Publications by authors named "Shiori Hiramoto"

Chemotherapy-induced peripheral neuropathy (CIPN) is a dose-limiting adverse reaction in cancer patients treated with several cytotoxic anticancer agents including paclitaxel. Duloxetine, an antidepressant known as a serotonin-noradrenalin reuptake inhibitor, is the only agent that has moderate evidence for the use to treat painful CIPN. The present retrospective cohort study aimed to analyze risk factors for paclitaxel-induced peripheral neuropathy (PIPN), and investigate ongoing prescription drug use for PIPN in Japan.

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We performed clinical retrospective study in female cancer patients and fundamental experiments in mice, in order to clarify risk factors for paclitaxel-induced peripheral neuropathy (PIPN). In the clinical study, 131 of 189 female outpatients with cancer undergoing paclitaxel-based chemotherapy met inclusion criteria. Breast cancer survivors (n = 40) showed significantly higher overall PIPN (grades 1-4) incidence than non-breast cancer survivors (n = 91).

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Article Synopsis
  • Cystitis-related bladder pain in mice is linked to the activation of the RAGE receptor by HMGB1 and increased activity of T-type calcium channels, influenced by an enzyme called cystathionine-γ-lyase (CSE) after treatment with cyclophosphamide (CPA).
  • The study found that blocking either the T-type calcium channels or CSE reduces bladder pain and that inhibiting HMGB1 or its signaling pathway also prevents pain development.
  • Acrolein, a compound produced from CPA, triggers the release of ATP in bladder cells, which promotes inflammation and subsequent pain through a series of cell signaling events involving reactive oxygen species.
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HMGB1, a nuclear protein, once released to the extracellular space, promotes somatic and visceral pain signals. We thus analyzed the role of HMGB1 in an intravesical substance P-induced bladder pain syndrome (BPS) mouse model. Intravesical administration of substance P caused referred hyperalgesia/allodynia in the lower abdomen and hindpaw without producing severe urothelial damage, which was prevented by an anti-HMGB1-neutralizing antibody, thrombomodulin α capable of inactivating HMGB1 and antagonists of RAGE or CXCR4.

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