Effects of a therapeutic weight loss diet on weight loss and metabolic health in overweight and obese dogs.

Obesity has become a major health issue in dogs. Obesity in dogs increases the risk of many chronic diseases and chronic low-grade inflammation. The objective of this study was to determine the effect of a therapeutic weight loss (TWL) diet on weight loss and metabolic health in overweight and obese dogs. Thirty overweight and obese dogs were randomized into two groups with 15 dogs per group based on key baseline (BSL) parameters and allotted to either a control or TWL diet for 6 mo. At the start of the study, the control group had six females and nine males with mean age of 9.12 ±â€…0.48 (mean ±â€…SEM) yr; there were seven females and eight males with mean age of 9.73 ±â€…0.63 yr in the TWL group. The control group and the TWL group had comparable body weight (34.78 ±â€…0.76 and 34.63 ±â€…0.86 kg, respectively), % body fat (BF; 39.77 ±â€…1.18 and 39.89 ±â€…0.93, respectively), and body condition score (BCS; 7.80 ±â€…0.14 and 7.67 ±â€…0.16 on a 9-point BCS scale, respectively). The control (CTRL) diet was formulated based on the macronutrient ratio of a commercial metabolic diet, and the TWL diet was enriched with dietary protein, fish oil, and soy germ meal. Both diets were fortified with essential nutrients to account for caloric restriction during weight loss. Dogs were fed with 25% less than BSL maintenance energy requirement (MER) for the first 4 mo and if they did not reach a BCS of 5, they were fed 40% less than BSL MER for the last 2 mo. Body composition was determined by dual-energy x-ray absorptiometry. Postprandial glucose profiles were determined by continuous glucose monitoring devices. Serum samples were collected for analyses of blood parameters, hormones, and cytokines. All data were analyzed using SAS 9.3, with significance being P < 0.05. At the end of the study, the control group and the TWL group had comparable weight loss (-5.77 ±â€…0.31 and -6.14 ±â€…0.32 kg, respectively; P = 0.4080). But the TWL group lost significantly (P = 0.034) more BF (-13.27 ±â€…1.28%) than the control group (-9.90 ±â€…1.23%). In addition, the TWL diet completely prevented loss of lean body mass (LBM) in dogs compared with BSL. Dogs fed with the TWL diet had significantly lower fasting serum cholesterol, triglycerides, insulin, leptin, mean postprandial interstitial glucose, and pro-inflammatory cytokines compared with dogs fed with the CTRL diet. In summary, the TWL diet prevented loss of LBM, promoted weight loss and metabolic health, and reduced pro-inflammatory cytokines and chemokines in overweight and obese dogs during weight loss.

Obesity has become a major health issue in dogs and increases the risk of many chronic diseases and chronic low-grade inflammation. The objective of this study was to determine the effect of a therapeutic weight loss (TWL) diet on weight loss and metabolic health in overweight and obese dogs. Thirty overweight and obese dogs were randomized into two groups with 15 dogs per group and assigned to either a control (CTRL) diet or TWL diet for a 6 mo weight loss study. Changes in body composition were determined every 2 mo. Blood samples were collected to measure changes in lipid profiles, hormones, cytokines, and chemokines. Postprandial glucose profiles were determined by a continuous glucose monitoring system. The results of the study showed that the TWL diet completely prevented loss of lean body mass (LBM) in dogs compared with baseline. Dogs fed with the TWL diet had significantly lower fasting serum cholesterol, triglycerides, insulin, leptin, mean postprandial glucose, and pro-inflammatory cytokines compared with dogs fed with the CTRL diet. In summary, the TWL diet prevented loss of LBM, promoted weight loss and metabolic health, and reduced pro-inflammatory cytokines in overweight and obese dogs during weight loss.

Efficacy of a Therapeutic Diet on Dogs With Signs of Cognitive Dysfunction Syndrome (CDS): A Prospective Double Blinded Placebo Controlled Clinical Study.

Cognitive dysfunction syndrome (CDS) is a common condition in senior dogs, which may be analogous to dementia such as Alzheimer's disease (AD) in people. In humans, AD has been associated with many risk factors such as reduced cerebral glucose metabolism, docosahexaenoic acid (DHA) deficiency, chronic oxidative stress, and chronic inflammation. By targeting some of these risk factors, we have developed two nutritional solutions (medium chain triglyceride, MCT and Brain Protection Blend, BPB) to enhance cognitive function and slow aging-induced cognitive decline. These have been positively evaluated in colony housed senior dogs and cats. The objective of this clinical study was to evaluate the effects of diets with MCTs and the BPB on client-owned dogs with CDS. Participating veterinary clinics screened senior dogs for signs of CDS as determined by a Senior Canine Behavior Questionnaire and a Canine Medical Health Questionnaire. Eighty-seven dogs were randomly enrolled into one of three diet groups with 29 dogs per group: Control, 6.5% MCT oil + BPB (6.5% MCT diet), 9% MCT oil + BPB (9% MCT diet). Diets were fed for a period of 90 days, and each dog's CDS signs were re-evaluated at day 30 and day 90. All 6 categories of the CDS signs were significantly improved (p <0.05) in the dogs given the 6.5% MCT diet at the end of the 90-day study. Control only improved in 4 out 6 categories. The 9% MCT diet only improved in dogs that accepted the diet. The results from this dog study confirm the benefits of MCT and BPB in managing clinical signs of CDS in dogs. The results support our hypothesis that targeting known risk factors associated with brain aging and AD is able to improve symptoms of CDS in dogs. These data may facilitate the development of similar nutrient blends to manage MCI and AD.

Cognitive enhancement in middle-aged and old cats with dietary supplementation with a nutrient blend containing fish oil, B vitamins, antioxidants and arginine.

Cognitive dysfunction syndrome is a major disease affecting old cats and is the consequence of severe and irreversible loss of brain cells and brain atrophy. The present study focused on the hypothesis that the optimal strategy for promoting successful brain ageing is to target risk factors associated with brain ageing and dementia. We used a nutritional strategy involving supplementation with a blend of nutrients (antioxidants, arginine, B vitamins and fish oil) to test this hypothesis. Middle-aged and old cats between 5·5 and 8·7 years of age were assigned to cognitively equivalent control or treatment groups based on prior cognitive experience and performance on baseline cognitive tests. The cats in the treatment group were maintained on a diet supplemented with the nutrient blend and the cats in the control group were maintained on the identical base diet without the additional supplementation. After an initial wash-in period, all cats were tested on a battery of cognitive test protocols. The cats fed the test diet showed significantly better performance on three of four test protocols: a protocol assessing egocentric learning, a protocol assessing discrimination and reversal learning and a protocol focused on acquisition of a spatial memory task. The results support the hypothesis that brain function of middle-aged and old cats can be improved by the nutrient blend that was selected to minimise or eliminate the risk factors associated with brain ageing and dementia.

Polygenic inheritance of canopy wilting in soybean [Glycine max (L.) Merr.].

As water demand for agriculture exceeds water availability, cropping systems need to become more efficient in water usage, such as deployment of cultivars that sustain yield under drought conditions. Soybean cultivars differ in how quickly they wilt during water-deficit stress, and this trait may lead to yield improvement during drought. The objective of this study was to determine the genetic mechanism of canopy wilting in soybean using a mapping population of recombinant inbred lines (RILs) derived from a cross between KS4895 and Jackson. Canopy wilting was rated in three environments using a rating scale of 0 (no wilting) to 100 (severe wilting and plant death). Transgressive segregation was observed for the RIL population with the parents expressing intermediate wilting scores. Using multiple-loci analysis, four quantitative trait loci (QTLs) on molecular linkage groups (MLGs) A2, B2, D2, and F were detected (P