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Adrenomedullin and nitric oxide in children with detrusor instability

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Abstract.

Detrusor instability (DI) and detrusor-external sphincter dyssynergia lead to poor bladder emptying and high bladder pressure. Recent results indicate that nitric oxide (NO) is an important transmitter or messenger molecule in autonomic neurotransmission. Adrenomedullin (AM) is a potent vasodilator and natriuretic peptide, originally purified from human pheochromocytoma. Since NO and AM have vasodilatory effects on smooth muscles, we considered them to be of interest in children with DI. We determined the tissue levels of NO and AM in 14 children with DI, and compared these with 6 children with normal bladder activity. Bladder biopsy total nitrite levels (nmol/g tissue) were decreased in children with DI (10.69±0.91 vs. 12.83±0.98, P<0.01). However, AM levels (pmol/g tissue) were increased in the same patients (48.84±3.52 vs. 28.79±1.53, P<0.001). According to our results, decreased NO production probably has a role in the pathophysiology of DI, although increased AM appears to be compensatory. NO may provide a therapeutic target in clinical situations related to DI. However, the functional significance of AM and NO in bladder smooth muscle remains to be determined by further detailed studies.

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Authors and Affiliations

  1. Department of Pediatric Nephrology, Medical Faculty, Gaziantep University, Turkey

    Ayşe Balat

  2. Department of Urology, Medical Faculty, Gaziantep University, Turkey

    Kemal Sarıca, Faruk Yağcı & Ahmet Erbağcı

  3. Department of Biochemistry, Kocaeli University, Turkey

    Mustafa Çekmen

  4. Department of Molecular Biology, Inonu University, Turkey

    Muhittin Yürekli

  5. Department of Pediatrics, Gaziantep University, PK:34, 27310, Gaziantep, Turkey

    Ayşe Balat

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  1. Ayşe Balat
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  2. Kemal Sarıca
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  3. Mustafa Çekmen
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  4. Muhittin Yürekli
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  5. Faruk Yağcı
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  6. Ahmet Erbağcı
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Correspondence to Ayşe Balat.

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Balat, A., Sarıca, K., Çekmen, M. et al. Adrenomedullin and nitric oxide in children with detrusor instability. Pediatr Nephrol 18, 422–425 (2003). https://doi.org/10.1007/s00467-003-1125-1

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  • DOI: https://doi.org/10.1007/s00467-003-1125-1

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