Review
Biochemistry & Molecular Biology
Ewa Brzozowska, Sameer Deshmukh
Summary: Integrins are crucial for cell adhesion, migration, and positioning. Studies have shown that the expression levels of Integrin αVβ6 are closely related to malignant diseases and patient prognosis. It plays a significant role in cancer progression and the activation of transforming growth factor β(TGF-β). While essential for normal function in healthy individuals, it can also be a target for cancer treatment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Oncology
Haijie Xiao, Haifeng Zhu, Oliver Boegler, Fabiola Zakia Monica, Alexander Y. Y. Kots, Ferid Murad, Ka Bian
Summary: Malignant glioma, the most common and deadly brain tumor, can be suppressed by the expression of sGC beta 1, which is independent of the enzymatic activity and level of cyclic GMP of sGC. sGC beta 1 interacts with the promoter of the TP53 gene, causing G0 cell cycle arrest and inhibiting tumor aggressiveness. Overexpression of sGC beta 1 also affects glioblastoma signaling pathways, including promoting nuclear accumulation of p53, reducing CDK6 expression, and decreasing integrin alpha 6 levels. These findings suggest that sGC beta 1 may be a potential therapeutic target for cancer treatment.
Article
Oncology
Marius Kemper, Alina Schiecke, Hanna Maar, Sergey Nikulin, Andrey Poloznikov, Vladimir Galatenko, Michael Tachezy, Florian Gebauer, Tobias Lange, Kristoffer Riecken, Alexander Tonevitsky, Achim Aigner, Jakob Izbicki, Udo Schumacher, Daniel Wicklein
Summary: The knockdown of ITGAV in PDA cells significantly reduces primary tumor growth, peritoneal carcinomatosis, and spontaneous pulmonary metastasis. ITGAV activates latent TGF-beta and drives epithelial-mesenchymal transition. Combined depletion of ITGAV on tumor cells and E- and P-selectins in the tumor-host almost abolishes intraperitoneal spread.
JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Lijun Zhong, Lin Tang, Xiaoxia He
Summary: It has been discovered that ANGPTL3 plays an oncogenic role in several types of human malignancies. This study found that ANGPTL3 is highly expressed in cervical cancer cells and silencing ANGPTL3 can inhibit cell proliferation, migration, invasion, and angiogenesis. The inhibitory effect of ANGPTL3 can be offset by upregulating the expression of alpha v beta 3, which also promotes blood vessel formation and the secretion of VEGF and VEGFR2 in cervical cancer cells.
Article
Oncology
Dengfeng Li, Chengyan Dong, Xiaohong Ma, Xinming Zhao
Summary: Nanoprobes based on RXDLXXL motifs can specifically image integrin alpha(v)beta(6), a protein overexpressed in various tumors. The integration of cFK-9-USPIO in MRI imaging showed significant potential in detecting breast cancer overexpressing alpha(v)beta(6).
Article
Medicine, Research & Experimental
Hila Shaim, Mayra Shanley, Rafet Basar, May Daher, Joy Gumin, Daniel B. Zamler, Nadima Uprety, Fang Wang, Yuefan Huang, Konrad Gabrusiewicz, Qi Miao, Jinzhuang Dou, Abdullah Alsuliman, Lucila N. Kerbauy, Sunil Acharya, Vakul Mohanty, Mayela Mendt, Sufang Li, JunJun Lu, Jun Wei, Natalie W. Fowlkes, Elif Gokdemir, Emily L. Ensley, Mecit Kaplan, Cynthia Kassab, Li Li, Gonca Ozcan, Pinaki P. Banerjee, Yifei Shen, April L. Gilbert, Corry M. Jones, Mustafa Bdiwi, Ana K. Nunez-Cortes, Enli Liu, Jun Yu, Nobuhiko Imahashi, Luis Muniz-Feliciano, Ye Li, Jian Hu, Giulio Draetta, David Marin, Dihua Yu, Stephan Mielke, Matthias Eyrich, Richard E. Champlin, Ken Chen, Frederick F. Lang, Elizabeth J. Shpall, Amy B. Heimberger, Katayoun Rezvani
Summary: Glioblastoma stem cells (GSCs) in the aggressive brain cancer Glioblastoma multiforme (GBM) evade immune responses by impairing the function of tumor-infiltrating NK cells through a direct cell-to-cell contact mechanism mediated by alpha v integrin and TGF-β activation. Treatment with inhibitors of integrin or TGF-β signaling, or with TGFBR2 gene-edited allogeneic NK cells, prevents GSC-induced NK cell dysfunction and tumor growth, suggesting a potential therapeutic strategy for GBM.
JOURNAL OF CLINICAL INVESTIGATION
(2021)
Article
Oncology
Irina Korovina, Anne Vehlow, Achim Temme, Nils Cordes
Summary: Integrin alpha 2 is overexpressed in GBM compared to normal brain, and its deletion causes radiochemosensitization and reduces invasion and adhesion in GBM cells post TMZ-irradiation. Knockdown of integrin alpha 2 impairs cell proliferation without affecting DNA damage repair, and it affects ATF1 activity and modulates ERK1 expression regulated by external signals. Integrin alpha 2-deficiency inhibits tumor growth and extends survival in mice with orthotopically growing GBM xenografts.
Article
Biology
Jing Li, Jiabin Yan, Timothy A. Springer
Summary: Research shows that the low-affinity states of integrins bind ligand more rapidly than high-affinity states, suggesting that low-affinity states are more common on cell surfaces. This indicates that integrin binding to ligand may occur before activation by 'inside-out signaling.'
Article
Pharmacology & Pharmacy
Gavin E. Morris, Matthew J. Denniff, Elisavet Karamanavi, Sarah A. Andrews, Renata B. Kostogrys, Vasiliki Bountziouka, Maryam Ghaderi-Najafabadi, Noor Shamkhi, George McConnell, Michael A. Kaiser, Laura Carleton, Christine Schofield, Thorsten Kessler, Richard D. Rainbow, Nilesh J. Samani, Thomas R. Webb
Summary: The study reveals a novel role for SVEP1 and the integrins alpha 4 beta 1 and alpha 9 beta 1 in reducing VSMC contractility. Inhibition of these proteins significantly enhances calcium levels in VSMCs and leads to increased vessel contraction, mediated via VGCCs, PKC, and Rho A/Rho kinase dependent mechanisms.
BRITISH JOURNAL OF PHARMACOLOGY
(2022)
Article
Chemistry, Medicinal
Bruce A. Hay, Kavitha Godugu, Noureldien H. E. Darwish, Kazutoshi Fujioka, Thangirala Sudha, Ozlem Ozen Karakus, Shaker A. Mousa
Summary: The newly discovered fb-PMT can significantly reduce GBM tumor growth and viability by up to 98%, is suitable for large-scale synthesis, and can be analyzed using mass spectrometry-based detection.
JOURNAL OF MEDICINAL CHEMISTRY
(2021)
Article
Oncology
Guixi Zheng, Hakim Bouamar, Matyas Cserhati, Carla R. Zeballos, Isha Mehta, Habil Zare, Larry Broome, Ruolei Hu, Zhao Lai, Yidong Chen, Francis E. Sharkey, Meenakshi Rani, Glenn A. Halff, Francisco G. Cigarroa, Lu-Zhe Sun
Summary: The study found that ITGA6 is upregulated in HCC tumors and has a malignant promoting role in HCC cells through integrin alpha 6 beta 4 complex. Thus, integrin alpha 6 beta 4 may be a therapeutic target for treating HCC patients.
INTERNATIONAL JOURNAL OF CANCER
(2022)
Article
Medicine, Research & Experimental
Peng Peng, Hongtao Zhu, Dan Liu, Zirong Chen, Xiaolin Zhang, Zhongyin Guo, Minhai Dong, Lijun Wan, Po Zhang, Guohao Liu, Suojun Zhang, Fangyong Dong, Feng Hu, Fangling Cheng, Shijun Huang, Dongsheng Guo, Bin Zhang, Xingjiang Yu, Feng Wan
Summary: TGFBI, specifically expressed by tumor-associated macrophages (TAMs), plays a role in promoting glioma stem cells (GSCs) maintenance and tumor growth. The exact mechanism involves integrin alpha v beta 5-Src-Stat3 signaling pathway.
Article
Multidisciplinary Sciences
Dan-yang Guo, Zhong-hua Chen, Yi-fei Fu, Yue-yue Li, Meng-nan Chen, Jun-jie Wu, Zheng-dong Yuan, Jun-Xing Ye, Xia Li, Feng-lai Yuan
Summary: By blocking the signaling pathway of integrin alpha(v)beta(3), cilengitide effectively inhibits the functionality and formation of osteoclasts, resulting in diminished adhesion and bone resorption. The expression of key signaling molecules associated with the osteoclast cytoskeleton are downregulated by cilengitide.
Article
Biochemistry & Molecular Biology
Jingyi Zhu, Wenjuan Li, Jian Jing
Summary: Tumor tissues exhibit unique integrin receptor presentation during development, which can be targeted for antitumor therapy. A novel fusion protein called Echistatin-Annexin V (EAV) was developed, which showed strong inhibitory effects on melanoma tumor cells and angiogenesis in mouse models. The unique biological effects of EAV are based on its high selectivity for specific integrin receptors and its ability to bind to phosphatidylserine molecules. EAV-mediated tumor suppression provides a possible mechanism for the treatment of melanoma.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Editorial Material
Radiology, Nuclear Medicine & Medical Imaging
Somit Pandey, Rama Walia, Rajender Kumar, Sejal Chopra, Nivedita Rana, Debajyoti Chatterjee, Stanley Satz, Bhagwant Rai Mittal, Jaya Shukla
Summary: Adrenocortical carcinoma (ACC) is a rare malignancy with limited treatment options. In this study, Ga-68-DOTAGA-IAC PET/CT imaging was used to noninvasively examine ACC patients, showing promising results for metastatic and recurrent cases. This technique could potentially serve as a valuable radiotracer for ACC.
CLINICAL NUCLEAR MEDICINE
(2023)
Review
Biophysics
Bernard Lanz, Alireza Abaei, Olivier Braissant, In-Young Choi, Cristina Cudalbu, Pierre-Gilles Henry, Rolf Gruetter, Firat Kara, Kejal Kantarci, Phil Lee, Norbert W. Lutz, Malorzata Marjanska, Vladimir Mlynarik, Volker Rasche, Lijing Xin, Julien Valette
Summary: In vivo MRS is a non-invasive measurement technique used in humans and animal models to study metabolite concentrations, metabolic rates, and modifications. In preclinical studies, rodent models are used to study brain metabolism, providing additional biochemical information compared to clinical studies. High-field preclinical MRS has its own properties and technical limitations.
NMR IN BIOMEDICINE
(2021)
Article
Biophysics
Guglielmo Genovese, Marco Palombo, Mathieu D. Santin, Julien Valette, Clemence Ligneul, Marie-Stephane Aigrot, Nasteho Abdoulkader, Dominique Langui, Aymeric Millecamps, Anne Baron-Van Evercooren, Bruno Stankoff, Stephane Lehericy, Alexandra Petiet, Francesca Branzoli
Summary: Research has shown that diffusion of mIns and tCho plays a significant role in assessing glial changes induced by inflammation, making it a promising diagnostic tool for accurately detecting glial cell alterations under pathological conditions.
NMR IN BIOMEDICINE
(2021)
Article
Biophysics
Melissa Vincent, Mylene Gaudin, Covadonga Lucas-Torres, Alan Wong, Carole Escartin, Julien Valette
Summary: The study investigates the diffusion properties of extracellular spaces in the brain using exogenous probes, showing that the diffusion behavior of sucrose is notably different from that of intracellular metabolites. Results suggest that diffusion in ECS is not fully Gaussian at high b values.
NMR IN BIOMEDICINE
(2021)
Article
Biochemical Research Methods
Eloise Mougel, Sophie Malaquin, Melissa Vincent, Julien Valette
Summary: The use of diffusion-weighted spin echo block and spectrally selective refocusing pulses can effectively suppress J-coupling effects, leading to approximately two-fold increase in lactate signal. Repeated measurements confirm that lactate diffusion-weighted signal attenuation is measured with an approximately twofold precision.
JOURNAL OF MAGNETIC RESONANCE
(2022)
Article
Clinical Neurology
Carine Chassain, Aurelie Cladiere, Camille Tsoutsos, Bruno Pereira, Fawzi Boumezbeur, Berangere Debilly, Ana-Raquel Marques, Stephane Thobois, Franck Durif
Summary: De novo Parkinson's disease patients show elevated glutamine levels in the putamen, and glutamate and glutamine concentrations are also higher in the more affected hemisphere compared to the contralateral side.
PARKINSONISM & RELATED DISORDERS
(2022)
Article
Chemistry, Multidisciplinary
Andre Ferreira, Ricardo Magalhaes, Sebastien Meriaux, Victor Alves
Summary: The study successfully generated realistic MRI scans of the rat brain using an adapted Generative Adversarial Networks architecture. The generated scans were evaluated using various quantitative metrics, a Turing test, and a segmentation test, demonstrating their realism and applicability. The research also showed that using the generated data improved the segmentation model more than traditional data augmentation.
APPLIED SCIENCES-BASEL
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Eloise Mougel, Sophie Malaquin, Julien Valette
Summary: Diffusion and T-2 relaxation in the rodent brain show little or no correlation for intracellular metabolites, except for lactate which exhibits different diffusion properties. A new diffusion sequence is used to investigate the potential T-2 dependence on lactate diffusion in the mouse brain, and it is found that there is no significant TE dependence of diffusivity and kurtosis for lactate.
MAGNETIC RESONANCE IN MEDICINE
(2022)
Article
Neurosciences
Ileana O. Jelescu, Alexandre de Skowronski, Francoise Geffroy, Marco Palombo, Dmitry S. Novikov
Summary: Research focuses on diffusion MRI in gray matter, proposing Neurite Exchange Imaging (NEXI) as a more suitable model, with in vivo experiments showing the essential role of water exchange in interpreting diffusion MRI measurements in gray matter.
Article
Multidisciplinary Sciences
Alban Guesdon-Vennerie, Patrick Couvreur, Fatoumia Ali, Frederic Pouzoulet, Christophe Roulin, Immaculada Martinez-Rovira, Guillaume Bernadat, Francois-Xavier Legrand, Claudie Bourgaux, Cyril Lucien Mazars, Sergio Marco, Sylvain Trepout, Simona Mura, Sebastien Meriaux, Guillaume Bort
Summary: The study introduces a strategy for photosensitive-system activation in biological tissues without depth restriction, using high-energy stimuli for energy transfer and local energy conversion for molecular activation. A radiation-responsive molecular system is developed to trigger cytotoxic effect on cancer cells upon gamma-ray irradiation, paving the way for deep tissue triggered therapeutic applications.
NATURE COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Allegra Conti, Francoise Geffroy, Hermes A. S. Kamimura, Anthony Novell, Nicolas Tournier, Sebastien Meriaux, Benoit Larrat
Summary: The blood-brain barrier, formed by vascular endothelial cells, maintains brain homeostasis by limiting the passage of molecules. Focused ultrasound with microbubbles can temporarily disrupt the blood-brain barrier. This study found that moderate acoustic pressures can decrease P-gp expression and increase BCRP expression in the brain.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Neurosciences
Arnaud Messe, Karl J. Hollensteiner, Celine Delettre, Leigh-Anne Dell-Brown, Florian Pieper, Lena J. Nentwig, Edgar E. Galindo-Leon, Benoit Larrat, Sebastien Meriaux, Jean-Francois Mangin, Isabel Reillo, Camino de Juan Romero, Victor Borrell, Gerhard Engler, Roberto Toro, Andreas K. Engel, Claus C. Hilgetag
Summary: Intrinsic coupling modes (ICMs) in ongoing brain activity are related to the underlying structural connectivity in the cerebral cortex, with phase and envelope ICMs showing different degrees of correlation. The relationship between structural connectivity and ICMs is influenced by frequency and delay. Computational models can provide predictions for both types of ICMs, although results are dependent on specific parameter settings. Measures solely based on structural connectivity yield the most consistent predictions.
Review
Engineering, Biomedical
Paul Mondou, Sebastien Meriaux, Florent Nageotte, Jonathan Vappou, Anthony Novell, Benoit Larrat
Summary: This review summarizes the current state of in vitro and in vivo cavitation control algorithms for blood-brain barrier (BBB) permeabilization using microbubbles (MB) and focused ultrasound (FUS). It describes the different cavitation states, the indexes used for ultrasonic monitoring, and the various control strategies for BBB permeabilization.
PHYSICS IN MEDICINE AND BIOLOGY
(2023)
Meeting Abstract
Pharmacology & Pharmacy
C. Mallet, D. A. Barriere, F. Boumezbeur, R. Dalmann, R. Caddedu, D. Richard, J. Pinguet, L. Daulhac, P. Sarret, K. Whittingstall, M. Keller, S. Meriaux, A. Eschalier
FUNDAMENTAL & CLINICAL PHARMACOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Lucie Jamgotchian, Solenne Vaillant, Erwan Selingue, Anaelle Doerflinger, Agathe Belime, Marie Vandamme, Guillaume Pinna, Wai Li Ling, Edmond Gravel, Sebastien Meriaux, Eric Doris
Summary: In this study, a tailor-made micellar carrier system was assembled and evaluated for efficient encapsulation of a superfluorinated MRI probe and targeting solid tumors. In vivo validation on MC38 tumor-bearing mice confirmed the effective targeting properties of the nano-carrier as monitored by F-19-MRI.