TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channels
Objective(s): To investigate the potential of Tropomyosin receptor kinase A (TrkA) for the treatment of interstitial cystitis/ bladder pain syndrome (IC/BPS).Materials and Methods: Sixty-four female rats were randomly assigned to the control and cyclophosphamide (CYP) groups. Quantitative reverse tr...
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| Format: | Article |
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Mashhad University of Medical Sciences
2023-06-01
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| Series: | Iranian Journal of Basic Medical Sciences |
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| Online Access: | https://ijbms.mums.ac.ir/article_22166_a71978137de83c1fa1f3258b368aa945.pdf |
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| author | Qian Liu Xiaodong Li Jingzhen Zhu Bishao Sun Shadan Li |
| author_facet | Qian Liu Xiaodong Li Jingzhen Zhu Bishao Sun Shadan Li |
| author_sort | Qian Liu |
| collection | DOAJ |
| description | Objective(s): To investigate the potential of Tropomyosin receptor kinase A (TrkA) for the treatment of interstitial cystitis/ bladder pain syndrome (IC/BPS).Materials and Methods: Sixty-four female rats were randomly assigned to the control and cyclophosphamide (CYP) groups. Quantitative reverse transcription polymerase chain reaction was utilized to detect the mRNA level of TrkA. Western blot analysis was used to measure the protein levels of TNF-α, IL-6, and TrkA. Immunostaining was used to detect the expression of TrkA in bladder sections. Contractility studies and urodynamic measurements were utilized to test the spontaneous contractions of detrusor muscle strips and the global bladder activity, respectively.Results: Rat models of chronic cystitis were successfully established. The mRNA and protein levels of TrkA were significantly increased in the bladders of CYP-treated rats. Also, results of immunohistochemical staining and immunofluorescence staining showed that increased TrkA expression in the CYP group was mainly observed in the urothelium layer and bladder interstitial Cajal-like cells (ICC-LCs) but not in the detrusor smooth muscle cells. The specific inhibitor of TrkA, GW441756 (10 μM), significantly suppressed the robust spontaneous contractions of detrusor muscle strips in the CYP group and alleviated the overall bladder overactivity of CYP-treated rats. However, the inhibitory effects of GW441756 (10 μM) on the spontaneous contractions of detrusor muscle strips and the overall bladder activity were eliminated after pretreatments with the specific blocker of hyperpolarization-activated cyclic nucleotide-gated (HCN) channels, ZD7288 (50 μM).Conclusion: Our results suggested that increased TrkA expression during chronic cystitis promotes the development of bladder overactivity by targeting the HCN channels. |
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| issn | 2008-3866 2008-3874 |
| language | English |
| last_indexed | 2024-03-12T00:04:14Z |
| publishDate | 2023-06-01 |
| publisher | Mashhad University of Medical Sciences |
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| series | Iranian Journal of Basic Medical Sciences |
| spelling | doaj.art-7d805ea219fa475db4809cfc6ffd2d1b2023-09-17T06:20:28ZengMashhad University of Medical SciencesIranian Journal of Basic Medical Sciences2008-38662008-38742023-06-0126670170710.22038/ijbms.2023.68528.1494322166TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channelsQian Liu0Xiaodong Li1Jingzhen Zhu2Bishao Sun3Shadan Li4Clinical Medicine Postdoctoral Research Station, The First Affiliated Hospital of Chongqing Medical University, Chongqing, ChinaDepartment of Urology, The General Hospital of Western Theater Command, Chengdu, ChinaDepartment of Urology, Second Affiliated Hospital, Army Medical University, Chongqing, ChinaDepartment of Urology, Second Affiliated Hospital, Army Medical University, Chongqing, ChinaDepartment of Urology, The General Hospital of Western Theater Command, Chengdu, ChinaObjective(s): To investigate the potential of Tropomyosin receptor kinase A (TrkA) for the treatment of interstitial cystitis/ bladder pain syndrome (IC/BPS).Materials and Methods: Sixty-four female rats were randomly assigned to the control and cyclophosphamide (CYP) groups. Quantitative reverse transcription polymerase chain reaction was utilized to detect the mRNA level of TrkA. Western blot analysis was used to measure the protein levels of TNF-α, IL-6, and TrkA. Immunostaining was used to detect the expression of TrkA in bladder sections. Contractility studies and urodynamic measurements were utilized to test the spontaneous contractions of detrusor muscle strips and the global bladder activity, respectively.Results: Rat models of chronic cystitis were successfully established. The mRNA and protein levels of TrkA were significantly increased in the bladders of CYP-treated rats. Also, results of immunohistochemical staining and immunofluorescence staining showed that increased TrkA expression in the CYP group was mainly observed in the urothelium layer and bladder interstitial Cajal-like cells (ICC-LCs) but not in the detrusor smooth muscle cells. The specific inhibitor of TrkA, GW441756 (10 μM), significantly suppressed the robust spontaneous contractions of detrusor muscle strips in the CYP group and alleviated the overall bladder overactivity of CYP-treated rats. However, the inhibitory effects of GW441756 (10 μM) on the spontaneous contractions of detrusor muscle strips and the overall bladder activity were eliminated after pretreatments with the specific blocker of hyperpolarization-activated cyclic nucleotide-gated (HCN) channels, ZD7288 (50 μM).Conclusion: Our results suggested that increased TrkA expression during chronic cystitis promotes the development of bladder overactivity by targeting the HCN channels.https://ijbms.mums.ac.ir/article_22166_a71978137de83c1fa1f3258b368aa945.pdfcyclophosphamidecystitishyperpolarization-activated-cyclic nucleotide-gated channelstropomyosin receptor-kinase aurinary bladder |
| spellingShingle | Qian Liu Xiaodong Li Jingzhen Zhu Bishao Sun Shadan Li TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channels Iranian Journal of Basic Medical Sciences cyclophosphamide cystitis hyperpolarization-activated-cyclic nucleotide-gated channels tropomyosin receptor-kinase a urinary bladder |
| title | TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channels |
| title_full | TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channels |
| title_fullStr | TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channels |
| title_full_unstemmed | TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channels |
| title_short | TrkA inhibition alleviates bladder overactivity in cyclophosphamide-induced cystitis by targeting hyperpolarization-activated cyclic nucleotide-gated channels |
| title_sort | trka inhibition alleviates bladder overactivity in cyclophosphamide induced cystitis by targeting hyperpolarization activated cyclic nucleotide gated channels |
| topic | cyclophosphamide cystitis hyperpolarization-activated-cyclic nucleotide-gated channels tropomyosin receptor-kinase a urinary bladder |
| url | https://ijbms.mums.ac.ir/article_22166_a71978137de83c1fa1f3258b368aa945.pdf |
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