1
|
Zacarias O, Petrovic AG, Abzalimov R, Pradhan P, Champeil E. Synthesis of Oligonucleotides Containing Trans Mitomycin C DNA Adducts at N 6 of Adenine and N 2 of Guanine. Chemistry 2021; 27:14263-14272. [PMID: 34319608 PMCID: PMC8516704 DOI: 10.1002/chem.202102338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/29/2021] [Indexed: 11/09/2022]
Abstract
Mitomycin C, (MC), an antitumor drug, is a DNA alkylating agent currently used in the clinics. Inert in its native form, MC is reduced to reactive mitosenes, which undergo nucleophilic attack by guanine or adenine bases in DNA to form monoadducts as well as interstrand crosslinks (ICLs). Although ICLs are considered the most cytotoxic lesions, the role of each individual adduct in the drug's cytotoxicity is still not fully understood. Synthetic routes have been developed to access modified oligonucleotides containing dG MC-monoadducts and dG-MC-dG ICL at a single position of their base sequences to investigate the biological effects of these adducts. However, until now, oligonucleotides containing monoadducts formed by MC at the adenine base had not been available, thus preventing the examination of the role played by these lesions in the toxicity of MC. Here, we present a route to access these substrates. Structural proof of the adducted oligonucleotides were provided by enzymatic digestion to nucleosides and high-resolution mass spectral analysis. Additionally, parent oligonucleotides containing a dG monoadduct and a dG-MC-dG ICL were also produced. The stability and physical properties of all substrates were compared via CD spectroscopy and UV melting temperature studies. Finally, virtual models were created to explore the conformational space and structural features of these MC-DNA complexes.
Collapse
Affiliation(s)
- Owen Zacarias
- Science Department, John Jay College of Criminal Justice, 524 West 59th street, New York, NY, 10019, USA
| | - Ana G Petrovic
- New York Institute of Technology, 1855 Broadway, EGGC 405 A, New York, NY, 10023, USA
| | - Rinat Abzalimov
- City University of New York, Advanced Research Center, 85 St Nicholas Terrace, New York, NY, 10031, USA
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| | - Padmanava Pradhan
- The City College, 138th Street at Convent Avenue, New York, New York, 10031, USA
| | - Elise Champeil
- Science Department, John Jay College of Criminal Justice, 524 West 59th street, New York, NY, 10019, USA
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| |
Collapse
|
2
|
Johnson JL, Santoro E, Zatout R, Petrovic AG, Cimmino A, Superchi S, Evidente A, Berova ND, Polavarapu PL. Absolute configuration of seco-eudesmanolide inuloxin D from experimental and predicted chiroptical studies of its 4-O-acetyl derivative. Chirality 2021; 33:233-241. [PMID: 33598968 DOI: 10.1002/chir.23301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 12/12/2022]
Abstract
Sesquitepenoids inuloxins A-D, belonging to different subgroups, were isolated from Dittrichia viscosa and showed potential biocontrol of some parasitic plants as Pelipanche, Orobanche, and Cuscuta species. The absolute configurations of the first three inuloxins A-C were previously determined by using experimental and computational chiroptical spectroscopic methods. The absolute configuration of inuloxin D remains to be established. The bioactive inuloxin E, closely related to inuloxin D, was recently isolated from the same plant organic extract. The same relative configuration of inuloxin D was assigned to inuloxin E by comparison of their NMR spectroscopic data. The absolute configurations of inuloxin D and inuloxin E are suggested in this work by analysis of the experimental and predicted chiroptical properties of the 4-O-acetyl derivative of inuloxin D.
Collapse
Affiliation(s)
- Jordan L Johnson
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
| | - Ernesto Santoro
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
| | - Roukia Zatout
- Department of chemical Sciences, University of Naples Federico II, Naples, Italy.,Laboratoire de Mycologie, de Biotechnologie et de l'Activité Microbienne (LaMyBAM), Département de Biologie Appliquée, Université des Frères Mentouri, Constantine, Algeria
| | - Ana G Petrovic
- Department of Chemical and Biological Sciences, New York Institute of Technology, New York, New York, USA
| | - Alessio Cimmino
- Department of chemical Sciences, University of Naples Federico II, Naples, Italy
| | | | - Antonio Evidente
- Department of chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Nina D Berova
- Department of Chemistry, Columbia University, New York, New York, USA
| | | |
Collapse
|
3
|
Aguilar W, Zacarias O, Romaine M, Proni G, Petrovic AG, Abzalimov R, Paz MM, Champeil E. Synthesis of Oligonucleotides containing the cis-Interstrand Crosslink Produced by Mitomycins in their Reaction with DNA. Chemistry 2020; 26:12570-12578. [PMID: 32574396 PMCID: PMC7681910 DOI: 10.1002/chem.202002452] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 05/18/2020] [Indexed: 01/25/2023]
Abstract
Mitomycin C (MC) an antitumor drug and decarbamoylmitomycin C (DMC), a derivative of MC lacking the carbamoyl moiety, are DNA alkylating agents which can form DNA interstrand crosslinks (ICLs) between deoxyguanosine residues located on opposing DNA strands. MC forms primarily deoxyguanosine adducts with a 1"-R stereochemistry at the guanine-mitosene bond (1"-α, trans) whereas DMC forms mainly adducts with a 1"-S stereochemistry (1"-β, cis). The crosslinking reaction is diastereospecific: trans-crosslinks are formed exclusively at CpG sequences, while cis-crosslinks are formed only at GpC sequences. Until now, oligonucleotides containing 1"-β-deoxyguanosine adducts or ICL at a specific site could not be synthesized, thus limiting the investigation of the role played by the stereochemical configuration at C1'' in the toxicity of these compounds. Here, a novel biomimetic synthesis to access these substrates is presented. Structural proof of the adducted oligonucleotides and ICL were provided by enzymatic digestion to nucleosides, high resolution mass spectral analysis, CD spectroscopy and UV melting temperature studies. Finally, a virtual model of the 25-mer 1"-β ICL synthesized was created to explore the conformational space and structural features of the crosslinked duplex.
Collapse
Affiliation(s)
- William Aguilar
- Science Department, John Jay College of Criminal Justice, 524 West 59th street, New York, NY, 10019, USA
| | - Owen Zacarias
- Science Department, John Jay College of Criminal Justice, 524 West 59th street, New York, NY, 10019, USA
| | - Marian Romaine
- Science Department, John Jay College of Criminal Justice, 524 West 59th street, New York, NY, 10019, USA
| | - Gloria Proni
- Science Department, John Jay College of Criminal Justice, 524 West 59th street, New York, NY, 10019, USA
| | - Ana G Petrovic
- New York Institute of Technology, 1855 Broadway, EGGC 405A, New York, NY, 10023, USA
| | - Rinat Abzalimov
- City University of New York, Advanced Research Center, 85 St Nicholas Terrace, New York, NY, 10031, USA
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| | - Manuel M Paz
- Departamento de Química Orgánica, Facultad de Química, Universidade de Santiago de Compostela, Santiago de Compostela, A Coruña, 15782, Spain
| | - Elise Champeil
- Science Department, John Jay College of Criminal Justice, 524 West 59th street, New York, NY, 10019, USA
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, 10016, USA
| |
Collapse
|
4
|
Aguilar W, Zacarias O, Romaine M, Proni G, Petrovic AG, Abzalimov R, Paz MM, Champeil E. Cover Feature: Synthesis of Oligonucleotides containing the
cis
‐Interstrand Crosslink Produced by Mitomycins in their Reaction with DNA (Chem. Eur. J. 55/2020). Chemistry 2020. [DOI: 10.1002/chem.202003300] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- William Aguilar
- Science Department John Jay College of Criminal Justice 524 West 59th street New York NY 10019 USA
| | - Owen Zacarias
- Science Department John Jay College of Criminal Justice 524 West 59th street New York NY 10019 USA
| | - Marian Romaine
- Science Department John Jay College of Criminal Justice 524 West 59th street New York NY 10019 USA
| | - Gloria Proni
- Science Department John Jay College of Criminal Justice 524 West 59th street New York NY 10019 USA
| | - Ana G. Petrovic
- New York Institute of Technology 1855 Broadway, EGGC 405A New York NY 10023 USA
| | - Rinat Abzalimov
- City University of New York Advanced Research Center 85 St Nicholas Terrace New York NY 10031 USA
- Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY 10016 USA
| | - Manuel M. Paz
- Departamento de Química Orgánica Facultad de Química Universidade de Santiago de Compostela Santiago de Compostela, A Coruña 15782 Spain
| | - Elise Champeil
- Science Department John Jay College of Criminal Justice 524 West 59th street New York NY 10019 USA
- Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY 10016 USA
| |
Collapse
|
5
|
Petrovic AG, Polavarapu PL, Łopusiński A, Krasowska D, Wieczorek W, Szyrej M, Błaszczyk J, Drabowicz J. Absolute Configuration and Conformation of (-)- R- t-Butylphenylphosphinoamidate: Chiroptical Spectroscopy and X-ray Analysis. J Org Chem 2020; 85:14456-14466. [PMID: 32786637 PMCID: PMC7684576 DOI: 10.1021/acs.joc.0c00756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
![]()
The
absolute configuration and conformations of (−)-tert-butylphenylphosphinoamidate were determined using three
different chiroptical spectroscopic methods, namely vibrational circular
dichroism (VCD), electronic circular dichroism (ECD), and optical
rotatory dispersion (ORD). In each of the spectroscopic methods used,
experimental data for the (−)-enantiomer of tert-butylphenylphosphinoamidate were measured in the solution phase.
Using the concentration-dependent experimental infrared spectra, the
existence of dimers in the solution was investigated, and the monomer–dimer
equilibrium constant was determined. Concomitant quantum mechanical
predictions of the VCD, ECD, and ORD for monomeric tert-butylphenylphosphinoamidate were carried out using density functional
theory (DFT) calculations using the B3LYP functional and the 6-31G(d),
6-311G(2d,2p) and aug-cc-pVDZ basis sets. Similar predictions for
dimeric tert-butylphenylphosphinoamidate were also
obtained using the B3LYP/6-31G(d) method. A comparison of theoretically
predicted data with the corresponding experimental data led to the
elucidation of the absolute configuration as (−)-(R)-tert-butylphenylphosphinoamidate with one predominant
conformation in the solution. This conclusion was independently supported
by X-ray analysis of the complex with (+)-R-2,2′-dihydroxy-1,1′-binaphthol
((+)-R- BINOL).
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Prasad L Polavarapu
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Andrzej Łopusiński
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - Dorota Krasowska
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - Wanda Wieczorek
- Institute of General and Ecological Chemistry, Technical University of Łódź, Żeromskiego 116, 90-924 Łódź, Poland
| | - Małgorzata Szyrej
- Institute of Chemistry, Jan Długosz University in Częstochowa, Armii Krajowej 13/15, 42-200 Częstochowa, Poland
| | - Jarosław Błaszczyk
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland
| | - Józef Drabowicz
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland.,Institute of Chemistry, Jan Długosz University in Częstochowa, Armii Krajowej 13/15, 42-200 Częstochowa, Poland
| |
Collapse
|
6
|
Ozcelik A, Pereira-Cameselle R, Poklar Ulrih N, Petrovic AG, Alonso-Gómez JL. Chiroptical Sensing: A Conceptual Introduction. Sensors (Basel) 2020; 20:E974. [PMID: 32059394 PMCID: PMC7071115 DOI: 10.3390/s20040974] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/07/2020] [Accepted: 02/09/2020] [Indexed: 12/21/2022]
Abstract
Chiroptical responses have been an essential tool over the last decades for chemical structural elucidation due to their exceptional sensitivity to geometry and intermolecular interactions. In recent times, there has been an increasing interest in the search for more efficient sensing by the rational design of tailored chiroptical systems. In this review article, advances made in chiroptical systems towards their implementation in sensing applications are summarized. Strategies to generate chiroptical responses are illustrated. Theoretical approaches to assist in the design of these systems are discussed. The development of efficient chiroptical reporters in different states of matter, essential for the implementation in sensing devises, is reviewed. In the last part, remarkable examples of chiroptical sensing applications are highlighted.
Collapse
Affiliation(s)
- Ani Ozcelik
- Department of Organic Chemistry, University of Vigo, 36310 Vigo, Spain; (A.O.); (R.P.-C.)
| | | | - Natasa Poklar Ulrih
- Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, Kongresni trg 12, 1000 Ljubljana, Slovenia;
| | - Ana G. Petrovic
- Department of Biological & Chemical Sciences, New York Institute of Technology, New York, NY 10023, USA
| | | |
Collapse
|
7
|
Saha B, Petrovic AG, Dhamija A, Berova N, Rath SP. Complexation of Chiral Zinc(II) Porphyrin Tweezer with Achiral Aliphatic Diamines Revisited: Molecular Dynamics, Electronic CD, and 1H NMR Analysis. Inorg Chem 2019; 58:11420-11438. [DOI: 10.1021/acs.inorgchem.9b00962] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bapan Saha
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Ana G. Petrovic
- Columbia University, Department of Chemistry, 3000 Broadway, New York, New York 10027, United States
- Department of Life Sciences, New York Institute of Technology, 1855 Broadway, New York, New York 10023, United States
| | - Avinash Dhamija
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Nina Berova
- Columbia University, Department of Chemistry, 3000 Broadway, New York, New York 10027, United States
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| |
Collapse
|
8
|
Hetzler BE, Volpin G, Vignoni E, Petrovic AG, Proni G, Hu CT, Trauner D. A Versatile Bis-Allylboron Reagent for the Stereoselective Synthesis of Chiral Diols. Angew Chem Int Ed Engl 2018; 57:14276-14280. [PMID: 30144261 DOI: 10.1002/anie.201808234] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Indexed: 01/03/2023]
Abstract
Allylboron reagents are popular in synthesis owing to their versatility and the predictable stereochemical outcomes of their reactions with carbonyl compounds. Herein, we describe the synthesis of (Z,Z)-hexadienyl bis-boronate 1, a configurationally stable, crystalline, and easy to handle compound, which represents a class of bis-allylic boron reagents with heretofore untapped synthetic potential. In combination with a chiral phosphoric acid catalyst, the reagent can be employed for the enantioselective allyl transfer reaction to a variety of one-pot transformations, enabling swift access to functionalized 1,n-diols. The in situ conversion of the reagent into the corresponding bis-borinic ester allows for the direct and diastereoselective two-fold allyl transfer to aldehydes. This affords C2 - or Ci -symmetric stereotetrads containing a 1,4-diol moiety for natural product synthesis. The usefulness of our method was demonstrated with a short synthesis of the lignan (±)-neo-olivil.
Collapse
Affiliation(s)
- Belinda E Hetzler
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Giulio Volpin
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Elisa Vignoni
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Ana G Petrovic
- Department of Life Sciences, New York Institute of Technology, 1855 Broadway, New York, NY, 10023, USA
| | - Gloria Proni
- Department of Sciences, John Jay College of Criminal Justice, 524 West 54th Street, New York, NY, 10019, USA
| | - Chunhua T Hu
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| | - Dirk Trauner
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA
| |
Collapse
|
9
|
Hetzler BE, Volpin G, Vignoni E, Petrovic AG, Proni G, Hu CT, Trauner D. Ein vielseitiges Bisallylbor‐Reagenz für die stereoselektive Synthese von chiralen Diolen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Belinda E. Hetzler
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Giulio Volpin
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Elisa Vignoni
- Department of Drug Sciences University of Pavia Via Taramelli 12 27100 Pavia Italien
| | - Ana G. Petrovic
- Department of Life Sciences New York Institute of Technology 1855 Broadway New York NY 10023 USA
| | - Gloria Proni
- Department of Sciences John Jay College of Criminal Justice 524 West 54th Street New York NY 10019 USA
| | - Chunhua T. Hu
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| | - Dirk Trauner
- Department of Chemistry New York University 100 Washington Square East New York NY 10003 USA
| |
Collapse
|
10
|
Johnson JL, Raghavan V, Cimmino A, Moeini A, Petrovic AG, Santoro E, Superchi S, Berova N, Evidente A, Polavarapu PL. Absolute configurations of chiral molecules with multiple stereogenic centers without prior knowledge of the relative configurations: A case study of inuloxin C. Chirality 2018; 30:1206-1214. [DOI: 10.1002/chir.23013] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 07/13/2018] [Accepted: 08/10/2018] [Indexed: 12/20/2022]
Affiliation(s)
| | - Vijay Raghavan
- Department of Chemistry Vanderbilt University Nashville TN USA
| | - Alessio Cimmino
- Department of Chemical Science University of Naples Federico II Naples Italy
| | - Arash Moeini
- Department of Chemical Science University of Naples Federico II Naples Italy
| | - Ana G. Petrovic
- Department of Chemistry Columbia University New York NY USA
- Department of Life Sciences New York Institute of Technology New York NY USA
| | - Ernesto Santoro
- Department of Science University of Basilicata Potenza Italy
| | | | - Nina Berova
- Department of Chemistry Columbia University New York NY USA
| | - Antonio Evidente
- Department of Chemical Science University of Naples Federico II Naples Italy
| | | |
Collapse
|
11
|
Castro-Fernández S, Yang R, García AP, Garzón IL, Xu H, Petrovic AG, Alonso-Gómez JL. Frontispiece: Diverse Chiral Scaffolds from Diethynylspiranes: All-Carbon Double Helices and Flexible Shape-Persistent Macrocycles. Chemistry 2017. [DOI: 10.1002/chem.201784963] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Silvia Castro-Fernández
- Departamento de Química Orgánica; Universidade de Vigo; Lagoas-Marcosende s/n Vigo 36310 Spain
| | - Ren Yang
- College of Chemistry and Chemical Engineering; Central South University; 932 Lushan S Rd, Yuelu, Changsha Hunan P. R. China
| | - A. Patricio García
- Instituto de Física; Universidad Nacional Autónoma de México; Apartado Postal 20-364 01000 México, D. F. México
| | - Ignacio L. Garzón
- Instituto de Física; Universidad Nacional Autónoma de México; Apartado Postal 20-364 01000 México, D. F. México
| | - Hai Xu
- College of Chemistry and Chemical Engineering; Central South University; 932 Lushan S Rd, Yuelu, Changsha Hunan P. R. China
| | - Ana G. Petrovic
- Department of Life Sciences; New York Institute of Technology; 1855 Broadway New York NY 10023 USA
| | - J. Lorenzo Alonso-Gómez
- Departamento de Química Orgánica; Universidade de Vigo; Lagoas-Marcosende s/n Vigo 36310 Spain
| |
Collapse
|
12
|
Castro-Fernández S, Yang R, García AP, Garzón IL, Xu H, Petrovic AG, Alonso-Gómez JL. Diverse Chiral Scaffolds from Diethynylspiranes: All-Carbon Double Helices and Flexible Shape-Persistent Macrocycles. Chemistry 2017; 23:11747-11751. [DOI: 10.1002/chem.201702986] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Silvia Castro-Fernández
- Departamento de Química Orgánica; Universidade de Vigo; Lagoas-Marcosende s/n Vigo 36310 Spain
| | - Ren Yang
- College of Chemistry and Chemical Engineering; Central South University; 932 Lushan S Rd, Yuelu, Changsha Hunan P. R. China
| | - A. Patricio García
- Instituto de Física; Universidad Nacional Autónoma de México; Apartado Postal 20-364 01000 México, D. F. México
| | - Ignacio L. Garzón
- Instituto de Física; Universidad Nacional Autónoma de México; Apartado Postal 20-364 01000 México, D. F. México
| | - Hai Xu
- College of Chemistry and Chemical Engineering; Central South University; 932 Lushan S Rd, Yuelu, Changsha Hunan P. R. China
| | - Ana G. Petrovic
- Department of Life Sciences; New York Institute of Technology; 1855 Broadway New York NY 10023 USA
| | - J. Lorenzo Alonso-Gómez
- Departamento de Química Orgánica; Universidade de Vigo; Lagoas-Marcosende s/n Vigo 36310 Spain
| |
Collapse
|
13
|
Saha B, Ikbal SA, Petrovic AG, Berova N, Rath SP. Complexation of Chiral Zinc-Porphyrin Tweezer with Achiral Diamines: Induction and Two-Step Inversion of Interporphyrin Helicity Monitored by ECD. Inorg Chem 2017; 56:3849-3860. [DOI: 10.1021/acs.inorgchem.6b02686] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bapan Saha
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Sk Asif Ikbal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Ana G. Petrovic
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
- Department of Life Sciences, New York Institute of Technology, 1855 Broadway, New York, New York 10023, United States
| | - Nina Berova
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| |
Collapse
|
14
|
Gliemann BD, Petrovic AG, Zolnhofer EM, Dral PO, Hampel F, Breitenbruch G, Schulze P, Raghavan V, Meyer K, Polavarapu PL, Berova N, Kivala M. Configurationally Stable Chiral Dithia-Bridged Hetero[4]helicene Radical Cation: Electronic Structure and Absolute Configuration. Chem Asian J 2016; 12:31-35. [DOI: 10.1002/asia.201601452] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 11/20/2016] [Indexed: 01/26/2023]
Affiliation(s)
- Bettina D. Gliemann
- Chair of Organic Chemistry I; Department of Chemistry and Pharmacy; Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen; Germany
| | - Ana G. Petrovic
- Department of Life Sciences; New York Institute of Technology, 1855 Broadway, New York; NY, 10023 USA
- Department of Chemistry; Columbia University, 3000 Broadway, New York; NY, 10027 USA
| | - Eva M. Zolnhofer
- Chair of General and Inorganic Chemistry; Department of Chemistry and Pharmacy; Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen; Germany
| | - Pavlo O. Dral
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr; Germany
| | - Frank Hampel
- Chair of Organic Chemistry I; Department of Chemistry and Pharmacy; Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen; Germany
| | - Georg Breitenbruch
- Department of Chromatography and Electrophoresis; Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr; Germany
| | - Philipp Schulze
- Department of Chromatography and Electrophoresis; Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr; Germany
| | - Vijay Raghavan
- Department of Chemistry; Vanderbilt University; TN, 37235 USA 7330 Stevenson Center Station B 351822 Nashville
| | - Karsten Meyer
- Chair of General and Inorganic Chemistry; Department of Chemistry and Pharmacy; Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen; Germany
| | - Prasad L. Polavarapu
- Department of Chemistry; Vanderbilt University; TN, 37235 USA 7330 Stevenson Center Station B 351822 Nashville
| | - Nina Berova
- Department of Chemistry; Columbia University, 3000 Broadway, New York; NY, 10027 USA
| | - Milan Kivala
- Chair of Organic Chemistry I; Department of Chemistry and Pharmacy; Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen; Germany
| |
Collapse
|
15
|
Evidente M, Santoro E, Petrovic AG, Cimmino A, Koshoubu J, Evidente A, Berova N, Superchi S. Absolute configurations of phytotoxic inuloxins B and C based on experimental and computational analysis of chiroptical properties. Phytochemistry 2016; 130:328-34. [PMID: 27498046 DOI: 10.1016/j.phytochem.2016.07.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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: 12/23/2015] [Revised: 07/03/2016] [Accepted: 07/20/2016] [Indexed: 05/23/2023]
Abstract
The absolute configuration of phytotoxins inuloxins B and C, produced by Inula viscosa, and with potential herbicidal activity for the management of parasitic plants, has been determined by Time-dependent density functional theory computational prediction of electronic circular dichroism and optical rotatory dispersion spectra. The inuloxin B has been converted to its 5-O-acetyl derivative, which due to its more constrained conformational features facilitated the computational analysis of its chiroptical properties. The analysis based on experimental and computed data led to assignment of absolute configuration to naturally occurring (+)-inuloxin B and (-)-inuloxin C as (7R,8R,10S,11S) and (5S,7S,8S,10S), respectively.
Collapse
Affiliation(s)
- Marco Evidente
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126, Napoli, Italy; Department of Chemistry, Columbia University, 3000 Broadway, 3114, New York, NY 10027, USA
| | - Ernesto Santoro
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Ana G Petrovic
- Department of Chemistry, Columbia University, 3000 Broadway, 3114, New York, NY 10027, USA; Department of Life Sciences, New York Institute of Technology (NYIT), 1855 Broadway, New York, NY 10023, USA
| | - Alessio Cimmino
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126, Napoli, Italy
| | - Jun Koshoubu
- JASCO Corporation, Hachioji-shi, Tokyo 192-8537, Japan
| | - Antonio Evidente
- Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126, Napoli, Italy.
| | - Nina Berova
- Department of Chemistry, Columbia University, 3000 Broadway, 3114, New York, NY 10027, USA.
| | - Stefano Superchi
- Department of Sciences, University of Basilicata, Via dell'Ateneo Lucano 10, 85100 Potenza, Italy.
| |
Collapse
|
16
|
Accetta A, Petrovic AG, Marchelli R, Berova N, Corradini R. Structural Studies on Porphyrin-PNA Conjugates in Parallel PNA:PNA Duplexes: Effect of Stacking Interactions on Helicity. Chirality 2015; 27:864-74. [PMID: 26412743 DOI: 10.1002/chir.22521] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 08/04/2015] [Accepted: 08/06/2015] [Indexed: 02/01/2023]
Abstract
Parallel PNA:PNA duplexes were synthesized and conjugated with meso-tris(pyridyl)phenylporphyrin carboxylic acid at the N-terminus. The introduction of one porphyrin unit was shown to affect slightly the stability of the PNA:PNA parallel duplex, whereas the presence of two porphyrin units at the same end resulted in a dramatic increase of the melting temperature, accompanied by hysteresis between melting and cooling curves. The circular dichroism (CD) profile of the Soret band and fluorescence quenching strongly support the occurrence of a face-to-face interaction between the two porphyrin units. Introduction of a L-lysine residue at the C-terminal of one strand of the parallel duplex induced a left-handed helical structure in the PNA:PNA duplex if the latter contains only one or no porphyrin moiety. The left-handed helicity was revealed by nucleobase CD profile at 240-280 nm and by the induced-CD observed in the presence of the DiSC2 (5) cyanine dye at ~500-550 nm. Surprisingly, the presence of two porphyrin units led to the disappearance of the nucleobase CD signal and the absence of CD exciton coupling within the Soret band region. In addition, a dramatic decrease of induced CD of DiSC2 (5) was observed. These results are in agreement with a model where the porphyrin-porphyrin interactions cause partial loss of chirality of the PNA:PNA parallel duplex, forcing it to adopt a ladder-like conformation.
Collapse
Affiliation(s)
- Alessandro Accetta
- Department of Chemistry, University of Parma, Parma, Italy.,Department of Chemistry, Columbia University, New York, New York, USA
| | - Ana G Petrovic
- Department of Chemistry, Columbia University, New York, New York, USA.,Department of Life Sciences, New York Institute of Technology (NYIT), New York, New York, USA
| | | | - Nina Berova
- Department of Chemistry, Columbia University, New York, New York, USA
| | | |
Collapse
|
17
|
Santoro E, Mazzeo G, Petrovic AG, Cimmino A, Koshoubu J, Evidente A, Berova N, Superchi S. Absolute configurations of phytotoxins seiricardine A and inuloxin A obtained by chiroptical studies. Phytochemistry 2015; 116:359-366. [PMID: 25817835 DOI: 10.1016/j.phytochem.2015.03.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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: 11/25/2014] [Revised: 03/01/2015] [Accepted: 03/03/2015] [Indexed: 05/23/2023]
Abstract
The absolute configuration (AC) of the plant phytotoxin inuloxin A, produced by Inula viscosa, and of the fungal phytotoxin seiricardine A, obtained from Seiridium fungi, pathogen for cypress, has been determined by experimental measurements and theoretical simulations of chiroptical properties of three related methods, namely, Optical Rotatory Dispersion (ORD), Electronic Circular Dichroism (ECD), and Vibrational Circular Dichroism (VCD). Computational prediction by Density Functional Theory (DFT) of VCD spectra and by Time-dependent DFT (TDDFT) of ORD and ECD spectra allowed to assign (7R,8R,10S) AC to naturally occurring (+)-inuloxin A. In the case of compound (-)-seiricardine A, which lacks useful for the analysis UV-Vis absorption, and thus provides a hardly detectable ECD spectrum and quite low ORD values, an introduction of a suitable chromophore by chemical derivatization was performed. The corresponding derivative, 2-O-p-bromobenzoate ester, gave rise to an intense ECD spectrum and higher ORD and VCD values. The comparison of computed spectra with the experimental ones allowed to assign (1S,2R,3aS,4S,5R,7aS) AC to (-)-2-O-p-bromobenzoate ester of seiricardine A and then to (-)-seiricardine A. This study further supports a recent trend of concerted application of more than a single chiroptical technique toward an unambiguous assignment of AC of flexible and complex natural products. Moreover, the use of chemical derivatization, with insertion of suitable chromophoric moieties has allowed to treat also UV-Vis transparent molecules by ECD and ORD spectroscopies.
Collapse
Affiliation(s)
- Ernesto Santoro
- Dipartimento di Scienze, Università della Basilicata, via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Ana G Petrovic
- Department of Life Sciences, New York Institute of Technology (NYIT), 1855 Broadway, New York, NY 10023, USA
| | - Alessio Cimmino
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Jun Koshoubu
- JASCO Corporation, Hachioji-shi, Tokyo 192-8537, Japan
| | - Antonio Evidente
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy.
| | - Nina Berova
- Department of Chemistry, Columbia University, 3000 Broadway, 3114, New York, NY 10027, USA.
| | - Stefano Superchi
- Dipartimento di Scienze, Università della Basilicata, via dell'Ateneo Lucano 10, 85100 Potenza, Italy.
| |
Collapse
|
18
|
Iwahana S, Iida H, Yashima E, Pescitelli G, Di Bari L, Petrovic AG, Berova N. Absolute Stereochemistry of a 4 a-Hydroxyriboflavin Analogue of the Key Intermediate of the FAD-Monooxygenase Cycle. Chemistry 2014; 20:4386-95. [DOI: 10.1002/chem.201304393] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Indexed: 11/10/2022]
|
19
|
Mazzeo G, Santoro E, Andolfi A, Cimmino A, Troselj P, Petrovic AG, Superchi S, Evidente A, Berova N. Absolute configurations of fungal and plant metabolites by chiroptical methods. ORD, ECD, and VCD studies on phyllostin, scytolide, and oxysporone. J Nat Prod 2013; 76:588-99. [PMID: 23427901 DOI: 10.1021/np300770s] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The absolute configuration (AC) of the bioactive metabolites phyllostin (1) and scytolide (2), two hexahydro-1,4-benzodioxines produced by Phyllosticta cirsii, and oxysporone (3), a dihydrofuropyranone recently isolated from a strain of Diplodia africana, has been assigned by computational analysis of their optical rotatory dispersion (ORD), electronic circular dichroism (ECD), and vibrational circular dichroism (VCD) spectra. Computational prediction of ORD, ECD, and VCD allowed us to assign (3S,4aR,8S,8aR) AC to naturally occurring (-)-1, while (4aR,8S,8aR) AC was assigned to (-)-2 employing only ECD and VCD, because in this case ORD analysis turned out to be unsuitable for AC assignment. Theoretical prediction of both ORD and ECD spectra of 3 led to assignment of (4S,5R,6R) AC to (+)-3. In this case a satisfactory agreement between experimental and calculated VCD spectra was obtained only after taking into account solvent effects. This study shows that in the case of flexible and complex natural products only a concerted application of more than a single chiroptical technique permits unambiguous assignment of absolute configuration.
Collapse
Affiliation(s)
- Giuseppe Mazzeo
- Dipartimento di Scienze, Università della Basilicata, Via dell'Ateneo Lucano, 10, 85100 Potenza, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Petrovic AG, Vantomme G, Negrón-Abril YL, Lubian E, Saielli G, Menegazzo I, Cordero R, Proni G, Nakanishi K, Carofiglio T, Berova N. Bulky melamine-based Zn-porphyrin tweezer as a CD probe of molecular chirality. Chirality 2011; 23:808-19. [DOI: 10.1002/chir.21001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2011] [Accepted: 06/21/2011] [Indexed: 11/11/2022]
|
21
|
Kpegba K, Agbonon A, Petrovic AG, Amouzou E, Gbeassor M, Proni G, Nesnas N. Epiafzelechin from the root bark of Cassia sieberiana: detection by DART mass spectrometry, spectroscopic characterization, and antioxidant properties. J Nat Prod 2011; 74:455-459. [PMID: 21070009 DOI: 10.1021/np100090e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The root bark of Cassia sieberiana was analyzed using direct analysis in real time mass spectrometry, and a main flavonoid component with an [M + H](+) mass of 275 was identified. The flavonoid, epiafzelechin, was isolated and fully characterized with the concerted use of NMR spectroscopy, circular dichroism, and optical rotation. Electronic circular dichroism and optical rotation TDDFT calculations were also performed, and their agreement with the experimental results confirmed the enantiomeric identity of the isolated natural product. The antioxidant activity of the compound was also investigated.
Collapse
Affiliation(s)
- Kafui Kpegba
- Bioorganic Laboratory, Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, United States
| | | | | | | | | | | | | |
Collapse
|
22
|
G. Petrovic A, Navarro-Vazquez A, Lorenzo Alonso-Gomez J. From Relative to Absolute Configuration of Complex Natural Products: Interplay Between NMR, ECD, VCD, and ORD Assisted by ab initio Calculations. CURR ORG CHEM 2010. [DOI: 10.2174/138527210793563215] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
23
|
Kraszewska A, Rivera-Fuentes P, Rapenne G, Crassous J, Petrovic AG, Alonso-Gómez JL, Huerta E, Diederich F, Thilgen C. Regioselectivity in Tether-Directed Remote Functionalization - The Addition of a Cyclotriveratrylene-Based Trimalonate to C60 Revisited. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000396] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
24
|
Buschhaus B, Convertino V, Rivera-Fuentes P, Alonso-Gómez JL, Petrovic AG, Diederich F. Optically Active Trialkynyl(phenyl)methane: Synthesis and Determination of Its Absolute Configuration by Vibrational Circular Dichroism (VCD) and Optical Rotatory Dispersion (ORD). European J Org Chem 2010. [DOI: 10.1002/ejoc.201000076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
25
|
Mammana A, Pescitelli G, Asakawa T, Jockusch S, Petrovic AG, Monaco RR, Purrello R, Turro NJ, Nakanishi K, Ellestad GA, Balaz M, Berova N. Role of environmental factors on the structure and spectroscopic response of 5'-DNA-porphyrin conjugates caused by changes in the porphyrin-porphyrin interactions. Chemistry 2010; 15:11853-66. [PMID: 19844929 DOI: 10.1002/chem.200902029] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We have explored the utility, strength, and limitation of through-space exciton-coupled circular dichroism in determination of the secondary structure of optically active chromophoric nanoarrays using the example of end-capped porphyrin- and metalloporphyrin-oligodeoxynucleotide conjugates. We put special emphasis on the explanation of the origin and significance of the distinctive multiple bands in the CD spectra (trisignate and tetrasignate CD bands). Such CD profiles are often observed in chiral aggregates or multichromophoric arrays but have never before been studied in detail. We found that variation of temperature and ionic strength has a profound effect on the geometry of the porphyrin-DNA conjugates and thus the nature of electronic interactions. At lower temperatures and in the absence of NaCl all three 5'-DNA-porphyrin conjugates display negative bisignate CD exciton couplets of variable intensity in the Soret region resulting from through-space interaction between the electric transition dipole moments of the two end-capped porphyrins. As the temperature is raised these exciton couplets are transformed into single positive bands originating from the porphyrin-single-strand DNA interactions. At higher ionic strengths and low temperatures, multisignate CD bands are observed in the porphyrin Soret region. These CD signature bands originate from a combination of intermolecular, end-to-end porphyrin-porphyrin stacking between duplexes and porphyrin-DNA interactions. The intermolecular aggregation was confirmed by fluorescence and absorption spectroscopy and resonance light scattering. DeVoe theoretical CD calculations, in conjunction with molecular dynamics simulations and Monte Carlo conformational searches, were used to mimic the observed bisignate exciton-coupled CD spectra as well as multiple CD bands. Calculations correctly predicted the sign and shape of the experimentally observed CD spectra. These studies reveal that the exciton-coupled circular dichroism is a very useful technique for the determination of the structure of optically active arrays.
Collapse
Affiliation(s)
- Angela Mammana
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY 10027, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Petrovic AG, Chen Y, Pescitelli G, Berova N, Proni G. CD-sensitive Zn-porphyrin tweezer host-guest complexes, part 1: MC/OPLS-2005 computational approach for predicting preferred interporphyrin helicity. Chirality 2010; 22:129-39. [DOI: 10.1002/chir.20717] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
27
|
Chen Y, Petrovic AG, Roje M, Pescitelli G, Kayser MM, Yang Y, Berova N, Proni G. CD-sensitive Zn-porphyrin tweezer host-guest complexes, part 2:Cis-andtrans-3-hydroxy-4-aryl/alkyl-β-lactams. A case study. Chirality 2010; 22:140-52. [DOI: 10.1002/chir.20718] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
28
|
Polavarapu PL, Petrovic AG, Vick SE, Wulff WD, Ren H, Ding Z, Staples RJ. Absolute Configuration of 3,3′-Diphenyl-[2,2′-binaphthalene]-1,1′-diol Revisited. J Org Chem 2009; 74:5451-7. [DOI: 10.1021/jo901013z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ana G. Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | - Sarah E. Vick
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | - William D. Wulff
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
| | - Hong Ren
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
| | - Zhensheng Ding
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
| | - Richard J. Staples
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
| |
Collapse
|
29
|
Petrovic AG, Polavarapu PL, Mahalakshmi R, Balaram P. Characterization of folded conformations in a tetrapeptide containing two tryptophan residues by vibrational circular dichroism. Chirality 2009; 21 Suppl 1:E76-85. [DOI: 10.1002/chir.20779] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
30
|
Berova N, Pescitelli G, Petrovic AG, Proni G. Probing molecular chirality by CD-sensitive dimeric metalloporphyrin hosts. Chem Commun (Camb) 2009:5958-80. [DOI: 10.1039/b909582a] [Citation(s) in RCA: 157] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
He J, Petrovic AG, Dzyuba SV, Berova N, Nakanishi K, Polavarapu PL. Spectroscopic investigation of Ginkgo biloba terpene trilactones and their interaction with amyloid peptide Abeta(25-35). Spectrochim Acta A Mol Biomol Spectrosc 2008; 69:1213-22. [PMID: 17693130 DOI: 10.1016/j.saa.2007.06.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2006] [Revised: 04/10/2007] [Accepted: 06/01/2007] [Indexed: 05/16/2023]
Abstract
The beneficial effects of Ginkgo biloba extract in the "treatment" of dementia are attributed to its terpene trilactone (TTL) constituents. The interactions between TTLs and amyloid peptide are believed to be responsible in preventing the aggregation of peptide. These interactions have been investigated using infrared vibrational absorption (VA) and circular dichroism (VCD) spectra. Four TTLs, namely ginkgolide A (GA), ginkgolide B (GB), ginkgolide C (GC) and bilobalide (BB) and amyloid Abeta(25-35) peptide, as a model for the full length peptide, are used in this study. GA-monoether and GA-diether have also been synthesized and investigated to help understand the role of individual carbonyl groups in these interactions. The precipitation and solubility issues encountered with the mixture of ginkgolide+Abeta peptide for VA and VCD studies were overcome using binary ethanol-D(2)O solvent mixture. The experimental VA and VCD spectra of GA, GB, GC and BB, GA-monoether and GA-diether have been analyzed using the corresponding spectra predicted with density functional theory. The time-dependent experimental VA and VCD spectra of Abeta(25-35) peptide and the corresponding experimental spectra in the presence of TTLs indicated that the effect of the TTLs in modulating the aggregation of Abeta(25-35) peptide is relatively small. Such small effects might indicate the absence of a specific interaction between the TTLs and Abeta(25-35) peptide as a major force leading to the reduced aggregation of amyloid peptides. It is possible that the therapeutic effect of G. biloba extract does not originate from direct interactions between TTLs and the Abeta(25-35) peptide and is more complex.
Collapse
Affiliation(s)
- Jiangtao He
- Department of Chemistry, Columbia University, New York, NY 10027, USA
| | | | | | | | | | | |
Collapse
|
32
|
Petrovic AG, Polavarapu PL, Drabowicz J, Łyżwa P, Mikołajczyk M, Wieczorek W, Balińska A. Diastereomers of N-α-Phenylethyl-t-butylsulfinamide: Absolute Configurations and Predominant Conformations. J Org Chem 2008; 73:3120-9. [DOI: 10.1021/jo702544g] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana G. Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 93-236 Lodz, Poland, Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Zeromskiego 116, Poland, Jan Długosz University, Institute of Chemistry and Environmental Protection, al. Armii Krajowej 13/15, 42-201 Czȩstochowa, Poland
| | - Prasad L. Polavarapu
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 93-236 Lodz, Poland, Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Zeromskiego 116, Poland, Jan Długosz University, Institute of Chemistry and Environmental Protection, al. Armii Krajowej 13/15, 42-201 Czȩstochowa, Poland
| | - Jozef Drabowicz
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 93-236 Lodz, Poland, Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Zeromskiego 116, Poland, Jan Długosz University, Institute of Chemistry and Environmental Protection, al. Armii Krajowej 13/15, 42-201 Czȩstochowa, Poland
| | - Piotr Łyżwa
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 93-236 Lodz, Poland, Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Zeromskiego 116, Poland, Jan Długosz University, Institute of Chemistry and Environmental Protection, al. Armii Krajowej 13/15, 42-201 Czȩstochowa, Poland
| | - Marian Mikołajczyk
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 93-236 Lodz, Poland, Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Zeromskiego 116, Poland, Jan Długosz University, Institute of Chemistry and Environmental Protection, al. Armii Krajowej 13/15, 42-201 Czȩstochowa, Poland
| | - Wanda Wieczorek
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 93-236 Lodz, Poland, Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Zeromskiego 116, Poland, Jan Długosz University, Institute of Chemistry and Environmental Protection, al. Armii Krajowej 13/15, 42-201 Czȩstochowa, Poland
| | - Agnieszka Balińska
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 93-236 Lodz, Poland, Institute of General and Ecological Chemistry, Technical University of Lodz, 90-924, Lodz, Zeromskiego 116, Poland, Jan Długosz University, Institute of Chemistry and Environmental Protection, al. Armii Krajowej 13/15, 42-201 Czȩstochowa, Poland
| |
Collapse
|
33
|
Petrovic AG, Polavarapu PL. Quadruplex structure of polyriboinosinic acid: dependence on alkali metal ion concentration, pH and temperature. J Phys Chem B 2008; 112:2255-60. [PMID: 18225882 DOI: 10.1021/jp075873v] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The vibrational infrared (IR) absorption and vibrational circular dichroism (VCD) spectral changes of polyinosinic acid (polyI) as a function of alkali metal ion concentration, temperature and pH have been investigated to establish how changes in spectral features relate to the structural modifications of polyI. A single positive VCD couplet associated with the carbonyl absorption band is considered to be the signature of quadruplex structure for polyI. The disruption of the quadruplex structure with temperature increase or pH increase at low alkali metal ion concentration is evidenced by the disappearance of this positive VCD couplet. The absence of any VCD signal upon quadruplex disruption indicates that the newly formed structure lacks helical chirality and is likely to be disordered. In the presence of 1 M NaCl or 0.1 M NaCl, the heat-induced quadruplex disruption is completely reversible. A mildly alkaline environment, in the presence of 0.1 M NaCl, is not sufficient to support the quadruplex structure of polyI. Trehalose-assisted polyI film at room temperature exhibits the same quadruplex spectral signature as that seen for solution at room temperature, but the quadruplex spectral signature in the film state remains at higher temperature, unlike in solution. This indicates that the quadruplex structure of polyI in the film state resists heat-induced disruptions.
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | | |
Collapse
|
34
|
Abstract
The vibrational infrared (IR) absorption and vibrational circular dichroism (VCD) spectral changes of polyriboguanylic acid (polyG) as a function of time, temperature and pH have been investigated to establish how changes in spectral features relate to the structural modifications of polyG. From the progression of IR and VCD spectral features with respect to time, it is observed that stabilization of the quadruplex structure at pH 6.4 (near-neutral environment) takes place within 5 days. This stabilization process is most clearly evidenced by a downshift of the carbonyl absorption band and the corresponding positive VCD couplet, from 1689 to approximately 1682 cm(-1) in time. Time-induced spectral modifications also indicated that, in an acidic environment (pH 3.1) and within a 5 day waiting period, polyG develops a duplex structure. An additional positive VCD couplet associated with an absorption band at 1589 cm(-1) is identified as a marker of the polyG duplex structure. From the progression of spectral features with respect to temperature at pH 6.4, it is found that heating induces structural changes that favor the formation of a duplex structure. This duplex structure, at pH 6.4, would not form at room temperature simply by the passage of time. When polyG is in an acidic environment (pH 3.1), heating accelerates the conversion to the duplex structure that could also be obtained with passage of time at that pH. On the basis of the comparison of experimental and quantum theoretical VCD spectra for polyG, the key spectral signature for the quadruplex form is considered to be a single positive VCD couplet, while the spectral signature for a duplex form is considered to contain an additional positive VCD couplet at a lower frequency.
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | | |
Collapse
|
35
|
Petrovic AG, Vick SE, Polavarapu PL. Determination of the absolute stereochemistry of chiral biphenanthryls in solution phase using chiroptical spectroscopic methods: 2,2′-Diphenyl-[3,3′-biphenanthrene]-4,4′-diol. Chirality 2008; 20:501-10. [DOI: 10.1002/chir.20490] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
36
|
Petrovic AG, Polavarapu PL. Chiroptical Spectroscopic Determination of Molecular Structures of Chiral Sulfinamides: t-Butanesulfinamide. J Phys Chem A 2007; 111:10938-43. [DOI: 10.1021/jp075077p] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ana G. Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | | |
Collapse
|
37
|
Armstrong DW, Cotton FA, Petrovic AG, Polavarapu PL, Warnke MM. Resolution of Enantiomers in Solution and Determination of the Chirality of Extended Metal Atom Chains. Inorg Chem 2007; 46:1535-7. [PMID: 17269764 DOI: 10.1021/ic062263l] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The resolution of enantiomers of extended metal atom chains of the type Ni3[(C5H5N)2N]4Cl2 has been accomplished by chromatographic methods in solution, and the chirality was determined using vibrational circular dichroism, electronic circular dichroism, optical rotatory dispersion, and density functional theory calculations.
Collapse
Affiliation(s)
- Daniel W Armstrong
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, Texas 76019, USA
| | | | | | | | | |
Collapse
|
38
|
Petrovic AG, Polavarapu PL. Structural transitions in polyribocytidylic acid induced by changes in pH and temperature: vibrational circular dichroism study in solution and film states. J Phys Chem B 2007; 110:22826-33. [PMID: 17092034 DOI: 10.1021/jp063221l] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Changes in vibrational absorption and vibrational circular dichroism (VCD) spectra of polyribocytidylic acid (polyC) in buffered D(2)O solution as a function of pH and temperature are reported. Analysis of these spectral data led us to establish the absorption band at approximately 1693 cm(-1) and associated negative VCD couplet as diagnostic markers of the double-helical form of polyC. An alternate interpretation suggesting quadruplex formation for polyC is also discussed. In addition to the solution state spectral data, pH-dependent absorption and VCD spectra for polyC films derived from dilute H(2)O solutions are also presented. The pH-dependent changes in the absorption and VCD spectra of polyC films are found to be similar to those observed for polyC in solution.
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | | |
Collapse
|
39
|
Petrovic AG, Polavarapu PL. Structural transitions in polyriboadenylic acid induced by the changes in pH and temperature: vibrational circular dichroism study in solution and film states. J Phys Chem B 2006; 109:23698-705. [PMID: 16375350 DOI: 10.1021/jp054280m] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A correlation of the changes in vibrational absorption and vibrational circular dichroism (VCD) spectral features with the structural changes of polyriboadenylic acid (polyA) as a function of pH is reported. Analysis of the solution spectral data as a function of pH led us to establishing the importance of a previously unrecognized absorption band at approximately 1665 cm(-1). The present studies indicate that this absorption band and associated VCD originate from the double-helical structure of polyA. The observed changes in solution-state VCD features are indicative of the pH-dependent transitions among the three acidic forms of polyA (A, B, and "frozen" form). In addition to the solution-state spectral data, pH-dependent absorption and VCD spectra for films of polyA, derived from dilute H2O solutions, are also presented. The pH-dependent changes in the absorption and VCD spectra of films are also correlated to the polyA structural changes.
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | | |
Collapse
|
40
|
Polavarapu PL, Petrovic AG, Zhang P. Kramers–Kronig transformation of experimental electronic circular dichroism: Application to the analysis of optical rotatory dispersion in dimethyl-L-tartrate. Chirality 2006; 18:723-32. [PMID: 16856171 DOI: 10.1002/chir.20310] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
When a limited region of the experimental electronic circular dichroism (ECD) spectrum is subjected to Kramers-Kronig (KK) transformation, the resulting optical rotatory dispersion (ORD) may or may not reproduce the experimentally measured ORD in the long-wavelength nonresonant region. If the KK transform of experimentally measured ECD in a limited wavelength region reproduces the experimentally measured ORD in the long-wavelength nonresonant region, then that observation indicates that the ORD in the long-wavelength nonresonant region should be satisfactorily predicted from the correspondingly limited number of electronic transitions in a reliable quantum mechanical calculation. On the other hand, if the KK transform of experimentally measured ECD in a limited region does not reproduce the experimentally measured ORD in the long-wavelength nonresonant region, then it should be possible to identify the ECD bands in the shorter wavelength region that are responsible for the differences between experimentally observed ORD and KK-transformed ECD. This approach helps to identify the role of ECD associated with higher energy-excited states in the nature of ORD in the long-wavelength nonresonant region. These concepts are demonstrated here by measuring the experimental ECD and ORD for dimethyl-L-tartrate in different solvents. While ECD spectra of dimethyl-L-tartrate in different solvents show little variation, ORD spectra in the long-wavelength nonresonant region show marked solvent dependence. These observations are explained using the difference between experimental ORD and KK-transformed ECD. Quantum mechanical predictions of ECD and ORD are also presented for isolated (R, R)-dimethyl tartrate at the B3LYP/aug-cc-pVDZ level.
Collapse
|
41
|
Petrovic AG, Polavarapu PL, Drabowicz J, Zhang Y, McConnell OJ, Duddeck H. Absolute Configuration ofC2-Symmetric Spiroselenurane: 3,3,3′,3′-Tetramethyl-1,1′-spirobi[3H,2,1]Benzoxaselenole. Chemistry 2005; 11:4257-62. [PMID: 15864799 DOI: 10.1002/chem.200401331] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The enantiomers of 3,3,3',3'-tetramethyl-1,1'-spirobi[3 H,2,1]benzoxaselenole have been separated on a chiral preparative chromatographic column. The experimental vibrational circular dichroism (VCD) spectra have been obtained for both enantiomers in CH(2)Cl(2). The theoretical VCD spectra have been obtained by means of density functional theoretical calculations with the B3 LYP density functional. From a comparison of experimental and theoretical VCD spectra, the absolute configuration of an enantiomer with positive specific rotation in CH(2)Cl(2) at 589 nm is determined to be R. This conclusion has been verified by comparing results of experimental optical rotatory dispersion (ORD) and electronic circular dichroism (ECD) to predictions of the same properties using the B3 LYP functional for the title compound.
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
| | | | | | | | | | | |
Collapse
|
42
|
Petrovic AG, He J, Polavarapu PL, Xiao LS, Armstrong DW. Absolute configuration and predominant conformations of 1,1-dimethyl-2-phenylethyl phenyl sulfoxide. Org Biomol Chem 2005; 3:1977-81. [PMID: 15889181 DOI: 10.1039/b501220a] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The absolute configuration of the (+)-1,1-dimethyl-2-phenylethyl phenyl sulfoxide is determined to be (R), using three different chiroptical spectroscopic methods, namely vibrational circular dichroism (VCD), electronic circular dichroism (ECD) and specific rotation. Four solution conformations are identified for 1,1-dimethyl-2-phenylethyl phenyl sulfoxide. In each of the methods used, experimental data for the enantiomers of 1,1-dimethyl-2-phenylethyl phenyl sulfoxide were measured in the solution phase and concomitant quantum mechanical calculations of corresponding properties were carried out using density functional theory with B3LYP functional and 6-31G* and 6-31+G basis sets. Additional VCD and ECD calculations were also undertaken with 6-311G(2d,2p) basis set. A comparison of theoretically predicted data with the corresponding experimental data has allowed us to elucidate the absolute configuration and predominant conformations of (+)-1,1-dimethyl-2-phenylethyl phenyl sulfoxide.
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
| | | | | | | | | |
Collapse
|
43
|
He J, Petrovic AG, Polavarapu PL. Determining the Conformer Populations of (R)-(+)-3-Methylcyclopentanone Using Vibrational Absorption, Vibrational Circular Dichroism, and Specific Rotation. J Phys Chem B 2004. [DOI: 10.1021/jp048117n] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jiangtao He
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | - Ana G. Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | | |
Collapse
|
44
|
Petrovic AG, Bose PK, Polavarapu PL. Vibrational circular dichroism of carbohydrate films formed from aqueous solutions. Carbohydr Res 2004; 339:2713-20. [PMID: 15519330 DOI: 10.1016/j.carres.2004.09.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2004] [Accepted: 09/20/2004] [Indexed: 11/28/2022]
Abstract
Vibrational circular dichroism (VCD) spectra in the entire 2000-900 cm(-1) region have been recorded, for the first time, for films of carbohydrates prepared from aqueous solutions. Eight different carbohydrates, alpha-D-glucopyranosyl-(1-->4)-D-glucose, cyclomaltohexaose, alpha-D-glucopyranosyl alpha-D-glucopyranoside, beta-D-glucopyranosyl-(1-->6)-D-glucose, beta-D-glucopyranosyl-(1-->4)-D-glucose, D-glucose, and both enantiomers of 6-deoxygalactose and of allose, were investigated. The VCD spectra obtained for films are found to be identical to the corresponding spectra obtained for aqueous solutions of carbohydrates. These measurements demonstrate several advantages of significant importance. The strong infrared absorption of water has prevented, in the past, the pursuit for routine applications of VCD in determining the structures of carbohydrates in aqueous solutions. This limitation is not present for film studies because water solvent is removed in the process of preparing the films. Also, strong infrared absorption of water at 1650 cm(-1) requires the use of very short-pathlength (6 microm) cells for measurements on aqueous solutions. This requirement and concomitant inconveniences (such as laborious assembling of a demountable liquid cell or purchasing an expensive variable pathlength liquid cell) have been eliminated for film measurements. The removal of interfering water absorption in film studies resulted in higher light throughput and better signal-to-noise ratios for VCD measurements. Another point of significance is that the amount of carbohydrate sample required for VCD measurements on films is approximately one to two orders of magnitude smaller than that required for corresponding VCD measurements on aqueous solutions. Since carbohydrate samples can now be studied as films, VCD spectroscopy becomes much more broadly applicable for carbohydrates than previously believed. The present work, in combination with other film measurements in our laboratory, indicate that VCD studies on films can be used more generally, providing a convenient and powerful approach for probing structural information for biologically important compounds.
Collapse
Affiliation(s)
- Ana G Petrovic
- Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
| | | | | |
Collapse
|
45
|
Vardimon AD, Graber TM, Stutzmann J, Voss L, Petrovic AG. Reaction of the pterygomaxillary fissure and the condylar cartilage to intermaxillary Class III magnetic mechanics. Am J Orthod Dentofacial Orthop 1994; 105:401-13. [PMID: 8154466 DOI: 10.1016/s0889-5406(94)70135-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The skeletal reaction to Class III intermaxillary magnetic mechanics was previously found to affect two target areas, the pterygomaxillary fissure (PMF) and the condylar cartilage. The objectives of this study were to analyze, radiographically and histologically, the response of these tissues to Class III intermaxillary functional orthopedic magnetic appliance (FOMA III), and to postulate possible models of their dichotomous biomechanism. Nine Macaca fascicularis monkeys received periodic administration of vital bone procion dye and were treated for 4 months with FOMA III (6 subjects) and sham appliance (3 subjects). The PMF (the target area of the midfacial complex) demonstrated a decreased skeletal reaction in inferosuperior and lateromedial directions. Cephalometrically, the lowermost PMF point was displaced inferiorly 1.98 +/- 1.74 mm and 0.42 +/- 0.38 mm and anteriorly 1.42 +/- 0.96 mm and 0.58 +/- 0.38 mm in the treated and control groups, respectively. The displacement of the uppermost PMF point, compared with the lowermost point, was three to five times lower. Histologically, two modes of response were found; first, a sutural response (disarticulation and osteogenesis) of the palatomaxillary and pterygopalatine sutures, which was distinctive of the lateral PMF aspect, and second, a dentosutural response, which was characteristic of the medial PMF aspect (bony microfractures between the third molar germ and the maxillary tuberosity in conjunction with mild sutural response). In the mandible, a discrepancy was found between the histologic and the cephalometric findings. Radiographically, mandibular length was unaffected after 4 months of treatment, and the distance condylion-pogonion was equally increased in the treated (0.75 +/- 0.78 mm) and the control animals (0.77 +/- 0.32 mm). Histologically, however, the condylar cartilage demonstrated increased osteoclastic activity at the zone of endochondral ossification and a decreased apposition rate at the adjacent bony trabeculae. Conceivably, the two target areas (PMF sutures versus condylar cartilage) demonstrate two diverse time-related responses that are either unrelated or interrelated to each other. An unrelated tissue response suggests that tissue stimulation (sutural) is always superior to tissue suppression (condylar). Another possible unrelated tissue reaction implies diverse response velocity (high sutural, low condylar). An interrelated mechanism suggests that an applied force will dissipate initially at the less resistant target area (sutures), and will subsequently affect the more resistant target area (condyle) once the sutural resistance exceeds a certain threshold. The fact that no pathologic change was found in the condylar cartilage encourages a long-term use of the FOMA III appliance, initiating treatment at an early skeletal age.
Collapse
Affiliation(s)
- A D Vardimon
- Section of Orthodontics, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Israel
| | | | | | | | | |
Collapse
|
46
|
Stutzmann JJ, Petrovic AG. Role of the lateral pterygoid muscle and meniscotemporomandibular frenum in spontaneous growth of the mandible and in growth stimulated by the postural hyperpropulsor. Am J Orthod Dentofacial Orthop 1990; 97:381-92. [PMID: 2333852 DOI: 10.1016/0889-5406(90)70110-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Our experimental studies in young rats represent an attempt to elucidate the respective roles of the lateral pterygoid muscle (LPM), the temporomandibular frenum (TMF), and the postural hyperpropulsor (Hp) in the control of the growth rate, the growth direction, and the growth amount of the condylar cartilage. Even after surgical resection of the LPM, the growth of the condylar cartilage and the lengthening of the mandible continue but are significantly decreased. Also, the stimulating effect of postural hyperpropulsion on the condylar cartilage and mandibular growth is much less intense after resection of the LPM. The TMF, which has a blood-circulating and a biomechanical component, appears to be a mediator of the LPM in the control of the condylar cartilage growth. After the surgical resection of the TMF, the growth the condylar cartilage and the lengthening of the mandible continue but are significantly diminished.
Collapse
Affiliation(s)
- J J Stutzmann
- National Institute of Health and Medical Research, INSERM-U.213, Strasbourg, France
| | | |
Collapse
|
47
|
Abstract
A new functional appliance (FA) to correct Class II dentoskeletal malocclusions is introduced. The functional orthopedic magnetic appliance (FOMA) II uses upper and lower attracting magnetic means (Nd2Fe14B) to constrain the lower jaw in an advanced sagittal posture. In vitro, a special gauge transducer measured the magnetic attractive path and forces. In vivo, 13 prepubertal female Macaca fascicularis monkeys received facial implants and were treated for 4 months with the following appliances: conventional FA (four subjects), FOMA II (five subjects), a combined FOMA II + FA (two subjects), and sham (control) appliance (two subjects). The in vitro results showed the following: vertico-sagitally displaced upper and lower magnets attracted ultimately along an oblique line with a terminal horizonal slide to become fully superimposed; the functional performance improved when the magnetic interface acted as a magnetic inclined plane; and the magnetic force was able to guide and constrain the mandible toward the constructive protrusive closure position (CPCP) (1.2 mm, F = 570 gm) from levels below the habitual rest position (3 mm, F = 219 gm) and the electromyographic (EMG) relaxed position (8.5 mm, F = 45 gm). The in vivo results demonstrated the following: functional performance increased in FOMA II (22%) and in the combined FOMA II + FA (28%) over the conventional FA; mandibular length increased significantly in the treated animals (means = 2.83 +/- 0.70 mm) over the control animals (means = 0.43 +/- 0.08 mm); incisor proclination was lower in magnetic appliances (means = 4.57 +/- 1.76 degrees) than in the conventional FA (means = 8.75 +/- 1.85 degrees); mandibular elongation and condylar posterior inclination resulted from posterosuperior endochondral growth (increased cell proliferation and/or hyperplasia of functional chondroblasts) and by bony remodeling of the condylar neck (apposition posterior border, resorption anterior border), respectively; virtually no anterior displacement of the postglenoid spine (means = 0.19 +/- 0.68 mm) nor the articular eminence (means = 0.36 +/- 0.69 mm) was found. Increased lower posterior alveolar height (means = 1.71 +/- 0.82 mm) is a major impediment in the correction of excessive lower anterior facial height. The results of the study highly recommend the exploration of the clinical application of the FOMA II.
Collapse
Affiliation(s)
- A D Vardimon
- American Dental Association, Research Institute/Health Foundation, Chicago, IL 60611
| | | | | | | | | |
Collapse
|
48
|
Petrovic AG, Stutzmann JJ. [Reactive capacity of animal and human condylar cartilage at the cellular and molecular levels in the light of a cybernetic concept of facial growth]. Fortschr Kieferorthop 1988; 49:405-25. [PMID: 3053370 DOI: 10.1007/bf02341231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
49
|
Petrovic AG, Stutzmann JJ, Oudet CL. [Control processes in postnatal growth of mandibular condyle cartilage]. Rev Iberoam Ortod 1986; 6:11-58. [PMID: 3273738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
50
|
Stutzmann JJ, Petrovic AG. Diphosphonates for otospongiosis. Am J Otol 1985; 6:89-95. [PMID: 3156507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|