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Yang Liu, Jinjin Zhang, Zhaoli Meng
The anti-tumor activity of a novel polysaccharide, PRG1-1, obtained from Russula griseocarnosa sporocarp was investigated in this paper. PRG1-1 has a molecular weight of 630kDa and was extracted and purified using DEAE-cellulose and gel filtration chromatography from crude polysaccharide extract of R. griseocarnosa sporocarp. PRG1-1 was composed of glucose, galactose, mannose, xylose and fructose, in a molar ratio of 66.5:29.2:3.17: 0.663:0.447, respectively. Purified PRG1-1 significantly reduced cell viability, increased the production of lactate dehydrogenase (LDH) and reactive oxygen species (ROS), and enhanced the apoptotic rate in HeLa and SiHa cells...
April 1, 2018: International Journal of Biological Macromolecules
Thomas Broggini, Lisa Schnell, Ali Ghoochani, José María Mateos, Michael Buchfelder, Kurt Wiendieck, Michael K Schäfer, Ilker Y Eyupoglu, Nicolai E Savaskan
The Plasticity Related Gene family covers five, brain-specific, transmembrane proteins (PRG1-5, also termed LPPR1-5) that operate in neuronal plasticity during development, aging and brain trauma. Here we investigated the role of the PRG family on axonal and filopodia outgrowth. Comparative analysis revealed the strongest outgrowth induced by PRG3 (LPPR1). During development, PRG3 is ubiquitously located at the tip of neuronal processes and at the plasma membrane and declines with age. In utero electroporation of PRG3 induced dendritic protrusions and accelerated spine formations in cortical pyramidal neurons...
October 15, 2016: Aging
Sandra Petzold, Babette Sommer, Andrea Kröber, Robert Nitsch, Herbert Schwegler, Johannes Vogt, Thomas Roskoden
The plasticity-related gene 1 (PRG1) modulates bioactive lipids at the postsynaptic density and is a novel player in neuronal plasticity and regulation of glutamatergic transmission at principal neurons. PRG1, a neuronal molecule, is highly expressed during development and regeneration processes at the postsynaptic density, modulates synaptic lysophosphatidic acid (LPA) levels and is related to epilepsy and brain injury. In the present study, we analyzed the interaction between the synaptic molecules PRG1 and LPA2R with other plasticity-related molecules the neurotrophins...
January 26, 2016: Neuroscience Letters
Tomio Hashimoto, Misa Yamada, Takashi Iwai, Akiyoshi Saitoh, Eri Hashimoto, Wataru Ukai, Toshikazu Saito, Mitsuhiko Yamada
Plasticity-related gene 1 (Prg1) is a membrane-associated lipid phosphate phosphatase. In this study, we first investigated the role of Prg1 in the survival of neurons derived from rat neural stem cells (NSCs) using small interfering RNA (siRNA). Prg1 knock-down decreased the cell number. Interestingly, Prg1 knock-down increased genomic DNA fragmentation, suggesting the possible induction of apoptosis. Exogenously expressed Prg1 rescued the cells from death and restored the loss of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) activity induced with Prg1 siRNA...
November 2013: Journal of Neuroscience Research
Ulf Strauss, Anja U Bräuer
Plasticity-related genes (PRGs, Lipid phosphate phosphatase-related proteins LPPRs) are a defined as a subclass of the lipid phosphate phosphatase (LPP) superfamily, comprising so far five brain- and vertebrate-specific membrane-spanning proteins. LPPs interfere with lipid phosphate signaling and are thereby involved in mediating the extracellular concentration and signal transduction of lipid phosphate esters such as lysophosphatidate (LPA) and spingosine-1 phosphate (S1P). LPPs dephosphorylate their substrates through extracellular catalytic domains, thus making them ecto-phosphatases...
January 2013: Biochimica et Biophysica Acta
Thomas Broggini, Robert Nitsch, Nic E Savaskan
Members of the plasticity-related gene (PRG1-4) family are brain-specific integral membrane proteins and implicated in neuronal plasticity, such as filopodia formation and axon growth after brain lesion. Here we report on the cloning of a novel member of the PRG family, PRG5, with high homologies to PRG3. PRG5 is regulated during brain and spinal cord development and is exclusively allocated within the nervous system. When introduced in neurons, PRG5 is distributed in the plasma membrane and induces filopodia as well as axon elongation and growth...
February 15, 2010: Molecular Biology of the Cell
Aaron J Schetter, Giang Huong Nguyen, Elise D Bowman, Ewy A Mathé, Siu Tsan Yuen, Jason E Hawkes, Carlo M Croce, Suet Yi Leung, Curtis C Harris
PURPOSE: Inflammatory genes and microRNAs have roles in colon carcinogenesis; therefore, they may provide useful biomarkers for colon cancer. This study examines the potential clinical utility of an inflammatory gene expression signature as a prognostic biomarker for colon cancer in addition to previously examined miR-21 expression. EXPERIMENTAL DESIGN: Quantitative reverse transcriptase-PCR. was used to measure the expression of 23 inflammatory genes in colon adenocarcinomas and adjacent noncancerous tissues from 196 patients...
September 15, 2009: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Linda P Jakobsen, Rehannah Borup, Janni Vestergaard, Lars A Larsen, Kasper Lage, Lisa Leth Maroun, Inger Kjaer, Carsten U Niemann, Mikael Andersen, Mary A Knudsen, Kjeld Møllgård, Niels Tommerup
Cleft lip and/or palate (CL/P) is a common congenital malformation with a complex etiology which is not fully elucidated yet. Epidemiological studies point to different etiologies in the cleft lip and palate subgroups, isolated cleft lip (CL), isolated cleft palate (CP) and combined cleft lip and palate (CLP). In order to understand the biological basis in these cleft lip and palate subgroups better we studied the expression profiles in human tissue from patients with CL/P. In each of the CL/P subgroups, samples were obtained from three patients and gene expression analysis was performed...
February 28, 2009: Experimental & Molecular Medicine
Misa Yamada, Yoshiko Shida, Kou Takahashi, Toshihiro Tanioka, Yasuko Nakano, Takashi Tobe, Mitsuhiko Yamada
Math2 (NEX-1/NeuroD6) is a member of the basic helix-loop-helix transcription factor family and is involved in neuronal differentiation and maturation. In this study, we identified the genes targeted by Math2 using DNA microarrays and cultured rat cortical cells transfected with Math2. Of the genes regulated by Math2, we focused on plasticity-related gene 1 (Prg1). Prg1 expression induced by Math2 was confirmed in cultured rat cortical cells and PC12 cells analyzed by real-time quantitative PCR. In the promoter region of rat Prg1, we identified four E-boxes [designated -E1 to -E4 (CANNTG)] recognized by the basic helix-loop-helix transcription factor...
September 2008: Journal of Neurochemistry
Susan Willi-Monnerat, Eugenia Migliavacca, Didier Surdez, Mauro Delorenzi, Ruth Luthi-Carter, Alexey V Terskikh
The elucidation of mechanisms underlying telencephalic neural development has been limited by the lack of knowledge regarding the molecular and cellular aspects of the ganglionic eminence (GE), an embryonic structure that supplies the brain with diverse sets of GABAergic neurons. Here, we report a comprehensive transcriptomic analysis of this structure including its medial (MGE), lateral (LGE) and caudal (CGE) subdivisions and its temporal dynamics in 12.5 to 16 day-old rat embryos. Surprisingly, comparison across subdivisions showed that CGE gene expression was the most unique providing unbiased genetic evidence for its differentiation from MGE and LGE...
April 2008: Molecular and Cellular Neurosciences
Akira Igarashi, Kazumi Segoshi, Yuhiro Sakai, Haiou Pan, Masami Kanawa, Yukihito Higashi, Masaru Sugiyama, Kozo Nakamura, Hidemi Kurihara, Satoru Yamaguchi, Koichiro Tsuji, Takeshi Kawamoto, Yukio Kato
Bone marrow stromal cells (BMSCs) are valuable in tissue engineering and cell therapy, but the quality of the cells is critical for the efficacy of therapy. To test the quality and identity of transplantable cells, we identified the molecular markers that were expressed at higher levels in BMSCs than in fibroblasts. Using numerous BMSC lines from tibia, femur, ilium, and jaw, together with skin and gum fibroblasts, we compared the gene expression profiles of these cells using DNA microarrays and low-density array cards...
October 2007: Tissue Engineering
Kalidou Ndiaye, Tania Fayad, David W Silversides, Jean Sirois, Jacques G Lussier
Molecular determinants and mechanisms involved in ovarian follicular growth, ovulation, and luteinization are not well understood. The objective of this study was to identify genes expressed in bovine granulosa cells (GC) of dominant follicles (DF) and downregulated after hCG-induced ovulation, using the suppression subtractive hybridization (SSH). GC were collected from DF at Day 5 of the estrous cycle and from ovulatory follicles (OF) obtained 23 h following injection of hCG. A subtracted cDNA library (DF-OF) was generated and screened using unsubtracted (DF, OF) and subtracted (DF-OF, OF-DF) cDNAs as complex (32)P-probes...
August 2005: Biology of Reproduction
W J Zhuang, C C Fong, J Cao, L Ao, C H Leung, H Y Cheung, P G Xiao, W F Fong, M S Yang
Tripterygium hypoglaucum (levl.) Hutch (Celastraceae) (THH) root is a Chinese medicinal herb commonly used for treating autoimmune diseases. In the present study, alkaloids of THH were prepared and their cytotoxicity against the HL-60 cell was investigated. THH-induced apoptosis was observed using flow cytometry, confocal fluorescence microscope, and DNA laddering and caspase assays. The molecular mechanism involved in the induction of HL-60 cell apoptosis by THH alkaloids was examined using cDNA microarrays containing 3000 human genes derived from a leukocyte cDNA library...
2004: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
Aigang Lu, Yang Tang, Ruiqiong Ran, Joseph F Clark, Bruce J Aronow, Frank R Sharp
Understanding transcriptional changes in brain after ischemia may provide therapeutic targets for treating stroke and promoting recovery. To study these changes on a genomic scale, oligonucleotide arrays were used to assess RNA samples from periinfarction cortex of adult Sprague-Dawley rats 24 h after permanent middle cerebral artery occlusions. Of the 328 regulated transcripts in ischemia compared with sham-operated animals, 264 were upregulated, 64 were downregulated, and 163 (49.7%) had not been reported in stroke...
July 2003: Journal of Cerebral Blood Flow and Metabolism
Willard J Costain, Ram K Mishra
Central dopaminergic systems are implicated in schizophrenia and Parkinson's disease, and are known to be modulated by the endogenous tripeptide Pro-Leu-Gly-NH(2) (PLG or MIF-1, melanocyte-stimulating hormone release inhibiting factor-1). Differential display polymerase chain reaction (ddPCR) was utilized to identify genes that are regulated by protracted PLG treatment (20 mg/kg, i.p. for 28 days) in male Sprague-Dawley rats. A total of 2400 genes were screened and 3 down-regulated bands were identified in the PLG-treated samples...
January 2003: Peptides
Kozo Furushima, Kazuki Shimo-Onoda, Shingo Maeda, Takahiro Nobukuni, Katsunori Ikari, Hiroaki Koga, Setsuro Komiya, Toshiaki Nakajima, Seiko Harata, Ituro Inoue
Ossification of the posterior longitudinal ligament of the spine (OPLL) is the predominant myelopathy among Japanese, and is usually diagnosed by ectopic bone formation in the paravertebral ligament in Japanese and other Asians. To detect genetic determinants associated with OPLL, we performed an extensive nonparametric linkage study with 126 affected sib-pairs using markers for various candidate genes by distinct analyses, SIBPAL and GENEHUNTER. Eighty-eight candidate genes were selected by comparing the genes identified by complementary DNA (cDNA) microarray analysis of systematic gene expression profiles during osteoblastic differentiation of human mesenchymal stem cells with the genes known to be involved in bone metabolism...
January 2002: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
A Arlt, O Grobe, A Sieke, M L Kruse, U R Fölsch, W E Schmidt, H Schäfer
P22PRG1/IEX-1 is a putative NF-kappaB target gene implicated in the regulation of cellular viability. Here, we show that in HeLa cells TNFalpha induces expression of p22PRG1/IEX-1 in an NF-kappaB dependent fashion. Blockade of NF-kappaB activation by various NF-kappaB inhibitors abolished TNFalpha-induced p22PRG1/IEX-1 expression and increased the sensitivity to apoptosis induced by TNFalpha, an activating Fas-antibody or the anti-cancer drug etoposide. Surprisingly, ectopic expression of p22PRG1/IEX-1 in HeLa cells transfected with an inducible p22PRG1/IEX-1-expression vector augments the susceptibility to apoptosis initiated by death-receptor ligands or by etoposide...
January 4, 2001: Oncogene
H Schäfer, A Arlt, A Trauzold, A Hünermann-Jansen, W E Schmidt
IEX-1L has been claimed to act as an apoptosis inhibitor involved in NFkappaB-mediated survival in Jurkat cells [Wu et al. (1998) Science 281, 998-1001]. It represents a mutant nonspliced variant of the early response gene p22(PRG1/IEX-1) exhibiting one insertion and two deletions compared to the genomic sequence of p22(PRG1/IEX-1). Direct DNA sequencing of PCR products generated from human genomic DNA only detected the regular genomic sequence of p22(PRG1/IEX-1). No IEX-1L mRNA could be identified by RT-PCR analysis and subsequent DNA sequencing of total, nuclear, or cytoplasmic RNA fractions from PMA-stimulated Jurkat cells...
August 19, 1999: Biochemical and Biophysical Research Communications
W E Schmidt, A Arlt, A Trauzold, H Schäfer
No abstract text is available yet for this article.
June 30, 1999: Annals of the New York Academy of Sciences
H Schäfer, P Lettau, A Trauzold, M Banasch, W E Schmidt
p22/PACAP response gene-1 (PRG1) is a novel rat early response gene expressed during induction of proliferation and stress response. In humans, a homolog of p22/PRG1, designated IEX-1/DIF-2, exists, yet the exact function of this gene remains elusive. To characterize the expression of p22/PRG1 in human cancers, we analyzed the expression of p22/PRG1 in the human pancreatic carcinoma cell lines 818-4, PT45, and PancTu1. Serum or growth factors, like epidermal growth factor (EGF) and hepatocyte growth factor (HGF), rapidly and transiently induced transcription of p22/PRG1 in these cells, correlating with the mitogenic response...
May 1999: Pancreas
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