Article
Multidisciplinary Sciences
Wei-Ching Chen, Minh D. To, Peter M. K. Westcott, Reyno Delrosario, Il-Jin Kim, Mark Philips, Quan Tran, Saumya R. Bollam, Hani Goodarzi, Nora Bayani, Olga Mirzoeva, Allan Balmain
Summary: The KRAS oncogene can generate two isoforms through alternative splicing, KRAS4A and KRAS4B. The splicing regulation of both isoforms is crucial for the development of Kras mutant tumors. KRAS4A is enriched in cancer stem-like cells and responds to hypoxia, while KRAS4B is induced by ER stress. Targeting KRAS4A splicing with existing drugs may be a potential therapeutic strategy for cancer treatment.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Medicinal
Hongling Zhou, Youfang Gan, Yuanyuan Li, Xiaoqian Chen, Yuyang Guo, Rui Wang
Summary: Protein degradation is an effective strategy to modulate protein functions and cellular signaling pathways. A chemically catalyzed PROTAC approach was developed to induce the degradation of RAS protein through post-translational prenyl modification. This method successfully degraded RAS protein in multiple cancer cell lines, expanding the PROTAC toolsets for studying disease-relevant protein targets.
JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Till Rudack, Christian Teuber, Marvin Scherlo, Joern Gueldenhaupt, Jonas Schartner, Mathias Luebben, Johann Klare, Klaus Gerwert, Carsten Koetting
Summary: Studying the Ras dimer structure has shown that inhibiting the dimerization of oncogenic Ras can suppress cancer cell growth. By incorporating unnatural amino acids into Ras and utilizing labeling methods, the accuracy of the dimer structure model can be validated.
Article
Chemistry, Medicinal
Zoltan Orgovan, Nikolett Peczka, Laszlo Petri, Peter Abranyi-Balogh, Ivan Randelovic, Szilard Toth, Gergely Szakacs, Kinga Nyiri, Beata Vertessy, Gyula Palfy, Istvan Vida, Andras Perczel, Jozsef Tovari, Gyorgy M. Keseru
Summary: Covalent fragment screening of a diverse library of non-covalent scaffolds equipped with 40 different electrophilic functionalities identified two potential inhibitor chemotypes targeting the G12C mutant KRas. These scaffolds showed promising results in in vitro cellular and in vivo xenograft models, demonstrating their potential as starting points for covalent drug discovery programs.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Review
Cell Biology
Isha Godwin, Nikhil Ponnoor Anto, Smitha Bava, Mani Shankar Babu, Goodwin G. Jinesh
Summary: Cellular transformation plays a crucial role in evading apoptosis, genomic instability, and immune surveillance, ultimately promoting cancer stem cell expansion and tumor progression. Defects in key apoptotic regulators lead to cellular transformation, stemness, tumorigenesis, and metastasis.
CELL DEATH DISCOVERY
(2021)
Article
Multidisciplinary Sciences
Samuel G. Chamberlain, Andrea Gohlke, Arooj Shafiq, Iolo J. Squires, Darerca Owen, Helen R. Mott
Summary: The study reveals that in vivo, CaM interacts exclusively with the C terminus of RaIA and binding of CaM leads to removal of RaIA from its membrane environment. These findings provide important clues to understand how CaM regulates the function of RaIA.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Oncology
Amin Izadpanah, Fatemeh Daneshimehr, Kurtis Willingham, Zahra Barabadi, Stephen E. Braun, Aaron Dumont, Ricardo Mostany, Bysani Chandrasekar, Eckhard U. Alt, Reza Izadpanah
Summary: TRAF3IP2 has been identified as a critical regulator of angiogenesis in glioblastoma multiforme (GBM), and targeting TRAF3IP2 could significantly reduce vascularization and inhibit the expression of growth factors, providing a potential therapeutic option for GBM.
FRONTIERS IN ONCOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Nan Qiu, Daniel Abegg, Mara Guidi, Kerry Gilmore, Peter H. Seeberger, Alexander Adibekian
Summary: Protein S-palmitoylation is crucial in cancer cells, and artemisinin, a clinically approved antimalarial drug, has been found to inhibit a specific palmitoyl transferase, reducing palmitoylation of oncogenic proteins and disrupting cell proliferation signaling cascades.
CELL CHEMICAL BIOLOGY
(2022)
Article
Chemistry, Medicinal
Gabriele Fumagalli, Rodrigo J. Carbajo, J. Willem M. Nissink, Jonathan Tart, Rongxuan Dou, Andrew P. Thomas, David R. Spring
Summary: The study focused on the identification of pan-mutant RAS inhibitors by designing novel peptides using a binding pharmacophore. Through a chemically divergent approach, the researchers generated a library of small stapled peptides and optimized them to create low-micromolar binders of KRAS that inhibit nucleotide exchange.
JOURNAL OF MEDICINAL CHEMISTRY
(2021)
Article
Chemistry, Medicinal
Joachim Broeker, Alex G. Waterson, Chris Smethurst, Dirk Kessler, Jark Boettcher, Moriz Mayer, Gerhard Gmaschitz, Jason Phan, Andrew Little, Jason R. Abbott, Qi Sun, Michael Gmachl, Dorothea Rudolph, Heribert Arnhof, Klaus Rumpel, Fabio Savarese, Thomas Gerstberger, Nikolai Mischerikow, Matthias Treu, Lorenz Herdeis, Tobias Wunberg, Andreas Gollner, Harald Weinstabl, Andreas Mantoulidis, Oliver Kraemer, Darryl B. McConnell, Stephen W. Fesik
Summary: Activating mutations in KRAS, especially KRASG12C located at position 12, are common in cancer. Most of the discovered KRASG12C inhibitors covalently bind to the cysteine at this position. However, this study presents a different approach, in which reversible binding small molecules were identified and optimized for non-covalent binding to the switch II pocket. The newly discovered KRASG12C inhibitor, BI-0474, shows in vivo activity and opens up possibilities for the discovery of inhibitors against other oncogenic KRAS mutants.
JOURNAL OF MEDICINAL CHEMISTRY
(2022)
Article
Chemistry, Medicinal
Ling Wang, Danya Zhang, Jie Li, Fei Li, Rui Wei, Guiying Jiang, Hanjie Xu, Xueqian Wang, Ying Zhou, Ling Xi
Summary: A novel TMTP1 homodimer-directed NIR probe was successfully constructed and synthesized in this study, showing improved sensitivity and tumor targeting ability for imaging. In vivo experiments demonstrated the potential of this dimer as a promising theranostic agent for clinical transformation.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2022)
Article
Oncology
Upasana Ray, Deok-Beom Jung, Ling Jin, Yinan Xiao, Subramanyam Dasari, Sayantani Sarkar Bhattacharya, Prabhu Thirusangu, Julie K. Staub, Debarshi Roy, Bhaskar Roy, S. John Weroha, Xiaonan Hou, James W. Purcell, Jamie N. Bakkum-Gamez, Scott H. Kaufmann, Nagarajan Kannan, Anirban K. Mitra, Viji Shridhar
Summary: This study identifies the role of LRRC15 in promoting ovarian cancer metastasis and demonstrates that the LRRC15-targeted antibody-drug conjugate can suppress ovarian cancer metastasis.
Article
Biochemistry & Molecular Biology
Zhimin Xu, Chuangnan Qiu, Biyan Wen, Shuang Wang, Linfeng Zhu, Lin Zhao, Huangjin Li
Summary: The bispecific nanobody targeting the EGFR dimer interface with ADCC effect showed promising anti-tumor efficacy both in vitro and in vivo, especially when combined with peripheral blood mononuclear cells. This therapeutic antibody has potential for further development and has demonstrated effectiveness in cell models and animal models.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2021)
Review
Biochemistry & Molecular Biology
Paul D. Adams, Djamali Muhoza
Summary: The Ras proteins have been recognized as crucial genes for regulating cell growth and are closely associated with human cancers. Among the Ras superfamily, K-Ras mutations are the most prevalent in human cancers, particularly the K-Ras G12C mutations in pancreatic, colon, lung cancers, and leukemias. Although targeting Ras proteins for therapeutic purposes remains challenging, there is a renewed interest in this area, with promising approaches for treating Ras-related tumors. This review highlights recent developments in K-Ras drug candidates and approaches, as well as the potential of macromolecules targeting Ras.
PROTEIN AND PEPTIDE LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Michael Whaby, Lauren Wallon, Megan Mazzei, Imran Khan, Kai Wen Teng, Shohei Koide, John P. O'Bryan
Summary: Mutations in RAS genes are common in human cancers, leading to persistent activation of RAS and its effectors. Proposed mutations disrupting RAS dimerization do not significantly affect self-association, signaling, or transformation of oncogenic RAS.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Russell Spencer-Smith, Akiko Koide, Yong Zhou, Raphael R. Eguchi, Fern She, Priyanka Gajwani, Dianicha Santana, Ankit Gupta, Miranda Jacobs, Erika Herrero-Garcia, Jacqueline Cobbert, Hugo Lavoie, Matthew Smith, Thanashan Rajakulendran, Evan Dowdell, Mustafa Nazir Okur, Irina Dementieva, Frank Sicheri, Marc Therrien, John F. Hancock, Mitsuhiko Ikura, Shohei Koide, John P. O'Bryan
NATURE CHEMICAL BIOLOGY
(2017)
Article
Oncology
Russell Spencer-Smith, John P. O'Bryan
SEMINARS IN CANCER BIOLOGY
(2019)
Article
Hematology
Varadarajan Sudhahar, Mustafa Nazir Okur, Zsolt Bagi, John P. O'Bryan, Nissim Hay, Ayako Makino, Vijay S. Patel, Shane A. Phillips, David Stepp, Masuko Ushio-Fukai, Tohru Fukai
ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY
(2018)
Review
Pharmacology & Pharmacy
John P. O'Bryan
PHARMACOLOGICAL RESEARCH
(2019)
Correction
Biochemistry & Molecular Biology
Imran Khan, Russell Spencer-Smith, John P. O'Bryan
Article
Biochemistry & Molecular Biology
Imran Khan, J. Matthew Rhett, John P. O'Bryan
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH
(2020)
Article
Biochemistry & Molecular Biology
Elizabeth M. Terrell, David E. Durrant, Daniel A. Ritt, Nancy E. Sealover, Erin Sheffels, Russell Spencer-Smith, Dominic Esposito, Yong Zhou, John F. Hancock, Robert L. Kortum, Deborah K. Morrison
Article
Cell Biology
Imran Khan, Akiko Koide, Mariyam Zuberi, Gayatri Ketavarapu, Eric Denbaum, Kai Wen Teng, J. Matthew Rhett, Russell Spencer-Smith, G. Aaron Hobbs, Ernest Ramsay Camp, Shohei Koide, John P. O'Bryan
Summary: This study discovered a compound that selectively binds to the nucleotide-free state of RAS and inhibits the signaling and transforming activity of certain RAS mutants with fast exchange rates. In cell experiments and animal models, this compound exhibited the ability to reduce tumor formation in cancer cells.
Article
Biochemistry & Molecular Biology
Russell Spencer-Smith, Elizabeth M. Terrell, Christine Insinna, Constance Agamasu, Morgan E. Wagner, Daniel A. Ritt, Jim Stauffer, Andrew G. Stephen, Deborah K. Morrison
Summary: BRAF mutations are common in human cancer and RASopathy syndromes. Mutations in the cysteine-rich domain (CRD) increase BRAF activity by relieving autoinhibition and enhancing PS binding, with relief of autoinhibition being the major factor determining mutation severity. CRD-mediated autoinhibition prevents the constitutive plasma membrane localization of BRAF and affects its function.
Article
Biochemical Research Methods
Russell Spencer-Smith, Deborah K. Morrison
Summary: This article presents a proximity-based NanoBRET assay for measuring the autoinhibition of BRAF in live cells. The authors provide a detailed protocol for cell seeding, transfection, and replating, as well as procedures for reading NanoBRET emissions and confirming protein expression.
Article
Microbiology
Russell Spencer-Smith, Simon W. Gould, Madhuri Pulijala, Lori A. S. Snyder
Review
Biochemistry & Molecular Biology
Erika Herrero-Garcia, John P. O'Bryan
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH
(2017)