scholarly journals Mouse Models in Prostate Cancer Translational Research: From Xenograft to PDX

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Domenica Rea ◽  
Vitale del Vecchio ◽  
Giuseppe Palma ◽  
Antonio Barbieri ◽  
Michela Falco ◽  
...  
Keyword(s):  
Mouse Models ◽  
Disease Incidence ◽  
Receptor Expression ◽  
Differential Sensitivity ◽  
Phase Iii ◽  
Preclinical Models ◽  
Preclinical Research ◽  
Advantages And Disadvantages

Despite the advancement of clinical and preclinical research on PCa, which resulted in the last five years in a decrement of disease incidence by 3-4%, it remains the most frequent cancer in men and the second for mortality rate. Based on this evidence we present a brief dissertation on numerous preclinical models, comparing their advantages and disadvantages; among this we report the PDX mouse models that show greater fidelity to the disease, in terms of histopathologic features of implanted tumor, gene and miRNA expression, and metastatic pattern, well describing all tumor progression stages; this characteristic encourages the translation of preclinical results. These models become particularly useful in meeting the need of new treatments identification that eradicate PCa bone metastases growing, clarifying pathway of angiogenesis, identifying castration-resistant stem-like cells, and studying the antiandrogen therapies. Also of considerable interest are the studies of 3D cell cultures derived from PDX, which have the ability to maintain PDX cell viability with continued native androgen receptor expression, also showing a differential sensitivity to drugs. 3D PDX PCa may represent a diagnostic platform for the rapid assessment of drugs and push personalized medicine. Today the development of preclinical models in vitro and in vivo is necessary in order to obtain increasingly reliable answers before reaching phase III of the drug discovery.

Preclinical Research in McArdle Disease: A Review of Research Models and Therapeutic Strategies

Genes ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 74
Author(s):  
Mónica Villarreal-Salazar ◽  
Astrid Brull ◽  
Gisela Nogales-Gadea ◽  
Antoni L. Andreu ◽  
Miguel A. Martín ◽  
...  
Keyword(s):  
Clinical Symptoms ◽  
Autosomal Recessive Disorder ◽  
Glycogen Metabolism ◽  
Preclinical Models ◽  
Preclinical Research ◽  
Mcardle Disease ◽  
Invasive Techniques ◽  
Insight Into

McArdle disease is an autosomal recessive disorder of muscle glycogen metabolism caused by pathogenic mutations in the PYGM gene, which encodes the skeletal muscle-specific isoform of glycogen phosphorylase. Clinical symptoms are mainly characterized by transient acute “crises” of early fatigue, myalgia and contractures, which can be accompanied by rhabdomyolysis. Owing to the difficulty of performing mechanistic studies in patients that often rely on invasive techniques, preclinical models have been used for decades, thereby contributing to gain insight into the pathophysiology and pathobiology of human diseases. In the present work, we describe the existing in vitro and in vivo preclinical models for McArdle disease and review the insights these models have provided. In addition, despite presenting some differences with the typical patient’s phenotype, these models allow for a deep study of the different features of the disease while representing a necessary preclinical step to assess the efficacy and safety of possible treatments before they are tested in patients.

scholarly journals Orthotopic Patient-Derived Xenografts of Gastric Cancer to Decipher Drugs Effects on Cancer Stem Cells and Metastatic Dissemination

Cancers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 560 ◽  
Author(s):  
Julie Giraud ◽  
Damien Bouriez ◽  
Lornella Seeneevassen ◽  
Benoit Rousseau ◽  
Elodie Sifré ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Stem Cells ◽  
Cancer Stem Cells ◽  
Mouse Models ◽  
Distant Metastases ◽  
Preclinical Models ◽  
Immunocompromised Mice ◽  
Orthotopic Xenografts

Gastric cancer is the third leading cause of cancer mortality worldwide. Cancer stem cells (CSC) are at the origin of tumor initiation, chemoresistance, and the formation of metastases. However, there is a lack of mouse models enabling the study of the metastatic process in gastric adenocarcinoma (GC). The aims of this study were to develop original mouse models of patient-derived primary GC orthotopic xenografts (PDOX) allowing the development of distant metastases as preclinical models to study the anti-metastatic efficiency of drugs such as the phosphatidylinositol 3-kinase (PI3K) inhibitor Buparlisib (BKM120). Luciferase-encoding cells generated from primary GC were injected into the stomach wall of immunocompromised mice; gastric tumor and metastases development were followed by bioluminescence imaging. The anti-CSC properties of BKM120 were evaluated on the GC cells’ phenotype (CD44 expression) and tumorigenic properties in vitro and in vivo on BKM120-treated mice. After eight weeks, PDOX mice formed tumors in the stomach as well as distant metastases, that were enriched in CSC, in the liver, the lung, and the peritoneal cavity. BKM120 treatment significantly inhibited the CSC properties in vitro and reduced the number of distant metastases in mice. These new preclinical models offer the opportunity to study the anti-metastatic efficiency of new CSC-based therapeutic strategies.

scholarly journals A Novel and Potent Inhibitor of E-Selectin, GMI-1687, Attenuates Thrombus Formation and Augments Chemotherapeutic Intervention of AML in Preclinical Models Following Subcutaneous Administration

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 4678-4678
Author(s):  
John Peterson ◽  
Myung-Gi Baek ◽  
Silvia Locatelli-Hoops ◽  
Ji-Won Lee ◽  
Lingquan Deng ◽  
...  
Keyword(s):  
Thrombus Formation ◽  
Tumor Model ◽  
Phase Iii ◽  
Therapeutic Activity ◽  
Preclinical Models ◽  
Employment Equity ◽  
Equity Ownership ◽  
High Bioavailability

Abstract Uproleselan (GMI-1271), an E-selectin antagonist, has been shown in preclinical models to disrupt activation of cell survival pathways in acute myeloid leukemia (AML), enhance chemotherapy efficacy, and improve survival. Uproleselan received FDA breakthrough therapy designation for adult relapsed/refractory AML in 2017 and Phase III studies are ongoing. In the present studies we report on the in vitro and in vivo comparative activities of an innovative high potency E-selectin antagonist, GMI-1687, a potential subcutaneously administered follow-on drug candidate to Uproleselan. The binding constant, association and dissociation rates of GMI-1687 to immobilized recombinant human (rh) E-selectin were determined by surface plasmon resonance (SPR) at 25oC. The KD of GMI-1687 was 2.4 nM, with Kon = 3 x 106 M-1s-1 and Koff = 1 x10-2 s-1. Under similar experimental conditions the KD of Uproleselan was 520 nM with Kon = 0.02 x 106 M-1s-1 and Koff = 1 x10-2 s-1. GMI-1687 was evaluated for its ability to inhibit binding of sialyl Lea to immobilized rh E-selectin. The median IC50 (n=6 independent assays) of GMI-1687 and Uproleselan in this assay was 15 and 550 nM, respectively. The in vitro activity of GMI-1687 to release adherent KG1a AML cells from E-selectin coated wells was also determined. GMI-1687 at 100 nM detached approximately 55% of adherent AML cells and was significantly different from Uproleselan at an identical concentration (38% detachment, P=0.0216). The percent bioavailability (%F) of GMI-1687 was evaluated in male Sprague-Dawley rats following intravenous (IV) and subcutaneous (SC) routes of administration at 5 mg/kg. The mean (+/- SD) SC %F for GMI-1687 was 126 +/- 3.8%. GMI-1687 also showed high bioavailability in CD-1 mice after SC administration of 0.58 mg/kg with %F = 132 +/-38. The in vivo therapeutic activity of GMI-1687 following SC administration was assessed in an acute model of inferior vena cava (IVC) thrombosis and a tumor model of AML.Immediately following the induction of a non-occlusive thrombosis via electrical stimulation (250 mAmp) of the IVC, cohorts of male C57BL/6J mice (n=5/group) were given a single SC injection of saline (0.1 mL); Uproleselan (40 mg/kg); or GMI-1687 (4 mg/kg, 0.4 mg/kg or 0.04 mg/kg), and twenty-four hrs post thrombus induction the IVC was harvested from all mice and thrombus weights were determined. Treatment with GMI-1687 decreased thrombus formation with significant inhibition at 0.04 mg/kg (92%, P<0.001 compared to saline control). The inhibition of thrombus formation with GMI-1687 dosed at 0.04 mg/kg was statistically indistinguishable from Uproleselan administered SC at 40 mg/kg (97% inhibition). The therapeutic activity of SC GMI-1687 was also observed in combination with chemotherapy in a U937 tumor model. Three days post IV injection of U937 tumor cells, bone marrow ablated, female NOD/SCID mice (n=10/group) were treated with saline (0.1 mL SC QDx14); GMI-1687 (0.04 mg/kg SC QDx14) alone; cytarabine (AraC 300 mg/kg IP QDx3) + daunorubicin (DNR 3 mg/kg IV QDx1), or the combination of GMI-1687 and AraC + DNR. All treatments were well tolerated. The median survival time (MST) of mice treated with AraC + DNR was 36 days and statistically different (P<0.001) to groups treated with saline (MST=22 days) or GMI-1687 alone (MST=23 days). Importantly, the therapeutic activity of AraC+DNR was significantly enhanced when combined with GMI-1687 (MST>47.5 days, P=0.0153 compared to AraC+DNR alone). In summary, a highly potent innovative antagonist of E-selectin, GMI-1687, has been produced that demonstrates high bioavailability following SC administration. SC injection of GMI-1687 shows significant activity in preclinical models previously reported for parenteral administration of Uproleselan, but at approximately 250-fold lower dose. GMI-1687 is therefore well-positioned for potential use in outpatient treatment settings where an E-selectin antagonist has therapeutic relevance. IND-enabling studies with GMI-1687 are currently underway. Disclosures Peterson: GlycoMimetics: Employment, Equity Ownership. Baek:GlycoMimetics: Employment, Equity Ownership. Locatelli-Hoops:GlycoMimetics: Employment, Equity Ownership. Lee:GlycoMimetics: Employment, Equity Ownership. Deng:GlycoMimetics: Employment, Equity Ownership. Stewart:GlycoMimetics: Employment, Equity Ownership. Smith:GlycoMimetics: Employment, Equity Ownership. Fogler:GlycoMimetics: Employment, Equity Ownership. Magnani:GlycoMimetics: Employment, Equity Ownership, Membership on an entity's Board of Directors or advisory committees.

PERFUSION OF OVARIES IN VITRO AND IN VIVO

1972 ◽  
Vol 68 (2_Supplb) ◽  
pp. S285-S309 ◽  
Author(s):  
Kurt Ahrén ◽  
Per Olof Janson ◽  
Gunnar Selstam
Keyword(s):  
Perfusion System ◽  
Perfusion Technique ◽  
Preliminary Results ◽  
Advantages And Disadvantages

ABSTRACT This paper discusses in vivo and in vitro ovarian perfusion systems described so far in the literature. The interest is not focussed primarily on the results of these studies but rather on the advantages and disadvantages of the techniques and methods used. Another part of the paper summarizes the points which are most important, in our opinion, to take into consideration when developing an in vitro perfusion technique of the ovary. The last part of the paper gives a description of and some preliminary results from an in vitro perfusion system of the rabbit ovary which is under development in this laboratory.

scholarly journals Functional and Transcriptional Adaptations of Blood Monocytes Recruited to the Cystic Fibrosis Airway Microenvironment In Vitro

2021 ◽  
Vol 22 (5) ◽  
pp. 2530
Author(s):  
Bijean D. Ford ◽  
Diego Moncada Giraldo ◽  
Camilla Margaroli ◽  
Vincent D. Giacalone ◽  
Milton R. Brown ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Bactericidal Activity ◽  
Scavenger Receptor ◽  
Receptor Expression ◽  
Blood Monocytes ◽  
Bacterial Killing ◽  
Blood Neutrophils ◽  
Vitro Model

Cystic fibrosis (CF) lung disease is dominated by the recruitment of myeloid cells (neutrophils and monocytes) from the blood which fail to clear the lung of colonizing microbes. In prior in vitro studies, we showed that blood neutrophils migrated through the well-differentiated lung epithelium into the CF airway fluid supernatant (ASN) mimic the dysfunction of CF airway neutrophils in vivo, including decreased bactericidal activity despite an increased metabolism. Here, we hypothesized that, in a similar manner to neutrophils, blood monocytes undergo significant adaptations upon recruitment to CFASN. To test this hypothesis, primary human blood monocytes were transmigrated in our in vitro model into the ASN from healthy control (HC) or CF subjects to mimic in vivo recruitment to normal or CF airways, respectively. Surface phenotype, metabolic and bacterial killing activities, and transcriptomic profile by RNA sequencing were quantified post-transmigration. Unlike neutrophils, monocytes were not metabolically activated, nor did they show broad differences in activation and scavenger receptor expression upon recruitment to the CFASN compared to HCASN. However, monocytes recruited to CFASN showed decreased bactericidal activity. RNASeq analysis showed strong effects of transmigration on monocyte RNA profile, with differences between CFASN and HCASN conditions, notably in immune signaling, including lower expression in the former of the antimicrobial factor ISG15, defensin-like chemokine CXCL11, and nitric oxide-producing enzyme NOS3. While monocytes undergo qualitatively different adaptations from those seen in neutrophils upon recruitment to the CF airway microenvironment, their bactericidal activity is also dysregulated, which could explain why they also fail to protect CF airways from infection.

627 The DLL3-targeted half-life extended bispecific T cell engager (HLE BiTE®) immune-oncology therapy AMG 757 has potent antitumor activity in neuroendocrine cancer

2020 ◽  
Vol 8 (Suppl 3) ◽  
pp. A663-A663
Author(s):  
Keegan Cooke ◽  
Juan Estrada ◽  
Jinghui Zhan ◽  
Jonathan Werner ◽  
Fei Lee ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Tumor Growth ◽  
Mouse Models ◽  
T Cell Activation ◽  
Phase 1 ◽  
Phase 1 Study ◽  
Human T Cells

BackgroundNeuroendocrine tumors (NET), including small cell lung cancer (SCLC), have poor prognosis and limited therapeutic options. AMG 757 is an HLE BiTE® immune therapy designed to redirect T cell cytotoxicity to NET cells by binding to Delta-like ligand 3 (DLL3) expressed on the tumor cell surface and CD3 on T cells.MethodsWe evaluated activity of AMG 757 in NET cells in vitro and in mouse models of neuroendocrine cancer in vivo. In vitro, co-cultures of NET cells and human T cells were treated with AMG 757 in a concentration range and T cell activation, cytokine production, and tumor cell killing were assessed. In vivo, AMG 757 antitumor efficacy was evaluated in xenograft NET and in orthotopic models designed to mimic primary and metastatic SCLC lesions. NSG mice bearing established NET were administered human T cells and then treated once weekly with AMG 757 or control HLE BiTE molecule; tumor growth inhibition was assessed. Pharmacodynamic effects of AMG 757 in tumors were also evaluated in SCLC models following a single administration of human T cells and AMG 757 or control HLE BiTE molecule.ResultsAMG 757 induced T cell activation, cytokine production, and potent T cell redirected killing of DLL3-expressing SCLC, neuroendocrine prostate cancer, and other DLL3-expressing NET cell lines in vitro. AMG 757-mediated redirected lysis was specific for DLL3-expressing cells. In patient-derived xenograft and orthotopic models of SCLC, single-dose AMG 757 effectively engaged human T cells administered systemically, leading to a significant increase in the number of human CD4+ and CD8+ T cells in primary and metastatic tumor lesions. Weekly administration of AMG 757 induced significant tumor growth inhibition of SCLC (figure 1) and other NET, including complete regression of established tumors and clearance of metastatic lesions. These findings warranted evaluation of AMG 757 (NCT03319940); the phase 1 study includes dose exploration (monotherapy and in combination with pembrolizumab) and dose expansion (monotherapy) in patients with SCLC (figure 2). A study of AMG 757 in patients with neuroendocrine prostate cancer is under development based on emerging data from the ongoing phase 1 study.Abstract 627 Figure 1AMG 757 Significantly reduced tumor growth in orthotopic SCLC mouse modelsAbstract 627 Figure 2AMG 757 Phase 1 study designConclusionsAMG 757 engages and activates T cells to kill DLL3-expressing SCLC and other NET cells in vitro and induces significant antitumor activity against established xenograft tumors in mouse models. These preclinical data support evaluation of AMG 757 in clinical studies of patients with NET.Ethics ApprovalAll in vivo work was conducted under IACUC-approved protocol #2009-00046.

scholarly journals Development of a Fluorescent Tool for Studying Legionella bozemanae Intracellular Infection

2021 ◽  
Vol 9 (2) ◽  
pp. 379
Author(s):  
Breanne M. Head ◽  
Christopher I. Graham ◽  
Teassa MacMartin ◽  
Yoav Keynan ◽  
Ann Karen C. Brassinga
Keyword(s):  
Growth Kinetics ◽  
Legionella Pneumophila ◽  
Fluorescent Protein ◽  
Disease Incidence ◽  
Acanthamoeba Castellanii ◽  
Infection Model ◽  
Intracellular Infection ◽  
Green Fluorescent

Legionnaires’ disease incidence is on the rise, with the majority of cases attributed to the intracellular pathogen, Legionella pneumophila. Nominally a parasite of protozoa, L. pneumophila can also infect alveolar macrophages when bacteria-laden aerosols enter the lungs of immunocompromised individuals. L. pneumophila pathogenesis has been well characterized; however, little is known about the >25 different Legionella spp. that can cause disease in humans. Here, we report for the first time a study demonstrating the intracellular infection of an L. bozemanae clinical isolate using approaches previously established for L. pneumophila investigations. Specifically, we report on the modification and use of a green fluorescent protein (GFP)-expressing plasmid as a tool to monitor the L. bozemanae presence in the Acanthamoeba castellanii protozoan infection model. As comparative controls, L. pneumophila strains were also transformed with the GFP-expressing plasmid. In vitro and in vivo growth kinetics of the Legionella parental and GFP-expressing strains were conducted followed by confocal microscopy. Results suggest that the metabolic burden imposed by GFP expression did not impact cell viability, as growth kinetics were similar between the GFP-expressing Legionella spp. and their parental strains. This study demonstrates that the use of a GFP-expressing plasmid can serve as a viable approach for investigating Legionella non-pneumophila spp. in real time.

scholarly journals A Review on the Medicinal and Pharmacological Properties of Traditional Ethnomedicinal Plant Sonapatha, Oroxylum indicum

Sinusitis ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 71-89
Author(s):  
Ganesh Chandra Jagetia
Keyword(s):  
Glucose Transporter ◽  
Skin Diseases ◽  
Regulatory Element ◽  
Experimental Studies ◽  
Fatty Acid Synthetase ◽  
Preclinical Models ◽  
Oroxylin A ◽  
Oroxylum Indicum

Oroxylum indicum, Sonapatha is traditionally used to treat asthma, biliousness, bronchitis, diarrhea, dysentery, fevers, vomiting, inflammation, leukoderma, skin diseases, rheumatoid arthritis, wound injury, and deworm intestine. This review has been written by collecting the relevant information from published material on various ethnomedicinal and pharmacological aspects of Sonapatha by making an internet, PubMed, SciFinder, Science direct, and Google Scholar search. Various experimental studies have shown that Sonapatha scavenges different free radicals and possesses alkaloids, flavonoids, cardio glycosides, tannins, sterols, phenols, saponins, and other phytochemicals. Numerous active principles including oroxylin A, chrysin, scutellarin, baicalein, and many more have been isolated from the different parts of Sonapatha. Sonapatha acts against microbial infection, cancer, hepatic, gastrointestinal, cardiac, and diabetic disorders. It is useful in the treatment of obesity and wound healing in in vitro and in vivo preclinical models. Sonapatha elevates glutathione, glutathione-s-transferase, glutathione peroxidase, catalase, and superoxide dismutase levels and reduces aspartate transaminase alanine aminotransaminase, alkaline phosphatase, lactate dehydrogenase, and lipid peroxidation levels in various tissues. Sonapatha activates the expression of p53, pRb, Fas, FasL, IL-12, and caspases and inhibited nuclear factor kappa (NF-κB), cyclooxygenase (COX-2), tumor necrosis factor (TNFα), interleukin (IL6), P38 activated mitogen-activated protein kinases (MAPK), fatty acid synthetase (FAS), sterol regulatory element-binding proteins 1c (SREBP-1c), proliferator-activated receptor γ2 (PPARγ2), glucose transporter (GLUT4), leptin, and HPV18 oncoproteins E6 and E7 at the molecular level, which may be responsible for its medicinal properties. The phytoconstituents of Sonapatha including oroxylin A, chrysin, and baicalein inhibit the replication of SARS-CoV-2 (COVID-19) in in vitro and in vivo experimental models, indicating its potential to contain COVID-19 infection in humans. The experimental studies in various preclinical models validate the use of Sonapatha in ethnomedicine and Ayurveda.

scholarly journals Current Status of Putative Animal Sources of SARS-CoV-2 Infection in Humans: Wildlife, Domestic Animals and Pets

2021 ◽  
Vol 9 (4) ◽  
pp. 868
Author(s):  
Max Maurin ◽  
Florence Fenollar ◽  
Oleg Mediannikov ◽  
Bernard Davoust ◽  
Christian Devaux ◽  
...  
Keyword(s):  
Animal Species ◽  
Biological Properties ◽  
Experimental Models ◽  
Current Data ◽  
The Body ◽  
Receptor Expression ◽  
Current Status ◽  
Susceptible Animal

SARS-CoV-2 is currently considered to have emerged from a bat coronavirus reservoir. However, the real natural cycle of this virus remains to be elucidated. Moreover, the COVID-19 pandemic has led to novel opportunities for SARS-CoV-2 transmission between humans and susceptible animal species. In silico and in vitro evaluation of the interactions between the SARS-CoV-2 spike protein and eucaryotic angiotensin-converting enzyme 2 (ACE2) receptor have tentatively predicted susceptibility to SARS-CoV-2 infection of several animal species. Although useful, these data do not always correlate with in vivo data obtained in experimental models or during natural infections. Other host biological properties may intervene such as the body temperature, level of receptor expression, co-receptor, restriction factors, and genetic background. The spread of SARS-CoV-2 also depends on the extent and duration of viral shedding in the infected host as well as population density and behaviour (group living and grooming). Overall, current data indicate that the most at-risk interactions between humans and animals for COVID-19 infection are those involving certain mustelids (such as minks and ferrets), rodents (such as hamsters), lagomorphs (especially rabbits), and felines (including cats). Therefore, special attention should be paid to the risk of SARS-CoV-2 infection associated with pets.

scholarly journals Autophagy induction in atrophic muscle cells requires ULK1 activation by TRIM32 through unanchored K63-linked polyubiquitin chains

2019 ◽  
Vol 5 (5) ◽  
pp. eaau8857 ◽  
Author(s):  
M. Di Rienzo ◽  
M. Antonioli ◽  
C. Fusco ◽  
Y. Liu ◽  
M. Mari ◽  
...  
Keyword(s):  
Mouse Models ◽  
Muscle Atrophy ◽  
Ubiquitin Ligase ◽  
Muscle Dystrophy ◽  
Polyubiquitin Chains ◽  
Autophagy Induction ◽  
Atrophic Muscle ◽  
Autophagic Activity

Optimal autophagic activity is crucial to maintain muscle integrity, with either reduced or excessive levels leading to specific myopathies. LGMD2H is a muscle dystrophy caused by mutations in the ubiquitin ligase TRIM32, whose function in muscles remains not fully understood. Here, we show that TRIM32 is required for the induction of muscle autophagy in atrophic conditions using both in vitro and in vivo mouse models. Trim32 inhibition results in a defective autophagy response to muscle atrophy, associated with increased ROS and MuRF1 levels. The proautophagic function of TRIM32 relies on its ability to bind the autophagy proteins AMBRA1 and ULK1 and stimulate ULK1 activity via unanchored K63-linked polyubiquitin. LGMD2H-causative mutations impair TRIM32’s ability to bind ULK1 and induce autophagy. Collectively, our study revealed a role for TRIM32 in the regulation of muscle autophagy in response to atrophic stimuli, uncovering a previously unidentified mechanism by which ubiquitin ligases activate autophagy regulators.

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