PMID- 33190395 OWN - NLM STAT- MEDLINE DCOM- 20211004 LR - 20211004 IS - 1742-7843 (Electronic) IS - 1742-7835 (Linking) VI - 128 IP - 3 DP - 2021 Mar TI - Influence of single nucleotide polymorphism of LAT1 on therapeutic response to gabapentinoids in Pakistani patients with neuropathic pain. PG - 503-510 LID - 10.1111/bcpt.13534 [doi] AB - Gabapentinoids are substrate of L-type amino acid transporter 1 (LAT1) for distribution across the blood-brain barrier. The present study aimed to evaluate the effect of LAT1 rs4240803 genetic polymorphism on the clinical efficacy and tolerability of gabapentinoids in Pakistani patients with neuropathic pain. Three-hundred and ninety-two patients were recruited, genotyped for SNP rs4240803, and followed up for eight weeks to evaluate the clinical response to gabapentinoids in terms of pain relief, inadequate response, and the emergence of adverse events. LAT1 rs4240803 GG, GA, and AA genotype frequency were 33.42%, 47.96% and 18.62%, respectively. Out of 392 patients, 323 responded to the treatment and 17.6% discontinued either due to insufficient response or intolerable adverse events (AEs). GA genotype was more frequent in non-responder group (P < 0.001). Maximum pain responders (>/=50%) in combination with the lowest incidence of AEs were observed in the GG group, whereas partial responders belonged to GA genotype and with the highest frequency of somnolence (83.6%) and dizziness (69.9%). Overall, 72.5% patients with GA genotype experienced AEs (P < 0.001). In conclusion, clinical outcomes of gabapentinoids are influenced by LAT1 rs4240803 polymorphism and population pharmacogenetics should be considered to evaluate the maximum potential of gabapentinoids in the management of neuropathic pain. CI - (c) 2020 Nordic Association for the Publication of BCPT (former Nordic Pharmacological Society). FAU - Shaheen, Abida AU - Shaheen A AUID- ORCID: 0000-0001-8977-9820 AD - Department of Pharmacology & Therapeutics, Shifa College of Medicine, Shifa Tameer-e-Millat University, Islamabad, Pakistan. FAU - Alam, Syed Mahboob AU - Alam SM AD - Department of Pharmacology and Therapeutics, Basic Medical Sciences Institute, JPMC, Karachi, Pakistan. FAU - Azam, Fahad AU - Azam F AD - Department of Pharmacology & Therapeutics, Shifa College of Medicine, Shifa Tameer-e-Millat University, Islamabad, Pakistan. FAU - Khan, Moosa AU - Khan M AD - Department of Pharmacology & Therapeutics, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan. FAU - Ahmad Saleem, Salman AU - Ahmad Saleem S AD - Department of Pain Clinic, Shifa International Hospital, Islamabad, Pakistan. FAU - Liaquat, Afrose AU - Liaquat A AD - Department of Biochemistry, Shifa College of Medicine, Shifa Tameer-e-Millat University, Islamabad, Pakistan. FAU - Mumtaz, Sana AU - Mumtaz S AD - Department of Psychosomatic Medicine and Psychotherapy, University Medical Center GÓ§ttingen, GÓ§ttingen, Germany. LA - eng GR - Shifa Tameer-e-Millat University, Islamabad, Pakistan/ PT - Journal Article DEP - 20201212 PL - England TA - Basic Clin Pharmacol Toxicol JT - Basic & clinical pharmacology & toxicology JID - 101208422 RN - 0 (Large Neutral Amino Acid-Transporter 1) RN - 0 (SLC7A5 protein, human) RN - 6CW7F3G59X (Gabapentin) SB - IM MH - Adult MH - Female MH - Gabapentin/adverse effects/*therapeutic use MH - Genotype MH - Humans MH - Large Neutral Amino Acid-Transporter 1/*genetics MH - Male MH - Middle Aged MH - Neuralgia/*drug therapy/genetics MH - *Polymorphism, Single Nucleotide OTO - NOTNLM OT - gabapentin OT - neuropathic pain OT - pharmacogenetics OT - polymorphism OT - pregabalin EDAT- 2020/11/16 06:00 MHDA- 2021/10/05 06:00 CRDT- 2020/11/15 20:38 PHST- 2020/09/22 00:00 [received] PHST- 2020/11/02 00:00 [revised] PHST- 2020/11/09 00:00 [accepted] PHST- 2020/11/16 06:00 [pubmed] PHST- 2021/10/05 06:00 [medline] PHST- 2020/11/15 20:38 [entrez] AID - 10.1111/bcpt.13534 [doi] PST - ppublish SO - Basic Clin Pharmacol Toxicol. 2021 Mar;128(3):503-510. doi: 10.1111/bcpt.13534. Epub 2020 Dec 12.