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Cignarella A, Vegeto E, Bolego C, Trabace L, Conti L, Ortona E. Sex-oriented perspectives in immunopharmacology. Pharmacol Res 2023; 197:106956. [PMID: 37820857 DOI: 10.1016/j.phrs.2023.106956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/27/2023] [Accepted: 10/08/2023] [Indexed: 10/13/2023]
Abstract
Several immunopharmacological agents are effective in the treatment of cancer and immune-mediated conditions, with a favorable impact on life expectancy and clinical outcomes for a large number of patients. Nevertheless, response variation and undesirable effects of these drugs represent major issues, and overall efficacy remains unpredictable. Males and females show a distinct difference in immune system responses, with females generally mounting stronger responses to a variety of stimuli. Therefore, exploring sex differences in the efficacy and safety of immunopharmacological agents would strengthen the practice of precision medicine. As a pharmacological target highlight, programmed cell death 1 ligand 1 (PD-L1) is the first functionally characterized ligand of the coinhibitory programmed death receptor 1 (PD-1). The PD-L1/PD-1 crosstalk plays an important role in the immune response and is relevant in cancer, infectious and autoimmune disease. Sex differences in the response to immune checkpoint inhibitors are well documented, with male patients responding better than female patients. Similarly, higher efficacy of and adherence to tumor necrosis factor inhibitors in chronic inflammatory conditions including rheumatoid arthritis and Crohn's disease have been reported in male patients. The pharmacological basis of sex-specific responses to immune system modulating drugs is actively investigated in other settings such as stroke and type 1 diabetes. Advances in therapeutics targeting the endothelium could soon be wielded against autoimmunity and metabolic disorders. Based on the established sexual dimorphism in immune-related pathophysiology and disease presentation, sex-specific immunopharmacological protocols should be integrated into clinical guidelines.
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Affiliation(s)
| | - Elisabetta Vegeto
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Chiara Bolego
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Luigia Trabace
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Lucia Conti
- Center for Gender-Specific Medicine, Istituto Superiore di Sanità, Rome, Italy
| | - Elena Ortona
- Center for Gender-Specific Medicine, Istituto Superiore di Sanità, Rome, Italy
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Li KX, Feng Y, Fan XX, Sun X, Li Y, Wu D, Liu L, Cui CP, Xiong X, Li HD, Zhou M, Ma HL, Liu Y, Zhang R, Li BY. Bradykinin-mediated estrogen-dependent depressor response by direct activation of female-specific distribution of myelinated Ah-type baroreceptor neurons in rats. CNS Neurosci Ther 2021; 28:435-447. [PMID: 34964272 PMCID: PMC8841294 DOI: 10.1111/cns.13792] [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: 10/16/2021] [Revised: 12/06/2021] [Accepted: 12/14/2021] [Indexed: 12/03/2022] Open
Abstract
Aim To understand the direct impact of bradykinin in autonomic control of circulation through baroreflex afferent pathway. Methods The mean arterial pressure (MAP) was monitored while bradykinin and its agonists were applied via nodose (NG) microinjection, the expression of bradykinin receptors (BRs) in the NG (1st‐order) and nucleus tractus solitarius (NTS, 2nd‐order) were tested in adult male, age‐matched female, and ovariectomized rats under physiological and hypertensive conditions. Additionally, bradykinin‐induced depolarization was also tested in identified baroreceptor and baroreceptive neurons using whole‐cell patch‐clamp technique. Results Under physiological condition, bradykinin‐induced dose‐ and estrogen‐dependent reductions of MAP with lower estimated EC50 in females. B2R agonist mediated more dramatic MAP reduction with long‐lasting effect compared with B1R activation. These functional observations were consistent with the molecular and immunostaining evidences. However, under hypertensive condition, the MAP reduction was significantly less dramatic in N’‐Nitro‐L‐Arginine‐methyl ester (L‐NAME) induced secondary and spontaneous hypertension rats in males compared with female rats. Electrophysiological data showed that bradykinin‐elicited concentration‐dependent membrane depolarization with discharges during initial phase in identified myelinated Ah‐types baroreceptor neurons, not myelinated A‐types; while, higher concentration of bradykinin was required for depolarization of unmyelinated C‐types without initial discharges. Conclusion These datasets have demonstrated for the first time that bradykinin mediates direct activation of baroreflex afferent function to trigger estrogen‐dependent depressor response, which is due mainly to the direct activation/neuroexcitation of female‐specific myelinated Ah‐type baroreceptor neurons leading to a sexual dimorphism in parasympathetic domination of blood pressure regulation via activation of B2R/B1R expression in baroreflex afferent pathway.
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Affiliation(s)
- Ke-Xin Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yan Feng
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xiong-Xiong Fan
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xun Sun
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Ying Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Di Wu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Li Liu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Chang-Peng Cui
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xue Xiong
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Hu-Die Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Meng Zhou
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Hai-Lan Ma
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yang Liu
- Department of clinical Laboratory, The 1st Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Rong Zhang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
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Wang LQ, Qian Z, Ma HL, Zhou M, Li HD, Cui CP, Luo DL, Li XL, Li BY. Estrogen-dependent KCa1.1 modulation is essential for retaining neuroexcitation of female-specific subpopulation of myelinated Ah-type baroreceptor neurons in rats. Acta Pharmacol Sin 2021; 42:2173-2180. [PMID: 34267344 PMCID: PMC8632902 DOI: 10.1038/s41401-021-00722-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 06/20/2021] [Accepted: 06/21/2021] [Indexed: 12/13/2022] Open
Abstract
Female-specific subpopulation of myelinated Ah-type baroreceptor neurons (BRNs) in nodose ganglia is the neuroanatomical base of sexual-dimorphic autonomic control of blood pressure regulation, and KCa1.1 is a key player in modulating the neuroexcitation in nodose ganglia. In this study we investigated the exact mechanisms underlying KCa1.1-mediated neuroexcitation of myelinated Ah-type BRNs in the presence or absence of estrogen. BRNs were isolated from adult ovary intact (OVI) or ovariectomized (OVX) female rats, and identified electrophysiologically and fluorescently. Action potential (AP) and potassium currents were recorded using whole-cell recording. Consistently, myelinated Ah-type BRNs displayed a characteristic discharge pattern and significantly reduced excitability after OVX with narrowed AP duration and faster repolarization largely due to an upregulated iberiotoxin (IbTX)-sensitive component; the changes in AP waveform and repetitive discharge of Ah-types from OVX female rats were reversed by G1 (a selective agonist for estrogen membrane receptor GPR30, 100 nM) and/or IbTX (100 nM). In addition, the effect of G1 on repetitive discharge could be completely blocked by G15 (a selective antagonist for estrogen membrane receptor GPR30, 3 μM). These data suggest that estrogen deficiency by removing ovaries upregulates KCa1.1 channel protein in Ah-type BRNs, and subsequently increases AP repolarization and blunts neuroexcitation through estrogen membrane receptor signaling. Intriguingly, this upregulated KCa1.1 predicted electrophysiologically was confirmed by increased mean fluorescent intensity that was abolished by estrogen treatment. These electrophysiological findings combined with immunostaining and pharmacological manipulations reveal the crucial role of KCa1.1 in modulation of neuroexcitation especially in female-specific subpopulation of myelinated Ah-type BRNs and extend our current understanding of sexual dimorphism of neurocontrol of BP regulation.
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Affiliation(s)
- Lu-Qi Wang
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Zhao Qian
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China
- Department of Pharmacy, the First Affiliated Hospital of Harbin Medical University, Harbin, 150010, China
| | - Hai-Lan Ma
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Meng Zhou
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Hu-Die Li
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Chang-Peng Cui
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China
| | - Da-Li Luo
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Xue-Lian Li
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China.
| | - Bai-Yan Li
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, and Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, China.
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Estrogen-dependent MicroRNA-504 Expression and Related Baroreflex Afferent Neuroexcitation via Negative Regulation on KCNMB4 and KCa1.1 β4-subunit Expression. Neuroscience 2020; 442:168-182. [DOI: 10.1016/j.neuroscience.2020.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/01/2020] [Accepted: 07/01/2020] [Indexed: 11/21/2022]
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5
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Xu WX, Yu JL, Feng Y, Yan QX, Li XY, Li Y, Liu Z, Wang D, Sun X, Li KX, Wang LQ, Qiao GF, Li BY. Spontaneous activities in baroreflex afferent pathway contribute dominant role in parasympathetic neurocontrol of blood pressure regulation. CNS Neurosci Ther 2018; 24:1219-1230. [PMID: 30044043 DOI: 10.1111/cns.13039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 07/04/2018] [Accepted: 07/09/2018] [Indexed: 12/15/2022] Open
Abstract
AIM To study the dominant role of parasympathetic inputs at cellular level of baroreflex afferent pathway and underlying mechanism in neurocontrol of blood pressure regulation. METHODS Whole-cell patch-clamp and animal study were conducted. RESULTS For the first time, we demonstrated the spontaneous activities from resting membrane potential in myelinated A- and Ah-type baroreceptor neurons (BRNs, the 1st-order), but not in unmyelinated C-types, using vagus-nodose slice of adult female rats. These data were further supported by the notion that the spontaneous synaptic currents could only be seen in the pharmacologically and electrophysiologically defined myelinated A- and Ah-type baroreceptive neurons (the 2nd-order) of NTS using brainstem slice of adult female rats. The greater frequency and the larger amplitude of the spontaneous excitatory postsynaptic currents (EPSCs) compared with the inhibitory postsynaptic currents (IPSCs) were only observed in Ah-types. The ratio of EPSCs:IPSCs was estimated at 3:1 and higher. These results confirmed that the afferent-specific spontaneous activities were generated from baroreflex afferent pathway in female-specific subpopulation of myelinated Ah-type BRNs in nodose and baroreceptive neurons in NTS, which provided a novel insight into the dominant role of sex-specific baroreflex-evoked parasympathetic drives in retaining a stable and lower blood pressure status in healthy subjects, particularly in females. CONCLUSION The data from current investigations establish a new concept for the role of Ah-type baroreceptor/baroreceptive neurons in controlling blood pressure stability and provide a new pathway for pharmacological intervention for hypertension and cardiovascular diseases.
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Affiliation(s)
- Wen-Xiao Xu
- Department of Orthopedic Surgery, the 2nd Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jin-Ling Yu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Yan Feng
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Qiu-Xin Yan
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Xin-Yu Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Ying Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Zhuo Liu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China.,Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana
| | - Di Wang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China.,Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana
| | - Xun Sun
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Ke-Xin Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Lu-Qi Wang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China.,Department of Biomedical Engineering, Indiana University Purdue University Indianapolis School of Engineering and Technology, Indianapolis, Indiana
| | - Guo-Fen Qiao
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, China
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Popiolek‐Barczyk K, Łażewska D, Latacz G, Olejarz A, Makuch W, Stark H, Kieć‐Kononowicz K, Mika J. Antinociceptive effects of novel histamine H 3 and H 4 receptor antagonists and their influence on morphine analgesia of neuropathic pain in the mouse. Br J Pharmacol 2018; 175:2897-2910. [PMID: 29486058 PMCID: PMC6016676 DOI: 10.1111/bph.14185] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 01/26/2018] [Accepted: 01/31/2018] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE The histaminergic system is a promising target for the development of new analgesics, as histamine H3 and H4 receptors are expressed in regions concerned with nociceptive transmission. Here we have determined the analgesic effects of new H3 and H4 receptor antagonists in naive and neuropathic mice. EXPERIMENTAL APPROACH We used chronic constriction injury (CCI) to the sciatic nerve in mice to model neuropathy. Effects of a new H3 receptor antagonist, E-162(1-(5-(naphthalen-1-yloxy)pentyl)piperidine) and H4 receptor antagonist, TR-7(4-(4-chlorophenyl)-6-(4-methylpiperazin-1-yl)-1,3,5-triazin-2-amine) were assessed on mechanical (von Frey) and thermal (cold plate, tail flick) stimuli in mice with and without CCI (7 days after injury). Effects of these antagonists on morphine analgesia were also evaluated, along with the possible participation of H1 receptors in their effects. We analysed the compounds in binding and functional cAMP assays at the H3 and H4 receptors and determined metabolic stability. KEY RESULTS E-162 and TR-7 attenuated nociceptive responses and profound morphine analgesia in males with CCI. These antagonists showed analgesia in naive mice (tail flick test) and produced prolonged analgesia in neuropathic females. E-162-induced analgesia was reversed by pyrilamine, an H1 receptor antagonist. E-162 bound potently to H3 receptors (Ki = 55 nM) and inhibited cAMP accumulation (IC50 = 165 nM). TR-7 showed lower affinity for H4 receptors (Ki = 203 nM) and IC50 of 512 nM. CONCLUSIONS AND IMPLICATIONS We describe a therapeutic use for new H3 (E-162) and H4 receptor (TR-7) antagonists in neuropathy. Targeting H3 and H4 receptors enhanced morphine analgesia, consistent with multimodal pain therapy.
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Affiliation(s)
- Katarzyna Popiolek‐Barczyk
- Department of Technology and Biotechnology of DrugsJagiellonian University Medical CollegeKrakowPoland
- Department of Pain Pharmacology, Institute of PharmacologyPolish Academy of SciencesKrakowPoland
| | - Dorota Łażewska
- Department of Technology and Biotechnology of DrugsJagiellonian University Medical CollegeKrakowPoland
| | - Gniewomir Latacz
- Department of Technology and Biotechnology of DrugsJagiellonian University Medical CollegeKrakowPoland
| | - Agnieszka Olejarz
- Department of Technology and Biotechnology of DrugsJagiellonian University Medical CollegeKrakowPoland
| | - Wioletta Makuch
- Department of Pain Pharmacology, Institute of PharmacologyPolish Academy of SciencesKrakowPoland
| | - Holger Stark
- Institute of Pharmaceutical and Medicinal ChemistryHeinrich Heine University DüsseldorfDüsseldorfGermany
| | - Katarzyna Kieć‐Kononowicz
- Department of Technology and Biotechnology of DrugsJagiellonian University Medical CollegeKrakowPoland
| | - Joanna Mika
- Department of Pain Pharmacology, Institute of PharmacologyPolish Academy of SciencesKrakowPoland
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7
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Liu Y, Wu D, Qu MY, He JL, Yuan M, Zhao M, Wang JX, He J, Wang LQ, Guo XJ, Zuo M, Zhao SY, Ma MN, Li JN, Shou W, Qiao GF, Li BY. Neuropeptide Y-mediated sex- and afferent-specific neurotransmissions contribute to sexual dimorphism of baroreflex afferent function. Oncotarget 2018; 7:66135-66148. [PMID: 27623075 PMCID: PMC5323221 DOI: 10.18632/oncotarget.11880] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 07/16/2016] [Indexed: 01/19/2023] Open
Abstract
Background Molecular and cellular mechanisms of neuropeptide-Y (NPY)-mediated gender-difference in blood pressure (BP) regulation are largely unknown. Methods Baroreceptor sensitivity (BRS) was evaluated by measuring the response of BP to phenylephrine/nitroprusside. Serum NPY concentration was determined using ELISA. The mRNA and protein expression of NPY receptors were assessed in tissue and single-cell by RT-PCR, immunoblot, and immunohistochemistry. NPY was injected into the nodose while arterial pressure was monitored. Electrophysiological recordings were performed on nodose neurons from rats by patch-clamp technique. Results The BRS was higher in female than male and ovariectomized rats, while serum NPY concentration was similar among groups. The sex-difference was detected in Y1R, not Y2R protein expression, however, both were upregulated upon ovariectomy and canceled by estrogen replacement. Immunostaining confirmed Y1R and Y2R expression in myelinated and unmyelinated afferents. Single-cell PCR demonstrated that Y1R expression/distribution was identical between A- and C-types, whereas, expressed level of Y2R was ∼15 and ∼7 folds higher in Ah- and C-types than A-types despite similar distribution. Activation of Y1R in nodose elevated BP, while activation of Y2R did the opposite. Activation of Y1R did not alter action potential duration (APD) of A-types, but activation of Y2R- and Y1R/Y2R in Ah- and C-types frequency-dependently prolonged APD. N-type ICa was reduced in A-, Ah- and C-types when either Y1R, Y2R, or both were activated. The sex-difference in Y1R expression was also observed in NTS. Conclusions Sex- and afferent-specific expression of Neuropeptide-Y receptors in baroreflex afferent pathway may contribute to sexual-dimorphic neurocontrol of BP regulation.
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Affiliation(s)
- Yang Liu
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Di Wu
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Mei-Yu Qu
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jian-Li He
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Mei Yuan
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Miao Zhao
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jian-Xin Wang
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jian He
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Lu-Qi Wang
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Xin-Jing Guo
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Meng Zuo
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Shu-Yang Zhao
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Mei-Na Ma
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jun-Nan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Weinian Shou
- Riley Heart Research Center, Division of Pediatric Cardiology, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Guo-Fen Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China.,Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
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8
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Wang LQ, Liu SZ, Wen X, Wu D, Yin L, Fan Y, Wang Y, Chen WR, Chen P, Liu Y, Lu XL, Sun HL, Shou W, Qiao GF, Li BY. Ketamine-mediated afferent-specific presynaptic transmission blocks in low-threshold and sex-specific subpopulation of myelinated Ah-type baroreceptor neurons of rats. Oncotarget 2016; 6:44108-22. [PMID: 26675761 PMCID: PMC4792545 DOI: 10.18632/oncotarget.6586] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 11/29/2015] [Indexed: 01/19/2023] Open
Abstract
Background Ketamine enhances autonomic activity, and unmyelinated C-type baroreceptor afferents are more susceptible to be blocked by ketamine than myelinated A-types. However, the presynaptic transmission block in low-threshold and sex-specific myelinated Ah-type baroreceptor neurons (BRNs) is not elucidated. Methods Action potentials (APs) and excitatory post-synaptic currents (EPSCs) were investigated in BRNs/barosensitive neurons identified by conduction velocity (CV), capsaicin-conjugated with Iberiotoxin-sensitivity and fluorescent dye using intact nodose slice and brainstem slice in adult female rats. The expression of mRNA and targeted protein for NMDAR1 was also evaluated. Results Ketamine time-dependently blocked afferent CV in Ah-types in nodose slice with significant changes in AP discharge. The concentration-dependent inhibition of ketamine on AP discharge profiles were also assessed and observed using isolated Ah-type BRNs with dramatic reduction in neuroexcitability. In brainstem slice, the 2nd-order capsaicin-resistant EPSCs were identified and ∼50% of them were blocked by ketamine concentration-dependently with IC50 estimated at 84.4 μM compared with the rest (708.2 μM). Interestingly, the peak, decay time constant, and area under curve of EPSCs were significantly enhanced by 100 nM iberiotoxin in ketamine-more sensitive myelinated NTS neurons (most likely Ah-types), rather than ketamine-less sensitive ones (A-types). Conclusions These data have demonstrated, for the first time, that low-threshold and sex-specific myelinated Ah-type BRNs in nodose and Ah-type barosensitive neurons in NTS are more susceptible to ketamine and may play crucial roles in not only mean blood pressure regulation but also buffering dynamic changes in pressure, as well as the ketamine-mediated cardiovascular dysfunction through sexual-dimorphic baroreflex afferent pathway.
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Affiliation(s)
- Lu-Qi Wang
- Department of Pharmacology, Harbin Medical University, Harbin, China.,Key Laboratory of Cardiovascular Medicine Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Sheng-Zhi Liu
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xin Wen
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Di Wu
- Key Laboratory of Cardiovascular Medicine Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Lei Yin
- Key Laboratory of Cardiovascular Medicine Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Yao Fan
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Ye Wang
- Department of Pharmacology, Daqing Campus of Harbin Medical University, Daqing, China
| | - Wei-Ran Chen
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Pei Chen
- Key Laboratory of Cardiovascular Medicine Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Yang Liu
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xiao-Long Lu
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Hong-Li Sun
- Department of Pharmacology, Daqing Campus of Harbin Medical University, Daqing, China
| | - Weinian Shou
- Riley Heart Research Center, Division of Pediatric Cardiology, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Guo-Fen Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China.,Key Laboratory of Cardiovascular Medicine Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
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Liu Y, Zhou JY, Zhou YH, Wu D, He JL, Han LM, Liang XB, Wang LQ, Lu XL, Chen H, Qiao GF, Shou W, Li BY. Unique Expression of Angiotensin Type-2 Receptor in Sex-Specific Distribution of Myelinated Ah-Type Baroreceptor Neuron Contributing to Sex-Dimorphic Neurocontrol of Circulation. Hypertension 2016; 67:783-91. [DOI: 10.1161/hypertensionaha.115.06815] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 01/26/2016] [Indexed: 11/16/2022]
Affiliation(s)
- Yang Liu
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Jia-Ying Zhou
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Yu-Hong Zhou
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Di Wu
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Jian-Li He
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Li-Min Han
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Xiao-Bo Liang
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Lu-Qi Wang
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Xiao-Long Lu
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Hanying Chen
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Guo-Fen Qiao
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Weinian Shou
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
| | - Bai-Yan Li
- From the Department of Pharmacology (Y.L., J.-Y.Z., Y.-H.Z., D.W., J.-L.H., L.-M.H., X.-B.L., L.-Q.W., X.-L.L., G.-F.Q., B.-Y.L.) and Key Laboratory of Cardiovascular Medicine Research of Ministry of Education (Y.-H.Z., D.W., L.-Q.W., X,-B.L., G.-F.Q.), Harbin Medical University, Harbin, Heilongjiang, China; Riley Heart Research Center, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis (H.C., W.S.)
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Zhang YY, Yan ZY, Qu MY, Guo XJ, Li G, Lu XL, Liu Y, Ban T, Sun HL, Qiao GF, Li BY. KCa1.1 is potential marker for distinguishing Ah-type baroreceptor neurons in NTS and contributes to sex-specific presynaptic neurotransmission in baroreflex afferent pathway. Neurosci Lett 2015. [DOI: 10.1016/j.neulet.2015.07.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Li JN, Li XL, He J, Wang JX, Zhao M, Liang XB, Zhao SY, Ma MN, Liu Y, Wang YB, Chen H, Qiao GF, Li BY. Sex- and afferent-specific differences in histamine receptor expression in vagal afferents of rats: A potential mechanism for sexual dimorphism in prevalence and severity of asthma. Neuroscience 2015; 303:166-77. [PMID: 26141840 DOI: 10.1016/j.neuroscience.2015.06.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 06/22/2015] [Accepted: 06/23/2015] [Indexed: 10/23/2022]
Abstract
The incidence of asthma is more common in boys than in girls during the childhood, and more common in premenopausal female than age-matched males. Our previous study demonstrated a gender difference in histamine-mediated neuroexcitability in nodose ganglia neurons (NGNs), highlighting a possibility of histamine-mediated gender difference in asthma via visceral afferent function. In the present study, we aimed to explore the gender difference in expression profiles of histamine receptors (HRs) in nodose ganglia (NG) and individual identified NGNs to provide deeper insights into the mechanisms involved in sexual dimorphism of asthma. Western-blot and SYBR green RT-PCR showed that H2R and H3R were highly expressed in NG of females compared with males and downregulated in ovariectomized females. H1R was equally expressed in NG of both sexes and not altered by ovariectomy. Furthermore, this highly expressive H2R and H3R were distributed in both myelinated and unmyelinated NGNs isolated from adult female rats by immunofluorescence and single-cell RT-PCR. H3R widely distributed in all tested neuron subtypes and its expression did not show significant difference among neuron subtypes. H2R was widely and highly expressed in low-threshold and sex-specific subpopulation of myelinated Ah-types compared with myelinated A- and unmyelinated C-type NGNs. Unexpectedly, weak expression of H1R was detected in both myelinated and unmyelinated NGNs by immunofluorescence, which was further confirmed by single-cell RT-PCR. Our results suggest that the sexual dimorphism in the expression of H2R and H3R in vagal afferents very likely contributes, at least partially, to the gender difference in prevalence and severity of asthma.
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Affiliation(s)
- J N Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - X L Li
- Department of Pharmacology, Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - J He
- Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - J X Wang
- Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - M Zhao
- Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - X B Liang
- Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - S Y Zhao
- Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - M N Ma
- Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Y Liu
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Y B Wang
- Department of Cerebral Surgery, Harbin Municipal First Hospital, Harbin, China
| | - H Chen
- Riley Heart Research Center, Division of Pediatric Cardiology, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, USA
| | - G F Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, Harbin Medical University, Harbin, China.
| | - B Y Li
- Department of Pharmacology, Harbin Medical University, Harbin, China.
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Variations in afferent conduction and axonal morphometrics of aortic depressive nerve imply wider baroreflex function of low-threshold and sex-specific myelinated Ah-type baroreceptor neurons in rats. Int J Cardiol 2015; 182:23-6. [DOI: 10.1016/j.ijcard.2014.12.113] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Accepted: 12/27/2014] [Indexed: 11/19/2022]
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Yan ZY, He JL, Wen X, Zuo M, Guo XJ, Guo TZ, Schild JH, Qiao GF, Li BY. Retracted: Significant variations in afferent conduction and axonal morphology of aortic depressive nerve imply broader spectrum of baroreflex function of myelinated Ah-type baroreceptor neurons in female rats. Int J Cardiol 2014; 176:1280-3. [PMID: 25127981 DOI: 10.1016/j.ijcard.2014.07.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 07/27/2014] [Indexed: 11/15/2022]
Affiliation(s)
- Zhen-Yu Yan
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Jian-Li He
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xin Wen
- Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Meng Zuo
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xin-Jing Guo
- Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Tian-Zhu Guo
- Department of Immunology, Capital Medical University School of Basic Medical Science, 10 Xitoutiao, Youanmen, Fengtai District, Beijing 10069, China
| | - John H Schild
- Department of Biomedical Engineering, School of Technology and Engineering, IN University Purdue University Indianapolis, Indianapolis, USA
| | - Guo-Fen Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China.
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Liu H, Xin T, He W, Li F, Su ZQ. Myelinated Ah-type trigeminal ganglion neurons in female rats: neuroexcitability, chemosensitivity to histamine, and potential clinical impact. Neurosci Lett 2014; 567:74-9. [PMID: 24686179 DOI: 10.1016/j.neulet.2014.03.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 02/19/2014] [Accepted: 03/07/2014] [Indexed: 12/14/2022]
Abstract
Migraine is a chronic neurological disorder characterized by recurrent moderate-to-severe headaches often associated with numerous autonomic nervous system symptoms, and it is more prevalent in women. To fully understand the underlying mechanism, standard electrophysiology was performed with trigeminal ganglion neurons (TGNs) isolated from adult rats of both genders using the whole-cell patch clamp technique to test the distribution, neuroexcitability, and chemosensitivity to histamine. In addition to traditionally classified A- and C-type TGNs, myelinated Ah-type TGNs were also observed in females. The electrophysiological features showed low firing threshold and the capability to fire repetitively upon stimulation. Ah-type neurons also functionally expressed persistent TTX-R Na(+) channels with more hyperpolarized activating voltage. Iberiotoxin and NS11021 significantly altered the discharge profiles of Ah-type TGNs. Finally, Ah-type TGNs showed a more potent reaction to histamine, with relatively larger inward currents and membrane depolarization compared with C-types. These data provide evidence of the gender-specific distribution of myelinated Ah-type TGNs in adult female rats, characterized by a low threshold and high frequency of firing that are at least partially attributable to persistent TTX-R Na(+) and BK-KCa channel expression and potent chemosensitivity to histamine, suggesting that Ah-type TGNs may play a key role in gender differences in migraine.
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Affiliation(s)
- Hua Liu
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, China; Department of Neurology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Ting Xin
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wei He
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Fang Li
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Zhi-Qiang Su
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, China.
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