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Exploring the effects of taurolidine on tumor weight and microvessel density in a murine model of osteosarcoma

Oncology Research 2024年第7期32卷 1163-1172页

作者： lisanne k.a.neijenhuis LEUTA L.NAUMANN SONIA A.M.FERkEL SAMUEL J.S.RUBIN STEPHAN ROGALLA Division of Gastroenterology and Hepatology Department of MedicineSchool of MedicineStanford UniversityStanford94305USA Department of Surgery Leiden University Medical CenterLeiden2333 ZAThe Netherlands Centre for Human Drug Research Leiden2333 CLThe Netherlands Department of General VisceralVascular and Thoracic SurgeryCharite University Medicine BerlinBerlin10117Germany

Background:Osteosarcoma is the most common malignant primary bone *** prognosis for patients with disseminated disease remains very poor despite recent advancements in ***,current treatment regimens bear a signiﬁcant risk of serious side ***,there is an unmet clinical need for effective therapies with improved safety proﬁ*** is an antibacterial agent that has been shown to induce cell death in different types of cancer cell ***:In this study,we examined both the antineoplastic and antiangiogenic effects of taurolidine in animal models of osteosarcoma.k7M2 murine osteosarcoma cells were injected,both intramuscular and intraperitoneal,into 60 BALB/c mice on day *** were then randomized to receive treatment with taurolidine 2%(800 mg/kg),taurolidine 1%(400 mg/kg),or NaCl 0.9%control for seven days by intravenous or intraperitoneal ***:After 35 days,mice were euthanized,and the tumors were harvested for *** mice were excluded from the analysis due to *** weight was signiﬁcantly lower in the 2%taurolidine intraperitoneal treatment group from day 9 to 21,consistent with elevated mortality in this *** tumor weight was signiﬁcantly lower in the 1%(p=0.003)and 2%(p=0.006)intraperitoneal taurolidine treatment groups compared to the *** antineoplastic effects were observed on intramuscular tumors or for intravenous administration of *** were no signiﬁcant differences in microvessel density or mitotic rate between treatment *** body weight and elevated mortality in the 2%taurolidine intraperitoneal group suggest that the lower 1%dose is ***:In conclusion,there is no evidence of antiangiogenic activity,and the antitumor effects of taurolidine on osteosarcoma observed in this study are ***,its toxic proﬁle grants further *** these observations,further research is necessary to

关键词： Osteosarcoma Taurolidine Cancer treatment Chemotherapy Murine models

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Active bleb formation is abated in Lytechinus variegatus red spherule coelomocytes after disruption of acto-myosin contractility

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Integrative Zoology 2008年第2期3卷 115-122页

作者： lisanne D’ANDREA-WINSLOW Amy k.NOVITSkI Department of Biology Northwestern CollegeSt.PaulMinnesotaUSA

Red spherule coelomocytes are immune cells in the sea urchin Lytechinus variegatus that have been characterizedas motile O2 transport cells. Video microscopy of living red spherule coelomocytes reveals a constitutive, dynamicarray of cellular morphologies and movements. Cells continuously send out and retract membrane blebs all over thecell surface as part of their normal cellular physiology. Disruption of microtubules by perfusion with either nocodazoleor taxol had no effect on bleb formation or motility. Perfusion with cytochalasin B abated bleb formation andrevealed cells that exhibited multiple small spheres attached by short membrane extensions. Attenuation of blebbingand intracellular organelle motility were restored by washing out with cytochalasin B. Treatment with phalloidinalso abated bleb formation and revealed a smooth, spherical cellular morphology. The effects of phalloidin werecompletely reversible after washout. Red spherule coelomocytes treated with blebbistatin rounded up with anirreversible retraction of blebs into surface blebs that were greatly reduced in size, number and motility. Normal cellsurface bleb formation and intracellular organelle motility were not restored after washout of the drug. These resultsindicate that the acto-myosin contractile mechanism contributes to the dynamics of constitutive cell surface membraneblebbing in invertebrate immune cells.

关键词： sea urchin invertebrate immunology coelomocyte cell motility cell movement microfilament dynamics

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