Subtopic Deep Dive
Hippo Pathway in Cancer
Research Guide
What is Hippo Pathway in Cancer?
The Hippo pathway in cancer examines dysregulation of Hippo-YAP/TAZ signaling that promotes tumorigenesis, metastasis, and resistance to therapy through mutations in core kinases like MST1/2 and LATS1/2.
Dysregulated Hippo signaling drives oncogenic growth by enabling YAP/TAZ nuclear translocation and TEAD-mediated transcription (Zhao et al., 2008, 2461 citations). Key mechanisms include YAP phosphorylation by LATS and CK1 targeting it for degradation via SCFβ-TRCP (Zhao et al., 2010, 1406 citations). Over 10 highly cited papers from 2008-2017 detail YAP/TAZ roles in proliferation, EMT, and anoikis resistance.
Why It Matters
Hippo pathway dysregulation contributes to multiple cancers by enhancing YAP/TAZ-driven proliferation and metastasis, as shown in TEAD-YAP interactions amplifying oncogenes (Zhao et al., 2008). TAZ promotes epithelial-mesenchymal transition (EMT) essential for invasion, inhibited by LATS phosphorylation (Lei et al., 2008). Targeting YAP/TAZ-TEAD or AP-1 complexes at enhancers offers therapeutic potential, evidenced by genome-wide studies linking them to oncogenic growth (Zanconato et al., 2015). Clinical correlations with MST1/2 and LATS1/2 mutations guide precision oncology.
Key Research Challenges
Heterogeneous YAP/TAZ Activation
YAP/TAZ activation varies across tumor microenvironments, complicating uniform targeting (Meng et al., 2016). Intra-tumor heterogeneity from cancer stem cells exacerbates this, linking Hippo dysregulation to stemness (Prasetyanti and Medema, 2017). Over 800 citations highlight modeling challenges in diverse cancers.
Therapeutic Resistance Mechanisms
YAP stability evades degradation despite LATS/CK1 phosphorylation, promoting survival (Zhao et al., 2010). Anoikis resistance via cytoskeleton reorganization sustains metastasis (Zhao et al., 2012). Kinase cascade dysregulation resists inhibitors (Yu and Guan, 2013).
Tumor Microenvironment Interactions
Cell detachment and ECM loss activate Hippo pathway, but cancer cells override for anoikis resistance (Zhao et al., 2012). YAP/TEAD-AP-1 at enhancers drives context-specific oncogenesis (Zanconato et al., 2015). Over 1200 citations underscore integration challenges with stromal signals.
Essential Papers
TEAD mediates YAP-dependent gene induction and growth control
Bin Zhao, Xin Ye, Jindan Yu et al. · 2008 · Genes & Development · 2.5K citations
The YAP transcription coactivator has been implicated as an oncogene and is amplified in human cancers. Recent studies have established that YAP is phosphorylated and inhibited by the Hippo tumor s...
Mechanisms of Hippo pathway regulation
Zhipeng Meng, Toshiro Moroishi, Kun‐Liang Guan · 2016 · Genes & Development · 1.7K citations
The Hippo pathway was initially identified in Drosophila melanogaster screens for tissue growth two decades ago and has been a subject extensively studied in both Drosophila and mammals in the last...
A coordinated phosphorylation by Lats and CK1 regulates YAP stability through SCF<sup>β-TRCP</sup>
Bin Zhao, Li Li, Karen Tumaneng et al. · 2010 · Genes & Development · 1.4K citations
The Yes-associated protein (YAP) transcription coactivator is a key regulator of organ size and a candidate human oncogene. YAP is inhibited by the Hippo pathway kinase cascade, at least in part vi...
The Hippo pathway: regulators and regulations
Fa‐Xing Yu, Kun‐Liang Guan · 2013 · Genes & Development · 1.2K citations
Control of cell number is crucial in animal development and tissue homeostasis, and its dysregulation may result in tumor formation or organ degeneration. The Hippo pathway in both Drosophila and m...
Genome-wide association between YAP/TAZ/TEAD and AP-1 at enhancers drives oncogenic growth
Francesca Zanconato, Mattia Forcato, Giusy Battilana et al. · 2015 · Nature Cell Biology · 1.2K citations
The Hippo–YAP pathway in organ size control and tumorigenesis: an updated version
Bin Zhao, Li Li, Qun‐Ying Lei et al. · 2010 · Genes & Development · 1.1K citations
The Hippo signaling pathway is gaining recognition as an important player in both organ size control and tumorigenesis, which are physiological and pathological processes that share common cellular...
TAZ Promotes Cell Proliferation and Epithelial-Mesenchymal Transition and Is Inhibited by the Hippo Pathway
Qun‐Ying Lei, Heng Zhang, Bin Zhao et al. · 2008 · Molecular and Cellular Biology · 910 citations
TAZ is a WW domain containing a transcription coactivator that modulates mesenchymal differentiation and development of multiple organs. In this study, we show that TAZ is phosphorylated by the Lat...
Reading Guide
Foundational Papers
Start with Zhao et al. (2008, 2461 citations) for TEAD-YAP oncogene validation, then Zhao et al. (2010, 1406 citations) for phosphorylation-degradation axis, and Yu and Guan (2013, 1215 citations) for full regulator overview.
Recent Advances
Zanconato et al. (2015, 1201 citations) for YAP/TAZ/TEAD-AP-1 enhancers; Meng et al. (2016, 1674 citations) updates regulation mechanisms in cancer contexts.
Core Methods
Core techniques: YAP Ser127 phosphorylation by LATS, SCFβ-TRCP ubiquitination, TEAD luciferase assays, anoikis via cytoskeleton reorganization, ChIP-seq for enhancer mapping.
How PapersFlow Helps You Research Hippo Pathway in Cancer
Discover & Search
Research Agent uses searchPapers and citationGraph on 'Hippo YAP cancer' to map 250M+ OpenAlex papers, centering Zhao et al. (2008, 2461 citations) as the core node linking TEAD-YAP to oncogenesis. exaSearch uncovers clinical mutation studies; findSimilarPapers expands to LATS1/2 dysregulation.
Analyze & Verify
Analysis Agent applies readPaperContent to parse Zhao et al. (2010) for YAP phosphorylation motifs, then verifyResponse with CoVe chain-of-verification flags inconsistencies in degradation claims. runPythonAnalysis statistically verifies YAP/TEAD binding frequencies across 10 papers using pandas; GRADE grades evidence as A-level for mechanistic claims.
Synthesize & Write
Synthesis Agent detects gaps in YAP/TAZ targeting therapies via contradiction flagging across Meng et al. (2016) and Zanconato et al. (2015). Writing Agent uses latexEditText and latexSyncCitations to draft reviews, latexCompile for figures, and exportMermaid for kinase cascade diagrams.
Use Cases
"Correlate LATS1/2 mutation frequencies with YAP nuclear localization in liver cancer datasets."
Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (pandas aggregation of mutation data from 5 papers) → matplotlib survival plots output.
"Draft LaTeX review on Hippo-YAP in metastasis with citations."
Synthesis Agent → gap detection → Writing Agent → latexEditText + latexSyncCitations (Zhao 2008, Lei 2008) → latexCompile → PDF review output.
"Find GitHub repos analyzing Hippo pathway mutations from recent papers."
Research Agent → paperExtractUrls (Yu and Guan 2013) → paperFindGithubRepo → githubRepoInspect → code snippets for MST1/2 simulations output.
Automated Workflows
Deep Research workflow conducts systematic review of 50+ Hippo-cancer papers: searchPapers → citationGraph → GRADE grading → structured report on YAP/TAZ targets. DeepScan applies 7-step analysis with CoVe checkpoints to verify anoikis claims in Zhao et al. (2012). Theorizer generates hypotheses on LATS inhibitors from Meng et al. (2016) mechanisms.
Frequently Asked Questions
What defines Hippo pathway dysregulation in cancer?
Loss of MST1/2-LATS1/2 phosphorylation allows YAP/TAZ nuclear entry and TEAD binding, driving proliferation (Zhao et al., 2008).
What are key methods studying Hippo in tumors?
Phosphorylation assays, TEAD-luciferase reporters, and ChIP-seq map YAP targets; SCFβ-TRCP degradation is tracked via ubiquitination (Zhao et al., 2010).
What are pivotal papers?
Zhao et al. (2008, 2461 citations) establishes TEAD-YAP oncogenesis; Zhao et al. (2010, 1406 citations) details LATS-CK1 regulation (Yu and Guan, 2013, 1215 citations) reviews regulators.
What open problems remain?
Heterogeneous activation in tumor niches and resistance to YAP inhibitors; stem cell self-renewal links need clinical validation (Lian et al., 2010; Prasetyanti and Medema, 2017).
Research Hippo pathway signaling and YAP/TAZ with AI
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