Leibovici J, Itzhaki O, Kaptzan T, Skutelsky E, Sinai J, Michowitz M, Asfur R, Siegal A, Huszar M, Schiby G. Designing ageing conditions in tumour microenvironment-a new possible modality for cancer treatment.
Mech Ageing Dev 2008;
130:76-85. [PMID:
18455752 DOI:
10.1016/j.mad.2008.03.004]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2008] [Revised: 03/05/2008] [Accepted: 03/12/2008] [Indexed: 12/16/2022]
Abstract
While tumour incidence is known to augment with age, paradoxically tumour growth and metastasis were often found to proceed at a slower rate at late ages. This age-related biological behaviour of tumours actually imposes a differential therapeutic approach to the old cancer patient. Several mechanisms of the age-related reduced tumour progression have been demonstrated: decreased tumour cell proliferation, increased apoptotic cell death, decreased angiogenesis and anti-tumoural immune response changes. We postulated that it might be possible to design age-adjusted treatment modalities based on the mechanisms responsible for the reduced tumour progression rate in the aged. Based on these mechanisms, we compared the effect of different treatments (apoptosis-inducing agents, Hydrocortisone and Adriamycin, anti-angiogenic agent, TNP-470, and immunomodulators-Levamisole and BCG) on two experimental tumours (B16 melanoma and AKR lymphoma) growing in young and old mice. Most treatments showed, in both tumours, a higher inhibitory effect on tumours growing in old mice than on those developing in young ones, to our knowledge, a feature not described before for anti-tumoural agents. We suggest that designing ageing conditions in tumours of young patients might possibly alleviate neoplastic aggressiveness in these patients as well.
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