Effect of domperidone on ventilation and polycythemia after 5 weeks of chronic hypoxia in rats

J. Gamboa; J. L. Macarlupú; M. Rivera-Chira; C. Monge-C.; F. León-Velarde

doi:10.1016/S1569-9048(03)00065-X

Effect of domperidone on ventilation and polycythemia after 5 weeks of chronic hypoxia in rats

J. Gamboa
, J. L. Macarlupú
, M. Rivera-Chira
, C. Monge-C.
, F. León-Velarde

Universidad Peruana Cayetano Heredia

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Chronically hypoxic humans and some mammals have attenuated ventilatory responses, which have been associated with high dopamine level in carotid bodies. Alveolar hypoventilation and blunted ventilatory response have been recognized to be at the basis of Chronic Mountain Sickness by generating arterial hypoxemia and polycythemia. To investigate whether dopamine antagonism could decrease the hemoglobin concentration by stimulating resting ventilation (V̇E) and/or hypoxic ventilatory response, 18 chronically hypoxic rats (5 weeks, PB=433 Torr) were studied with and without domperidone treatment (a peripheral dopamine antagonist). Acute and prolonged treatment significantly increased poikilocapnic ventilatory response to hypoxia (RV̇E ml/min/kg=V̇E at 0.1 FI_O2-V̇E at 0.21 FI_O2), from 506±36 to 697±48; and from 394±37 to 660±81, respectively. In addition, Domperidone treatment decreased hemoglobin concentration from 21.6±0.29 to 18.9±0.19 (P<0.01) in rats chronically exposed to hypobaric hypoxia. Our study suggests that the stimulant effect of D₂-R blockade on ventilatory response to hypoxia seems to compensate the low hypoxic peripheral chemosensitivity after chronic exposure and the latter in turn decrease hemoglobin concentration.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Respiratory Physiology and Neurobiology
Volume	135
Issue number	1
DOIs	https://doi.org/10.1016/S1569-9048(03)00065-X
State	Published - 15 Apr 2003

Keywords

Control of breathing
Hemoglobinpolycythemia
Hypoxiadopamine receptors
Hypoxic ventilatory response
Mammalsrat
Pharmacological agentsdomperidone
Receptorsdopamine

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title = "Effect of domperidone on ventilation and polycythemia after 5 weeks of chronic hypoxia in rats",

abstract = "Chronically hypoxic humans and some mammals have attenuated ventilatory responses, which have been associated with high dopamine level in carotid bodies. Alveolar hypoventilation and blunted ventilatory response have been recognized to be at the basis of Chronic Mountain Sickness by generating arterial hypoxemia and polycythemia. To investigate whether dopamine antagonism could decrease the hemoglobin concentration by stimulating resting ventilation ({\.V}E) and/or hypoxic ventilatory response, 18 chronically hypoxic rats (5 weeks, PB=433 Torr) were studied with and without domperidone treatment (a peripheral dopamine antagonist). Acute and prolonged treatment significantly increased poikilocapnic ventilatory response to hypoxia (R{\.V}E ml/min/kg={\.V}E at 0.1 FIO2-{\.V}E at 0.21 FIO2), from 506±36 to 697±48; and from 394±37 to 660±81, respectively. In addition, Domperidone treatment decreased hemoglobin concentration from 21.6±0.29 to 18.9±0.19 (P<0.01) in rats chronically exposed to hypobaric hypoxia. Our study suggests that the stimulant effect of D2-R blockade on ventilatory response to hypoxia seems to compensate the low hypoxic peripheral chemosensitivity after chronic exposure and the latter in turn decrease hemoglobin concentration.",

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AU - Gamboa, J.

AU - Macarlupú, J. L.

AU - Rivera-Chira, M.

AU - Monge-C., C.

AU - León-Velarde, F.

PY - 2003/4/15

Y1 - 2003/4/15

N2 - Chronically hypoxic humans and some mammals have attenuated ventilatory responses, which have been associated with high dopamine level in carotid bodies. Alveolar hypoventilation and blunted ventilatory response have been recognized to be at the basis of Chronic Mountain Sickness by generating arterial hypoxemia and polycythemia. To investigate whether dopamine antagonism could decrease the hemoglobin concentration by stimulating resting ventilation (V̇E) and/or hypoxic ventilatory response, 18 chronically hypoxic rats (5 weeks, PB=433 Torr) were studied with and without domperidone treatment (a peripheral dopamine antagonist). Acute and prolonged treatment significantly increased poikilocapnic ventilatory response to hypoxia (RV̇E ml/min/kg=V̇E at 0.1 FIO2-V̇E at 0.21 FIO2), from 506±36 to 697±48; and from 394±37 to 660±81, respectively. In addition, Domperidone treatment decreased hemoglobin concentration from 21.6±0.29 to 18.9±0.19 (P<0.01) in rats chronically exposed to hypobaric hypoxia. Our study suggests that the stimulant effect of D2-R blockade on ventilatory response to hypoxia seems to compensate the low hypoxic peripheral chemosensitivity after chronic exposure and the latter in turn decrease hemoglobin concentration.

AB - Chronically hypoxic humans and some mammals have attenuated ventilatory responses, which have been associated with high dopamine level in carotid bodies. Alveolar hypoventilation and blunted ventilatory response have been recognized to be at the basis of Chronic Mountain Sickness by generating arterial hypoxemia and polycythemia. To investigate whether dopamine antagonism could decrease the hemoglobin concentration by stimulating resting ventilation (V̇E) and/or hypoxic ventilatory response, 18 chronically hypoxic rats (5 weeks, PB=433 Torr) were studied with and without domperidone treatment (a peripheral dopamine antagonist). Acute and prolonged treatment significantly increased poikilocapnic ventilatory response to hypoxia (RV̇E ml/min/kg=V̇E at 0.1 FIO2-V̇E at 0.21 FIO2), from 506±36 to 697±48; and from 394±37 to 660±81, respectively. In addition, Domperidone treatment decreased hemoglobin concentration from 21.6±0.29 to 18.9±0.19 (P<0.01) in rats chronically exposed to hypobaric hypoxia. Our study suggests that the stimulant effect of D2-R blockade on ventilatory response to hypoxia seems to compensate the low hypoxic peripheral chemosensitivity after chronic exposure and the latter in turn decrease hemoglobin concentration.

KW - Control of breathing

KW - Hemoglobinpolycythemia

KW - Hypoxiadopamine receptors

KW - Hypoxic ventilatory response

KW - Mammalsrat

KW - Pharmacological agentsdomperidone

KW - Receptorsdopamine

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AN - SCOPUS:0037447243

SN - 1569-9048

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JO - Respiratory Physiology and Neurobiology

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IS - 1

ER -

Effect of domperidone on ventilation and polycythemia after 5 weeks of chronic hypoxia in rats

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