title: Dietary fish oil did not prevent sleep deprived rats from a reduction in adipose tissue adiponectin gene expression.
abstract: Sleep deprivation in humans has been related to weight gain and consequently, increased risk for insulin resistance. In contrast, there is a significant loss of weight in sleep deprived rats suggesting a state of insulin resistance without obesity interference. Thus, we aimed to assess the effects of a rich fish oil dietetic intervention on glucose tolerance, serum insulin and adiponectin, and adipose tissue gene expression of adiponectin and TNF-alpha of paradoxically sleep deprived (PSD) rats. The study was performed in thirty day-old male Wistar randomly assigned into two groups: rats fed with control diet (soybean oil as source of fat) and rats fed with a fish oil rich diet. After 45 days of treatment, the animals were submitted to PSD or maintained as home cage control group for 96 h. Body weight and food intake were carefully monitored in all groups. At the end of PSD period, a glucose tolerance test was performed and the total blood and adipose tissues were collected. Serum insulin and adiponectin were analyzed. Adipose tissues were used for RT-PCR to estimate the gene expression of adiponectin and TNF-alpha. Results showed that although fish oil diet did not exert any effect upon these measurements, PSD induced a reduction in adiponectin gene expression of retroperitoneal adipose tissues, with no change in serum adiponectin concentration or in adiponectin and TNF-alpha gene expression of epididymal adipose tissue. Thus, the stress induced by sleep deprivation lead to a desbalance of adiponectin gene expression.
authors.affiliation: Department of Physiology, Federal University of São Paulo, São Paulo, Brazil. anamattos9@hotmail.com
authors.forename: Ana Barbosa Marcondes
authors.initials: AB
authors.lastname: de Mattos
authors.forename: Mônica Jordão S
authors.initials: MJ
authors.lastname: Pinto
authors.forename: Cristiane
authors.initials: C
authors.lastname: Oliveira
authors.forename: Carolina
authors.initials: C
authors.lastname: Biz
authors.forename: Eliane Beraldi
authors.initials: EB
authors.lastname: Ribeiro
authors.forename: Claudia Maria Oller
authors.initials: CM
authors.lastname: do Nascimento
authors.forename: Monica Levy
authors.initials: ML
authors.lastname: Andersen
authors.forename: Sergio
authors.initials: S
authors.lastname: Tufik
authors.forename: Lila Missae
authors.initials: LM
authors.lastname: Oyama
mesh_terms: D052242:Adiponectin / Q000097:blood / Q000235:genetics*; D000273:Adipose Tissue / Q000187:drug effects* / Q000378:metabolism; D000818:Animals; D001786:Blood Glucose / Q000187:drug effects; D001835:Body Weight / Q000187:drug effects; D004042:Dietary Fats, Unsaturated / Q000494:pharmacology*; D004435:Eating / Q000187:drug effects; D005395:Fish Oils / Q000494:pharmacology*; D015870:Gene Expression / Q000187:drug effects*; D005951:Glucose Tolerance Test; D007328:Insulin / Q000097:blood; D008297:Male; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012892:Sleep Deprivation / Q000503:physiopathology*; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics
chemical_list: D052242:Adiponectin; D001786:Blood Glucose; D004042:Dietary Fats, Unsaturated; D005395:Fish Oils; D007328:Insulin; D014409:Tumor Necrosis Factor-alpha