Search results for "fibroblast"

Antitumor Cell-Complex Vaccines Employing Genetically Modified Tumor Cells and Fibroblasts

2014

The present study evaluates the immune response mediated by vaccination with cell complexes composed of irradiated B16 tumor cells and mouse fibroblasts genetically modified to produce GM-CSF. The animals were vaccinated with free B16 cells or cell complexes. We employed two gene plasmid constructions: one high producer (pMok) and a low producer (p2F). Tumor transplant was performed by injection of B16 tumor cells. Plasma levels of total IgG and its subtypes were measured by ELISA. Tumor volumes were measured and survival curves were obtained. The study resulted in a cell complex vaccine able to stimulate the immune system to produce specific anti-tumor membrane proteins (TMP) IgG. In the g…

Nitinola matricas ar bioaktīvo slāni izveide pielietojumam asinsvadu ķirurģijā

2022

Darba mērķis bija izpētīt Nitinola matricas ar bioaktīvo slāni biosaderību un izvērtēt tās priekšrocības salīdzinājumā ar Nitinolu. Lai sasniegtu mērķus, tika veikta izpēte un apkopoti aktuālie zinātniskie dati par Nitinola pielietošanu asinsvadu ķirurģijā, plazmas elektrolītiskās oksidācijas Nitinola izveidi un biosaderību, nanodimantu biosaderību. Tika veikta Nitinola plazmas elektrolītiskā oksidēšana un iegūto biomateriālu raksturošana ar skenējošo elektronu mikroskopa metodi. Tika apstrādāti nitinola ar bioaktīvo nanodimantu pārklājumi un veikta to raksturošana ar fizikālām metodēm. Eksperimentāli tika izpētīta Nitinola matricas ar bioaktīvo nanodimantu slāņu biosaderība ar cilvēka fibr…

C8161-melanoomasolulinjan erittämien tekijöiden vaikutus fibroblastien hyaluronaanituotantoon

2011

Hyaluronaani on suurikokoinen soluväliaineen sokerirakenne. Se koostuu toistuvista sokerimolekyyleistä N- asetyyliglukosaminista ja glukuronihaposta. Hyaluronaani syntetisoidaan solukalvolla hyaluronaani- syntaasien (HAS) toimesta, joita nisäkkäillä on kolme isomuotoa (HAS1-3). Hyaluronaanin hajotus tapahtuu hyaluronidaasientsyymien (Hyal) toimesta. Hyaluronaanin pääasiallinen solukalvoreseptori on CD44, jonka avulla hyaluronaaniketjut ovat sitoutuneet solukalvoon. Hyaluronaania esiintyy runsaasti etenkin sidekudoksessa ja kerrostuneessa epiteelissä kuten ihossa. Hyaluronaanin määrän on havaittu lisääntyneen syövissä ja tämä korreloi useasti potilaan huonon ennusteen kanssa. Hyaluronaanin l…

ALS-RELATED FUS PROTEIN IS MISLOCALIZED TO CYTOPLASM AND RECRUITED INTO STRESS GRANULES IN FIBROBLASTS OF ASYMPTOMATIC FUS P525L MUTATION CARRIERS

Symptoms onset in Amyotrophic Lateral Sclerosis (ALS) occur when over 70% of motor neurons is already lost, suggesting a relatively long pre-symptomatic phase. The description of several genes linked to ALS (e.g., SOD1, FUS, TARDP, C9orf72) has now allowed identification of pre-symptomatic carriers. These pre-symptomatic (or even preclinical) carriers can be followed up with the aim to identify the very early clinical disease-related changes or a valuable biomarker. These efforts seem at present the best approach for the implementation of an early symptomatic therapy or for the disease prevention. In this work, we studied the expression of FUS protein in cultured skin fibroblasts from pre-s…

Transfection of lipoma cells with papilloma bovine virus subgenomic fragment.

1991

Abstract Lipoma cells with consistent chromosomal aberration have been transfected with plasmids carrying papilloma bovine virus subgenomic fragment (PBV 69). The succesful transformation of the cells was ascerted on the changed growth pattern of the cells in liquid medium, colony formation in soft agar and modified cell appearrance in electron microscopy; transfection with PBV 69 has not been, however, sufficient to immortalize lipoma cells.

SV40 transformed fibroblasts recognize the same 140 kD fibronectin chemotactic fragment as non-transformed cells

1985

SV40-virus-transformed human embryonal fibroblasts show an enhanced chemotactic response to the glycoprotein fibronectin. However, they recognize the same chemotactic active region as non-transformed fibroblasts. The result suggests that an enhancement of chemotaxis by fibroblasts which have been transformed with Simian Virus 40 is due not to the utilization of further chemotactic domains in the molecule, but to an increased sensitivity of the cells to the chemoattractant.

An arthritogenic alphavirus uses the α1β1 integrin collagen receptor

2005

Ross River (RR) virus is an alphavirus endemic to Australia and New Guinea and is the aetiological agent of epidemic polyarthritis or RR virus disease. Here we provide evidence that RR virus uses the collagen-binding alpha1beta1 integrin as a cellular receptor. Infection could be inhibited by collagen IV and antibodies specific for the beta1 and alpha1 integrin proteins, and fibroblasts from alpha1-integrin-/- mice were less efficiently infected than wild-type fibroblasts. Soluble alpha1beta1 integrin bound immobilized RR virus, and peptides representing the alpha1beta1 integrin binding-site on collagen IV inhibited virus binding to cells. We speculate that two highly conserved regions with…