Female reproductive tract pain: targets, challenges, and outcomes

Phillip Jobling, Kate O’Hara, Susan Hua
In: Frontiers in Pharmacology · 2014 · vol. 5 , pp. 17 · doi:10.3389/fphar.2014.00017 · PMID:24592238 · PMC3923189 · W2151540668
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⚙ AI-generated summary by claude@2026-06, 2026-06-07 ⓘ

This paper reviews potential targets and challenges for treating female reproductive tract pain, highlighting limited neurophysiological knowledge and considering topical drug delivery alongside improved experimental models.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-07 ⓘ

This paper is a narrative review examining pain from the female reproductive tract (vagina, cervix, uterus), focusing on the neuroanatomy and potential peripheral therapeutic targets on sensory neurons, as well as challenges such as poor basic characterization and the need for topical drug delivery models. It synthesizes evidence that FRT pain is mediated by heterogeneous sensory afferents responsive to distension and inflammatory mediators, that central sensitization and crosstalk with bladder and bowel can maintain pelvic pain despite removal of pathology, and that ovarian hormones (especially estrogen and its withdrawal at menopause) modulate pain thresholds and hyperalgesia. Key findings are that despite multiple candidate targets (opioid receptors, TRP channels like TRPV1, and trophic factors such as NGF), information on FRT-specific basic neurophysiology and functional validation is limited, and the review explicitly calls for more robust in vivo and in vitro models. This paper is centrally about endometriosis—endometriosis is mentioned only tangentially as one of several predictors of chronic pelvic pain, but the mechanistic discussion of FRT pain targets, sensitization, and comorbidity provides contextual relevance to endometriosis-associated pelvic pain.

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Abstract

Pain from the female reproductive tract (FRT) is a significant clinical problem for which there are few effective therapies. The complex neuroanatomy of pelvic organs not only makes diagnosis of pelvic pain disorders difficult but represents a challenge to development of targeted therapies. A number of potential therapeutic targets have been identified on sensory neurons supplying the FRT but our knowledge on the basic neurophysiology of these neurons is limited compared with other viscera. Until this is addressed we can only guess if the new experimental therapies proposed for somatic, gastrointestinal, or bladder pain will translate to the FRT. Once suitable therapeutic targets become clear, the next challenge is drug delivery. The FRT represents a promising system for topical drug delivery that could be tailored to act locally or systemically depending on formulation. Development of these therapies and their delivery systems will need to be done in concert with more robust in vivo and in vitro models of FRT pain.

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