1
|
Conze C, Trushina NI, Holtmannspötter M, Rierola M, Attanasio S, Bakota L, Piehler J, Brandt R. Super-resolution imaging and quantitative analysis of microtubule arrays in model neurons show that epothilone D increases the density but decreases the length and straightness of microtubules in axon-like processes. Brain Res Bull 2022; 190:234-243. [PMID: 36244582 PMCID: PMC9634454 DOI: 10.1016/j.brainresbull.2022.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 11/29/2022]
Abstract
Microtubules are essential for the development of neurons and the regulation of their structural plasticity. Microtubules also provide the structural basis for the long-distance transport of cargo. Various factors influence the organization and dynamics of neuronal microtubules, and disturbance of microtubule regulation is thought to play a central role in neurodegenerative diseases. However, imaging and quantitative assessment of the microtubule organization in the densely packed neuronal processes is challenging. The development of super-resolution techniques combined with the use of nanobodies offers new possibilities to visualize microtubules in neurites in high resolution. In combination with recently developed computational analysis tools, this allows automated quantification of neuronal microtubule organization with high precision. Here we have implemented three-dimensional DNA-PAINT (Point Accumulation in Nanoscale Topography), a single-molecule localization microscopy (SMLM) technique, which allows us to acquire 3D arrays of the microtubule lattice in axons of model neurons (neuronally differentiated PC12 cells) and dendrites of primary neurons. For the quantitative analysis of the microtubule organization, we used the open-source software package SMLM image filament extractor (SIFNE). We found that treatment with nanomolar concentrations of the microtubule-targeting drug epothilone D (EpoD) increased microtubule density in axon-like processes of model neurons and shifted the microtubule length distribution to shorter ones, with a mean microtubule length of 2.39 µm (without EpoD) and 1.98 µm (with EpoD). We also observed a significant decrease in microtubule straightness after EpoD treatment. The changes in microtubule density were consistent with live-cell imaging measurements of ensemble microtubule dynamics using a previously established Fluorescence Decay After Photoactivation (FDAP) assay. For comparison, we determined the organization of the microtubule array in dendrites of primary hippocampal neurons. We observed that dendritic microtubules have a very similar length distribution and straightness compared to microtubules in axon-like processes of a neuronal cell line. Our data show that super-resolution imaging of microtubules followed by algorithm-based image analysis represents a powerful tool to quantitatively assess changes in microtubule organization in neuronal processes, useful to determine the effect of microtubule-modulating conditions. We also provide evidence that the approach is robust and can be applied to neuronal cell lines or primary neurons, both after incorporation of labeled tubulin and by anti-tubulin antibody staining.
Collapse
Affiliation(s)
- Christian Conze
- Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | | | | | - Marina Rierola
- Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Simone Attanasio
- Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Lidia Bakota
- Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Jacob Piehler
- Center for Cellular Nanoanalytics, Osnabrück University, Osnabrück, Germany; Division of Biophysics, Osnabrück University, Osnabrück, Germany
| | - Roland Brandt
- Department of Neurobiology, Osnabrück University, Osnabrück, Germany; Center for Cellular Nanoanalytics, Osnabrück University, Osnabrück, Germany; Institute of Cognitive Science, Osnabrück University, Osnabrück, Germany.
| |
Collapse
|
2
|
Conze C, Rierola M, Trushina NI, Peters M, Janning D, Holzer M, Heinisch JJ, Arendt T, Bakota L, Brandt R. Caspase-cleaved tau is senescence-associated and induces a toxic gain of function by putting a brake on axonal transport. Mol Psychiatry 2022; 27:3010-3023. [PMID: 35393558 PMCID: PMC9205779 DOI: 10.1038/s41380-022-01538-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 03/15/2022] [Accepted: 03/21/2022] [Indexed: 01/04/2023]
Abstract
The microtubule-associated protein tau plays a central role in tauopathies such as Alzheimer's disease (AD). The exact molecular mechanisms underlying tau toxicity are unclear, but aging is irrefutably the biggest risk factor. This raises the question of how cellular senescence affects the function of tau as a microtubule regulator. Here we report that the proportion of tau that is proteolytically cleaved at the caspase-3 site (TauC3) doubles in the hippocampus of senescent mice. TauC3 is also elevated in AD patients. Through quantitative live-cell imaging, we show that TauC3 has a drastically reduced dynamics of its microtubule interaction. Single-molecule tracking of tau confirmed that TauC3 has a longer residence time on axonal microtubules. The reduced dynamics of the TauC3-microtubule interaction correlated with a decreased transport of mitochondria, a reduced processivity of APP-vesicle transport and an induction of region-specific dendritic atrophy in CA1 neurons of the hippocampus. The microtubule-targeting drug Epothilone D normalized the interaction of TauC3 with microtubules and modulated the transport of APP-vesicles dependent on the presence of overexpressed human tau. The results indicate a novel toxic gain of function, in which a post-translational modification of tau changes the dynamics of the tau-microtubule interaction and thus leads to axonal transport defects and neuronal degeneration. The data also introduce microtubule-targeting drugs as pharmacological modifiers of the tau-microtubule interaction with the potential to restore the physiological interaction of pathologically altered tau with microtubules.
Collapse
Affiliation(s)
- Christian Conze
- grid.10854.380000 0001 0672 4366Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Marina Rierola
- grid.10854.380000 0001 0672 4366Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Nataliya I. Trushina
- grid.10854.380000 0001 0672 4366Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Michael Peters
- grid.10854.380000 0001 0672 4366Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Dennis Janning
- grid.10854.380000 0001 0672 4366Department of Neurobiology, Osnabrück University, Osnabrück, Germany ,grid.10854.380000 0001 0672 4366Center for Cellular Nanoanalytics, Osnabrück University, Osnabrück, Germany
| | - Max Holzer
- grid.9647.c0000 0004 7669 9786Center for Neuropathology and Brain Research, Paul Flechsig Institute of Brain Research, University of Leipzig, Leipzig, Germany
| | - Jürgen J. Heinisch
- grid.10854.380000 0001 0672 4366Department of Genetics, Osnabrück University, Osnabrück, Germany
| | - Thomas Arendt
- grid.9647.c0000 0004 7669 9786Center for Neuropathology and Brain Research, Paul Flechsig Institute of Brain Research, University of Leipzig, Leipzig, Germany
| | - Lidia Bakota
- grid.10854.380000 0001 0672 4366Department of Neurobiology, Osnabrück University, Osnabrück, Germany
| | - Roland Brandt
- Department of Neurobiology, Osnabrück University, Osnabrück, Germany. .,Center for Cellular Nanoanalytics, Osnabrück University, Osnabrück, Germany. .,Institute of Cognitive Science, Osnabrück University, Osnabrück, Germany.
| |
Collapse
|
3
|
Boyde N, Steelman GW, Hanusa TP. Multicomponent Mechanochemical Synthesis of Cyclopentadienyl Titanium tert-Butoxy Halides, Cp x TiX y (O t Bu) 4-(x+y) ( x, y = 1, 2; X = Cl, Br). ACS OMEGA 2018; 3:8149-8159. [PMID: 31458952 PMCID: PMC6644457 DOI: 10.1021/acsomega.8b00943] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/05/2018] [Indexed: 06/10/2023]
Abstract
Titanium tert-butoxy halides of the formula Cp x TiX y (O t Bu)4-(x+y) (x, y = 1, 2; X = Cl, Br) have been prepared thorough milling the reagents without solvent. In the case of the chloride derivatives, Cp2TiCl2 is used as a starting material; in the case of the bromides, a mixture of LiCp, TiBr4, and Li[O t Bu] is used. The stoichiometric ratios of the starting materials are reflected in the major products of the reactions. Single-crystal X-ray structures are reported for Cp2TiCl(O t Bu), Cp2TiBr(O t Bu), and CpTiBr2(O t Bu), as well as for Cp2TiCl(O i Pr) and a redetermination of Cp2TiCl(OMe). The tert-butoxy derivatives are notable for their nearly linear Ti-O-C angles (>170°) that reflect Ti-O π-bonding, an interpretation supported with density functional theory calculations.
Collapse
|
4
|
Allred TK, Manoni F, Harran PG. Exploring the Boundaries of “Practical”: De Novo Syntheses of Complex Natural Product-Based Drug Candidates. Chem Rev 2017; 117:11994-12051. [DOI: 10.1021/acs.chemrev.7b00126] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tyler K. Allred
- Department of Chemistry and
Biochemistry, University of California−Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095-1569, United States
| | - Francesco Manoni
- Department of Chemistry and
Biochemistry, University of California−Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095-1569, United States
| | - Patrick G. Harran
- Department of Chemistry and
Biochemistry, University of California−Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095-1569, United States
| |
Collapse
|
5
|
Feng Y, Liu J, Carrasco YP, MacMillan JB, De Brabander JK. Rifamycin Biosynthetic Congeners: Isolation and Total Synthesis of Rifsaliniketal and Total Synthesis of Salinisporamycin and Saliniketals A and B. J Am Chem Soc 2016; 138:7130-42. [DOI: 10.1021/jacs.6b03248] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yu Feng
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Jun Liu
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Yazmin P. Carrasco
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - John B. MacMillan
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Jef K. De Brabander
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| |
Collapse
|
6
|
Kovalevich J, Cornec AS, Yao Y, James M, Crowe A, Lee VMY, Trojanowski JQ, Smith AB, Ballatore C, Brunden KR. Characterization of Brain-Penetrant Pyrimidine-Containing Molecules with Differential Microtubule-Stabilizing Activities Developed as Potential Therapeutic Agents for Alzheimer's Disease and Related Tauopathies. J Pharmacol Exp Ther 2016; 357:432-50. [PMID: 26980057 DOI: 10.1124/jpet.115.231175] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/14/2016] [Indexed: 01/29/2023] Open
Abstract
The microtubule (MT)-stabilizing protein tau disengages from MTs and forms intracellular inclusions known as neurofibrillary tangles in Alzheimer's disease and related tauopathies. Reduced tau binding to MTs in tauopathies may contribute to neuronal dysfunction through decreased MT stabilization and disrupted axonal transport. Thus, the introduction of brain-penetrant MT-stabilizing compounds might normalize MT dynamics and axonal deficits in these disorders. We previously described a number of phenylpyrimidines and triazolopyrimidines (TPDs) that induce tubulin post-translational modifications indicative of MT stabilization. We now further characterize the biologic properties of these small molecules, and our results reveal that these compounds can be divided into two general classes based on the cellular response they evoke. One group composed of the phenylpyrimidines and several TPD examples showed a bell-shaped concentration-response effect on markers of MT stabilization in cellular assays. Moreover, these compounds induced proteasome-dependent degradation of α- and β-tubulin and caused altered MT morphology in both dividing cells and neuron cultures. In contrast, a second group comprising a subset of TPD molecules (TPD+) increased markers of stable MTs in a concentration-dependent manner in dividing cells and in neurons without affecting total tubulin levels or disrupting MT architecture. Moreover, an example TPD+ compound was shown to increase MTs in a neuron culture model with induced tau hyperphosphorylation and associated MT deficits. Several TPD+ compounds were shown to be both brain penetrant and orally bioavailable, and a TPD+ example increased MT stabilization in the mouse brain, making these compounds potential candidate therapeutics for neurodegenerative tauopathies such as Alzheimer's disease.
Collapse
Affiliation(s)
- Jane Kovalevich
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Anne-Sophie Cornec
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Yuemang Yao
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Michael James
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Alexander Crowe
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Virginia M-Y Lee
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - John Q Trojanowski
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Amos B Smith
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Carlo Ballatore
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| | - Kurt R Brunden
- Center for Neurodegenerative Disease Research, Institute on Aging, University of Pennsylvania, Philadelphia, Pennsylvania (J.K., A.-S.C., Y.Y., M.J., V.M.-Y.L., J.Q.T., C.B., K.R.B.); and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, Pennsylvania (A.-S.C., A.B.S., C.B.)
| |
Collapse
|
7
|
Penazzi L, Tackenberg C, Ghori A, Golovyashkina N, Niewidok B, Selle K, Ballatore C, Smith AB, Bakota L, Brandt R. Aβ-mediated spine changes in the hippocampus are microtubule-dependent and can be reversed by a subnanomolar concentration of the microtubule-stabilizing agent epothilone D. Neuropharmacology 2016; 105:84-95. [PMID: 26772969 DOI: 10.1016/j.neuropharm.2016.01.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 10/10/2015] [Accepted: 01/03/2016] [Indexed: 10/25/2022]
Abstract
Dendritic spines represent the major postsynaptic input of excitatory synapses. Loss of spines and changes in their morphology correlate with cognitive impairment in Alzheimer's disease (AD) and are thought to occur early during pathology. Therapeutic intervention at a preclinical stage of AD to modify spine changes might thus be warranted. To follow the development and to potentially interfere with spine changes over time, we established a long term ex vivo model from organotypic cultures of the hippocampus from APP transgenic and control mice. The cultures exhibit spine loss in principal hippocampal neurons, which closely resembles the changes occurring in vivo, and spine morphology progressively changes from mushroom-shaped to stubby. We demonstrate that spine changes are completely reversed within few days after blocking amyloid-β (Aβ) production with the gamma-secretase inhibitor DAPT. We show that the microtubule disrupting drug nocodazole leads to spine loss similar to Aβ expressing cultures and suppresses DAPT-mediated spine recovery in slices from APP transgenic mice. Finally, we report that epothilone D (EpoD) at a subnanomolar concentration, which slightly stabilizes microtubules in model neurons, completely reverses Aβ-induced spine loss and increases thin spine density. Taken together the data indicate that Aβ causes spine changes by microtubule destabilization and that spine recovery requires microtubule polymerization. Moreover, our results suggest that a low, subtoxic concentration of EpoD is sufficient to reduce spine loss during the preclinical stage of AD.
Collapse
Affiliation(s)
- Lorène Penazzi
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Christian Tackenberg
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Adnan Ghori
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Nataliya Golovyashkina
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Benedikt Niewidok
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Karolin Selle
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Carlo Ballatore
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA 19104, United States; Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Amos B Smith
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Lidia Bakota
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Roland Brandt
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076 Osnabrück, Germany.
| |
Collapse
|
8
|
Delépine C, Meziane H, Nectoux J, Opitz M, Smith AB, Ballatore C, Saillour Y, Bennaceur-Griscelli A, Chang Q, Williams EC, Dahan M, Duboin A, Billuart P, Herault Y, Bienvenu T. Altered microtubule dynamics and vesicular transport in mouse and human MeCP2-deficient astrocytes. Hum Mol Genet 2015; 25:146-57. [PMID: 26604147 DOI: 10.1093/hmg/ddv464] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 11/06/2015] [Indexed: 12/14/2022] Open
Abstract
Rett syndrome (RTT) is a rare X-linked neurodevelopmental disorder, characterized by normal post-natal development followed by a sudden deceleration in brain growth with progressive loss of acquired motor and language skills, stereotypic hand movements and severe cognitive impairment. Mutations in the methyl-CpG-binding protein 2 (MECP2) cause more than 95% of classic cases. Recently, it has been shown that the loss of Mecp2 from glia negatively influences neurons in a non-cell-autonomous fashion, and that in Mecp2-null mice, re-expression of Mecp2 preferentially in astrocytes significantly improved locomotion and anxiety levels, restored respiratory abnormalities to a normal pattern and greatly prolonged lifespan compared with globally null mice. We now report that microtubule (MT)-dependent vesicle transport is altered in Mecp2-deficient astrocytes from newborn Mecp2-deficient mice compared with control wild-type littermates. Similar observation has been made in human MECP2 p.Arg294* iPSC-derived astrocytes. Importantly, administration of Epothilone D, a brain-penetrant MT-stabilizing natural product, was found to restore MT dynamics in Mecp2-deficient astrocytes and in MECP2 p.Arg294* iPSC-derived astrocytes in vitro. Finally, we report that relatively low weekly doses of Epothilone D also partially reversed the impaired exploratory behavior in Mecp2(308/y) male mice. These findings represent a first step toward the validation of an innovative treatment for RTT.
Collapse
Affiliation(s)
- Chloé Delépine
- Inserm, U1016, Institut Cochin, Paris, France, Cnrs, UMR8104, Paris, France, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Hamid Meziane
- Institut Clinique de la Souris (ICS), PHENOMIN, GIE CERBM, Illkirch, France, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France, Centre National de la Recherche Scientifique, UMR7104, Illkirch, France, Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France, Université de Strasbourg, Illkirch, France
| | - Juliette Nectoux
- Inserm, U1016, Institut Cochin, Paris, France, Cnrs, UMR8104, Paris, France, Université Paris Descartes, Sorbonne Paris Cité, Paris, France, Laboratoire de Biologie et Génétique Moléculaires, HUPC, Hôpital Cochin, Paris, France
| | - Matthieu Opitz
- Inserm, U1016, Institut Cochin, Paris, France, Cnrs, UMR8104, Paris, France, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Amos B Smith
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA
| | - Carlo Ballatore
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA, Center of Neurodegenerative Disease Research, University of Pennsylvania, Philadelphia, PA, USA
| | - Yoann Saillour
- Inserm, U1016, Institut Cochin, Paris, France, Cnrs, UMR8104, Paris, France, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | | | - Qiang Chang
- Department of Genetics and Neurology, University of Wisconsin-Madison, Madison, WI, USA
| | | | - Maxime Dahan
- Laboratoire Physico-Chimie Curie, Institut Curie, CNRS UMR168, UPMC, Paris, France and
| | - Aurélien Duboin
- Laboratoire Physico-Chimie Curie, Institut Curie, CNRS UMR168, UPMC, Paris, France and ALVEOLE, Paris, France
| | - Pierre Billuart
- Inserm, U1016, Institut Cochin, Paris, France, Cnrs, UMR8104, Paris, France, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Yann Herault
- Institut Clinique de la Souris (ICS), PHENOMIN, GIE CERBM, Illkirch, France, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France, Centre National de la Recherche Scientifique, UMR7104, Illkirch, France, Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France, Université de Strasbourg, Illkirch, France
| | - Thierry Bienvenu
- Inserm, U1016, Institut Cochin, Paris, France, Cnrs, UMR8104, Paris, France, Université Paris Descartes, Sorbonne Paris Cité, Paris, France, Laboratoire de Biologie et Génétique Moléculaires, HUPC, Hôpital Cochin, Paris, France,
| |
Collapse
|
9
|
Golovyashkina N, Penazzi L, Ballatore C, Smith AB, Bakota L, Brandt R. Region-specific dendritic simplification induced by Aβ, mediated by tau via dysregulation of microtubule dynamics: a mechanistic distinct event from other neurodegenerative processes. Mol Neurodegener 2015; 10:60. [PMID: 26541821 PMCID: PMC4634596 DOI: 10.1186/s13024-015-0049-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 09/28/2015] [Indexed: 12/30/2022] Open
Abstract
Background Dendritic simplification, a key feature of the neurodegenerative triad of Alzheimer’s disease (AD) in addition to spine changes and neuron loss, occurs in a region-specific manner. However, it is unknown how changes in dendritic complexity are mediated and how they relate to spine changes and neuron loss. Results To investigate the mechanisms of dendritic simplification in an authentic CNS environment we employed an ex vivo model, based on targeted expression of enhanced green fluorescent protein (EGFP)-tagged constructs in organotypic hippocampal slices of mice. Algorithm-based 3D reconstruction of whole neuron morphology in different hippocampal regions was performed on slices from APPSDL-transgenic and control animals. We demonstrate that induction of dendritic simplification requires the combined action of amyloid beta (Aβ) and human tau. Simplification is restricted to principal neurons of the CA1 region, recapitulating the region specificity in AD patients, and occurs at sites of Schaffer collateral input. We report that γ-secretase inhibition and treatment with the NMDA-receptor antagonist, CPP, counteract dendritic simplification. The microtubule-stabilizing drug epothilone D (EpoD) induces simplification in control cultures per se. Similar morphological changes were induced by a phosphoblocking tau construct, which also increases microtubule stability. In fact, low nanomolar concentrations of naturally secreted Aβ decreased phosphorylation at S262 in a cellular model, a site which is known to directly modulate tau-microtubule interactions. Conclusions The data provide evidence that dendritic simplification is mechanistically distinct from other neurodegenerative events and involves microtubule stabilization by dendritic tau, which becomes dephosphorylated at certain sites. They imply that treatments leading to an overall decrease of tau phosphorylation might have a negative impact on neuronal connectivity.
Collapse
Affiliation(s)
- Nataliya Golovyashkina
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076, Osnabrück, Germany.
| | - Lorène Penazzi
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076, Osnabrück, Germany.
| | - Carlo Ballatore
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, 19014, USA. .,Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
| | - Amos B Smith
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, 19014, USA.
| | - Lidia Bakota
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076, Osnabrück, Germany.
| | - Roland Brandt
- Department of Neurobiology, University of Osnabrück, Barbarastrasse 11, 49076, Osnabrück, Germany.
| |
Collapse
|
10
|
Stumpp N, Premnath P, Schmidt T, Ammermann J, Dräger G, Reck M, Jansen R, Stiesch M, Wagner-Döbler I, Kirschning A. Synthesis of new carolacton derivatives and their activity against biofilms of oral bacteria. Org Biomol Chem 2015; 13:5765-74. [DOI: 10.1039/c5ob00460h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carolacton, a secondary metabolite isolated from the extracts ofSorangium cellulosum, causes membrane damage and cell death in biofilms of different oral bacteria.
Collapse
Affiliation(s)
- N. Stumpp
- Department of Prosthetic Dentistry and Biomedical Materials Science
- Hannover Medical School
- 30625 Hannover
- Germany
| | - P. Premnath
- Helmholtz-Center for Infection Research
- Department of Microbial Communication
- 38124 Braunschweig
- Germany
| | - T. Schmidt
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - J. Ammermann
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - G. Dräger
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| | - M. Reck
- Helmholtz-Center for Infection Research
- Department of Microbial Communication
- 38124 Braunschweig
- Germany
| | - R. Jansen
- Helmholtz-Center for Infection Research
- Department of Microbial Drugs
- 38124 Braunschweig
- Germany
| | - M. Stiesch
- Department of Prosthetic Dentistry and Biomedical Materials Science
- Hannover Medical School
- 30625 Hannover
- Germany
| | - I. Wagner-Döbler
- Helmholtz-Center for Infection Research
- Department of Microbial Communication
- 38124 Braunschweig
- Germany
| | - A. Kirschning
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ)
- Leibniz Universität Hannover
- 30167 Hannover
- Germany
| |
Collapse
|
11
|
Liu H, Liu Y, Wang Z, Xing X, Maguire AR, Luesch H, Zhang H, Xu Z, Ye T. Total synthesis and biological evaluation of grassypeptolide A. Chemistry 2013; 19:6774-84. [PMID: 23536467 DOI: 10.1002/chem.201203667] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Revised: 02/18/2013] [Indexed: 01/08/2023]
Abstract
Herein, we describe in full our investigations into the synthesis of grassypeptolide A (1) in 17 linear steps with an overall yield of 11.3 %. In particular, this work features the late-stage introduction of sensitive bis(thiazoline) heterocycles and 31-membered macrocyclization conducted at the sterically congested secondary amide site in superb conversion (72 % yield). Biological evaluation indicated that grassypeptolide A significantly inhibited cancer cell proliferation in a dose-dependent manner. It induced cancer cell apoptosis, which was associated with increased cleavage of poly(ADP-ribose) polymerase (PARP) and decreased expression of bcl-2 and bcl-xL. Furthermore, grassypeptolide A also caused cell cycle redistribution by increasing cells in the G1 phase and decreasing cells in the S and G2 phases. In addition, cell cycle arrest was correlated with downregulation of cyclin D and upregulation of p27 and p21.
Collapse
Affiliation(s)
- Hui Liu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Abstract
This article provides an overview on the chemistry and structure-activity relationships of macrolide-based microtubule-stabilizing agents. The primary focus will be on the total synthesis or examples thereof, but a brief summary of the current state of knowledge on the structure-activity relationships of epothilones, laulimalide, dictyostatin, and peloruside A will also be given. This macrolide class of compounds, over the last decade, has become the subject of growing interest due to their ability to inhibit human cancer cell proliferation through a taxol-like mechanism of action.
Collapse
|
13
|
Parenty A, Moreau X, Niel G, Campagne JM. Update 1 of: Macrolactonizations in the Total Synthesis of Natural Products. Chem Rev 2013; 113:PR1-40. [DOI: 10.1021/cr300129n] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- A. Parenty
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
| | - X. Moreau
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Lavoisier de Versailles, UMR CNRS 8180, Université de Versailles-Saint-Quentin-en-Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - Gilles Niel
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
| | - J.-M. Campagne
- Institut de Chimie des Substances
Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
- Institut Charles Gerhardt, UMR5253, Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier, France
| |
Collapse
|
14
|
Ballatore C, Brunden KR, Huryn DM, Trojanowski JQ, Lee VMY, Smith AB. Microtubule stabilizing agents as potential treatment for Alzheimer's disease and related neurodegenerative tauopathies. J Med Chem 2012; 55:8979-96. [PMID: 23020671 PMCID: PMC3493881 DOI: 10.1021/jm301079z] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The microtubule (MT) associated protein tau, which is highly expressed in the axons of neurons, is an endogenous MT-stabilizing agent that plays an important role in axonal transport. Loss of MT-stabilizing tau function, caused by misfolding, hyperphosphorylation, and sequestration of tau into insoluble aggregates, leads to axonal transport deficits with neuropathological consequences. Several in vitro and preclinical in vivo studies have shown that MT-stabilizing drugs can be utilized to compensate for the loss of tau function and to maintain/restore effective axonal transport. These findings indicate that MT-stabilizing compounds hold considerable promise for the treatment of Alzheimer disease and related tauopathies. The present article provides a synopsis of the key findings demonstrating the therapeutic potential of MT-stabilizing drugs in the context of neurodegenerative tauopathies, as well as an overview of the different classes of MT-stabilizing compounds.
Collapse
Affiliation(s)
- Carlo Ballatore
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, 231 South 34 St., Philadelphia, PA 19104-6323
- Center for Neurodegenerative Diseases Research and Institute on Aging, Perelman School of Medicine, University of Pennsylvania, 3600 Spruce Street, Philadelphia, PA 19104-6323
| | - Kurt R. Brunden
- Center for Neurodegenerative Diseases Research and Institute on Aging, Perelman School of Medicine, University of Pennsylvania, 3600 Spruce Street, Philadelphia, PA 19104-6323
| | - Donna M. Huryn
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, 231 South 34 St., Philadelphia, PA 19104-6323
| | - John Q. Trojanowski
- Center for Neurodegenerative Diseases Research and Institute on Aging, Perelman School of Medicine, University of Pennsylvania, 3600 Spruce Street, Philadelphia, PA 19104-6323
| | - Virginia M.-Y. Lee
- Center for Neurodegenerative Diseases Research and Institute on Aging, Perelman School of Medicine, University of Pennsylvania, 3600 Spruce Street, Philadelphia, PA 19104-6323
| | - Amos B. Smith
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, 231 South 34 St., Philadelphia, PA 19104-6323
| |
Collapse
|
15
|
The microtubule-stabilizing agent, epothilone D, reduces axonal dysfunction, neurotoxicity, cognitive deficits, and Alzheimer-like pathology in an interventional study with aged tau transgenic mice. J Neurosci 2012; 32:3601-11. [PMID: 22423084 DOI: 10.1523/jneurosci.4922-11.2012] [Citation(s) in RCA: 276] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Neurodegenerative tauopathies, such as Alzheimer's disease (AD), are characterized by insoluble deposits of hyperphosphorylated tau protein within brain neurons. Increased phosphorylation and decreased solubility has been proposed to diminish normal tau stabilization of microtubules (MTs), thereby leading to neuronal dysfunction. Earlier studies have provided evidence that small molecule MT-stabilizing drugs that are used in the treatment of cancer may have utility in the treatment of tauopathies. However, it has not been established whether treatment with a small molecule MT-stabilizing compound will provide benefit in a transgenic model with pre-existing tau pathology, as would be seen in human patients with clinical symptoms. Accordingly, we describe here an interventional study of the brain-penetrant MT-stabilizing agent, epothilone D (EpoD), in aged PS19 mice with existing tau pathology and related behavioral deficits. EpoD treatment reduced axonal dystrophy and increased axonal MT density in the aged PS19 mice, which led to improved fast axonal transport and cognitive performance. Moreover, the EpoD-treated PS19 mice had less forebrain tau pathology and increased hippocampal neuronal integrity, with no dose-limiting side effects. These data reveal that brain-penetrant MT-stabilizing drugs hold promise for the treatment of AD and related tauopathies, and that EpoD could be a candidate for clinical testing.
Collapse
|
16
|
Schmidt T, Kirschning A. Totalsynthese von Carolacton, einem hochwirksamen Inhibitor von Biofilmen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201106762] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
17
|
Schmidt T, Kirschning A. Total synthesis of carolacton, a highly potent biofilm inhibitor. Angew Chem Int Ed Engl 2011; 51:1063-6. [PMID: 22162345 DOI: 10.1002/anie.201106762] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 10/22/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Thomas Schmidt
- Institut für Organische Chemie und Zntrum für Biomolekulare Wirkstoffe (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | | |
Collapse
|
18
|
Brunden KR, Yao Y, Potuzak JS, Ferrer NI, Ballatore C, James MJ, Hogan AML, Trojanowski JQ, Smith AB, Lee VMY. The characterization of microtubule-stabilizing drugs as possible therapeutic agents for Alzheimer's disease and related tauopathies. Pharmacol Res 2010; 63:341-51. [PMID: 21163349 DOI: 10.1016/j.phrs.2010.12.002] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 12/06/2010] [Accepted: 12/06/2010] [Indexed: 01/03/2023]
Abstract
Tau, a protein that is enriched in neurons of the central nervous system (CNS), is thought to play a critical role in the stabilization of microtubules (MTs). Several neurodegenerative disorders referred to as tauopathies, including Alzheimer's disease and certain types of frontotemporal lobar degeneration, are characterized by the intracellular accumulation of hyperphosphorylated tau fibrils. Tau deposition into insoluble aggregates is believed to result in a loss of tau function that leads to MT destabilization, and this could cause neurodegeneration as intact MTs are required for axonal transport and normal neuron function. This tau loss-of-function hypothesis has been validated in a tau transgenic mouse model with spinal cord tau inclusions, where the MT-stabilizing agent, paclitaxel, increased spinal nerve MT density and improved motor function after drug absorption at neuromuscular junctions. Unfortunately, paclitaxel is a P-glycoprotein substrate and has poor blood-brain barrier permeability, making it unsuitable for the treatment of human tauopathies. We therefore examined several MT-stabilizing compounds from the taxane and epothilone natural product families to assess their membrane permeability and to determine whether they act as substrates or inhibitors of P-glycoprotein. Moreover, we compared brain and plasma levels of the compounds after administration to mice. Finally, we assessed whether brain-penetrant compounds could stabilize mouse CNS MTs. We found that several epothilones have significantly greater brain penetration than the taxanes. Furthermore, certain epothilones cause an increase in CNS MT stabilization, with epothilone D demonstrating a favorable pharmacokinetic and pharmacodynamic profile which suggests this agent merits further study as a potential tauopathy drug candidate.
Collapse
Affiliation(s)
- Kurt R Brunden
- Center for Neurodegenerative Disease Research and Institute on Aging, Department of Pathology and Laboratory Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Epothilone D improves microtubule density, axonal integrity, and cognition in a transgenic mouse model of tauopathy. J Neurosci 2010; 30:13861-6. [PMID: 20943926 DOI: 10.1523/jneurosci.3059-10.2010] [Citation(s) in RCA: 223] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Neurons in the brains of those with Alzheimer's disease (AD) and many frontotemporal dementias (FTDs) contain neurofibrillary tangles comprised of hyperphosphorylated tau protein. Tau normally stabilizes microtubules (MTs), and tau misfolding could lead to a loss of this function with consequent MT destabilization and neuronal dysfunction. Accordingly, a possible therapeutic strategy for AD and related "tauopathies" is treatment with a MT-stabilizing anti-cancer drug such as paclitaxel. However, paclitaxel and related taxanes have poor blood-brain barrier permeability and thus are unsuitable for diseases of the brain. We demonstrate here that the MT-stabilizing agent, epothilone D (EpoD), is brain-penetrant and we subsequently evaluated whether EpoD can compensate for tau loss-of-function in PS19 tau transgenic mice that develop forebrain tau inclusions, axonal degeneration and MT deficits. Treatment of 3-month-old male PS19 mice with low doses of EpoD once weekly for a 3 month period significantly improved CNS MT density and axonal integrity without inducing notable side-effects. Moreover, EpoD treatment reduced cognitive deficits that were observed in the PS19 mice. These results suggest that certain brain-penetrant MT-stabilizing agents might provide a viable therapeutic strategy for the treatment of AD and FTDs.
Collapse
|
20
|
Abstract
The first total synthesis of grassypeptolide, an anticancer cyclodepsipeptide isolated from marine cyanobacteria, has been achieved in 17 steps and an overall 11.3% yield.
Collapse
Affiliation(s)
- Hui Liu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China 518055
| | | | | | | | | |
Collapse
|
21
|
Huang Q, Mao J, Wan B, Wang Y, Brun R, Franzblau SG, Kozikowski AP. Searching for New Cures for Tuberculosis: Design, Synthesis, and Biological Evaluation of 2-Methylbenzothiazoles. J Med Chem 2009; 52:6757-67. [DOI: 10.1021/jm901112f] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qingqing Huang
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Jialin Mao
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Baojie Wan
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Yuehong Wang
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Reto Brun
- Swiss Tropical Institute, Socinstrasse 57, CH-4002 Basel, Switzerland
| | - Scott G. Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Alan P. Kozikowski
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| |
Collapse
|
22
|
Ward DE, Becerril-Jimenez F, Zahedi MM. Rational Design of Aldol Reactions That Proceed via Kinetic Resolution with Switchable Enantioselectivity. J Org Chem 2009; 74:4447-54. [DOI: 10.1021/jo900716a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dale E. Ward
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
| | - Fabiola Becerril-Jimenez
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
| | - M. Mehdi Zahedi
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
| |
Collapse
|
23
|
Lilienkampf A, Mao J, Wan B, Wang Y, Franzblau SG, Kozikowski AP. Structure−Activity Relationships for a Series of Quinoline-Based Compounds Active against Replicating and Nonreplicating Mycobacterium tuberculosis. J Med Chem 2009; 52:2109-18. [DOI: 10.1021/jm900003c] [Citation(s) in RCA: 233] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Annamaria Lilienkampf
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Jialin Mao
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Baojie Wan
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Yuehong Wang
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Scott G. Franzblau
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| | - Alan P. Kozikowski
- Drug Discovery Program, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612, Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612
| |
Collapse
|
24
|
Mulzer J, Prantz K. Total synthesis of epothilones A-F. FORTSCHRITTE DER CHEMIE ORGANISCHER NATURSTOFFE = PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS. PROGRES DANS LA CHIMIE DES SUBSTANCES ORGANIQUES NATURELLES 2009; 90:55-133. [PMID: 19209841 DOI: 10.1007/978-3-211-78207-1_3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- Johann Mulzer
- Institut für Organische Chemie der Universität Wien, Wien, Austria.
| | | |
Collapse
|
25
|
Mulzer J, Altmann KH, Höfle G, Müller R, Prantz K. Epothilones – A fascinating family of microtubule stabilizing antitumor agents. CR CHIM 2008. [DOI: 10.1016/j.crci.2008.02.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
26
|
Díaz-Oltra S, Carda M, Murga J, Falomir E, Marco J. Aldol Reactions between L-Erythrulose Derivatives and Chiral α-Amino and α-Fluoro Aldehydes: Competition between Felkin-Anh and Cornforth Transition States. Chemistry 2008; 14:9240-54. [DOI: 10.1002/chem.200800956] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
27
|
Lebreton S, Jaunbergs J, Roth MG, Ferguson DA, De Brabander JK. Evaluating the potential of vacuolar ATPase inhibitors as anticancer agents and multigram synthesis of the potent salicylihalamide analog saliphenylhalamide. Bioorg Med Chem Lett 2008; 18:5879-83. [PMID: 18657422 DOI: 10.1016/j.bmcl.2008.07.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Revised: 06/26/2008] [Accepted: 07/01/2008] [Indexed: 12/27/2022]
Abstract
The natural product salicylihalamide is a potent inhibitor of the Vacuolar ATPase (V-ATPase), a potential target for antitumor chemotherapy. We generated salicylihalamide-resistant tumor cell lines typified by an overexpansion of lysosomal organelles. We also found that many tumor cell lines upregulate tissue-specific plasmalemmal V-ATPases, and hypothesize that tumors that derive their energy from glycolysis rely on these isoforms to maintain a neutral cytosolic pH. To further validate the potential of V-ATPase inhibitors as leads for cancer chemotherapy, we developed a multigram synthesis of the potent salicylihalamide analog saliphenylhalamide.
Collapse
Affiliation(s)
- Sylvain Lebreton
- Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd., Dallas, TX 75390-9038, USA
| | | | | | | | | |
Collapse
|
28
|
Alhamadsheh MM, Gupta S, Hudson RA, Perera L, Tillekeratne LMV. Total synthesis and selective activity of a new class of conformationally restrained epothilones. Chemistry 2008; 14:570-81. [PMID: 17955508 PMCID: PMC2712887 DOI: 10.1002/chem.200701143] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Stereoselective total syntheses of two novel conformationally restrained epothilone analogues are described. Evans asymmetric alkylation, Brown allylation, and a diastereoselective aldol reaction served as the key steps in the stereoselective synthesis of one of the two key fragments of the convergent synthetic approach. Enzyme resolution was employed to obtain the second fragment as a single enantiomer. The molecules were assembled by esterification, followed by ring-closing metathesis. In preliminary cytotoxicity studies, one of the analogues showed strong and selective growth inhibitory activity against two leukemia cell lines over solid human tumor cell lines. The precise biological mechanism of action and high degree of selectivity of this analogue remain to be examined.
Collapse
Affiliation(s)
- Mamoun M. Alhamadsheh
- Department of Medicinal and Biological Chemistry, College of Pharmacy, The University of Toledo, Toledo, OH 43606 (USA), Fax: (+1)419-530-7946
| | - Shuchi Gupta
- Department of Medicinal and Biological Chemistry, College of Pharmacy, The University of Toledo, Toledo, OH 43606 (USA), Fax: (+1)419-530-7946
| | - Richard A. Hudson
- Department of Medicinal and Biological Chemistry, College of Pharmacy, The University of Toledo, Toledo, OH 43606 (USA), Fax: (+1)419-530-7946
| | - Lalith Perera
- Laboratory of Structural Biology, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709 (USA)
| | - L. M. Viranga Tillekeratne
- Department of Medicinal and Biological Chemistry, College of Pharmacy, The University of Toledo, Toledo, OH 43606 (USA), Fax: (+1)419-530-7946
| |
Collapse
|
29
|
Ley SV, Sheppard TD, Myers RM, Chorghade MS. Chiral Glycolate Equivalents for the Asymmetric Synthesis of α-Hydroxycarbonyl Compounds. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1451] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
30
|
Abstract
The aldol reaction is one of the most important methods for the stereoselective construction of polyketide natural products, not only for nature but also for synthetic chemistry. The tremendous development in the field of aldol additions during the last 30 years has led to more and more total syntheses of complicated natural products. This Review illustrates by means of selected syntheses of natural products the new variants of the aldol addition. This includes aldol additions with various metal enolates, as well as metal-complex-catalyzed, organocatalytic, and biocatalytic methods.
Collapse
Affiliation(s)
- Bernd Schetter
- Chemisches Institut, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | | |
Collapse
|
31
|
|
32
|
Parenty A, Moreau X, Campagne JM. Macrolactonizations in the total synthesis of natural products. Chem Rev 2006; 106:911-39. [PMID: 16522013 DOI: 10.1021/cr0301402] [Citation(s) in RCA: 383] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A Parenty
- Institut de Chimie des Substances Naturelles, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
| | | | | |
Collapse
|
33
|
Wang JX, Zhang CX, Li Y, You QD. The First Total Synthesis of the Diastereoisomers A and B of Tuxpanolidefrom Perymenium hintonii. J CHIN CHEM SOC-TAIP 2006. [DOI: 10.1002/jccs.200600044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
34
|
Quintard D, Bertrand P, Bachmann C, Gesson JP. Synthesis and Conformational Analysis of Macrocycles Related to 10-Oxa-epothilone. European J Org Chem 2004. [DOI: 10.1002/ejoc.200400212] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Taylor RE, Chen Y, Galvin GM, Pabba PK. Conformation–activity relationships in polyketide natural products. Towards the biologically active conformation of epothilone. Org Biomol Chem 2004; 2:127-32. [PMID: 14737671 DOI: 10.1039/b312213c] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conformation-activity relationships for the biologically active polyketide, epothilone, have been determined. Computer-based molecular modeling and high field NMR techniques have provided the solution preferences for epothilones and. For the C1-C8 polypropionate region, two conformational families, conformers 1 and 2, have been identified as having significant populations in polar and non-polar solvents. In the C11-C15 region, additional flexibility was observed and two local conformations have been identified as important, conformers 3 and 4. Epothilone analogues with altered conformational profiles have been designed and synthesized. Conformational analysis and the results of biological assays have been correlated to provide increased understanding of the biologically active conformation for the epothilone class of natural product. Conformation-activity relationships have been shown to be an important complement to structure-activity data.
Collapse
Affiliation(s)
- Richard E Taylor
- Department of Chemistry & Biochemistry and the Walther Cancer Research Center, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN, 46556-5670, USA.
| | | | | | | |
Collapse
|
36
|
Rivkin A, Yoshimura F, Gabarda AE, Chou TC, Dong H, Tong WP, Danishefsky SJ. Complex target-oriented total synthesis in the drug discovery process: the discovery of a highly promising family of second generation epothilones. J Am Chem Soc 2003; 125:2899-901. [PMID: 12617656 DOI: 10.1021/ja029695p] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The total synthesis of a family of (E)-9,10-dehydro derivatives of epothilone D (i.e., 12,13-desoxyepothilone B) is described. The route is particularly concise and amenable to production of new congeners. Furthermore, the chemistry described herein constitutes a major simplification in the total synthesis of EpoD, which is in human clinical trials. This new family of epothilones shows major advantages in terms of their potency and pharmacostability relative to the wild-type saturated analogues in the D series. From the perspective of compound availability through synthesis, potency, and pharmacokinetic properties, these compounds could well warrant advancement to clinical evaluation in humans.
Collapse
Affiliation(s)
- Alexey Rivkin
- Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, New York 10021, USA
| | | | | | | | | | | | | |
Collapse
|
37
|
Akbutina FA, Sadretdinov IF, Selezneva NK, Miftakhov MS. Chiral synthetic block based on (R)-pantolactone. MENDELEEV COMMUNICATIONS 2003. [DOI: 10.1070/mc2003v013n03abeh001755] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
38
|
Biswas K, Lin H, Njardarson JT, Chappell MD, Chou TC, Guan Y, Tong WP, He L, Horwitz SB, Danishefsky SJ. Highly concise routes to epothilones: the total synthesis and evaluation of epothilone 490. J Am Chem Soc 2002; 124:9825-32. [PMID: 12175242 DOI: 10.1021/ja0262333] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A concise modular laboratory construction of the epothilone class of promising antitumor agents has been accomplished. For the first time in the epothilone area, the new synthesis exploits the power of ring-closing olefin metathesis (RCM) in a stereospecific way. Previous attempts at applying RCM to epothilone syntheses have been repeatedly plagued by complete lack of stereocontrol in the generation of the desired 12,13-olefin geometry in the products. The isolation of epothilone 490 (3) prompted us to reevaluate the utility of the RCM procedure for fashioning the 10,11-olefin, with the Z-12,13-olefin geometry already in place. Olefin metathesis of the triene substrate 12 afforded the product diene macrolide in stereoselective fashion. For purposes of greater synthetic convergency, the C3-(S)-alcohol was fashioned late in the synthesis, using chiral titanium-mediated aldol conditions with the entire O-alkyl fragment as a C15 acetate as the enolate component. Examination of the effects of protecting groups on the RCM process showed that deprotection of the C7 alcohol has a beneficial effect on the reaction yield. Performing the RCM as the last synthetic step in the sequence afforded a 64% yield of only the desired E-olefin. Selective diimide reduction of the new 10,11-olefin yielded 12,13-desoxyepothilone B, our current clinical candidate, demonstrating the utility of this new RCM-reduction protocol in efficiently generating the epothilone framework. Furthermore, the new olefin was selectively funtionalized to demonstrate the advantage conferred by this route for the construction of new analogues for SAR studies, in cytoxicity and microtubule affinity screens. Also described is the surprisingly poor in vivo performance of epothilone 490 in xenografts in the light of very promising in vitro data. This disappointing outcome was traced to unfavorable pharmacokinetic features of the drug in murine plasma. By the pharmacokinetic criteria, the prognosis for the effectiveness of 3 in humans is, in principle, much more promising.
Collapse
Affiliation(s)
- Kaustav Biswas
- Bioorganic Chemistry, Preclinical Pharmacology Core Facility and Analytical Pharmacology Core Facility, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, New York 10021, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Sun J, Sinha SC. Stereoselective Total Synthesis of Epothilones by the Metathesis Approach Involving C9−C10 Bond Formation. Angew Chem Int Ed Engl 2002; 41:1381-3. [DOI: 10.1002/1521-3773(20020415)41:8<1381::aid-anie1381>3.0.co;2-o] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
40
|
Stachel SJ, Danishefsky SJ. Chemo- and stereoselective epoxidation of 12,13-desoxyepothilone B using 2,2′-dimethyldioxirane. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01209-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|