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Fulltext Involvement of cytochromes p450 in drug-drug interactions: an overview

Ong CE, Teh LK, Ismail R

Med J Malaysia, 2002 Jun;57(2):251-60.
PMID: 24326665

Drug interactions can cause iatrogenic disease. If concurrent medications are taken, the potential exists for a drug interaction to occur. Renewed interest in the topic interactions has been generated by the fatal interactions involving non-sedating histamine H-1 antagonists and the recent intriduction of two therapeutic agents, the selective serotonin reuptake inhibitors (SSRIs) and HIV protease inhibitors, for the treatment of depression and AIDS, respectively. These three therapeutic agents have been implicated in clinically significant drug interactions. The consequences of these interactions vary in clinical significance, extent, and effect. Some interactions are theoretical whereas others may lead to severe iatrogenic adverse experiences including lethal consequences.The purpose of this review is to alert the medical practioner to potential drug interactions that may occur when these drugs are prescribed to patients. The pharmacological basis and clinical signficance of these interactions are reviewed. The pharmacological mechanisms underlying these interactions are illustrative of those that may be involved for many other medications. Doctors should be aware of the potential pitfall that may occur when certain groups of drugs are prescribed with concurrent medications.

Matched MeSH terms: Serotonin Uptake Inhibitors*
Understanding the Pathophysiology of Premature Ejaculation: Bridging the Link between Pharmacological and Psychological Interventions

Yusof F, Sidi H, Das S, Midin M, Kumar J, Hatta MH

Curr Drug Targets, 2018;19(8):856-864.
PMID: 27993112 DOI: 10.2174/1389450117666161215161108

Premature ejaculation (PE) is one of the commonest male sexual dysfunctions. It is characterized by ejaculation which occurs before or soon after vaginal penetration, which causes significant psychological distress to the individual, and his partner. The exact cause of PE is still unknown but several mechanisms are proposed, and these involve complex interactions of neurophysiological, psychosocial, and cognitive factors. We discuss the role of serotonin, nitric oxide, phosphodiesterase enzymes and other neurotransmitters. Treatment of PE tends to co-occur with other sexual difficulties, especially erectile dysfunction (ED). Treatment with selective serotonin reuptake inhibitors (SSRIs) and Dapoxitene are also discussed in detail. The treatment strategy requires a comprehensive holistic approach incorporating both combination of psychopharmacological agent and cognitive-behavioral therapy (CBT). The present review highlights the integration of the hypothalamic-neural and reverberating emotional circuit and discusses the etiology and treatment for patients with PE.

Matched MeSH terms: Serotonin Uptake Inhibitors/administration & dosage; Serotonin Uptake Inhibitors/pharmacology
Fulltext Prenatal exposure to serotonin reuptake inhibitors and congenital heart anomalies: an exploratory pharmacogenetics study

Daud ANA, Bergman JEH, Kerstjens-Frederikse WS, van der Vlies P, Hak E, Berger RMF, et al.

Pharmacogenomics, 2017 Jul;18(10):987-1001.
PMID: 28639488 DOI: 10.2217/pgs-2017-0036

AIM: To explore the role of pharmacogenetics in determining the risk of congenital heart anomalies (CHA) with prenatal use of serotonin reuptake inhibitors.
METHODS: We included 33 case-mother dyads and 2 mother-only (child deceased) cases of CHA in a case-only study. Ten genes important in determining fetal exposure to serotonin reuptake inhibitors were examined: CYP1A2, CYP2C9, CYP2C19, CYP2D6, ABCB1, SLC6A4, HTR1A, HTR1B, HTR2A and HTR3B.
RESULTS: Among the exposed cases, polymorphisms that tended to be associated with an increased risk of CHA were SLC6A4 5-HTTLPR and 5-HTTVNTR, HTR1A rs1364043, HTR1B rs6296 and rs6298 and HTR3B rs1176744, but none reached statistical significance due to our limited sample sizes.
CONCLUSION: We identified several polymorphisms that might potentially affect the risk of CHA among exposed fetuses, which warrants further investigation.

Matched MeSH terms: Serotonin Uptake Inhibitors/adverse effects*; Serotonin Uptake Inhibitors/pharmacokinetics; Serotonin Uptake Inhibitors/therapeutic use
Fulltext Treatments for Anxiety Disorders in Malaysia

Khaiyom JHA, Mukhtar F, Po OT

Malays J Med Sci, 2019 May;26(3):24-36.
PMID: 31303848 MyJurnal DOI: 10.21315/mjms2019.26.3.2

This current study aims to systematically review the treatments for anxiety disorders in Malaysia. PsycINFO, MEDLINE databases, and 28 local journals were used to search published papers in this area. Eight articles were subjected to review after excluding 273 papers that did not meet the inclusion criteria. A total of 598 participants with various types of anxiety disorders were included in the review. Based on the findings, the combination of pharmacotherapy and psychotherapy provided better treatment outcomes if compared to psychotherapy or pharmacotherapy alone. The combination of selective serotonin reuptake inhibitors and cognitive behaviour therapy was considered as one of the most effective treatment to treat patients with anxiety disorders in Malaysia. This is in line with the clinical practice guidelines from the Ministry of Health Singapore and Canada. Even though there were some limitations in the methodology and reporting of the results, it can be concluded that efforts have been taken to conduct studies related to treatments for patients with anxiety disorders in Malaysia. Future studies are suggested to make conscious efforts to overcome these limitations.

Matched MeSH terms: Serotonin Uptake Inhibitors
Effect of fluoxetine on maximal electroshock seizures in mice: acute vs chronic administration

Raju SS, Noor AR, Gurthu S, Giriyappanavar CR, Acharya SB, Low HC, et al.

Pharmacol Res, 1999 Jun;39(6):451-4.
PMID: 10373242

There are no definite reports regarding the effects of chronic fluoxetine on animal models of epilepsy. Since chronically administered fluoxetine, in comparison to acutely administered fluoxetine has different effects on CNS, the present study was undertaken to investigate the effect of acute and chronic fluoxetine pretreatment, on a median anticonvulsant dose (ED50) of phenytoin in male ICR albino mice. Additionally, the effects of fluoxetine pretreatment on median convulsive current (CC50) in the presence and absence of phenytoin were investigated and results were compared. The maximal electroshock seizure (MES) test was used to estimate the ED50of phenytoin. The electroshock threshold test was used to estimate CC50. ED50and CC50values were calculated by probit analysis. The effects of the chronic and acute fluoxetine groups on the ED50of phenytoin were significantly different (P<0.05), and on CC50this difference was not statistically significant. Chronic fluoxetine insignificantly increased the ED50of phenytoin and decreased the CC50while acute fluoxetine decreased the ED50of phenytoin and increased the CC50. Our results indicate that chronic fluoxetine does not have an antiepileptic property and it may have dubious proconvulsant properties, contrary to acute fluoxetine.

Matched MeSH terms: Serotonin Uptake Inhibitors/pharmacology*
Fulltext Comparison of Fluvoxamine alone, Fluvoxamine and cognitive psychotherapy and psychotherapy alone in the treatment of panic disorder in Kelantan--implications for management by family doctors

Azhar MZ

Med J Malaysia, 2000 Dec;55(4):402-8.
PMID: 11221150

This paper reports the result of a brief therapy attempt at treating panic in a busy outpatient psychiatric clinic. The patients were cases of panic referred from the various outpatient clinics within the hospital complex. The patients were divided into three groups at random using one of three modalities of treatment, i.e. cognitive behaviour therapy (CBT), CBT and Fluvoxamine (FVX), and FVX alone. The therapy was aimed for a maximum of nine sessions after which the patients were to be discharged. There were 14 patients in each group. The results show that all the groups were similar in the severity and scores pre treatment but after the different types of treatment there was a significant difference among them. The FVX alone group, showed significant improvement from the pretreatment levels but did not show as much improvement as the other groups and the mean score was only 9.07 after nine sessions. The best group was the CBT in combination with FVX. This indicates that the best way to treat panic is to combine drug treatment and psychological treatment. It is also shown from the study that the combination group requires less FVX than the FVX alone group. This finding has implications for the treatment of panic at the family physician clinic.

Study site: Psychiatric clinic, Hospital Universiti Sains Malaysia

Matched MeSH terms: Serotonin Uptake Inhibitors/therapeutic use*
Transcriptome composition of the preoptic area in mid-age and escitalopram treatment in male mice

Moriya S, Soga T, Wong DW, Parhar IS

Neurosci Lett, 2016 May 27;622:67-71.
PMID: 27113202 DOI: 10.1016/j.neulet.2016.04.052

The decrease in serotonergic neurotransmission during aging can increase the risk of neuropsychiatric diseases such as depression in elderly population and decline the reproductive system. Therefore, it is important to understand the age-associated molecular mechanisms of brain aging. In this study, the effect of aging and chronic escitalopram (antidepressant) treatment to admit mice was investigated by comparing transcriptomes in the preoptic area (POA) which is a key nucleus for reproduction. In the mid-aged brain, the immune system-related genes were increased and hormone response-related genes were decreased. In the escitalopram treated brains, transcription-, granule cell proliferation- and vasoconstriction-related genes were increased and olfactory receptors were decreased. Since homeostasis and neuroprotection-related genes were altered in both of mid-age and escitalopram treatment, these genes could be important for serotonin related physiologies in the POA.

Matched MeSH terms: Serotonin Uptake Inhibitors/pharmacology*
Fulltext A wavelet-based technique to predict treatment outcome for Major Depressive Disorder

Mumtaz W, Xia L, Mohd Yasin MA, Azhar Ali SS, Malik AS

PLoS One, 2017;12(2):e0171409.
PMID: 28152063 DOI: 10.1371/journal.pone.0171409

Treatment management for Major Depressive Disorder (MDD) has been challenging. However, electroencephalogram (EEG)-based predictions of antidepressant's treatment outcome may help during antidepressant's selection and ultimately improve the quality of life for MDD patients. In this study, a machine learning (ML) method involving pretreatment EEG data was proposed to perform such predictions for Selective Serotonin Reuptake Inhibitor (SSRIs). For this purpose, the acquisition of experimental data involved 34 MDD patients and 30 healthy controls. Consequently, a feature matrix was constructed involving time-frequency decomposition of EEG data based on wavelet transform (WT) analysis, termed as EEG data matrix. However, the resultant EEG data matrix had high dimensionality. Therefore, dimension reduction was performed based on a rank-based feature selection method according to a criterion, i.e., receiver operating characteristic (ROC). As a result, the most significant features were identified and further be utilized during the training and testing of a classification model, i.e., the logistic regression (LR) classifier. Finally, the LR model was validated with 100 iterations of 10-fold cross-validation (10-CV). The classification results were compared with short-time Fourier transform (STFT) analysis, and empirical mode decompositions (EMD). The wavelet features extracted from frontal and temporal EEG data were found statistically significant. In comparison with other time-frequency approaches such as the STFT and EMD, the WT analysis has shown highest classification accuracy, i.e., accuracy = 87.5%, sensitivity = 95%, and specificity = 80%. In conclusion, significant wavelet coefficients extracted from frontal and temporal pre-treatment EEG data involving delta and theta frequency bands may predict antidepressant's treatment outcome for the MDD patients.

Matched MeSH terms: Serotonin Uptake Inhibitors/therapeutic use
Serotonergic receptor gene polymorphism and response to selective serotonin reuptake inhibitors in ethnic Malay patients with first episode of major depressive disorder

Badamasi IM, Lye MS, Ibrahim N, Abdul Razaq NA, Ling KH, Stanslas J

Pharmacogenomics J, 2021 Aug;21(4):498-509.
PMID: 33731884 DOI: 10.1038/s41397-021-00228-6

The polymorphisms of the 5HTR1A and 5HTR2A receptor genes (rs6295C/G and rs6311G/A) have been evaluated for association with SSRI treatment outcome in various populations with different results. The present study was carried out to determine the association between genotypes of HTR1A-rs6295 and HTR2A-rs6311 with SSRI treatment outcome among the ethnic Malay patients diagnosed with first-episode major depressive disorder (MDD). The patients were recruited from four tertiary hospitals in the Klang Valley region of Malaysia. Predefined efficacy phenotypes based on 25% (partial early response) and 50% (clinical efficacy response) reduction in Montgomery Asberg Depression Rating Scale-self Rated score (MADRS-S) were adopted for assessment of treatment efficacy in this study. Self-reporting for adverse effects (AE) was documented using the Patient Rated Inventory of Side Effect (PRISE) after treatment with SSRI for up to 6 weeks. Adjusted binary logistic regression between genotypes of the polymorphism obtained using sequencing technique with the treatment outcome phenotypes was performed. The 142 patients recruited were made up of 96 females (67.6%) and 46 males (32.4%). Clinical efficacy and Partial early response phenotypes were not significantly associated with genotypes of HTR1A and HTR2A polymorphism. The GG genotype of HTR2A polymorphism has decreased odds for dizziness (CNS) and increased odds for poor concentration. The GA genotype increases the odd for excessive sweating, diarrhoea, constipation and blurred vision. The CC genotype of HTR1A-rs6295 decreases the odd for nausea/vomiting and increases the odd for anxiety. Thus, some genotypes of HTR1A and HTR2A polymorphism were associated with SSRI treatment outcomes in ethnic Malay MDD patients.

Matched MeSH terms: Serotonin Uptake Inhibitors/therapeutic use*
Female sexual dysfunction in patients with major depressive disorder (MDD) treated with selective serotonin reuptake inhibitor (SSRI) and its association with serotonin 2A-1438 G/A single nucleotide polymorphisms

Masiran R, Sidi H, Mohamed Z, Mohd Nazree NE, Nik Jaafar NR, Midin M, et al.

J Sex Med, 2014 Apr;11(4):1047-1055.
PMID: 24533444 DOI: 10.1111/jsm.12452

INTRODUCTION: Selective serotonin reuptake inhibitors (SSRIs) are known for their sexual side effects. Different SSRIs may affect different areas of sexual function at different rates.
AIMS: The study aimed to determine the prevalence of female sexual dysfunction (FSD), its clinical correlates, and association with 5HT2A (rs6311) single nucleotide polymorphisms (SNPs) in patients with major depressive disorder (MDD) who were on SSRI therapy.
METHODS: This was a cross-sectional study on 95 female outpatients with MDD treated with SSRI. The patients were in remission as determined by Montgomery-Asberg Depression Rating Scale. Genomic DNA was isolated from buccal swabs and samples were processed using a real time polymerase chain reaction.
MAIN OUTCOME MEASURES: The presence or absence of FSD as measured by the Malay Version of Female Sexual Function Index and 5HT2A-1438 G/A (rs6311) SNP.
RESULTS: The overall prevalence of FSD was 32.6%. After controlling for age, number of children, education level, total monthly income, SSRI types, and SSRI dosing, being employed significantly enhanced FSD by 4.5 times (odds ratio [OR] = 4.51; 95% confidence interval [CI] 1.00, 20.30; P = 0.05). Those having marital problems were 6.7 times more likely to have FSD (OR = 6.67; 95% CI 1.57, 28.34). 5HT2A-1438 G/A (rs6311) SNP was not significantly associated with FSD.
CONCLUSION: There was no significant association between FSD and the 5HT2A (rs6311) SNP in patients with MDD on SSRI therapy. Employment status and marital state were significantly associated with FSD among these patients.
Study site: Psychiatry clinics, Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM), University Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia

Matched MeSH terms: Serotonin Uptake Inhibitors/adverse effects; Serotonin Uptake Inhibitors/therapeutic use*
Female sexual dysfunction in patients treated with antidepressant-comparison between escitalopram and fluoxetine

Sidi H, Asmidar D, Hod R, Guan NC

J Sex Med, 2012 May;9(5):1392-9.
PMID: 21477024 DOI: 10.1111/j.1743-6109.2011.02256.x

Selective serotonin reuptake inhibitor is one of the most widely used antidepressant and commonly associated with female sexual dysfunction (FSD).

Matched MeSH terms: Serotonin Uptake Inhibitors/adverse effects*; Serotonin Uptake Inhibitors/therapeutic use
Effects of Selective Serotonin Reuptake Inhibitors (SSRIs) therapy on the female sexual response cycle of women with major depression

Hatta S, Duni A, Ng CG, Lin N, Marhani M, Das S, et al.

Clin Ter, 2013;164(1):11-5.
PMID: 23455735 DOI: 10.7417/T.2013.1503

Depression and its treatment may influence all aspects of the female sexual function from desire to sexual satisfaction. This study aimed to examine the components of the female sexual response cycle (SRC) of women with major depression treated with Selective Serotonin Reuptake Inhibitors.

Matched MeSH terms: Serotonin Uptake Inhibitors/pharmacology; Serotonin Uptake Inhibitors/therapeutic use*
Fulltext Biphasic Effects of α-Asarone on Immobility in the Tail Suspension Test: Evidence for the Involvement of the Noradrenergic and Serotonergic Systems in Its Antidepressant-Like Activity

Chellian R, Pandy V, Mohamed Z

Front Pharmacol, 2016;7:72.
PMID: 27065863 DOI: 10.3389/fphar.2016.00072

Alpha (α)-asarone is one of the main psychoactive compounds, present in Acorus species. Evidence suggests that the α-asarone possess an antidepressant-like activity in mice. However, the exact dose-dependent effect of α-asarone and mechanism(s) involved in the antidepressant-like activity are not clear. The present study aimed to investigate the dose-dependent effect of α-asarone and the underlining mechanism(s) involved in the antidepressant-like activity of α-asarone in the mouse model of tail suspension test (TST). In this study, the acute effect of α-asarone per se at different doses (10-100 mg/kg, i.p.) on immobility in the TST was studied. Additionally, the possible mechanism(s) involved in the antidepressant-like effect of α-asarone was studied using its interaction with noradrenergic and serotonergic neuromodulators in the TST. The present results reveal that the acute treatment of α-asarone elicited biphasic responses on immobility such that the duration of the immobility time is significantly reduced at lower doses (15 and 20 mg/kg, i.p.) but increased at higher doses (50 and 100 mg/kg, i.p.) in the TST. Besides, α-asarone at higher doses (50 and 100 mg/kg, i.p.) significantly decreased the spontaneous locomotor activity. Moreover, pretreatment of mice with noradrenergic neuromodulators such as AMPT (100 mg/kg, i.p., a catecholamine synthesis inhibitor), prazosin (1 mg/kg, i.p., an α1-adrenoceptor antagonist), yohimbine (1 mg/kg, i.p., an α2-adrenoceptor antagonist) and with serotonergic neuromodulators such as PCPA (100 mg/kg, i.p., once daily for four consecutive days, a serotonin synthesis inhibitor,) and WAY100635 (0.1 mg/kg, s.c., a selective 5-HT1A receptor antagonist) significantly reversed the anti-immobility effect of α-asarone (20 mg/kg, i.p.). Taken together, our results suggest that the acute treatment with α-asarone elicited biphasic actions in the TST in which antidepressant-like effect was seen at relatively lower doses (15 and 20 mg/kg, i.p.) and depressive-like activity at relatively higher doses (50 and 100 mg/kg, i.p.). Furthermore, it has been revealed that the antidepressant-like effect of α-asarone could be mediated through both noradrenergic (α1 and α2 adrenoceptors) and serotonergic (particularly, 5-HT1A receptors) systems.

Matched MeSH terms: Serotonin Uptake Inhibitors
Fulltext Emotional incontinence--the other poststroke phenomenon

Bharathi V, Lee FS

Med J Malaysia, 2006 Oct;61(4):490-2.
PMID: 17243530

Emotional incontinence is a disorder of emotional control following brain damage. It refers to the heightened tendency to cry or less commonly laugh, out of proportion to the underlying mood. Recognition of this phenomenon is often lacking as it is confused with other related sequelae of brain damage such as depression. This is a case report of an elderly female exhibiting poststroke emotional incontinence.

Matched MeSH terms: Serotonin Uptake Inhibitors/therapeutic use
Anhedonia in depressed patients on treatment with selective serotonin reuptake inhibitor anti-depressant--A two-centered study in Malaysia

Yee A, Chin SC, Hashim AH, Harbajan Singh MK, Loh HS, Sulaiman AH, et al.

Int J Psychiatry Clin Pract, 2015;19(3):182-7.
PMID: 25874350 DOI: 10.3109/13651501.2015.1031139

Anhedonia is the reduced ability to experience pleasure. It is a core symptom of depression and is particularly difficult to treat. This study aims to compare the level of anhedonia between depressed patients on anti-depressants and healthy subjects.

Matched MeSH terms: Serotonin Uptake Inhibitors/therapeutic use
Fulltext The Risk of Congenital Heart Anomalies Following Prenatal Exposure to Serotonin Reuptake Inhibitors-Is Pharmacogenetics the Key?

Daud AN, Bergman JE, Kerstjens-Frederikse WS, Groen H, Wilffert B

Int J Mol Sci, 2016 Aug 13;17(8).
PMID: 27529241 DOI: 10.3390/ijms17081333

Serotonin reuptake inhibitors (SRIs) are often prescribed during pregnancy. Previous studies that found an increased risk of congenital anomalies, particularly congenital heart anomalies (CHA), with SRI use during pregnancy have created concern among pregnant women and healthcare professionals about the safety of these drugs. However, subsequent studies have reported conflicting results on the association between CHA and SRI use during pregnancy. These discrepancies in the risk estimates can potentially be explained by genetic differences among exposed individuals. In this review, we explore the potential pharmacogenetic predictors involved in the pharmacokinetics and mechanism of action of SRIs, and their relation to the risk of CHA. In general, the risk is dependent on the maternal concentration of SRIs and the foetal serotonin level/effect, which can be modulated by the alteration in the expression and/or function of the metabolic enzymes, transporter proteins and serotonin receptors involved in the serotonin signalling of the foetal heart development. Pharmacogenetics might be the key to understanding why some children exposed to SRIs develop a congenital heart anomaly and others do not.

Matched MeSH terms: Serotonin Uptake Inhibitors/adverse effects*
Serotonin Selective Reuptake Inhibitors (SSRIs) and Female Sexual Dysfunction (FSD): Hypothesis on its Association and Options of Treatment

Rappek NAM, Sidi H, Kumar J, Kamarazaman S, Das S, Masiran R, et al.

Curr Drug Targets, 2018;19(12):1352-1358.
PMID: 28025939 DOI: 10.2174/1389450117666161227142947

Sexual dysfunctions are commonly seen in women on selective serotonin reuptake inhibitors (SSRIs). The complexities of female sexual functioning are reflected through modulation of inter- playing factors like the neuropsychophysiological factors, inter-personal and relationship issue, psychiatric co-morbidities and physical disorder. The incidence of SSRIs-induced FSD is difficult to estimate because of the potential confounding effects of SSRIs, presence of polypharmacy, marital effect, socio-cultural factors and due to the design and assessment problems in majority of the studies. The exact mechanism of FSD-induced SSRIs is unknown. It has been postulated that although SSRIs may modulate other neurotransmitter system such as nitric oxide (NO), noradrenergic and dopamine in inducing FSD. In the present review, we highlight current evidence regarding potential mechanism of SSRIs in causing FSD, which include low sexual desire (low libido), arousal difficulties (lack of lubrication), and anorgasmia. The specific association of FSD to SSRI use, has not been ellucidated. The relationship is dose-dependent, and may vary among the groups with respect to mechanism of serotonin and dopamine reuptake, induction of release of prolactin from the pituitary gland, anticholinergic side-effects, inhibition of NO synthesis and emotional-memory circuit encryption for sexual experiences. Various interventional strategies exist regarding the treatment of SSRI-induced FSD and this includes tolerance, titration dosage, substitution to another antidepressant drug and psychotherapy. There is a need of better understanding of SSRIs-induced FSD for better treatment outcome.

Matched MeSH terms: Serotonin Uptake Inhibitors/adverse effects*
Autism and trichotillomania in an adolescent boy

Masiran R

BMJ Case Rep, 2018 Sep 05;2018.
PMID: 30185454 DOI: 10.1136/bcr-2018-226270

An adolescent with autism spectrum disorder and improperly treated attention deficit hyperactivity disorder presented with recurrent hair pulling. Treatment with selective serotonin reuptake inhibitor and stimulant improved these conditions.

Matched MeSH terms: Serotonin Uptake Inhibitors/therapeutic use*
Association between functional polymorphisms in serotonin transporter gene (SLC6A4) and escitalopram treatment response in depressive patients in a South Indian population

Mandal T, Bairy LK, Sharma PSVN

Eur J Clin Pharmacol, 2020 Jun;76(6):807-814.
PMID: 32253447 DOI: 10.1007/s00228-020-02866-4

PURPOSE: Ethnicity plays a key role in deciding the direction of the association between serotonin transporter gene polymorphisms and treatment response of selective serotonin reuptake inhibitors (SSRIs). The present study explored the association of 5HTTLPR and 5HTTLPR-rs25531 polymorphisms with the treatment response of escitalopram in South Indian patients with major depressive disorder.
METHODS: A total of 148 depressive patients receiving escitalopram 10-20 mg/day were genotyped for 5HTTLPR and rs25531 polymorphisms. Clinical assessment was done at baseline and after 4, 8, and 12 weeks using the 17-item Hamilton Depression Rating Scale (HDRS-17), Montgomery-Asberg Depression Rating Scale (MADRS), and Clinical Global Impression Scale (CGI). At the end of week 12, patients were defined as responders and non-responders based on HDRS17 and MADRS scores. Chi-square test and logistic regression analysis were performed to investigate the genotypic influence on treatment response. Comparison of continuous variables among different groups was done using Student's t test or one-way ANOVA.
RESULTS: Out of 148 study subjects, 65 (43.9%) were responders and 83 (56.08%) were non-responders. We observed a significant (p value

Matched MeSH terms: Serotonin Uptake Inhibitors/therapeutic use*
Association between 5HT2A polymorphism and selective serotonin re-uptake inhibitor (SSRI)-induced sexual desire disorder (SDD) among Malaysian women

Masiran R, Sidi H, Mohamed Z, Mohamed Saini S, Nik Jaafar NR

Asia Pac Psychiatry, 2013 Apr;5 Suppl 1:41-9.
PMID: 23857836 DOI: 10.1111/appy.12043

SSRIs are known for their sexual side-effects with a variable rate of sexual dysfunction (SD). 5HT2A (rs6311) single nucleotide polymorphism (SNP) was found to have significant association with SD. The purpose of this study was to determine the prevalence of female SDD, its clinical correlates and association with 5HT2A (rs6311) SNP in patients with major depressive disorder (MDD) treated with SSRIs.

Matched MeSH terms: Serotonin Uptake Inhibitors/adverse effects*; Serotonin Uptake Inhibitors/therapeutic use

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