex. ChAT-IR fibers were classified into two types: small and large varicose fibers...
October 31, 2018: Acta Histochemica et Cytochemica
Morio Azuma, Takehiro Tsukada, Takeshi Inagaki, Fujianti Casmad, Depicha Jindatip, Alimuddin Tofrizal, Rita Maliza, Khongorzul Batchuluun, Rahimi Syaidah, Nobuhiko Ohno, Ken Fujiwara, Motoshi Kikuchi, Takashi Yashiro
Laminin, a major basement membrane protein, comprises three subunit chains: α, β, and γ chains. Among these chains, only the laminin α chain is capable of signaling via laminin receptors. Although laminin isoforms containing the α5 chain were reported to be the first laminin produced during rat anterior pituitary gland development, the functions of these isoforms are unknown. We used immunohistochemical techniques to localize the laminin α5 chain and its specific receptor, basal cell adhesion molecule (BCAM), in fetal and adult pituitary gland...
October 31, 2018: Acta Histochemica et Cytochemica
Tasuku Hirayama
Intracellular labile iron is an iron species which is not or weakly bound to proteins and depicts an important effect on homeostatic regulation in cells. An excess or deficiency of iron can cause oxidative damage to key cellular biomolecules. The behavior and concentrations of labile iron are difficult to monitor, but the specific redox state of the Fe ions is relevant to the physiological and pathological properties that we would like to study. We have developed a series of turn-on type fluorescent probes that are highly selective to the labile Fe(II) ions, and we have tested their applications to cellular level imaging...
October 31, 2018: Acta Histochemica et Cytochemica
Ken Ichi Matsuda, Takashi Hashimoto, Mitsuhiro Kawata
The estrogen receptor (ER) is a ligand-dependent transcription factor that has two subtypes: ERα and ERβ. ERs regulate transcription of estrogen-responsive genes through interactions with multiple intranuclear components, such as cofactors and the nuclear matrix. Live cell imaging using fluorescent protein-labeled ERs has revealed that ligand-activated ERs are highly mobile in the nucleus, with transient association with the DNA and nuclear matrix. Scaffold attachment factor B (SAFB) 1 and its paralogue, SAFB2, are nuclear matrix-binding proteins that negatively modulate ERα-mediated transcription...
August 29, 2018: Acta Histochemica et Cytochemica
Kyoko Ibaraki, Makoto Mizuno, Hitomi Aoki, Ayumi Niwa, Ikuko Iwamoto, Akira Hara, Hidenori Tabata, Hidenori Ito, Koh-Ichi Nagata
ARHGEF9, also known as Collybistin, a guanine nucleotide exchange factor for Rho family GTPases, is thought to play an essential role in the mammalian brain. In this study, we prepared a specific polyclonal antibody against ARHGEF9, anti-ARHGEF9, and carried out expression analyses with mouse tissues especially brain. Western blotting analyses demonstrated tissue-dependent expression profiles of ARHGEF9 in the young adult mouse, and strongly suggested a role during brain development. Immunohistochemical analyses revealed developmental stage-dependent expression profiles of ARHGEF9 in cerebral cortex, hippocampus and cerebellum...
June 26, 2018: Acta Histochemica et Cytochemica
Shigeko Takeuchi, Ikuo Tooyama
The TRK-fused gene ( TFG ) is reported to be involved in the regulation of cell size, apoptosis, cell growth, ER-Golgi protein secretion, NF-κβ pathway signaling, the ubiquitin-proteasome system, and pancreatic β-cell mass and function. TFG mutations were reported in some neurodegenerative diseases affecting sensory and motor functions. However, the function of TFG in the nervous system and how TFG mutations lead to neurodegeneration remain unclear. In this study, we employed double immunohistochemistry to investigate the details of TFG localization patterns in monoaminergic and cholinergic neurons in the brainstem...
June 26, 2018: Acta Histochemica et Cytochemica
Yasuaki Kumamoto, Yoshinori Harada, Tetsuro Takamatsu, Hideo Tanaka
Raman scattering of a cell conveys the intrinsic information inherent to chemical structures of biomolecules. The spectroscopy of Raman scattering, or Raman spectroscopy, allows label-free and quantitative molecular sensing of a biological sample in situ without disruption. For the last five decades Raman spectroscopy has been widely utilized in biological research fields. However, it is just within the latest decade that molecular imaging and discrimination of living cells and tissues have become practically available...
June 26, 2018: Acta Histochemica et Cytochemica
Jin Liu, Wenchang Zhang, Zhiren Wu, Lei Dai, Takehiko Koji
For a better understanding of epigenetic regulation of cell differentiation, it is important to analyze DNA methylation at a specific site. In this study, we examined changes in the methylation level of CCGG and GATCG sites during mouse folliculogenesis in paraffin-embedded sections of mouse ovaries. For the purpose, we used a new method, histo endonuclease-linked detection of methylation sites of DNA (HELMET), designed to detect methylation sites of DNA with a specific sequence in a tissue section. Unlike the global level of DNA methylation, which was no change in immunohistochemical staining of 5-methylcytosine throughout folliculogenesis, we found that there were hypermethylation of CCGG and GATCG sites in most of the granulosa cells of tertiary follicles compared to that of primary and secondary follicles...
April 27, 2018: Acta Histochemica et Cytochemica
Yuji Tomori, Norio Iijima, Shuji Hinuma, Hirotaka Ishii, Ken Takumi, Shinro Takai, Hitoshi Ozawa
Liposomes, artificial phospholipid vesicles, have been developed as a non-viral drug delivery system to allow contained agents to be efficiently delivered to target sites via systemic circulation. Liposomes have been used as a gene transfer tool with cultured cells; however, their precise trafficking and processing remain uncertain. Furthermore, liposomes with different surface charges are known to exhibit distinct properties. The purpose of the current study was to elucidate the intracellular trafficking and processing of liposomes with anionic and cationic surface charges from a morphological view point...
April 27, 2018: Acta Histochemica et Cytochemica
Yulin Chen, Yoshiaki Yamaguchi, Toru Suzuki, Masao Doi, Hitoshi Okamura
Jet-lag symptoms arise from temporal misalignment between the internal circadian clock and external solar time when traveling across multiple time zones. Light is known as a strong timing cue of the circadian clock. We here examined the effect of daily light on the process of jet lag by detecting c-Fos expression in the master clock neurons in the suprachiasmatic nucleus (SCN) under 8-hr phase-advanced jet lag condition. In WT mice, c-Fos-immunoreactivity was found at 1-2 hours on the first day after light/dark (LD) phase-advance...
April 27, 2018: Acta Histochemica et Cytochemica
Yutaka Tsutsumi
In the diagnostic pathology practice, specimens for electron microscopy (EM) are not necessarily handled and fixed under the ideal condition. In the present article, the author describes ultrastructural study using formalin-fixed and/or paraffin-embedded material. The fine morphologic preservation is often acceptable, particularly when small cubes are dug out of paraffin blocks. Particulate structures such as neuroendocrine granules and microbes are consistently observed even using paraffin sections. Paraffin sections signalized with silver particles in Grimelius and Grocott stains or diaminobenzidine products in immunostaining and in situ hybridization are applicable to EM evaluation by using a pre-embedding sequence...
April 27, 2018: Acta Histochemica et Cytochemica
Younosuke Sato, Akira Matsuo, Shinji Kudoh, Liu Fang, Koki Hasegawa, Yohei Shinmyo, Takaaki Ito
Guidance molecules, such as Netrin-1, and their receptors have important roles in controlling axon pathfinding, modulate biological activities of various cancer cells, and may be a useful target for cancer therapy. Dorsal repulsive axon guidance protein (Draxin) is a novel guidance molecule that binds not only common guidance molecule receptors with Netrin-1, but also directly binds the EGF domain of Netrin-1 through a 22-amino-acid peptide (22aa). By immunostaining, Draxin was positively expressed in small cell carcinoma, adenocarcinoma (ADC), and squamous cell carcinoma of the lung...
February 27, 2018: Acta Histochemica et Cytochemica
Tomohiro Takenawa, Takenori Kanai, Tetsuya Kitamura, Yoshitaka Yoshimura, Yoshihiko Sawa, Junichiro Iida
This study investigates the significance of the expression and dynamics of podoplanin in mechanostress and mineralization in cultured murine osteoblasts. Podoplanin increased in osteoblasts subjected to straining in non-mineralization medium, suggesting that the mechanostress alone is a podoplanin induction factor. In osteoblasts subjected to vertical elongation straining in the mineralization medium, the mRNA amounts of podoplanin, osteopontin, and osteocalcin were significantly larger than those in cells not subjected to straining, suggesting that mechanostress is the cause of a synergistic effect in the expression of these proteins...
February 27, 2018: Acta Histochemica et Cytochemica
Mohmand Noor Ali, Narantsog Choijookhuu, Hideaki Takagi, Naparee Srisowanna, Mai Nguyen Nhat Huynh, Yuya Yamaguchi, Phyu Synn Oo, Myat Tin Htwe Kyaw, Katsuaki Sato, Ryoji Yamaguchi, Yoshitaka Hishikawa
Inflammatory bowel disease (IBD) is an inflammatory disorder of the gastrointestinal tract that is caused by multiple factors, including dysfunction of the immune system and genetic and epigenetic alterations. Aberrant epigenetic regulation, especially histone acetylation, was found in biopsies from IBD patients and mouse models of colitis, suggesting that an epigenetic treatment approach may be useful for IBD therapy. Therefore, we investigated the effects of the histone deacetylase (HDAC) inhibitor, suberoylanilide hydroxamic acid (SAHA), in a mouse model of dextran sulfate sodium (DSS)-induced colitis...
February 27, 2018: Acta Histochemica et Cytochemica
Phyu Synn Oo, Yuya Yamaguchi, Akira Sawaguchi, Myat Tin Htwe Kyaw, Narantsog Choijookhuu, Mohmand Noor Ali, Naparee Srisowanna, Shin-Ichiro Hino, Yoshitaka Hishikawa
Estrogen affects mitochondrial function in various tissues, but the precise mechanism remains unclear. We, therefore investigated the effect on estrogen-regulated mitochondrial morphology by dynamin-related protein 1 (Drp1) and its Ser616-phosphorylated derivative (pDrp1Ser616 ) are involved in mitochondrial fission. MCF7 human breast cancer cells were treated with 17β-estradiol (E2 ), an estrogen receptor (ER) α and β antagonist (ICI 182, 780), an ERα antagonist (MPP), and an ERβ antagonist (PHTPP) for 24 hr...
February 27, 2018: Acta Histochemica et Cytochemica
Sei Saitoh, Nobuhiko Ohno, Yurika Saitoh, Nobuo Terada, Satoshi Shimo, Kaoru Aida, Hideki Fujii, Tetsuro Kobayashi, Shinichi Ohno
Combined analysis of immunostaining for various biological molecules coupled with investigations of ultrastructural features of individual cells is a powerful approach for studies of cellular functions in normal and pathological conditions. However, weak antigenicity of tissues fixed by conventional methods poses a problem for immunoassays. This study introduces a method of correlative light and electron microscopy imaging of the same endocrine cells of compact and diffuse islets from human pancreatic tissue specimens...
February 27, 2018: Acta Histochemica et Cytochemica
Noriko Horii-Hayashi, Mayumi Nishi
Although the hypothalamus is classified into more than 10 compartments, it still contains uncharacterized areas. In this study, we identified a new triangular-shaped area between the paraventricular hypothalamic nucleus (PVN) and the fornix area in the mouse anterior hypothalamus, which is enriched in chondroitin sulfate proteoglycans (CSPGs). We designated this region as the perifornical area of the anterior hypothalamus (PeFAH) based on its anatomical location. As evidenced by Nissl staining, the PeFAH was distinguishable as an area of relatively low density...
February 27, 2018: Acta Histochemica et Cytochemica
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