ArticleNaunyn-Schmiedeberg's archives of pharmacology2022
Estrogenic impregnation alters pain expression: analysis through functional neuropeptidomics in a surgical rat model of osteoarthritis.
Article in Naunyn-Schmiedeberg's archives of pharmacology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 10 citations in OpenAlex.
- Evoked temporal summation in dogs to assess pain central sensitization and modulation - A feasibility study.PloS one · 2026Article
- Global spinal cord peptidome profiling in response to osteoarthritis in rats.Molecular omics · 2025Article
- Comparative Pain Expression and Its Association to Intestinal Microbiota Through the MI-RAT© Osteoarthritis Model Induced in LOU/C/Jall and Sprague-Dawley Aged Rats.International journal of molecular sciences · 2025Article
- Translational validity of quantitative sensory testing in chronic pain neuro-sensitization: guide of use and interpretation in osteoarthritis animal models.Frontiers in pain research (Lausanne, Switzerland) · 2025Review
- Effectiveness of Total Knee Arthroplasty on Pain Reduction and Functional Improvement in Elderly Patients: A Quasi-Experimental Study.Advanced biomedical research · 2025Article
- Predictive and concurrent validity of pain sensitivity phenotype, neuropeptidomics and neuroepigenetics in the MI-RAT osteoarthritic surgical model in rats.Frontiers in cell and developmental biology · 2024Article
- Face and Predictive Validity of MI-RAT (International journal of molecular sciences · 2023Article
- Article
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Authors and funding
16 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeSeveral observational studies suggest that estrogens could bias pain perception. To evaluate the influence of estrogenic impregnation on pain expression, a prospective, randomized, controlled, blinded study was conducted in a Sprague-Dawley rat model of surgically induced osteoarthritis (OA).
methodsFemale rats were ovariectomized and pre-emptive 17β-estradiol (0.025 mg, 90-day release time) or placebo pellets were installed subcutaneously during the OVX procedures. Thirty-five days after, OA was surgically induced on both 17β-estradiol (OA-E) and placebo (OA-P) groups. Mechanical hypersensitivity was assessed by static weight-bearing (SWB) and paw withdrawal threshold (PWT) tests. Mass spectrometry coupled with high-performance liquid chromatography (HPLC-MS) was performed to quantify the spinal pronociceptive neuropeptides substance P (SP), calcitonin gene-related peptide (CGRP), bradykinin (BK), somatostatin (SST), and dynorphin-A (Dyn-A).
resultsCompared to control, ovariectomized rats presented higher SP (P = 0.009) and CGRP (P = 0.017) concentrations. OA induction increased the spinal level of SP (+ 33%, P < 0.020) and decreased the release of BK (- 20%, (P < 0.037)). The OA-E rats at functional assessment put more % body weight on the affected hind limb than OA-P rats at D7 (P = 0.027) and D56 (P = 0.033), and showed higher PWT at D56 (P = 0.009), suggesting an analgesic and anti-allodynic effect of 17β-estradiol. Interestingly, the 17β-estradiol treatment counteracted the increase of spinal concentration of Dyn-A (P < 0.016) and CGRP (P < 0.018).
conclusionThese results clearly indicate that 17β-estradiol interfers with the development of central sensitization and confirm that gender dimorphism should be considered when looking at pain evaluation.
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