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The Ketogenic Diet and Its Clinical Applications in Type I and II Diabetes

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The Ketogenic Diet and Its Clinical Applications in Type I and II Diabetes ISSN: 2377-3634 Pilla. Int J Diabetes Clin Res 2018, 5:092 DOI: 10.23937/2377-3634/1410092 Volume 5 | Issue 3 International Journal of Open Access Diabetes and Clinical Research Review ARticle The Ketogenic Diet and its Clinical Applications in Type I and II Diabetes * Check for Raffaele Pilla updates External Pharmacy, St. John of God - Fatebenefratelli Hospital, Benevento, Italy *Corresponding author: Raffaele Pilla, Pharm.D, PhD, External Pharmacy, St. John of God - Fatebenefratelli Hospital, Benevento, Italy, E-mail: [email protected] Introduction across the blood-brain barrier by monocarboxylic acid transporters to fuel brain function. Starvation or nutri- It has been shown that metabolic-based therapies, tional ketosis is an essential survival mechanism that such as nutritional ketosis, are effective to contrast sei- ensures metabolic flexibility during prolonged fasting or zure disorders and various acute and chronic neurolo- lack of carbohydrate ingestion [1]. Therapeutic ketosis gical disorders [1-4]. From a physiological perspective, leads to metabolic adaptations that may improve brain glucose is the primary metabolic fuel for cells. However, metabolism, restore mitochondrial ATP production, many neurodegenerative disorders have been recent- decrease reactive oxygen species production, reduce ly associated with impaired glucose transport and me- inflammation, and increase neurotrophic factors’ fun- tabolism and with mitochondrial dysfunction causing ction [12]. It has been shown that KD mimics the effects energy deficits, such as in Alzheimer’s disease, Parkin- of fasting and the lack of [13] glucose/insulin signaling, son’s disease, general seizure disorders, and traumatic which promotes a metabolic shift towards fatty acid uti- brain injury [5-9]. Ketone bodies and tricarboxylic acid lization [14]. KD can only induce a modest blood ketone cycle intermediates represent alternative fuels for the level elevation and requires extreme dietary carbohy- brain and can potentially bypass the rate-limiting steps drate restriction for maintaining sustained (therapeutic) associated with impaired neuronal glucose metabolism. levels of ketosis [11]. Prior to the advent of exogenous Therefore, therapeutic ketosis (elevated blood ketone insulin for the treatment of diabetes mellitus (type II) levels) can be considered as a metabolic therapy by pro- in the 1920's, the general guidelines for therapy were viding alternative energy substrates, which may have represented only by dietary modifications. At the time, potent cellular protective properties independent of diet recommendations aimed to control blood gluco- their bioenergetic function [10]. It has been estimated se (which in most cases was only glycosuria) and were that the brain derives over 60% of its total energy from dramatically different from current low-fat, high-car- ketones when glucose availability is limited [11]. In fact, bohydrate dietary recommendations for patients with after prolonged periods of fasting or ketogenic diet (KD), diabetes [15,16]. For example, Dr. Elliot Joslin’s Diabetic the body utilizes energy obtained from free fatty acids Diet in 1923 consisted of "meats, poultry, game, fish, (FFAs) released from adipose tissue. Because the brain clear soups, gelatin, eggs, butter, olive oil, coffee, tea" is unable to derive significant energy from FFAs, hepa- and contained approximately 5% of energy from car- tic ketogenesis converts FFAs into ketone bodies-hy- bohydrates, 20% from protein, and 75% from fat [17]. A droxybutyrate (BHB) and acetoacetate (AcAc)-while a similar diet was advocated by Dr. Frederick Allen from percentage of AcAc spontaneously decarboxylates to the same period [18]. acetone. Large quantities of ketone bodies accumula- te in the blood (up to 5 mM) through this mechanism. The aim of this review article is to analyze the cur- This represents a state of normal physiological ketosis rent literature in matter of therapeutic ketosis and its and can be therapeutic. Ketone bodies are transported successful clinical applications in diabetes type I and II, Citation: Pilla R (2018) The Ketogenic Diet and its Clinical Applications in Type I and II Diabetes. Int J Diabetes Clin Res 5:092. doi.org/10.23937/2377-3634/1410092 Accepted: September 04, 2018: Published: September 06, 2018 Copyright: © 2018 Pilla. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Pilla. Int J Diabetes Clin Res 2018, 5:092 • Page 1 of 6 • DOI: 10.23937/2377-3634/1410092 ISSN: 2377-3634 thus paving the road towards a wider and safer use of follow-up revealed excellent glycemic control, improved this metabolic approach in these patients. activity level, significant developmental achievements, th th Therapeutic Ketosis Approach in Diabetes and a catchup of linear growth from < 5 to the 50 per- centile [25]. In 2014, Aylward and colleagues published Type I an interesting case report on a successful treatment of Diabetic ketoacidosis is a life-threatening condition a child affected by myoclonic astatic epilepsy and type I and a major cause of morbidity and mortality in children diabetes. The major challenge in these cases remains the with type I diabetes. The deficiency of insulin leads to me- distinction between diet-induced ketosis and diabetic ke- tabolic decompensation, causing hyperglycemia and ke- toacidosis [26]. On another note, congenital hyperinsuli- tosis that resolves with the administration of insulin and nism (CHI) is the most frequent cause of hypoglycemia in fluids. However, an induced state of ketosis is the basis children. In addition to increased peripheral glucose uti- for the success of the KD, which is an effective therapy for lization, dysregulated insulin secretion induces profound children with refractory epilepsy [19,20]. Roxana and col- hypoglycemia and neuroglycopenia by inhibiting glycoge- leagues reported the case of a 2-year-old girl who presen- nolysis, gluconeogenesis and lipolysis. As a consequence, ted to the emergency department with 1-week history of the shortage of all cerebral energy substrates (glucose, decreased activity, polyuria, and decreased oral intake. lactate and ketones) might lead to severe neurological Her past medical history was remarkable for epilepsy, for sequelae. Patients with CHI unresponsive to medical tre- which she was started on the KD with a significant impro- atment can be subjected to near-total pancreatectomy vement. Her laboratory evaluation was compatible with with increased risk of secondary diabetes. In this context, diabetic ketoacidosis, and fluids and insulin were given the KD is intended to provide alternative cerebral sub- until correction. Because of concerns regarding recurren- strates such ketone bodies. In 2015, Maiorana and his ce of her seizures, the KD was resumed along with the si- group treated a child with drug-resistant, long-standing multaneous use of insulin glargine and insulin aspart. Uri- CHI who suffered from epilepsy and showed neurode- ne ketones were kept in the moderate range to keep the velopmental abnormalities. After attempting various effect of ketosis on seizure control. Under this combined therapeutic regimes without success, near-total pancre- therapy, the patient remained seizure-free with no new atectomy was suggested to parents, who asked for other episodes of diabetic ketoacidosis [21]. Diabetes type I se- options. Therefore, Maiorana’s group proposed KD in ems to be more prevalent in epilepsy, and low-carbohy- combination with insulin-suppressing drugs. The diet was drate diets improve glycemic control in diabetes type II, continuously administered for 2 years. Soon after the first but data on the use of KD in epilepsy and diabetes are 6 months, the patient was free of epileptic crises, presen- scarce [22]. Dressler and colleagues presented a 15-mon- ted normalization of EEG, and showed a marked recover th follow-up of a 3 years and 6-months-old girl with dia- in psychological development and quality of life [27]. Very betes type I (on the KD), right-sided hemiparesis, and recently, another group studied whether very-low-car- focal epilepsy due to a malformation of cortical develop- bohydrate high-fat diets could improve glycemic control ment. Although epileptiform activity on electroencepha- without causing any adverse health effects in adults with lography (EEG) persisted (especially during sleep), clini- type I diabetes: 11 adults (7 men, 4 women followed a cally overt seizures have not been reported since the KD. KD (< 55 g carbohydrate per day) for a mean of 2.6 ± 3.3 An improved activity level and significant developmental years (β-hydroxybutyrate 1.6 ± 1.3 mmol/l), and then un- achievements were noticed, glycosylated hemoglobin derwent sampling and analysis of fasting blood, and were levels improved, and glycemic control was excellent, wi- fitted with a blinded continuous glucose monitoring for 7 thout severe side effects. This study demonstrated that days, in order to measure glycemic variability. Participan- diabetes does not preclude the use of the KD [23]. Howe- ts displayed no evidence of hepatic or renal dysfunction ver, more recently Lucchi and colleagues observed that and an excellent glycosylated hemoglobin type A1C level KD deeply affected the electrographic profile, thus sugge- profile with little glycemic variability [28]. sting a dissociation between the EEG
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