Publications by authors named "Jean C Chamcheu"

Members of the genus including Jurona virus (JURV) have emerged as promising immunotherapeutic agents, characterized by their tumor selectivity, fast kinetics, low seroprevalence, and minimal toxicity in humans. Here, we demonstrate that the administration of JURV leads to tumor regression in both hepatocellular carcinoma (HCC) xenograft and syngeneic models. Furthermore, our findings indicate that combining JURV and anti-PD-1 therapy reduced tumor burden and improved survival rates over JURV or anti-PD-1 alone in an orthotopic HCC model.

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Since the early 20th century, the increase in non-communicable diseases such as diabetes, heart disease, stroke, and cancer compared to infectious diseases has led to chronic illnesses becoming a leading cause of global morbidity and mortality [...

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  • - Transduction of molecular signaling is how cells communicate both with each other and their surroundings through chemical or physical signals.
  • - This process is crucial for maintaining the cell's structure and integrity.
  • - It also triggers various physiological responses necessary for the cell's function and survival.
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  • About 25% of people with a type of pancreatic cancer called PDAC can't have surgery or have advanced stages, and treatments like chemotherapy and radiation haven't worked well for them.
  • Removing these tumors is hard because of their size and how they connect to nearby blood vessels.
  • A new treatment using special viruses could help by breaking down tough parts of the tumor, allowing better access for other treatments and possibly making the tumors smaller.
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  • Cannabis and its major cannabinoid, cannabidiol (CBD), show potential anticancer effects against skin tumors, particularly melanoma.
  • In experiments, CBD exhibited significant cytotoxicity, with IC values of 28.6 and 51.6 μM against murine (B16F10) and human (A375) melanoma cells, respectively.
  • Synthetic CBD derivatives with bipiperidinyl groups demonstrated even greater cytotoxicity, suggesting that these compounds could be effective in treating melanoma by inducing apoptosis in cancer cells.
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  • Melanoma and nonmelanoma skin cancers are leading forms of skin cancer, prompting research for new anticancer compounds through in vitro assays and in-silico methods.
  • Screening of a small library of previously prepared compounds revealed 35 that inhibited the growth of skin cancer cell lines, particularly showing strong effects on A431 and SCC-12 cells.
  • The most effective compounds (11 and 13) induced apoptosis and disrupted cancer-promoting pathways, suggesting potential targets for further study and development in treating skin cancers.
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Natural α-glucosidase inhibitors from plant-based foods such as catechins offer an attractive strategy for their potential anti-diabetic effects. In this study, infusions of three different tea types (green, white, and oolong) were investigated for their total phenolic (TPC) and catechins (EGCG, ECG, EGC, and EC) content, and for their α-glucosidase inhibitory activities. We observed that the level of TPC in white tea was significantly higher compared to oolong and green tea, which suggests higher content of EGCG and ECG catechins in fresh young leaves.

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  • The PI3K-Akt-mTOR signaling pathway is linked to various inflammatory skin conditions, which can lead to ineffective treatments for diseases like acne and psoriasis.
  • Understanding how this pathway operates has spurred the creation of new therapeutic strategies, but more research is needed to fully grasp its regulatory functions.
  • Some natural and synthetic compounds show promise in inhibiting this pathway, highlighting their potential for treating persistent skin inflammatory disorders.
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  • Vahl. species from the Burseraceae family are widely utilized in traditional medicine for treating various ailments like malaria, wounds, and infections.
  • A systematic review highlighted their ethnobotanical uses, phytochemical profiles, and pharmacological benefits, revealing potential in areas such as anti-cancer and anti-inflammatory treatments.
  • Despite promising findings, many therapeutic aspects of these plants remain under-researched, indicating a need for more rigorous scientific investigation to fully understand and exploit their medicinal properties.
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Twenty-five azole compounds (-) were synthesised using regioselective base-metal catalysed and microwave-assisted approaches, fully characterised by high-resolution mass spectrometry (HRMS), nuclear magnetic resonance (NMR), and infrared spectra (IR) analyses, and evaluated for anticancer, anti-tyrosinase, and anti-oxidant activities and . exhibited potent anticancer activity against cells of four skin cancer (SC) lines, with selectivity for melanoma (A375, SK-Mel-28) or non-melanoma (A431, SCC-12) SC cells over non-cancerous HaCaT-keratinocytes. Clonogenic, scratch-wound, and immunoblotting assay data were consistent with anti-proliferative results, expression profiling therewith implicating intrinsic and extrinsic apoptosis activation.

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Psoriasis is a chronic autoimmune inflammatory skin disorder characterized by epidermal hyperplasia and aberrant immune response. In addition to aberrant cytokine production, psoriasis is associated with activation of the Akt/mTOR pathway. mTOR/S6K1 regulates T-lymphocyte activation and migration, keratinocytes proliferation and is upregulated in psoriatic lesions.

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Phytomedicines reportedly rich in cystine knot peptides (Knottins) are found in several global diets, food/herbal supplements and functional foods. However, their knottin peptide content has largely been unexplored, notably for their emerging dual potentials at both the food and medicine space. The nutritional roles, biological targets and mechanism(s) of activity of these knotted peptides are largely unknown.

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It has long been known that oncolytic viruses wield their therapeutic capability by priming an inflammatory state within the tumor and activating the tumor immune microenvironment, resulting in a multifaceted antitumor immune response. Vaccine-derived viruses, such as measles and mumps, have demonstrated promising potential for treating human cancer in animal models and clinical trials. However, the extensive cost of manufacturing current oncolytic viral products makes them far out of reach for most patients.

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Phenolics enriched pomegranate fruit (Pomella) and red maple leaf (Maplifa) extracts and their major phenolic constituents have demonstrated beneficial skin effects through the protection of human skin keratinocytes from oxidative-stress-induced damage. However, their mechanisms of protection of cutaneous collagen are still unclear. Herein, the collagen protective effects of Pomella and Maplifa, and their major bioactive phytochemicals, namely, punicalagin (PA) and ginnalin A (GA), respectively, were evaluated using enzymatic assays including collagenase, anti-glycation and cell-based models as well as computational methods.

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Background: Morreton virus (MORV) is an oncolytic Vesiculovirus , genetically distinct from vesicular stomatitis virus (VSV).

Aim: To report that MORV induced potent cytopathic effects (CPEs) in cholangiocarcinoma (CCA) and hepatocellular carcinoma (HCC) in vitro models.

Approach And Results: In preliminary safety analyses, high intranasal doses (up to 10 10 50% tissue culture infectious dose [TCID 50 ]) of MORV were not associated with significant adverse effects in immune competent, non-tumor-bearing mice.

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The skin is the largest organ of the integumentary system, strategically located at the interface of the body's internal and external environment. [..

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This article contains supplemental datasets of the recently published related research article by Roy et al., [1]. It provides in-depth data not included in the original co-submission on the biophysical, molecular docking, and biological characterization of newly synthesized flavonol-based analogs of fisetin, a natural dietary small molecule with anticancer and anti-inflammatory properties.

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There is a high prevalence of blood-borne infections in West Africa. This study sought to determine the seroprevalence of blood-borne infections, including hepatitis B virus (HBV), hepatitis C virus (HCV), HIV, and syphilis, in blood donors in Burkina Faso. Blood donors were recruited from 2009 to 2013 in four major cities in Burkina Faso of urban area (Ouagadougou) and rural area (Bobo Dioulasso, Fada N'Gourma, and Ouahigouya).

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Due to hurdles, including resistance, adverse effects, and poor bioavailability, among others linked with existing therapies, there is an urgent unmet need to devise new, safe, and more effective treatment modalities for skin cancers. Herein, a series of flavonol-based derivatives of fisetin, a plant-based flavonoid identified as an anti-tumorigenic agent targeting the mammalian targets of rapamycin (mTOR)-regulated pathways, were synthesized and fully characterized. New potential inhibitors of receptor tyrosine kinases (c-KITs), cyclin-dependent kinase-2 (CDK2), and mTOR, representing attractive therapeutic targets for melanoma and non-melanoma skin cancers (NMSCs) treatment, were identified using inverse-docking, in vitro kinase activity and various cell-based anticancer screening assays.

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Chronic metabolic acidosis (CMA) can be a consequence of persistent hypertension but could potentially play a role in invoking hypertension. Currently, there is a scarcity of studies examining the outcome of induced chronic acidosis on blood pressure regulation. This study investigates CMA as a cause of hypertension.

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Article Synopsis
  • Hepatitis B virus genotype E is prevalent in West Africa, being the most common strain found in chronic hepatitis B patients.
  • Factors linked to the development of hepatocellular carcinoma (HCC) include older age, male sex, and higher levels of HBV in the blood.
  • Patients with HBV-E had lower hepatitis B e antigen (HBeAg) prevalence and viral load, but a higher rate of cirrhosis compared to those with another genotype (C/E), highlighting the need for tailored management strategies in the region.
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Glucosylceramide synthase (GCS) is a key enzyme catalyzing ceramide glycosylation to generate glucosylceramide (GlcCer), which in turn serves as the precursor for cells to produce glycosphingolipids (GSLs). In cell membranes, GSLs serve as essential components of GSL-enriched microdomains (GEMs) and mediate membrane functions and cell behaviors. Previous studies showed that ceramide glycosylation correlates with upregulated expression of p53 hotspot mutant R273H and cancer drug resistance.

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Black cumin () seed extract has been shown to improve dermatological conditions, yet its beneficial effects for skin are not fully elucidated. Herein, Thymocid, a chemically standardized black cumin seed extract, was investigated for its cosmeceutical potential including anti-aging properties associated with modulation of glycation, collagen cross-linking, and collagenase and elastase activities, as well as antimelanogenic effect in murine melanoma B16F10 cells. Thymocid (50, 100, and 300 µg/mL) inhibited the formation of advanced glycation end-products (by 16.

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Psoriasis is a chronic immune-mediated skin disease that involves the interaction of immune and skin cells, and is characterized by cytokine-driven epidermal hyperplasia, deviant differentiation, inflammation, and angiogenesis. Because the available treatments for psoriasis have significant limitations, dietary products are potential natural sources of therapeutic molecules, which can repair the molecular defects associated with psoriasis and could possibly be developed for its management. Fisetin (3,7,3',4'-tetrahydroxyflavone), a phytochemical naturally found in pigmented fruits and vegetables, has demonstrated proapoptotic and antioxidant effects in several malignancies.

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