title: Circulating leptin and inflammatory response in esophageal cancer, esophageal cancer-related cachexia-anorexia syndrome (CAS) and non-malignant CAS of the alimentary tract.
abstract: We investigated the association between esophageal cancer and cachexia-anorexia syndrome (CAS) of the alimentary tract and leptin, an adipocytokine crucial for body weight regulation, a modulator of inflammatory/immune response, implication of which in cancer and CAS development remains debatable. Circulating leptin was measured in 135 esophageal cancer patients (51 non-cachectic and 84 cachectic) and 83 controls (63 non-cachectic and 20 cachectic) and referred to cancer stage, CAS, and inflammatory and nutritional indices. Leptin was down-regulated in cancer patients and cachectic controls as compared to non-cachectic controls, with more pronounced hypoleptinemia in advanced cancers. Leptin correlated directly with BMI, TNF-alpha, albumin, and hemoglobin and indirectly with IL-6, IL-8, and hsCRP. The correlations, except for hsCRP, were more pronounced in females. BMI alone (females) and BMI and hsCRP (males) were independent predictors of leptin explaining over 60% of its variability. Following adjustment for BMI and gender, cancer-related CAS but not cancer itself negatively affected leptin. Leptin and BMI were independently associated with cancer-related and non-malignant CAS with diagnostic accuracy of 93% in identifying subjects with CAS. Pro-inflammatory, angiogenic and mitogenic properties of leptin do not seem to be important for esophageal cancer development but hypoleptinemia, independently from co-occurring reduction of adiposity, appears to be strongly associated with esophageal cancer-related CAS and non-malignant CAS of the alimentary tract.
authors.affiliation: Department of Gastrointestinal and General Surgery, Wroclaw Medical University, Wroclaw, Poland. ddiakow@chir.am.wroc.pl
authors.forename: Dorota
authors.initials: D
authors.lastname: Diakowska
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Krzystek-Korpacka
authors.forename: Krystyna
authors.initials: K
authors.lastname: Markocka-Maczka
authors.forename: Witold
authors.initials: W
authors.lastname: Diakowski
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Matusiewicz
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Grabowski
mesh_terms: D000230:Adenocarcinoma / Q000097:blood; D000855:Anorexia / Q000097:blood*; D015992:Body Mass Index; D002097:C-Reactive Protein / Q000378:metabolism; D002100:Cachexia / Q000097:blood*; D002294:Carcinoma, Squamous Cell / Q000097:blood; D015536:Down-Regulation; D004938:Esophageal Neoplasms / Q000097:blood*; D005260:Female; D041981:Gastrointestinal Tract; D006454:Hemoglobins / Q000378:metabolism; D006801:Humans; D007249:Inflammation / Q000097:blood / Q000209:etiology; D015850:Interleukin-6 / Q000097:blood; D016209:Interleukin-8 / Q000097:blood; D020738:Leptin / Q000097:blood*; D008297:Male; D012709:Serum Albumin / Q000378:metabolism; D013577:Syndrome; D014409:Tumor Necrosis Factor-alpha / Q000097:blood
chemical_list: D006454:Hemoglobins; D015850:Interleukin-6; D016209:Interleukin-8; D020738:Leptin; D012709:Serum Albumin; D014409:Tumor Necrosis Factor-alpha; D002097:C-Reactive Protein