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Protein-tyrosine kinase Pyk2 mediates endothelin-induced p38 MAPK activation in glomerular mesangial cells.

Endothelin-1 (ET-1), a member of a family of 21 amino acid peptides possessing vasoconstrictor properties, is known to stimulate mesangial cell proliferation. In this study, ET-1 (100 nm) induced a rapid activation of p21(ras) in human glomerular mesangial cells (HMC). Inhibition of Src family tyrosine kinase activation with [4-Amino-5-(4-methylphenyl)-7-(t-butyl)pyrazolo[3,4-d]pyrimidine] or chelation of intracellular free calcium with 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid acetoxymethyl ester significantly decreased ET-1dependent p21(ras) activation and suggested the involv

Identification of a serum-inducible messenger RNA (5B10) as the mouse homologue of calcyclin: tissue distribution and expression in metastatic, ras-transformed NIH 3T3 cells.

A mouse mRNA, provisionally designated 5B10, has been cloned based on its inducibility by serum in quiescent murine fibroblasts. Here we report the full-length complementary DNA sequence and a partial characterization. There are about five copies of the gene in the mouse genome. Sequence analysis of the 5B10 coding region reveals 94 and 97% amino acid identity to human and rat calcyclin, respectively. Although the coding region has been highly conserved during evolution of the rodent and human genomes, the untranslated flanking sequences differ significantly. A protein of Mr about 8000 was pro

A functional activating protein 1 (AP-1) site regulates matrix metalloproteinase 2 (MMP-2) transcription by cardiac cells through interactions with JunB-Fra1 and JunB-FosB heterodimers.

Enhanced synthesis of a specific matrix metalloproteinase, MMP-2, has been demonstrated in experimental models of ventricular failure and in cardiac extracts from patients with ischaemic cardiomyopathy. Cultured neonatal rat cardiac fibroblasts and myocytes were used to analyse the determinants of MMP-2 synthesis, including the effects of hypoxia. Culture of rat cardiac fibroblasts for 24 h in 1% oxygen enhanced MMP-2 synthesis by more than 5-fold and augmented the MMP-2 synthetic responses of these cells to endothelin-1, angiotensin II and interleukin 1beta. A series of MMP-2 promoter-lucifer

Transcriptional regulation of the tartrate-resistant acid phosphatase (TRAP) gene by iron.

Tartrate-resistant acid phosphatase (TRAP) was first identified in cells from patients with hairy cell leukaemia. Subsequently, it has been … ity was blocked by desferrioxamine. Cells transfected with another luciferase construct driven by a simian virus 40 promoter did not show any increase of luciferase activity with FeTF. These data indicate that expression of TRAP is regulated by iron and that this regulation is exerted at the level of gene transcription. The transfection experiments also suggest t …

Characterization of novel macrophage cell lines derived from goat and sheep blood and their susceptibility to ruminant virus infections.

Macrophages are present in all vertebrate tissues and play a key role in both the prevention and pathogenesis of infectious diseases. In vitro cultures of macrophages provide a valuable tool for studying the innate immune functions of macrophages and macrophage-pathogen interactions in specific animal species. We previously demonstrated that porcine macrophages were effectively immortalized by transferring the simian virus 40 large T antigen (SV40LT) gene and porcine telomerase reverse transcriptase (pTERT) gene using lentiviral vectors. In the present study, we investigated whether this immor…

Adrenocortical tumorigenesis in transgenic mice: the role of luteinizing hormone receptor and transcription factors GATA-4 and GATA-61.

Transgenic (TG) mice, bearing the Simian Virus 40 T-antigen (Tag) under a 6-kb fragment of the murine inhibin alpha-subunit promoter (inhalpha), develop gonadal tumors of granulosa or Leydig cell origin with 100% penetrance by the age of 5-7 months. When these TG mice were gonadectomized prepubertally, between 21-25 days of life, adrenal gland tumors were observed in each mouse by the age of 5-7 months. No adrenal tumors were detected in any intact TG, gonadectomized or intact or control non-TG littermates. The adrenocortical tumors appeared to originate from the X-zone of the adrenal cortex. …

Abnormal, error-prone bypass of photoproducts by xeroderma pigmentosum variant cell extracts results in extreme strand bias for the kinds of mutations induced by UV light.

Xeroderma pigmentosum (XP) is a rare genetic disease characterized by a greatly increased susceptibility to sunlight-induced skin cancer. Ce … MSU-1.2, for the ability to replicate a UV-irradiated form I M13 phage. The M13 template contains a simian virus 40 origin of replication located directly to the left or to the right of the target gene, lacZalpha, so that the template for the leading and lagging strands of DNA replication is defined. Reduction of replication to approximately 37% of the control va …

Establishment of micrometastatic carcinoma cell lines: a novel source of tumor cell vaccines.

BACKGROUND: Cancer cells of microscopic metastases can be envisaged as ideal constituents for the development of a genetically modified, aut … o Petri dishes, and 200-300 epithelial cells per plate were microinjected with DNA encoding for the simian virus 40 (SV40) large T antigen. Cells were screened at various time points for expression of large T antigen and epithelial markers, such as cytokeratins, prostate-specific antigen, prolactin-inducible protein, or intestinal-specific annexin; their bone mar …

Novel Human Polyomavirus Noncoding Control Regions Differ in Bidirectional Gene Expression according to Host Cell, Large T-Antigen Expression, and Clinically Occurring Rearrangements.

Human polyomavirus (HPyV) DNA genomes contain three regions denoted the early viral gene region (EVGR), encoding the regulatory T-antigens a … n was less variable and showed comparable activity levels. Transfection of HEK293T cells expressing simian virus 40 (SV40) large T antigen (LTag) increased EVGR expression for most HPyV NCCRs, which correlated with the number of LTag-binding sites (Spearman's r, 0.625; P < 0.05) and decreased following SV40 LTag small interfering RNA (siRNA) knockdown. LTag-depen …

Malignant pleural mesothelioma.

Malignant pleural mesothelioma remains a difficult tumor to treat, much less cure. Currently, the best chance for long-term survival lies with early diagnosis and aggressive surgical extirpation, but given the typically long delay between the onset of symptoms and diagnosis, this is only possible with a high index of suspicion and an aggressive diagnosis workup. Early referral to a tertiary center experienced in the treatment of MPM may be important for several reasons: (1) decreased risk of tumor spread along multiple thoracenesis/biopsy tracts, (2) the availability of specialized pathologic

Twenty-fifth annual general meeting of the British Association for Cancer Research. Abstracts of invited and profferred papers.

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… Fragments of the simian virus 40 transforming gene facilitate transformation of rat embryo cells. 79 17 9 1982 5189 5193 Proc Natl Acad Sci U S A PMC346860 6291029 10.1073/pnas.79.17.5189 Connors T. A. Goddard P. M. Merai K. Ross W. C. Wilman D. E. …

Clinical review: specific aspects of acute renal failure in cancer patients.

Acute renal failure (ARF) in cancer patients is a dreadful complication that causes substantial morbidity and mortality. Moreover, ARF may preclude optimal cancer treatment by requiring a decrease in chemotherapy dosage or by contraindicating potentially curative treatment. The pathways leading to ARF in cancer patients are common to the development of ARF in other conditions. However, ARF may also develop due to etiologies arising from cancer treatment, such as nephrotoxic chemotherapy agents or the disease itself, including post-renal obstruction, compression or infiltration, and metabolic o

Targeting P53 as a Future Strategy to Overcome Gemcitabine Resistance in Biliary Tract Cancers.

Gemcitabine-based chemotherapy is the current standard treatment for biliary tract cancers (BTCs) and resistance to gemcitabine remains the clinical challenge. TP53 mutation has been shown to be associated with poor clinicopathologic characteristics and survival in patients with BTCs, indicating that p53 plays an important role in the treatment of these cancers. Herein, we comprehensively reviewed previous BTC preclinical research and early clinical trials in terms of p53, as well as novel p53-targeted treatment, alone or in combination with either chemotherapy or other targeted therapies in B

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… Simian virus 40-transformed cells express new species of proteins precipitable by anti-simian virus 40 tumor serum. J. Virol. 1979;31:472–483. doi: 10.1128/JVI.31.2.472-483.1979. 29. Melero J.A., Stitt D.T., Mangel W.F., Carroll R.B. … Characterization of different tumor antigens present in cells transformed by simian virus 40. Cell. 1979;18:335–346. doi: 10.1016/0092-8674(79)90053-9. 31. Eliyahu D. Participation of p53 cellular tumour antigen in transformation of normal embryonic cells. …

Kidney Biopsy Findings Among Allogenic Hematopoietic Stem Cell Transplant Recipients With Kidney Injury: A Case Series.

RATIONALE AND OBJECTIVE: The incidence of kidney disease is high in patients after allogeneic hematopoietic cell transplantation (aHCT). Although rarely performed, kidney biopsy may be useful to make a precise diagnosis because several mechanisms and risk factors can be involved, and to adjust the treatment accordingly. This case series aimed to report the spectrum of biopsy findings from patients with kidney injury after aHCT. STUDY DESIGN: Single-center retrospective case series. SETTING AND PARTICIPANTS: All individuals who underwent a native kidney biopsy, among all adult patients who re

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… Immunohistochemistry studies for simian virus 40 (SV40), cytomegalovirus, adenovirus, Epstein-Barr virus, herpes simplex virus (HSV)-1, and HSV-2 were performed when relevant. … (B) Immunohistochemistry study using antibody for simian virus 40 reveals strong nuclear staining in tubular epithelial cells and parietal epithelial cells. Original magnification, ×200. Figure 2 Kidney biopsy findings in patient 3 with BK virus nephritis. …

Twenty-five years of type I interferon-based treatment: a critical analysis of its therapeutic use.

The clinical exploitation of type I interferon (IFN) as an antiviral and antineoplastic agent is based on the properties originally attributed to this cytokine family, with schedules reflecting only their antiviral and antiproliferative activities. Nevertheless, type I IFN has emerged as a central activator of the innate immunity. As current schedules of treatment for chronic hepatitis C and for hematological and solid tumors, based on the continuous administration of recombinant type I IFN or pegylated formulations, disregard viral resistance, host genetic variants predicting treatment outcom

Муриновая корреляция саркомы Эпштейна-Барра и саркомы Капози (MHV-68) представляет собой ценную модель для оценки чувствительности к антивирусным препаратам и взаимодействия в комбинаторных наркотиках.

Человеческие герпесвирусы представляют собой основные человеческие патогены. Особый интерес представляют члены подсемейства &lt; &lt; Герпесвирина &gt; &gt; , поскольку они вызывают хронические заболевания, такие, как рак, изменяя клеточные процессы и вводя клетки отдыха в непрерывно расширяющуюся фазу. Кроме того, в центре внимания постоянно находятся аутоиммунные заболевания, такие, как множественный склероз. Прототипический вирус человека - герпесвирус - вирус Эпштейна - Барра (ЭБВ) оказался трудно проанализировать в целях развития противовирусной терапии из-за проблем, связанных с распрост

Methamphetamine induces transcriptional changes in cultured HIV-infected mature monocytes that may contribute to HIV neuropathogenesis.

HIV-associated neurocognitive impairment (HIV-NCI) persists in 15-40% of people with HIV (PWH) despite effective antiretroviral therapy. HIV-NCI significantly impacts quality of life, and there is currently no effective treatment for it. The development of HIV-NCI is complex and is mediated, in part, by the entry of HIV-infected mature monocytes into the central nervous system (CNS). Once in the CNS, these cells release inflammatory mediators that lead to neuroinflammation, and subsequent neuronal damage. Infected monocytes may infect other CNS cells as well as differentiate into macrophages,

Mucosal-Associated Invariant T Cells in Health and Disease.

Mucosal-associated invariant T (MAIT) cells are a population of evolutionarily conserved, unconventional innate-like T lymphocytes that are restricted by major histocompatibility complex Class I-related (MR1) molecules. They can be activated either in a T-cell receptor-MR1- or cytokine-dependent manner. Activated MAIT cells play crucial roles in maintaining homeostasis and the fine regulation of the immune system. This review presents a systematic exploration of the development, biological characteristics, and multiple effects of MAIT cells in health and various diseases. In healthy individual

Antitumorigenic Evaluation of Thalidomide Alone and in Combination with Cisplatin in DBA2/J Mice.

Thalidomide's reported ability to inhibit angiogenesis has led to clinical trials determining its effectiveness in combating various types of cancer. This study explored thalidomide's antitumorigenic potential when administered alone and in combination with cisplatin to DBA2/J mice whose tumors were induced by murine erythroleukemic cells. Thalidomide treatment alone produced no significant inhibitory effect on tumor development and metastasis. Mice that received both drugs had significantly lower incidences of both primary and secondary tumors as compared to the untreated control group. Cispl

Micro and nanotechnologies: The little formulations that could.

The first publication of micro- and nanotechnology in medicine was in 1798 with the use of the Cowpox virus by Edward Jenner as an attenuated vaccine against Smallpox. Since then, there has been an explosion of micro- and nanotechnologies for medical applications. The breadth of these micro- and nanotechnologies is discussed in this piece, presenting the date of their first report and their latest progression (e.g., clinical trials, FDA approval). This includes successes such as the recent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines from Pfizer, Moderna, and Janssen (

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… The first viral vector therapy was reported in 1972 78 when Simian Virus 40 was modified. The first FDA approved viral vector was in 2015, 79 , 80 utilizing herpes simplex virus 1 (HSV‐1) to deliver immunomodulatory proteins to treat melanoma. … Biochemical method for inserting new genetic information into DNA of Simian Virus 40: circular SV40 DNA molecules containing lambda phage genes and the galactose operon of Escherichia coli . Proc Natl Acad Sci U S A. 1972;69(10):2904‐2909. doi: 10.1073/pnas.69.10.2904 79. …