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Astruc A, Roux L, Robin F, Sall NR, Dion L, Lavoué V, Legendre G, Leveque J, Bessede T, Bertrand M, Odimba Mpoy J, Nzau-Ngoma E, Morandi X, Chedotal A, Le Lous M, Nyangoh Timoh K. Advanced Insights into Human Uterine Innervation: Implications for Endometriosis and Pelvic Pain. J Clin Med 2024; 13:1433. [PMID: 38592287 PMCID: PMC10932059 DOI: 10.3390/jcm13051433] [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: 12/31/2023] [Revised: 02/08/2024] [Accepted: 02/16/2024] [Indexed: 04/10/2024] Open
Abstract
(1) Background: Understanding uterine innervation, an essential aspect of female reproductive biology, has often been overlooked. Nevertheless, the complex architecture of uterine innervation plays a significant role in conditions such as endometriosis. Recently, advances in histological techniques have provided unprecedented details about uterine innervation, highlighting its intricate structure, distribution, and density. The intricate nature of uterine innervation and its influence on pathologies such as endometriosis has garnered increasing attention. (2) Objectives: This review aims to compile, analyze, and summarize the existing research on uterine innervation, and investigate its implications for the pathogenesis of endometriosis and associated pain. (3) Methods: A systematic review was conducted in line with PRISMA guidelines. Using the PubMed database, we searched relevant keywords such as "uterine innervation", "endometriosis", and "pain association". (4) Results: The initial literature search yielded a total of 3300 potential studies. Of these, 45 studies met our inclusion criteria and were included in the final review. The analyzed studies consistently demonstrated that the majority of studies focused on macroscopic dissection of uterine innervation for surgical purposes. Fewer studies focused on micro-innervation for uterine innervation. For endometriosis, few studies focused on neural pain pathways whereas many studies underlined an increase in nerve fiber density within ectopic endometrial tissue. This heightened innervation is suggested as a key contributor to the chronic pain experienced by endometriosis patients. (5) Conclusions: The understanding of uterine innervation, and its alterations in endometriosis, offer promising avenues for research and potential treatment.
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Affiliation(s)
- Audrey Astruc
- Laboratoire d’Anatomie et d’Organogenèse, Faculté de Médecine, Centre Hospitalier Universitaire de Rennes, 35000 Rennes, France; (A.A.); (L.R.); (X.M.)
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
- Department of Obstetrics and Gynecology, Angers University Hospital, 49100 Angers, France;
| | - Léa Roux
- Laboratoire d’Anatomie et d’Organogenèse, Faculté de Médecine, Centre Hospitalier Universitaire de Rennes, 35000 Rennes, France; (A.A.); (L.R.); (X.M.)
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
| | - Fabien Robin
- H2P2 Histopathology Laboratory, Rennes 1 University, 35000 Rennes, France;
- Department of Hepatobiliary and Digestive Surgery, University Hospital, Rennes 1 University, 35000 Rennes, France
- INSERM U1242, Chemistry Oncogenesis Stress Signaling, Rennes 1 University, 35000 Rennes, France
| | - Ndeye Racky Sall
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
- INSERM, LTSI—UMR 1099, Rennes 1 University, 35000 Rennes, France
| | - Ludivine Dion
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
- INSERM, IRSET—UMR_S 1085, 35000 Rennes, France
| | - Vincent Lavoué
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
- INSERM, IRSET—UMR_S 1085, 35000 Rennes, France
| | - Guillaume Legendre
- Department of Obstetrics and Gynecology, Angers University Hospital, 49100 Angers, France;
| | - Jean Leveque
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
| | - Thomas Bessede
- Urology Department, APHP, Université Paris-Saclay, 94270 Le Kremlin-Bicetre, France;
| | - Martin Bertrand
- Surgery Department, Nîmes University Hospital, University of Montpellier, 30900 Nîmes, France;
| | - Jules Odimba Mpoy
- Department of Obstetrics and Gynecology, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo; (J.O.M.); (E.N.-N.)
| | - Emmanuel Nzau-Ngoma
- Department of Obstetrics and Gynecology, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo; (J.O.M.); (E.N.-N.)
| | - Xavier Morandi
- Laboratoire d’Anatomie et d’Organogenèse, Faculté de Médecine, Centre Hospitalier Universitaire de Rennes, 35000 Rennes, France; (A.A.); (L.R.); (X.M.)
- INSERM, LTSI—UMR 1099, Rennes 1 University, 35000 Rennes, France
| | - Alain Chedotal
- INSERM, CNRS, Institut de la Vision, Sorbonne Université, 75012 Paris, France;
| | - Maela Le Lous
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
- INSERM, LTSI—UMR 1099, Rennes 1 University, 35000 Rennes, France
| | - Krystel Nyangoh Timoh
- Laboratoire d’Anatomie et d’Organogenèse, Faculté de Médecine, Centre Hospitalier Universitaire de Rennes, 35000 Rennes, France; (A.A.); (L.R.); (X.M.)
- Department of Obstetrics and Gynecology, Rennes University Hospital, 35000 Rennes, France; (N.R.S.); (L.D.); (V.L.); (J.L.); (M.L.L.)
- INSERM, LTSI—UMR 1099, Rennes 1 University, 35000 Rennes, France
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Inflammatory Mediators and Pain in Endometriosis: A Systematic Review. Biomedicines 2021; 9:biomedicines9010054. [PMID: 33435569 PMCID: PMC7826862 DOI: 10.3390/biomedicines9010054] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/01/2021] [Accepted: 01/03/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND pain is one of the main symptoms of endometriosis and it has a deleterious effect on a patients' personal and social life. To date, the clinical management of pain includes prolonged medication use and, in some cases, surgery, both of which are disruptive events for patients. Hence, there is an urgency for the development of a sufficient non-invasive medical treatment. Inflammation is one of the causative factors of pain in endometriosis. It is well established that inflammatory mediators promote angiogenesis and interact with the sensory neurons inducing the pain signal; the threshold of pain varies and it depends on the state and location of the disease. The inhibition of inflammatory mediators' synthesis might offer a novel and effective treatment of the pain that is caused by inflammation in endometriosis. OBJECTIVES patients with endometriosis experience chronic pelvic pain, which is moderate to severe in terms of intensity. The objective of this systematic review is to highlight the inflammatory mediators that contribute to the induction of pain in endometriosis and present their biological mechanism of action. In addition, the authors aim to identify new targets for the development of novel treatments for chronic pelvic pain in patients with endometriosis. DATA SOURCES three databases (PubMed, Scopus, and Europe PMC) were searched in order to retrieve articles with the keywords 'inflammation, pain, and endometriosis' between the review period of 1 January 2016 to 31 December 2020. This review has been registered with PROSPERO (registry number: CRD42020171018). Eligibility Criteria: only original articles that presented the regulation of inflammatory mediators and related biological molecules in endometriosis and their contribution in the stimulation of pain signal were included. DATA EXTRACTION two authors independently extracted data from articles, using predefined criteria. RESULTS the database search yielded 1871 articles, which were narrowed down to 56 relevant articles of interest according to the eligibility criteria. CONCLUSIONS inflammatory factors that promote angiogenesis and neuroangiogenesis are promising targets for the treatment of inflammatory pain in endometriosis. Specifically, CXC chemokine family, chemokine fractalkine, and PGE2 have an active role in the induction of pain. Additionally, IL-1β appears to be the primary interleukin (IL), which stimulates the majority of the inflammatory factors that contribute to neuroangiogenesis along with IL-6. Finally, the role of Ninj1 and BDNF proteins needs further investigation.
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Vardenafil and cilostazol can improve vascular reactivity in rats with diabetes mellitus and rheumatoid arthritis co-morbidity. Life Sci 2019; 229:67-79. [PMID: 31085245 DOI: 10.1016/j.lfs.2019.05.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 04/27/2019] [Accepted: 05/10/2019] [Indexed: 12/17/2022]
Abstract
Endothelial dysfunction and vascular reactivity defects secondary to metabolic and immunological disorders carry risk of serious cardiovascular complications. Here, the effects of the phosphodiesterase (PDE) inhibitors vardenafil and cilostazol were examined against rheumatoid arthritis (RA)/diabetes mellitus (DM)-co-morbidity-induced endothelial dysfunction and vascular reactivity defects. After setting of RA/DM-co-morbidity model, rats were divided into a normal control group, an RA/DM-co-morbidity group, and two treatment groups receiving oral vardenafil (10 mg/kg/day) and cilostazol (30 mg/kg/day) for 21 days after RA/DM-co-morbidity induction. Aorta was isolated for biochemical estimations of the pro-inflammatory vasoconstrictor molecules angiotensin-II (Ang-II) and endothelin-1 (ET-1), the adhesion molecules P-selectin and vascular cell adhesion molecule-1 (VCAM-1), the energy sensor adenosine-5'-monophosphate-activated protein kinase (AMPK), and the vasodilator anti-inflammatory molecule vasoactive intestinal peptide (VIP) using enzyme-linked immunosorbent assay (ELISA) and western blot analysis. Immunohistochemical estimations of endothelial nitric oxide synthase (eNOS) and matrix metalloproteinase (MMP)-2 were performed coupled with histopathological examination using routine hematoxylin and eosin (H&E) and special Masson trichrome staining. The in vitro study was conducted using aortic strips where cumulative concentration response curves were done for the endothelium-dependent relaxing factor acetylcholine and the endothelium-independent relaxing factor sodium nitroprusside after submaximal contraction with phenylephrine. Vardenafil and cilostazol significantly improved endothelial integrity biomarkers in vivo supported with histopathological findings in addition to improved vasorelaxation in vitro. Apart from their known PDE inhibition, up-regulation of vascular AMPK and eNOS coupled with down-regulation of Ang-II, ET-1, P-selectin, VCAM-1 and MMP-2 may explain vardenafil and cilostazol protective effect against RA/DM-co-morbidity-induced endothelial dysfunction and vascular reactivity defects.
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