Zusammenfassung
Adipositas ist mit einem erhöhten Risiko für Kolonkarzinome assoziiert. Das Fettgewebe
sezerniert eine Reihe von biofunktionellen Faktoren, sogenannte Adipokine. Diese führen
unter bestimmten Bedingungen zu einem Wachstum von HT29-Zellen. Z. B. wurde für Leptin
eine proliferationsfördernde Wirkung beschrieben, die jedoch in einem Modell mit der
Verwendung von Fettzellüberständen nicht bestätigt werden konnte. Vermutlich sezernieren
Fettgewebszellen sowohl proliferationsfördernde als auch proliferationshemmende Substanzen.
Diverse sekundäre Pflanzenstoffe scheinen proliferationshemmendes und damit tumorprotektives
Potenzial zu besitzen.
Abstract
Adiposity is associated with an increased risk for colon cancer. Adipose tissue is
secreting a variety of factors, the so-called adipokines. Under particular conditions
adipokines promote the growth of HT29 cells. Leptin for example has a proliferating
effect which could not be confirmed in experiments using supernatants of fat cells.
It is assumed that cells from adipose tissue secrete substances which display promoting
or inhibiting characteristics. A variety of secondary plant metabolites might inhibit
proliferation and hence could have tumour-protective potential.
Schlüsselwörter
Adipositas - Kolonkarzinom - Leptin - HT29-Zellen - sekundäre Pflanzenstoffe
Key words
adiposity - colon cancer - leptin - HT29 cells - secondary plant metabolites
Literatur
1
Gunter M J, Leitzmann M F.
Obesity and colorectal cancer: epidemiology, mechanisms and candidate genes.
J Nutr Biochem.
2006;
17 (3)
145-156
2
Hauner H.
The new concept of adipose tissue function.
Physiol Behav.
2004;
83 (4)
653-658
3
Ogunwobi O O, Beales I L.
The anti-apoptotic and growth stimulatory actions of leptin in human colon cancer
cells involves activation of JNK mitogen activated protein kinase, JAK2 and PI3 kinase/Akt.
Int J Colorectal Dis.
2006;
22
401-409
4
Ogunwobi O O, Beales I L.
Adiponectin stimulates proliferation and cytokine secretion in colonic epithelial
cells.
Regul Pept.
2006;
134 (2 - 3)
105-113
5
Skurk T, Herder C, Kraft I, Muller-Scholze S, Hauner H, Kolb H.
Production and release of macrophage migration inhibitory factor from human adipocytes.
Endocrinology.
2005;
146 (3)
1006-1011
6
Skurk T, Alberti-Huber C, Herder C, Hauner H.
Relationship between adipocyte size and adipokine expression and secretion.
J Clin Endocrinol Metab.
2007;
92 (3)
1023-1033
7
Riboli E, Norat T.
Epidemiologic evidence of the protective effect of fruit and vegetables on cancer
risk.
Am J Clin Nutr.
2003;
78, 3 Suppl
559S-569S
8
Coates E M, Popa G, Gill C I, McCann M J, McDougall G J, Stewart D. et al .
Colon-available raspberry polyphenols exhibit anti-cancer effects on in vitro models
of colon cancer.
J Carcinog.
2007;
6
4
9
Qu H, Madl R L, Takemoto D J, Baybutt R C, Wang W.
Lignans are involved in the antitumor activity of wheat bran in colon cancer SW480
cells.
J Nutr.
2005;
135 (3)
598-602
10
Reddy B S.
Prevention of colon carcinogenesis by components of dietary fiber.
Anticancer Res.
1999;
19 (5A)
3681-3683
11
Kumar N, Shibata D, Helm J, Coppola D, Malafa M.
Green tea polyphenols in the prevention of colon cancer.
Front Biosci.
2007;
12
2309-2315
12
Wakai K, Hirose K, Matsuo K, Ito H, Kuriki K, Suzuki T. et al .
Dietary risk factors for colon and rectal cancers: a comparative case-control study.
J Epidemiol.
2006;
16 (3)
125-135
Dr. Thomas Skurk
Else-Kröner-Fresenius-Zentrum für Ernährungsmedizin
Hochfeldweg 1
83530 Freising-Weihenstephan
Telefon: 08161/712001
Fax: 08161/712097
eMail: ernaehrungsmedizin@wzw.tum.de