Connective tissue growth factor [CTGF]/CCN2 stimulates mesangial cell migration through integrated dissolution of focal adhesion complexes and activation of cell polarization

Connective tissue growth factor [CTGF]/CCN2 is a prototypic member of the CCN family of regulatory proteins. CTGF expression is up-regulated in a number of fibrotic diseases, including diabetic nephropathy, where it is believed to act as a downstream mediator of TGF-beta function; however, the exact mechanisms whereby CTGF mediates its effects remain unclear. Here, we describe the role of CTGF in cell migration and actin disassembly in human mesangial cells, a primary target in the development of renal glomerulosclerosis. The addition of CTGF to primary mesangial cells induced cell migration and cytoskeletal rearrangement but had no effect on cell proliferation. Cytoskeletal rearrangement was associated with a loss of focal adhesions, involving tyrosine dephosphorylation of focal adhesion kinase and paxillin, increased activity of the protein tyrosine phosphatase SHP-2, with a concomitant decrease in RhoA and Rac1 activity. Conversely, Cdc42 activity was increased by CTGF. These functional responses were associated with the phosphorylation and translocation of protein kinase C-zeta to the leading edge of migrating cells. Inhibition of CTGF-induced protein kinase C-zeta activity with a myristolated PKC-zeta inhibitor prevented cell migration. Moreover, transient transfection of human mesangial cells with a PKC-zeta kinase inactive mutant (dominant negative) expression vector also led to a decrease in CTGF-induced migration compared with wild-type. Furthermore, CTGF stimulated phosphorylation and activation of GSK-3beta. These data highlight for the first time an integrated mechanism whereby CTGF regulates cell migration through facilitative actin cytoskeleton disassembly, which is mediated by dephosphorylation of focal adhesion kinase and paxillin, loss of RhoA activity, activation of Cdc42, and phosphorylation of PKC-zeta and GSK-3beta. These changes indicate that the initial stages of CTGF mediated mesangial cell migration are similar to those involved in the process of cell polarization. These findings begin to shed mechanistic light on the renal diabetic milieu, where increased CTGF expression in the glomerulus contributes to cellular dysfunction.

The spirit of palliative practice:A qualitative inquiry into the spiritual journey of palliative care physicians

Objective: Much is known about the important role of spirituality in the delivery of multidimensional care for patients at the end of life. Establishing a strong physician-patient relationship in a palliative context requires physicians to have the self-awareness essential to establishing shared meaning and relationships with their patients. However, little is known about this phenomenon and therefore, this study seeks a greater understanding of physician spirituality and how caring for the terminally ill influences this inner aspect. Method: A qualitative descriptive study was used involving face-to-face interviews with six practicing palliative care physicians. Results: Conceptualized as a separate entity from religion, spirituality was described by participants as a notion relating to meaning, personal discovery, self-reflection, support, connectedness, and guidance. Spirituality and the delivery of care for the terminally ill appeared to be interrelated in a dynamic relationship where a physician's spiritual growth occurred as a result of patient interaction and that spiritual growth, in turn, was essential for providing compassionate care for the palliative patient. Spirituality also served as an influential force for physicians to engage in self-care practices. Significance of results: With spirituality as a pervasive force not only in the lives of palliative care patients, but also in those of healthcare providers, it may prove to be beneficial to use this information to guide future practice in training and education for palliative physicians in both the spiritual care of patients and in practitioner self care. Copyright © Cambridge University Press 2010.

Management of myelofibrosis:a survey of current practice in the United Kingdom

To investigate the experience of clinicians in the management of patients with myelofibrosis, current treatment options and their utility.

1987-1991. Joint Archaeological Project of the National Museum of Malta and the Universities of Bristol, Cambridge and Malta.

Malone, C.A.T. and S.K.F. Stoddart, Five Year Statement.1991: Cambridge University.

Risk and Reward: Safer systems of work practice.

To develop and implement a risk assessment process for all unlicenced medicinal products in use within the Belfast City Hospital.
Over half 65% of the unlicenced medicinal products currently in use were rated low or minor risk and therefore required no recording upon supply.
This has greatly improved the way unlicensed medicines are prescribed, procured, supplied and administered within the Belfast City Hospital.

Are early life factors considered when managing respiratory disease?:A British Thoracic Society survey of current practice

We hypothesised that early life events are not routinely considered by most respiratory specialists.