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Nagao R, Mizutani Y, Shima S, Ueda A, Ito M, Yoshimoto J, Watanabe H. Correlations between serotonin impairments and clinical indices in multiple system atrophy. Eur J Neurol 2024; 31:e16158. [PMID: 38085271 DOI: 10.1111/ene.16158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 10/30/2023] [Accepted: 11/02/2023] [Indexed: 02/09/2024]
Abstract
BACKGROUND AND PURPOSE Multiple system atrophy (MSA) is a neurodegenerative disease with characteristic motor and autonomic symptoms. Impaired brain serotonergic innervation can be associated with various clinical indices of MSA; however, the relationship between clinical symptoms and cerebrospinal fluid (CSF) levels of 5-hydroxyindole acetic acid (5-HIAA), a main serotonin metabolite, has not been fully elucidated. METHODS To compare CSF 5-HIAA levels between patients with MSA and healthy controls, we included 33 controls and 69 MSA patients with either predominant parkinsonian or cerebellar ataxia subtypes. CSF 5-HIAA levels were measured using high-performance liquid chromatography. Additionally, we investigated correlations between CSF 5-HIAA and various clinical indices in 34 MSA patients. RESULTS CSF 5-HIAA levels were significantly lower in MSA patients than in controls (p < 0.0001). Probable MSA patients had lower CSF 5-HIAA levels than possible MSA patients (p < 0.001). In MSA patients, CSF 5-HIAA levels were inversely correlated with scores in Parts 1, 2, and 4 of the Unified Multiple System Atrophy Rating Scale, and with systolic and diastolic blood pressure in Part 3. Structural equation modeling revealed significant paths between serotonin and clinical symptoms, and significance was highest for activities of daily living, walking, and body sway. CONCLUSIONS Serotonin dysfunction, as assessed by CSF 5-HIAA levels, may implicate greater MSA severity.
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Affiliation(s)
- Ryunosuke Nagao
- Department of Neurology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Yasuaki Mizutani
- Department of Neurology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Sayuri Shima
- Department of Neurology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Akihiro Ueda
- Department of Neurology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Mizuki Ito
- Department of Neurology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
| | - Junichiro Yoshimoto
- Department of Biomedical Data Science, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
- International Center for Brain Science, Fujita Health University, Toyoake, Aichi, Japan
| | - Hirohisa Watanabe
- Department of Neurology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
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Lavery TC, Spiegelhoff A, Wang K, Kennedy CL, Ridlon M, Keil Stietz KP. Polychlorinated biphenyl (PCB) exposure in adult female mice can influence bladder contractility. AMERICAN JOURNAL OF CLINICAL AND EXPERIMENTAL UROLOGY 2023; 11:367-384. [PMID: 37941647 PMCID: PMC10628623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 07/21/2023] [Indexed: 11/10/2023]
Abstract
Lower urinary tract symptoms (LUTS) greatly reduce quality of life. While LUTS etiology is not completely understood, it is plausible that environmental contaminants could play a role. Polychlorinated biphenyls (PCBs), are a group of persistent environmental toxicants frequently documented in animal and human tissues. PCBs are capable of influencing voiding function in mouse offspring exposed developmentally, however whether PCB exposure during adulthood can also influence voiding dynamics is unknown. Therefore, the purpose of this study was to determine whether PCB exposure in adult female mice can impact voiding function. As part of a larger study to generate developmentally exposed offspring, adult female C57Bl/6J mice were dosed orally with the MARBLES PCB mixture (0.1, 1, or 6 mg/kg/day) or vehicle control beginning two weeks before mating and throughout gestation and lactation (9 weeks). Adult dosed female dams then underwent void spot assay, uroflowmetry, and anesthetized cystometry to assess voiding function. Bladder contractility was assessed in ex vivo bladder bath assays, and bladders were collected for morphology and histology assessments. While voiding behavior endpoints were minimally impacted, alterations to bladder contractility dynamics were more pronounced. Adult female mice dosed with 1 mg/kg/d PCB showed an increase in urine spots 2-3 cm2 in size, increased bladder contractility in response to electrical field stimulation, and decreased bladder wall thickness compared to vehicle control. PCBs also altered contractile response to cholinergic agonist in a dose-dependent manner. Overall, these results indicate that exposure to PCBs in adult female mice is sufficient to produce changes in bladder physiology. These results also highlight the critical role of timing of exposure in influencing voiding function.
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Affiliation(s)
- Thomas Cm Lavery
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison Madison, Wisconsin 53706, USA
| | - Audrey Spiegelhoff
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison Madison, Wisconsin 53706, USA
| | - Kathy Wang
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison Madison, Wisconsin 53706, USA
| | - Conner L Kennedy
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison Madison, Wisconsin 53706, USA
| | - Monica Ridlon
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison Madison, Wisconsin 53706, USA
| | - Kimberly P Keil Stietz
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison Madison, Wisconsin 53706, USA
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Sattayachiti S, Waemong A, Cheaha D, Konthapakdee N. 5-HT3 receptors modulate changes in voiding pattern and bladder contractility in water avoidance stress-induced bladder overactivity in male mice. Auton Neurosci 2022; 243:103040. [DOI: 10.1016/j.autneu.2022.103040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 08/31/2022] [Accepted: 09/27/2022] [Indexed: 11/05/2022]
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Activation of 5-HT3 receptors in the medulla oblongata is involved in the phasic control of urinary bladder. Neurosci Lett 2022; 790:136886. [PMID: 36179901 DOI: 10.1016/j.neulet.2022.136886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/13/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022]
Abstract
The control of micturition depends on reflex mechanisms, however, it undergoes modulation from cortex, pons and medullary areas. This study investigated if the activation of 5-HT3 receptors in the medulla influences the urinary bladder (UB) regulation in rats. Isoflurane female Wistar rats were submitted to catheterization of the femoral artery and vein for mean arterial pressure (MAP) and heart rate (HR) recordings and injection of drugs, respectively. The UB was cannulated for intravesical pressure (IP) measurement. The Doppler flow probe was placed around the left renal artery for renal conductance (RC) recordings. Phenylbiguanide (PB) and granisetron (GN) were injected into the 4th brain ventricle in rats with guide cannulas implanted 5 days prior to the experiments; or PB and GN were randomly injected intravenously or applied topically (in situ) on the UB. PB injection into 4th V significantly increased IP (68.67 ± 11.70%) and decreased MAP (-29 ± 6 mmHg) compared to saline (0.34 ± 0.64% and -2 ± 2 mmHg), with no changes in the HR and RC. GN injection into the 4th V did not significantly change the IP and RC compared to saline, nevertheless, significantly increased MAP (25 ± 4 mmHg) and heart rate (36 ± 9 bpm) compared to saline. Intravenous PB and GN only produced cardiovascular effects, whilst PB but not GN in situ on the UB evoked increase in IP (111.60 ± 30.36%). Therefore, the activation of 5HT-3 receptors in medullary areas increases the intravesical pressure and these receptors are involved in the phasic control of UB. In contrast, 5-HT3 receptors in the medulla oblongata are involved in the pathways of the tonic control of the cardiovascular system. The activation of 5-HT3 receptors in the bladder cause increase in intravesical pressure and this regulation seem to be under phasic control as the blockade of such receptors elicits no changes in baseline intravesical pressure.
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Sexual dimorphic impacts of systemic vincristine on lower urinary tract function. Sci Rep 2022; 12:5113. [PMID: 35332157 PMCID: PMC8948262 DOI: 10.1038/s41598-022-08585-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 03/09/2022] [Indexed: 11/20/2022] Open
Abstract
Vincristine (VCR) is one of the most common chemotherapy agents used in pediatric oncology. Despite the well-known VCR-induced peripheral neuropathy, potential impacts of VCR on lower urinary tract (LUT) function remain poorly defined. We investigated the effects of systemic VCR exposure in childhood on LUT function by using juvenile mice treated with VCR (4 mg/kg) or saline and evaluated at 5 weeks later. VCR induced a decreased urinary frequency with increased functional bladder capacity and non-void contractions. There were no changes in detrusor contractility between the groups. VCR exposure caused sexual dimorphic changes; in females, increased intravesical pressure at micturition and downregulations of a major player in bladder afferent firing, Htr3b, in the bladders, and Cav1.2 in the lumbosacral dorsal root ganglia (Ls-DRG), while male mice displayed increases in bladder compliance and detrusor activity, upregulations of IL-2, Trpa1 and Itga1 in the bladders and neuroinflammation-related genes, P2×4, P2×7, IL-2 and CD68 in the Ls-DRG. These results suggest that that systemic VCR exposure caused sensory neuropathy via sex-dimorphic mechanisms, leading to altered LUT function. These changes might clinically present as gender-specific signs or symptoms of LUT dysfunction, and follow-up urological assessment may be of benefit for pediatric cancer patients treated with VCR.
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Chen J, Li Q, Saliuk G, Bazhanov S, Winston JH. Estrogen and serotonin enhance stress-induced visceral hypersensitivity in female rats by up-regulating brain-derived neurotrophic factor in spinal cord. Neurogastroenterol Motil 2021; 33:e14117. [PMID: 33705592 DOI: 10.1111/nmo.14117] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 02/08/2021] [Accepted: 02/15/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND We previously reported that female offspring of dams subjected to chronic prenatal stress (CPS) develop enhanced visceral hypersensitivity (VHS) following exposure to chronic stress in adult life that is mediated by up-regulation of spinal cord BDNF. The aims of this study were to examine the roles of estrogen receptor alpha (ERα) and an increase in spinal serotonin signaling in promoting this enhanced VHS in female rats and up-regulation of spinal cord BDNF transcription. METHODS Pregnant dams were exposed to chronic stress from E11 until delivery. At 8 weeks, a chronic adult stress (CAS) protocol was applied for nine days. KEY RESULTS Ovariectomy before CAS or treatment with letrozole before and during CAS significantly prevented the development of enhanced VHS in female CPS+CAS rats. Intrathecal application of ERα siRNA significantly reduced VHS, decreased lumbar-sacral spinal cord expression of both ERα and BDNF, and reversed pro-transcriptional epigenetic modifications at BDNF promoter lX. Cerebrospinal fluid serotonin levels and 5HT3A receptor expression in the LS spinal cord were both significantly increased in female CPS+CAS rats. During CAS, intrathecal infusion of alosetron significantly decreased VHS, reduced BDNF and ERα expression in the LS spinal cord, and attenuated RNA pol II and ERα binding to the BNDF core promoter IX. CONCLUSIONS & INFERENCES Serotonin-mediated activation of 5HT3A receptors in the spinal cord drives the development of enhanced female-specific VHS in our two hit CPS+CAS through up-regulation of spinal cord ERα.
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Affiliation(s)
- Jinghong Chen
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China
| | - Qingjie Li
- Division of Gastroenterology and Hepatology, Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Genevieve Saliuk
- Division of Gastroenterology and Hepatology, Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Sonia Bazhanov
- Division of Gastroenterology and Hepatology, Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - John H Winston
- Division of Gastroenterology and Hepatology, Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
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Iguchi N, Carrasco A, Xie AX, Pineda RH, Malykhina AP, Wilcox DT. Functional constipation induces bladder overactivity associated with upregulations of Htr2 and Trpv2 pathways. Sci Rep 2021; 11:1149. [PMID: 33441874 PMCID: PMC7806916 DOI: 10.1038/s41598-020-80794-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 12/23/2020] [Indexed: 01/23/2023] Open
Abstract
Bladder and bowel dysfunction (BBD) is a common yet underdiagnosed paediatric entity that describes lower urinary tract symptoms (LUTS) accompanied by abnormal bowel patterns manifested as constipation and/or encopresis. LUTS usually manifest as urgency, urinary frequency, incontinence, and urinary tract infections (UTI). Despite increasing recognition of BBD as a risk factor for long-term urinary tract problems including recurrent UTI, vesicoureteral reflux, and renal scarring, the mechanisms underlying BBD have been unclear, and treatment remains empirical. We investigated how constipation affects the lower urinary tract function using a juvenile murine model of functional constipation. Following four days of functional constipation, animals developed LUTS including urinary frequency and detrusor overactivity evaluated by awake cystometry. Physiological examination of detrusor function in vitro using isolated bladder strips, demonstrated a significant increase in spontaneous contractions without affecting contractile force in response to electrical field stimulation, carbachol, and KCl. A significant upregulation of serotonin receptors, Htr2a and Htr2c, was observed in the bladders from mice with constipation, paralleled with augmented spontaneous contractions after pre-incubation of the bladder strips with 0.5 µM of serotonin. These results suggest that constipation induced detrusor overactivity and increased excitatory serotonin receptor activation in the urinary bladder, which contributes to the development of BBD.
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Affiliation(s)
- Nao Iguchi
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, 12700 E 19th Avenue, Aurora, CO, 80045, USA
| | - Alonso Carrasco
- Children's Hospital Colorado, 13123 E 16th Avenue, B463, Aurora, CO, 80045, USA
- Children's Mercy Kansas City, 2401 Gillham Rd, Kansas City, MO, 64108, USA
| | - Alison X Xie
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, 12700 E 19th Avenue, Aurora, CO, 80045, USA
| | - Ricardo H Pineda
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, 12700 E 19th Avenue, Aurora, CO, 80045, USA
| | - Anna P Malykhina
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, 12700 E 19th Avenue, Aurora, CO, 80045, USA
| | - Duncan T Wilcox
- Division of Urology, Department of Surgery, University of Colorado Denver School of Medicine, 12700 E 19th Avenue, Aurora, CO, 80045, USA.
- Children's Hospital Colorado, 13123 E 16th Avenue, B463, Aurora, CO, 80045, USA.
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8
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The Role of Descending Pain Modulation in Chronic Primary Pain: Potential Application of Drugs Targeting Serotonergic System. Neural Plast 2019; 2019:1389296. [PMID: 31933624 PMCID: PMC6942873 DOI: 10.1155/2019/1389296] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 11/02/2019] [Accepted: 11/27/2019] [Indexed: 11/24/2022] Open
Abstract
Chronic primary pain (CPP) is a group of diseases with long-term pain and functional disorders but without structural or specific tissue pathologies. CPP is becoming a serious health problem in clinical practice due to the unknown cause of intractable pain and high cost of health care yet has not been satisfactorily addressed. During the past decades, a significant role for the descending pain modulation and alterations due to specific diseases of CPP has been emphasized. It has been widely established that central sensitization and alterations in neuroplasticity induced by the enhancement of descending pain facilitation and/or the impairment of descending pain inhibition can explain many chronic pain states including CPP. The descending serotonergic neurons in the raphe nuclei target receptors along the descending pain circuits and exert either pro- or antinociceptive effects in different pain conditions. In this review, we summarize the possible underlying descending pain regulation mechanisms in CPP and the role of serotonin, thus providing evidence for potential application of analgesic medications based on the serotonergic system in CPP patients.
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Mota CMD. A new role for serotonin: the 5-HT 3 receptor in bladder afferent hypersensitivity. J Physiol 2019; 598:23-24. [PMID: 31715639 DOI: 10.1113/jp279094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- Clarissa M D Mota
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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10
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van Thiel IAM, Botschuijver S, de Jonge WJ, Seppen J. Painful interactions: Microbial compounds and visceral pain. Biochim Biophys Acta Mol Basis Dis 2019; 1866:165534. [PMID: 31634534 DOI: 10.1016/j.bbadis.2019.165534] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 08/12/2019] [Accepted: 08/13/2019] [Indexed: 12/18/2022]
Abstract
Visceral pain, characterized by abdominal discomfort, originates from organs in the abdominal cavity and is a characteristic symptom in patients suffering from irritable bowel syndrome, vulvodynia or interstitial cystitis. Most organs in which visceral pain originates are in contact with the external milieu and continuously exposed to microbes. In order to maintain homeostasis and prevent infections, the immune- and nervous system in these organs cooperate to sense and eliminate (harmful) microbes. Recognition of microbial components or products by receptors expressed on cells from the immune and nervous system can activate immune responses but may also cause pain. We review the microbial compounds and their receptors that could be involved in visceral pain development.
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Affiliation(s)
- I A M van Thiel
- Tytgat Institute for Liver and Intestinal Research, Amsterdam UMC, location AMC, Meibergdreef 69, 1105 BK Amsterdam, the Netherlands
| | - S Botschuijver
- Tytgat Institute for Liver and Intestinal Research, Amsterdam UMC, location AMC, Meibergdreef 69, 1105 BK Amsterdam, the Netherlands
| | - W J de Jonge
- Tytgat Institute for Liver and Intestinal Research, Amsterdam UMC, location AMC, Meibergdreef 69, 1105 BK Amsterdam, the Netherlands
| | - J Seppen
- Tytgat Institute for Liver and Intestinal Research, Amsterdam UMC, location AMC, Meibergdreef 69, 1105 BK Amsterdam, the Netherlands.
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Konthapakdee N, Grundy L, O'Donnell T, Garcia‐Caraballo S, Brierley SM, Grundy D, Daly DM. Serotonin exerts a direct modulatory role on bladder afferent firing in mice. J Physiol 2019; 597:5247-5264. [DOI: 10.1113/jp278751] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 09/03/2019] [Indexed: 12/30/2022] Open
Affiliation(s)
- N. Konthapakdee
- Department of PhysiologyFaculty of SciencePrince of Songkla University Hat Yai Songkhla 90112 Thailand
| | - L. Grundy
- Visceral Pain Research GroupCentre for NeuroscienceCollege of Medicine and Public HealthFlinders University Bedford Park South Australia 5042 Australia
- Hopwood Centre for NeurobiologyLifelong Health ThemeSouth Australian Health and Medical Research Institute (SAHMRI) North Terrace Adelaide South Australia 5000 Australia
- Centre for Nutrition and Gastrointestinal DiseasesDiscipline of MedicineUniversity of Adelaide North Terrace Adelaide South Australia 5000 Australia
| | - T. O'Donnell
- Visceral Pain Research GroupCentre for NeuroscienceCollege of Medicine and Public HealthFlinders University Bedford Park South Australia 5042 Australia
- Hopwood Centre for NeurobiologyLifelong Health ThemeSouth Australian Health and Medical Research Institute (SAHMRI) North Terrace Adelaide South Australia 5000 Australia
- Centre for Nutrition and Gastrointestinal DiseasesDiscipline of MedicineUniversity of Adelaide North Terrace Adelaide South Australia 5000 Australia
| | - S. Garcia‐Caraballo
- Visceral Pain Research GroupCentre for NeuroscienceCollege of Medicine and Public HealthFlinders University Bedford Park South Australia 5042 Australia
- Hopwood Centre for NeurobiologyLifelong Health ThemeSouth Australian Health and Medical Research Institute (SAHMRI) North Terrace Adelaide South Australia 5000 Australia
- Centre for Nutrition and Gastrointestinal DiseasesDiscipline of MedicineUniversity of Adelaide North Terrace Adelaide South Australia 5000 Australia
| | - S. M. Brierley
- Visceral Pain Research GroupCentre for NeuroscienceCollege of Medicine and Public HealthFlinders University Bedford Park South Australia 5042 Australia
- Hopwood Centre for NeurobiologyLifelong Health ThemeSouth Australian Health and Medical Research Institute (SAHMRI) North Terrace Adelaide South Australia 5000 Australia
- Centre for Nutrition and Gastrointestinal DiseasesDiscipline of MedicineUniversity of Adelaide North Terrace Adelaide South Australia 5000 Australia
| | - D. Grundy
- Department of Biomedical ScienceUniversity of Sheffield Sheffield UK
| | - D. M. Daly
- University of Central Lancashire Preston UK
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El-Ayache N, Galligan JJ. 5-HT 3 receptor signaling in serotonin transporter-knockout rats: a female sex-specific animal model of visceral hypersensitivity. Am J Physiol Gastrointest Liver Physiol 2019; 316:G132-G143. [PMID: 30359082 PMCID: PMC6383387 DOI: 10.1152/ajpgi.00131.2018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The irritable bowel syndrome (IBS) is a functional gastrointestinal motor and visceral sensation disorder that is more common in women than men. Female serotonin transporter (SERT)-gene knockout (KO) rats exhibit hypersensitivity to colorectal balloon distention (CRD) that mimics colonic hypersensitivity occurring in female IBS patients. Alosetron (5-HT3 receptor antagonist) is used to treat diarrhea-predominant IBS in female patients. Other 5-HT3 receptor antagonists are ineffective at treating IBS symptoms. The visceromotor response (VMR) to CRD in SERT-KO and wild-type (WT) rats was measured following subcutaneous (sc), intracerobroventricular (icv), or intrathecal (it) treatment with 5-HT3 receptor antagonists and an agonist. Alosetron (sc) and granisetron (antagonists) caused a paradoxical increase in the VMR to CRD in SERT-KO female rats. Alosetron (sc) increased the VMR to CRD in WT male rats. Alosetron (it) increased the VMR to CRD in SERT-KO female rats only, and the 5-HT3 receptor agonist SR-52772 increased the VMR to CRD in SERT-KO male rats. Depletion of spinal 5-HT using 5,7-dihydroxytryptamine prevented the increase in VMR to CRD in SERT-KO female and male rats treated it with alosetron and SR-52772, respectively. Alosetron (icv) did not affect the VMR to CRD in WT or KO female rats, but it increased the VMR in male SERT-KO but not WT male rats. These data suggest that 5-HT3 receptor signaling at the dorsal spinal cord mediates visceral hypersensitivity in female SERT-KO rats. Such differences could facilitate development of sex-specific drug treatments for visceral pain. NEW & NOTEWORTHY We studied a model of female sex-specific visceral hypersensitivity using rats that had a loss of function of the serotonin transporter (SERT) caused by gene truncation. Female SERT-KO rats exhibited visceral hypersensitivity in response to colorectal balloon distention. We found that increased 5-HT signaling at dorsal spine 5-HT3 receptors was responsible for visceral hypersensitivity in female but not male SERT-KO rats.
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Affiliation(s)
- Nadine El-Ayache
- 1Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan
| | - James J. Galligan
- 1Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan,2Neuroscience Program, Michigan State University, East Lansing, Michigan
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Peripheral 5-HT3 Receptors Are Involved in the Antinociceptive Effect of Bunodosine 391. Toxins (Basel) 2017; 10:toxins10010012. [PMID: 29280949 PMCID: PMC5793099 DOI: 10.3390/toxins10010012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 12/06/2017] [Accepted: 12/20/2017] [Indexed: 12/27/2022] Open
Abstract
Bunodosine 391 (BDS 391), a low molecular weight compound isolated from the sea anemone Bunodosoma cangicum, increases the nociceptive threshold and inhibits inflammatory hyperalgesia. Serotonin receptors are involved in those effects. In this study, we have expanded the characterization of the antinociceptive effect of BDS 391 demonstrating that, in rats: (a) the compound inhibits (1.2–12 ng/paw) overt pain, in the formalin test, and mechanical hyperalgesia (0.6–6.0 ng/paw) detected in a model of neuropathic pain; (b) intraplantar administration of ondansetron, a selective 5-HT3 receptor antagonist, blocks the effect of BDS 391, whereas ketanserin, a 5-HT2 receptor antagonist, partially reversed this effect, indicating the involvement of peripheral 5-HT2 and 5-HT3 receptors in BDS 391 antinociception; and (c) in binding assay studies, BDS 391 was not able to displace the selective 5-HT receptor antagonists, suggesting that this compound does not directly bind to these receptors. The effect of biguanide, a selective 5-HT3 receptor agonist, was also evaluated. The agonist inhibited the formalin’s nociceptive response, supporting an antinociceptive role for 5-HT3 receptors. Our study is the first one to show that a non-peptidic low molecular weight compound obtained from a sea anemone is able to induce antinociception and that activation of peripheral 5-HT3 receptors contributes to this effect.
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Silva VDG, Reis AS, Pinz MP, da Fonseca CAR, Duarte LFB, Roehrs JA, Alves D, Luchese C, Wilhelm EA. Further analysis of acute antinociceptive and anti-inflammatory actions of 4-phenylselenyl-7-chloroquinoline in mice. Fundam Clin Pharmacol 2017; 31:513-525. [PMID: 28543930 DOI: 10.1111/fcp.12295] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 04/24/2017] [Accepted: 05/19/2017] [Indexed: 12/11/2022]
Abstract
A new quinoline containing selenium, 4-phenylselenyl-7-chloroquinoline (4-PSQ), was described and synthetized by our research group. Recently, we demonstrated the potential antinociceptive and anti-inflammatory of 4-PSQ. For this reason, the first objective of this study was to expand our previous findings by investigating the contribution of glutamatergic, serotonergic, and nitrergic systems to the acute antinociceptive action of this compound. Pretreatment with 4-PSQ (0.01-25 mg/kg, p.o.) reduced the nociception induced by glutamate. MK-801 (an uncompetitive antagonist of the N-Methyl-d-aspartate (NMDA) receptor) blocked the antinociceptive effect exerted by 4-PSQ (25 mg/kg, p.o.) in the acetic acid-induced abdominal writhing test. The pretreatment with WAY100635 (a selective antagonist of 5-HT1A receptor), ketanserin (a selective antagonist of 5-HT2A/2C receptor), and pindolol (a nonselective antagonist of 5-HT1A/1B receptors) partially blocked the antinociceptive effect caused by 4-PSQ (25 mg/kg, per oral, p.o.) in the acetic acid-induced abdominal writhing test. Nitric oxide precursor, l-arginine hydrochloride, partially reversed antinociception caused by 4-PSQ or ω-nitro-l-arginine (l-NOARG). Treatments did not modify the locomotor and exploratory activities of mice. Additionally, the acute anti-inflammatory effect of 4-PSQ in a model of pleurisy induced by carrageenan in mice was investigated. 4-PSQ reduced the cellular migration, pleural exudate accumulation, and myeloperoxidase activity induced by carrageenan exposure. 4-PSQ protected against the increase in reactive species levels and reduction of nonprotein thiol levels induced by carrageenan. Data presented here showed that the modulation of serotonergic, nitrergic, and glutamatergic systems contributed to the antinociceptive effect of 4-PSQ and it reinforced the therapeutic potential of this quinolinic compound for acute inflammation.
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Affiliation(s)
- Vanessa D G Silva
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Angélica S Reis
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Mikaela P Pinz
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Caren A R da Fonseca
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Luis Fernando B Duarte
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Juliano A Roehrs
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa - LASOL - CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Cristiane Luchese
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
| | - Ethel A Wilhelm
- Laboratório de Pesquisa em Farmacologia Bioquímica - LaFarBio - Grupo de Pesquisa em Neurobiotecnologia, CCQFA - Universidade Federal de Pelotas, UFPel - P.O. Box 354, 96010-900, Pelotas, RS, Brazil
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The developmental emergence of differential brainstem serotonergic control of the sensory spinal cord. Sci Rep 2017; 7:2215. [PMID: 28533557 PMCID: PMC5440407 DOI: 10.1038/s41598-017-02509-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 04/12/2017] [Indexed: 12/29/2022] Open
Abstract
Descending connections from brainstem nuclei are known to exert powerful control of spinal nociception and pain behaviours in adult mammals. Here we present evidence that descending serotonergic fibres not only inhibit nociceptive activity, but also facilitate non-noxious tactile activity in the healthy adult rat spinal dorsal horn via activation of spinal 5-HT3 receptors (5-HT3Rs). We further show that this differential serotonergic control in the adult emerges from a non-modality selective system in young rats. Serotonergic fibres exert background 5-HT3R mediated facilitation of both tactile and nociceptive spinal activity in the first three postnatal weeks. Thus, differential descending serotonergic control of spinal touch and pain processing emerges in late postnatal life to allow flexible and context-dependent brain control of somatosensation.
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16
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Ritter KE, Southard-Smith EM. Dynamic Expression of Serotonin Receptor 5-HT3A in Developing Sensory Innervation of the Lower Urinary Tract. Front Neurosci 2017; 10:592. [PMID: 28111539 PMCID: PMC5216032 DOI: 10.3389/fnins.2016.00592] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 12/12/2016] [Indexed: 12/12/2022] Open
Abstract
Sensory afferent signaling is required for normal function of the lower urinary tract (LUT). Despite the wide prevalence of bladder dysfunction and pelvic pain syndromes, few effective treatment options are available. Serotonin receptor 5-HT3A is a known mediator of visceral afferent signaling and has been implicated in bladder function. However, basic expression patterns for this gene and others among developing bladder sensory afferents that could be used to inform regenerative efforts aimed at treating deficiencies in pelvic innervation are lacking. To gain greater insight into the molecular characteristics of bladder sensory innervation, we conducted a thorough characterization of Htr3a expression in developing and adult bladder-projecting lumbosacral dorsal root ganglia (DRG) neurons. Using a transgenic Htr3a-EGFP reporter mouse line, we identified 5-HT3A expression at 10 days post coitus (dpc) in neural crest derivatives and in 12 dpc lumbosacral DRG. Using immunohistochemical co-localization we observed Htr3a-EGFP expression in developing lumbosacral DRG that partially coincides with neuropeptides CGRP and Substance P and capsaicin receptor TRPV1. A majority of Htr3a-EGFP+ DRG neurons also express a marker of myelinated Aδ neurons, NF200. There was no co-localization of 5-HT3A with the TRPV4 receptor. We employed retrograde tracing in adult Htr3a-EGFP mice to quantify the contribution of 5-HT3A+ DRG neurons to bladder afferent innervation. We found that 5-HT3A is expressed in a substantial proportion of retrograde traced DRG neurons in both rostral (L1, L2) and caudal (L6, S1) axial levels that supply bladder innervation. Most bladder-projecting Htr3a-EGFP+ neurons that co-express CGRP, Substance P, or TRPV1 are found in L1, L2 DRG, whereas Htr3a-EGFP+, NF200+ bladder-projecting neurons are from the L6, S1 axial levels. Our findings contribute much needed information regarding the development of LUT innervation and highlight the 5-HT3A serotonin receptor as a candidate for future studies of neurally mediated bladder control.
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Affiliation(s)
- K Elaine Ritter
- Division of Genetic Medicine, Department of Medicine, Vanderbilt University School of Medicine Nashville, TN, USA
| | - E Michelle Southard-Smith
- Division of Genetic Medicine, Department of Medicine, Vanderbilt University School of Medicine Nashville, TN, USA
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17
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Chung ASJ, Cheng JNC, Tse V. Psychotropic Drugs and Their Effects on Lower Urinary Tract Function: an Update. CURRENT BLADDER DYSFUNCTION REPORTS 2016. [DOI: 10.1007/s11884-016-0372-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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