Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0028754 (obesity)
 124,988 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

To investigate possible permanent consequences of an early postnatal overfeeding, the following experimental model was used: Male Wistar rats were divided into three groups after birth: (1) Small litters with 3-4 newborns (overnutrition), (2) normal litters with 12 animals (normonutrition), and (3) large litters with 20-24 newborn rats (undernutrition). After weaning all animals had free access to tap water and standard pellet diet. The serum insulin level of animals from small litters on day 15 of life was highly significantly increased as compared to the other groups. These overfed hyperinsulinaemic rats showed a higher body weight gain during the suckling period trough juvenile life until adulthood, associated with enhanced mean food intake and resulting in an increased relative body weight (per body length) as a sign of obesity. The obesity was found to be correlated with basal hyperinsulinaemia and increased systolic blood pressure in the small-litter-adults. Moreover, the early postnatally overnourished animals developed an increased type I-like diabetes susceptibility to a "subdiabetogenic" dose of streptozotocin in adulthood. These results suggest once more that hyperinsulinism during brain differentiation, in the present experiment induced by early postnatal overnutrition, may represent a predisposing factor for the development of obesity, of increased diabetes susceptibility and also of increased cardiovascular risk in later life.
 ...
PMID:Obesity and enhanced diabetes and cardiovascular risk in adult rats due to early postnatal overfeeding. 152 66

Male weanling rats received dorsomedial hypothalamic nucleus lesions (DMNL) or sham operations and were fed for 173 postoperative days a high-fat diet and given a 32% sucrose solution as drinking fluid. This was supplemented with chocolate chip cookies, potato chips and marshmallows. Other DMNL and sham-operated controls were fed lab chow instead of the above high-fat junk food diet (HFJF) and given tap water instead of 32% sucrose solution. All animals were killed on postoperative day 174. Caloric intake per 100 g body weight was similar in all groups; however, the HFJF fed control and DMNL rats had significantly elevated carcass fat. Since HFJF-DMNL rats were not nearly as obese as the HFJF control animals, it appears that the DMNL offered some protection against the HFJF-diet-produced obesity. When their smaller body size is considered. DMN lesions had no effect on brown adipose tissue (BAT) mass in chow-fed or HFJF fed rats, whereas BAT size was significantly enlarged in HFJF-fed control animals. This suggests but does not prove that HFJF-fed controls, but not DMNL rats, may be using dietary-induced thermogenesis (DIT) to attenuate their obesity. We hypothesize that the HFJF-fed DMNL may not be enhancing DIT as reflected in normal BAT size, because they had not attained a degree of fatness to activate this system, or the DMN lesions impaired its activation. Both HFJF-fed groups showed reduced linear growth compared to their counterparts. The reason for stunting is uncertain, but may be related to their low plasma insulin concentrations.
 ...
PMID:Brown (BAT) and white (WAT) adipose tissue in high-fat junk food (HFJF) and chow-fed rats with dorsomedial hypothalamic lesions (DMNL rats). 186 61

An elderly obese male with a lengthy history of melanotic stools was admitted and was shown to have a posterior duodenal ulcer by endoscopy. He became obtunded and developed infected ascites. Because of his obesity, ascites, and inability to cooperate, the GI radiologist felt that a Gastrografin upper GI series would not be helpful. We therefore gave the patient 99mTc-labeled sulfur colloid and tap water through his nasogastric tube. We were able to clearly image a site of perforation at the duodenal bulb communicating with the lesser sac.
 ...
PMID:Radionuclide detection of duodenal ulcer perforation. 271 33

To investigate the effect of oral nicotine administration on insulin resistance and insulin secretion in an animal model of obesity, Zucker fatty rats were administered nicotine tartrate dihydrate orally through tap water (4.6 mg/kg/d, N group). Plasma nicotine concentrations in N group were 33.67 +/- 10.49 ng/mL. The control (C) group consisted of pair-fed control rats. After 8 weeks of nicotine administration, both groups of rats were administered glucose (2 g/kg) orally in an anesthetized state, and blood was collected for glucose and plasma insulin measurements. The pancreases were isolated and perfused in vitro under pentobarbital anesthesia 1 week after glucose administration. The fat tissues were excised. The levels of tumor necrosis factor (TNF)-alpha protein were assessed using enzyme-linked immunosorbent assay (ELISA) or Western blot analysis. Serum leptin levels were measured using radioimmunoassay (RIA). Blood glucose levels in N group were significantly lower than in C group before and 120 minutes after glucose administration. The insulin secretion from the isolated perfused pancreases of N group appeared to be decreased compared with C group, but there was no significant difference. Histologic examination showed that the mean size of the pancreatic islets in N group was significantly smaller than in C group. The composition ratios of alpha and beta cell mass of the pancreatic islets and fibroelastic tissues were not altered by nicotine administration. Portal TNF-alpha levels were comparable to peripheral levels in both groups. There were no significant differences in peripheral serum levels of TNF-alpha, free fatty acids (FFA), or leptin levels between N and C group. The TNF-alpha levels in visceral fat tissues in N group were significantly lower than those in C group. These results suggest that oral nicotine administration reduces insulin resistance in obese diabetic rats by decreasing production of TNF-alpha in the visceral fat tissues. Decreased islet size may be a secondary phenomenon induced by ameliorated insulin resistance, because the cellularity and fibroelastic tissues were not affected by the nicotine.
 ...
PMID:Oral nicotine administration decreases tumor necrosis factor-alpha expression in fat tissues in obese rats. 1117 79

In Western society, the triad of hypertension, metabolic syndrome and obesity (which caries a high risk for renal disease) is increasing, as is the intake of caffeine. However, no information is available regarding the metabolic or renal consequences of caffeine consumption in this complex disease entity. The purpose of this study was to investigate the effects of chronic caffeine consumption on renal function and metabolic status in obese ZSF1 rats, an animal model of obesity, hypertension and the metabolic syndrome. Fifteen, 18-week-old male, obese ZSF1 rats were randomized to drink tap water (Cont, n = 8) or 0.1% solution of caffeine (Caff, n = 7) for 8 weeks. Metabolic and renal function measurements were performed at baseline and after 4 and 8 weeks of treatment. Caffeine treatment significantly (p < 0.05) reduced body weight, food, and fluid consumption and improved insulin sensitivity (fasting insulin 129.6+/-8.1 vs 97.5+/-3.6 microIU/mL; fed insulin 146.3+/-8.5 vs 110.6+/-3.4 microIU/mL; fasting glucose 138.7+/-13.4 vs 145+/-8.0 mg/dL; fed glucose 373+/-19.4 vs 283.3+/-19.6 mg/dL, Cont vs Caff, respectively). After 8 weeks of caffeine treatment, animals were less glycosuric as compared with control group. Area under glucose curves (AUC-glucose) in oral glucose tolerance test did not differ between the two groups (AUC- glucose: 592.5+/-42.7 vs 589.5+/-20.5 mg/dL x h, Cont vs Caff), whereas caffeine treatment significantly decreased AUC of insulin (AUC-insulin: 257.77+/-12.9 vs 198.0+/-5.9 microIU/mL x h, Cont vs. Caff, p<0.05). No differences were found with regard to plasma triglycerides and glycerol levels; however, caffeine significantly increased cholesterol levels after 4 and 8 weeks (2F-Anova, p<0.001). Moreover, caffeine significantly decreased creatinine clearance after 4 and 8 weeks (CrCl, Cont: 3.5+/-0.4, Caff: 2.2+/-0.2 L/kg/day, p<0.05) and increased protein/CrCl ratio (Cont: 323+/-30, Caff: 527+/-33 mg/L/day). Caffeine treatment for 8 weeks tended to increase plasma norepinephrine levels (p<0.06), but the two groups did not differ with regard to plasma renin activity, blood pressure, renal blood flow or and renal vascular resistance. The study indicates that caffeine improves insulin sensitivity but increases plasma cholesterol levels and impairs renal function in obesity with the metabolic syndrome and hypertension. Our results imply that the health consequences of chronic caffeine consumption may depend heavily on underlying pathophysiology process.
 ...
PMID:Renal and metabolic effects of caffeine in obese (fa/fa(cp)), diabetic, hypertensive ZSF1 rats. 1141 48

To evaluate the effect of obesity on spinal anesthesia for cesarean section, we retrospectively studied 90 parturients who had undergone cesarean section, dividing the patients into 2 groups: obesity group (body mass index > 30, n = 41); control group (body mass index < 30, n = 49). Total surgical time and anesthetic time were longer in the obesity group than in the control group. The amount of ephedrine administered was also greater in the obesity group than in the control group. However, there were no significant differences in time for spinal tap and the incidence of hypotension between the two groups. Spinal anesthesia for cesarean section in obese patients may be an acceptable method.
 ...
PMID:[The effect of obesity on spinal anesthesia for cesarean section]. 1175 24

We report a 43 years old female, admitted due to fatigability, asthenia and diffuse abdominal pain. On admission, obesity, slowness of thinking, bradycardia, distention of jugular veins and ascites were observed on physical examination. Laboratory showed undetectable thyroid hormone levels, a chest X ray showed bilateral pleural effusion and an enlarged heart. An echocardiography showed a massive pericardial effusion with collapse of the right atrium and dilatation of both caval veins. A pericardial tap was performed, draining 350 ml. Thyroid hormone substitution was started and after 12 months of follow up, the heart size decreased and a control echocardiogram showed a minimal pericardial effusion.
 ...
PMID:[Massive pericardial effusion and cardiac tamponade as the presentation form of hypothyroidism]. 1177 48

Weanling female and male Holtzman rats received bilateral electroytic lesions in the ventromedial hypothalamic nucleus (VMN) at the age of 27 and 26 days, respectively. Sham-operated rats served as controls. The animals were maintained on a synthetic diet (4.2 Cal/g) and tap water ad lib, and body weight, Lee (obesity) Index, tail length and food and water intake were recorded weekly for 6 weeks. The only parameters in which a significant sex difference could be demonstrated were body weight gains and water intake which were greater in the male VMN rats. Female and male VMN rats also utilized food energy for fat deposition, body weight and body length change to the same extent. The data also show that in growing animals, body weight is a poor criterion for the accurate assessment of obesity status and true growth.
 ...
PMID:The weanling rat ventromedial syndrome: males get just as fat as females. 1467 95

Urolithiasis is a multifactorial recurrent disease of world-wide distribution in rural, urban, industrial and non-industrial regions. Changes in urinary pH is a risk factor especially with hyperuricosuria, hypercalciuria or hyperoxaluria. With recurrence, hypercalcuria and higher urinary oxalate levels are more frequent. Hypercalciuria and hyperuricosuria showed correlation with family history of stones. The ionic relations between various stone forming salts in urine of patients are opposite to that in controls and are well represented in stone composition. Obesity is a risk factor in both genders. Over eating a diet rich in all nutrients was associated with hyperuricosuria while a diet high only in fat was associated with other urinary disturbances. High protein and fat intake are risk factors. High or low calcium diet was associated with urolithiasis and supplemental calcium is not a risk factor. Potassium and magnesium citrate are potent in inhibiting the growth of stone fragments after extracorporeal shock wave lithotripsy. Whether in patients or normal subjects, drinking hard water should be avoided; tap water or low calcium content water is preferable. Seasonal variations in temperature affected urinary volume, pH and relative saturation of uric acid. To prevent recurrence, patients should maintain high fluid intake achieving a urine volume of 2 liters per day.
 ...
PMID:Urolithiasis in adults. Clinical and biochemical aspects. 1595 54

Genetic deletion of inducible nitric oxide synthase (NOS) in mice has been shown to improve high-fat diet (HFD)-induced insulin resistance. However, a pathophysiological role of endogenous nitric oxide (NO) in obesity-related insulin resistance remains controversial. To address this issue, we examined the metabolic phenotypes in HFD-induced obese mice with chronic blockade of NO synthesis by a NOS inhibitor, N(G)-nitro-l-arginine methyl ester (L-NAME). Six-week-old male C57BL/6j mice were provided free access to either a standard diet (SD) or a HFD and tap water with or without L-NAME (100 mg/kg.d) for 12 wk. L-NAME treatment significantly attenuated body weight gain of mice fed either SD or HFD without affecting calorie intake. L-NAME treatment in HFD-fed mice improved glucose tolerance and insulin sensitivity. HFD feeding induced inducible NOS mRNA expression, but not the other two NOS isoforms, in white adipose tissue (WAT) and skeletal muscle. L-NAME treatment up-regulated uncoupling protein-1 in brown adipose tissue of HFD-fed mice but down-regulated monocyte chemoattractant protein-1 and CD68 mRNAs levels in WAT. HFD feeding up-regulated leptin mRNA levels but conversely down-regulated adiponectin mRNA levels in WAT, but these effects were unaffected by L-NAME treatment. Moreover, L-NAME treatment also increased peroxisome proliferator-uncoupling protein-3 mRNA levels in skeletal muscles of HFD-fed mice. Increased urinary excretion of norepinephrine after HFD feeding was augmented in L-NAME-treated mice. Insulin-stimulated tyrosine phosphorylation of insulin receptor substrate-1 and serine phosphorylation of Akt/Akt2 in soleus muscle was markedly impaired in HFD-fed mice but reversed by L-NAME treatment. In conclusion, chronic NOS blockade by L-NAME in mice ameliorates HFD-induced adiposity and glucose intolerance, accompanied by reduced adipose inflammation and improved insulin signaling in skeletal muscle, suggesting that endogenous NO plays a modulatory role in the development of obesity-related insulin resistance.
 ...
PMID:Chronic blockade of nitric oxide synthesis reduces adiposity and improves insulin resistance in high fat-induced obese mice. 1787 34


1 2 3 4 5 Next >>