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1.
Nat Commun ; 15(1): 5809, 2024 Jul 10.
Artigo em Inglês | MEDLINE | ID: mdl-38987584

RESUMO

Human papillomaviruses (HPVs) cause most cervical cancers and an increasing number of anogenital and oral carcinomas, with most cases caused by HPV16 or HPV18. HPV hijacks host signalling pathways to promote carcinogenesis. Understanding these interactions could permit identification of much-needed therapeutics for HPV-driven malignancies. The Hippo signalling pathway is important in HPV+ cancers, with the downstream effector YAP playing a pro-oncogenic role. In contrast, the significance of its paralogue TAZ remains largely uncharacterised in these cancers. We demonstrate that TAZ is dysregulated in a HPV-type dependent manner by a distinct mechanism to that of YAP and controls proliferation via alternative cellular targets. Analysis of cervical cancer cell lines and patient biopsies revealed that TAZ expression was only significantly increased in HPV18+ and HPV18-like cells and TAZ knockdown reduced proliferation, migration and invasion only in HPV18+ cells. RNA-sequencing of HPV18+ cervical cells revealed that YAP and TAZ have distinct targets, suggesting they promote carcinogenesis by different mechanisms. Thus, in HPV18+ cancers, YAP and TAZ play non-redundant roles. This analysis identified TOGARAM2 as a previously uncharacterised TAZ target and demonstrates its role as a key effector of TAZ-mediated proliferation, migration and invasion in HPV18+ cancers.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Proliferação de Células , Via de Sinalização Hippo , Papillomavirus Humano 18 , Infecções por Papillomavirus , Proteínas Serina-Treonina Quinases , Transdução de Sinais , Fatores de Transcrição , Neoplasias do Colo do Útero , Proteínas de Sinalização YAP , Humanos , Feminino , Neoplasias do Colo do Útero/virologia , Neoplasias do Colo do Útero/metabolismo , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/patologia , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Linhagem Celular Tumoral , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas de Sinalização YAP/metabolismo , Infecções por Papillomavirus/virologia , Infecções por Papillomavirus/metabolismo , Infecções por Papillomavirus/genética , Infecções por Papillomavirus/patologia , Papillomavirus Humano 18/genética , Papillomavirus Humano 18/metabolismo , Proteínas Serina-Treonina Quinases/metabolismo , Proteínas Serina-Treonina Quinases/genética , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Movimento Celular , Regulação Neoplásica da Expressão Gênica , Papillomavirus Humano 16/genética , Papillomavirus Humano 16/metabolismo , Transativadores/metabolismo , Transativadores/genética , Carcinogênese/genética
2.
Int J Oncol ; 65(2)2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38873993

RESUMO

Genes encoding subunits of SWI/SNF (BAF) chromatin­remodeling complexes are recurrently mutated in a broad array of tumor types, and among the subunits, ARID1A is the most frequent target with mutations. In the present study, it was reported that ARID1A inhibits the epithelial­mesenchymal transition (EMT) and stemness of ovarian cancer cells, accompanied by reduced cell viability, migration and colony formation, suggesting that ARID1A acts as a tumor suppressor in ovarian cancer. Mechanistically, ARID1A exerts its inhibitory effects on ovarian cancer cells by activating the Hippo signaling pathway. Conversely, the overexpression of a gain­of­function transcriptional co­activator with PDZ­binding motif (TAZ) mutant (TAZ­Ser89) effectively reverses the effects induced by ARID1A. In addition, activation of Hippo signaling apparently upregulates ARID1A protein expression, whereas ectopic expression of TAZ­Ser89 results in the markedly decreased ARID1A levels, indicating a feedback of ARID1A­TAZ in regulating ovarian cancer cell EMT and stemness. Thus, the present study uncovered the role of ARID1A through the Hippo/TAZ pathway in modulating EMT and stemness of ovarian cancer cells, and providing with evidence that TAZ inhibitors could effectively prevent initiation and metastasis of ovarian cancer cases where ARID1A is lost or mutated.


Assuntos
Proteínas de Ligação a DNA , Transição Epitelial-Mesenquimal , Regulação Neoplásica da Expressão Gênica , Via de Sinalização Hippo , Células-Tronco Neoplásicas , Neoplasias Ovarianas , Proteínas Serina-Treonina Quinases , Transdução de Sinais , Fatores de Transcrição , Humanos , Feminino , Neoplasias Ovarianas/patologia , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/metabolismo , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Proteínas de Ligação a DNA/metabolismo , Proteínas de Ligação a DNA/genética , Linhagem Celular Tumoral , Proteínas Serina-Treonina Quinases/metabolismo , Proteínas Serina-Treonina Quinases/genética , Células-Tronco Neoplásicas/metabolismo , Células-Tronco Neoplásicas/patologia , Movimento Celular , Proliferação de Células , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética
3.
Arch Pharm Res ; 47(6): 558-570, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38874747

RESUMO

Metabolic dysfunction-associated steatotic liver disease (MASLD) is becoming an increasingly pressing global health challenge, with increasing mortality rates showing an upward trend. Two million deaths occur annually from cirrhosis and liver cancer together each year. Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ), key effectors of the Hippo signaling pathway, critically regulate tissue homeostasis and disease progression in the liver. While initial studies have shown that YAP expression is normally restricted to cholangiocytes in healthy livers, the activation of YAP/TAZ is observed in other hepatic cells during chronic liver disease. The disease-driven dysregulation of YAP/TAZ appears to be a critical element in the MASLD progression, contributing to hepatocyte dysfunction, inflammation, and fibrosis. In this study, we focused on the complex roles of YAP/TAZ in MASLD and explored how the YAP/TAZ dysregulation of YAP/TAZ drives steatosis, inflammation, fibrosis, and cirrhosis. Finally, the cell-type-specific functions of YAP/TAZ in different types of hepatic cells, such as hepatocytes, hepatic stellate cells, hepatic macrophages, and biliary epithelial cells are discussed, highlighting the multifaceted impact of YAP/TAZ on liver physiology and pathology.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Progressão da Doença , Fatores de Transcrição , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Proteínas de Sinalização YAP , Humanos , Fatores de Transcrição/metabolismo , Proteínas de Sinalização YAP/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Animais , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Fígado Gorduroso/metabolismo , Fígado Gorduroso/patologia , Transativadores/metabolismo , Transdução de Sinais
4.
Anticancer Res ; 44(7): 3005-3011, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38925840

RESUMO

BACKGROUND/AIM: Glioblastoma multiforme (GBM) is one of the most lethal types of brain cancer with a median survival of only 12 months due to its aggressiveness and lack of effective treatment options. Astrocytomas and oligodendrogliomas are classified as low-grade gliomas (LGG) and have the potential to progress into secondary GBM. YAP1 and TAZ are transcriptional co-activators of the hippo pathway and play an important role in tumorigenesis by controlling cell proliferation and differentiation. The aim of this study was to analyze whether YAP1 and TAZ influence the survival in patients with astrocytoma and oligodendroglioma. PATIENTS AND METHODS: A total of 22 patient samples of astrocytoma and 11 samples of oligodendroglioma were analyzed using real-time PCR. We utilized open-access data from The Cancer Genome Atlas (TCGA) focusing on "brain lower grade glioma". mRNA expression rates were used to validate our findings on survival analysis. RESULTS: Expression of YAP1 was twice as high in astrocytoma than in oligodendroglioma, whereas there was no difference in TAZ. In oligodendrogliomas, the expression of TAZ was higher in relapsed than in primary tumors. Patients with astrocytoma having a high YAP1 expression had a significantly shorter overall survival than patients with lower expression (median survival 161 vs. 86 months, p=0.0248). These findings were validated with survival analysis of TCGA data. CONCLUSION: High YAP1 expression shows a high correlation with poorer overall survival in LGG. YAP1 has higher levels of expression in astrocytomas than in oligodendrogliomas.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Astrocitoma , Neoplasias Encefálicas , Fatores de Transcrição , Proteínas de Sinalização YAP , Humanos , Proteínas de Sinalização YAP/metabolismo , Astrocitoma/metabolismo , Astrocitoma/genética , Astrocitoma/patologia , Astrocitoma/mortalidade , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Feminino , Masculino , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Neoplasias Encefálicas/metabolismo , Neoplasias Encefálicas/mortalidade , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/patologia , Pessoa de Meia-Idade , Adulto , Gradação de Tumores , Oligodendroglioma/genética , Oligodendroglioma/metabolismo , Oligodendroglioma/patologia , Oligodendroglioma/mortalidade , Fosfoproteínas/metabolismo , Fosfoproteínas/genética , Idoso , Prognóstico , Regulação Neoplásica da Expressão Gênica , Biomarcadores Tumorais/metabolismo , Biomarcadores Tumorais/genética , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Transativadores/genética , Transativadores/metabolismo , Adulto Jovem
5.
BMC Oral Health ; 24(1): 733, 2024 Jun 26.
Artigo em Inglês | MEDLINE | ID: mdl-38926705

RESUMO

BACKGROUND: Human periodontal ligament stem cells (hPDLSCs) are important candidate seed cells for periodontal tissue engineering, but the presence of lipopolysaccharide(LPS) in periodontal tissues inhibits the self-renewal and osteogenic differentiation of hPDLSCs. Our previous studies demonstrated that TAZ is a positive regulator of osteogenic differentiation of hPDLSCs, but whether TAZ can protect hPDLSCs from LPS is still unknown. The present study aimed to explore the regulatory effect of TAZ on the osteogenic differentiation of hPDLSCs in an LPS-induced inflammatory model, and to preliminarily reveal the molecular mechanisms related to the NF-κB signaling pathway. METHODS: LPS was added to the culture medium of hPDLSCs. The influence of LPS on hPDLSC proliferation was analyzed by CCK-8 assays. The effects of LPS on hPDLSC osteogenic differentiation were detected by Alizarin Red staining, ALP staining, Western Blot and qRT-PCR analysis of osteogenesis-related genes. The effects of LPS on the osteogenic differentiation of hPDLSCs with TAZ overexpressed or knocked down via lentivirus were analyzed. NF-κB signaling in hPDLSCs was analyzed by Western Blot and immunofluorescence. RESULTS: LPS inhibited the osteogenic differentiation of hPDLSCs, inhibited TAZ expression, and activated the NF-κB signaling pathway. Overexpressing TAZ in hPDLSCs partly reversed the negative effects of LPS on osteogenic differentiation and inhibited the activation of the NF-κB pathway by LPS. TAZ knockdown enhanced the inhibitory effects of LPS on osteogenesis. CONCLUSION: Overexpressing TAZ could partly reverse the inhibitory effects of LPS on the osteogenic differentiation of hPDLSCs, possibly through inhibiting the NF-κB signaling pathway. TAZ is a potential target for improving hPDLSC-based periodontal tissue regeneration in inflammatory environments.


Assuntos
Diferenciação Celular , Lipopolissacarídeos , NF-kappa B , Osteogênese , Ligamento Periodontal , Transdução de Sinais , Células-Tronco , Humanos , Ligamento Periodontal/citologia , Ligamento Periodontal/efeitos dos fármacos , Lipopolissacarídeos/farmacologia , Osteogênese/efeitos dos fármacos , NF-kappa B/metabolismo , Diferenciação Celular/efeitos dos fármacos , Transdução de Sinais/efeitos dos fármacos , Células-Tronco/efeitos dos fármacos , Fatores de Transcrição/metabolismo , Células Cultivadas , Proliferação de Células/efeitos dos fármacos , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Western Blotting
6.
Respir Res ; 25(1): 212, 2024 May 18.
Artigo em Inglês | MEDLINE | ID: mdl-38762455

RESUMO

Paraquat (PQ) is a widely used herbicide and a common cause of poisoning that leads to pulmonary fibrosis with a high mortality rate. However, the underlying mechanisms of PQ-induced pulmonary fibrosis and whether pulmonary epithelial cell senescence is involved in the process remain elusive. In this study, PQ-induced pulmonary epithelial cell senescence and Hippo-YAP/TAZ activation were observed in both C57BL/6 mice and human epithelial cells. PQ-induced senescent pulmonary epithelial cells promoted lung fibroblast transformation through secreting senescence-associated secretory phenotype (SASP) factors. Yap/Taz knockdown in mice lungs significantly decreased the expression of downstream profibrotic protein Ctgf and senescent markers p16 and p21, and alleviated PQ-induced pulmonary fibrosis. Interfering YAP/TAZ in senescent human pulmonary epithelial cells resulted in decreased expression of the anti-apoptosis protein survivin and elevated level of apoptosis. In conclusion, our findings reveal a novel mechanism by which the involvement of Hippo-YAP/TAZ activation in pulmonary epithelial cell senescence mediates the pathogenesis of PQ-induced pulmonary fibrosis, thereby offering novel insights and potential targets for the clinical management of PQ poisoning as well as providing the mechanistic insight of the involvement of Yap/Taz activation in cell senescence in pulmonary fibrosis and its related pulmonary disorders. The YIN YANG balance between cell senescence and apoptosis is important to maintain the homeostasis of the lung, the disruption of which will lead to disease.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Senescência Celular , Camundongos Endogâmicos C57BL , Paraquat , Fibrose Pulmonar , Fatores de Transcrição , Proteínas de Sinalização YAP , Animais , Senescência Celular/efeitos dos fármacos , Senescência Celular/fisiologia , Proteínas de Sinalização YAP/metabolismo , Humanos , Camundongos , Fibrose Pulmonar/metabolismo , Fibrose Pulmonar/induzido quimicamente , Fibrose Pulmonar/patologia , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Paraquat/toxicidade , Masculino , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Células Epiteliais/metabolismo , Células Epiteliais/efeitos dos fármacos , Células Epiteliais/patologia , Transativadores/metabolismo , Transativadores/genética
7.
FASEB J ; 38(10): e23636, 2024 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-38752683

RESUMO

Osteoarthritis (OA) and rheumatoid arthritis (RA) are two common forms of arthritis with undefined etiology and pathogenesis. Yes-associated protein (YAP) and its homolog transcriptional coactivator with PDZ-binding motif (TAZ), which act as sensors for cellular mechanical and inflammatory cues, have been identified as crucial players in the regulation of joint homeostasis. Current studies also reveal a significant association between YAP/TAZ and the pathogenesis of OA and RA. The objective of this review is to elucidate the impact of YAP/TAZ on different joint tissues and to provide inspiration for further studying the potential therapeutic implications of YAP/TAZ on arthritis. Databases, such as PubMed, Cochran Library, and Embase, were searched for all available studies during the past two decades, with keywords "YAP," "TAZ," "OA," and "RA."


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Artrite Reumatoide , Osteoartrite , Fatores de Transcrição , Proteínas de Sinalização YAP , Humanos , Fatores de Transcrição/metabolismo , Animais , Artrite Reumatoide/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas de Sinalização YAP/metabolismo , Osteoartrite/metabolismo , Osteoartrite/etiologia , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Articulações/metabolismo , Articulações/patologia , Transativadores/metabolismo , Transativadores/genética
8.
FASEB J ; 38(9): e23633, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38690712

RESUMO

Recent reports suggest that the Hippo signaling pathway regulates testis development, though its exact roles in Sertoli cell differentiation remain unknown. Here, we examined the functions of the main Hippo pathway kinases, large tumor suppressor homolog kinases 1 and 2 (Lats1 and Lats2) in developing mouse Sertoli cells. Conditional inactivation of Lats1/2 in Sertoli cells resulted in the disorganization and overgrowth of the testis cords, the induction of a testicular inflammatory response and germ cell apoptosis. Stimulated by retinoic acid 8 (STRA8) expression in germ cells additionally suggested that germ cells may have been preparing to enter meiosis prior to their loss. Gene expression analyses of the developing testes of conditional knockout animals further suggested impaired Sertoli cell differentiation, epithelial-to-mesenchymal transition, and the induction of a specific set of genes associated with Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ)-mediated integrin signaling. Finally, the involvement of YAP/TAZ in Sertoli cell differentiation was confirmed by concomitantly inactivating Yap/Taz in Lats1/2 conditional knockout model, which resulted in a partial rescue of the testicular phenotypic changes. Taken together, these results identify Hippo signaling as a crucial pathway for Sertoli cell development and provide novel insight into Sertoli cell fate maintenance.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Diferenciação Celular , Proteínas Serina-Treonina Quinases , Células de Sertoli , Proteínas Supressoras de Tumor , Proteínas de Sinalização YAP , Animais , Células de Sertoli/metabolismo , Proteínas Serina-Treonina Quinases/metabolismo , Proteínas Serina-Treonina Quinases/genética , Masculino , Camundongos , Proteínas de Sinalização YAP/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas Supressoras de Tumor/metabolismo , Proteínas Supressoras de Tumor/genética , Diferenciação Celular/fisiologia , Camundongos Knockout , Transdução de Sinais , Proteínas de Ciclo Celular/metabolismo , Proteínas de Ciclo Celular/genética , Testículo/metabolismo , Transição Epitelial-Mesenquimal/fisiologia , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Aciltransferases/genética , Aciltransferases/metabolismo , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Transativadores/metabolismo , Transativadores/genética
9.
Genes Chromosomes Cancer ; 63(5): e23244, 2024 05.
Artigo em Inglês | MEDLINE | ID: mdl-38747338

RESUMO

We describe a case of a pleomorphic adenoma (PA) arising from the para-tracheal accessory salivary gland in a 44-year-old male harboring a novel WWTR1::NCOA2 gene fusion. To our knowledge, this novel gene fusion has not been described previously in salivary gland tumors. The patient presented with hoarseness of voice. The radiological exam revealed a mass in the upper third of the trachea involving the larynx. Histologically, the tumor consisted of bland-looking monocellular eosinophilic epithelial cells arranged in cords and sheets separated by thin fibrous stroma, focally forming a pseudo-tubular pattern. In immunohistochemistry, the tumor cells demonstrated positivity for CK7, PS100, SOX10, and HMGA2; and negativity for CK5/6, p40 p63, and PLAG1. In addition, the clustering analysis clearly demonstrates a clustering of tumors within the PA group. In addition to reporting this novel fusion in the PA spectrum, we discuss the relevant differential diagnoses and briefly review of NCOA2 and WWTR1 gene functions in normal and neoplastic contexts.


Assuntos
Proteína HMGA2 , Coativador 2 de Receptor Nuclear , Transativadores , Humanos , Masculino , Coativador 2 de Receptor Nuclear/genética , Coativador 2 de Receptor Nuclear/metabolismo , Adulto , Proteína HMGA2/genética , Proteína HMGA2/metabolismo , Transativadores/genética , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Neoplasias das Glândulas Salivares/genética , Neoplasias das Glândulas Salivares/patologia , Neoplasias das Glândulas Salivares/metabolismo , Peptídeos e Proteínas de Sinalização Intracelular/genética , Proteínas de Fusão Oncogênica/genética , Mioepitelioma/genética , Mioepitelioma/patologia , Mioepitelioma/metabolismo
10.
Int J Biol Macromol ; 271(Pt 2): 132473, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38795886

RESUMO

Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ) serve as transcriptional co-activators that dynamically shuttle between the cytoplasm and nucleus, resulting in either the suppression or enhancement of their downstream gene expression. Recent emerging evidence demonstrates that YAP/TAZ is strongly implicated in the pathophysiological processes that contribute to cardiovascular diseases (CVDs). In the cardiovascular system, YAP/TAZ is involved in the orchestration of a range of biological processes such as oxidative stress, inflammation, proliferation, and autophagy. Furthermore, YAP/TAZ has been revealed to be closely associated with the initiation and development of various cardiovascular diseases, including atherosclerosis, pulmonary hypertension, myocardial fibrosis, cardiac hypertrophy, and cardiomyopathy. In this review, we delve into recent studies surrounding YAP and TAZ, along with delineating their roles in contributing to the pathogenesis of CVDs with a link to various physiological processes in the cardiovascular system. Additionally, we highlight the current potential drugs targeting YAP/TAZ for CVDs therapy and discuss their challenges for translational application. Overall, this review may offer novel insights for understanding and treating cardiovascular disorders.


Assuntos
Doenças Cardiovasculares , Transdução de Sinais , Proteínas de Sinalização YAP , Humanos , Doenças Cardiovasculares/metabolismo , Proteínas de Sinalização YAP/metabolismo , Animais , Fatores de Transcrição/metabolismo , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Proteínas Adaptadoras de Transdução de Sinal/metabolismo
11.
Nat Commun ; 15(1): 4052, 2024 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-38744820

RESUMO

Obesity has emerged as a prominent risk factor for the development of malignant tumors. However, the existing literature on the role of adipocytes in the tumor microenvironment (TME) to elucidate the correlation between obesity and cancer remains insufficient. Here, we aim to investigate the formation of cancer-associated adipocytes (CAAs) and their contribution to tumor growth using mouse models harboring dysfunctional adipocytes. Specifically, we employ adipocyte-specific BECN1 KO (BaKO) mice, which exhibit lipodystrophy due to dysfunctional adipocytes. Our results reveal the activation of YAP/TAZ signaling in both CAAs and BECN1-deficient adipocytes, inducing adipocyte dedifferentiation and formation of a malignant TME. The additional deletion of YAP/TAZ from BaKO mice significantly restores the lipodystrophy and inflammatory phenotypes, leading to tumor regression. Furthermore, mice fed a high-fat diet (HFD) exhibit decreased BECN1 and increased YAP/TAZ expression in their adipose tissues. Treatment with the YAP/TAZ inhibitor, verteporfin, suppresses tumor progression in BaKO and HFD-fed mice, highlighting its efficacy against mice with metabolic dysregulation. Overall, our findings provide insights into the key mediators of CAA and their significance in developing a TME, thereby suggesting a viable approach targeting adipocyte homeostasis to suppress cancer growth.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Adipócitos , Dieta Hiperlipídica , Camundongos Knockout , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Microambiente Tumoral , Proteínas de Sinalização YAP , Animais , Camundongos , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Adipócitos/metabolismo , Adipócitos/patologia , Proteínas de Ciclo Celular/metabolismo , Proteínas de Ciclo Celular/genética , Transformação Celular Neoplásica/metabolismo , Transformação Celular Neoplásica/genética , Transformação Celular Neoplásica/patologia , Dieta Hiperlipídica/efeitos adversos , Progressão da Doença , Lipodistrofia/metabolismo , Lipodistrofia/patologia , Lipodistrofia/genética , Camundongos Endogâmicos C57BL , Neoplasias/metabolismo , Neoplasias/patologia , Neoplasias/genética , Obesidade/metabolismo , Obesidade/patologia , Transdução de Sinais , Transativadores/metabolismo , Transativadores/genética , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Verteporfina/farmacologia , Proteínas de Sinalização YAP/metabolismo
12.
Thyroid ; 34(7): 942-948, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38757609

RESUMO

Background: Brain-lung-thyroid syndrome (BLTS) is caused by NKX2-1 haploinsufficiency, resulting in chorea/choreoathetosis, respiratory problems, and hypothyroidism. Genes interacting with NKX2-1 mutants influence its phenotypic variability. We report a novel NKX2-1 missense variant and the modifier function of TAZ/WWTR1 in BLTS. Methods: A child with BLTS underwent next-generation sequencing panel testing for thyroid disorders. His family was genotyped for NKX2-1 variants and screened for germline mosaicism. Mutant NKX2-1 was generated, and transactivation assays were performed on three NKX2-1 target gene promoters. DNA binding capacity and protein-protein interaction were analyzed. Results: The patient had severe BLTS and carried a novel missense variant c.632A>G (p.N211S) in NKX2-1, which failed to bind to specific DNA promoters, reducing their transactivation. TAZ cotransfection did not significantly increase transcription of these genes, although the variant retained its ability to bind to TAZ. Conclusions: We identify a novel pathogenic NKX2-1 variant that causes severe BLTS and is inherited through germline mosaicism. The mutant lacks DNA-binding capacity, impairing transactivation and suggesting that NKX2-1 binding to DNA is essential for TAZ-mediated transcriptional rescue.


Assuntos
Mutação de Sentido Incorreto , Fator Nuclear 1 de Tireoide , Transativadores , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Humanos , Masculino , Fator Nuclear 1 de Tireoide/genética , Fator Nuclear 1 de Tireoide/metabolismo , Transativadores/genética , Ativação Transcricional , Coreia/genética , Fatores de Transcrição/genética , Peptídeos e Proteínas de Sinalização Intracelular/genética , Atetose , Hipotireoidismo Congênito , Síndrome do Desconforto Respiratório do Recém-Nascido
13.
Nat Metab ; 6(5): 847-860, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38811804

RESUMO

Adipose tissues serve as an energy reservoir and endocrine organ, yet the mechanisms that coordinate these functions remain elusive. Here, we show that the transcriptional coregulators, YAP and TAZ, uncouple fat mass from leptin levels and regulate adipocyte plasticity to maintain metabolic homeostasis. Activating YAP/TAZ signalling in adipocytes by deletion of the upstream regulators Lats1 and Lats2 results in a profound reduction in fat mass by converting mature adipocytes into delipidated progenitor-like cells, but does not cause lipodystrophy-related metabolic dysfunction, due to a paradoxical increase in circulating leptin levels. Mechanistically, we demonstrate that YAP/TAZ-TEAD signalling upregulates leptin expression by directly binding to an upstream enhancer site of the leptin gene. We further show that YAP/TAZ activity is associated with, and functionally required for, leptin regulation during fasting and refeeding. These results suggest that adipocyte Hippo-YAP/TAZ signalling constitutes a nexus for coordinating adipose tissue lipid storage capacity and systemic energy balance through the regulation of adipocyte plasticity and leptin gene transcription.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Adipócitos , Tecido Adiposo , Metabolismo Energético , Via de Sinalização Hippo , Leptina , Proteínas Serina-Treonina Quinases , Transdução de Sinais , Proteínas de Sinalização YAP , Animais , Leptina/metabolismo , Proteínas Serina-Treonina Quinases/metabolismo , Camundongos , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Proteínas de Sinalização YAP/metabolismo , Tecido Adiposo/metabolismo , Adipócitos/metabolismo , Proteínas de Ciclo Celular/metabolismo , Proteínas de Ciclo Celular/genética , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Fosfoproteínas/metabolismo , Fosfoproteínas/genética , Proteínas Supressoras de Tumor/metabolismo , Proteínas Supressoras de Tumor/genética , Transativadores/metabolismo , Transativadores/genética
14.
J Cell Sci ; 137(10)2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38813860

RESUMO

WW domain-containing transcription regulator 1 (WWTR1, referred to here as TAZ) and Yes-associated protein (YAP, also known as YAP1) are transcriptional co-activators traditionally studied together as a part of the Hippo pathway, and are best known for their roles in stem cell proliferation and differentiation. Despite their similarities, TAZ and YAP can exert divergent cellular effects by differentially interacting with other signaling pathways that regulate stem cell maintenance or differentiation. In this study, we show in mouse neural stem and progenitor cells (NPCs) that TAZ regulates astrocytic differentiation and maturation, and that TAZ mediates some, but not all, of the effects of bone morphogenetic protein (BMP) signaling on astrocytic development. By contrast, both TAZ and YAP mediate the effects on NPC fate of ß1-integrin (ITGB1) and integrin-linked kinase signaling, and these effects are dependent on extracellular matrix cues. These findings demonstrate that TAZ and YAP perform divergent functions in the regulation of astrocyte differentiation, where YAP regulates cell cycle states of astrocytic progenitors and TAZ regulates differentiation and maturation from astrocytic progenitors into astrocytes.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Astrócitos , Diferenciação Celular , Proliferação de Células , Células-Tronco Neurais , Transdução de Sinais , Transativadores , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Proteínas de Sinalização YAP , Animais , Astrócitos/metabolismo , Astrócitos/citologia , Proteínas de Sinalização YAP/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Camundongos , Células-Tronco Neurais/metabolismo , Células-Tronco Neurais/citologia , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Transativadores/metabolismo , Transativadores/genética , Fosfoproteínas/metabolismo , Fosfoproteínas/genética , Proteínas de Ciclo Celular/metabolismo , Proteínas de Ciclo Celular/genética , Integrina beta1/metabolismo , Integrina beta1/genética , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Proteínas Morfogenéticas Ósseas/metabolismo , Córtex Cerebral/citologia , Córtex Cerebral/metabolismo , Proteínas Serina-Treonina Quinases
15.
Int J Biol Sci ; 20(7): 2592-2606, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38725855

RESUMO

Transcriptional coactivator with a PDZ-binding motif (TAZ) plays a key role in normal tissue homeostasis and tumorigenesis through interaction with several transcription factors. In particular, TAZ deficiency causes abnormal alveolarization and emphysema, and persistent TAZ overexpression contributes to lung cancer and pulmonary fibrosis, suggesting the possibility of a complex mechanism of TAZ function. Recent studies suggest that nuclear factor erythroid 2-related factor 2 (NRF2), an antioxidant defense system, induces TAZ expression during tumorigenesis and that TAZ also activates the NRF2-mediated antioxidant pathway. We thus thought to elucidate the cross-regulation of TAZ and NRF2 and the underlying molecular mechanisms and functions. TAZ directly interacted with NRF2 through the N-terminal domain and suppressed the transcriptional activity of NRF2 by preventing NRF2 from binding to DNA. In addition, the return of NRF2 to basal levels after signaling was inhibited in TAZ deficiency, resulting in sustained nuclear NRF2 levels and aberrantly increased expression of NRF2 targets. TAZ deficiency failed to modulate optimal NRF2 signaling and concomitantly impaired lysosomal acidification and lysosomal enzyme function, accumulating the abnormal autophagy vesicles and reactive oxygen species and causing protein oxidation and cellular damage in the lungs. TAZ restoration to TAZ deficiency normalized dysregulated NRF2 signaling and aberrant lysosomal function and triggered the normal autophagy-lysosomal pathway. Therefore, TAZ is indispensable for the optimal regulation of NRF2-mediated autophagy-lysosomal pathways and for preventing pulmonary damage caused by oxidative stress and oxidized proteins.


Assuntos
Autofagia , Lisossomos , Fator 2 Relacionado a NF-E2 , Fator 2 Relacionado a NF-E2/metabolismo , Autofagia/fisiologia , Lisossomos/metabolismo , Animais , Camundongos , Humanos , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Transdução de Sinais , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Espécies Reativas de Oxigênio/metabolismo , Proteínas Adaptadoras de Transdução de Sinal
16.
Trends Cell Biol ; 34(7): 566-577, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38806345

RESUMO

Biomolecular condensates, the membraneless cellular compartments formed by liquid-liquid phase separation (LLPS), represent an important mechanism for physiological and tumorigenic processes. Recent studies have advanced our understanding of how these condensates formed in the cytoplasm or nucleus regulate Hippo signaling, a central player in organogenesis and tumorigenesis. Here, we review recent findings on the dynamic formation and function of biomolecular condensates in regulating the Hippo-yes-associated protein (YAP)/transcription coactivator with PDZ-binding motif (TAZ) signaling pathway under physiological and pathological processes. We further discuss how the nuclear condensates of YAP- or TAZ-fusion oncoproteins compartmentalize crucial transcriptional co-activators and alter chromatin architecture to promote oncogenic programs. Finally, we highlight key questions regarding how these findings may pave the way for novel therapeutics to target cancer.


Assuntos
Via de Sinalização Hippo , Neoplasias , Proteínas Serina-Treonina Quinases , Transdução de Sinais , Fatores de Transcrição , Humanos , Neoplasias/metabolismo , Neoplasias/patologia , Proteínas Serina-Treonina Quinases/metabolismo , Fatores de Transcrição/metabolismo , Fatores de Transcrição/química , Animais , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/química , Proteínas de Sinalização YAP/metabolismo , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo
17.
BMC Cancer ; 24(1): 587, 2024 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-38741073

RESUMO

YAP and TAZ, the Hippo pathway terminal transcriptional activators, are frequently upregulated in cancers. In tumor cells, they have been mainly associated with increased tumorigenesis controlling different aspects from cell cycle regulation, stemness, or resistance to chemotherapies. In fewer cases, they have also been shown to oppose cancer progression, including by promoting cell death through the action of the p73/YAP transcriptional complex, in particular after chemotherapeutic drug exposure. Using HCT116 cells, we show here that oxaliplatin treatment led to core Hippo pathway down-regulation and nuclear accumulation of TAZ. We further show that TAZ was required for the increased sensitivity of HCT116 cells to oxaliplatin, an effect that appeared independent of p73, but which required the nuclear relocalization of TAZ. Accordingly, Verteporfin and CA3, two drugs affecting the activity of YAP and TAZ, showed antagonistic effects with oxaliplatin in co-treatments. Importantly, using several colorectal cell lines, we show that the sensitizing action of TAZ to oxaliplatin is dependent on the p53 status of the cells. Our results support thus an early action of TAZ to sensitize cells to oxaliplatin, consistent with a model in which nuclear TAZ in the context of DNA damage and p53 activity pushes cells towards apoptosis.


Assuntos
Antineoplásicos , Neoplasias do Colo , Via de Sinalização Hippo , Oxaliplatina , Proteínas Serina-Treonina Quinases , Transdução de Sinais , Transativadores , Fatores de Transcrição , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Proteína Supressora de Tumor p53 , Humanos , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Neoplasias do Colo/tratamento farmacológico , Neoplasias do Colo/metabolismo , Neoplasias do Colo/patologia , Neoplasias do Colo/genética , Proteínas de Ligação a DNA/metabolismo , Proteínas de Ligação a DNA/genética , Resistencia a Medicamentos Antineoplásicos/genética , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Células HCT116 , Via de Sinalização Hippo/efeitos dos fármacos , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Peptídeos e Proteínas de Sinalização Intracelular/genética , Proteínas Nucleares/metabolismo , Proteínas Nucleares/genética , Compostos Organoplatínicos/farmacologia , Compostos Organoplatínicos/uso terapêutico , Oxaliplatina/farmacologia , Porfirinas/farmacologia , Proteínas Serina-Treonina Quinases/metabolismo , Proteínas Serina-Treonina Quinases/genética , Transdução de Sinais/efeitos dos fármacos , Transativadores/metabolismo , Transativadores/genética , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Proteína Tumoral p73/metabolismo , Proteína Tumoral p73/genética , Proteína Supressora de Tumor p53/metabolismo , Proteína Supressora de Tumor p53/genética , Proteínas Supressoras de Tumor/metabolismo , Proteínas Supressoras de Tumor/genética , Verteporfina/farmacologia , Verteporfina/uso terapêutico , Proteínas de Sinalização YAP/metabolismo
18.
J Cell Sci ; 137(10)2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38639242

RESUMO

WW domain-containing transcription regulator 1 (WWTR1, referred to here as TAZ) and Yes-associated protein (YAP, also known as YAP1) are transcriptional co-activators traditionally studied together as a part of the Hippo pathway, and are best known for their roles in stem cell proliferation and differentiation. Despite their similarities, TAZ and YAP can exert divergent cellular effects by differentially interacting with other signaling pathways that regulate stem cell maintenance or differentiation. In this study, we show in mouse neural stem and progenitor cells (NPCs) that TAZ regulates astrocytic differentiation and maturation, and that TAZ mediates some, but not all, of the effects of bone morphogenetic protein (BMP) signaling on astrocytic development. By contrast, both TAZ and YAP mediate the effects on NPC fate of ß1-integrin (ITGB1) and integrin-linked kinase signaling, and these effects are dependent on extracellular matrix cues. These findings demonstrate that TAZ and YAP perform divergent functions in the regulation of astrocyte differentiation, where YAP regulates cell cycle states of astrocytic progenitors and TAZ regulates differentiation and maturation from astrocytic progenitors into astrocytes.


Assuntos
Proteínas Adaptadoras de Transdução de Sinal , Astrócitos , Diferenciação Celular , Proliferação de Células , Células-Tronco Neurais , Transdução de Sinais , Transativadores , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Proteínas de Sinalização YAP , Animais , Astrócitos/metabolismo , Astrócitos/citologia , Proteínas de Sinalização YAP/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/metabolismo , Proteínas Adaptadoras de Transdução de Sinal/genética , Camundongos , Células-Tronco Neurais/metabolismo , Células-Tronco Neurais/citologia , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Transativadores/metabolismo , Transativadores/genética , Fosfoproteínas/metabolismo , Fosfoproteínas/genética , Proteínas de Ciclo Celular/metabolismo , Proteínas de Ciclo Celular/genética , Integrina beta1/metabolismo , Integrina beta1/genética , Fatores de Transcrição/metabolismo , Fatores de Transcrição/genética , Proteínas Morfogenéticas Ósseas/metabolismo , Córtex Cerebral/citologia , Córtex Cerebral/metabolismo , Proteínas Serina-Treonina Quinases
19.
Pharmacol Res ; 203: 107167, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38599470

RESUMO

Cancer has become a burgeoning global healthcare concern marked by its exponential growth and significant economic ramifications. Though advancements in the treatment modalities have increased the overall survival and quality of life, there are no definite treatments for the advanced stages of this malady. Hence, understanding the diseases etiologies and the underlying molecular complexities, will usher in the development of innovative therapeutics. Recently, YAP/TAZ transcriptional regulation has been of immense interest due to their role in development, tissue homeostasis and oncogenic transformations. YAP/TAZ axis functions as coactivators within the Hippo signaling cascade, exerting pivotal influence on processes such as proliferation, regeneration, development, and tissue renewal. In cancer, YAP is overexpressed in multiple tumor types and is associated with cancer stem cell attributes, chemoresistance, and metastasis. Activation of YAP/TAZ mirrors the cellular "social" behavior, encompassing factors such as cell adhesion and the mechanical signals transmitted to the cell from tissue structure and the surrounding extracellular matrix. Therefore, it presents a significant vulnerability in the clogs of tumors that could provide a wide window of therapeutic effectiveness. Natural compounds have been utilized extensively as successful interventions in the management of diverse chronic illnesses, including cancer. Owing to their capacity to influence multiple genes and pathways, natural compounds exhibit significant potential either as adjuvant therapy or in combination with conventional treatment options. In this review, we delineate the signaling nexus of YAP/TAZ axis, and present natural compounds as an alternate strategy to target cancer.


Assuntos
Neoplasias , Fatores de Transcrição , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional , Proteínas de Sinalização YAP , Animais , Humanos , Antineoplásicos/uso terapêutico , Antineoplásicos/farmacologia , Produtos Biológicos/uso terapêutico , Produtos Biológicos/farmacologia , Neoplasias/tratamento farmacológico , Neoplasias/metabolismo , Neoplasias/patologia , Transdução de Sinais/efeitos dos fármacos , Transativadores/metabolismo , Fatores de Transcrição/metabolismo , Proteínas com Motivo de Ligação a PDZ com Coativador Transcricional/metabolismo , Proteínas de Sinalização YAP/metabolismo
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