Pharmacogenomics

Impact of INSR (rs2229429) G>A genetic polymorphism on response to exogenous insulin in type 1 diabetic Iraqi patients

Sun, 2025-03-02 06:00

Wiad Lek. 2024;78(1):71-81. doi: 10.36740/WLek/199949.

ABSTRACT

OBJECTIVE: Aim: To examine prevalence of genotypic distribution, particularly assessing how genetic polymorphisms in Insulin Receptor gene influence effectiveness of insulin therapy in a sample of Iraqi population.

PATIENTS AND METHODS: Materials and Methods: Effect of Single Nucleotide Polymorphisms rs2229429 G>A have been investigated in 99 T1DM individuals, with a mean age of 12.3 years. These patients were managed with exogenous insulin through a basal-bolus monotherapy regimen. Genotyping was performed using an allele-specific polymerase chain reaction technique, and the data were statistically analyzed.

RESULTS: Results: The prevalence of the minor allele frequency is 12% in a sample of Iraqi population. Homozygous mutant carriers of rs2229429 G>A were 10.479 times at higher risk for developing poor glycemic control (HbA1c >86 mmol/mol) compared to wild genotype in type 1 diabetes mellitus, p=0.008. Ultimately poor responders to exogenous insulin, demonstrating significantly higher plasma insulin receptors levels p<0.001.

CONCLUSION: Conclusions: The investigated Single Nucleotide Polymorphisms is significantly associated with hyperglycemia in type 1 diabetes mellitus and contributes to the development of double diabetes.

PMID:40023858 | DOI:10.36740/WLek/199949

Categories: Literature Watch

TLR4 downregulation protects against cisplatin-induced ototoxicity in adult and pediatric patients with cancer

Sat, 2025-03-01 06:00

J Pharmacol Exp Ther. 2025 Feb;392(2):100057. doi: 10.1016/j.jpet.2024.100057. Epub 2024 Dec 9.

ABSTRACT

Cisplatin causes permanent hearing loss or cisplatin-induced ototoxicity in over 50% of treated patients with cancer, leading to significant social and functional limitations. Interindividual variability in developing hearing loss suggests the role of genetic predispositions to cisplatin-induced hearing loss. We investigated genetic associations between cisplatin-induced ototoxicity and toll-like receptor 4 (TLR4), an immune receptor known to mediate inflammatory responses to cisplatin. Using a case-control candidate gene approach, we identified 20 single nucleotide polymorphisms at the TLR4 locus with significant protection against ototoxicity in a cohort of 213 adult patients, followed by an independent pediatric patient cohort (n = 357). Combined cohort analysis demonstrated a significant association between cisplatin-induced ototoxicity protection and a single variant in the TLR4 promoter, rs10759932. We showed that rs10759932 downregulated TLR4 expression that is normally induced by cisplatin. This work provides pharmacogenetic and functional evidence to implicate TLR4 with cisplatin-induced hearing loss in patients. SIGNIFICANCE STATEMENT: Adult and pediatric patients carrying toll-like receptor 4 (TLR4) genetic variants were protected against developing cisplatin-induced hearing loss following cisplatin treatment. Important variants in the TLR4 promoter disrupted a drug-gene interaction between cisplatin and TLR4, mirroring the protective effect conferred by genetic inhibition of TLR4. These variants have the potential to improve the prediction of cisplatin toxicity, allowing for more precise chemotherapy treatment.

PMID:40023593 | DOI:10.1016/j.jpet.2024.100057

Categories: Literature Watch

Decoding chromosomal instability insights in CRC by integrating omics and patient-derived organoids

Fri, 2025-02-28 06:00

J Exp Clin Cancer Res. 2025 Feb 28;44(1):77. doi: 10.1186/s13046-025-03308-8.

ABSTRACT

BACKGROUND: Chromosomal instability (CIN) is involved in about 70% of colorectal cancers (CRCs) and is associated with poor prognosis and drug resistance. From a clinical perspective, a better knowledge of these tumour's biology will help to guide therapeutic strategies more effectively.

METHODS: We used high-density chromosomal microarray analysis to evaluate CIN level of patient-derived organoids (PDOs) and their original mCRC tissues. We integrated the RNA-seq and mass spectrometry-based proteomics data from PDOs in a functional interaction network to identify the significantly dysregulated processes in CIN. This was followed by a proteome-wGII Pearson correlation analysis and an in silico validation of main findings using functional genomic databases and patient-tissues datasets to prioritize the high-confidence CIN features.

RESULTS: By applying the weighted Genome Instability Index (wGII) to identify CIN, we classified PDOs and demonstrated a good correlation with tissues. Multi-omics analysis showed that our organoids recapitulated genomic, transcriptomic and proteomic CIN features of independent tissues cohorts. Thanks to proteotranscriptomics, we uncovered significant associations between mitochondrial metabolism and epithelial-mesenchymal transition in CIN CRC PDOs. Correlating PDOs wGII with protein abundance, we identified a subset of proteins significantly correlated with CIN. Co-localisation analysis in PDOs strengthened the putative role of IPO7 and YAP, and, through in silico analysis, we found that some of the targets give significant dependencies in cell lines with CIN compatible status.

CONCLUSIONS: We first demonstrated that PDO models are a faithful reflection of CIN tissues at the genetic and phenotypic level. Our new findings prioritize a subset of genes and molecular processes putatively required to cope with the burden on cellular fitness imposed by CIN and associated with disease aggressiveness.

PMID:40022181 | DOI:10.1186/s13046-025-03308-8

Categories: Literature Watch

Unravelling the implementation of pharmacogenetic testing in Belgium

Fri, 2025-02-28 06:00

Eur J Clin Pharmacol. 2025 Feb 28. doi: 10.1007/s00228-025-03816-8. Online ahead of print.

ABSTRACT

PURPOSE: Although already a lot of research has been done on pharmacogenetic tests to inform the choice and/or dosing of medicines, the implementation and clinical uptake remain limited. This study assessed the implementation of pharmacogenetic (PGx) testing on a national scale by analyzing access to and volumes of reimbursed PGx.

METHODS: The use of pharmacogenetic tests was examined via a cross-sectional online survey among the Belgian laboratories, collecting data on PGx targets, testing volumes and technologies used. The focus was on reimbursed tests. Additional data were sourced from the national reimbursement database to describe uptake of testing per medication.

RESULTS: The uptake of PGx testing in Belgium varied by medication, with significant implementation for fluoropyrimidines, abacavir, and thiopurines. DPYD gene testing was the most frequently performed PGx test, due to endorsed (inter)national guidelines. Reimbursement rules shape access to PGx, with the majority of PGx tests performed in dedicated centers for human genetics (CHG). Access to HLA laboratories for HLA targets was not optimal and some laboratories without a CHG also included constitutional PGx targets in somatic oncology panels.

CONCLUSION: This nationwide study demonstrates that in a country where the prescribers have access to a relatively extensive list of reimbursable PGx tests, the implementation of PGx testing is shaped by the presence of endorsed evidence-based clinical practice guidelines, as well as organizational and logistical factors.

PMID:40019504 | DOI:10.1007/s00228-025-03816-8

Categories: Literature Watch

Posttransplantation diabetes mellitus (PTDM): pharmacological aspects and genetic predispositions

Fri, 2025-02-28 06:00

Pharmacogenomics. 2025 Feb 28:1-12. doi: 10.1080/14622416.2025.2470613. Online ahead of print.

ABSTRACT

Posttransplantation diabetes mellitus (PTDM) is a form of diabetes developed after solid organ or stem cell transplantation. This condition shares physiopathological traits with type 2 diabetes, including insulin resistance and β-cells dysfunction and its prevalence varies significantly based on the diagnostic criteria used. Immunosuppressive drugs directly contribute to PTDM risk through intricate impacts on glucose regulation, insulin secretion, and inflammation. In addition, modifiable and non-modifiable environmental risk factors are associated with the onset of this condition. This review aims to provide a comprehensive overview of the multifactorial nature of PTDM in order to highlight candidate genes and variants for pharmacogenetic research. An extensive literature search was conducted to identify studies on pharmacological and genetic factors influencing PTDM development. This review stresses the importance of understanding these interactions for improving PTDM management and underscores the need for further research to refine preventive approaches, ultimately enhancing patient outcomes post-transplantation.

PMID:40017426 | DOI:10.1080/14622416.2025.2470613

Categories: Literature Watch

Drivers of Bronchodilator Use in Bronchiolitis: Analyzing Treatment Trends From Pediatric Emergency Department Practices

Fri, 2025-02-28 06:00

Pediatr Emerg Care. 2025 Feb 28. doi: 10.1097/PEC.0000000000003360. Online ahead of print.

ABSTRACT

OBJECTIVES: This study aims to evaluate patient characteristics associated with bronchodilator (BD) use at various stages of bronchiolitis illness and evaluate corresponding patient outcomes in the emergency department (ED).

METHODS: This retrospective, cross-sectional study involves secondary data analysis from a sample of 932 children ages 3 to 24 months who received a diagnosis of bronchiolitis during an ED visit (1057 cases). Predictor variables included demographics, past medical history, family history, physical findings, medication use, and disposition. Outcomes included BD use for bronchiolitis symptoms in the pre-ED and ED settings, and associated care outcomes in the ED. Predictors of BD use in the ED with statistical significance were incorporated in a predictive multivariable logistic regression model with a training-validation split of 70% to 30%.

RESULTS: Children with prior BD use were significantly more likely than children without such history to receive BD treatment during their current bronchiolitis illness before the ED [odds ratio (OR): 23.7, 95% CI: 14.4-39], in the ED (OR: 2.6, 95% CI: 1.76-3.77), and as a prescription upon discharge from the ED (OR: 3.7, 95% CI: 2.49-5.58). In multivariable regression analyses, older age, parental asthma history, and wheezes and retractions on ED physical examination were significantly associated with BD use in the ED (P<0.05). The area under the curve for the validation model with these variables was 0.826 (95% CI: 0.794-0.858).

CONCLUSIONS: Prior BD use was associated with subsequent use during the current illness, during ED care, and subsequent prescription, forming a cyclical pattern. A perceived bronchospastic phenotype of bronchiolitis may influence clinical practice in ED settings.

PMID:40016874 | DOI:10.1097/PEC.0000000000003360

Categories: Literature Watch

NOTCH3 Variant Position Affects the Phenotype at the Pluripotent Stem Cell Level in CADASIL

Thu, 2025-02-27 06:00

Neuromolecular Med. 2025 Feb 27;27(1):18. doi: 10.1007/s12017-025-08840-6.

ABSTRACT

Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is the most common genetic form of stroke. It is caused by a cysteine-altering variant in one of the 34 epidermal growth factor-like repeat (EGFr) domains of Notch3. NOTCH3 pathogenic variants in EGFr 1-6 are associated with high disease severity, whereas those in EGFr 7-34 are associated with late stroke onset and increased survival. However, whether and how the position of the NOTCH3 variant directly affects the disease severity remains unclear. In this study, we aimed to generate human-induced pluripotent stem cells (hiPSCs) from patients with CADASIL with EGFr 1-6 and 7-34 pathogenic variants to evaluate whether the NOTCH3 position affects the cell phenotype and protein profile of the generated hiPSCs lines. Six hiPSCs lines were generated: two from patients with CADASIL with EGFr 1-6 pathogenic variants, two from patients with EGFr 7-34 variants, and two from controls. Notch3 aggregation and protein profiles were tested in the established six hiPSCs lines. Cell analysis revealed that the NOTCH3 variants did not limit the cell reprogramming efficiency. However, EGFr 1-6 variant position was associated with increased accumulation of Notch3 protein in pluripotent stem cells and proteomic changes related with cytoplasmic reorganization mechanisms. In conclusion, our analysis of hiPSCs derived from patients with CADASIL support the clinical association between the NOTCH3 variant position and severity of CADASIL.

PMID:40016442 | DOI:10.1007/s12017-025-08840-6

Categories: Literature Watch

Endoplasmic reticulum stress inhibition preserves mitochondrial function and cell survival during the early onset of isoniazid-induced oxidative stress

Thu, 2025-02-27 06:00

Chem Biol Interact. 2025 Feb 25:111448. doi: 10.1016/j.cbi.2025.111448. Online ahead of print.

ABSTRACT

A comprehensive understanding of isoniazid (INH)-mediated hepatotoxic effects is essential for developing strategies to predict and prevent severe liver toxicity in tuberculosis treatment. In this study, we used multi-omics profiling in vitro to investigate the toxic effects of INH, revealing significant involvement of endoplasmic reticulum (ER) stress, mitochondrial impairment, redox imbalance, and altered metabolism. Additional analysis using transcriptomics data from repeated time-course INH treatments on human-specific hepatic microtissues revealed that cellular responses to ER stress and oxidative stress happened prior to disturbances in mitochondrial complexes. Mechanistic validation studies using time-lapse measurements of cytosolic and mitochondrial reactive oxygen species (ROS) revealed that INH initially triggered cytosolic ROS increasement and Nrf2 signaling pathway activation before mitochondrial ROS accumulation. Molecular imaging showed that INH subsequently disrupted mitochondrial function by impairing respiratory complexes I-IV and caused mitochondrial membrane proton leakage without affecting mitochondrial complex V, leading to mitochondrial depolarization and reduced ATP production. These disturbances enhanced mitochondrial fission and mitophagy. Our findings highlight the potential of inhibiting ER stress during early INH exposure to mitigate cytosolic and mitochondrial oxidative stress. We also revealed the critical role of Nrf2 signaling in protecting hepatocytes under INH-induced oxidative stress by maintaining redox homeostasis and enabling metabolic reprogramming through regulating antioxidant gene expression and cellular lipid abundance. Alternative antioxidant pathways, including selenocompound metabolism, HIF-1 signaling, and the pentose phosphate pathway-also responded to INH-induced oxidative stress. Collectively, our study emphasizes the importance of ER stress, redox imbalance, metabolic changes, and mitochondrial dysfunction that underlie INH-induced hepatotoxicity.

PMID:40015660 | DOI:10.1016/j.cbi.2025.111448

Categories: Literature Watch

Updated analysis of the pharmacogenomics of pediatric bronchodilator response

Thu, 2025-02-27 06:00

Pharmacogenet Genomics. 2025 Apr 1;35(3):116-118. doi: 10.1097/FPC.0000000000000557. Epub 2024 Dec 19.

ABSTRACT

This short communication serves as an update to previously published pilot study results on bronchodilator response (BDR) in children with asthma. We expanded our cohort from 54 to 165 pediatric patients seeking emergency department care for an asthma exacerbation. We obtained measured BDR before and after albuterol administration using the Pediatric Asthma Severity Score and collected genomic DNA. Based on a literature review, we analyzed whether 21 candidate single-nucleotide polymorphisms (SNPs) were associated with BDR. Among the three SNPs initially reported in our pilot study as significantly associated with BDR (rs912142, rs7081864, and rs7903366), we confirmed that rs7081864 was still significantly associated with suboptimal BDR (odds ratio, 0.47; confidence interval, 0.24-0.92). If externally validated in broader studies, simple outpatient testing for that SNP variant could help guide pharmacologic therapy for acute asthma symptoms.

PMID:40014467 | DOI:10.1097/FPC.0000000000000557

Categories: Literature Watch

Maternal smoking and its short- or long-term impact on offspring liver pathologies: a review of experimental and clinical studies

Thu, 2025-02-27 06:00

Toxicol Res. 2024 Dec 21;41(2):123-129. doi: 10.1007/s43188-024-00271-y. eCollection 2025 Mar.

ABSTRACT

This review investigates the correlation between prenatal tobacco exposure and the risk of liver diseases in offspring. By synthesizing data from clinical trials and animal studies, it provides a comprehensive overview of the potential mechanisms underlying this association. This review begins by analyzing the prevalence of maternal smoking and its impact on fetal development. It then discusses specific liver diseases observed in offspring exposed prenatally to tobacco, such as acute liver injuries and metabolic dysfunction-associated fatty liver disease, and discusses the underlying pathophysiological pathways. Current evidence indicates that altered fetal liver development, oxidative stress, and genetic modifications may predispose offspring to liver diseases. Furthermore, this review highlights the gaps in current research and the need for longitudinal studies to better understand the long-term effects of prenatal tobacco exposure on the liver. The review concludes with recommendations for public health policies aimed at enhancing our understanding of maternal smoking and mitigating its adverse effects on offspring, emphasizing the importance of smoking cessation during pregnancy.

PMID:40013082 | PMC:PMC11850666 | DOI:10.1007/s43188-024-00271-y

Categories: Literature Watch

Epigenomics and the Brain-gut Axis: Impact of Adverse Childhood Experiences and Therapeutic Challenges

Thu, 2025-02-27 06:00

J Transl Gastroenterol. 2024 Jun;2(2):125-130. doi: 10.14218/JTG.2024.00017. Epub 2024 Jun 28.

ABSTRACT

The brain-gut axis represents a bidirectional communication network that integrates neural, hormonal, and immunological signaling between the central nervous system and the gastrointestinal tract. Adverse childhood experiences (ACEs) have increasingly been recognized for their profound impact on this axis, with implications for both mental and physical health outcomes. This mini-review explores the emerging field of epigenomics-specifically, how epigenetic modifications incurred by ACEs can influence the brain-gut axis and contribute to the pathophysiology of various disorders. We examine the evidence linking epigenetic mechanisms such as DNA methylation, histone modifications, and non-coding RNAs to the modulation of gene expression involved in stress responses, neurodevelopment, and immune function-all of which intersect at the brain-gut axis. Additionally, we discuss the emerging potential of the gut microbiome as both a target and mediator of epigenetic changes, further influencing brain-gut communication in the context of ACEs. The methodological and therapeutic challenges posed by these insights are significant. The reversibility of epigenetic marks and the long-term consequences of early life stress require innovative and comprehensive approaches to intervention. This underscores the need for comprehensive strategies encompassing psychosocial, pharmacological, neuromodulation, and lifestyle interventions tailored to address ACEs' individualized and persistent effects. Future directions call for a multi-disciplinary approach and longitudinal studies to uncover the full extent of ACEs' impact on epigenetic regulation and the brain-gut axis, with the goal of developing targeted therapies to mitigate the long-lasting effects on health.

PMID:40012740 | PMC:PMC11864786 | DOI:10.14218/JTG.2024.00017

Categories: Literature Watch

How epigenetics impacts stroke risk and outcomes through DNA methylation: A systematic review

Thu, 2025-02-27 06:00

J Cereb Blood Flow Metab. 2025 Feb 27:271678X251322032. doi: 10.1177/0271678X251322032. Online ahead of print.

ABSTRACT

The impact of DNA methylation (DNAm) on epigenetics has gained prominence in recent years due to its potential influence on ischemic stroke (IS) and treatment outcomes. DNAm is reversible and a better understanding of its role in IS could help identify novel therapeutic targets. The aim of this systematic review was to compile the available data on DNAm in the risk and prognosis of IS and to explore its therapeutic potential. The review process followed the PRISMA criteria. We searched the Pubmed and Cochrane databases to identify studies that used hypothesis free methodological approaches. Of the 459 studies identified, 34 met the inclusion criteria. The studies were categorized as follows: risk of IS; outcomes; and DNAm age. Most studies used genotyping array technology rather than whole-genome sequencing. DNAm testing was mainly based on blood samples. Most studies involved European cohorts. Most of the studies were performed at a single-center with recruitment at the time of stroke. In a few studies, health status was determined longitudinally. This systematic review shows that IS patients are biologically older than expected and present characteristic DNAm patterns related to stroke risk and outcomes. These patterns could be used to develop new treatments with epidrugs.

PMID:40012472 | DOI:10.1177/0271678X251322032

Categories: Literature Watch

Comparative characterization of human accelerated regions in neurons

Wed, 2025-02-26 06:00

Nature. 2025 Feb 26. doi: 10.1038/s41586-025-08622-x. Online ahead of print.

ABSTRACT

Human accelerated regions (HARs) are conserved genomic loci that have experienced rapid nucleotide substitutions following the divergence from chimpanzees1,2. HARs are enriched in candidate regulatory regions near neurodevelopmental genes, suggesting their roles in gene regulation3. However, their target genes and functional contributions to human brain development remain largely uncharacterized. Here we elucidate the cis-regulatory functions of HARs in human and chimpanzee induced pluripotent stem (iPS) cell-induced excitatory neurons. Using genomic4 and chromatin looping information, we prioritized 20 HARs and their chimpanzee orthologues for functional characterization via single-cell CRISPR interference, and demonstrated their species-specific gene regulatory functions. Our findings reveal diverse functional outcomes of HAR-mediated cis-regulation in human neurons, including attenuated NPAS3 expression by altering the binding affinities of multiple transcription factors in HAR202 and maintaining iPS cell pluripotency and neuronal differentiation capacities through the upregulation of PUM2 by 2xHAR.319. Finally, we used prime editing to demonstrate differential enhancer activity caused by several HAR26;2xHAR.178 variants. In particular, we link one variant in HAR26;2xHAR.178 to elevated SOCS2 expression and increased neurite outgrowth in human neurons. Thus, our study sheds new light on the endogenous gene regulatory functions of HARs and their potential contribution to human brain evolution.

PMID:40011774 | DOI:10.1038/s41586-025-08622-x

Categories: Literature Watch

Association Between CYP2D6 Genotypes and Serum Concentrations of Mirtazapine and Mianserin

Wed, 2025-02-26 06:00

Basic Clin Pharmacol Toxicol. 2025 Apr;136(4):e70013. doi: 10.1111/bcpt.70013.

ABSTRACT

The aim of the present study was to investigate the effect of CYP2D6 genotypes on mirtazapine and mianserin serum concentrations. Patients were included retrospectively from a therapeutic drug monitoring service. Multiple linear regression analysis was used to investigate the effect of CYP2D6 genotype, age and sex on mirtazapine and mianserin concentration-to-dose (C/D) ratio. The study included 2315 mirtazapine patients and 474 mianserin patients who were assigned to the genotype-predicted phenotype groups of CYP2D6 poor metabolizers (PMs), intermediate metabolizers (IMs), normal metabolizers (NMs) and ultrarapid metabolizers (UMs). Multiple linear regression analysis revealed 18% and 14% higher mirtazapine C/D ratio in CYP2D6 PMs and IMs, respectively, compared with NMs (p ≤ 0.004). For mianserin, the C/D ratio was 80% and 45% higher in PMs and IMs, respectively, compared with NMs (p < 0.001). The C/D ratio in UMs did not differ from NMs for either drug (p ≥ 0.3). In conclusion, CYP2D6 genotype was only associated with a minor change in mirtazapine serum concentration. The association between CYP2D6 genotype and mianserin serum concentration was greater, with 80% higher mianserin C/D ratio in CYP2D6 PMs compared with NMs.

PMID:40010695 | DOI:10.1111/bcpt.70013

Categories: Literature Watch

Curcumin-Loaded Lipid Nanocarriers: A Targeted Approach for Combating Oxidative Stress in Skin Applications

Wed, 2025-02-26 06:00

Pharmaceutics. 2025 Jan 21;17(2):144. doi: 10.3390/pharmaceutics17020144.

ABSTRACT

Background/Objectives: Oxidative stress significantly impacts skin health, contributing to conditions like aging, pigmentation, and inflammatory disorders. Curcumin, with its potent antioxidant properties, faces challenges of low solubility, stability, and bioavailability. This study aimed to encapsulate curcumin in three lipid nanocarriers-solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs), and nanoemulsions (NEs)-to enhance its stability, bioavailability, and antioxidant efficacy for potential therapeutic applications in oxidative-stress-related skin disorders. Methods: The lipid nanocarriers were characterized for size, polydispersity index, ζ-potential, and encapsulation efficiency. Stability tests under various conditions and antioxidant activity assays (DPPH and FRAP methods) were conducted. Cytotoxicity in human dermal fibroblasts was assessed using MTT assays, while the expression of key antioxidant genes was evaluated in human dermal fibroblasts under oxidative stress. Skin penetration studies were performed to analyze curcumin's distribution across the stratum corneum layers. Results: All nanocarriers demonstrated high encapsulation efficiency and stability over 90 days. NLCs exhibited superior long-term stability and enhanced skin penetration, while NE formulations facilitated rapid antioxidant effects. Antioxidant assays confirmed that curcumin encapsulation preserved and enhanced its bioactivity, particularly in NLCs. Gene expression analysis revealed upregulation of key antioxidant markers (GPX1, GPX4, SOD1, KEAP1, and NRF2) with curcumin-loaded nanocarriers under oxidative and non-oxidative conditions. Cytotoxicity studies confirmed biocompatibility across all formulations. Conclusions: Lipid nanocarriers effectively enhance curcumin's stability, antioxidant activity, and skin penetration, presenting a targeted strategy for managing oxidative stress in skin applications. Their versatility offers opportunities for tailored therapeutic formulations addressing specific skin conditions, from chronic disorders like psoriasis to acute stress responses such as sunburn.

PMID:40006512 | DOI:10.3390/pharmaceutics17020144

Categories: Literature Watch

Association of <em>OPRM1</em> and <em>OPRD1</em> Polymorphisms with Pain and Opioid Adverse Reactions in Colorectal Cancer

Wed, 2025-02-26 06:00

Pharmaceuticals (Basel). 2025 Feb 6;18(2):220. doi: 10.3390/ph18020220.

ABSTRACT

Background/Objectives: Pain management in colorectal cancer is influenced by genetic variability in opioid receptor genes (OPRM1 and OPRD1), potentially affecting opioid efficacy and adverse drug reactions (ADRs). This study evaluated the association of OPRM1 (rs1799971 and rs510769) and OPRD1 (rs2236861) polymorphisms with pain severity, opioid efficacy, and ADRs in Chilean colorectal cancer patients. Methods: The genotypes of OPRM1 and OPRD1 polymorphisms and clinical data from 69 colorectal cancer patients were analyzed. Associations between genotypes, ADRs, and pain severity (maximum Visual Analog Scale, VAS) were evaluated under inheritance models. Results: The OPRM1 rs1799971 G allele was significantly associated with pain presence (p = 0.008), while OPRD1 rs2236861 was linked to ADR risk (p = 0.042). Allelic distribution analysis revealed higher frequencies of the OPRD1 G allele and OPRM1 rs510769 T allele in patients with ADRs and pain, respectively. For OPRM1 rs510769, the dominant model showed a significant association with pain severity (p = 0.033), while the overdominant model revealed a trend toward significance (p = 0.0504). Logistic regression model tests showed no significant predictive associations for the maximum VAS or ADRs under inheritance models. Conclusions: Genetic variations in OPRM1 and OPRD1 may play a role in pain perception and ADRs in colorectal cancer patients. These findings contribute to the understanding of pharmacogenomic factors in opioid therapy, emphasizing the need for further research to validate the clinical utility of these genetic markers.

PMID:40006034 | DOI:10.3390/ph18020220

Categories: Literature Watch

Impact of Genetic Variants on Pregabalin Pharmacokinetics and Safety

Wed, 2025-02-26 06:00

Pharmaceuticals (Basel). 2025 Jan 23;18(2):151. doi: 10.3390/ph18020151.

ABSTRACT

Background/Objectives: Pregabalin is a useful therapeutic option for patients with anxiety or neuropathic pain. Genetic variants in certain genes encoding for transporters related to absorption and distribution could have an impact on the efficacy and safety of the drug. Furthermore, extreme phenotypes in metabolic enzymes could alter pregabalin-limited metabolism. Methods: In this study, we included 24 healthy volunteers participating in a bioequivalence clinical trial and administered pregabalin 300 mg orally; 23 subjects were genotyped for 114 variants in 31 candidate genes, and we explored their impact on pregabalin pharmacokinetics and safety. Results: The uncorrected mean (±SD) of AUC∞ and Cmax were 61,097 ± 14,762 ng*h/mL and 7802 ± 1659 ng/mL, respectively, which were significantly higher in females than in males (p = 0.002 and p = 0.001, respectively), with no differences in dose/weight (DW)- corrected exposure metrics. NAT2 slow acetylators (SAs) showed a 16-18% increase in exposure compared to intermediate (IAs) and normal (NAs) acetylators; NAT2 SAs exhibited a 25% higher t1/2 as compared with NAT2 IAs and 58% higher compared to NAT2 NAs. In contrast, neither the NAT2 phenotype nor other genetic variants were related to pregabalin adverse drug reaction (ADR) occurrence. On the contrary, sex and sex-related exposure differences (i.e., females and their higher exposure compared to males) were the main predictors of ADR occurrence. Conclusions: Our findings suggest that NAT2 could be partially responsible for the minor proportion of pregabalin metabolism, but the effect of NAT2 phenotype does not seem clinically relevant. Therefore, pharmacogenetic biomarkers appear to play a restrained role in pregabalin pharmacotherapy.

PMID:40005966 | DOI:10.3390/ph18020151

Categories: Literature Watch

Oncolytic Viruses in Ovarian Cancer: Where Do We Stand? A Narrative Review

Wed, 2025-02-26 06:00

Pathogens. 2025 Feb 3;14(2):140. doi: 10.3390/pathogens14020140.

ABSTRACT

Ovarian cancer (OC) remains the most lethal gynecologic malignancy with limited effective treatment options. Oncolytic viruses (OVs) have emerged as a promising therapeutic approach for cancer treatment, capable of selectively infecting and lysing cancer cells while stimulating anti-tumor immune responses. Preclinical studies have demonstrated significant tumor regression and prolonged survival in OC models using various OVs, such as herpes simplex. Early-phase clinical trials have shown a favorable safety profile, though the impact on patient survival has been modest. Current research focuses on combining OVs with other treatments like immune checkpoint inhibitors to enhance their efficacy. We provide a comprehensive overview of the current understanding and future directions for utilizing OVs in the management of OC.

PMID:40005517 | DOI:10.3390/pathogens14020140

Categories: Literature Watch

<em>Nasturtium officinale</em> Microshoot Culture Multiplied in PlantForm Bioreactor-Phytochemical Profiling and Biological Activity

Wed, 2025-02-26 06:00

Molecules. 2025 Feb 18;30(4):936. doi: 10.3390/molecules30040936.

ABSTRACT

Nasturtium officinale R. Br. (watercress) is an endangered species with valuable pharmaceutical, cosmetic, and nutritional properties. The purpose of this work was to evaluate the phytochemical profile and biological activity of extracts from microshoot cultures grown in PlantForm bioreactors and the parent plant material. After 20 days of cultivation, the cultures achieved the best results both in terms of key active ingredient content and biological activity. The glucosinolates (GSL) profile by the UHPLC-DAD-MS/MS method showed that the dominant compounds were glucobrassicin (493.00 mg/100 g DW, 10 days) and gluconasturtiin (268.04 mg/100 g DW, 20 days). The highest total polyphenol content (TPC) was obtained after a 20-day growth period (2690 mg GAE/100 g DW). Among polyphenols, the dominant compounds in the extracts from in vitro cultures were sinapinic acid (114.83 mg/100 g DW, 10 days) and ferulic acid (87.78 mg/100 g DW, 20 days). The highest antioxidant potential assessed by ABTS and DPPH assays was observed for ethanol extracts. The best results for inhibiting hyperpigmentation (18.12%) were obtained for ethanol extracts and anti-elastase activity (79.78%) for aqueous extract from N. officinale microshoot cultures. The extracts from microshoot cultures inhibited the growth of bacteria, including Cutibacterium acnes (MIC = 0.625 mg/mL). Antioxidant tests and the chelating capacity of iron ions Fe2+ of the face emulsion with N. officinale extracts showed higher results than the control.

PMID:40005247 | DOI:10.3390/molecules30040936

Categories: Literature Watch

Clinical and Proteomic Insights into a Cytokine Release Syndrome Triggered by Tebentafusp in a Metastatic Uveal Melanoma Patient: Case Report

Wed, 2025-02-26 06:00

J Clin Med. 2025 Feb 17;14(4):1333. doi: 10.3390/jcm14041333.

ABSTRACT

Background: Uveal melanoma is the most common primary intraocular cancer in adults; however, it remains rare. Despite its rarity, metastatic uveal melanoma poses significant treatment challenges. Tebentafusp, a T-cell receptor-bispecific molecule targeting glycoprotein 100 and CD3, has shown substantial survival benefits for HLA-A*02:01 positive patients. A notable complication associated with tebentafusp and similar immunotherapies is cytokine release syndrome (CRS), occurring in nearly 90% of tebentafusp-treated patients. Although typically mild, severe CRS (grade 3) affects around 1% of patients. The unpredictable nature of CRS complicates patient management during treatment. Methods: Monitoring cytokine levels, as key indicators of inflammation, may therefore be crucial for understanding and managing CRS. Advanced proteomic technologies enable the simultaneous measurement of multiple cytokines, providing a comprehensive view of inflammatory responses. Results: In this case, a patient with metastatic uveal melanoma developed CRS after tebentafusp treatment. A proteomic analysis tracked the cytokine changes from baseline to post-treatment, revealing significant elevations in inflammatory markers. Conclusions: These findings suggest potential strategies for more personalized CRS management in similar therapies.

PMID:40004863 | DOI:10.3390/jcm14041333

Categories: Literature Watch

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