Bronchial Challenge Test of Magnesium-treated Asthmatics

Asthma Clinical Trial

Official title:

Metacholine-provocation of Mablet-treated Asthmatics

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01118923
• Other study ID #: 9727d
• Status: Completed
• Phase: N/A
• First received: April 27, 2010
• Last updated: September 3, 2013
• Start date: October 2010
• Est. completion date: March 2013

Study information

• Verified date: September 2013
• Source: University of Aarhus
• Contact: n/a
• Is FDA regulated: No
• Health authority: Denmark: The Regional Committee on Biomedical Research Ethics
• Study type: Interventional

Clinical Trial Summary

The present study is part of a project titled 'Magnesium in asthma and chronic obstructive pulmonary disease'. The hypothesis of the main project is that a daily magnesium supplement will benefit patients with asthma and chronic obstructive pulmonary disease.

The aim of this part of the project is to study the effect of a daily magnesium supplement on the grade of bronchial hyperreactivity in asthmatics.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 12
• Est. completion date: March 2013
• Est. primary completion date: March 2013
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years to 70 Years

Eligibility

Inclusion Criteria:

• Asthma with annual symptoms, bronchial hyperreactivity and positive metacholine-test (PD20<1000 microgram

Exclusion Criteria:

• Se-Mg > 2,00 mmol/L, smoking cessation less than 1 year prior to study start, major changes in eating habits within three months prior to study start and during the study period of approx. one year, various conditions (e.g. gastrointestinal disease, kidney disease, pregnancy/lactation) that may affect the study results.

Study Design

Allocation: Randomized, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Asthma

Intervention

Dietary Supplement:
• Magnesium supplement (magnesium hydroxide/ -oxide)
3 tablets of Mablet (360 mg per tablet) daily for 12 weeks Produced by: Gunnar Kjems APS
• Placebo
3 placebo-tablets daily for 12 weeks

Locations

Country	Name	City	State
Denmark	Research Dept. of Respiratory Medicine, Aarhus University Hospital	Aarhus C

Sponsors (4)

Lead Sponsor	Collaborator
University of Aarhus	Aarhus University Hospital, GCP-unit at Aarhus University Hospital, Aarhus, Denmark, Gunnar Kjems APS

Country where clinical trial is conducted

Denmark, 

References & Publications (13)

Abreu González J, Hernández García C, Abreu González P, Martín García C, Jiménez A. [Effect of intravenous magnesium sulfate on chronic obstructive pulmonary disease exacerbations requiring hospitalization: a randomized placebo-controlled trial]. Arch Bronconeumol. 2006 Aug;42(8):384-7. Spanish. Erratum in: Arch Bronconeumol. 2006 Oct;42(10):491. — View Citation

Alamoudi OS. Hypomagnesaemia in chronic, stable asthmatics: prevalence, correlation with severity and hospitalization. Eur Respir J. 2000 Sep;16(3):427-31. — View Citation

Aziz HS, Blamoun AI, Shubair MK, Ismail MM, DeBari VA, Khan MA. Serum magnesium levels and acute exacerbation of chronic obstructive pulmonary disease: a retrospective study. Ann Clin Lab Sci. 2005 Autumn;35(4):423-7. — View Citation

Beasley R, Aldington S. Magnesium in the treatment of asthma. Curr Opin Allergy Clin Immunol. 2007 Feb;7(1):107-10. Review. — View Citation

Bede O, Surányi A, Pintér K, Szlávik M, Gyurkovits K. Urinary magnesium excretion in asthmatic children receiving magnesium supplementation: a randomized, placebo-controlled, double-blind study. Magnes Res. 2003 Dec;16(4):262-70. — View Citation

Dominguez LJ, Barbagallo M, Di Lorenzo G, Drago A, Scola S, Morici G, Caruso C. Bronchial reactivity and intracellular magnesium: a possible mechanism for the bronchodilating effects of magnesium in asthma. Clin Sci (Lond). 1998 Aug;95(2):137-42. — View Citation

Emelyanov A, Fedoseev G, Barnes PJ. Reduced intracellular magnesium concentrations in asthmatic patients. Eur Respir J. 1999 Jan;13(1):38-40. — View Citation

Fogarty A, Lewis SA, Scrivener SL, Antoniak M, Pacey S, Pringle M, Britton J. Oral magnesium and vitamin C supplements in asthma: a parallel group randomized placebo-controlled trial. Clin Exp Allergy. 2003 Oct;33(10):1355-9. — View Citation

Gontijo-Amaral C, Ribeiro MA, Gontijo LS, Condino-Neto A, Ribeiro JD. Oral magnesium supplementation in asthmatic children: a double-blind randomized placebo-controlled trial. Eur J Clin Nutr. 2007 Jan;61(1):54-60. Epub 2006 Jun 21. — View Citation

Hill J, Micklewright A, Lewis S, Britton J. Investigation of the effect of short-term change in dietary magnesium intake in asthma. Eur Respir J. 1997 Oct;10(10):2225-9. — View Citation

Nasulewicz A, Zimowska W, Bayle D, Dzimira S, Madej J, Rayssiguier Y, Opolski A, Mazur A. Changes in gene expression in the lungs of Mg-deficient mice are related to an inflammatory process. Magnes Res. 2004 Dec;17(4):259-63. — View Citation

Rowe BH, Camargo CA Jr. The role of magnesium sulfate in the acute and chronic management of asthma. Curr Opin Pulm Med. 2008 Jan;14(1):70-6. Review. — View Citation

Schlingmann KP, Konrad M, Seyberth HW. Genetics of hereditary disorders of magnesium homeostasis. Pediatr Nephrol. 2004 Jan;19(1):13-25. Epub 2003 Nov 22. Review. — View Citation

* Note: There are 13 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	PD20 for metacholine	Bronchial hyperreactivity is expressed by the dose of inhaled metacholine necessary to achieve a decline of 20 % in FEV1 (Bronchial challenge test).	Two years	No
Secondary	Impulse Oscillometry for measurement of pulmonary impedance	A characteristic feature of Impulse Oscillometry is that pulmonary impedance is not derived from the respiratory signals but from the pressure-flow relationship of artificial impulse-shaped test signals which are produced by an external generator. The advantage of artificial test signals is the incomparably higher frequency contents with a relatively high consistency as far as frequency range and amplitude are concerned, so that a thorough differentiation of pulmonary function is possible.	Two years	No