Kevin Perez

Kevin Perez
University of Lausanne | UNIL

PhD

About

18
Publications
1,307
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156
Citations

Publications

Publications (18)
Preprint
The induction of cellular reprogramming by forced expression of the transcription factors OCT4, SOX2, KLF4, and C-MYC (OSKM) has been shown to allow the dedifferentiation of somatic cells and ameliorate age-associated phenotypes in multiple tissues and organs. Yet to date, the benefits of in vivo reprogramming are limited by the occurrence of detri...
Article
Background and aims: Ileocolonic resection is frequently needed in the course of Crohn's disease (CD) and post-operative recurrence is extremely common. Our main objective was to analyze gene expression in the mucosa of CD patients at time of surgery and post-operative endoscopy, in order to identify predictors and mechanisms of early endoscopic r...
Article
Full-text available
Cellular senescence is a driver of many age-related pathologies. There is an active search for pharmaceuticals termed senolytics that can mitigate or remove senescent cells in vivo by targeting genes that promote the survival of senescent cells. We utilized single-cell RNA sequencing to identify CRYAB as a robust senescence-induced gene and potenti...
Article
Background T resident memory (Trm) cells in the intestinal mucosa and in particular subpopulations expressing phenotypic markers such as alphaE-beta7 or NKG2D have been associated with chronic inflammatory bowel disease (IBD) activity. We hypothesize that these populations may have a direct deleterious impact on the intestinal epithelium in IBD. M...
Article
Background Inflammatory bowel diseases (IBDs) are characterized by chronic inflammation and tissue damages in limited segments of the digestive tract. Pathogenesis in the tissue and mucosal inflammation probably differs according to disease location. Our aim was to further analyze transcriptomic profiles in different locations of IBD, differentiati...
Preprint
Full-text available
Skeletal muscle mass and function can decline with aging, resulting in a syndrome known as sarcopenia. This decline is linked to functional alterations in critical cell types within mature muscle, including fibro-adipogenic progenitors (FAPs) and satellite cells (SCs), driven in part by cellular senescence. We utilized single-cell RNA sequencing an...
Article
Full-text available
Chronic inflammation is thought to be a major cause of morbidity and mortality in aging, but whether similar mechanisms underlie dysfunction in infection-associated chronic inflammation is unclear. Here, we profiled the immune proteome, and cellular composition and signaling states in a cohort of aging individuals versus a set of HIV patients on lo...
Preprint
Full-text available
Aging is accompanied by a loss of muscle mass and function, termed sarcopenia, which causes numerous morbidities and economic burdens in human populations. Mechanisms implicated in age-related sarcopenia include inflammation, muscle stem cell depletion, mitochondrial dysfunction and loss of motor neurons, but whether there are key drivers of sarcop...
Article
Full-text available
Background: The coronavirus disease 2019 (COVID-19) pandemic continues to ravage and burden hospitals around the world. The epidemic started in Wuhan, China was recognized by the World Health Organization (WHO) as an international public health emergency and declared the outbreak a pandemic in March 2020. Since then, the scale of disruptions cause...
Preprint
BACKGROUND The COVID-19 pandemic continues to ravage and burden hospitals around the world. The epidemic started in Wuhan, China, and was subsequently recognized by the World Health Organization as an international public health emergency and declared a pandemic in March 2020. Since then, the disruptions caused by the COVID-19 pandemic have had an...
Preprint
Full-text available
The coronavirus disease 2019 (COVID-19) pandemic, caused by Severe Acute Respiratory Syndrome (SARS)-CoV-2, continues to burden medical institutions around the world by increasing total hospitalization and Intensive Care Unit (ICU) admissions. A better understanding of symptoms, comorbidities and medication used for pre-existing conditions in patie...
Article
Background A dysregulated T-cell response is involved in the pathophysiology of inflammatory bowel diseases (IBD). T cells expressing the NKG2D activation receptor are implicated. Here, we investigated changes in intestinal T lymphocyte subsets overtime in patients treated by biotherapy for active disease. Methods In this prospective single-centre...
Article
T cell clonal expansions are present in the inflamed mucosa of patients with Crohn’s disease (CD) and may be implicated in postoperative recurrence after ileocolonic resection. Methods T cell receptor (TCR) analysis was performed in 57 patients included in a prospective multicentre cohort. Endoscopic recurrence was defined by a Rutgeerts score >i0...
Article
Full-text available
Background and aims N-acyl homoserine lactones (AHLs), which are autoinducer quorum-sensing molecules involved in the bacterial communication network, also interact with eukaryotic cells. Searching for these molecules in the context of inflammatory bowel disease (IBD) is appealing. The aims of our study were to look for AHL molecules in faecal samp...
Article
Full-text available
Background: Patients with primary sclerosing cholangitis associated with inflammatory bowel disease (PSC-IBD) have a very high risk of developing colorectal neoplasia. Alterations in the gut microbiota and/or gut bile acids could account for the increase in this risk. However, no studies have yet investigated the net result of cholestasis and a po...
Article
Background: The comparative efficacy of adalimumab (ADA) and infliximab (IFX) in Crohn's disease, and the benefit of initial combotherapy with an immunomodulator, are debated. Aim: To assess the best anti-TNF treatment regimens in Crohn's disease. Methods: We included 906 biologic-naïve Crohn's disease patients [median age, 31 years (24-41)] a...

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