Comparative Gene Expression Profiling of Adams, Mmps, Timps, EMMPRIN, EGF-R and VEGFA in Low Grade Meningioma
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INTERNATIONAL JOURNAL OF ONCOLOGY 49: 2309-2318, 2016 Comparative gene expression profiling of ADAMs, MMPs, TIMPs, EMMPRIN, EGF-R and VEGFA in low grade meningioma HARCHARAN K. ROOPRAI1, ANDREW J. MARTIN2, ANDREW KING3, USHA D. APPADU4, HUW JONES4, RICHARD P. SELWAY1, RICHARD W. GULLAN1 and GEOFFREY J. PILKINGTON5 1Department of Neurosurgery, King's College Hospital, London SE5 9RS; 2Department of Neurosurgery, St. George's Hospital, London SW17 0QT; 3Department of Clinical Neuropathology, King's College Hospital, London SE5 9RS; 4School of Science and Technology, Middlesex University, London NW4 4BT; 5School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth PO1 2DT, UK Received April 17, 2016; Accepted June 6, 2016 DOI: 10.3892/ijo.2016.3739 Abstract. MMPs (matrix metalloproteinases), ADAMs (a Introduction disintegrin and metalloproteinase) and TIMPs (tissue inhibi- tors of metalloproteinases) are implicated in invasion and Meningiomas are tumours of neoplastic arachnoid cap cells angiogenesis: both are tissue remodeling processes involving which can arise from the dura at any site. This is, however, regulated proteolysis of the extracellular matrix, growth factors most commonly the skull vault, from the skull base and at sites and their receptors. The expression of these three groups and of dural reflections, whereas those which arise from the spine their correlations with clinical behaviour has been reported in account for only 10% of meningiomas. In addition, they are gliomas but a similar comprehensive study in meningiomas the most frequently encountered benign, non-glial, neoplasms is lacking. In this study, we aimed to evaluate the patterns of within the skull, accounting for nearly a quarter of all primary expression of 23 MMPs, 4 TIMPs, 8 ADAMs, selective growth intracranial tumours (1) and have an estimated annual inci- factors and their receptors in 17 benign meningiomas using dence of 2-7 per 100,000 women and 1-5 per 100,000 men (2). a quantitative real-time polymerase chain reaction (qPCR). Meningiomas are typically benign tumours but have a broad Results indicated very high gene expression of 13 proteases, spectrum of clinical characteristics and histologically distinct inhibitors and growth factors studied: MMP2 and MMP14, subsets which are associated with high risk of recurrence, TIMP-1, -2 and -3, ADAM9, 10, 12, 15 and 17, EGF-R, even after complete resection. According to the WHO clas- EMMPRIN and VEGF-A, in almost every meningioma. sification, benign meningiomas (Grade I) have a low risk of Expression pattern analysis showed several positive correla- recurrence and aggressive growth with 22 subtypes, including tions between MMPs, ADAMs, TIMPs and growth factors. meningothelial, fibroblastic, transitional and psammomatous Furthermore, our findings suggest that expression of MMP14, meningiomas. Atypical meningiomas (Grade II) are more ADAM9, 10, 12, 15 and 17, TIMP-2, EGF-R and EMMPRIN likely to recur whereas anaplastic meningiomas (Grade III) reflects histological subtype of meningioma such that fibro- have the greatest likelihood of recurrence and/or have more blastic subtype had the highest mRNA expression, transitional aggressive behaviour (3). subtype was intermediate and meningothelial type had the Although histologically benign meningiomas differ in their lowest expression. In conclusion, this is the first comprehen- patterns of invasion from atypical meningiomas, they can still sive study characterizing gene expression of 8 ADAMs in invade the dura, dural sinuses, skull and extracranial compart- meningiomas. These neoplasms, although by histological ments because of their ability to extend into mesenchymal definition benign, have invasive potential. Taken together, the tissues. They are not, however, considered to be atypical or selected elevated gene expression pattern may serve to identify malignant. In contrast, brain invasion is associated with recur- targets for therapeutic intervention or indicators of biological rence and mortality rates similar to atypical meningiomas, even progression and recurrence. if the neoplasm appears to be otherwise completely benign (4). A critical step of tumour progression and recurrence is the infiltrative invasion into the contiguous tissue. Metallo proteinases (MMPs) are a family of 23 structurally related, zinc-dependent endopeptidases in man. For many years, some Correspondence to: Dr Harcharan Kaur (Bali) Rooprai, Depart- ment of Neurosurgery, King's College Hospital NHS Foundation of the MMPs have been widely implicated as mediators of Trust, Denmark Hill, London SE5 9RS, UK invasion and angiogenesis with a role in degradation of the E-mail: [email protected] extracellular matrix (ECM). It is now evident that the func- tions of MMPs are much more complex than was initially Key words: ADAMs, growth factors, matrix metalloproteases, gene thought since they also have other roles such as regulation of expression, meningiomas cell adhesion (5), and control of apoptosis via release of death or survival factors. MMPs are also known to regulate the 2310 ROOPRAI et al: GENE EXPRESSION OF ADAMS, TIMPS AND GROWTH FACTORS IN MENINGIOMAS bioavailability and/or activity of growth factors by mediating Ethical permission (LREC No 00-173), from the Department receptor turnover or by cleaving matrix proteins associated of Neurosurgery, King's College Hospital, London in 2000 and with growth factors. EMMPRIN (extracellular matrix metal- 2001. The tumour was diagnosed, according to the World Health loproteinase inducer), which is also known as CD147, basigin Organisation criteria by a neuropathologist. Cells were cultured or M6, is thought to induce tumour invasion by activating as monolayers in small plastic culture flasks (Marathon) at production of various MMPs. The ability of MMP-9 to trigger 37˚C, 5% CO2 in a standard humidified incubator. Cells were the release of vascular endothelial growth factor (VEGF) routinely maintained in Dulbecco's modified Eagle's medium which regulates angiogenesis and vascular permeability is (DMEM) supplemented with antibiotics/antimycotic at the also well documented (6). Additionally, the epidermal growth final concentration of 100 IU penicillin, 100 µg amphotericin factor receptor (EGFR) family of membrane-bound receptor per ml and 10% fetal calf serum (FCS; Sigma-Aldrich). tyrosine kinases which comprise 4 structurally related recep- The remaining five samples used were frozen biopsies tors, (EGFR, HER2, HER3/ErbB3 and HER4/ErbB4), plays (numbers 13-17, with a prefix, BT). These were collected an important role in tumour invasion (7). between 1991 and 1997 and kindly provided by Dr Peter The expression of some MMPs has been well studied in Forsyth, University of Calgary, Canada. Tissue was collected, gliomas (8-12) and meningiomas (13-19) particularly in rela- under local Ethical permission, in the operating theatre imme- tion to invasion or recurrence. Closely related to the MMPs is diately after removal and snap frozen in liquid nitrogen. The the ADAM (a disintegrin and metalloproteinase) family which meningiomas were classified and graded by a neuropathologist has also been implicated in cancer, particularly via ADAM- at this institution. Samples, having been previously frozen in mediated activation of EGFR signalling (20). ADAM8 and liquid nitrogen, were homogenized in RNAzol, and frozen at ADAM19 have also been reported to be overexpressed in 20˚C until the RNA was isolated. Dr Robert Nuttall carried various brain tumours (21) as well as ADAM10 in gliomas (22) out the qPCR at the School of Biological Sciences, University and have been implicated in local invasion. of East Anglia, Norwich. RECK (reversion-inducing cysteine-rich protein with kazal motifs) is a tumour and metastatic suppressor protein which is RNA isolation and reverse transcription. Total RNA was a negative regulator of MMPs and has been implicated in the isolated from cell culture and tissue lysates according to the regulation of both tumour invasion and angiogenesis. The four instructions provided with the RNAzol. RNA was resuspended members of the tissue inhibitors of matrix metalloproteinases in diethyl pyrocarbonate-treated (Sigma-Aldrich) water. The (TIMPs) family which were previously thought to be endog- concentrations were then determined by spectrophotometry enous inhibitors of MMPs alone are now known to inhibit using a GeneQuant pro RNA/DNA calculator (Amersham several ADAMs and to be involved independently in modula- Pharmacia Biotech, Little Chalfont, UK). One microgram tion of various biological activities including cell proliferation, of total RNA was reverse transcribed using 2 µg random migration, invasion, angiogenesis and apoptosis (23). hexamers (Amersham Pharmacia Biotech) and SuperScript Although there are several reports of elevated levels of II reverse transcriptase (Life Technologies, Paisley, UK) some ADAMs in gliomas, there is a lack of studies for the according to the supplier's instructions. Complementary DNA co-expression of these with MMPs, TIMPs, various growth copy (cDNA) was stored at 20˚C until required for the poly- factors and their receptors in benign meningiomas. The aim merase chain reaction (PCR). of this study was to characterize RNA expression of the MMP family, 4 TIMPs, RECK as well as 8 ADAMs and selective Quantitative real-time PCR. Sequences for 100 nM probes and growth factors and/or receptors implicated as modulators of 200 nM primers used in the present study for MMPs, TIMPs, invasion