Cancer and Inflammation: Novartis Foundation Symposium 256 by NOVARTIS


Persistent irritation predisposes to a few different types of melanoma and the host reaction to malignant illness indicates a number of parallels with irritation and wound therapeutic. The cells enthusiastic about irritation are detected in a number of universal cancers, including the inflammatory cytokines and individuals of the chemokine ligand/receptor systems.

Neutralization or deletion of the gene for a few inflammatory cytokines confers resistance to tumour induction and experimental metastasis. Over-expression of such cytokines in tumour cells might improve malignant strength. definite chemokines are inclined to subvert antitumour immunity by way of favouring improvement of useless style 2 responses. Tumour cells will even make the most of chemokine receptors in homing to lymph nodes and different organs. therefore, the cells, cytokines and chemokines present in tumours usually tend to give a contribution to tumour progress, development and immunosuppression than they're to mount an efficient host antitumour response.

This ebook attracts jointly contributions from a world team of scientists and clinicians from assorted disciplines, starting from epidemiology to immunology, phone biology, molecular oncology, molecular drugs and pharmacology to discuss those and similar matters. themes lined contain the epidemiological hyperlinks among melanoma and irritation, the parallels among irritation and melanoma, the position of irritation in melanoma, inflammatory genes as possibility elements for melanoma initiation and development, irritation and melanoma angiogenesis, and preventative and healing strategies.

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Foremost is the a priori unlikelihood that tumour cells contribute to their own destruction. Cancers are nearly pure Darwinian systems, and the selective pressures for uncontrolled cell growth are su⁄ciently great that a biologically ‘successful’ tumour will almost certainly not expend any energy that does not contribute to its growth, much less to its destruction. That being the case, what is the explanation for tumour cells’ secretion of chemokines? One possibility is that they directly contribute to tumour cell proliferation or aggressive behaviour in an autocrine fashion.

How do we resolve all this? Is there any circumstance under which we could predict which way MCP-1 will in£uence the tumour? Mantovani: I believe that under physiopathological conditions the prevailing function of CCL2/MCP-1 is the pro-tumour function. Tying together all the evidence, unless you over-express the gene and get over-recruitment, the physiological mechanisms of production and recruitment are pro-tumour.

However, through their expression of chemokine ligands and receptors, cancers have commandeered various aspects of this host defence system in order to enhance their growth. Although engineered over-expression of some tumour-derived chemokines can stimulate host antitumour responses, this is unlikely to be the reason that tumour cells express them. Rather, a growing body of clinical and laboratory evidence indicates that cancer cells may secrete chemokines in order to attract host cells that supply the tumours with growth and angiogenic factors.

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