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Presto P, Mazzitelli M, Junell R, Griffin Z, Neugebauer V. Sex differences in pain along the neuraxis. Neuropharmacology 2022; 210:109030. [DOI: 10.1016/j.neuropharm.2022.109030] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/24/2022] [Accepted: 03/12/2022] [Indexed: 12/30/2022]
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Lee YH, Lee KM, Auh QS, Hong JP. Sex-related differences in symptoms of temporomandibular disorders and structural changes in the lateral pterygoid muscle after whiplash injury. J Oral Rehabil 2019; 46:1107-1120. [PMID: 31228222 DOI: 10.1111/joor.12845] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 05/28/2019] [Accepted: 06/17/2019] [Indexed: 12/31/2022]
Abstract
Whiplash injury is an initiating or aggravating factor of temporomandibular disorder (TMD). Although there are sex-related differences in the mechanism of pain perception and pain control, there is a lack of research on differences in TMD after whiplash injury. We aimed to evaluate sex-related differences in the clinical symptoms and magnetic resonance imaging (MRI) findings of patients with TMD attributed to whiplash injury. This retrospective, cross-sectional study included 100 patients (50 women; 50 men; mean age, 37.60 years) who visited our oro-facial pain clinic with symptoms of TMD after whiplash injury. All patients underwent detailed evaluations for history of trauma, and their clinical and MRI findings were comprehensively assessed. Women with TMD after whiplash injury perceived more pain and presented more tenderness upon palpation than did men with TMD. In addition, women showed higher volume (58% vs 26%) and signal changes (54% vs 20%) in the lateral pterygoid muscle (LPM) and more anterior disc displacement without reduction (ADDWoR) (40% vs 20%) than did men. The presence of ADDWoR (odds ratio, 10.58; P = 0.007) and condylar degeneration (odds ratio, 9.30; P = 0.015) predicted LPM volume; stressful conditions (beta = 1.34; P = 0.011) correlated with increased visual analogue scale scores, and sleep problem was associated with an increased palpation index (PI) (beta = 0.42; P < 0.001) and neck PI (beta = 0.49; P < 0.001) scores only in women. Our results showed sex-specific differences in pain intensity, distribution of clinical and abnormal MRI findings, and their relationships, and these differences should be considered when treating patients with TMD.
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Affiliation(s)
- Yeon-Hee Lee
- Department of Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Dongdaemun-gu, Seoul, Korea
| | - Kyung Mi Lee
- Department of Radiology, Kyung Hee University College of Medicine, Kyung Hee University Hospital, Dongdaemun-gu, Seoul, Korea
| | - Q-Schick Auh
- Department of Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Dongdaemun-gu, Seoul, Korea
| | - Jyung-Pyo Hong
- Department of Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Dongdaemun-gu, Seoul, Korea
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Khenioui H, Houvenagel E, Catanzariti JF, Guyot MA, Agnani O, Donze C. Usefulness of intra-articular botulinum toxin injections. A systematic review. Joint Bone Spine 2015; 83:149-54. [PMID: 26645160 DOI: 10.1016/j.jbspin.2015.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/24/2015] [Indexed: 10/22/2022]
Abstract
UNLABELLED Botulinum toxin is a proven and widely used treatment for numerous conditions characterized by excessive muscular contractions. Recent studies have assessed the analgesic effect of botulinum toxin in joint pain and started to unravel its mechanisms. LITERATURE-SEARCH-METHODOLOGY We searched the international literature via the Medline database using the term "intraarticular botulinum toxin injection" combined with any of the following terms: "knee", "ankle", "shoulder", "osteoarthritis", "adhesive capsulitis of the shoulder". RESULTS Of 16 selected articles about intraarticular botulinum toxin injections, 7 were randomized controlled trials done in patients with osteoarthritis, adhesive capsulitis of the shoulder, or chronic pain after joint replacement surgery. Proof of anti-nociceptive effects was obtained in some of these indications and the safety and tolerance profile was satisfactory. The studies are heterogeneous. The comparator was usually a glucocorticoid or a placebo; a single study used hyaluronic acid. Pain intensity was the primary outcome measure. DISCUSSION-CONCLUSION The number of randomized trials and sample sizes are too small to provide a satisfactory level of scientific evidence or statistical power. Unanswered issues include the effective dosage and the optimal dilution and injection modalities of botulinum toxin.
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Affiliation(s)
- Hichem Khenioui
- Service de médecine physique et de réadaptation, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France; Université Nord de France, 1, rue Lefèvre, 59000 Lille, France; Université catholique de Lille, 60, boulevard Vauban, 59800 Lille, France.
| | - Eric Houvenagel
- Université Nord de France, 1, rue Lefèvre, 59000 Lille, France; Université catholique de Lille, 60, boulevard Vauban, 59800 Lille, France; Service de rhumatologie, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France
| | - Jean François Catanzariti
- Service de médecine physique et de réadaptation, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France; Université Nord de France, 1, rue Lefèvre, 59000 Lille, France; Service de rhumatologie, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France; Service de médecine physique et réadaptation, centre de SSR pédiatrique Marc-Sautelet, 10, rue du Petit-Boulevard, 59650 Villeneuve-d'Ascq, France
| | - Marc Alexandre Guyot
- Service de médecine physique et de réadaptation, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France; Université Nord de France, 1, rue Lefèvre, 59000 Lille, France; Service de rhumatologie, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France
| | - Olivier Agnani
- Service de médecine physique et de réadaptation, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France; Université Nord de France, 1, rue Lefèvre, 59000 Lille, France; Service de rhumatologie, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France
| | - Cécile Donze
- Service de médecine physique et de réadaptation, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France; Université Nord de France, 1, rue Lefèvre, 59000 Lille, France; Service de rhumatologie, centre hospitalier Saint-Philibert, groupe hospitalier de l'institut catholique de Lille, 115, rue du Grand-But, BP 249, 59462 Lomme cedex, France
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Mak P, Broadbear JH, Kolosov A, Goodchild CS. Long-Term Antihyperalgesic and Opioid-Sparing Effects of 5-Day Ketamine and Morphine Infusion (“Burst Ketamine”) in Diabetic Neuropathic Rats. PAIN MEDICINE 2015; 16:1781-93. [DOI: 10.1111/pme.12735] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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A closer look to botulinum neurotoxin type A-induced analgesia. Toxicon 2013; 71:134-9. [PMID: 23747735 DOI: 10.1016/j.toxicon.2013.05.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 02/10/2013] [Accepted: 05/14/2013] [Indexed: 11/20/2022]
Abstract
Chronic pain indicates a type of pain that lasts over time and is accompanied by diagnostic and therapeutic difficulties. It follows that treatment failures are common and patients roam from doctor to doctor in search of an effective care program. So there is an urgent need for long-acting and effective therapeutics to alleviate symptoms of the varied forms of chronic pain. During the past few years, a good success has been achieved with a derivative of a neurotoxin. It has been shown that administration of this toxin can block the release of neurotransmitters and pain mediators. Botulinum neurotoxin type A (BoNT/A) is well known as a treatment for neuromuscular conditions such as dystonia and spasticity. However, the clinical application for BoNT/A has continued to expand. Its analgesic effect has been used in clinical practice with satisfactory results. This review provides an introduction of a hypothesis for the mechanism by which BoNT/A eases chronic pain. It also summarizes the clinical therapeutic effects of BoNT/A in different types of chronic pain and its potential prospects.
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Metabotropic glutamate antagonists alone and in combination with morphine: comparison across two models of acute pain and a model of persistent, inflammatory pain. Behav Pharmacol 2013; 22:785-93. [PMID: 21971021 DOI: 10.1097/fbp.0b013e32834d13a2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The present study examined the effects of the mGluR1 antagonist JNJ16259685 (JNJ) and the mGluR5 antagonist 2-methyl-6-phenylethynylpyridine (MPEP) alone and in combination with morphine in two acute pain models (hotplate, warm water tail-withdrawal), and a persistent, inflammatory pain model (capsaicin). In the hotplate and warm water tail-withdrawal procedures, JNJ and MPEP were ineffective when administered alone. In both procedures, JNJ potentiated morphine antinociception. In the hotplate procedure, MPEP potentiated morphine antinociception at the highest dose examined, whereas in the warm water tail-withdrawal procedure MPEP attenuated morphine antinociception at a moderate dose and potentiated morphine antinociception at a high dose. For both JNJ and MPEP, the magnitude of this morphine potentiation was considerably greater in the hotplate procedure. In the capsaicin procedure, the highest dose of MPEP produced intermediate levels of antihyperalgesia and also attenuated the effects of a dose of morphine that produced intermediate levels of antihyperalgesia. In contrast, JNJ had no effect when administered alone in the capsaicin procedure and did not alter morphine-induced antihyperalgesia. The present findings suggest that the effects produced by mGluR1 and mGluR5 antagonists alone and in combination with morphine can be differentiated in models of both acute and persistent pain.
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Hwang BY, Kim ES, Kim CH, Kwon JY, Kim HK. Gender differences in paclitaxel-induced neuropathic pain behavior and analgesic response in rats. Korean J Anesthesiol 2012; 62:66-72. [PMID: 22323957 PMCID: PMC3272532 DOI: 10.4097/kjae.2012.62.1.66] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 08/25/2011] [Accepted: 08/26/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Females show greater sensitivity than males to several modalities of experimental pain. However, the gender differences in paclitaxel-induced neuropathic pain have not been studied. The current study examined the gender differences in neuropathic pain behavior and the effect of analgesics in a paclitaxel-induced neuropathic pain model in rats. METHODS Neuropathic pain was induced by intraperitoneal injection of paclitaxel (2 mg/kg) on 4 alternate days in Sprague-Dawley rats of both genders. Mechanical allodynia was measured using a von Frey filament. The gender differences in analgesic responses were determined after administration of morphine (2 or 5 mg/kg), ketamine (2 or 5 mg/kg), or combined morphine (2 mg/kg) and ketamine (2 mg/kg). RESULTS Paclitaxel induced mechanical allodynia, which began to manifest on day 4, peaked within 10 days, and plateaued for at least 2 months after the first paclitaxel injection. No gender difference in the manifestation of mechanical allodynia was observed. A 2 mg/kg dose of ketamine increased the mechanical threshold only in males. The 5 mg/kg dose of ketamine significantly increased the mechanical threshold in both genders. Morphine (2 and 5 mg/kg) dose-dependently increased the mechanical thresholds in both genders. The 2 mg/kg dose of ketamine enhanced the antinociceptive effect of 2 mg/kg morphine only in females. CONCLUSIONS No gender difference in paclitaxel-induced neuropathic pain or analgesic response to ketamine or morphine was observed in Sprague-Dawley rats. Low dose ketamine enhanced the analgesic effect of morphine on paclitaxel-induced mechanical allodynia but only in female rats.
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Affiliation(s)
- Boo-Young Hwang
- Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Busan, Korea
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Gupta LK, Gupta R, Tripathi CD. N-Methyl-d-aspartate receptor modulators block hyperalgesia induced by acute low-dose morphine. Clin Exp Pharmacol Physiol 2011; 38:592-7. [DOI: 10.1111/j.1440-1681.2011.05556.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Ozdemir E, Bagcivan I, Gursoy S, Altun A, Durmus N. Effects of fluoxetine and LY 365265 on tolerance to the analgesic effect of morphine in rats. ACTA ACUST UNITED AC 2011; 98:205-13. [DOI: 10.1556/aphysiol.98.2011.2.12] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Effect of ketamine on endogenous pain modulation in healthy volunteers. Pain 2011; 152:656-663. [PMID: 21237568 DOI: 10.1016/j.pain.2010.12.015] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 10/21/2010] [Accepted: 12/09/2010] [Indexed: 01/10/2023]
Abstract
Inhibitory and facilitatory descending pathways, originating at higher central nervous system sites, modulate activity of dorsal horn nociceptive neurons, and thereby influence pain perception. Dysfunction of inhibitory pain pathways or a shift in the balance between pain facilitation and pain inhibition has been associated with the development of chronic pain. The N-methyl-d-aspartate receptor antagonist ketamine has a prolonged analgesic effect in chronic pain patients. This effect is due to desensitization of sensitized N-methyl-d-aspartate receptors. Additionally, ketamine may modulate or enhance endogenous inhibitory control of pain perception. Diffuse noxious inhibitory control (DNIC) and offset analgesia (OA) are 2 mechanisms involved in descending inhibition. The present study investigates the effect of a ketamine infusion on subsequent DNIC and OA responses to determine whether ketamine has an influence on descending pain control. Ten healthy subjects (4 men/6 women) received a 1-hour placebo or S(+)-ketamine (40mg per 70kg) infusion on 2 separate occasions in random order. Upon the termination of the infusion, DNIC and OA responses were obtained. After placebo treatment, significant descending inhibition of pain responses was present for DNIC and OA. In contrast, after ketamine infusion, no DNIC was observed, but rather a significant facilitatory pain response (P<0.01); the OA response remained unchanged. These findings suggest that the balance between pain inhibition and pain facilitation was shifted by ketamine towards pain facilitation. The absence of an effect of ketamine on OA indicates differences in the mechanisms and neurotransmitter influences between OA and DNIC. Diffuse noxious inhibitory control responses following a 1-hour low-dose ketamine treatment displayed facilitation of pain in response to experimental noxious thermal stimulation.
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Cannon CZ, Kissling GE, Hoenerhoff MJ, King-Herbert AP, Blankenship-Paris T. Evaluation of dosages and routes of administration of tramadol analgesia in rats using hot-plate and tail-flick tests. Lab Anim (NY) 2010; 39:342-51. [DOI: 10.1038/laban1110-342] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Accepted: 08/11/2010] [Indexed: 11/09/2022]
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Suski M, Bujak-Gizycka B, Madej J, Kacka K, Dobrogowski J, Woron J, Olszanecki R, Korbut R. Co-administration of dextromethorphan and morphine: reduction of post-operative pain and lack of influence on morphine metabolism. Basic Clin Pharmacol Toxicol 2010; 107:680-4. [PMID: 20346057 DOI: 10.1111/j.1742-7843.2010.00559.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigated co-analgesic effect of dextromethorphan in adolescent post-operative patients with idiopathic scoliosis. In a double-blind study, 60 patients with ASA physical status I-II were randomised into two groups. Group dextromethorphan (n = 30; age: 15.9 +/- 2.4 years) was given oral dextromethorphan 30 or 45 mg 1 hr before surgery and 8, 20 and 32 hr after operation. Group placebo (n = 30; age: 16.5 +/- 2.7 years) received placebo at identical times. Post-operative analgesic requirements were assessed using nurse-controlled analgesia system. Pain was assessed using numeric rating scale before first administration of morphine and at 2, 3, 4, 6, 24 and 48 hr after operation. Blood samples were taken 20 min. after the first use of morphine (within 1 hr after operation). The total use of analgesics during surgery was lower in the dextromethorphan group. The dose of morphine providing relief immediately after surgery, as well as total analgesic requirements in the first and second day after surgery did not differ between groups. Subjectively evaluated pain intensity score (numeric rating scale) was lower for the dextromethorphan patients in the first 4 hr, but not later after surgery. Plasma levels of morphine, morphine-6-glucuronide and morphine-3-glucuronide did not differ between groups. Dextromethorphan did not influence morphine glucuronidation, in terms of promotion of formation of any morphine glucuronides. In conclusion, in young patients subjected to spine surgery, addition of dextromethorphan to morphine reduced pain only in early post-operative period. In such patients, co-analgesic action of dextromethorphan was not associated with significant changes in plasma levels of morphine metabolites.
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Affiliation(s)
- Maciej Suski
- Chair of Pharmacology, Jagiellonian University Medical College, Krakow, Poland
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Mogil JS, Bailey AL. Sex and gender differences in pain and analgesia. PROGRESS IN BRAIN RESEARCH 2010; 186:141-57. [PMID: 21094890 DOI: 10.1016/b978-0-444-53630-3.00009-9] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
It is a clinical reality that women make up the large majority of chronic pain patients, and there is now consensus from laboratory experiments that when differences are seen, women are more sensitive to pain than men. Research in this field has now begun to concentrate on finding explanations for this sex difference. Although sex differences in sociocultural, psychological, and experiential factors likely play important roles, evidence largely from animal studies has revealed surprisingly robust and often qualitative sex differences at low levels of the neuraxis. Although not yet able to affect clinical practice, the continued study of sex differences in pain may have important implications for the development of new analgesic strategies.
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Affiliation(s)
- Jeffrey S Mogil
- Department of Psychology and Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada.
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Abstract
This paper is the 31st consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2008 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior (Section 2), and the roles of these opioid peptides and receptors in pain and analgesia (Section 3); stress and social status (Section 4); tolerance and dependence (Section 5); learning and memory (Section 6); eating and drinking (Section 7); alcohol and drugs of abuse (Section 8); sexual activity and hormones, pregnancy, development and endocrinology (Section 9); mental illness and mood (Section 10); seizures and neurologic disorders (Section 11); electrical-related activity and neurophysiology (Section 12); general activity and locomotion (Section 13); gastrointestinal, renal and hepatic functions (Section 14); cardiovascular responses (Section 15); respiration and thermoregulation (Section 16); and immunological responses (Section 17).
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, 65-30 Kissena Blvd, Flushing, NY 11367, United States.
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Fillingim RB, King CD, Ribeiro-Dasilva MC, Rahim-Williams B, Riley JL. Sex, gender, and pain: a review of recent clinical and experimental findings. THE JOURNAL OF PAIN 2009; 10:447-85. [PMID: 19411059 DOI: 10.1016/j.jpain.2008.12.001] [Citation(s) in RCA: 1736] [Impact Index Per Article: 115.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Revised: 11/04/2008] [Indexed: 02/07/2023]
Abstract
UNLABELLED Sex-related influences on pain and analgesia have become a topic of tremendous scientific and clinical interest, especially in the last 10 to 15 years. Members of our research group published reviews of this literature more than a decade ago, and the intervening time period has witnessed robust growth in research regarding sex, gender, and pain. Therefore, it seems timely to revisit this literature. Abundant evidence from recent epidemiologic studies clearly demonstrates that women are at substantially greater risk for many clinical pain conditions, and there is some suggestion that postoperative and procedural pain may be more severe among women than men. Consistent with our previous reviews, current human findings regarding sex differences in experimental pain indicate greater pain sensitivity among females compared with males for most pain modalities, including more recently implemented clinically relevant pain models such as temporal summation of pain and intramuscular injection of algesic substances. The evidence regarding sex differences in laboratory measures of endogenous pain modulation is mixed, as are findings from studies using functional brain imaging to ascertain sex differences in pain-related cerebral activation. Also inconsistent are findings regarding sex differences in responses to pharmacologic and non-pharmacologic pain treatments. The article concludes with a discussion of potential biopsychosocial mechanisms that may underlie sex differences in pain, and considerations for future research are discussed. PERSPECTIVE This article reviews the recent literature regarding sex, gender, and pain. The growing body of evidence that has accumulated in the past 10 to 15 years continues to indicate substantial sex differences in clinical and experimental pain responses, and some evidence suggests that pain treatment responses may differ for women versus men.
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Affiliation(s)
- Roger B Fillingim
- University of Florida, College of Dentistry, Gainesville, Florida 32610-3628, USA.
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Fillingim RB, King CD, Ribeiro-Dasilva MC, Rahim-Williams B, Riley JL. Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2008.12.001 order by 1-- #] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Fillingim RB, King CD, Ribeiro-Dasilva MC, Rahim-Williams B, Riley JL. Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2008.12.001 and 1880=1880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Fillingim RB, King CD, Ribeiro-Dasilva MC, Rahim-Williams B, Riley JL. Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2008.12.001 order by 1-- gadu] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Fillingim RB, King CD, Ribeiro-Dasilva MC, Rahim-Williams B, Riley JL. Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2008.12.001 order by 8029-- -] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2008.12.001 order by 1-- -] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Fillingim RB, King CD, Ribeiro-Dasilva MC, Rahim-Williams B, Riley JL. Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2008.12.001 order by 8029-- #] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Fillingim RB, King CD, Ribeiro-Dasilva MC, Rahim-Williams B, Riley JL. Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2008.12.001 order by 8029-- awyx] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Carmichael NME, Charlton MP, Dostrovsky JO. Sex differences in inflammation evoked by noxious chemical, heat and electrical stimulation. Brain Res 2009; 1276:103-11. [PMID: 19374887 DOI: 10.1016/j.brainres.2009.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 04/02/2009] [Accepted: 04/06/2009] [Indexed: 12/18/2022]
Abstract
Neurogenic inflammation (NI) is a feature of several inflammatory pain conditions in which females are overrepresented. Therefore, we asked if there are sex differences in the inflammatory response evoked by well known neurogenic stimuli. We compared the amount of plasma extravasation (PE), a measure of inflammation, in the hindpaw skin of male and female rats caused by subcutaneous injection of capsaicin, application of noxious heat (51 degrees C water bath) or electrical stimulation of the saphenous nerve. We also compared the amount of PE in males and females evoked by substance P (SP), the principal neurogenic mediator of PE. PE was quantified using a video camera and digital image analysis to measure changes in reflectance (pixel intensity, PI) of skin due to accumulation of extravasated Evans blue (EB) dye. The increase in PI induced by capsaicin was significantly greater in females compared to males (p<0.001) and in estrus, diestrus, and metestrus females compared to proestrus females. The time to reach maximal capsaicin-induced PE was two times longer in estrus, diestrus, and metestrus females compared to males (p<0.05). PE induced by heat was also significantly greater in females compared to males (p<0.001), however, there was no sex-related difference in PE induced by electrical stimulation or by injection of SP. These findings show that females have a greater inflammatory response when inflammation is induced by capsaicin and noxious heat suggesting possible sex-related changes in TRPV-1 receptor mediated mechanisms. These results add to the growing list of sex difference responses to noxious somatic stimulation.
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Affiliation(s)
- Nicole M E Carmichael
- Physiology Department, University of Toronto, Medical Science Building, 1 King's College Circle, Toronto, Ontario, Canada.
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