Area under the curve analysis of blood pressure reveals increased spontaneous locomotor activity in SPAK knock-in mice

relevance for hypotension induced by SPAK inhibition?

Kieran Burgess, Sofija Jovanović, Rajni Sudhir, Aleksandar Jovanović (Lead / Corresponding author)

    Research output: Contribution to journalArticle

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    Abstract

    SPAK (Ste20/SPS1-related proline/alanine-rich kinase) has been recently identified as a protein kinase which targets the electroneutral cation-coupled chloride cotransporters and it stands out as a target for inhibition in novel anti-hypertensive agents. From this prospective, any information about physiological consequences of SPAK inhibition would be useful to better understand the efficacy and potential adverse effects of the SPAK-based anti-hypertensive therapy. Radiotelemetry was employed to continuously measure the parameters of blood pressure (mean arterial blood pressure, systolic blood pressure, and diastolic blood pressure), heart rate, and physical activity in SPAK knock-in (KI) mice and littermate controls for 24 h. For each parameter, the area under the curve (AUC) was calculated and compared between the SPAK KI mice and wild type mice. There was no statistically significant difference in the AUC of blood pressure parameters between SPAK KI and littermate mice. When mice were physically inactive, the AUCs for blood pressures were significantly lower in SPAK KI than in littermates. When physically active, blood pressures were significantly higher in SPAK KI than in littermates. The heart rate followed a similar pattern. The AUC of physical activity was significantly increased in SPAK KI mice when compared to littermates and the SPAK KI mice spent significantly less time in an inactive state and significantly more time in active states. Comparison between SPAK KI mice and unrelated wild type mice yielded similar results to the comparison between SPAK KI mice and littermates. We conclude that SPAK inhibition increases spontaneous locomotor activity, which has a significant effect on blood pressure.

    Original languageEnglish
    Article numbere13997
    Pages (from-to)1-12
    Number of pages12
    JournalPhysiological Reports
    Volume7
    Issue number3
    Early online date3 Feb 2019
    DOIs
    Publication statusPublished - 3 Feb 2019

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    Controlled Hypotension
    Locomotion
    Area Under Curve
    Blood Pressure
    PAS domain kinases
    Antihypertensive Agents
    Arterial Pressure
    Heart Rate

    Keywords

    • SPAK
    • Blood pressure
    • hypertension
    • locomotor activity

    Cite this

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    title = "Area under the curve analysis of blood pressure reveals increased spontaneous locomotor activity in SPAK knock-in mice: relevance for hypotension induced by SPAK inhibition?",
    abstract = "SPAK (Ste20/SPS1-related proline/alanine-rich kinase) has been recently identified as a protein kinase which targets the electroneutral cation-coupled chloride cotransporters and it stands out as a target for inhibition in novel anti-hypertensive agents. From this prospective, any information about physiological consequences of SPAK inhibition would be useful to better understand the efficacy and potential adverse effects of the SPAK-based anti-hypertensive therapy. Radiotelemetry was employed to continuously measure the parameters of blood pressure (mean arterial blood pressure, systolic blood pressure, and diastolic blood pressure), heart rate, and physical activity in SPAK knock-in (KI) mice and littermate controls for 24 h. For each parameter, the area under the curve (AUC) was calculated and compared between the SPAK KI mice and wild type mice. There was no statistically significant difference in the AUC of blood pressure parameters between SPAK KI and littermate mice. When mice were physically inactive, the AUCs for blood pressures were significantly lower in SPAK KI than in littermates. When physically active, blood pressures were significantly higher in SPAK KI than in littermates. The heart rate followed a similar pattern. The AUC of physical activity was significantly increased in SPAK KI mice when compared to littermates and the SPAK KI mice spent significantly less time in an inactive state and significantly more time in active states. Comparison between SPAK KI mice and unrelated wild type mice yielded similar results to the comparison between SPAK KI mice and littermates. We conclude that SPAK inhibition increases spontaneous locomotor activity, which has a significant effect on blood pressure.",
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    doi = "10.14814/phy2.13997",
    language = "English",
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    Area under the curve analysis of blood pressure reveals increased spontaneous locomotor activity in SPAK knock-in mice : relevance for hypotension induced by SPAK inhibition? / Burgess, Kieran; Jovanović, Sofija; Sudhir, Rajni; Jovanović, Aleksandar (Lead / Corresponding author).

    In: Physiological Reports, Vol. 7, No. 3, e13997, 03.02.2019, p. 1-12.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Area under the curve analysis of blood pressure reveals increased spontaneous locomotor activity in SPAK knock-in mice

    T2 - relevance for hypotension induced by SPAK inhibition?

    AU - Burgess, Kieran

    AU - Jovanović, Sofija

    AU - Sudhir, Rajni

    AU - Jovanović, Aleksandar

    N1 - Funding Information: This research was supported by the British Heart Foundation (grant nos. PG/11/106/29235 and PG/15/28/31384).

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    N2 - SPAK (Ste20/SPS1-related proline/alanine-rich kinase) has been recently identified as a protein kinase which targets the electroneutral cation-coupled chloride cotransporters and it stands out as a target for inhibition in novel anti-hypertensive agents. From this prospective, any information about physiological consequences of SPAK inhibition would be useful to better understand the efficacy and potential adverse effects of the SPAK-based anti-hypertensive therapy. Radiotelemetry was employed to continuously measure the parameters of blood pressure (mean arterial blood pressure, systolic blood pressure, and diastolic blood pressure), heart rate, and physical activity in SPAK knock-in (KI) mice and littermate controls for 24 h. For each parameter, the area under the curve (AUC) was calculated and compared between the SPAK KI mice and wild type mice. There was no statistically significant difference in the AUC of blood pressure parameters between SPAK KI and littermate mice. When mice were physically inactive, the AUCs for blood pressures were significantly lower in SPAK KI than in littermates. When physically active, blood pressures were significantly higher in SPAK KI than in littermates. The heart rate followed a similar pattern. The AUC of physical activity was significantly increased in SPAK KI mice when compared to littermates and the SPAK KI mice spent significantly less time in an inactive state and significantly more time in active states. Comparison between SPAK KI mice and unrelated wild type mice yielded similar results to the comparison between SPAK KI mice and littermates. We conclude that SPAK inhibition increases spontaneous locomotor activity, which has a significant effect on blood pressure.

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