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Aguilar-Galindo F, Nguyen VTT, Singh R, Domaracka A, Huber BA, Díaz-Tendero S, Rousseau P, Maclot S. Unexpected and delayed fragmentation dynamics of the organometallic ferrocene induced by ion-collision. Phys Chem Chem Phys 2024; 26:7638-7646. [PMID: 38363201 DOI: 10.1039/d3cp05430f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
We have investigated the fragmentation dynamics of the organometallic ferrocene molecule after interaction with multiply charged ions using multicoincidence mass spectrometry and quantum chemistry calculations. We observed unexpected fragmentation dynamics of the two-body breakup channels from ferrocene dications revealing a charge screening effect from the iron atom and delayed fragmentation dynamics. These observations are rationalized through the population of a specific long-lived excited state, where one positive charge is located on each cyclopentadienyl ring.
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Affiliation(s)
- F Aguilar-Galindo
- Department of Chemistry, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - V T T Nguyen
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - R Singh
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - A Domaracka
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - B A Huber
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - S Díaz-Tendero
- Department of Chemistry, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Institute for Advanced Research in Chemistry (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - P Rousseau
- Normandie Univ., ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - S Maclot
- Institut Lumière Matière UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon, 69100 Villeurbanne, France.
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Nguyen VTT. Primary cilia structure is prolonged in enteric neurons of Alzheimerʼs Disease model mice. PHARMACOPSYCHIATRY 2020. [DOI: 10.1055/s-0039-3402990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Nguyen NYT, Dang PH, Thien Nguyen VT, Vo TT, Nguyen DAT, Nguyen MDH, Dang PH, Tran QL. Nimbandiolactone-21 and nimbandioloxyfuran, two new 28-norlimonoids from the leaves of Azadirachta indica (Meliaceae). J Asian Nat Prod Res 2019; 21:867-872. [PMID: 29986612 DOI: 10.1080/10286020.2018.1476498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/10/2018] [Indexed: 06/08/2023]
Abstract
From an EtOAc-soluble fraction of the leaves of Azadirachta indica, two new 28-norlimonoids named nimbandiolactone-21 (1) and nimbandioloxyfuran (2), together with nimbandiolactone-23 (3), were isolated. Their relative structures were elucidated based on NMR spectroscopic interpretation and biosynthetic consideration. Nimbandioloxyfuran (2) and nimbandiolactone-23 (3) showed potent α-glucosidase inhibitory activity, with the IC50 values of 46.2 and 38.7 μM, respectively.
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Affiliation(s)
- Nhi Y Thi Nguyen
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City 700000 , Vietnam
| | - Phu Hoang Dang
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City 700000 , Vietnam
| | | | - Tuan Trong Vo
- b Faculty of Traditional Medicine, University of Medicine and Pharmacy at Ho Chi Minh City , Ho Chi Minh City 700000 , Vietnam
| | - Dao Anh Thi Nguyen
- b Faculty of Traditional Medicine, University of Medicine and Pharmacy at Ho Chi Minh City , Ho Chi Minh City 700000 , Vietnam
| | - Minh Duc Huu Nguyen
- b Faculty of Traditional Medicine, University of Medicine and Pharmacy at Ho Chi Minh City , Ho Chi Minh City 700000 , Vietnam
| | - Phuc Huu Dang
- c Theoretical Physics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University , Ho Chi Minh City 700000 , Vietnam
- d Faculty of Applied Sciences, Ton Duc Thang University , Ho Chi Minh City 700000 , Vietnam
| | - Quan Le Tran
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City 700000 , Vietnam
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Abstract
Worldwide, 350 million people are chronically infected with hepatitis B virus (HBV) who are at greater risk of hepatocellular carcinoma (HCC) compared with uninfected people. The relative risks of HCC among people infected with HBV ranges from 5 to 49 in case-control studies and from 7 to 98 in cohort studies. More than 50% of HCC cases worldwide and 70-80% of HCC cases in highly HBV endemic regions are attributable to HBV. Incidence of HCC (per 100,000 person/year) among people with chronic HBV infection ranges from 400 to 800 in male and from 120 to 180 in female. Factors associated with increased risk of HCC include demographic characteristics (male sex and older age), lifestyles (heavy alcohol consumption and smoking), viral factors (genotype C, D F, high level of HBV DNA, core/precore mutation) and clinical factors (cirrhosis, elevated alpha-fetoprotein (AFP) and alanine aminotransferase (ALT)). HBV-related HCC has extremely poor prognosis with median survival less than 16 months. Survival rates of HBV-related HCC ranged from 36% to 67% after 1 year and from 15% to 26% after 5 year of diagnosis. Older age, liver function impairment, vascular invasion, tumour aggressiveness and elevated AFP are associated with HCC survival. Global burden of HBV-related liver disease is still a major challenge for public health in the 21st century. While decreases in incidence of HBV infection have been observed in birth cohorts following the introduction of universal infant HBV vaccination programme, HBV-related HCC incidence in is projected to increase for at least two decades because of the high prevalence of chronic HBV infection and prolonged latency to HCC development. To reduce HBV-related HCC continued expansion of universal infant HBV vaccination is required along with antiviral therapy targeted to those individuals at highest risk of HCC. Broad public health strategies should include routine testing to identify chronic HBV infection, improved health infrastructures including human resource to provide diagnosis and treatment assessment.
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Affiliation(s)
- V T T Nguyen
- School of Public Health and Community Medicine, The University of New South Wales, Sydney, Australia.
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