Article
Pharmacology & Pharmacy
Melissa S. O'Brien, Jason J. McDougall
Summary: The study compared the role of PAR4 in early and late stage osteoarthritis pain, and found that PAR4 may be a viable target for treating early onset OA pain or episodic inflammatory flares.
FRONTIERS IN PHARMACOLOGY
(2021)
Article
Pharmacology & Pharmacy
Carmen De Caro, Claudia Cristiano, Carmen Avagliano, Mariarosaria Cuozzo, Giovanna La Rana, Gabriella Aviello, Giovambattista De Sarro, Antonio Calignano, Emilio Russo, Roberto Russo
Summary: This study found that PER exhibited significant analgesic and anti-inflammatory effects in both acute and chronic pain models, with the involvement of the cannabinergic system in its mechanism of action.
FRONTIERS IN PHARMACOLOGY
(2021)
Article
Pharmacology & Pharmacy
Maanvee Mirakhur, Martin Diener
Summary: Proteinases released during inflammatory or allergic responses affect gastrointestinal functions via proteinase-activated receptors. This study focuses on the effect of PAR1 and PAR2 agonists on electrogenic ion transport, tissue conductance, and muscle contractility in different segments of the gastrointestinal tract. The results suggest that the functions of PAR1 and PAR2 vary depending on the intestinal segment.
EUROPEAN JOURNAL OF PHARMACOLOGY
(2022)
Article
Gastroenterology & Hepatology
Alba Santiago, Amber Hann, Marco Constante, Sara Rahmani, Josie Libertucci, Kyle Jackson, Gaston Rueda, Laura Rossi, Ramachandran Rithwick, Wolfram Ruf, Jon Schertzer, Alberto Caminero, Premysl Bercik, Heather Jean Galipeau, Elena Francisca Verdu
Summary: Emerging evidence suggests that microbial proteolytic activity is implicated in ulcerative colitis (UC), but its role in Crohn's disease (CD) remains unclear. This study investigated the effects of colonizing germ-free mice with CD microbiota and healthy control microbiota. It was found that CD proteolytic microbiota increased colitis severity through a PAR2 pathway. These findings highlight the proinflammatory nature of CD proteolytic microbiota and its role in exacerbating colitis.
Article
Neurosciences
Xuan Song, Jacqueline T. M. Aw, Fulin Ma, Ming Fung Cheung, Danny Leung, Karl Herrup
Summary: Research suggests that failure to repair DNA damage can lead to sterile inflammation in neurodegenerative diseases, sourced from transcriptionally inactive genomic regions and actively exported to the cytoplasm for degradation through a CRM1-dependent mechanism.
JOURNAL OF NEUROSCIENCE
(2021)
Review
Biochemistry & Molecular Biology
Flora Lucena, Jason J. McDougall
Summary: Serine proteases play a dual role in arthritic joints by not only causing destruction but also signaling pain and inflammation. Protease activated receptors (PARs) have the potential to regulate joint homeostasis and targeting them may offer therapeutic benefits for alleviating pain and destructive nature of elevated proteases in arthritis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Cell Biology
Arundhasa Chandrabalan, Rithwik Ramachandran
Summary: Proteinase-activated receptors (PARs) in prostate cancer cells regulate tumor growth and metastasis through autocrine signaling. In this study, PAR1 and PAR2 were found to be functional in PC3 cells, while PAR4 was not expressed. The secretion of proteolytic enzymes by PC3 cells triggers cleavage of PARs, leading to autocrine signaling and the regulation of genes related to prostate cancer. PAR1 deficiency promotes cell migration and suppresses cell proliferation, while PAR2 deficiency has the opposite effects.
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Hongbo Fang, Zibo Yuan, Yaohua Zhu, Hongwei Tang, Chun Pang, Jie Li, Jihua Shi, Wenzhi Guo, Shuijun Zhang
Summary: This study reveals the involvement of protease-activated receptor 4 (PAR4) in liver injury induced by brain death (BD). Blockade of PAR4 signaling mitigates liver damage, suppresses inflammation and apoptosis, and improves platelet activation and accumulation.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2022)
Article
Medicine, Research & Experimental
Sergio Lopez-Estevez, Georgia Gris, Beatriz de la Puente, Alicia Carceller, Vicente Martinez
Summary: Sigma-1 receptors play an important role in intestinal inflammation-associated referred hyperalgesia, with knockout mice showing significant attenuation in inflammation associated hypersensitivity. The absence of sigma(1)Rs had little impact on colitis generation and progression, but did show reduction in edema and down-regulation of iNOS gene expression during the chronic phase.
BIOMEDICINE & PHARMACOTHERAPY
(2021)
Article
Biochemistry & Molecular Biology
Sergio Lopez-Estevez, Monica Aguilera, Georgia Gris, Beatriz de la Puente, Alicia Carceller, Vicente Martinez
Summary: This study found that sigma 1Rs are involved in the development of acute colitis and its associated hypersensitivity. Selective modulation of sensory-related pathways within the colon and spinal cord may be part of the underlying mechanism.
Article
Gastroenterology & Hepatology
Flavia Maria Silva-Veiga, Carolline Santos Miranda, Isabela Macedo Lopes Vasques-Monteiro, Henrique Souza-Tavares, Fabiane Ferreira Martins, Julio Beltrame Daleprane, Vanessa Souza-Mello
Summary: This study aimed to investigate the effects of PPAR-alpha activation and DPP-4 inhibition on the gut-liver axis, with a focus on inflammatory pathways in the management of NAFLD in high-fat-fed mice. The results showed that these treatments can alleviate NAFLD by restoring gut microbiota and reducing inflammatory signals.
WORLD JOURNAL OF GASTROENTEROLOGY
(2022)
Article
Biochemistry & Molecular Biology
Spiro Khoury, Jenny Colas, Veronique Breuil, Eva Kosek, Aisha S. Ahmed, Camilla I. Svensson, Fabien Marchand, Emmanuel Deval, Thierry Ferreira
Summary: Through mass spectrometry analysis, researchers have identified specific lipid species, including lysophosphatidylcholine LPC16:0, as biomarkers for chronic joint pain, with significantly higher levels detected in patient samples. Additionally, certain lipid levels were found to be associated with the type of joint pathology, with LPC16:0 levels correlating with patient's metabolic status and other choline-containing lipids specifically associated with the inflammatory state.
Article
Pharmacology & Pharmacy
Ying-Ting Lin, Yu Li, Hui-Ching Hsu, Ju-Ying Tsai, Jia-Hau Lee, Chi-Jung Tai, Ming-Jung Wu, Chin-Chung Wu
Summary: There is increasing evidence of the importance of protease-activated receptor 4 (PAR4) as a therapeutic target in thrombotic cardiovascular diseases. In this study, a flavonoid called 7, 4'-dimethoxy-3-hydroxyflavone was discovered as a new PAR4 antagonist from natural origin. It showed antiplatelet activity by inhibiting PAR4-mediated platelet aggregation and downstream signaling pathways. In addition, it displayed effective antithrombotic properties with less bleeding tendency in vivo, making it a potential candidate for developing new antiplatelet agents.
BIOCHEMICAL PHARMACOLOGY
(2022)
Article
Endocrinology & Metabolism
Benjamin Brustolin, Nina Touly, Marine Maillefer, Lola Parisot, Elisa Di Pillo, Marc Derive, Sebastien Gibot
Summary: This study demonstrates that TREM-1 plays a significant role in obesity and its associated complications. In the mouse model of high-fat diet-induced obesity, suppressing TREM-1 reduces weight gain, insulin resistance, and inflammation in white adipose tissue and liver. Therefore, TREM-1 could be a potential therapeutic target for obesity.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Immunology
Wei Zhang, Eun-Koung An, Juyoung Hwang, Jun-O Jin
Summary: The study found that LPS can directly stimulate pDCs via the TLR4/MD2 pathway and promote the activation of pDCs and cDCs. cDCs may contribute to the enhancement of IFN-alpha production in pDCs.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Gastroenterology & Hepatology
Jean-Paul Motta, Simone Palese, Carmine Giorgio, Kevin Chapman, Alexandre Denadai-Souza, Perrine Rousset, David Sagnat, Laura Guiraud, Anissa Edir, Carine Seguy, Laurent Alric, Delphine Bonnet, Barbara Bournet, Louis Buscail, Cyrielle Gilletta, Andre G. Buret, John L. Wallace, Morley D. Hollenberg, Eric Oswald, Elisabetta Barocelli, Sylvie Le Grand, Bruno Le Grand, Celine Deraison, Nathalie Vergnolle
Summary: Elevated thrombin activity in the colon of Crohn's disease patients may lead to tissue damage and inflammation. Experimental evidence suggests that colonic thrombin and protease-activated receptor-1 could be potential mechanisms involved in mucosal damage and loss of function.
JOURNAL OF CROHNS & COLITIS
(2021)
Review
Cell Biology
Claire Racaud-Sultan, Nathalie Vergnolle
Summary: In adult stem cells, GSK3 beta plays a crucial role in regulating cell survival, proliferation, adherence, and differentiation, with its activity dependent on integrin and PAR engagement. Prolonged activation of GSK3 beta may lead to defects in epithelial regeneration and resistance to chemotherapy in leukemic cells, with a sexual dimorphism in GSK3 beta-dependent cellular functions. Adjusted therapy based on GSK3 beta activity is essential for inflammatory and cancer diseases in patients.
Article
Gastroenterology & Hepatology
Matthieu Rouland, Lucie Beaudoin, Ophelie Rouxel, Leo Bertrand, Lucie Cagninacci, Azadeh Saffarian, Thierry Pedron, Dalale Gueddouri, Sandra Guilmeau, Anne-Francoise Burnol, Latif Rachdi, Asmaa Tazi, Juliette Mouries, Maria Rescigno, Nathalie Vergnolle, Philippe Sansonetti, Ute Christine Rogner, Agnes Lehuen
Summary: Our study found in autoimmune T1D models a consistent decrease in IL-17A, IL-22, and IL-23A in gut mucosa, along with impaired intestinal epithelial cell function and compromised gut integrity. This was accompanied by dysbiosis, including progressive loss of SFB. Anti-inflammatory treatment restored gut mucosa and immune cell function, reducing diabetes incidence.
Article
Gastroenterology & Hepatology
Nuria Sola Tapias, Alexandre Denadai-Souza, Claire Rolland-Fourcade, Muriel Quaranta-Nicaise, Catherine Blanpied, Marlene Marcellin, Anissa Edir, Corinne Rolland, Carla Cirillo, Gilles Dietrich, Laurent Alric, Guillaume Portier, Sylvain Kirzin, Delphine Bonnet, Emmanuel Mas, Odile Burlet-Schiltz, Celine Deraison, Chrystelle Bonnart, Nathalie Vergnolle, Frederick Barreau
Summary: Inflammatory bowel disease patients exhibit excessive induction of endoplasmic reticulum stress in intestinal epithelial cells, which is associated with increased serine protease activity. The increased trypsin activity induced by ER stress destabilizes intestinal barrier function and promotes the development of inflammatory processes by controlling inflammatory mediators, dependent on the activation of protease-activated receptors 2 and 4.
JOURNAL OF CROHNS & COLITIS
(2021)
Article
Immunology
Jean-Paul Motta, Corinne Rolland, Anissa Edir, Ana-Carolina Florence, David Sagnat, Chrystelle Bonnart, Perrine Rousset, Laura Guiraud, Muriel Quaranta-Nicaise, Emmanuel Mas, Delphine Bonnet, Elena F. Verdu, Derek M. McKay, Etienne Buscail, Laurent Alric, Nathalie Vergnolle, Celine Deraison
Summary: Imbalance between proteases and their inhibitors is crucial in the development of Inflammatory Bowel Diseases (IBD). This study identifies a previously unrevealed production of elastase 2A (ELA2A) by colonic epithelial cells in IBD patients, leading to inflammation and loss of barrier function. Targeting ELA2A hyperactivity could be a potential treatment for IBD.
MUCOSAL IMMUNOLOGY
(2021)
Review
Gastroenterology & Hepatology
Jean-Paul Motta, John L. Wallace, Andre G. Buret, Celine Deraison, Nathalie Vergnolle
Summary: This article discusses the natural organization of microorganisms on gastrointestinal surfaces, microbiota taxonomy, biogeographical localization, and trans-kingdom interactions within the biofilm habitat. The importance of the host-biofilm relationship in gut homeostasis and disease is evaluated, along with the role of biofilms in gut homeostasis and pathological processes. Further research on biofilm properties and communication could provide insights into gut physiology and potential therapeutic options for gastrointestinal diseases.
NATURE REVIEWS GASTROENTEROLOGY & HEPATOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Flora Lucena, Jason J. McDougall
Summary: Serine proteases play a dual role in arthritic joints by not only causing destruction but also signaling pain and inflammation. Protease activated receptors (PARs) have the potential to regulate joint homeostasis and targeting them may offer therapeutic benefits for alleviating pain and destructive nature of elevated proteases in arthritis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Gastroenterology & Hepatology
Jean-Paul Motta, Celine Deraison, Sylvie Le Grand, Bruno Le Grand, Nathalie Vergnolle
Summary: A new paradigm has been proposed for the treatment of inflammatory bowel diseases, focusing on tissue repair and mucosal healing in addition to resolving symptoms and inflammation. The PAR-1 antagonist has shown potential benefits in promoting mucosal repair in Crohn's disease patients, suggesting a new indication for IBD treatment.
INFLAMMATORY BOWEL DISEASES
(2021)
Editorial Material
Gastroenterology & Hepatology
Nathalie Vergnolle
NATURE REVIEWS GASTROENTEROLOGY & HEPATOLOGY
(2022)
Article
Gastroenterology & Hepatology
Mathieu Berger, Laura Guiraud, Alexia Dumas, David Sagnat, Gaelle Payros, Corinne Rolland, Nathalie Vergnolle, Eline Deraison, Nicolas Cenac, Claire Racaud-Sultan
Summary: Prenatal stress negatively impacts the proliferation and differentiation of intestinal stem cells and progenitors. This effect is mediated by the activation of protease-activated receptor 2 (PAR2) and muscarinic receptor 3 (M3) in a sexually dimorphic manner. In males, prenatal stress reinforces the negative control on cell proliferation and differentiation, while in females, it induces a switch in regulation leading to a resistant and proliferative phenotype of progenitors.
AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY
(2022)
Review
Pharmacology & Pharmacy
Celine Deraison, Chrystelle Bonnart, Philippe Langella, Karine Roget, Nathalie Vergnolle
Summary: Elafin and its precursor trappin-2 play an important role in protecting the intestinal mucosal barrier from microbial invasion, especially in gut inflammation. They have shown protective effects in gut intestinal disorders associated with acute or chronic inflammation, as well as gluten sensitization disorders, through various mechanisms. The potential therapeutic application of delivering trappin-2/elafin to the intestinal mucosa surface and its role in intestinal tissue repair are also discussed.
BRITISH JOURNAL OF PHARMACOLOGY
(2023)
Article
Geriatrics & Gerontology
Y. Santin, S. Lopez, I Ader, S. Andrieu, N. Blanchard, A. Carriere, L. Casteilla, B. Cousin, N. Davezac, P. De Souto Barreto, C. Dray, N. Fazilleau, D. Gonzalez-Dunia, P. Gourdy, S. Guyonnet, N. Jabrane-Ferrat, O. Kunduzova, F. Lezoualc'h, R. Liblau, L. O. Martinez, C. Moro, P. Payoux, L. Penicaud, V Planat-Benard, C. Rampon, Y. Rolland, J-P Schanstra, F. Sierra, P. Valet, A. Varin, N. Vergnolle, B. Vellas, J. Vina, B. P. Guiard, A. Parini
Summary: Aging is a major risk factor for chronic diseases, and efforts are now focused on promoting healthy aging by identifying early biological markers associated with functional status. The INSPIRE program aims to discover mechanisms of accelerated aging and predict frailty and pathological aging using a cohort of SWISS mice. This comprehensive study will provide valuable insights into the role of dietary and exercise interventions in influencing the rate of biological aging and identifying targets for healthy aging promotion.
JOURNAL OF FRAILTY & AGING
(2021)
Article
Geriatrics & Gerontology
S. Guyonnet, Y. Rolland, C. Takeda, P-J Ousset, I Ader, N. Davezac, C. Dray, N. Fazilleau, P. Gourdy, R. Liblau, A. Parini, P. Payoux, L. Penicaud, C. Rampon, P. Valet, N. Vergnolle, S. Andrieu, P. De Souto Barreto, L. Casteilla, B. Vellas
Summary: The INSPIRE initiative aims to establish a research program focusing on the biological mechanisms of aging and healthy aging, from animal models to humans and the healthcare system. The INSPIRE-T cohort gathers diverse data from individuals of different ages and functional capacities, with the goal of identifying markers of aging and age-related diseases for potential therapeutic targeting.
JOURNAL OF FRAILTY & AGING
(2021)
Article
Geriatrics & Gerontology
P. De Souto Barreto, S. Guyonnet, I Ader, S. Andrieu, L. Casteilla, N. Davezac, C. Dray, N. Fazilleau, P. Gourdy, R. Liblau, A. Parini, P. Payoux, L. Penicaud, C. Rampon, Y. Rolland, P. Valets, N. Vergnolle, B. Vellas
Summary: Aging is a key risk factor for chronic diseases and functional decline, and understanding the interplay between biological aging, disease biology, and a function-centered care approach is crucial for preventive strategies. The INSPIRE research program aims to explore how manipulation of biological aging and implementation of function-centered care pathways can contribute to healthy aging trajectories.
JOURNAL OF FRAILTY & AGING
(2021)
Review
Clinical Neurology
Florent Guerville, P. De Souto Barreto, I. Ader, S. Andrieu, L. Casteilla, C. Dray, N. Fazilleau, S. Guyonnet, D. Langin, R. Liblau, A. Parini, P. Valet, N. Vergnolle, Y. Rolland, B. Vellas
JPAD-JOURNAL OF PREVENTION OF ALZHEIMERS DISEASE
(2020)