[The Educational Aspect in Promoting a Low-Sodium Diet, Physical Activity and Therapy Adherence among Patients with Autosomal Dominant Polycystic Disease: A Literature Review].

Background. Polycystic kidney disease (ADPKD) is the most common monogenic cause of End Stage Renal Disease (ESRD), and, thus, of kidney transplantation and dialysis. Educational interventions aimed to improve adherence to therapy, physical performance, and adequate food intake in patients can slow down disease progression by developing self-care skills, which are useful to promote their autonomy while aligning their life plans and required treatments. The aim of this review is to analyze the adherence of patients with polycystic kidney to pharmacological therapy, low-sodium diet, and physical activity, as evidenced in the clinical literature to guide structured educational interventions. Methods. We conducted a literature review from 01/09/2021 to 30/12/2022 through the combination of free keywords and MeSH terms on the databases: PubMed, CINAHL and Cochrane. Results. Findings in medical literature show that physical activity can improve blood pressure control and a low-sodium diet can slow down the progression towards ESRD. Furthermore, although patients may adhere to the complex drug therapy, unresolved educational demands concern choices and behaviors of daily life that, involving the sphere of feelings and emotions, can evolve into manifestations of anxiety and stress. Conclusion. Among ADPKD patients a personalized educational support, considering disease stage and psychological factors, may enable them to acquire knowledge, skills, and behaviors that can improve clinical outcomes.

11C-Radiosynthesis and preliminary human evaluation of the disposition of the ACE inhibitor [11C]zofenoprilat.

(4S)-1-[(S)-3-Mercapto-2-methylpropanoyl]-4-phenylthio-L-proline (Zofenoprilat, 2), the active metabolite of the potent ACE inhibitor Zofenopril Calcium (1), was labelled with carbon-11 (t1/2=20.4 min) to evaluate its pharmacokinetics behaviour in human body using Positron Emission Tomography (PET). [11C]2 labelling procedures were based on the use of immobilized Grignard reagent and the acylation of (S)-4-phenylthio-L-proline methyl ester (5) with 11C-labelled methacryloyl chloride, followed by a Michael addition with thiobenzoic acid. The radiochemical yield was 5-10% (EOB, decay corrected) and specific radioactivity ranged from 0.5 to 1.5 Ci/micromol (18.5-55.5 GBq/micromol). Preliminary in vivo human evaluation of [11C]2 showed that the drug accumulates in organs which express high levels of ACE, like lungs and kidneys, and in organs involved in drug metabolism such as the liver and gall bladder. Results of the distribution of [11C]2 showed a measurable concentration of the drug in the target tissues such as the kidney and to a minor extent, the heart, where it can afford organ protection.

ACE and alpha-adducin polymorphism as markers of individual response to diuretic therapy.

Renin-angiotensin system reactivity and the constitutive capacity of the renal tubule to reabsorb sodium play a role in the individual response to diuretic therapy; therefore we evaluated the blood pressure (BP) response to hydrochlorothiazide in 87 never-treated individuals with mild essential hypertension, according to ACE gene I/D and alpha-adducin Gly460Trp polymorphism. These genotypes where chosen because previous data showed their interaction in determining the BP response to salt probably was the result of their involvement in the activation of the renin-angiotensin system (ACE) and in the constitutive capacity of the kidney to reabsorb sodium (alpha-adducin) (treatment for 2 months). BP was measured after 3 run-in visits and after the first and second months of treatment by means of a standardized procedure. Data were analyzed by ANOVA, t test, and multivariate ANOVA for repeated measures (covarying for gender, age, and body mass index). Although basal mean BP (MBP) was similar in the different ACE and alpha-adducin genotypes, patients carrying at least one I allele of ACE and one 460Trp allele of alpha-adducin had the largest MBP decrease with treatment (12.7+/-1.9 mm Hg), the effect of the combination of genotypes being additive but not epistatic. These patients had an odds ratio of 15.75 of being a responder to hydrochlorothiazide compared with patients with Gly460Gly+DD, with the least MBP decrease (3.4+/-1.7 mm Hg). Alpha-adducin and ACE I/D polymorphism may be useful to predict the interindividual degree of response to hydrochlorothiazide; the analysis of the combination of the 2 genotypes increases the accuracy of the prediction of response to the drug.