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Zheng H, Patel TA, Liu X, Patel KP. C-type natriuretic peptide (CNP) in the paraventricular nucleus-mediated renal sympatho-inhibition. Front Physiol 2023; 14:1162699. [PMID: 37082246 PMCID: PMC10110992 DOI: 10.3389/fphys.2023.1162699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 03/21/2023] [Indexed: 04/07/2023] Open
Abstract
Volume reflex produces sympatho-inhibition that is mediated by the hypothalamic paraventricular nucleus (PVN). However, the mechanisms for the sympatho-inhibitory role of the PVN and the neurochemical factors involved remain to be identified. In this study, we proposed C-type natriuretic peptide (CNP) as a potential mediator of this sympatho-inhibition within the PVN. Microinjection of CNP (1.0 μg) into the PVN significantly decreased renal sympathetic nerve activity (RSNA) (−25.8% ± 1.8% vs. −3.6% ± 1.5%), mean arterial pressure (−15.0 ± 1.9 vs. −0.1 ± 0.9 mmHg) and heart rate (−23.6 ± 3.5 vs. −0.3 ± 0.9 beats/min) compared with microinjection of vehicle. Picoinjection of CNP significantly decreased the basal discharge of extracellular single-unit recordings in 5/6 (83%) rostral ventrolateral medulla (RVLM)-projecting PVN neurons and in 6/13 (46%) of the neurons that were not antidromically activated from the RVLM. We also observed that natriuretic peptide receptor type C (NPR-C) was present on the RVLM projecting PVN neurons detected by dual-labeling with retrograde tracer. Prior NPR-C siRNA microinjection into the PVN significantly blunted the decrease in RSNA to CNP microinjections into the PVN. Volume expansion-mediated reduction in RSNA was significantly blunted by prior administration of NPR-C siRNA into the PVN. These results suggest a potential role for CNP within the PVN in regulating RSNA, specifically under physiological conditions of alterations in fluid balance.
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Affiliation(s)
- Hong Zheng
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, SD, United States
- *Correspondence: Hong Zheng,
| | - Tapan A. Patel
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, United States
| | - Xuefei Liu
- Division of Basic Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, SD, United States
| | - Kaushik P. Patel
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, United States
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Fourier Transform Infrared Imaging-A Novel Approach to Monitor Bio Molecular Changes in Subacute Mild Traumatic Brain Injury. Brain Sci 2021; 11:brainsci11070918. [PMID: 34356152 PMCID: PMC8307811 DOI: 10.3390/brainsci11070918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Revised: 06/28/2021] [Accepted: 07/02/2021] [Indexed: 11/26/2022] Open
Abstract
Traumatic brain injury (TBI) can be defined as a disorder in the function of the brain after a bump, blow, or jolt to the head, or penetrating head injury. Mild traumatic brain injury (mTBI) can cause devastating effects, such as the initiation of long-term neurodegeneration in brain tissue. In the current study, the effects of mTBI were investigated on rat brain regions; cortex (Co) and corpus callosum (CC) after 24 h (subacute trauma) by Fourier transform infrared (FTIR) imaging and immunohistochemistry (IHC). IHC studies showed the formation of amyloid-β (Aβ) plaques in the cortex brain region of mTBI rats. Moreover, staining of myelin basic protein presented the shearing of axons in CC region in the same group of animals. According to FTIR imaging results, total protein and lipid content significantly decreased in both Co and CC regions in mTBI group compared to the control. Due to this significant decrease in both lipid and protein content, remarkable consistency in lipid/protein band ratio in mTBI and control group, was observed. Significant decrease in methyl content and a significant increase in olefinic content were observed in Co and CC regions of mTBI rat brain tissues. Classification amongst distinguishable groups was performed using principal component analysis (PCA) and hierarchical clustering (HCA). This study established the prospective of FTIR imaging for assessing biochemical changes due to mTBI with high sensitivity, precision and high-resolution.
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Gong J, Chai L, Xu G, Ni Y, Liu D. The expression of natriuretic peptide receptors in developing zebrafish embryos. Gene Expr Patterns 2018; 29:65-71. [DOI: 10.1016/j.gep.2018.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 06/17/2018] [Accepted: 07/04/2018] [Indexed: 01/14/2023]
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Abdelalim EM, Bellier JP, Tooyama I. Localization of Brain Natriuretic Peptide Immunoreactivity in Rat Spinal Cord. Front Neuroanat 2016; 10:116. [PMID: 27994541 PMCID: PMC5133262 DOI: 10.3389/fnana.2016.00116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 11/18/2016] [Indexed: 12/31/2022] Open
Abstract
Brain natriuretic peptide (BNP) exerts its functions through NP receptors. Recently, BNP has been shown to be involved in a wide range of functions. Previous studies reported BNP expression in the sensory afferent fibers in the dorsal horn (DH) of the spinal cord. However, BNP expression and function in the neurons of the central nervous system are still controversial. Therefore, in this study, we investigated BNP expression in the rat spinal cord in detail using reverse transcription-polymerase chain reaction (RT-PCR) and immunohistochemistry. RT-PCR analysis showed that BNP mRNA was present in the spinal cord and dorsal root ganglion (DRG). BNP immunoreactivity was observed in different structures of the spinal cord, including the neuronal cell bodies and neuronal processes. BNP immunoreactivity was observed in the DH of the spinal cord and in the neurons of the intermediate column (IC) and ventral horn (VH). Double-immunolabeling showed a high level of BNP expression in the afferent fibers (laminae I–II) labeled with calcitonin gene-related peptide (CGRP), suggesting BNP involvement in sensory function. In addition, BNP was co-localized with CGRP and choline acetyltransferase (ChAT) in the motor neurons of the VH. Together, these results indicate that BNP is expressed in sensory and motor systems of the spinal cord, suggesting its involvement in several biological actions on sensory and motor neurons via its binding to NP receptor-A (NPR-A) and/or NP receptor-B (NPR-B) at the spinal cord level.
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Affiliation(s)
- Essam M Abdelalim
- Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Qatar FoundationDoha, Qatar; Molecular Neuroscience Research Center, Shiga University of Medical ScienceOtsu, Japan; Department of Cytology and Histology, Faculty of Veterinary Medicine, Suez Canal UniversityIsmailia, Egypt
| | - Jean-Pierre Bellier
- Molecular Neuroscience Research Center, Shiga University of Medical Science Otsu, Japan
| | - Ikuo Tooyama
- Molecular Neuroscience Research Center, Shiga University of Medical Science Otsu, Japan
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Mahinrad S, de Craen AJM, Yasar S, van Heemst D, Sabayan B. Natriuretic peptides in the central nervous system: Novel targets for cognitive impairment. Neurosci Biobehav Rev 2016; 68:148-156. [PMID: 27229760 DOI: 10.1016/j.neubiorev.2016.05.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 04/22/2016] [Accepted: 05/22/2016] [Indexed: 02/06/2023]
Abstract
Natriuretic peptides (NPs) are traditionally known as cardiac hormones with diuretic, natriuretic and blood pressure lowering properties. Evidence indicates that NPs and their receptors are abundant in the central nervous system, suggesting their involvement in regulation of various brain functions. It has been shown that NPs are involved in the regulation of neurovascular and blood-brain barrier integrity, neuro-inflammation, neuroprotection, synaptic transmission and brain fluid homeostasis. In addition, NPs might contribute to the brain's inhibitory control over the hypothalamic-pituitary-adrenal axis. Studies have also shown that high systemic levels of NPs are associated with cognitive impairment independent of cardiovascular risk factors. In this review we discuss the potential roles of NPs in regulating structural and functional integrity of the brain. Based on the available neurobiological and clinical evidence, we propose that NPs might represent as potential novel diagnostic and therapeutic targets for cognitive impairment.
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Affiliation(s)
- Simin Mahinrad
- Department of Gerontology and Geriatrics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, the Netherlands.
| | - Anton J M de Craen
- Department of Gerontology and Geriatrics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, the Netherlands.
| | - Sevil Yasar
- Department of Medicine, Division of Geriatric Medicine and Gerontology, Johns Hopkins University School of Medicine, 5200 Eastern Avenue, MFL Center tower, Baltimore, MD 21224, United States.
| | - Diana van Heemst
- Department of Gerontology and Geriatrics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, the Netherlands.
| | - Behnam Sabayan
- Department of Gerontology and Geriatrics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, the Netherlands; Department of Radiology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, the Netherlands.
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Guo S, Barringer F, Zois NE, Goetze JP, Ashina M. Natriuretic peptides and cerebral hemodynamics. ACTA ACUST UNITED AC 2014; 192-193:15-23. [DOI: 10.1016/j.regpep.2014.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 07/08/2014] [Accepted: 07/23/2014] [Indexed: 12/26/2022]
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Vilotti S, Marchenkova A, Ntamati N, Nistri A. B-type natriuretic peptide-induced delayed modulation of TRPV1 and P2X3 receptors of mouse trigeminal sensory neurons. PLoS One 2013; 8:e81138. [PMID: 24312267 PMCID: PMC3842315 DOI: 10.1371/journal.pone.0081138] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 10/18/2013] [Indexed: 01/24/2023] Open
Abstract
Important pain transducers of noxious stimuli are small- and medium-diameter sensory neurons that express transient receptor vanilloid-1 (TRPV1) channels and/or adenosine triphosphate (ATP)-gated P2X3 receptors whose activity is upregulated by endogenous neuropeptides in acute and chronic pain models. Little is known about the role of endogenous modulators in restraining the expression and function of TRPV1 and P2X3 receptors. In dorsal root ganglia, evidence supports the involvement of the natriuretic peptide system in the modulation of nociceptive transmission especially via the B-type natriuretic peptide (BNP) that activates the natriuretic peptide receptor-A (NPR-A) to downregulate sensory neuron excitability. Since the role of BNP in trigeminal ganglia (TG) is unclear, we investigated the expression of BNP in mouse TG in situ or in primary cultures and its effect on P2X3 and TRPV1 receptors of patch-clamped cultured neurons. Against scant expression of BNP, almost all neurons expressed NPR-A at membrane level. While BNP rapidly increased cGMP production and Akt kinase phosphorylation, there was no early change in passive neuronal properties or responses to capsaicin, α,β-meATP or GABA. Nonetheless, 24 h application of BNP depressed TRPV1 mediated currents (an effect blocked by the NPR-A antagonist anantin) without changing responses to α,β-meATP or GABA. Anantin alone decreased basal cGMP production and enhanced control α,β-meATP-evoked responses, implying constitutive regulation of P2X3 receptors by ambient BNP. These data suggest a slow modulatory action by BNP on TRPV1 and P2X3 receptors outlining the role of this peptide as a negative regulator of trigeminal sensory neuron excitability to nociceptive stimuli.
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Affiliation(s)
- Sandra Vilotti
- Neuroscience Department, International School for Advanced Studies (SISSA), Trieste, Italy
| | - Anna Marchenkova
- Neuroscience Department, International School for Advanced Studies (SISSA), Trieste, Italy
| | - Niels Ntamati
- Neuroscience Department, International School for Advanced Studies (SISSA), Trieste, Italy
| | - Andrea Nistri
- Neuroscience Department, International School for Advanced Studies (SISSA), Trieste, Italy
- * E-mail:
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Abdelalim EM, Bellier JP, Tooyama I. Expression of NPR-B in neurons of the dorsal root ganglia of the rat. Peptides 2013; 43:56-61. [PMID: 23454171 DOI: 10.1016/j.peptides.2013.02.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 02/16/2013] [Accepted: 02/18/2013] [Indexed: 12/17/2022]
Abstract
C-type natriuretic peptide (CNP) is an abundant neuropeptide in the central nervous system, which exerts its physiological effects through natriuretic peptide receptor B (NPR-B). Recently, the CNP/NPR-B system has been recognized as an important regulator for the development of sensory axons. The dorsal root ganglion (DRG) contains neurons transmitting several kinds of spinal sensory stimuli to the central nervous system. In this study, we characterized NPR-B receptor expression in the rat DRG, using reverse transcription-polymerase chain reaction, Western blotting and immunohistochemistry. Immunostaining revealed that NPR-B was expressed in neuronal cell bodies and processes of the DRG, with NPR-B immunoreactivity mainly prominent in small and medium-sized DRG neurons. Double-immunolabeling showed that NPR-B was expressed in calcitonin gene-related peptide- and isolectin B4-positive neurons. Furthermore, NPR-B expression was co-localized with calcitonin gene-related peptide in the dorsal horn of the spinal cord. Together, our data suggest that the natriuretic peptides may perform several biological actions on sensory neurons via their binding to NPR-B in the DRG.
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Affiliation(s)
- Essam M Abdelalim
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Shiga 520-2192, Japan.
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Abdelalim EM, Tooyama I. NPR-C Protects Embryonic Stem Cells from Apoptosis by Regulating p53 Levels. Stem Cells Dev 2012; 21:1264-71. [DOI: 10.1089/scd.2011.0239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Essam M. Abdelalim
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Setatsukinowa-cho, Otsu, Japan
- Department of Cytology and Histology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Ikuo Tooyama
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Setatsukinowa-cho, Otsu, Japan
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Mapping of NPR-B immunoreactivity in the brainstem of Macaca fascicularis. Brain Struct Funct 2011; 216:387-402. [DOI: 10.1007/s00429-011-0313-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 03/21/2011] [Indexed: 11/25/2022]
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11
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Sienkiewicz W, Dudek A, Kaleczyc J, Chrószcz A. Immunohistochemical Characterization of Neurones in the Hypoglossal Nucleus of the Pig. Anat Histol Embryol 2010; 39:152-9. [DOI: 10.1111/j.1439-0264.2009.00989.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Abdelalim EM, Tooyama I. NPR-C is expressed in the cholinergic and dopaminergic amacrine cells in the rat retina. Peptides 2010; 31:180-3. [PMID: 19878700 DOI: 10.1016/j.peptides.2009.10.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Revised: 10/16/2009] [Accepted: 10/16/2009] [Indexed: 11/19/2022]
Abstract
Natriuretic peptide receptor C (NPR-C) is known to bind all natriuretic peptides with similar affinity. Given their biological role it is interesting that natriuretic peptides and their activated guanylate cyclases (NPR-A and NPR-B) are expressed in retinal amacrine cells. The purpose of this study is to examine the presence of NPR-C in the rat retina and its relationship to cholinergic and dopaminergic amacrine cells using immunofluorescence techniques. NPR-C immunoreactivity was found in several layers of the retina including the ganglion cell layer (GCL), inner nuclear layer (INL), outer plexiform layer (OPL), and inner segments of photoreceptors (IS). Immunofluorescence double-labeling showed the co-localization of NPR-C with tyrosine hydroxylase, a marker of dopaminergic cells, and with choline acetyltransferase (ChAT), a marker of cholinergic cells. These data suggest that natriuretic peptides may play a role in maintaining the retinal functions via interaction with NPR-C.
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Affiliation(s)
- Essam Mohamed Abdelalim
- Molecular Neuroscience Research Center, Shiga University of Medical Science, Otsu, Shiga, Japan.
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