Diabetes-related nutrition knowledge and dietary intake among adults with type 2 diabetes

In this issue of the British Journal of Nutrition, Breen et al. present a well-written and comprehensive study examining nutrition knowledge among a sample of persons with type 2 diabetes using a validated instrument, food label use and weight satisfaction. The authors explore the relationship between this knowledge and nutrient intake. Although the need of including education on dietary and other lifestyle-related determinants of type 2 diabetes is currently evident and recommended in major guidelines, there is startling scarcity in the literature on this subject

Healthy ageing: From a myth to a reality

The dream of living long and healthy has accompanied man since the beginning of time. The present remarkable increased life expectancy is most probably the result of better living conditions, medical progress, and better health care organization. Dramatic demographic changes occur not only in industrialised countries, but primarily affect the least developed part of the world. This extraordinary success of humanity brings with it many challenges to build a future with healthy seniors. The recently released World report on ageing and health, one of the most important WHO documents in recent years, confirms the crucial importance of the maintenance of functional ability throughout life

Magnesium and type 2 diabetes

Type 2 diabetes is frequently associated with both extracellular and intracellular magnesium (Mg) deficits. A chronic latent Mg deficit or an overt clinical hypomagnesemia is common in patients with type 2 diabetes, especially in those with poorly controlled glycemic profiles. Insulin and glucose are important regulators of Mg metabolism. Intracellular Mg plays a key role in regulating insulin action, insulin-mediated-glucose-uptake and vascular tone. Reduced intracellular Mg concentrations result in a defective tyrosine-kinase activity, postreceptorial impairment in insulin action and worsening of insulin resistance in diabetic patients. A low Mg intake and an increased Mg urinary loss appear the most important mechanisms that may favor Mg depletion in patients with type 2 diabetes. Low dietary Mg intake has been related to the development of type 2 diabetes and metabolic syndrome. Benefits of Mg supplementation on metabolic profiles in diabetic patients have been found in most, but not all clinical studies and larger prospective studies are needed to support the potential role of dietary Mg supplementation as a possible public health strategy in diabetes risk. The aim of this review is to revise current evidence on the mechanisms of Mg deficiency in diabetes and on the possible role of Mg supplementation in the prevention and management of the disease

MAGNESIUM, OXIDATIVE STRESS AND AGING MUSCLE

Magnesium (Mg) deficiency, aside from having a negative impact on the energy production pathways required by the mitochondria to generate ATP, also reduces the threshold antioxidant capacity of the aging organism and its resistance to free-radical damage. Mg acts as an antioxidant against free radical damage of the mitochondria. Chronic Mg deficiency results in excessive production of oxygen-derived free radicals and low-grade inflammation. Chronic inflammation and oxidative stress have been identified as pathogenic factors in several age-related conditions. Aging is often associated with Mg inadequacy, muscle loss and sarcopenia. Although the importance of magnesium as a determinant of muscle performance in young athletes is well-established, its role in maintaining muscle integrity and function in older adults is largely unknown. Serum magnesium concentration is an independent correlate of muscle performance in older persons. Whether magnesium supplementation would prevent sarcopenia and improve muscle function in the elderly remains to be demonstrated

SERUM IONIZED MAGNESIUM IN DIABETIC OLDER PERSONS

Objective. Several alterations of magnesium metabolism have been associated with type 2 diabetes pathophysiology, a condition particularly frequent in older persons. We aimed to evaluate serum total (Mg-tot) and serum ionized magnesium (Mg-ion) in older persons with type 2 diabetes in order to explore clinically applicable methods for the detection of magnesium deficit. Material/Methods: Mg-tot and Mg-ion were measured in 105 fasting subjects with type 2 diabetes (mean age: 71.10.8 years; M/F: 45/60) and in 100 age-matched non-diabetic control persons (mean age: 72.20.8 years; M/F: 42/58). Results: Mg-ion concentrations were significantly lower in diabetic persons compared with controls (0.490.05 mmol/L vs. 0.550.05 mmol/L; p<0.001). Mg-tot was also slightly but significantly lower in diabetic patients (0.820.007 mmol/L vs. 0.840.006 mmol/L; p<0.05). There was an almost complete overlap in the values of Mg-tot in older diabetic patients and controls; conversely, 44.8% of diabetic patients had Mg-ion values below 0.47 mmol/L, while none of the controls did. After adjustment for age, sex, BMI, and triglycerides, Mg-tot was significantly associated with FBG in all the participants (p<0.05) and Mg-ion was significantly associated with FBG in all the participants (p<0.01) and with HbA1c in diabetic participants (p<0.001). Conclusions: Alterations of magnesium serum concentrations are common in type 2 diabetic older adults; Mg-ion evaluation may help to identify subclinical magnesium depletion (i.e. in patients with normal Mg-tot); the close independent associations of Mg-tot and Mg-ion with FBG and with HbA1c reinforce the possible link between magnesium homeostasis and altered glucose metabolism

The Interplay between Magnesium and Testosterone in Modulating Physical Function in Men

The role of nutritional status as determinant of successful aging is very well recognized. There is recent evidence that nutrition may exert its beneficial effects through the modulation of the hormonal anabolic milieu. Under-nutrition and anabolic hormonal deficiency frequently coexist in older individuals determining an increased risk of mobility impairment and adverse outcomes. Mineral dietary assessment has received attention as key component of the nutritional modulation of anabolic status and physical performance. There is evidence that several minerals, including magnesium, exert a positive influence on Insulin-like Growth Factor-1 (IGF-1) secretion in both sexes, and Testosterone (T) in men. In this review we summarize the existing knowledge about the mechanisms by which magnesium can affect T bioactivity in older men. Particular attention will be also devoted to the preliminary observational and intervention studies addressing the relationship between magnesium and T in adult and older individuals. We believe that, if larger studies will confirm these pivotal data, hormonal and mineral strategies might be adopted as synergistic treatment to approach the multifactorial nature of accelerated aging

Adrenal cavernous hemangioma: which correct decision making process?

Introduction: Cavernous hemangioma of the adrenal gland is a rare benign tumor characterized by the presence of blood-fil- led, dilated vascular spaces. These adrenal masses are usually non-functioning and the patients have no symptoms so the diagnosis is incidental. Methods: We performed a systematic literature review for all articles published until April 2015. The initial search identified 98 publications. We considered some characteristics: the mean age of the patients at diagnosis was 59 years (range 19 - 84); there were approximately 1.7 times more female patients than male patients; mean diameter of the lesions was 10.3 cm (range 2 - 25). Surgical treatment was more often open with midline or subcostal incision. Results: From literature analysis we know that small adrenal hemangiomas are usually asymptomatic. Only four patients in our literature review show endocrinologic disturbances with three cases of subclinical Cushing’s syndrome and a case of hyperaldo- steronism. The pre-operative radiologic features play a fundamental role for correct surgical approach. On enhanced Computed Tomography (CT) scan adrenal hemangiomas tend to be heterogeneous, hypodense lesions with high-density rim of tissue at the periphery. On Magnetic Resonance Imaging (MRI) common findings associated with adrenal hemangiomas are hypointense inhomo- geneous masses with central hyperintensity on T1 images and a high intensity peripheral rim on T2 images due to hemorrhage or necrosis. Conclusion: Laparoscopic adrenalectomy is considered the standard treatment in case of benign lesions. Some authors sugge- st that the main limitation during laparoscopic dissection for large and potentially malign adrenal tumors is incomplete resection and capsular disruption with increased risk of local recurrence and intra-abdominal neoplastic dissemination. We recommend for these patients an integrated multidisciplinary approach that considers endocrine studies, preoperative radiologic findings and the expe- rience of surgical team