Articles Related to Ghrelin
Leptin Receptor Gene Variant Rs1137101 and Ghrelin Gene Variant Rs696217 are Associated with Body Mass Index in Brazilian Population: A Case-Control Study
Introduction: Obesity is a multifactorial condition influenced by environment and genetic factors. Controlling appetite
and satiety involves complex interactions between the hypothalamus, which is responsible for homeostasis regulation
energy, and hormones that regulate appetite including leptin and ghrelin. Leptin plays an important role in the regulation
of food intake and energy expenditure, generating an increase in energy burning and decreasing food intake. And ghrelin
is directly involved in the regulation of short-term energy balance.
Objectives: To verify frequency, biochemical profile and Body Mass Index (BMI) variations according to SNPs in LEPR
and GHRL gene.
Subjects and Methods: 163 both genders subjects were classified into Study Group (SG): 103 subjects with obesity; Control Group (CG): 60 non-obese. Blood samples were collected to perform DNA extraction and biochemical profile analysis. Statistical significance was established at p < 0.05.
Results: The genotype and allele frequency were similar between groups for both polymorphisms. The _/A genotype of
the GHRL rs696217 polymorphism was associated to increased BMI in SG compared CG (p = 0.003) and increased triglycerides (TG) and very low density lipoprotein (VLDLc) values in CG (p < 0, 05). The _/A genotype was also associated
with increased fasting glucose compared to CC genotype only in CG (p = 0.031). Considering the LEPR rs1137101 polymorphism, AA genotype subjects presented higher BMI compared to _/G genotype subjects (p = 0.024). No difference
between biochemical profile variables related to LEPR rs1137101 polymorphism was found.
Conclusion: AA genotypes of the LEPR rs1137101 polymorphism and _/A of the GHRL rs696217 polymorphism suggest
being risk factors for BMI and the latter is associated with fasting glucose, VLDLc and TG variation.
Gingival Stimulation: An Important Metabolic Regulator?
This study aimed to determine whether a relationship exists between gingival stimulation and the levels of leptin, ghrelin, insulin and glucose, which are important regulators of energy homeostasis. Blood samples for ghrelin, leptin, glucose and insulin were taken from 15 male volunteers (mean age 25.5±2.3 years; mean body mass index 24.4±2.79 kg/m2), who did not brush their teeth for one day, after a 12 h-long overnight fasting and before standard breakfast (0 min) and thereafter at 30, 60, 120 and 180 min after breakfast. After toothbrushing after dinner and after a 12 h-long overnight fasting, blood samples were taken again before standard breakfast (0 min) and then after at the same time points following tooth brushing.A significant reduction was found in the leptin levels measured at 0, 30, 60, 120 and 180 min after tooth brushing (p < 0.005). The ghrelin levels also declined at these time points but were significant at 0, 30 and 120 min (p < 0.05). Despite the reduced insulin levels at 120 and 180 min after tooth brushing (p < 0.05), no significant change was observed in the glucose levels.
Immunohistochemical Localization of Ghrelin and IGF-I (Insulin-Like Growth Factor-I) in the Liver and Kidney Tissues of Melatonin-Treated Rats
This study was conducted to investigate the immunohistochemical localization of ghrelin and IGF-I in the liver and kidney tissues in melatonin-treated rats. Rats were divided into three groups as a control, a sham and a treatment groups. While the treatment group received melatonin (10 mg/kg i.p.) for 3 weeks, only ethanol and saline solution were administered to the sham group. The control group received nothing.
Missing Breakfast, Sleep and Exercise: Are You Skipping Out Years of Life
People who regularly have breakfast are a third less likely at risk, of being obese than those who are breakfast skippers. The study aims to find the relationship between breakfast and sleeping habits with adiposity among medical students.