title: Leptin alterations in the course of sepsis in humans.
abstract: Neuroendocrine response to sepsis may be divided into acute and prolonged phase. As leptin is implicated in the stress response, leptin's profile during both phases, and the possible relationships between leptin and the neuroendocrine response to sepsis were investigated. Thirty adult patients with sepsis in an intensive care unit were studied. Blood samples were collected at the acute and the prolonged phases. In acute sepsis, leptin levels were higher in patients than in controls (10.2 +/- 2.5 vs. 4.1 +/- 1.2 ng/ml, p =0.01) and correlated positively with insulin levels and insulin resistance. A decline in leptin levels was found during prolonged sepsis (from 10.2 +/- 2.5 to 6.2 +/- 1.7 ng/ml, p=0.001), which was not related to survival (p=0.913). At the onset of sepsis, leptin levels increased in correlation with insulin and insulin resistance, possibly indicating a cause-effect relationship. However, the decline in leptin levels during the prolonged phase of sepsis was not related either to survival or to metabolic and hormonal changes.
authors.affiliation: Department of Endocrinology, Diabetes and Metabolism, University of Athens, Evangelismos Hospital, Athens, Greece. mtzanel@med.uoa.gr
authors.forename: M
authors.initials: M
authors.lastname: Tzanela
authors.forename: S E
authors.initials: SE
authors.lastname: Orfanos
authors.forename: M
authors.initials: M
authors.lastname: Tsirantonaki
authors.forename: A
authors.initials: A
authors.lastname: Kotanidou
authors.forename: Ch
authors.initials: Ch
authors.lastname: Sotiropoulou
authors.forename: M
authors.initials: M
authors.lastname: Christophoraki
authors.forename: D
authors.initials: D
authors.lastname: Vassiliadi
authors.forename: N C
authors.initials: NC
authors.lastname: Thalassinos
authors.forename: Ch
authors.initials: Ch
authors.lastname: Roussos
mesh_terms: D000328:Adult; D001681:Biological Assay; D001786:Blood Glucose / Q000032:analysis; D016022:Case-Control Studies; D016638:Critical Illness; D004750:Enteral Nutrition; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D007328:Insulin / Q000097:blood; D007333:Insulin Resistance; D007362:Intensive Care Units; D020738:Leptin / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010288:Parenteral Nutrition; D012720:Severity of Illness Index; D012727:Sex Characteristics; D017741:Survivors; D018746:Systemic Inflammatory Response Syndrome / Q000097:blood* / Q000150:complications / Q000401:mortality*; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D001786:Blood Glucose; D007328:Insulin; D020738:Leptin; D014284:Triiodothyronine; D013972:Thyrotropin; D013974:Thyroxine; D006854:Hydrocortisone