scholarly journals c-fos gene expression is increased in the paraventricular hypothalamic nucleus of Sprague-Dawley rats With visceral pain induced by acetic acid without detectable changes of corticotrophin-releasing factor mRNA: A quantitative approach with an image analysis system

2007 ◽  
Vol 290 (4) ◽  
pp. 406-413 ◽  
Author(s):  
Bang H. Hwang ◽  
Hung-Ming Chang ◽  
Zhu-Hua Gu ◽  
Ryoji Suzuki
Keyword(s):  
Gene Expression ◽  
Acetic Acid ◽  
Visceral Pain ◽  
Hypothalamic Nucleus ◽  
Image Analysis System ◽  
Sprague Dawley ◽  
Paraventricular Hypothalamic Nucleus ◽  
Corticotrophin Releasing Factor ◽  
Sprague Dawley Rats ◽  
Analysis System

scholarly journals IMMUNOHISTOCHEMICAL IDENTIFICATION AND DISTRIBUTION OF GLUTAMATERGIC NMDA AND mGlu1 RECEPTORS IN THE PONTINE INTERTRIGEMINAL REGION IN RATS

2019 ◽  
pp. 064
Author(s):  
Milan Stoiljkovic
Keyword(s):  
Polyclonal Antibodies ◽  
Neuronal Cell ◽  
Image Analysis System ◽  
Sprague Dawley ◽  
Cardiorespiratory Control ◽  
Signal Distribution ◽  
Similar Expression Profile ◽  
Neuronal Cell Bodies ◽  
Sprague Dawley Rats ◽  
Analysis System

Local glutamate simulation of intertrigeminal region (ITR) in the lateral pons evoked immediate cardiovascular and respiratory effects proposing its role in central cardiorespiratory control. Since pharmacological studies provided only functional evidence for the existence of glutamate receptors in the ITR and thereby specifying putative neurochemical substrate involved in this control, here we employed immunohistochemistry to examine expression and distribution of NMDA and mGlu1 receptors in this structure. Thirty adult male Sprague-Dawley rats were perfuse-fixed, their brains frozen and cut into sequential series of 20 µm thick sections through the ITR. Immunohistochemistry was performed using polyclonal antibodies against NMDA-NR1, NMDA-NR2A and mGlu1 receptors. Labeled neurons in the ITR were analyzed using light microscope and computerized image analysis system for quantification of relative immunoreactivity as the mean of integrated optical density (IOD), and counting the immunopositive cells. Light microscopic analyses demonstrated NMDA-NR1-immunoreactivity mainly localized in the neuronal cell bodies with sparse distribution on primary dendrites, while NMDA-NR2A-immunoreactivity was basically somatically distributed. The mGlu1-immunoreactivity was moderate and observed both in neuronal bodies and primary dendrites or extracellular matrix suggesting somatodendritic localization. Quantitative analyses of IOD showed very strong expression of NMDA-NR1, weak of NMDA-NR2A and strong-to-moderate expression of mGluR1, with differences in immunostaining signal distribution over rostro-caudal span of the ITR. Counting of immunopositive cells followed similar expression profile. Our data directly confirm the presence of glutamatergic NMDA and mGlu1 receptors in the ITR apparently involved in signaling pathways by which this region modulates cardiorespiratory functions such as blood pressure, heart rate and breathing.

Quantitative and qualitative immunohistochemical detection of myc and src oncogene proteins in normal, nodule, and neoplastic rat liver.

1988 ◽  
Vol 36 (2) ◽  
pp. 179-184 ◽  
Author(s):  
R E Richmond ◽  
M A Pereira ◽  
J H Carter ◽  
H W Carter ◽  
R E Long
Keyword(s):  
Quantitative Method ◽  
Staining Pattern ◽  
Normal Liver ◽  
Image Analysis System ◽  
Immunohistochemical Detection ◽  
Sprague Dawley ◽  
Treatment Groups ◽  
Sprague Dawley Rats ◽  
Qualitative Technique ◽  
Analysis System

This study examined the possibility of using an immunohistochemical technique to detect the expression of myc and src oncogene proteins (ops) in livers of male Sprague-Dawley rats after treatment with the carcinogen diethylnitrosamine (with or without phenobarbital promotion) or untreated. We found that the majority of nodules and tumors from these livers stained for myc and src ops, indicating that myc and src expression did occur in these structures. These results were expected, since myc and src expression has been previously observed by others using different techniques. However, in our study, myc and src op staining was also noted in normal liver areas from rats in any of the four treatment groups (DENA, DENA + PB, PB alone, or untreated). The staining pattern of normal liver was different for each oncogene probe but was consistent within the four groups. In most cases, oncogene expression of normal liver occurred at sites of abnormal (but non-neoplastic) hepatocytes. The method reported here used both a qualitative technique of op expression analysis and a quantitative method using a Zeiss computer-driven image analysis system.

Local mechanisms for acupoint sensitization in gall bladder meridian of foot shaoyang-a gene chip study

2019 ◽  
Vol 44 (2) ◽  
pp. 77-87
Author(s):  
Koichi Ishida ◽  
Liyue Qin ◽  
Ting Wang ◽  
Ying Lei ◽  
Weiwei Hu ◽  
...  
Keyword(s):  
Gene Expression ◽  
Gall Bladder ◽  
Interleukin 1 ◽  
Gene Chip ◽  
Molecular Evidence ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Bladder Meridian ◽  
Integrin Linked Kinase ◽  
Necrosis Factor

Acupuncture manipulations are clinically important to traditional Chinese medicine, yet the biological mechanisms have not been fully understood. This study aimed to investigate continuous stimulation-induced gene expression changes at stimulated and non-stimulated adjacent acupoints in the same meridian. Catgut embedding into acupoint (CEP) was conducted at acupoint Yanglingquan (gall bladder meridian of foot-shaoyang 34, GB34) of Sprague Dawley rats once or continuously for eight weeks, and gene expression changes at GB34 were assessed by gene chip array analysis 72 h after the last CEP treatment. A total of 688 genes exhibited opposite changes in expression between the two treatments, and 1,336 genes were regulated only by the eight-week CEP treatment. Ingenuity Pathway Analysis revealed that among these differentially regulated genes by one-time and eight-week CEP treatment, insulin-like growth factor-1 pathway and integrin-linked kinase pathway, and Wnt/~ catenin signaling pathway match the observed gene changes to predicted up/down regulation patterns. Upstream analysis further predicted six molecules, namely, tumor necrosis factor, interleukin 1~, interleukin la, kallikrein-related peptidase 5, protein kinase Ca, and catenin ~1. On the other hand, continuous eight-week CEP stimulation at acupoint Xuanzhong (GB39) caused similar changes in the expression of 32 genes at acupoints GB34 and Fengshi (GB31) on the same meridian. Taken together, our results provide the first molecular evidence for the local acupoints' mechanisms for acupoint sensitization theory, and implicate the existence of signaling pathways, either direct or indirect, between acupoints within the meridian GB.

scholarly journals Differential Effects of Refeeding on Melanocortin-Responsive Neurons in the Hypothalamic Paraventricular Nucleus

Endocrinology ◽  
2008 ◽  
Vol 149 (9) ◽  
pp. 4329-4335 ◽  
Author(s):  
Edith Sánchez ◽  
Praful S. Singru ◽  
Runa Acharya ◽  
Monica Bodria ◽  
Csaba Fekete ◽  
...  
Keyword(s):  
Gene Expression ◽  
Paraventricular Nucleus ◽  
Hypothalamic Paraventricular Nucleus ◽  
Mrna Levels ◽  
Sprague Dawley ◽  
Early Action ◽  
Sprague Dawley Rats ◽  
Melanocortin Signaling ◽  
Agouti Related Protein ◽  
Serum Tsh

To explore the effect of refeeding on recovery of TRH gene expression in the hypothalamic paraventricular nucleus (PVN) and its correlation with the feeding-related neuropeptides in the arcuate nucleus (ARC), c-fos immunoreactivity (IR) in the PVN and ARC 2 h after refeeding and hypothalamic TRH, neuropeptide Y (NPY) and agouti-related protein (AGRP) mRNA levels 4, 12, and 24 h after refeeding were studied in Sprague-Dawley rats subjected to prolonged fasting. Despite rapid reactivation of proopiomelanocortin neurons by refeeding as demonstrated by c-fos IR in ARC α-MSH-IR neurons and ventral parvocellular subdivision PVN neurons, c-fos IR was present in only 9.7 ± 1.1% hypophysiotropic TRH neurons. Serum TSH levels remained suppressed 4 and 12 h after the start of refeeding, returning to fed levels after 24 h. Fasting reduced TRH mRNA compared with fed animals, and similar to TSH, remained suppressed at 4 and 12 h after refeeding, returning toward normal at 24 h. AGRP and NPY gene expression in the ARC were markedly elevated in fasting rats, AGRP mRNA returning to baseline levels 12 h after refeeding and NPY mRNA remaining persistently elevated even at 24 h. These data raise the possibility that refeeding-induced activation of melanocortin signaling exerts differential actions on its target neurons in the PVN, an early action directed at neurons that may be involved in satiety, and a later action on hypophysiotropic TRH neurons involved in energy expenditure, potentially mediated by sustained elevations in AGRP and NPY. This response may be an important homeostatic mechanism to allow replenishment of depleted energy stores associated with fasting.

Modulation of hepatic gene expression and DNA methylation in furan treated Sprague–Dawley rats

2009 ◽  
Vol 189 ◽  
pp. S137 ◽  
Author(s):  
Tao Chen ◽  
Kevin Hickling ◽  
Carolin Hamberger ◽  
Angela Mally ◽  
Kevin Chipman
Keyword(s):  
Gene Expression ◽  
Dna Methylation ◽  
Hepatic Gene Expression ◽  
Sprague Dawley ◽  
Sprague Dawley Rats
Sign in / Sign up

Export Citation Format

Share Document