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Taylor OG, Brzozowski JS, Skelding KA. Glioblastoma Multiforme: An Overview of Emerging Therapeutic Targets. Front Oncol 2019; 9:963. [PMID: 31616641 PMCID: PMC6775189 DOI: 10.3389/fonc.2019.00963] [Citation(s) in RCA: 222] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/11/2019] [Indexed: 12/26/2022] Open
Abstract
Glioblastoma multiforme (GBM) is the most common and aggressive malignant primary brain tumour in humans and has a very poor prognosis. The existing treatments have had limited success in increasing overall survival. Thus, identifying and understanding the key molecule(s) responsible for the malignant phenotype of GBM will yield new potential therapeutic targets. The treatment of brain tumours faces unique challenges, including the presence of the blood brain barrier (BBB), which limits the concentration of drugs that can reach the site of the tumour. Nevertheless, several promising treatments have been shown to cross the BBB and have shown promising pre-clinical results. This review will outline the status of several of these promising targeted therapies.
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Review |
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Brzozowski JS, Jankowski H, Bond DR, McCague SB, Munro BR, Predebon MJ, Scarlett CJ, Skelding KA, Weidenhofer J. Lipidomic profiling of extracellular vesicles derived from prostate and prostate cancer cell lines. Lipids Health Dis 2018; 17:211. [PMID: 30193584 PMCID: PMC6128989 DOI: 10.1186/s12944-018-0854-x] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 08/28/2018] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Extracellular vesicles (EVs) are produced and secreted from most cells of the body and can be recovered in biological fluids. Although there has been extensive characterisation of the protein and nucleic acid component of EVs, their lipidome has received little attention and may represent a unique and untapped source of biomarkers for prostate cancer diagnosis and prognosis. METHODS EVs were isolated from non-tumourigenic (RWPE1), tumourigenic (NB26) and metastatic (PC-3) prostate cell lines. Lipids were extracted and subsequently used for targeted lipidomics analysis for the quantitation of molecular lipid species. RESULTS A total of 187 molecular lipid species were quantitatively identified in EV samples showing differential abundance between RWPE1, NB26 and PC-3 EV samples. Fatty acids, glycerolipids and prenol lipids were more highly abundant in EVs from non-tumourigenic cells, whereas sterol lipids, sphingolipids and glycerophospholipids were more highly abundant in EVs from tumourigenic or metastatic cells. CONCLUSIONS This study identified differences in the molecular lipid species of prostate cell-derived EVs, increasing our understanding of the changes that occur to the EV lipidome during prostate cancer progression. These differences highlight the importance of characterising the EV lipidome, which may lead to improved diagnostic and prognostic biomarkers for prostate cancer.
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Brzozowski JS, Skelding KA. The Multi-Functional Calcium/Calmodulin Stimulated Protein Kinase (CaMK) Family: Emerging Targets for Anti-Cancer Therapeutic Intervention. Pharmaceuticals (Basel) 2019; 12:ph12010008. [PMID: 30621060 PMCID: PMC6469190 DOI: 10.3390/ph12010008] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/02/2019] [Accepted: 01/04/2019] [Indexed: 01/25/2023] Open
Abstract
The importance of Ca2+ signalling in key events of cancer cell function and tumour progression, such as proliferation, migration, invasion and survival, has recently begun to be appreciated. Many cellular Ca2+-stimulated signalling cascades utilise the intermediate, calmodulin (CaM). The Ca2+/CaM complex binds and activates a variety of enzymes, including members of the multifunctional Ca2+/calmodulin-stimulated protein kinase (CaMK) family. These enzymes control a broad range of cancer-related functions in a multitude of tumour types. Herein, we explore the cancer-related functions of these kinases and discuss their potential as targets for therapeutic intervention.
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Review |
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Brzozowski JS, Bond DR, Jankowski H, Goldie BJ, Burchell R, Naudin C, Smith ND, Scarlett CJ, Larsen MR, Dun MD, Skelding KA, Weidenhofer J. Extracellular vesicles with altered tetraspanin CD9 and CD151 levels confer increased prostate cell motility and invasion. Sci Rep 2018; 8:8822. [PMID: 29891991 PMCID: PMC5995928 DOI: 10.1038/s41598-018-27180-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 05/25/2018] [Indexed: 02/06/2023] Open
Abstract
To facilitate intercellular communication, cells release nano-sized, extracellular vesicles (EVs) to transfer biological cargo to both local and distant sites. EVs are enriched in tetraspanins, two of which (CD9 and CD151) have altered expression patterns in many solid tumours, including prostate cancer, as they advance toward metastasis. We aimed to determine whether EVs from prostate cells with altered CD9 and CD151 expression could influence cellular behaviour and increase the metastatic capabilities of non-tumourigenic prostate cells. EVs were isolated by ultrafiltration and characterised for their tetraspanin expression and size distribution. iTRAQ was used to identify differences between RWPE1 and tetraspanin-modified RWPE1 EV proteomes, showing an enrichment in protein degradation pathways. Addition of EVs from RWPE1 cells with reduced CD9 or increased CD151 abundance resulted in increased invasion of RWPE1 cells, and increased migration in the case of high CD151 abundance. We have been able to show that alteration of CD9 and CD151 on prostate cells alters the proteome of their resultant EVs, and that these EVs can enhance the migratory and invasive capabilities of a non-tumourigenic prostate cellular population. This work suggests that cellular tetraspanin levels can alter EVs, potentially acting as a driver of metastasis in prostate cancer.
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Research Support, Non-U.S. Gov't |
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Bond DR, Naudin C, Carroll AP, Goldie BJ, Brzozowski JS, Jankowski HM, Cairns MJ, Ashman LK, Scarlett CJ, Weidenhofer J. miR-518f-5p decreases tetraspanin CD9 protein levels and differentially affects non-tumourigenic prostate and prostate cancer cell migration and adhesion. Oncotarget 2017; 9:1980-1991. [PMID: 29416746 PMCID: PMC5788614 DOI: 10.18632/oncotarget.23118] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 11/15/2017] [Indexed: 11/25/2022] Open
Abstract
Tetraspanin CD9 is generally considered to be a metastasis suppressor, with decreased levels associated with progression and metastasis in many advanced stage cancers. Little is known about the cause of CD9 dysregulation in prostate cancer, however there are several miRNA-binding sites in the 3´UTR of the transcript suggesting it could be post-transcriptionally regulated. Using microarrays and luciferase assays in tumourigenic and non-tumourigenic prostate cell lines we identified miR-518f-5p as a regulator of the CD9 3'UTR gene expression, and decreased expression of endogenous CD9 in non-tumorigenic prostate RWPE1 and prostate cancer DU145 cells. This resulted in differential functional effects, in which RWPE1 cells showed increased migration and decreased adhesion to extracellular matrix substrates, whereas DU145 cells showed decreased migration and increased adhesion. Moreover, overexpression of miR-518f-5p significantly increased proliferation between 48h and 72h in normal RWPE1 cells, with no effect on tumourigenic DU145 cell proliferation. These results show that tetraspanin CD9 is regulated by miRNAs in prostate cell lines and that due to differential functional effects in non-tumourigenic versus tumourigenic prostate cells, miR-518f-5p may be an effective biomarker and/or therapeutic target for prostate cancer progression.
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Murray HC, Miller K, Brzozowski JS, Kahl RGS, Smith ND, Humphrey SJ, Dun MD, Verrills NM. Synergistic Targeting of DNA-PK and KIT Signaling Pathways in KIT Mutant Acute Myeloid Leukemia. Mol Cell Proteomics 2023; 22:100503. [PMID: 36682716 PMCID: PMC9986649 DOI: 10.1016/j.mcpro.2023.100503] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 12/19/2022] [Accepted: 01/13/2023] [Indexed: 01/21/2023] Open
Abstract
Acute myeloid leukemia (AML) is the most common and aggressive form of acute leukemia, with a 5-year survival rate of just 24%. Over a third of all AML patients harbor activating mutations in kinases, such as the receptor tyrosine kinases FLT3 (receptor-type tyrosine-protein kinase FLT3) and KIT (mast/stem cell growth factor receptor kit). FLT3 and KIT mutations are associated with poor clinical outcomes and lower remission rates in response to standard-of-care chemotherapy. We have recently identified that the core kinase of the non-homologous end joining DNA repair pathway, DNA-PK (DNA-dependent protein kinase), is activated downstream of FLT3; and targeting DNA-PK sensitized FLT3-mutant AML cells to standard-of-care therapies. Herein, we investigated DNA-PK as a possible therapeutic vulnerability in KIT mutant AML, using isogenic FDC-P1 mouse myeloid progenitor cell lines transduced with oncogenic mutant KIT (V560G and D816V) or vector control. Targeted quantitative phosphoproteomic profiling identified phosphorylation of DNA-PK in the T2599/T2605/S2608/S2610 cluster in KIT mutant cells, indicative of DNA-PK activation. Accordingly, proliferation assays revealed that KIT mutant FDC-P1 cells were more sensitive to the DNA-PK inhibitors M3814 or NU7441, compared with empty vector controls. DNA-PK inhibition combined with inhibition of KIT signaling using the kinase inhibitors dasatinib or ibrutinib, or the protein phosphatase 2A activators FTY720 or AAL(S), led to synergistic cell death. Global phosphoproteomic analysis of KIT-D816V cells revealed that dasatinib and M3814 single-agent treatments inhibited extracellular signal-regulated kinase and AKT (RAC-alpha serine/threonine-protein kinase)/MTOR (serine/threonine-protein kinase mTOR) activity, with greater inhibition of both pathways when used in combination. Combined dasatinib and M3814 treatment also synergistically inhibited phosphorylation of the transcriptional regulators MYC and MYB. This study provides insight into the oncogenic pathways regulated by DNA-PK beyond its canonical role in DNA repair and demonstrates that DNA-PK is a promising therapeutic target for KIT mutant cancers.
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Triebling AT, Długosz J, Brzozowski J, Andrzejewska A, Wereszczyńska U, Gabryelewicz A. The renal lysosomes in acute experimental pancreatitis in dogs treated with prostacyclin (PGI2). Pathol Res Pract 1984; 178:280-8. [PMID: 6371745 DOI: 10.1016/s0344-0338(84)80111-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The inflammatory process in pancreas affects the function and structure of kidneys both by enzymatic toxemia and impairment of the renal circulation. In this study the stability of renal lysosomes in AEP in dogs treated with cytoprotective agent PGI2 was investigated. AEP was induced by injection of the bile and trypsin into the pancreatic duct; experiments were terminated after 12 hours. In lysosomal enriched subfraction of the kidney cortex (sedimenting in 15 000 x g) in untreated group (N = 5) relative free activity (r.f.a.) of cathepsins (Cs), acid phosphatase (APh) and beta-glucuronidase (BG) increased to 51,67 and 62% respectively, whereas in healthy dogs (N = 6) these activities were 20,38 and 25%. In dogs (N = 6) treated with PGI2 at the dose of 20 ng/kg/min. during 12 hrs, the r.f.a. of Cs, APh and BG was 18,40 and 49%, whereas in dogs (N = 5) additionally pretreated during 1 hr before induction of AEP with the same dose of PGI2, its values achieved 19,40 and 47% respectively. Our results suggest the stabilizing effect of PGI2 on kidney lysosomes damaged in acute experimental pancreatitis in dog. As possible mechanisms of prostacyclin action are discussed: limitation of necrotic process in the pancreas; improvement of renal haemodynamics; direct cytoprotective effect on the kidney.
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Eriksson LG, Johnson T, Hellsten T, Giroud C, Kiptily VG, Kirov K, Brzozowski J, DeBaar M, DeGrassie J, Mantsinen M, Meigs A, Noterdaeme JM, Staebler A, Testa D, Tuccillo A, Zastrow KD. Plasma rotation induced by directed waves in the ion-cyclotron range of frequencies. PHYSICAL REVIEW LETTERS 2004; 92:235001. [PMID: 15245162 DOI: 10.1103/physrevlett.92.235001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2003] [Indexed: 05/24/2023]
Abstract
Changes of the toroidal plasma rotation induced by directed waves in the ion-cyclotron range of frequencies (ICRF) have been identified experimentally for the first time on the JET tokamak. The momentum carried by the waves is initially absorbed by fast resonating ions, which subsequently transfer it to the bulk plasma. Thus, the results provide evidence for the influence of ICRF heated fast ions on plasma rotation.
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Lawson KD, Barnsley R, Maggi CF, Tyrrell S, Beldishevski M, Brzozowski J, Buckley M, Cass G, Elevant T, Griph S, Heesterman P, Hogben C, Jennison M, Stamp MF, Williams J, Zastrow KD. Enhancements to the JET poloidally scanning vacuum ultraviolet∕visible spectrometers. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:10D536. [PMID: 23130795 DOI: 10.1063/1.4745213] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Enhancements to the JET poloidally scanning spectrometers are presented, which will aid the exploitation of the recently installed ITER-like wall in JET. They include the installation of visible filter∕photomultiplier tube assemblies and spectrometers and the replacement of large rotating mirrors in the JET vacuum with small oscillating mirrors outside. The upgrade has resulted in a more robust and reliable diagnostic than before, which is described. Drifts in the mirror angle reconstructed from quadrature encoder signals are found, a reference signal being required. The use of the small scanning mirrors necessitated the inclusion of focusing mirrors to maintain throughput into the vacuum ultraviolet spectrometers. The mirror design has taken account of the extreme sensitivity of the focusing to the grazing angle of incidence, an aspect of importance in the design of grazing incidence focusing components on future machines, such as ITER. The visible system has been absolutely calibrated using an in-vessel light source.
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Brzozowski J, Długosz J, Triebling A, Ostapowicz J. Lysosomal hydrolases of dog kidney in superior mesenteric artery occlusion (SMAO) shock. EXPERIMENTAL PATHOLOGY 1983; 23:157-161. [PMID: 6683196 DOI: 10.1016/s0232-1513(83)80053-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In 6 dogs with superior mesenteric artery occlusion (SMAO) shock and in 6 healthy animals the total and free activity of lysosomal hydrolases (acid phosphatase, betaglucuronidase and cathepsins) in the whole homogenate, the lysosomal enriched subfraction and the supernatant of kidneys were estimated. Statistically significant differences between the two groups were not observed. These results indicate that in SMAO shock, the stability of kidney lysosomes is well preserved during observed period.
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Długosz J, Ostapowicz J, Brzozowski J, Triebling A, Laszewicz W. Lysosomal hydrolases of the dog liver and kidneys in declamptic shock after constriction of the superior mesenteric artery. MATERIA MEDICA POLONA. POLISH JOURNAL OF MEDICINE AND PHARMACY 1979; 11:100-6. [PMID: 513832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Religa Z, Sitkowski W, Brzozowski J. [Few remarks on univentricular heart in the light of an observed case]. POLSKI TYGODNIK LEKARSKI (WARSAW, POLAND : 1960) 1979; 34:1285-7. [PMID: 530879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Case Reports |
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Jankowski H, Goldie B, Brzozowski J, Bond D, Scarlett C, Skelding K, Weidenhofer J. Abstract B35: Differences in extracellular vesicle nucleic acid content show promise as prostate cancer biomarkers. Cancer Res 2016. [DOI: 10.1158/1538-7445.nonrna15-b35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Prostate cancer has one of the highest incidence rates of all cancers worldwide. Although 5-year survival rates are high, this is generally attributed to most prostate cancers either exhibiting a slow progression towards metastasis or being indolent. However current treatments for localized disease have devastating effects on quality of life and the biomarkers that are currently available are not accurate enough. This has resulted in many men with indolent disease being unnecessarily treated. Therefore, it is essential to identify new prognostic biomarkers that are accurate, sensitive and able to be tested for in non-invasive ways. Extracellular vesicles (EVs) have gained interest as a promising avenue for cancer biomarkers in recent years. EVs are small spherical shaped vesicles, which are secreted from their tissue of origin and contain high amounts of noncoding RNAs. EVs, from a panel of 20 prostate cell lines from normal, primary cancer or metastatic sites, were investigated by Affymetrix Human Transcriptome arrays (HTA 2.0). This enabled the identification of nucleic acids that contribute to the development of metastasis through comparison with EV and cellular function. EVs were collected from cell culture media devoid of supplements after 48 hours, by ultraconcentration. RNA was extracted with Trizol and evaluated using total RNA Agilent 2100 bioanalyzer chips. RNA was converted to labeled cDNA and hybridized to HTA 2.0 cassettes. Data was normalized using expression console and analyzed using transcriptome analysis console. Bioanalyzer results illustrated a unique RNA profile for each of the 20 cell lines. Preliminary analysis of nucleic acid content showed that the amount of mRNA, miRNA, snRNA, snoRNA, tRNA, and lncRNA packaged into EVs varies between cell lines further highlighting the differences observed with bioanalyzer profiles. Further several transcripts had significantly different abundance levels that discriminated between EVs released from cells of normal prostate, prostate cancer and metastatic origin, showing potential as biomarkers. Further analysis is ongoing to identify what mechanisms contribute to the differential packaging of nucleic acid into EVs in prostate cells and specific nucleic acid changes that could be used as novel biomarkers.
Citation Format: Helen Jankowski, Belinda Goldie, Joshua Brzozowski, Danielle Bond, Christopher Scarlett, Kathryn Skelding, Judith Weidenhofer. Differences in extracellular vesicle nucleic acid content show promise as prostate cancer biomarkers. [abstract]. In: Proceedings of the AACR Special Conference on Noncoding RNAs and Cancer: Mechanisms to Medicines ; 2015 Dec 4-7; Boston, MA. Philadelphia (PA): AACR; Cancer Res 2016;76(6 Suppl):Abstract nr B35.
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Bond D, Brzozowski J, Skelding K, Roselli S, Weidenhofer J. Use of tetraspanins CD151 and CD9 as biomarkers for breast cancer. BREAST CANCER MANAGEMENT 2014. [DOI: 10.2217/bmt.14.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Birgersson M, Chi M, Miller C, Brzozowski JS, Brown J, Schofield L, Taylor OG, Pearsall EA, Hewitt J, Gedye C, Lincz LF, Skelding KA. A Novel Role for Brain and Acute Leukemia Cytoplasmic (BAALC) in Human Breast Cancer Metastasis. Front Oncol 2021; 11:656120. [PMID: 33968759 PMCID: PMC8101327 DOI: 10.3389/fonc.2021.656120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/29/2021] [Indexed: 11/29/2022] Open
Abstract
Brain and Acute Leukemia, Cytoplasmic (BAALC) is a protein that controls leukemia cell proliferation, differentiation, and survival and is overexpressed in several cancer types. The gene is located in the chromosomal region 8q22.3, an area commonly amplified in breast cancer and associated with poor prognosis. However, the expression and potential role of BAALC in breast cancer has not widely been examined. This study investigates BAALC expression in human breast cancers with the aim of determining if it plays a role in the pathogenesis of the disease. BAALC protein expression was examined by immunohistochemistry in breast cancer, and matched lymph node and normal breast tissue samples. The effect of gene expression on overall survival (OS), disease-free and distant metastasis free survival (DMFS) was assessed in silico using the Kaplan-Meier Plotter (n=3,935), the TCGA invasive breast carcinoma (n=960) and GOBO (n=821) data sets. Functional effects of BAALC expression on breast cancer proliferation, migration and invasion were determined in vitro. We demonstrate herein that BAALC expression is progressively increased in primary and breast cancer metastases when compared to normal breast tissue. Increased BAALC mRNA is associated with a reduction in DMFS and disease-free survival, but not OS, in breast cancer patients, even when corrected for tumor grade. We show that overexpression of BAALC in MCF-7 breast cancer cells increases the proliferation, anchorage-independent growth, invasion, and migration capacity of these cells. Conversely, siRNA knockdown of BAALC expression in Hs578T breast cancer cells decreases proliferation, invasion and migration. We identify that this BAALC associated migration and invasion is mediated by focal adhesion kinase (FAK)-dependent signaling and is accompanied by an increase in matrix metalloproteinase (MMP)-9 but not MMP-2 activity in vitro. Our data demonstrate a novel function for BAALC in the control of breast cancer metastasis, offering a potential target for the generation of anti-cancer drugs to prevent breast cancer metastasis.
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Brzozowski J. [Epidemiology of venereal diseases in the light of our observations]. PRZEGLAD DERMATOLOGICZNY 1973; 60:37-40. [PMID: 4801842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Długosz JW, Triebling AT, Brzozowski J. The role of lysosomal alterations in the damage to the pancreas and liver in acute experimental pancreatitis in dogs. MATERIA MEDICA POLONA. POLISH JOURNAL OF MEDICINE AND PHARMACY 1993; 25:119-25. [PMID: 7520959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The role of lysosomal hydrolases in the pathogenesis of acute pancreatitis and secondary liver injury, as an important aspect of multisystem organ failure, remains unclear. The purpose of this study was to assess the lysosomal fragility in both organs in acute experimental pancreatitis (AEP) of graded severity in dogs. In 7 dogs, the moderate (M) and in 13 dogs severe (S) variant of bile--trypsin AEP--was induced; 6 dogs were in control group (C). The 24 h survival time was 6/7 and 6/13, respectively. After that time, the dogs were sacrificed and the lysosomal enriched subfraction (L) from both organs was isolated by ultracentrifugation. The total (T) and free (F) activities of beta-glucuronidase (beta G), cathepsins (Cs) and acid phosphatase (AcP) according to Gianetto and de Duve were assayed. The fractional free activity (% F/T) was adapted as and index of lysosomal stability. The %F/T of BG in the homogenate of the pancreas in AEP(S) was higher than that in AEP(M) (92% vs. 71%, p < 0.05, and vs. 37% in C, p < 0.005). The %F/T of Cs and AcP showed a similar pattern. The %F/T of beta G in L of the liver in AEP(S) was 38% vs. 29% in AEP(M), (p < 0.05), and vs. 20% in C (p < 0.05). In AEP in dogs the %F/T activities of lysosomal hydrolases in the pancreas and liver were increased, suggesting the labilization of lysosomal membranes in severe form of this disease. Our results support the pathogenic role of lysosomal hydrolases in the damage to the pancreas and liver in acute pancreatitis.
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Brzozowski J. [Occurrence of dermatoses in the course of diabetes mellitus]. PRZEGLAD DERMATOLOGICZNY 1975; 62:399-405. [PMID: 1144799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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English Abstract |
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Miedziński F, Dratwiński Z, Brzozowski J, Sarankiewicz B. [Nosologic situation of keratoacanthoma centrifugum]. DER HAUTARZT 1973; 24:120-3. [PMID: 4713263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Kaszewska-Jablonska I, Bardzik I, Brzozowski J. [Liver changes in porphyria cutanea tarda. Part II]. POLSKIE ARCHIWUM MEDYCYNY WEWNETRZNEJ 1976; 56:211-9. [PMID: 980919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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English Abstract |
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Gabryelewicz A, Długosz J, Brzozowski J, Musiatowicz B, Sidun-Kuryłowicz Z, Wereszczyńska U, Triebling A. Prostacyclin: effect on pancreatic lysosomes in acute experimental pancreatitis in dogs. THE MOUNT SINAI JOURNAL OF MEDICINE, NEW YORK 1983; 50:218-24. [PMID: 6353210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Dlugosz J, Gabryelewicz A, Andrzejewska A, Triebling A, Brzozowski J, Wereszczynska U. Prostacyclin (PGI2) stabilises hepatic lysosomes during acute experimental pancreatitis in dogs. ZEITSCHRIFT FUR EXPERIMENTELLE CHIRURGIE 1982; 15:210-8. [PMID: 6753374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In 15 mongrel dogs acute experimental pancreatitis (AEP) was induced by injection of bile and trypsin into the pancreatic duct. After 12 hrs in lysosomal enriched subfraction of the liver in untreated group (N = 5) relative free activity of cathepsins (Cs), acid phosphatase (AP) and beta-glucuronidase (beta G) increased to 50,62, and 53% respectively in comparison to the healthy dogs (N = 6) : 19,43 and 20%. In dogs with AEP treated with prostacyclin (PGI2) in the dose of 20 ng/kg X min for 12 hrs these activities of Cs, AP and beta G were lowered to 30,55 and 41% in comparison with the untreated group. In dogs with AEP (N = 5) additionally pretreated during 1 hr before the induction of AEP with the same rate of PGI2 i.v. infusion, the relative free activity of enzymes was similar to the treated group. After two hrs incubation of lysosomal enriched subfraction in acidic medium (pH = 5,0), the highest values of relative free activity were observed in untreated group, the difference being more pronounced in comparison with control group than before incubation. In those animals treated and pretreated with PGI2, postincubation activities were much lower than in untreated dogs. These results suggest the stabilising effect of PGI2 on hepatic lysosomes, damaged during the course of AEP in dogs.
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Jabłońska-Kaszewska I, Rynkiewicz H, Brzozowski J. [Usefulness of scintigraphy in the evaluation of hepatic changes in porphyria cutanea tarda]. POLSKI TYGODNIK LEKARSKI (WARSAW, POLAND : 1960) 1979; 34:481-4. [PMID: 441015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Kuszyńska-Cieślik G, Trenkner E, Brzozowski J. [Evaluation of Rivanol in the aspect of post-therapeutic complications]. POLSKI TYGODNIK LEKARSKI (WARSAW, POLAND : 1960) 1978; 33:183-6. [PMID: 652641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Chen Y, Roselli S, Panicker N, Brzozowski JS, Skerrett-Byrne DA, Murray HC, Verrills NM. Proteomic and phosphoproteomic characterisation of primary mouse embryonic fibroblasts. Proteomics 2024; 24:e2300267. [PMID: 37849217 DOI: 10.1002/pmic.202300267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/20/2023] [Accepted: 10/04/2023] [Indexed: 10/19/2023]
Abstract
Fibroblasts are the most common cell type in stroma and function in the support and repair of most tissues. Mouse embryonic fibroblasts (MEFs) are amenable to isolation and rapid growth in culture. MEFs are therefore widely used as a standard model for functional characterisation of gene knockouts, and can also be used in co-cultures, commonly to support embryonic stem cell cultures. To facilitate their use as a research tool, we have performed a comprehensive proteomic and phosphoproteomic characterisation of wild-type primary MEFs from C57BL/6 mice. EIF2/4 and MTOR signalling pathways were abundant in both the proteome and phosphoproteome, along with extracellular matrix (ECM) and cytoskeleton associated pathways. Consistent with this, kinase enrichment analysis identified activation of P38A, P90RSK, P70S6K, and MTOR. Cell surface markers and matrisome proteins were also annotated. Data are available via ProteomeXchange with identifier PXD043244. This provides a comprehensive catalogue of the wild-type MEF proteome and phosphoproteome which can be utilised by the field to guide future work.
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