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In order to improve transformation efficiency of phytosterols into 9α-hydroxylation of 4-androstene-3,17-dione (9α-OH-AD) by Mycobacterium sp. LY-1, we studied the strains breeding using atmospheric and room temperature plasma (ARTP) technology and optimized their conversion process. A high production strain named C33 with a good genetic stability was selected and the product molar yield reached to 15.5%, 34.8% higher than that of original strain with 15 g/L phytosterols. Furthermore, the fermentation medium was optimized through the design of orthogonal experiment. Besides, oil-water bidirectional transformation system was set up to improve the 9α-OH-AD molar yield of mutant strain C33. With adding 12 mL soybean oil to each 1 g phytosterols, the molar yield of 9α-OH-AD reached 47.0%, which increased twice than that of control (15.5%).
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ObjectiveTo investigate the characteristics of left ventricular structural damage in patients with primary aldosteronism(PA).MethodsA total of 438 inpatients with hypertension from January 2007 to June 2010 were screened for PA,and diagnosis was made in 213 PA patients and 225 patients with essential hypertension (EH).The left ventricular structure of all subjects was evaluated according to the results of echocardiographic measurements.Results The duration of hypertension and plasma aldosterone level in patients with PA were significantly higher (P＜ 0.01 ),while the serum potassium and plasma renin activity were significantly lower (P＜0.01 ) than those in patients with EH.The interventricular septum thickness,left ventricular end-diastolic dimension,left ventricular mass index (LVMI),left ventricular end-diastolic volume,and stroke volume in patients with PA were significantly higher than those in EH patients( P＜0.01 ) after the duration of hypertension was corrected.In patients with PA,the prevalence of left ventricular hypertrophy (LVH) was higher than that in EH patients ( 53.1％ vs 33.8 ％,x2 =16.57,P ＜ 0.01 ). Normal left ventricular geometry ( NG ),concentric remodeling ( CCR ),concentric hypertrophy( CCH),and eccentric hypertrophy (ECH) were found respectively in 24.9％,22.1％,22.1％,and 30.9％ of patients with PA.Multiple stepwise regression analysis showed that the seated plasma aldosterone level (β=0.43,P ＜ 0.01 ) and systolic blood pressure (β =0.45,P ＜ 0.01 ) were the main factors that influenced LVMI.The course was the main parameter that influenced relative wall thickness(β=0.011,P＜0.05 ).Conclusion The prevalence of LVH is higher in patients with PA than that in EH patients.The eccentric hypertrophy is the most common left ventricular geometrical pattern in patients with PA.
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The clinical data of 330 patients with primary aldosteronism (PA) from January 2006 to March 2010 were retrospectively analyzed. The prevalence of 1, 2, and 3 stage hypertension in these subjects was 3.64％,20. 91％, and 75.45 ％, respectively. Of all PA patients, 89.09％ were young adults and 81.82％ were overweight or obese. There was a marked preponderance of male patients in the overweight or obese group ( P＜0. 01 ). The incidence of hypokalemia was 32. 12％. The concentration of serum potassium was not associated with the disease course. Logistic regression showed that the concentration of plasma aldosterone was an independent risk factor of hypokalemia in PA patients( P＜0. 01 ). 79. 09％ PA patients presented the plasma aldosterone level over 12 ng/dl and the renin activity level of less than 1 ng · ml-1 · h-1. The aldosterone-to-rennin activity ratio was ＞20 in 94.24％ of the patients with PA.
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ObjectiveTo explore the prevalence of metabolic syndrome (MS) in patients with primary aldosteronism(PA) and the correlation with plasma aldosterone concentration. MethodsThe incidence of MS was retrospectively analyzed in 216 patients with PA from October 2008 to July 2010. Results( 1 ) The prevalence of MS was 47. 69％ in the patients with PA. As the individual components of MS, the incidence of overweight/obesity,raised blood triglyceride ( TG ) level, impaired glucose regulation ( IGR), lowered high-density lipoprotein-cholesterol ( HDL-C), and diabetes mellitus( DM ) was 51.13％, 22. 52％, 19.62％, 3.82％, and 2.94％, respectively. (2)The most common combination of MS components was overweight/obesity+high TG, followed by overweight/obesity+ lowered HDL-C, and overweight/obesity + DM, with the incidence of 35. 19％,15.74％, and 11.57％,respectively. (3) The incidence of overweight/obesity and IGR was raised progressively with the increasing plasma aldosterone level. (4) The prevalence of MS was significantly lower in Han patients (45.3％) than in Uygur ( 64. 0％ ), but higher than in Kazakh (42. 9％, both P＜0. 05 ). ConclusionsThe prevalence of MS in patients with PA was high. The prevalences of MS and its components were gradually rising with plasma aldosterone level.
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e extra-adrenal pheochromocytoma.