Project description:Differential gene expression in the salivary gland during development and onset of xerostomia in Sjögren’s syndrome-like disease of the C57BL/6.NOD-Aec1Aec2 mouse. Recently, we reported the development of the C57BL/6.NOD-Aec1Aec2 mouse that carries two genetic intervals derived from the NOD mouse capable of conferring Sjögren’s syndrome (SjS)-like disease in SjS-non-susceptible C57BL/6 mice. In an attempt to define the molecular bases underlying onset of stomatitis sicca (xerostomia) in this C57BL/6.NOD-Aec1Aec2 mouse model, we have carried out a study utilizing microarray technology.
Project description:Differential gene expression in the salivary gland during development and onset of xerostomia in SjM-CM-6grenM-bM-^@M-^Ys syndrome-like disease of the C57BL/6.NOD-Aec1Aec2 mouse. Recently, we reported the development of the C57BL/6.NOD-Aec1Aec2 mouse that carries two genetic intervals derived from the NOD mouse capable of conferring SjM-CM-6grenM-bM-^@M-^Ys syndrome (SjS)-like disease in SjS-non-susceptible C57BL/6 mice. In an attempt to define the molecular bases underlying onset of stomatitis sicca (xerostomia) in this C57BL/6.NOD-Aec1Aec2 mouse model, we have carried out a study utilizing microarray technology. The present study was designed to define the changing gene expression profiles within the salivary glands of C57BL/6.NOD-Aec1Aec2 mice at five time points representing a pre-disease stage (4 weeks), the early pre-clinical stage (8 weeks), the initial influx of leukocytes into the salivary glands (12 weeks), the early clinical phase of autoimmunity (16 weeks), and the early onset of clinical SjSlike disease characterized by secretory dysfunction (20 weeks). The C57BL/6.NOD-Aec1Aec2 mouse is a model of primary SjS in which the Idd3 region of chromosome 3 and the Idd5 region of chromosome 1 derived from the NOD mouse were bred into the non-autoimmune C57BL/6 mouse, resulting in a SjS-like disease susceptibility that mimics both the pathophysiological characteristics and reduced secretory responses observed with NOD mice during development and onset of disease. This SjS-susceptible strain was designated C57BL/6.NOD-Aec1Aec2, where Aec1 corresponds to Idd3 (of chromosome 3) and Aec2 corresponds to Idd5 (of chromosome 1).
Project description:Primary Sjögren’s syndrome (pSS) is a chronic autoimmune disease that is estimated to affect 35 million people worldwide. Currently, no effective treatments exist for Sjögren’s syndrome, and there is a limited understanding of the physiological mechanisms associated with xerostomia and hyposalivation. The present work revealed that aquaporin 5 expression, a water channel critical for salivary gland fluid secretion, is regulated by bone morphogenetic protein 6. In- creased expression of this cytokine is strongly associated with the most common symptom of primary Sjögren’s syndrome, the loss of salivary gland function. This finding led us to develop a novel ther- apy in the treatment of Sjögren’s syndrome by increasing the water permeability of the gland to restore saliva flow. Our study demon- strates that the targeted increase of gland permeability not only resulted in the restoration of secretory gland function but also re- solved the hallmark salivary gland inflammation and systemic inflam- mation associated with disease. Secretory function also increased in the lacrimal gland, suggesting this local therapy could treat the sys- temic symptoms associated with primary Sjögren’s syndrome.
Project description:Genome wide DNA methylation profiling of human labial salivary gland (LSG) biopsy samples obtained from 28 female members of the Sjögren's International Collaborative Clinical Alliance (SICCA) Registry. The Illumina HumanMethylation450 BeadChip platform was used to obtain DNA methylation profiles across more than 450,000 highly informative CpG sites. Samples included 15 non-case glands, and 13 glands from patients with Sjögren's Syndrome.
Project description:Salivary gland hypofunction is a common adverse effect during and after radiotherapy of head and neck cancers, resulting in the dry mouth syndrome called xerostomia. Previous studies suggested that the functionality of the salivary gland is under the regulation of the circadian clock, however, the extent and scope of this regulation remains unexplored. Here, we profiled the diurnal fluctuation of gene expression in the mouse submandibular salivary gland. We further analyzed the regulatory role of key circadian transcription factors Bmal1, Nr1d1 (Rev-erba), and Dbp, which revealed a wide range of potential down-stream target genes. The circadian clock was disrupted upon irradiation, as revealed by gene expression analysis. We propose that the mechanism of salivary gland hypofunction in radiotherapy involves perturbation of the circadian clock.
Project description:Ionizing radiation (IR) – induced salivary gland damage is a common adverse effect in radiotherapy for patients with head and neck cancers. Currently, there is no effective treatment for the resulting salivary gland hypofunction and xerostomia (dry mouth). Here we profiled the acute gene expression change in the mouse submandibular salivary gland, and defined its damage response patterns at the transcriptome level.
Project description:Recently, we reported the development of the C57BL/6.NOD-Aec1Aec2 mouse that carries two genetic intervals derived from the NOD mouse capable of conferring Sjögren’s syndrome (SjS)-like disease in SjS-non-susceptible C57BL/6 mice. In an attempt to define the molecular bases underlying onset of stomatitis sicca (xerostomia) in this C57BL/6.NOD-Aec1Aec2 mouse model, we have carried out a study utilizing genomic microarray technology.
Project description:The C57BL/6.NOD-Aec1Aec2 mouse is a model for primary SjM-CM-6grenM-bM-^@M-^Ys syndrome and was constructed by introducing two genetic intervals derived from the NOD mouse that confers SjM-CM-6grenM-bM-^@M-^Ys syndrome (SjS)-like disease in SjS-non-susceptible C57BL/6 mice. To define the chronological interrelationships of biological themes associated with progression from pre- to sub-clinical to overt spontaneous experimental SjS-like disease involving the extracellular milieu (EM) of the salivary glands, we carried out a study utilizing microarray technology in which the parental C57BL/6J mouse was used as the healthy control strain. A bioinformatics-based data analysis methodology designed for comprehensive visualization of global datasets between C57BL/6J and C57BL/6.NOD-Aec1Aec2 mice has permitted a definition of the molecular changes that correlate with onset of stomatitis sicca (xerostomia) in the SjS-susceptible mice. The transcriptome data set of C57BL/6J permitted identification of normal physiological activity. The study was designed to define the changing gene expression profiles within the salivary glands of C57BL/6.NOD-Aec1Aec2 mice at multiple time points representing a pre-disease stage (4 weeks), the early pre-clinical stage (8 weeks), the initial influx of leukocytes into the salivary glands (12 weeks), and the early clinical phase of autoimmunity (16 weeks) to characterize the influence of the extracellular milieu on early development of disease. Because the C57BL/6.NOD-Aec1Aec2 mouse was derived from the C57BL/6J line, C57BL/6J mice were used as the comparative healthy controls. This comparison permitted the identification of disease-associated gene expressions by subtracting out normal physiological processes. This present study represents the C57BL/6J healthy control mice. Series GSE15640 includes the data for the C57BL/6.NOD-Aec1Aec2 mice.
Project description:The C57BL/6.NOD-Aec1Aec2 mouse is a model for primary Sjögren’s syndrome and was constructed by introducing two genetic intervals derived from the NOD mouse that confers Sjögren’s syndrome (SjS)-like disease in SjS-non-susceptible C57BL/6 mice. To define the chronological interrelationships of biological themes associated with progression from pre- to sub-clinical to overt spontaneous experimental SjS-like disease involving the extracellular milieu (EM) of the salivary glands, we carried out a study utilizing microarray technology in which the parental C57BL/6J mouse was used as the healthy control strain. A bioinformatics-based data analysis methodology designed for comprehensive visualization of global datasets between C57BL/6J and C57BL/6.NOD-Aec1Aec2 mice has permitted a definition of the molecular changes that correlate with onset of stomatitis sicca (xerostomia) in the SjS-susceptible mice. The transcriptome data set of C57BL/6J permitted identification of normal physiological activity.