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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT00173082
Other study ID # 9461700402
Secondary ID
Status Recruiting
Phase N/A
First received September 12, 2005
Last updated November 28, 2007
Start date June 2005
Est. completion date July 2008

Study information

Verified date November 2007
Source National Taiwan University Hospital
Contact Vin-cent Wu, MD
Phone +886-2-23562082
Email kdw@ha.mc.ntu.edu.tw
Is FDA regulated No
Health authority Taiwan: Department of Health
Study type Observational

Clinical Trial Summary

Primary aldosteronism (PA) is occasionally associated with impaired glucose tolerance. Glucose intolerance, in general metabolic syndrome is caused by suppression of insulin release from the pancreas and suppression of insulin sensitivity of the target tissues. Several studies have suggested that impaired glucose tolerance in primary aldosteronism is due to an inability of the beta cells to release insulin by potassium depletion. It was suggested glucose intolerance in PA is caused by the suppression of insulin release related to hypopotassemia and compensatory increase of insulin sensitivity is observed in PA. The increased insulin secretory capacity associated with correction of negative potassium balance may account for the increase in plasma leptin after curing primary aldosteronism. The conclusion with respect to the possible causal relationship between diabetes mellitus (DM) and PA, however, can be obtained after the evaluation of the effect of surgical /pharmacological treatment of PA.


Description:

Primary aldosteronism (PA) is occasionally associated with impaired glucose tolerance. Glucose intolerance, in general metabolic syndrome is caused by suppression of insulin release from the pancreas and suppression of insulin sensitivity of the target tissues. Several studies have suggested that impaired glucose tolerance in primary aldosteronism is due to an inability of the beta cells to release insulin by potassium depletion. It was suggested glucose intolerance in PA is caused by the suppression of insulin release related to hypopotassemia and compensatory increase of insulin sensitivity is observed in PA. The increased insulin secretory capacity associated with correction of negative potassium balance may account for the increase in plasma leptin after curing primary aldosteronism. The conclusion with respect to the possible causal relationship between DM and PA, however, can be obtained after the evaluation of the effect of surgical /pharmacological treatment of PA. From July 2005 to July 2008, patients with primary aldosteronism, hospitalized for a comprehensive study of the subtypes of primary aldosteronism before operation will receive informed consent about the insulin sensitivity test. In the present study, we measured insulin sensitivity via the ability to release insulin by the 75 g oral glucose tolerance test (OGTT) in PA to clarify the mechanisms of glucose intolerance in PA. Seventy-five gram OGTT was performed in PA before and after adrenalectomy. Within one minute, 75 g of glucose dissolved in 200 cc water was ingested. Venous blood samples were drawn at 0, 60, 120 minutes for determination of plasma glucose and plasma insulin levels. Serum potassium levels were measures at 0 minutes. Furthermore, the adipokines, HOMA, QUICKI, leptin, adiponectin, homocystine, C-reactive protein, proinflammatory cytokine and adhesion molecules were also measured.


Recruitment information / eligibility

Status Recruiting
Enrollment 100
Est. completion date July 2008
Est. primary completion date
Accepts healthy volunteers No
Gender Both
Age group 18 Years to 80 Years
Eligibility Inclusion Criteria:

- Age more than 18 years old

- Aldosteronism patients

Exclusion Criteria:

- Patients with pregnancy

Study Design

Time Perspective: Prospective


Intervention

Procedure:
Glucose tolerance test


Locations

Country Name City State
Taiwan National Taiwan University Hospital Taipei

Sponsors (1)

Lead Sponsor Collaborator
National Taiwan University Hospital

Country where clinical trial is conducted

Taiwan, 

References & Publications (3)

Corry DB, Tuck ML. The effect of aldosterone on glucose metabolism. Curr Hypertens Rep. 2003 Apr;5(2):106-9. Review. — View Citation

Kreze A Sr, Kreze-Spirova E, Mikulecky M. Diabetes mellitus in primary aldosteronism. Bratisl Lek Listy. 2000;101(4):187-90. — View Citation

Widimský J Jr, Strauch B, Sindelka G, Skrha J. Can primary hyperaldosteronism be considered as a specific form of diabetes mellitus? Physiol Res. 2001;50(6):603-7. — View Citation

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