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Almaary KS, Alharbi NS, Al-Huwaymil RM, Kadaikunnan S, Alobaidi AS, Khaled JM. Evaluation of stability of (1R,2 S)-(-)-2-methylamino-1-phenyl-1-propanol hydrochloride in plasma and urine samples-inoculated with Escherichia coli using high-performance liquid chromatography (HPLC). World J Microbiol Biotechnol 2024; 40:96. [PMID: 38349591 PMCID: PMC10864430 DOI: 10.1007/s11274-024-03890-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 01/09/2024] [Indexed: 02/15/2024]
Abstract
The preservation of drug stability in biological evidence during the processes of collection and storage poses a substantial obstacle to the progress of forensic investigations. In conjunction with other constituents, the microorganisms present in the samples play a vital role in this investigation. The present investigation employed the high-performance liquid chromatography (HPLC) technique to assess the stability of (1R,2 S)-(-)-2-methylamino-1-phenyl-1-propanol hydrochloride in plasma and urine samples that were inoculated with Escherichia coli. These samples were subjected to storage conditions of 37 °C for 48 h and - 20 °C for a duration of 6 months. Minimal inhibitory concentration (MIC) and Minimal bactericidal concentration (MBC) of MPPH against E. coli were determined using microdilution method. The stability of MPPH in plasma and urine samples inoculated with E. coli was investigated using HPLC method. The results showed the MIC and MBC of MPPH were 87.5 ± 25 ppm and 175 ± 50 ppm, respectively. While MPPH remained stable in plasma for 48 h at 37 °C, it showed a notable decrease of about 11% in stability when stored in urine for the same period and temperature. From the beginning of the first month, a decrease in the stability of the compound appeared in all samples that were stored at - 20 °C, and the decrease reached 7% for plasma samples and about 11% for urine samples. The decrease in the stability reached its peak in the sixth month, reaching more than 30% and 70% of plasma and urine samples preserved at - 20 °C. This work concluded that E. coli can negatively affect the stability of MPPH in plasma and urine samples. This may lead to incorrect conclusions regarding the analysis of biological samples in criminal cases.
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Affiliation(s)
- Khalid S Almaary
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Naiyf S Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Rayan M Al-Huwaymil
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Shine Kadaikunnan
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Ahmed S Alobaidi
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Jamal M Khaled
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, 11451, Riyadh, Saudi Arabia.
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Hadzipasic M, Karsten MB, Olson H, Rodan L, Lidov H, Prabhu SP, Wright K, Fehnel KP. Medulloblastoma in the setting of megalencephaly polymicrogyria polydactyly hydrocephalus. Am J Med Genet A 2021; 185:1614-1618. [PMID: 33634562 DOI: 10.1002/ajmg.a.62125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/19/2021] [Accepted: 01/23/2021] [Indexed: 01/07/2023]
Affiliation(s)
- Muhamed Hadzipasic
- Department of Neurosurgery, Massachusetts General Hospital, Harvard University, Boston, Massachusetts, USA
| | - Madeline B Karsten
- Department of Neurosurgery, Boston Children's Hospital, Harvard University, Boston, Massachusetts, USA
| | - Heather Olson
- Department of Neurology, Boston Children's Hospital, Harvard University, Boston, Massachusetts, USA
| | - Lance Rodan
- Department of Genetics, Boston Children's Hospital, Harvard University, Boston, Massachusetts, USA
| | - Hart Lidov
- Department of Pathology, Boston Children's Hospital, Harvard University, Boston, Massachusetts, USA
| | - Sanjay P Prabhu
- Department of Radiology, Boston Children's Hospital, Harvard University, Boston, Massachusetts, USA
| | - Karen Wright
- Neuro-oncology, Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard University, Boston, Massachusetts, USA
| | - Katie Pricola Fehnel
- Department of Neurosurgery, Boston Children's Hospital, Harvard University, Boston, Massachusetts, USA
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Cappuccio G, Ugga L, Parrini E, D'Amico A, Brunetti-Pierri N. Severe presentation and complex brain malformations in an individual carrying a CCND2 variant. Mol Genet Genomic Med 2019; 7:e708. [PMID: 31056854 PMCID: PMC6565554 DOI: 10.1002/mgg3.708] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/07/2019] [Accepted: 04/08/2019] [Indexed: 01/24/2023] Open
Abstract
Background Megalencephaly‐polymicrogyria‐polydactyly‐hydrocephalus (MPPH) is a developmental brain disorder characterized by megalencephaly and bilateral perisylvian polymicrogyria due to defects in genes of the PI3K‐AKT pathway. Only a few patients with CCND2 mutations have been reported to date. Methods We describe an individual harboring a de novo variant in CCND2 undergoing neuroradiological evaluation including diffusion tensor imaging (DTI). Results The individual presented with a severe brain malformation extending to both brainstem and cerebellum with hypomyelination not previously reported in CCND2‐related disorder. Severe hypoplasia and white matter disorganization were confirmed by DTI. Conclusion This report expands the phenotypic spectrum of the disorder due to CCND2 variants.
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Affiliation(s)
- Gerarda Cappuccio
- Department of Translational Medicine, Federico II University, Naples, Italy.,Telethon Institute of Genetics and Medicine, Pozzuoli, Naples, Italy
| | - Lorenzo Ugga
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Elena Parrini
- Pediatric Neurology, Neurogenetics and Neurobiology Unit and Laboratories, Neuroscience Department, A. Meyer Children's Hospital, University of Florence, Florence, Italy
| | - Alessandra D'Amico
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Nicola Brunetti-Pierri
- Department of Translational Medicine, Federico II University, Naples, Italy.,Telethon Institute of Genetics and Medicine, Pozzuoli, Naples, Italy
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Negishi Y, Miya F, Hattori A, Johmura Y, Nakagawa M, Ando N, Hori I, Togawa T, Aoyama K, Ohashi K, Fukumura S, Mizuno S, Umemura A, Kishimoto Y, Okamoto N, Kato M, Tsunoda T, Yamasaki M, Kanemura Y, Kosaki K, Nakanishi M, Saitoh S. A combination of genetic and biochemical analyses for the diagnosis of PI3K-AKT-mTOR pathway-associated megalencephaly. BMC Med Genet 2017; 18:4. [PMID: 28086757 PMCID: PMC5237172 DOI: 10.1186/s12881-016-0363-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Accepted: 12/21/2016] [Indexed: 11/10/2022]
Abstract
Background Constitutive activation of the PI3K-AKT-mTOR pathway (mTOR pathway) underlies megalencephaly in many patients. Yet, prevalence of the involvement of the PI3K-AKT-mTOR pathway in patients with megalencephaly remains to be elucidated, and molecular diagnosis is challenging. Here, we have successfully established a combination of genetic and biochemical methods for diagnosis of mTOR pathway-associated megalencephaly, and have attempted to delineate the clinical characteristics of the disorder. Methods Thirteen patients with an increased head circumference and neurological symptoms participated in the study. To evaluate the activation of the mTOR pathway, we performed western blot analysis to determine the expression levels of phosphorylated S6 ribosomal protein (phospho-S6 protein) in lymphoblastoid cell lines from 12 patients. Multiplex targeted sequencing analysis for 15 genes involved in the mTOR pathway was performed on 12 patients, and whole-exome sequencing was performed on one additional patient. Clinical features and MRI findings were also investigated. Results We identified pathogenic mutations in six (AKT3, 1 patient; PIK3R2, 2 patients; PTEN, 3 patients) of the 13 patients. Increased expression of phospho-S6 protein was demonstrated in all five mutation-positive patients in whom western blotting was performed, as well as in three mutation-negative patients. Developmental delay, dysmorphic facial features were observed in almost all patients. Syndactyly/polydactyly and capillary malformations were not observed, even in patients with AKT3 or PIK3R2 mutations. There were no common phenotypes or MRI findings among these patients. Conclusions A combination of genetic and biochemical methods successfully identified mTOR pathway involvement in nine of 13 (approximately 70%) patients with megalencephaly, indicating a major contribution of the pathway to the pathogenesis of megalencephaly. Our combined approach could be useful to identify patients who are suitable for future clinical trials using an mTOR inhibitor.
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Affiliation(s)
- Yutaka Negishi
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan
| | - Fuyuki Miya
- Department of Medical Science Mathematics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.,Laboratory for Medical Science Mathematics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Ayako Hattori
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan
| | - Yoshikazu Johmura
- Department of Cell Biology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan.,Present address: Division of Cancer Cell Biology, Department of Cancer Biology, Instuite of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Motoo Nakagawa
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Naoki Ando
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan
| | - Ikumi Hori
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan
| | - Takao Togawa
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan
| | - Kohei Aoyama
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan
| | - Kei Ohashi
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan
| | - Shinobu Fukumura
- Department of Pediatrics, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Seiji Mizuno
- Department of Pediatrics, Central Hospital, Aichi Human Service Center, Aichi, Japan
| | - Ayako Umemura
- Department of Pediatric Neurology, Central Hospital, Aichi Human Service Center, Aichi, Japan
| | - Yoko Kishimoto
- Department of Pediatrics, Shimada Ryoiku Center Hachiouji, Tokyo, Japan
| | - Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan
| | - Mitsuhiro Kato
- Department of Pediatrics, Yamagata University Faculty of Medicine, Yamagata, Japan.,Present address: Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
| | - Tatsuhiko Tsunoda
- Department of Medical Science Mathematics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.,Laboratory for Medical Science Mathematics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Mami Yamasaki
- Department of Neurosurgery, Takatsuki General Hospital, Osaka, Japan
| | - Yonehiro Kanemura
- Division of Regenerative Medicine, Institute for Clinical Research, Osaka National Hospital, National Hospital Organization, Osaka, Japan.,Department of Neurosurgery, Osaka National Hospital, National Hospital Organization, Osaka, Japan
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Makoto Nakanishi
- Laboratory for Medical Science Mathematics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.,Present address: Division of Cancer Cell Biology, Department of Cancer Biology, Instuite of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Shinji Saitoh
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-Cho, Mizuho-Ku, Nagoya, 467-8601, Japan.
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