Search results for " experimental model"

showing 6 items of 6 documents

Experimental investigations on a model of cryogenic edema.

1987

The role of mechanisms underlying formation and progression of vasogenic brain edema is investigated. On this purpose, cerebral edema was produced by cortical freezing in two different brain situations in rabbits (with or without replacement of bone flap). BBB (Blood-Brain Barrier) breakdown was evaluated by observation of Evans blue extravation, while a histopathological evaluation was carried out by light and transmission electron microscopy. Water content of brain tissue was determined by the wet/dry weight ratio method. Comparison of extension and intensity of cerebral edema between these two groups of animals shows a statistically significant difference: there was evidence of higher wa…

Body WaterSettore MED/27 - NeurochirurgiaBlood-Brain BarrierReplantationFreezingAnimalsBrain EdemaBrain Edema; Blood-Brain Barrier; Body Water; CraniotomyRabbitsCerebral edema experimental modelCraniotomySurgical FlapsJournal of neurosurgical sciences
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A New Prosthetic Implant for Inguinal Hernia Repair: Its Features in a Porcine Experimental Model

2011

Even after more than 100 years of inguinal hernia repair, the rate of complications and recurrence remains unacceptably high. In the last decades, few effective advances in surgical technique and materials have been made. The authors see them as minor adjustments in the shape and materials of the prosthetic implants. Still, the underlying genesis of inguinal hernia remains undefined. Based upon this, it seems the surgical repair of inguinal protrusions cannot be based upon the pathogenesis because the etiology to date has not been addressed. Most hernia repairs are performed with some degree of point fixation (sutures/tacks) to stop the mesh from migrating and creating high recurrence rates…

MaleSettore MED/18 - Chirurgia GeneraleTissue ScaffoldsHernia Inguinal Biocompatible materials Prostheses and implants Incorporation Guided tissue regeneration Tissue scaffoldingGuided Tissue RegenerationSwineAnimalsits features in a porcine experimental model [A new prosthetic implant for inguinal hernia repair]Hernia InguinalProstheses and ImplantsA new prosthetic implant for inguinal hernia repair: its features in a porcine experimental modelPolypropylenes
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Neuroprotection by erythropoietin administration after experimental traumatic brain injury.

2007

A large body of evidence indicates that the hormone erythropoietin (EPO) exerts beneficial effects in the central nervous system (CNS). To date, EPO's effect has been assessed in several experimental models of brain and spinal cord injury. This study was conducted to validate whether treatment with recombinant human EPO (rHuEPO) would limit the extent of injury following experimental TBI. Experimental TBI was induced in rats by a cryogenic injury model. rHuEPO or placebo was injected intraperitoneally immediately after the injury and then every 8 h until 2 or 14 days. Forty-eight hours after injury brain water content, an indicator of brain edema, was measured with the wet-dry method and bl…

MaleTime FactorsBrain EdemaFunctional LateralityRats Sprague-Dawleychemistry.chemical_compoundTraumatic brain injuryMedicineAnalysis of Variance Animals Blood-Brain Barrier; drug effects Brain Edema; drug therapy/etiology Brain Infarction; drug therapy/etiology Brain Injuries; complications/drug therapy Disease Models; Animal Erythropoietin; administration /&/ dosage Evans Blue; diagnostic use Functional Laterality Humans Male Neurologic Examination Neuroprotective Agents; administration /&/ dosage Rats Rats; Sprague-Dawley Reaction Time; drug effects Recombinant Proteins Time Factorsadministration /&/ dosageSpinal cord injuryEvans BlueNeurologic ExaminationGeneral Neuroscienceexperimental models of brain and spinal cord injuryExtravasationNeuroprotectionRecombinant Proteinsmedicine.anatomical_structureNeuroprotective AgentsBlood-Brain BarrierAnesthesiadiagnostic usemedicine.drugEvans BlueBrain InfarctionTraumatic brain injuryCentral nervous systemrecombinant human EPO (rHuEPO)PlaceboNeuroprotectionReaction TimeAnimalsHumansMolecular BiologyErythropoietinAnalysis of VarianceNeuroscience (all)business.industryAnimaldrug therapy/etiologymedicine.diseaseRatsDisease Models AnimalchemistryErythropoietindrug effectsBrain InjuriesDisease Modelsrecombinant human EPO (rHuEPO); experimental models of brain and spinal cord injury; NeuroprotectionNeurology (clinical)Sprague-Dawleybusinesscomplications/drug therapyDevelopmental BiologyBrain research
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Identification of calcium sensing receptor (CaSR) mRNA-expressing cells in normal and injured rat brain

2009

Calcium sensing receptor (CaSR), isolated for the first time from bovine and human parathyroid, is a G-protein-coupled receptors that has been involved in diverse physiological functions. At present a complete in vivo work on the identification of CaSR mRNA-expressing cells in the adult brain lacks and this investigation was undertaken in order to acquire more information on cell type expressing CaSR mRNA in the rat brain and to analyse for the first time its expression in different experimental models of brain injury. The expression of CaSR mRNAs was found mainly in scattered cells throughout almost all the brain regions. A double labeling analysis showed a colocalization of CaSR mRNA expr…

Malemedicine.medical_specialtyTime FactorsCentral nervous systemHippocampusCell CountSettore BIO/11 - Biologia MolecolareBiologySettore BIO/09 - Fisiologiachemistry.chemical_compoundSeizuresInternal medicineSettore BIO/10 - BiochimicaCaSRmedicineAnimalsRNA MessengerRats WistarIbotenic AcidMolecular BiologyIn Situ HybridizationNeuronsKainic AcidGeneral NeuroscienceDentate gyrusBrainColocalizationImmunohistochemistryRatsOligodendrogliamedicine.anatomical_structureEndocrinologynervous systemchemistryBrain InjuriesNeurogliaNeurology (clinical)Pyramidal cellCaSR; BrainCalcium sensing receptor (CaSR) isolated for the first time from bovine and human parathyroid is a G-protein-coupled receptors that has been involved in diverse physiological functions. At present a complete in vivo work on the identification of CaSR mRNA-expressing cells in the adult brain lacks and this investigation was undertaken in order to acquire more information on cell type expressing CaSR mRNA in the rat brain and to analyse for the first time its expression in different experimental models of brain injury. The expression of CaSR mRNAs was found mainly in scattered cells throughout almost all the brain regions. A double labeling analysis showed a colocalization of CaSR mRNA expression in neurons and oligodendrocytes whereas it was not found expressed both in the microglia and in astrocytes. One week after kainate-induced seizure CaSR was found in the injured CA3 region of the hippocampus and very interestingly it was found up-regulated in the neurons of CA1-CA2 and dentate gyrus. Similarly 1 week following ibotenic acid injection in the hippocampus CaSR mRNA expression was increased in oligodendrocytes both in the lesioned area and in the contralateral CA1-CA3 pyramidal cell layers and dentate gyrus. One week after needle-induced mechanical lesion an increase of labeled cells expressing CaSR mRNA was observed along the needle track. In conclusion the present results contribute to extend available data on cell type-expressing CaSR in normal and injured brain and could spur to understand the role of CaSR in repairing processes of brain injury.Receptors Calcium-SensingIbotenic acidDevelopmental BiologyAstrocyte
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DECORIN EFFECTS ON PROTEOMIC PROFILING OF BREAST CANCER CELLS: AN UPDATED STUDY

2015

The malignant carcinomas are characterized by several capabilities acquired by the neoplastic cells, among which the ability to invade the extracellular matrix (ECM) and to establish a crosstalk with several ECM components. Under this respect, the extracellular microenvironment is an entity extraordinarily rich of information with opposite signals. Our group has long undertaken the study of the effects of ECM molecules on the behavior of cancer cells in vitro. Among the studied molecules, the decorin was found to exert a non-permissive effect on the growth and motility of the transfected tumor cells. The decorin, belongs to the family of small leucine-rich proteoglycans (SLRP) and is involv…

The malignant carcinomas are characterized by several capabilities acquired by the neoplastic cells among which the ability to invade the extracellular matrix (ECM) and to establish a crosstalk with several ECM components. Under this respect the extracellular microenvironment is an entity extraordinarily rich of information with opposite signals. Our group has long undertaken the study of the effects of ECM molecules on the behavior of cancer cells in vitro. Among the studied molecules the decorin was found to exert a non-permissive effect on the growth and motility of the transfected tumor cells. The decorin belongs to the family of small leucine-rich proteoglycans (SLRP) and is involved physiologically in the fibrillogenesis of collagen. In the last few year a new anti-oncogenic role has been proposed for decorin1. This study aimed to implement the knowledge on the effects of ectopic decorin on breast cancer cells using as a reference point the results already achieved by our research group2 on the experimental model format. By breast cancer cell line 8701-BC and its transfected clone DEC-C2. The extension of the proteomic analysis combined with the mass spectrometry allowed to triplicate the number of identified proteins in our model. Among the newly identified proteins were members of the classes of metabolic enzymes S100 family and cell motility proteins which revealed a net decrease in the decorin transfected cells. Of considerable importance is the observation that these classes of proteins are the most involved in metastatic progression. These results confirm and reinforce the anti-oncogenic role hypothesized for decorin. The work was co-funded by the Italian 5x1000 to COBS.DECORIN
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A regenerative 3D scaffold for inguinal hernia repair. MR imaging and histological cross evidence. Qualitative study

2021

Abstract Background Inguinal hernia is a degenerative disease occurring in a high motile surround. Stopping degeneration and promoting tissue regeneration should be the treatment goal. Groin hernias are conventionally managed with static flat meshes, mostly fixated to the delicate inguinal environment. Far from a regenerative effect, the biologic response of conventional hernia meshes is characterized by a foreign body reaction leading to a stiff/shrunken scar plate, which is often the source of unpleasant complications. Recently, a newly engineered 3D device for inguinal hernia repair – ProFlor-has been developed to produce a regenerative biological response. Unlike conventional hernia mes…

medicine.medical_specialtySwineAdipose tissueHernia InguinalGroinProsthesesDegenerative diseaseMagnetic resonance imagingmedicineAnimalsHerniaHerniorrhaphymedicine.diagnostic_testGroinbusiness.industryInguinal herniaMagnetic resonance imagingHistologyGeneral MedicineSurgical Meshmedicine.diseaseInguinal herniamedicine.anatomical_structureHernia genesisPorcine experimental modelSurgeryRadiologyForeign bodybusinessRegenerative scaffolds
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