Using the CYP3A Activity Evaluation to Predict the Efficacy and Safety of Diazepam in Patients With Alcohol Withdrawal Syndrome

2021 ◽  
pp. 089719002199700
Author(s):  
Valentin Yu. Skryabin ◽  
Mikhail S. Zastrozhin ◽  
Elena A. Grishina ◽  
Kristina A. Ryzhikova ◽  
Valery V. Shipitsyn ◽  
...  

Background:Diazepam is one of the most commonly prescribed tranquilizers for the therapy of alcohol withdrawal syndrome (AWS). Despite its popularity, there is currently no precise information on the effect of genetic polymorphisms on the efficacy and safety of diazepam therapy.Objective:The objective of our study was to study the effect of CYP3A isoenzymes activity on the efficacy and safety of diazepam in patients with AWS.Methods:The study was conducted on 30 Russian male patients suffering from the AWS who received diazepam in injections at a dosage of 30.0 mg / day for 5 days. The efficacy and safety assessment was performed using psychometric scales and scales for assessing the severity of adverse drug reactions.Results:Based on the results of the study, we revealed the differences in the efficacy of therapy in patients with different CYP3A4 C>T intron 6 ( rs35599367) genotypes: ( CC) −9.0 [−13.0; −5.0], ( CT+TT) −13.5 [−15.0; −10.0], p = 0.014. The scores on the UKU scale, which was used to evaluate the safety of therapy, were also different: ( CC) 7.5 [6.0; 11.0], ( CT+TT) 11.0 [8.0; 12.0], p = 0.003.Conclusion:Possible relationship between the CYP3A activity, evaluated by the content of the urinary endogenous substrate of the given isoenzyme and its metabolite, the 6-beta-hydroxy cortisol (6-β-HC) / cortisol ratio, and the efficacy of diazepam was demonstrated. This possible relationship was also supported by the genotyping results. This should be taken into consideration when prescribing this drug to such patients in order to reduce the risk of pharmacoresistance.

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Valentin Yu Skryabin ◽  
Mikhail S. Zastrozhin ◽  
Marco V. Torrado ◽  
Elena A. Grishina ◽  
Kristina A. Ryzhikova ◽  
...  

Abstract Background Diazepam is one of the most commonly prescribed tranquilizers for therapy of alcohol withdrawal syndrome (AWS). Despite its popularity, there is currently no precise information on the effect of genetic polymorphisms on its efficacy and safety. The objective of our study was to investigate the effect of CYP2C19*2 and CYP2C19*17 genetic polymorphisms on the efficacy and safety of diazepam in patients with AWS. Methods The study was conducted on 30 Russian male patients suffering from the AWS who received diazepam in injections at a dosage of 30.0 mg/day for 5 days. The efficacy and safety assessment was performed using psychometric scales and scales for assessing the severity of adverse drug reactions. Results Based on the results of the study, we revealed the differences in the efficacy of therapy in patients with different CYP2C19 681G>A (CYP2C19*2, rs4244285) genotypes: (CYP2C19*1/*1) −8.5 [−15.0; −5.0], (CYP2C19*1/*2 and CYP2C19*2/*2) −12.0 [−13.0; −9.0], p = 0.021. The UKU scale scores, which were used to evaluate the safety of therapy, were also different: (CYP2C19*1/*1) 7.0 [6.0; 12.0], (CYP2C19*1/*2 and CYP2C19*2/*2) 9.5 [8.0; 11.0], p = 0.009. Patients carrying different CYP2C19 –806C>T (CYP2C19*17, rs12248560) genotypes also demonstrated differences in therapy efficacy and safety rates. Conclusions Thus, the effects of CYP2C19*2 and CYP2C19*17 genetic polymorphisms on the efficacy of diazepam were demonstrated.


2021 ◽  
Vol 1 (1) ◽  
pp. 84-92
Author(s):  
V. Yu. Skryabin ◽  
M. S. Zastrozhin ◽  
E. A. Grishina ◽  
K. A. Ryzhikova ◽  
V. V. Shipitsyn ◽  
...  

Diazepam is one of the most widely prescribed tranquilizers for the therapy of alcohol withdrawal syndrome (AWS). However, diazepam therapy often turns out to be ineffective, and some patients experience dose-dependent adverse drug reactions. Previous studies have shown that the metabolism of diazepam involves the CYP2C19 isoenzyme, whose activity is highly dependent on polymorphism of the encoding gene. The objective of our study was to investigate the effects of CYP2C19*2 genetic polymorphisms on plasma and saliva concentrations of diazepam as well as its impact on the efficacy and safety rates of therapy in patients with AWS. The study was conducted on 100 Russian male patients with AWS who received diazepam in injections at a dosage of 30.0 mg/day for 5 days. Genotyping was performed by real-time polymerase chain reaction. The efficacy and safety assessment was performed using psychometric scales. We revealed differences in the efficacy and safety of therapy in patients with different CYP2C19 681G>A genotypes. Therapeutic drug monitoring (TDM) revealed the statistically significant differences in the levels of diazepam plasma concentration: (GG) 199.83 [82.92; 250.58] vs (GA+AA) 313.47 [288.99; 468.33], p=0.040, and diazepam saliva concentration: (GG) 2.80 [0.73; 3.80] vs (GA+AA) 5.33 [5.14; 6.00], p=0.003).


Author(s):  
М.С. Застрожин ◽  
А.С. Сорокин ◽  
Т.В. Агибалова ◽  
И.А. Бедина ◽  
Е.А. Гришина ◽  
...  

Введение: Имплементация систем поддержки принятия решений, способных формировать рекомендации по выбору лекарствен- ного средства и его дозы в соответствии с результатами фармакогенетического тестирования, является актуальной задачей, так как решение ее позволит повысить эффективность терапии и снизить риск развития нежелательных лекарственных реакций.Материалы и методы: В исследовании принимал участие 51 пациент (21 - основная группа, получавшая назначения в соответ- ствии с рекомендациями, основанными на результатах фармакогенетического тестирования, а 30 - группа сравнения, получавшая назначения без них) мужского пола с синдромом отмены алкоголя. Для оценки эффективности и безопасности терапии синдрома отмены алкоголя, которую осуществляли с использованием бензодиазепинового транквилизатора феназепама (бромдигидрохлор- фенилбензодиазепина), а также стандартной дезинтоксикационной и витаминотерапии, применялись международные психоме- трические шкалы и шкалы оценки выраженности нежелательных реакций. Определение полиморфизмов генов CYP2D6*4 (1846G>A, rs3892097), CYP2C19*2 (681G>A, rs4244285), CYP2C19*3 (636G>A, rs4986893), CYP2C19*17 (-806C>T, rs12248560), CYP3A5*3 (6986A>G, rs776746) и ABCB1*6 (3435C>T, rs1045642) осуществлялось методом полимеразной цепной реакции в реальном времени с аллель-специфиче- ской гибридизацией. Интерпретацию результатов фармакогенетического тестирования осуществляли с использованием свободно распространяемого программного обеспечения PharmacoGenomeX2 (www.pgx2.com).Результаты: Получены статистически значимые различия в количестве баллов по всем психометрическим шкалам у пациентов основной группы и группы сравнения. Например, по шкале оценки тяжести синдрома отмены алкоголя к 3-му дню исследования количество баллов в основной группе составляло 13,5 [11,2; 16,0], а в группе контроля - 18,0 [17,0; 22,0] (p < 0,001); к 5-му в основ- ной группе - 6,5 [4,2; 8,0], в группе контроля - 15,0 [14,0; 16,0] (p < 0,001). По шкале безопасности UKU также была получена стати- стически значимая разница. К 3-му дню исследования количество баллов по шкале UKU в основной группе составило 6,0 [5,0; 7,0], а в группе контроля - 7,0 [6,0; 8,0] (p = 0,030); к 5-му дню разница возрастала. В основной группе - 5,5 [3,0; 9,0], в группе контроля - 14,0 [12,0; 19,0] (p < 0,001). Группы были репрезентативны (при включении в исследование разница в количестве баллов отсутствовала). Выводы: Персонализация дозы лекарств в соответствии с фармакогенетическими алгоритмами у пациентов с синдромом отмены алкоголя, способна снизить риск развития нежелательных реакций и фармакорезистентности, что позволяет рекомендовать исполь- зование фармакогенетических систем поддержки принятия решений для подбора дозы лекарств. Introduction: Implementation of the clinical decision support systems capable of forming the recommendations on drug and dose selec- tion according to the results of pharmacogenetic testing is an urgent task. Fulfillment of this task will allow increasing the efficacy of ther- apy and decreasing the risk of undesirable side effects.Materials and methods: The study involved 51 patients (21 - the main group receiving appointments in accordance with the recommenda- tions based on the results of pharamogenetic testing, and 30 - the comparison control group receiving appointments without them) male with alcohol withdrawal syndrome. In order to assess the effectiveness and safety of alcohol withdrawal syndrome, which was performed with the benzodiazepine tranquilizer of phenazepam (bromodihydrochlorophenylbenzodiazepine), as well as standard detoxification and vitamin therapy, international psychometric scales and scales of assessment in expressions of adverse reactions. Genotyping Determination of genetic polymorphisms CYP2D6*4 (1846G>A, rs3892097), CYP2C19*2 (681G>A, rs4244285), CYP2C19*3 (636G>A, rs4986893), CYP2C19*17 (-806C>T, rs12248560), CYP3A5*3 (6986A>G, rs776746) and ABCB1*6 (3435C>T, rs1045642) were realized using real-time polymerase chain reaction with allele specific hybridization. Interpretation of the results of pharmacogenetic testing was carried out with the help of free soft- ware PharmacoGenomeX2 (www.pgx2.com)Results: Statistically significant differences in the number of scores for all psychometric scales in the patients of the main group and the comparison group were obtained. For example, on the scale of assessing the severity of alcohol withdrawal syndrome by the 3rd day of the study, the score in the main group was 13.5 [11.2; 16,0], and in the control group - 18,0 [17,0; 22.0] (p <0.001); to the 5th in the main group - 6.5 [4.2; 8.0], in the control group - 15.0 [14.0; 16.0] (p <0.001). On the UKU security scale, a statistically significant difference was also obtained. By the 3rd day of the study, the UKU score in the main group was 6.0 [5.0; 7,0], and in the control group - 7,0 [6,0; 8.0] (p = 0.030); by the 5th day the difference increased. In the main group, 5.5 [3.0; 9.0], in the control group - 14.0 [12.0; 19.0] (p <0.001). The groups were representative (when included in the study, the difference in the number of points was absent).Conclusion: Personalization of the dose of drugs in accordance with pharmacogenetic algorithms in patients with alcohol withdrawal syn- drome, can reduce the risk of unwanted reactions and pharmacoresistance, which allows to recommend the use of pharmacogenetic deci- sion support systems for drug dosage selection.


2012 ◽  
Vol 47 (2) ◽  
pp. 149-155 ◽  
Author(s):  
Anna Förg ◽  
Jakob Hein ◽  
Katharina Volkmar ◽  
Martin Winter ◽  
Christoph Richter ◽  
...  

2020 ◽  
pp. 001857872093175
Author(s):  
Valentin Yurievich Skryabin ◽  
Mikhail Zastrozhin ◽  
Marco Torrado ◽  
Elena Grishina ◽  
Kristina Ryzhikova ◽  
...  

Background: Diazepam is one of the most widely prescribed tranquilizers for the therapy of alcohol withdrawal syndrome (AWS), which includes the symptoms of anxiety, fear, and emotional tension. However, diazepam therapy often turns out to be ineffective, and some patients experience dose-dependent adverse drug reactions, reducing the efficacy of therapy. Aim: The purpose of our study was to investigate the effects of CYP2C19*17 genetic polymorphisms on the steady-state concentration of diazepam in patients with AWS. Materials and Methods: The study was conducted on 50 Russian male patients suffering from the AWS. For the therapy of psychomotor agitation, anxiety, fear, and emotional tension, patients received diazepam in injections at a dosage of 30.0 mg/day for 5 days. Genotyping was performed by real-time polymerase chain reaction. The efficacy and safety assessment was performed using psychometric scales and scales for assessing the severity of adverse drug reactions. Therapeutic drug monitoring (TDM) was performed using the high-performance liquid chromatography-mass spectrometry (HPLC-MS/MS) method. Results: Based on the results of the study, we revealed the differences in the efficacy of therapy in patients with different CYP2C19 − 806C>T genotypes: (*1/*1) −12.0 [−15.0; −8.0], (*1/*17+*17/*17) −7.0 [−14.0; −5.0], P < .001, as well as the results of TDM: ( CC) 250.70 [213.34; 308.53] ng/mL (*1/*17+*17/*17) 89.12 [53.26; 178.07] ng/mL, P < .001. Conclusion: Thus, our study enrolling 50 patients with AWS, showed the effects of CYP2C19*17 genetic polymorphisms on the efficacy and safety rates of diazepam. Furthermore, we revealed the statistically significant difference in the levels of plasma steady-state concentrations of diazepam in patients carrying different genotypes.


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