Discovery of Small-Molecule CD33 Pre-mRNA Splicing Modulators

Author(s):  
Thomas A. Chappie ◽  
Mario Abdelmessih ◽  
Claude W. Ambroise ◽  
Markus Boehm ◽  
Mi Cai ◽  
...  
Keyword(s):  
2007 ◽  
Vol 3 (10) ◽  
pp. e159 ◽  
Author(s):  
Nadia Bakkour ◽  
Yea-Lih Lin ◽  
Sophie Maire ◽  
Lilia Ayadi ◽  
Florence Mahuteau-Betzer ◽  
...  

Author(s):  
Tilman Schneider-Poetsch ◽  
Jagat Krishna Chhipi-Shrestha ◽  
Minoru Yoshida

AbstractOver the course of more than two decades, natural products isolated from various microorganisms and plants have built the foundation for chemical biology research into the mechanism of pre-mRNA splicing. Hand in hand with advances in scientific methodology small molecule splicing modulators have become powerful tools for investigating, not just the splicing mechanism, but also the cellular effect of altered mRNA processing. Based on thorough structure-activity studies, synthetic analogues have moved on from scientific tool compounds to experimental drugs. With current advances in drug discovery methodology and new means of attacking targets previously thought undruggable, we can expect further advances in both research and therapeutics based on small molecule splicing modulators.


eLife ◽  
2017 ◽  
Vol 6 ◽  
Author(s):  
Anzhalika Sidarovich ◽  
Cindy L Will ◽  
Maria M Anokhina ◽  
Javier Ceballos ◽  
Sonja Sievers ◽  
...  

Small molecule inhibitors of pre-mRNA splicing are important tools for identifying new spliceosome assembly intermediates, allowing a finer dissection of spliceosome dynamics and function. Here, we identified a small molecule that inhibits human pre-mRNA splicing at an intermediate stage during conversion of pre-catalytic spliceosomal B complexes into activated Bact complexes. Characterization of the stalled complexes (designated B028) revealed that U4/U6 snRNP proteins are released during activation before the U6 Lsm and B-specific proteins, and before recruitment and/or stable incorporation of Prp19/CDC5L complex and other Bact complex proteins. The U2/U6 RNA network in B028 complexes differs from that of the Bact complex, consistent with the idea that the catalytic RNA core forms stepwise during the B to Bact transition and is likely stabilized by the Prp19/CDC5L complex and related proteins. Taken together, our data provide new insights into the RNP rearrangements and extensive exchange of proteins that occurs during spliceosome activation.


ChemBioChem ◽  
2012 ◽  
Vol 13 (5) ◽  
pp. 640-644 ◽  
Author(s):  
Timur R. Samatov ◽  
Alexander Wolf ◽  
Peter Odenwälder ◽  
Sergey Bessonov ◽  
Céline Deraeve ◽  
...  

2015 ◽  
Vol 290 (10) ◽  
pp. 6005-6005 ◽  
Author(s):  
Andrea Pawallek ◽  
Stuart McElroy ◽  
Timur Samatov ◽  
Lee Mitchell ◽  
Andrew Woodland ◽  
...  

2014 ◽  
Vol 289 (50) ◽  
pp. 34683-34698 ◽  
Author(s):  
Andrea Pawellek ◽  
Stuart McElroy ◽  
Timur Samatov ◽  
Lee Mitchell ◽  
Andrew Woodland ◽  
...  

2021 ◽  
Vol 56 (2) ◽  
pp. 59-66
Author(s):  
Astrid Eisenkölbl

ZusammenfassungSeit einiger Zeit stehen für die Behandlung der spinalen Muskelatrophie (SMA) Medikamente mit unterschiedlichen Wirkmechanismen zur Verfügung, die den Verlauf der Erkrankung erheblich beeinflussen können. Unbehandelt ist diese neuromuskuläre Erkrankung immer progredient und führt bei der schwersten Verlaufsform SMA Typ 1 meist innerhalb von 24 Monaten zum Tod. Der genetische Defekt liegt auf dem Survival-motor-neuron-1-Gen (SMN1-Gen). Dies führt zu einem Verlust von SMN1-Protein und damit zum Untergang von Motoneuronen. Bei allen Patienten liegt das SMN2-Gen, das nur etwa 10 % funktionstüchtiges Protein bilden kann, in unterschiedlicher Kopienanzahl vor und beeinflusst den klinischen Schweregrad der Erkrankung, wobei fließende Übergänge zwischen den einzelnen Typen zu beobachten sind. Das erste für die SMA zugelassene Medikament ist Spinraza®, ein Antisense-Oligonukleotid, das intrathekal verabreicht wird, das mRNA-Splicing verändert und so zu einer vermehrten Produktion von SMN2-Protein führt. Das zweite zugelassene Medikament ist Zolgensma®. Dabei handelt es sich um eine Genersatztherapie, bei der das SMN1-Gen mittels eines Virusvektors als Einmalinfusion in den Körper eingebracht wird, um dann funktionierendes SMN-Protein zu bilden. Kurz vor der Zulassung steht außerdem Risdiplam®, dies ist ein sogenanntes „small molecule“ und setzt wie Spinraza® am SMN2-Gen an. Der Vorteil besteht in der Möglichkeit der oralen Einnahme. In allen Studien zu diesen Medikamenten wurde gezeigt, dass ein möglichst früher, am besten präsymptomatischer Beginn die besten Ergebnisse in den motorischen Scores für die Patienten erbrachte. Ein Neugeborenen-Screening könnte die betroffenen Kinder noch vor Symptombeginn detektieren.


2019 ◽  
Author(s):  
Yihui Shi ◽  
Walter Bray ◽  
Alexander J. Smith ◽  
Wei Zhou ◽  
Joy Calaoagan ◽  
...  

ABSTRACTAgents that modulate pre-mRNA splicing are of interest in multiple therapeutic areas, including cancer. We report our recent screening results with the application of a cell-based Triple Exon Skipping Luciferase Reporter (TESLR) using a library that is composed of FDA approved drugs, clinical compounds, and mechanistically characterized tool compounds. Confirmatory assays showed that three clinical antitumor therapeutic candidates (milciclib, PF-3758309 and PF-030871) are potent splicing modulators and that these drugs are, in fact, nanomolar inhibitors of multiple kinases involved in the regulation the spliceosome. We also report the identification of new SF3B1 antagonists (sudemycinol C and E) and show that these antagonists can be used to develop a displacement assay for SF3B1 small molecule ligands. These results further supports the broad potential for the development of agents that target the spliceosome for the treatment of cancer and other diseases, as well as new avenues for chemotherapeutic discovery.


2020 ◽  
Author(s):  
Rakesh Chatrikhi ◽  
Callen F. Feeney ◽  
Mary J. Pulvino ◽  
Georgios Alachouzos ◽  
Andrew J. MacRae ◽  
...  

AbstractDysregulated pre-mRNA splicing is an emerging Achilles heel of cancers and myelodysplasias. To expand the currently limited portfolio of small molecule drug leads, we screened for chemical modulators of the U2AF complex, which nucleates spliceosome assembly and is mutated in myelodysplasias. A hit compound specifically enhances RNA binding by a U2AF2 subunit. Remarkably, the compound inhibits splicing of representative substrates in cells and stalls spliceosome assembly at the stage of U2AF function. Computational docking, together with structure-guided mutagenesis, indicates that the compound bridges an active conformation of the U2AF2 RNA recognition motifs via hydrophobic and electrostatic moieties. Altogether, our results highlight the potential of trapping early spliceosome assembly as an effective pharmacological means to manipulate pre-mRNA splicing. By extension, we suggest that stabilizing inactive checkpoints may offer a breakthrough approach for small molecule inhibition of multi-stage macromolecular assemblies.


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