Surfing the Third Wave: Experiential Reflections on New Working Practices

Systemic Practice and Action Research - This paper deals with issues and presents changes in practices relating to the new working as realized in the developing e-working world. The paper begins by...     

Mesenchymal stem cells within tumour stroma promote breast cancer metastasis

Mesenchymal stem cells have been recently described to localize to breast carcinomas, where they integrate into the tumour-associated stroma. However, the involvement of mesenchymal stem cells (or their derivatives) in tumour pathophysiology has not been addressed. Here, we demonstrate that bone-marrow-derived human mesenchymal stem cells, when mixed with otherwise weakly metastatic human breast carcinoma cells, cause the cancer cells to increase their metastatic potency greatly when this cell mixture is introduced into a subcutaneous site and allowed to form a tumour xenograft. The breast cancer cells stimulate de novo secretion of the chemokine CCL5 (also called RANTES) from mesenchymal stem cells, which then acts in a paracrine fashion on the cancer cells to enhance their motility, invasion and metastasis. This enhanced metastatic ability is reversible and is dependent on CCL5 signalling through the chemokine receptor CCR5. Collectively, these data demonstrate that the tumour microenvironment facilitates metastatic spread by eliciting reversible changes in the phenotype of cancer cells.     

First Pleistocene jumping mouse ( Zapus , Zapodinae, Rodentia) from Utah

Two of the Little Dell Dam fossil localities produced the 1st Pleistocene records of the jumping mouse Zapus from Utah. We describe these teeth in detail and compare their morphology with both extinct and extant jumping mouse taxa. Although it is not possible to confidently assign these specimens to a particular species, the Little Dell Dam fossils are clearly distinct from the only living jumping mouse ( Zapus princeps ) currently known from Utah. The paracone is attached to the rest of the occlusal surface of the upper 1st and 2nd molars in modern Z. princeps from Utah; the paracone is isolated in the molars from Little Dell Dam. The fossils from Little Dell Dam are the 1st reported records of Pleistocene Zapus west of the Rocky Mountains.     

Mutations in the gene encoding the PML nuclear body protein Sp110 are associated with immunodeficiency and hepatic veno-occlusive disease

We describe mutations in the PML nuclear body protein Sp110 in the syndrome veno-occlusive disease with immunodeficiency, an autosomal recessive disorder of severe hypogammaglobulinemia, combined T and B cell immunodeficiency, absent lymph node germinal centers, absent tissue plasma cells and hepatic veno-occlusive disease. This is the first report of the involvement of a nuclear body protein in a human primary immunodeficiency and of high-penetrance genetic mutations in hepatic veno-occlusive disease.     

Learning with participatory monitoring and evaluation in Dir district,northwest frontier province,Pakistan

This paper is concerned with the development of a monitoring and evaluation system for the second phase of a United Nations Drug Control Programme (UNDCP) in Pakistan and the manner in which participatory structures are developed and built on in a complex development context. Initially the paper introduces the context. The project is concerned with rural development issues as part of a structured programme to substitute opium poppy growing with a range of agricultural and social innovations. During the first phase of the project (up to 1993) the main focus of attention for the project was measured in terms of physical progress with road building, electricity supply, irrigation works and concentration on improved agricultural practices. Phase II has set out to build on this, most specifically in terms of gaining the greater participation of local people in the project activity. The paper describes the monitoring and evaluation (M&E) structure for the project and notes that it is intended that M&E further encourage participation and beneficiary analysis (analysis of project benefits by those who are intended to derive most from the project outputs). One of the primary means set out for achieving this was by inducing the professional staff working in the project to adopt new mind sets, adjusting their focus from being technical experts supplying undoubted technical improvements to being co-operative partners, bringing ideas to the area but equally being willing to work through these ideas and their implications and learn from the communities. The process for the development of the monitoring system is described, and the methodology ‘TeamUp’ discussed. Links are made to related areas of study—most specifically the literature of Rapid and Participatory Rural Development (RRA and PRA). Finally, the paper discusses the results of the research to date and the likely extension of the ideas to other projects.     

Book Review: Rational Analysis for a Problematic World Revisited: Problem Structuring Methods for Complexity,Uncertainty, and Conflict. Jonathan Rosenhead and John Mingers. Wiley,Chichester, United Kingdom. 2001, 365 pp., Chaps. 15, £22.50 (Amazon)

Systemic Practice and Action Research -     

A cryptic intermediate in the evolution of chameleon tongue projection

Summary An incipient form of tongue projection occurs inPhrynocephalus helioscopus, a generalized agamid lizard. We argue that this condition represents a functional intermediate between typical lingual prehension and chamaeleontid tongue projection, and that tongue projection evolved in chameleons by augmentation of ancestral mechanisms still operating in related, generalized lizards.