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Meng Y, Sun J, Zhang G. Take the bull by the horns and tackle the potential downsides of the ketogenic diet. Nutrition 2024; 125:112480. [PMID: 38788511 DOI: 10.1016/j.nut.2024.112480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 03/05/2024] [Accepted: 04/30/2024] [Indexed: 05/26/2024]
Abstract
The ketogenic diet (KD) is a distinctive dietary regimen known for its low-carbohydrate and high-fat composition. Recently, it has garnered considerable interest from the scientific community and the general population because of its claimed efficacy in facilitating weight reduction, improving the management of glucose levels, and raising overall energy levels. The core principle of the KD is the substantial decrease in carbohydrate consumption, which is subsequently substituted by ingesting nourishing fats. While the KD has promising advantages and is gaining popularity, it must be acknowledged that this dietary method may not be appropriate for all individuals. The dietary regimen may give rise to adverse effects, including constipation, halitosis, and imbalances in electrolyte levels, which may pose a potential risk if not adequately supervised. Hence, thorough and meticulous inquiry is needed to better comprehend the possible hazards and advantages linked to the KD over prolonged durations. By obtaining a more comprehensive perspective, we can enhance our ability to make well-informed judgments and suggestions as to implementation of this specific dietary regimen.
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Affiliation(s)
- Yiming Meng
- Department of Central Laboratory, Cancer Hospital of Dalian University of Technology, Liaoning Cancer Hospital & Institute, Shenyang, China.
| | - Jing Sun
- Department of Biobank, Cancer Hospital of Dalian University of Technology, Liaoning Cancer Hospital & Institute, Shenyang, China
| | - Guirong Zhang
- Department of Central Laboratory, Cancer Hospital of Dalian University of Technology, Liaoning Cancer Hospital & Institute, Shenyang, China
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Suarez R, Chapela S, Llobera ND, Montalván M, Vásquez CA, Martinuzzi ALN, Katsanos CS, Verde L, Frias-Toral E, Barrea L, Muscogiuri G. Very Low Calorie Ketogenic Diet: What Effects on Lipid Metabolism? Curr Nutr Rep 2024; 13:516-526. [PMID: 39008211 PMCID: PMC11327205 DOI: 10.1007/s13668-024-00556-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2024] [Indexed: 07/16/2024]
Abstract
PURPOSE OF REVIEW This review aims to critically examine how VLCKD affects plasma lipoprotein, lipid and cholesterol metabolism. Cardiovascular disease is a worldwide health problem affecting millions of people and leading to high rates of mortality and morbidity. There is a well-established association between cardiovascular disease and circulating cholesterol. Various dietary recommendations are currently available for the management of dyslipidemia. RECENT FINDINGS The very low-calorie ketogenic diet (VLCKD) is becoming increasingly popular as a treatment option for several pathological conditions, including dyslipidemia. In addition to being low in calories, the VLCKD's main feature is its unique calorie distribution, emphasizing a reduction in carbohydrate consumption in favor of fat as the primary calorie source. Lowering calorie intake through a VLCKD can reduce the endogenous production of cholesterol. However, if the foods consumed are from animal sources, dietary cholesterol intake may increase due to the higher fat content of animal products. When combined, these dietary practices may have opposing effects on plasma cholesterol levels. Studies investigating the impact of VLCKD on plasma cholesterol and low-density lipoprotein cholesterol levels report contradictory findings. While some studies found an increase in low-density lipoprotein cholesterol levels, others showed a decrease in total cholesterol and low-density lipoprotein cholesterol, along with an increase in high-density lipoprotein cholesterol.
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Affiliation(s)
- Rosario Suarez
- School of Medicine, Universidad Técnica Particular de Loja, Calle Paris, San Cayetano Alto, Loja 110107, Ecuador
| | - Sebastián Chapela
- Facultad de Medicina, Departamento de Bioquímica Humana, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
- Equipo de Soporte Nutricional, Hospital Británico de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Natalia Daniela Llobera
- Equipo de Soporte Nutricional, Hospital Británico de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Martha Montalván
- Universidad Católica Santiago de Guayaquil, Av. Pdte. Carlos Julio Arosemena Tola, Guayaquil, 090615, Ecuador
- Facultad de Ciencias Médicas, Universidad de Guayaquil, Guayaquil, Ecuador
| | - Celina Andrade Vásquez
- School of Medicine, Universidad Técnica Particular de Loja, Calle Paris, San Cayetano Alto, Loja 110107, Ecuador
| | | | | | - Ludovica Verde
- Department of Public Health, University of Naples Federico II, Via Sergio Pansini 5, 80131 Naples, Italy
| | - Evelyn Frias-Toral
- School of Medicine, Universidad Espíritu Santo - Samborondón, 0901952 Samborondón , Ecuador
| | - Luigi Barrea
- Department of Wellbeing, Nutrition and Sport, Pegaso Telematic University, Centro Direzionale Isola F2, Via Porzio, 80143 Naples, Italy
| | - Giovanna Muscogiuri
- Unità di Endocrinologia, Diabetologia e Andrologia, Dipartimento di Medicina Clinica e Chirurgia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131, Naples, Italy.
- Centro Italiano per la cura e il Benessere del Paziente con Obesità (C.I.B.O), Unità di Endocrinologia, Diabetologia e Andrologia, Dipartimento di Medicina Clinica e Chirurgia, Università degli Studi di Napoli Federico II, Via Sergio Pansini 5, 80131 Naples, Italy.
- Cattedra Unesco Educazione Alla Salute E Allo Sviluppo Sostenibile, University Federico II, 80131 Naples, Italy.
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Li N, Cui C, Xu J, Mi M, Wang J, Qin Y. Quercetin intervention reduced hepatic fat deposition in patients with nonalcoholic fatty liver disease: a randomized, double-blind, placebo-controlled crossover clinical trial. Am J Clin Nutr 2024; 120:507-517. [PMID: 39032786 DOI: 10.1016/j.ajcnut.2024.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 07/10/2024] [Accepted: 07/15/2024] [Indexed: 07/23/2024] Open
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) has become a growing public health problem worldwide. However, there is still lack of effective treatment strategies except lifestyle intervention. OBJECTIVES To evaluate whether quercetin improves intrahepatic lipid content in patients with NAFLD. METHODS In this randomized, double-blind, placebo-controlled crossover trial, 41 patients with NAFLD were randomly assigned to receive the quercetin (500 mg) or placebo capsules for 12 wk, then switched interventions for another 12 wk after a 4-wk washout period. The primary outcome was intrahepatic lipid content evaluated by magnetic resonance imaging estimated proton density fat fraction. The secondary outcomes were liver function measurements, etc. Safety outcomes included blood routine. RESULTS A total of 36 patients completed the trial. In intention-to-treat analyses, the quercetin intervention moderately decreased the intrahepatic lipid contents from 11.5% ± 6.4% to 9.6% ± 5.8%, compared with the placebo intervention (decreased by 0.1% ± 2.6%, P = 0.013 and adjusted P value is 0.028). Body weight and body mass index were mildly reduced by 1.5 ± 2.6 kg and 0.5 ± 0.9 kg/m2 after the quercetin intervention (P < 0.05 and both adjusted P values are 0.038), whereas the reductions were only 0.2 ± 1.8 kg and 0.1 ± 0.7 kg/m2 after the placebo intervention. The intrahepatic lipid content reductions were noticeably positively associated with the body weight losses after the quercetin and placebo interventions (r = 0.557 and 0.412, P < 0.001 and P = 0.007, respectively). Subgroup analyses found that the reduction of intrahepatic lipid contents in females (3.0% ± 3.7%) was about twice as large as that in males (1.4% ± 2.5%) with a trend of statistical significance (P = 0.113 and adjusted P value is 0.061). There were no significant differences in other secondary and safety outcomes. No adverse events associated with study intervention were found. CONCLUSIONS Twelve weeks treatment of quercetin could reduce intrahepatic lipid contents in patients with NAFLD, possibly explained by a slightly larger body weight loss in the quercetin group. TRIAL REGISTRATION The trial is registered at www.chictr.org.cn as ChiCTR2100047904.
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Affiliation(s)
- NingChao Li
- Department of Nutrition, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Chun Cui
- Department of Radiology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Jing Xu
- Department of Endocrinology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - ManTian Mi
- Research Center for Nutrition and Health, Institute of Military Preventive Medicine, Army Medical University, Chongqing, China
| | - Jian Wang
- Department of Nutrition, Xinqiao Hospital, Army Medical University, Chongqing, China.
| | - Yu Qin
- Research Center for Nutrition and Health, Institute of Military Preventive Medicine, Army Medical University, Chongqing, China.
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Dyńka D, Rodzeń Ł, Rodzeń M, Łojko D, Kraszewski S, Ibrahim A, Hussey M, Deptuła A, Grzywacz Ż, Ternianov A, Unwin D. Beneficial Effects of the Ketogenic Diet on Nonalcoholic Fatty Liver Disease (NAFLD/MAFLD). J Clin Med 2024; 13:4857. [PMID: 39200999 PMCID: PMC11355934 DOI: 10.3390/jcm13164857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 08/11/2024] [Accepted: 08/12/2024] [Indexed: 09/02/2024] Open
Abstract
The prevalence of nonalcoholic fatty liver disease (NAFLD) is likely to be approaching 38% of the world's population. It is predicted to become worse and is the main cause of morbidity and mortality due to hepatic pathologies. It is particularly worrying that NAFLD is increasingly diagnosed in children and is closely related, among other conditions, to insulin resistance and metabolic syndrome. Against this background is the concern that the awareness of patients with NAFLD is low; in one study, almost 96% of adult patients with NAFLD in the USA were not aware of their disease. Thus, studies on the therapeutic tools used to treat NAFLD are extremely important. One promising treatment is a well-formulated ketogenic diet (KD). The aim of this paper is to present a review of the available publications and the current state of knowledge of the effect of the KD on NAFLD. This paper includes characteristics of the key factors (from the point of view of NAFLD regression), on which ketogenic diet exerts its effects, i.e., reduction in insulin resistance and body weight, elimination of fructose and monosaccharides, limitation of the total carbohydrate intake, anti-inflammatory ketosis state, or modulation of gut microbiome and metabolome. In the context of the evidence for the effectiveness of the KD in the regression of NAFLD, this paper also suggests the important role of taking responsibility for one's own health through increasing self-monitoring and self-education.
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Affiliation(s)
- Damian Dyńka
- Rodzen Brothers Foundation, 64-234 Wieleń, Poland
| | | | | | - Dorota Łojko
- Department of Psychiatry, Poznan University of Medical Science, 60-572 Poznan, Poland
| | - Sebastian Kraszewski
- Department of Biomedical Engineering, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland
| | - Ali Ibrahim
- Schoen Inpatient Children’s Eating Disorders Service, 147 Chester Rd, Streetly, Sutton Coldfield B74 3NE, UK
| | - Maria Hussey
- Private General Medical Practice Maria Hussey, Ojcowa Wola 5, 14-420 Mlynary, Poland
| | - Adam Deptuła
- Faculty of Production Engineering and Logistics, Opole University of Technology, 76 Prószkowska St., 45-758 Opole, Poland
| | - Żaneta Grzywacz
- Faculty of Production Engineering and Logistics, Opole University of Technology, 76 Prószkowska St., 45-758 Opole, Poland
| | - Alexandre Ternianov
- Primary Care Centre Vila Olimpica, Parc Sanitary Pere Virgili, c. Joan Miró 17, 08005 Barcelona, Spain
| | - David Unwin
- Faculty of Health Social Care and Medicine, Edge Hill University, Ormskirk L39 4QP, UK
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Wang Z, Chen T, Wu S, Dong X, Zhang M, Ma G. Impact of the ketogenic diet as a dietary approach on cardiovascular disease risk factors: a meta-analysis of randomized clinical trials. Am J Clin Nutr 2024; 120:294-309. [PMID: 39097343 DOI: 10.1016/j.ajcnut.2024.04.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 04/04/2024] [Accepted: 04/22/2024] [Indexed: 08/05/2024] Open
Abstract
BACKGROUND Cardiovascular diseases (CVD) remain the leading cause of mortality globally, and the scarcity of scientific evidence regarding the impact of ketogenic diets on CVD risk factors necessitates urgent attention and redress. OBJECTIVES This meta-analysis evaluates the impact of the ketogenic diet on CVD risk factors compared with control diets through randomized controlled trials (RCTs). METHODS The study was registered in advance in the PROSPERO database (CRD42023491853). A systematic search was conducted across PubMed, Web of Science, EMBASE, and Cochrane Library to identify relevant RCTs. Fixed and random effects were employed to calculate the mean differences and 95% confidence intervals (CIs) for changes in CVD risk factors pre- and postketogenic diet intervention. RESULTS A total of 27 RCTs with 1278 participants were analyzed. The ketogenic diet intervention presented increase in total cholesterol (mean differences: 0.36 mmol/L; 95% CI: 0.15, 0.57; I2: 85.1%), low-density lipoprotein cholesterol (mean differences: 0.35 mmol/L; 95% CI: 0.20, 0.50; I2: 73.9%) and high-density lipoprotein cholesterol (mean differences: 0.16 mmol/L; 95% CI: 0.09, 0.23; I2: 86.7%) concentrations. Reductions were observed in the triglyceride (mean differences: -0.20 mmol/L; 95% CI: -0.29, -0.11; I2: 72.2%), blood glucose (mean differences: -0.18 mmol/L; 95% CI: -0.33, -0.02; I2: 76.4%), blood insulin (mean differences: -8.32 pmol/L; 95% CI: -14.52, -2.12; I2: 81.5%), diastolic blood pressure (mean differences: -1.41 mmHg; 95% CI: -2.57, -0.26; I2: 49.1%), weight (mean differences: -2.59 kg; 95% CI: -3.90, -1.28; I2: 87.4%), and body mass index (mean differences: -1.59 kg/m2; 95% CI: -2.32, -0.86; I2: 84.5%) concentrations after implementing ketogenic diets. CONCLUSIONS Although the ketogenic diet demonstrates benefits in terms of triglyceride, blood pressure, weight, and glycemic control, its impact on CVD risk factors, especially the elevated total cholesterol and low-density lipoprotein cholesterol concentrations, warrants a cautious approach.
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Affiliation(s)
- Zixuan Wang
- Clinical Metabolomics Center, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Tu Chen
- Clinical Metabolomics Center, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Sihai Wu
- Surgical Intensive Care Unit, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Xuesi Dong
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Ming Zhang
- Surgical Intensive Care Unit, Children's Hospital of Nanjing Medical University, Nanjing, China.
| | - Gaoxiang Ma
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China; Department of Cardiology, Pukou Hospital of Chinese Medicine affiliated to China Pharmaceutical University, Nanjing, China.
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Ahmad Y, Seo DS, Jang Y. Metabolic Effects of Ketogenic Diets: Exploring Whole-Body Metabolism in Connection with Adipose Tissue and Other Metabolic Organs. Int J Mol Sci 2024; 25:7076. [PMID: 39000187 PMCID: PMC11241756 DOI: 10.3390/ijms25137076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/17/2024] [Accepted: 06/24/2024] [Indexed: 07/16/2024] Open
Abstract
The ketogenic diet (KD) is characterized by minimal carbohydrate, moderate protein, and high fat intake, leading to ketosis. It is recognized for its efficiency in weight loss, metabolic health improvement, and various therapeutic interventions. The KD enhances glucose and lipid metabolism, reducing triglycerides and total cholesterol while increasing high-density lipoprotein levels and alleviating dyslipidemia. It significantly influences adipose tissue hormones, key contributors to systemic metabolism. Brown adipose tissue, essential for thermogenesis and lipid combustion, encounters modified UCP1 levels due to dietary factors, including the KD. UCP1 generates heat by uncoupling electron transport during ATP synthesis. Browning of the white adipose tissue elevates UCP1 levels in both white and brown adipose tissues, a phenomenon encouraged by the KD. Ketone oxidation depletes intermediates in the Krebs cycle, requiring anaplerotic substances, including glucose, glycogen, or amino acids, for metabolic efficiency. Methylation is essential in adipogenesis and the body's dietary responses, with DNA methylation of several genes linked to weight loss and ketosis. The KD stimulates FGF21, influencing metabolic stability via the UCP1 pathways. The KD induces a reduction in muscle mass, potentially involving anti-lipolytic effects and attenuating proteolysis in skeletal muscles. Additionally, the KD contributes to neuroprotection, possesses anti-inflammatory properties, and alters epigenetics. This review encapsulates the metabolic effects and signaling induced by the KD in adipose tissue and major metabolic organs.
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Affiliation(s)
- Yusra Ahmad
- Department of Biology and Chemistry, Changwon National University, Changwon 51140, Republic of Korea
| | - Dong Soo Seo
- Department of Biology and Chemistry, Changwon National University, Changwon 51140, Republic of Korea
| | - Younghoon Jang
- Department of Biology and Chemistry, Changwon National University, Changwon 51140, Republic of Korea
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Wang H, Ma Q, Chen Y, Luo L, Ye J, Zhong B. Optimized strategy among diet, exercise, and pharmacological interventions for nonalcoholic fatty liver disease: A network meta-analysis of randomized controlled trials. Obes Rev 2024; 25:e13727. [PMID: 38509775 DOI: 10.1111/obr.13727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 01/23/2024] [Accepted: 01/30/2024] [Indexed: 03/22/2024]
Abstract
BACKGROUND Emerging treatment methods, including exercise, diet, and drugs, for nonalcoholic fatty liver disease have been proposed. However, the differences in their efficacy have not been determined. We aimed to compare the effects of these treatments excluding surgery via a systematic review and network meta-analysis of randomized controlled trials. DATA SOURCE The data sources included PubMed, Embase, Web of Science and Cochrane up to February 1st, 2023. The endpoints consisted of body mass index (BMI), serum markers of metabolism and liver injury markers, liver fat content, and stiffness. RESULTS A total of 174 studies with 10,183 patients were included in this meta-analysis. In terms of improving BMI, Pan-agonist of peroxisome proliferator-activated receptors (PPAR) is the best treatment with the highest SUCRA (surface under the cumulative ranking) of 84.8% (mean = -3.40, 95% CI -5.55, -1.24) by the comparative effectiveness ranking. GLP-1 (glucagon-like peptide-1) has the best effect in improving the liver fat content based on the MRI-PDFF, steatosis score (SUCRA 99.7%, mean = -2.19, 95% CI -2.90, -1.48) and ballooning score (SUCRA 61.2%, mean = -0.82, 95% CI -4.46, 2.83). CONCLUSIONS Pan-agonist of PPAR was the most efficacious regimen in lowering BMIs, whereas GLP-1R agonists achieved the highest efficacy of steatosis improvement in this network meta-analysis.
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Affiliation(s)
- Hao Wang
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of Infectious Diseases, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Qianqian Ma
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of Infectious Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Youpeng Chen
- Department of Infectious Diseases, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Ling Luo
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Junzhao Ye
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Bihui Zhong
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Rinaldi R, De Nucci S, Donghia R, Donvito R, Cerabino N, Di Chito M, Penza A, Mongelli FP, Shahini E, Zappimbulso M, Pesole PL, Coletta S, Triggiani V, Cozzolongo R, Giannelli G, De Pergola G. Gender Differences in Liver Steatosis and Fibrosis in Overweight and Obese Patients with Metabolic Dysfunction-Associated Steatotic Liver Disease before and after 8 Weeks of Very Low-Calorie Ketogenic Diet. Nutrients 2024; 16:1408. [PMID: 38794646 PMCID: PMC11123918 DOI: 10.3390/nu16101408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/03/2024] [Accepted: 05/05/2024] [Indexed: 05/26/2024] Open
Abstract
Obesity and metabolic syndrome are linked to steatotic liver disease (SLD), the most common form of chronic liver disease. Lifestyle modifications and dieting are strategies that can prevent metabolic dysfunction-associated steatotic liver disease (MASLD). The very low-calorie ketogenic diet (VLCKD) is a helpful treatment for MASLD and has been recommended for people affected by obesity; we evaluated the effect of gender on steatosis and fibrosis in a cohort of 112 overweight or obese patients undergoing an eight-week treatment with a VLCKD. Differences between the genders in terms of anthropometric measures, body composition, and metabolic indicators were examined before, during, and after the nutritional intervention. At baseline, there were significant differences between men and women in terms of anthropometric parameters, blood pressure, Homeostatic Model Assessment for Insulin Resistance (HOMA-IR), fasting insulin, hepatic markers, and lipid profile. Men had considerably higher levels of liver steatosis (measured by CAP) and liver stiffness (measured by E) under basal conditions than women. After the VLCKD, there were reductions in both genders of controlled attenuation parameter (CAP), body weight, body mass index (BMI), waist circumference, systolic and diastolic blood pressure, insulin resistance, fat mass (FM), free fat mass (FFM), and fasting blood glucose, insulin, glycated hemoglobin (HbA1c), triglycerides, total cholesterol, low-density lipoprotein (LDL) cholesterol, alanine transaminase (ALT), gamma-glutamyl transferase (γGT), and uric acid levels. Only in men, liver stiffness, aspartate aminotransferase (AST), creatinine, and C-reactive protein (CRP) levels significantly decreased. Moreover, men had significantly greater levels of liver steatosis: the male gender featured an increase of 23.96 points of the Fibroscan CAP. Men exhibited higher levels of steatosis and fibrosis than women, and these differences persist despite VLCKD. These gender-specific variations in steatosis and fibrosis levels could be caused by hormonal and metabolic factors, suggesting that different therapeutic strategies might be required depending on the gender.
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Affiliation(s)
- Roberta Rinaldi
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
| | - Sara De Nucci
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
| | - Rossella Donghia
- Laboratory of Epidemiology and Statistics, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy;
| | - Rosanna Donvito
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
| | - Nicole Cerabino
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
| | - Martina Di Chito
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
| | - Alice Penza
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
| | - Francesco Pio Mongelli
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
| | - Endrit Shahini
- Department of Gastroenterology, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (E.S.); (M.Z.); (R.C.)
| | - Marianna Zappimbulso
- Department of Gastroenterology, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (E.S.); (M.Z.); (R.C.)
| | - Pasqua Letizia Pesole
- Core Facility Biobank, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (P.L.P.); (S.C.)
| | - Sergio Coletta
- Core Facility Biobank, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (P.L.P.); (S.C.)
| | - Vincenzo Triggiani
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari “Aldo Moro”, Piazza Giulio Cesare 11, 70124 Bari, Italy;
| | - Raffaele Cozzolongo
- Department of Gastroenterology, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (E.S.); (M.Z.); (R.C.)
| | - Gianluigi Giannelli
- Scientific Direction, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy;
| | - Giovanni De Pergola
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, Castellana Grotte, 70013 Bari, Italy; (R.R.); (S.D.N.); (R.D.); (N.C.); (M.D.C.); (A.P.); (F.P.M.)
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Guo W, Cao H, Shen Y, Li W, Wang W, Cheng L, Cai M, Xu F. Role of liver FGF21-KLB signaling in ketogenic diet-induced amelioration of hepatic steatosis. Nutr Diabetes 2024; 14:18. [PMID: 38609395 PMCID: PMC11014968 DOI: 10.1038/s41387-024-00277-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 04/01/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND The effectiveness of ketogenic diet (KD) in ameliorating fatty liver has been established, although its mechanism is under investigation. Fibroblast growth factor 21 (FGF21) positively regulates obesity-associated metabolic disorders and is elevated by KD. FGF21 conventionally initiates its intracellular signaling via receptor β-klotho (KLB). However, the mechanistic role of FGF21-KLB signaling for KD-ameliorated fatty liver remains unknown. This study aimed to delineate the critical role of FGF21 signaling in the ameliorative effects of KD on hepatic steatosis. METHODS Eight-week-old C57BL/6 J mice were fed a chow diet (CD), a high-fat diet (HFD), or a KD for 16 weeks. Adeno-associated virus-mediated liver-specific KLB knockdown mice and control mice were fed a KD for 16 weeks. Phenotypic assessments were conducted during and after the intervention. We investigated the mechanism underlying KD-alleviated hepatic steatosis using multi-omics and validated the expression of key genes. RESULTS KD improved hepatic steatosis by upregulating fatty acid oxidation and downregulating lipogenesis. Transcriptional analysis revealed that KD dramatically activated FGF21 pathway, including KLB and fibroblast growth factor receptor 1 (FGFR1). Impairing liver FGF21 signaling via KLB knockdown diminished the beneficial effects of KD on ameliorating fatty liver, insulin resistance, and regulating lipid metabolism. CONCLUSION KD demonstrates beneficial effects on diet-induced metabolic disorders, particularly on hepatic steatosis. Liver FGF21-KLB signaling plays a critical role in the KD-induced amelioration of hepatic steatosis.
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Affiliation(s)
- Wanrong Guo
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
- Guangzhou Municipal Key Laboratory of Mechanistic and Translational Obesity Research, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Medical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Huanyi Cao
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
- Department of Endocrinology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Southern Medical University, Guangzhou, China
| | - Yunfeng Shen
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Wuguo Li
- Animal Experiment Center, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Wei Wang
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Lidan Cheng
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Mengyin Cai
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China
- Guangzhou Municipal Key Laboratory of Mechanistic and Translational Obesity Research, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Fen Xu
- Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
- Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China.
- Guangzhou Municipal Key Laboratory of Mechanistic and Translational Obesity Research, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
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Amini MR, Askarpour M, Ghalandari H, Gholizadeh M, Pouraram H. Effect of ketogenic diet on blood pressure: A GRADE-Assessed systematic review and meta-analysis of randomized controlled trials. Nutr Metab Cardiovasc Dis 2024; 34:823-837. [PMID: 38310076 DOI: 10.1016/j.numecd.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 02/05/2024]
Abstract
AIMS Cardiovascular diseases (CVDs) are major causes of mortality around the world. High blood pressure (BP) or hypertension is one of the most significant predisposing factors to CVDs. Ketogenic diets (KDs) have been the center of attention for their possible health benefits. The aim of this analysis is to study the impact of KDs on BP through the existing literature. DATA SYNTHESIS We investigated the impact of KDs on systolic and diastolic blood pressures (SBP and DBP) conducted in the format of randomized controlled trials (RCTs). Four online databases (PubMed/Medline, SCOPUS, Cochrane Library, and Google Scholar) were searched from inception up to November 2022. Subgroup analyses were carried out to find the sources of heterogeneities. Twenty-three RCTs with 1664 participants were identified. KDs did not exert any significant impacts on SBP (WMD: -0.87 mmHg, 95% CI: -2.05, 0.31) nor DBP (WMD: -0.11 mmHg, 95% CI -1.14, 0.93). Subgroup analyses did not reveal any further information. Also, non-linear dose-response analysis could not detect any associations between the percentage of calorie intake from fat in the KD format and BP levels. CONCLUSION KDs do not seem to be effective in improving BP. Nonetheless, further investigations are recommended to examine the proportion of fat intake needed to induce favorable clinical impacts.
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Affiliation(s)
- Mohammad Reza Amini
- Student Research Committee, Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition & Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Nutrition and Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Moein Askarpour
- Student Research Committee, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamid Ghalandari
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Gholizadeh
- Department of Clinical Nutrition, Faculty of Nutrition Sciences and Food Industries, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Pouraram
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran.
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11
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Dobbie LJ, Burgess J, Hamid A, Nevitt SJ, Hydes TJ, Alam U, Cuthbertson DJ. Effect of a Low-Calorie Dietary Intervention on Liver Health and Body Weight in Adults with Metabolic-Dysfunction Associated Steatotic Liver Disease (MASLD) and Overweight/Obesity: A Systematic Review and Meta-Analysis. Nutrients 2024; 16:1030. [PMID: 38613063 PMCID: PMC11013586 DOI: 10.3390/nu16071030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 03/25/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
INTRODUCTION Metabolic-dysfunction Associated Steatotic Liver Disease (MASLD) is a common cause of chronic liver disease. This review assessed the efficacy of a Low-Calorie Diet (LCD) on liver health and body weight in people living with MASLD and obesity. METHODS The study was registered with PROSPERO (CRD42021296501), and a literature search was conducted using multiple databases. The key inclusion criteria were randomised controlled trials or cohort studies, obesity/overweight and MASLD. Two authors screened abstracts, reviewed full texts and performed data extraction and quality assessment. The primary outcome was the change in the serum ALT, and secondary outcomes included the changes in the serum AST, intrahepatic lipid content (IHL), quantified non-invasively via MRI/MRS, and body weight. RESULTS Fifteen studies were included. The LCD reduced body weight by 9.1 kg versus the control (95%CI: -12.4, -5.8) but not serum ALT (-5.9 IU/L, -13.9, 2.0). Total Dietary Replacement (TDR) reduced IHL by -9.1% vs. the control (-15.6%, -2.6%). The Mediterranean-LCD for ≥12 months reduced ALT (-4.1 IU/L, -7.6, -0.5) and for 24 months reduced liver stiffness versus other LCDs. The Green-Mediterranean-LCD reduced IHL, independent of body weight. Limited studies assessed those of Black or Asian ethnicity, and there was heterogeneity in the methods assessing the liver fat content and fibrosis. CONCLUSIONS In people with MASLD and obesity, an LCD intervention reduces IHL and body weight. Trials should focus on the recruitment of Black and Asian ethnicity participants.
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Affiliation(s)
- Laurence J. Dobbie
- Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L9 7AL, UK; (L.J.D.)
- Department of Diabetes & Endocrinology, Guys Hospital, Guy’s and St Thomas’ NHS Foundation Trust, London SE1 9RT, UK
| | - Jamie Burgess
- Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L9 7AL, UK; (L.J.D.)
- University Hospital Aintree, Liverpool University Hospitals NHS Foundation Trust, Liverpool L9 7AL, UK
| | - Azlinda Hamid
- Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L9 7AL, UK; (L.J.D.)
| | - Sarah J. Nevitt
- Department of Health Data Science, Institute of Population Health, University of Liverpool, Liverpool L3 5TR, UK;
- Centre for Reviews and Dissemination, University of York, York YO10 5DD, UK
| | - Theresa J. Hydes
- Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L9 7AL, UK; (L.J.D.)
- University Hospital Aintree, Liverpool University Hospitals NHS Foundation Trust, Liverpool L9 7AL, UK
| | - Uazman Alam
- Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L9 7AL, UK; (L.J.D.)
- University Hospital Aintree, Liverpool University Hospitals NHS Foundation Trust, Liverpool L9 7AL, UK
| | - Daniel J. Cuthbertson
- Department of Cardiovascular and Metabolic Medicine, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L9 7AL, UK; (L.J.D.)
- University Hospital Aintree, Liverpool University Hospitals NHS Foundation Trust, Liverpool L9 7AL, UK
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12
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Xing NN, Ren F, Yang H. Effects of ketogenic diet on weight loss parameters among obese or overweight patients with polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled trails. Food Nutr Res 2024; 68:9835. [PMID: 38571924 PMCID: PMC10989237 DOI: 10.29219/fnr.v68.9835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/13/2023] [Accepted: 09/21/2023] [Indexed: 04/05/2024] Open
Abstract
Aim To evaluate how effective a low carbohydrate ketogenic diet (KD) is for changing key physical measurements such as weight, waist circumference (WC), body mass index (BMI), and fat mass (FM) in women with polycystic ovary syndrome (PCOS) who were obese or overweight. Methods Several online databases, including PubMed, Scopus, EMBASE, Cochrane Library, and Web of Science (WOS), were searched systematically to find relevant randomized controlled trials (RCTs) up until June 2023. The Q-test and I2 statistics were used to assess the level of heterogeneity among the included studies. The data were then combined using either a fixed or random effects model and presented as a weighted mean difference (WMD) along with a 95% confidence interval (CI). Results Of the 682 citations, 11 RCTs were included. The pooled results showed a significant decrease in the WMD of weight levels [WMD = -9.13 kg; 95% CI, -11.88, -6.39, P < 0.001; I2 = 87.23%] following KD. Moreover, KD significantly reduced BMI levels [WMD = -2.93 kg/m2; 95% CI, -3.65, -2.21, P < 0.001; I2 = 78.81%] compared to the controls. Patients with PCOS received KD demonstrated significant decrease in WC [WMD = -7.62 cm; 95% CI, -10.73, -4.50, P < 0.001; I2 = 89.17%] and FM [WMD = -5.32 kg; 95% CI, -7.29, -3.36, P < 0.001; I2 = 83.97%]. Conclusion KD was associated with lower weight loss (WL) parameters, including weight, BMI, WC, and FM, in obese or overweight women with PCOS, highlighting the significance of physicians and nurses in taking care of the nutritional needs of overweight/obese patients with PCOS.
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Affiliation(s)
- Nan-nan Xing
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Fang Ren
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Hui Yang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China
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13
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Deng Y, Liu X, Sun Y, Zhou L, Li Q, Lei Z, Yang F, Chen L, Zhang C, Tan W, Jin X, Han Z, Xu H, Wang Q, Nie Q, Yi H, Bao W, Rong S. Effects of time-restricted eating on intrahepatic fat and metabolic health among patients with nonalcoholic fatty liver disease. Obesity (Silver Spring) 2024; 32:494-505. [PMID: 38228496 DOI: 10.1002/oby.23965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/26/2023] [Accepted: 11/02/2023] [Indexed: 01/18/2024]
Abstract
OBJECTIVE The study's objective was to explore whether early time-restricted eating (eTRE) and late time-restricted eating (lTRE) have different impacts on intrahepatic fat and metabolic health among patients with nonalcoholic fatty liver disease (NAFLD). METHODS This is an 8-week, randomized, parallel-arm, open-label trial. Forty eligible patients were randomly assigned to eTRE (eating between 8:00 a.m. and 4:00 p.m.) or lTRE (eating between 12:00 p.m. and 8:00 p.m.). The primary outcome was the change of intrahepatic fat measured by magnetic resonance image-derived proton density fat fraction. Secondary outcomes included changes in weight, body composition, liver function, and cardiometabolic factors. RESULTS Forty participants who underwent randomization completed the trial (mean age: 38.25 years). The eTRE group had a -3.24% absolute reduction of intrahepatic fat (95% CI: -4.55% to -1.92%) and there was a -3.51% absolute reduction for the lTRE group (95% CI: -5.10% to -1.92%). Changes in intrahepatic fat were not statistically different between the two groups. Both the eTRE and lTRE groups had similar and significant reductions in weight, visceral fat, subcutaneous fat, liver enzymes, and glucose regulatory indicators. CONCLUSIONS Among patients with NAFLD, both eTRE and lTRE induced significant reductions in intrahepatic fat and improvements in body composition, liver function, and metabolic health with similar magnitude. These findings suggest that eTRE and lTRE are comparable and feasible strategies for NAFLD management.
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Affiliation(s)
- Yan Deng
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Xiaoming Liu
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuzhe Sun
- BGI Research, Beijing, China
- BGI Research, Shenzhen, China
| | - Li Zhou
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Qiang Li
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ziqiao Lei
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fan Yang
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liangkai Chen
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chen Zhang
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Tan
- Geriatric Hospital Affiliated with Wuhan University of Science and Technology, Wuhan, China
| | - Xin Jin
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Zhuang Han
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Huiyang Xu
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Qing Wang
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Qi Nie
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Haoran Yi
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
| | - Wei Bao
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Shuang Rong
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Public Health, Wuhan University of Science and Technology, Wuhan, China
- Department of Food and Nutrition Health, School of Public Health, Wuhan University, Wuhan, China
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14
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Szendi K, Murányi E, Hunter N, Németh B. Methodological Challenges and Confounders in Research on the Effects of Ketogenic Diets: A Literature Review of Meta-Analyses. Foods 2024; 13:248. [PMID: 38254549 PMCID: PMC10814162 DOI: 10.3390/foods13020248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/04/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
Several meta-analyses have found a positive association between a popular type of "fad diet", ketogenic diets, and their effect on anthropometric and blood parameters. However, the non-specific inclusion criteria for meta-analyses may lead to incorrect conclusions. The aim of this literature review is to highlight the main confounders and methodological pitfalls of meta-analyses on ketogenic diets by inspecting the presence of key inclusion criteria. The PubMed, Embase, and Web of Science databases and the Cochrane Database of Systematic Reviews were searched for meta-analyses. Most meta-analyses did not define the essential parameters of a ketogenic diet (i.e., calories, macronutrient ratio, types of fatty acids, ketone bodies, etc.) as inclusion criteria. Of the 28 included meta-analyses, few addressed collecting real, re-measured nutritional data from the ketogenic diet and control groups in parallel with the pre-designed nutritional data. Most meta-analyses reported positive results in favor of ketogenic diets, which can result in erroneous conclusions considering the numerous methodological pitfalls and confounders. Well-designed clinical trials with comparable results and their meta-analyses are needed. Until then, medical professionals should not recommend ketogenic diets as a form of weight loss when other well-known dietary options have been shown to be healthy and effective.
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Affiliation(s)
- Katalin Szendi
- Department of Public Health Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
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15
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Nelson AB, Queathem ED, Puchalska P, Crawford PA. Metabolic Messengers: ketone bodies. Nat Metab 2023; 5:2062-2074. [PMID: 38092961 DOI: 10.1038/s42255-023-00935-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 10/20/2023] [Indexed: 12/21/2023]
Abstract
Prospective molecular targets and therapeutic applications for ketone body metabolism have increased exponentially in the past decade. Initially considered to be restricted in scope as liver-derived alternative fuel sources during periods of carbohydrate restriction or as toxic mediators during diabetic ketotic states, ketogenesis and ketone bodies modulate cellular homeostasis in multiple physiological states through a diversity of mechanisms. Selective signalling functions also complement the metabolic fates of the ketone bodies acetoacetate and D-β-hydroxybutyrate. Here we discuss recent discoveries revealing the pleiotropic roles of ketone bodies, their endogenous sourcing, signalling mechanisms and impact on target organs, and considerations for when they are either stimulated for endogenous production by diets or pharmacological agents or administered as exogenous wellness-promoting agents.
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Affiliation(s)
- Alisa B Nelson
- Division of Molecular Medicine, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Eric D Queathem
- Division of Molecular Medicine, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Patrycja Puchalska
- Division of Molecular Medicine, Department of Medicine, University of Minnesota, Minneapolis, MN, USA.
| | - Peter A Crawford
- Division of Molecular Medicine, Department of Medicine, University of Minnesota, Minneapolis, MN, USA.
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN, USA.
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16
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Cortez NE, Lanzi CR, Vahmani P, Matsukuma K, Mackenzie GG. Hepatic safety profile of pancreatic cancer‑bearing mice fed a ketogenic diet in combination with gemcitabine. Oncol Lett 2023; 26:479. [PMID: 37818128 PMCID: PMC10561147 DOI: 10.3892/ol.2023.14067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 09/06/2023] [Indexed: 10/12/2023] Open
Abstract
Ketogenic diets (KDs) are actively being evaluated for their potential anticancer effects. Although KDs are generally considered safe, their safety profile when combined with chemotherapy remains unknown. It is known that a KD enhances the anticancer effect of gemcitabine (2',2'-difluoro-2'-deoxycytidine) in LSL-KrasLSL-G12D/+Trp53R172H/+Pdx-1-Cre (KPC) tumor-bearing mice. In the present study, whether a KD in combination with gemcitabine affected the liver safety profile in KPC mice was evaluated. For this purpose, male and female pancreatic tumor-bearing KPC mice were allocated to a control diet (CD; % kcal: 20% fat, 65% carbohydrate, 15% protein) + gemcitabine [control plus gemcitabine group (CG)] or a KD (% kcal: 84% fat, 15% protein, 1% carbohydrate) + gemcitabine [ketogenic plus gemcitabine group (KG)] for two months. After two months of treatment, no significant differences in body weight were observed between CGs and KGs. Moreover, the KD did not significantly alter the serum protein expression levels of liver enzymes, including aspartate aminotransferase, alanine aminotransferase and alkaline phosphatase. In addition, the KD did not alter markers of liver-lipid accumulation as well as serum cholesterol and triglyceride levels, compared with the CG-treated group. Upon histologic examination, steatosis was rare, with no notable differences between treatment groups. When examining liver fatty acid composition, KD treatment significantly increased the content of saturated fatty acids and significantly decreased levels of cis-monounsaturated fatty acids compared with the CG. Finally, the KD did not affect liver markers of inflammation and oxidative stress, nor the protein expression levels of enzymes involved in ketone bodies, such as 3-hydroxy-3-methylglutaryl-CoA lyase and hidroximetilglutaril-CoA sintasa, and glucose metabolism, such as hexokinase 2, pyruvate dehydrogenase and phosphofructokinase. In summary, a KD in combination with gemcitabine appears to be safe, with no apparent hepatotoxicity and these data support the further evaluation of a KD as an adjuvant dietary treatment for pancreatic cancer.
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Affiliation(s)
- Natalia E. Cortez
- Department of Nutrition, University of California, Davis, CA 95616, USA
| | | | - Payam Vahmani
- Department of Animal Science, University of California, Davis, CA 95616, USA
| | - Karen Matsukuma
- Department of Pathology and Laboratory Medicine, Davis Medical Center, University of California, Sacramento, CA 95817, USA
- University of California Davis Comprehensive Cancer Center, University of California, Sacramento, CA 95817, USA
| | - Gerardo G. Mackenzie
- Department of Nutrition, University of California, Davis, CA 95616, USA
- University of California Davis Comprehensive Cancer Center, University of California, Sacramento, CA 95817, USA
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Li S, Yuan S, Lin G, Zhang J. Effects of a two meals-a-day ketogenic diet on newly diagnosed obese patients with type 2 diabetes mellitus: A retrospective observational study. Medicine (Baltimore) 2023; 102:e35753. [PMID: 37904380 PMCID: PMC10615408 DOI: 10.1097/md.0000000000035753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/02/2023] [Indexed: 11/01/2023] Open
Abstract
To investigate the effects of a two-meals-a-day energy-restricted ketogenic diet (KD) on newly diagnosed obese patients with type 2 diabetes mellitus. In total, 60 obese patients with newly diagnosed type 2 diabetes mellitus were divided into 2 groups: 1 group followed a 2-meals-a-day KD and the other group followed a conventional diabetic diet. Changes in weight, blood glucose, blood lipids, insulin resistance, and uric acid levels were observed before and after 2 months of adhering to the respective diets under energy restriction. Both groups showed significant reductions in weight, waist circumference, body mass index, total cholesterol, triglycerides, high-density lipoproteins, low-density lipoproteins, fasting blood glucose, fasting insulin, and glycated hemoglobin (P < .05). The twice-daily KD group showed more significant improvements in these parameters compared to the conventional diabetic diet group. In addition, the 2-meals-a-day KD group showed a slight increase in uric acid levels compared to the conventional diabetic diet control group (P < .05). The 2-meals-a-day KD can significantly improve weight, blood glucose, and lipid control in newly diagnosed obese patients with type 2 diabetes mellitus.
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Affiliation(s)
- Sumei Li
- Department of Endocrinology, The First Hospital of Putian City, Teaching Hospital, Fujian Medical University, Putian, People’s Republic of China
| | - Shouping Yuan
- Department of Endocrinology, The First Hospital of Putian City, Teaching Hospital, Fujian Medical University, Putian, People’s Republic of China
| | - Guoxin Lin
- Department of Endocrinology, The First Hospital of Putian City, Teaching Hospital, Fujian Medical University, Putian, People’s Republic of China
| | - Jintian Zhang
- Department of Pathology, Putian University, Fujian, People’s Republic of China
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18
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De Nucci S, Bonfiglio C, Donvito R, Di Chito M, Cerabino N, Rinaldi R, Sila A, Shahini E, Giannuzzi V, Pesole PL, Coletta S, Lanzilotta E, Piazzolla G, Cozzolongo R, Giannelli G, De Pergola G. Effects of an Eight Week Very Low-Calorie Ketogenic Diet (VLCKD) on White Blood Cell and Platelet Counts in Relation to Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD) in Subjects with Overweight and Obesity. Nutrients 2023; 15:4468. [PMID: 37892542 PMCID: PMC10610501 DOI: 10.3390/nu15204468] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023] Open
Abstract
Obesity and metabolic dysfunction-associated steatotic liver disease (MASLD) are frequently associated conditions characterized by low-grade inflammation. Very low-calorie ketogenic diet (VLCKD) strategies are commonly used to simultaneously obtain weight loss and an improvement of liver steatosis. We evaluated the efficacy of 8 weeks' VLCKD in decreasing the white blood cell (WBC) and platelet (PLT) counts, as well as liver steatosis and fibrosis, diagnosed using transient elastography (FibroScan). Metabolic and anthropometric parameters commonly associated with MASLD were also evaluated. This study included 87 participants; 58 women and 29 men aged between 18 and 64 years with overweight (18%) or obesity (82%), but not taking any medication. Anthropometric measurements, bioimpedance analysis, and biochemical assays were performed before and after the dietary intervention. BMI (kg/m2) (p-value < 0.001), waist circumference (cm) (p-value < 0.001), and fat mass (kg) (p-value < 0.001) were significantly decreased following VLCKD. After VLCKD, the FibroScan parameter CAP (db/m), which measures the accumulation of fatty liver, significantly decreased (p-value < 0.001), as did liver stiffness (kPA), the FibroScan parameter quantifying liver fibrosis (p-value < 0.05). Seemingly, WBC (p-value < 0.001) and PLT (p-value < 0.001) counts were lowered by VLCKD in the whole group; however, the decrease in WBC and platelet counts were significant only in patients with steatosis (CAP ≥ 215 dB/m). Fasting blood glucose (p-value < 0.001), insulin (p-value < 0.001), HbA1c (p-value < 0.001), triglycerides (p-value < 0.001), total cholesterol (p-value < 0.001), LDL-cholesterol (p-value < 0.001), HDL-cholesterol (p-value < 0.001); γGT (p-value < 0.001) blood levels and insulin resistance (as measured by HOMAIR) (p-value < 0.001); and systolic (p-value < 0.001), and diastolic (p-value < 0.001) blood pressure levels, were all significantly lower after VLCKD. In contrast, blood levels of vitamin D were higher following the diet (p-value < 0.001). We conclude that treating subjects with overweight and obesity with VLCKD is followed by a simultaneous reduction in WBCs and platelets, the expression of low-grade inflammation, and of liver steatosis and fibrosis. Therefore, we can hypothesize that VLCKD decreases general and liver low-grade inflammation, thus improving liver health.
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Affiliation(s)
- Sara De Nucci
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, 70013 Castellana Grotte, Italy (R.R.)
| | - Caterina Bonfiglio
- Laboratory of Epidemiology and Statistics, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy
| | - Rosanna Donvito
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, 70013 Castellana Grotte, Italy (R.R.)
| | - Martina Di Chito
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, 70013 Castellana Grotte, Italy (R.R.)
| | - Nicole Cerabino
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, 70013 Castellana Grotte, Italy (R.R.)
| | - Roberta Rinaldi
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, 70013 Castellana Grotte, Italy (R.R.)
| | - Annamaria Sila
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, 70013 Castellana Grotte, Italy (R.R.)
| | - Endrit Shahini
- Department of Gastroenterology, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (E.S.)
| | - Vito Giannuzzi
- Department of Gastroenterology, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (E.S.)
| | - Pasqua Letizia Pesole
- Core Facility Biobank, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy
| | - Sergio Coletta
- Core Facility Biobank, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy
| | - Elsa Lanzilotta
- Laboratory of Clinical Pathology, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy
| | - Giuseppina Piazzolla
- Interdisciplinary Department of Medicine, School of Medicine, University of Bari “Aldo Moro”, Piazza Giulio Cesare 11, 70124 Bari, Italy;
| | - Raffaele Cozzolongo
- Department of Gastroenterology, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy; (E.S.)
| | - Gianluigi Giannelli
- Scientific Direction, National Institute of Gastroenterology “Saverio de Bellis”, IRCCS Hospital, Castellana Grotte, 70013 Bari, Italy;
| | - Giovanni De Pergola
- Center of Nutrition for the Research and the Care of Obesity and Metabolic Diseases, National Institute of Gastroenterology IRCCS “Saverio de Bellis”, 70013 Castellana Grotte, Italy (R.R.)
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Wang H, Lv X, Zhao S, Yuan W, Zhou Q, Sadiq FA, Zhao J, Lu W, Wu W. Weight Loss Promotion in Individuals with Obesity through Gut Microbiota Alterations with a Multiphase Modified Ketogenic Diet. Nutrients 2023; 15:4163. [PMID: 37836447 PMCID: PMC10574165 DOI: 10.3390/nu15194163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/13/2023] [Accepted: 09/19/2023] [Indexed: 10/15/2023] Open
Abstract
The occurrence of obesity and related metabolic disorders is rising, necessitating effective long-term weight management strategies. With growing interest in the potential role of gut microbes due to their association with responses to different weight loss diets, understanding the mechanisms underlying the interactions between diet, gut microbiota, and weight loss remains a challenge. This study aimed to investigate the potential impact of a multiphase dietary protocol, incorporating an improved ketogenic diet (MDP-i-KD), on weight loss and the gut microbiota. Using metagenomic sequencing, we comprehensively analyzed the taxonomic and functional composition of the gut microbiota in 13 participants before and after a 12-week MDP-i-KD intervention. The results revealed a significant reduction in BMI (9.2% weight loss) among obese participants following the MDP-i-KD intervention. Machine learning analysis identified seven key microbial species highly correlated with MDP-i-KD, with Parabacteroides distasonis exhibiting the highest response. Additionally, the co-occurrence network of the gut microbiota in post-weight-loss participants demonstrated a healthier state. Notably, metabolic pathways related to nucleotide biosynthesis, aromatic amino acid synthesis, and starch degradation were enriched in pre-intervention participants and positively correlated with BMI. Furthermore, species associated with obesity, such as Blautia obeum and Ruminococcus torques, played pivotal roles in regulating these metabolic activities. In conclusion, the MDP-i-KD intervention may assist in weight management by modulating the composition and metabolic functions of the gut microbiota. Parabacteroides distasonis, Blautia obeum, and Ruminococcus torques could be key targets for gut microbiota-based obesity interventions.
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Affiliation(s)
- Hongchao Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (H.W.); (X.L.); (S.Z.); (W.Y.); (J.Z.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Xinchen Lv
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (H.W.); (X.L.); (S.Z.); (W.Y.); (J.Z.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Sijia Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (H.W.); (X.L.); (S.Z.); (W.Y.); (J.Z.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Weiwei Yuan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (H.W.); (X.L.); (S.Z.); (W.Y.); (J.Z.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Qunyan Zhou
- Department of Nutriology, The Affiliated Wuxi People’s Hospital of Nanjing Medical University, No. 299, Qingyang Road, Wuxi 214023, China;
| | - Faizan Ahmed Sadiq
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Technology & Food Sciences Unit, 9090 Melle, Belgium;
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (H.W.); (X.L.); (S.Z.); (W.Y.); (J.Z.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Wenwei Lu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (H.W.); (X.L.); (S.Z.); (W.Y.); (J.Z.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Wenjun Wu
- Department of Endocrinology, The Affiliated Wuxi People’s Hospital of Nanjing Medical University, No. 299, Qingyang Road, Wuxi 214023, China
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20
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Camajani E, Feraco A, Verde L, Moriconi E, Marchetti M, Colao A, Caprio M, Muscogiuri G, Barrea L. Ketogenic Diet as a Possible Non-pharmacological Therapy in Main Endocrine Diseases of the Female Reproductive System: A Practical Guide for Nutritionists. Curr Obes Rep 2023; 12:231-249. [PMID: 37405618 PMCID: PMC10482777 DOI: 10.1007/s13679-023-00516-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/20/2023] [Indexed: 07/06/2023]
Abstract
PURPOSEOF REVIEW This narrative review explored the role of ketogenic diets (KDs) in improving fertility outcomes, low-grade inflammation, body weight, visceral adipose tissue, and its potential use in certain types of cancer, through its favorable actions on mitochondrial function, reactive oxygen species generation, chronic inflammation, and tumor growth inhibition. RECENT FINDINGS : Nutrition is crucial to maintain the female reproductive system's health. Evidence on the association between diet and female reproductive system has greatly expanded over the last decade, leading to the identification of specific diet therapy, particularly KDs. KDs has been proved to be an effective weight-loss tool. To date, KDs is being increasingly used in the treatment of many diseases, such as obesity, type 2 diabetes mellitus. KDs is a dietary intervention capable of ameliorating the inflammatory state and oxidative stress through several mechanisms. Due to the increasing use of KDs beyond obesity, this literature review will provide the latest scientific evidence of its possible use in common disorders of the female endocrine-reproductive tract, and a practical guide to its use in these patients.
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Affiliation(s)
- Elisabetta Camajani
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, 00166, Rome, Italy
| | - Alessandra Feraco
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, 00166, Rome, Italy
- Laboratory of Cardiovascular Endocrinology, IRCCS San Raffaele, Rome, Italy
| | - Ludovica Verde
- Centro Italiano Per La Cura E Il Benessere del Paziente Con Obesità (C.I.B.O), Dipartimento Di Medicina Clinica E Chirurgia, Unit of Endocrinology, Università Degli Studi Di Napoli Federico II, Naples, Italy
- Department of Public Health, University "Federico II" of Naples, 80138, Naples, Italy
| | - Eleonora Moriconi
- Laboratory of Cardiovascular Endocrinology, IRCCS San Raffaele, Rome, Italy
| | - Marco Marchetti
- Section of Clinical Nutrition and Nutrigenomic, Department of Biomedicine and Prevention, University of Tor Vergata, Via Montpellier 1, 00133, Rome, Italy
| | - Annamaria Colao
- Centro Italiano Per La Cura E Il Benessere del Paziente Con Obesità (C.I.B.O), Dipartimento Di Medicina Clinica E Chirurgia, Unit of Endocrinology, Università Degli Studi Di Napoli Federico II, Naples, Italy
- Dipartimento Di Medicina Clinica E Chirurgia, Unità Di Diabetologia E Andrologia, Università Degli Studi Di Napoli Federico II, Via Sergio Pansini 5, 80131Naples, , Endocrinologia, Italy
- Cattedra Unesco "Educazione Alla Salute E Allo Sviluppo Sostenibile", Università Degli Studi Di Napoli Federico II, Naples, Italy
| | - Massimiliano Caprio
- Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open University, 00166, Rome, Italy
- Laboratory of Cardiovascular Endocrinology, IRCCS San Raffaele, Rome, Italy
| | - Giovanna Muscogiuri
- Centro Italiano Per La Cura E Il Benessere del Paziente Con Obesità (C.I.B.O), Dipartimento Di Medicina Clinica E Chirurgia, Unit of Endocrinology, Università Degli Studi Di Napoli Federico II, Naples, Italy.
- Dipartimento Di Medicina Clinica E Chirurgia, Unità Di Diabetologia E Andrologia, Università Degli Studi Di Napoli Federico II, Via Sergio Pansini 5, 80131Naples, , Endocrinologia, Italy.
- Cattedra Unesco "Educazione Alla Salute E Allo Sviluppo Sostenibile", Università Degli Studi Di Napoli Federico II, Naples, Italy.
| | - Luigi Barrea
- Centro Italiano Per La Cura E Il Benessere del Paziente Con Obesità (C.I.B.O), Dipartimento Di Medicina Clinica E Chirurgia, Unit of Endocrinology, Università Degli Studi Di Napoli Federico II, Naples, Italy
- Dipartimento Di Scienze Umanistiche, Centro Direzionale, Università Telematica Pegaso, Via Porzio Isola F2, 80143, Naples, Italy
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21
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Gaspa G, Naciu AM, DI Rosa C, Lattanzi G, Beato I, Micheli V, Turriziani C, Khazrai YM, Cesareo R. Short- and long-term effects of very low- and low-calorie ketogenic diets on metabolism and cardiometabolic risk factors: a narrative review. Minerva Endocrinol (Torino) 2023; 48:318-333. [PMID: 36285748 DOI: 10.23736/s2724-6507.22.03922-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Worldwide obesity and cardiovascular diseases have encouraged the adoption of new and efficient dietary strategies. Among various proposed diets, ketogenic diets, both the very-low-calorie ketogenic diet (VLCKD) and the low-calorie ketogenic diet (LCKD), have been suggested in recent years as an effective nutritional approach for obesity management. The VLCKD and the LCKD are characterized by a low carbohydrate content (<50 g/day), 1-1.5 g of protein/kg of ideal body weight, less than 20-30 g of lipids, and a daily intake of about 800 calories for VLCKD and about 1200-1400 calories for LCKD. The purpose of our narrative review is to offer an overview of the most impactful studies in the scientific literature regarding VLCKD and LCKD to discuss their short- and long-term effects (less than 12 months and more than 12 months respectively) on weight loss, metabolic and cardiovascular aspects. Articles we focused on were cohort studies, case-control studies, cross-sectional studies, randomized controlled trials, and meta-analyses. Results indicate that VLCKD and LCKD could be helpful to ameliorate metabolic and cardiovascular risk factors such as weight loss, glucose, and cholesterol levels, both in the short and long term. Further research in this area may include more randomized controlled trials to gather more data.
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Affiliation(s)
- Gianluigi Gaspa
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy -
| | - Anda M Naciu
- Unit of Endocrinology and Diabetes, Department of Medicine, Campus Bio-Medico University, Rome, Italy
| | - Claudia DI Rosa
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Greta Lattanzi
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Ivan Beato
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Vanessa Micheli
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Clara Turriziani
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Yeganeh M Khazrai
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Roberto Cesareo
- Unit of Metabolic Diseases, 'S.M. Goretti' Hospital, Latina, Italy
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22
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Crespo-Yanguas M, Lumpuy-Castillo J, Espadas C, Aragón-Valera C, Vázquez C, Lorenzo Ó. A Program of Life-Style Modification Improved the Body Weight and Micronutrient Status in Obese Patients after Bariatric Surgery. Nutrients 2023; 15:3807. [PMID: 37686839 PMCID: PMC10490431 DOI: 10.3390/nu15173807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023] Open
Abstract
INTRODUCTION Bariatric surgery is an efficient approach to rapidly reduce morbid obesity and associated comorbidities. However, approximately one-fourth of patients experience weight and comorbidity recurrence, and both obesity and bariatric surgery can lead to micronutrient deficiencies. Implementing a structured program of lifestyle modification (PLM) might enhance weight loss and improve micronutrient status. METHODOLOGY A total of 121 severely obese patients underwent Roux-en-Y gastric bypass (RYGB). Among them, 71 adhered to a PLM involving dietary changes (low- and very-low-calorie Mediterranean diets) and physical exercises (aerobic and resistance training) both before and after surgery, while 50 patients followed a conventional protocol. Anthropometric measurements and serological parameter quantifications were conducted throughout the procedures. RESULTS The obese study population, primarily female (76.9%), with an average age of 47.11 ± 9.68, and a body mass index (BMI) of 44.68 ± 5.08 kg/m2, underwent either RYGB with a PLM or a conventional procedure. Before surgery, the PLM group exhibited significant reductions in body weight (6.3%) and phosphoremia compared to the conventional protocol (0.78%). Post-RYGB, the PLM group demonstrated shortened in-hospital stays and further BMI reductions (-16.12 kg/m2) that persisted for up to 2 years. Furthermore, the PLM group experienced increased plasma vitamin D levels (14.79 ng/mL vs. 1.2 ng/mL) for up to 2 years, as well as elevated folic acid (1.52 vs. -0.29 ng/mL) and phosphorus (0.48 vs. 0.06 mg/dL) levels at 1 month and 1 year after intervention, respectively. Notably, these effects were independent of weight loss. CONCLUSIONS Initiating a structured PLM from the early stages of patients' preparation for RYGB could enhance and extend the benefits of weight loss and positively impact micronutrient (vitamin D, phosphorus, and folic acid) status in obese patients.
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Affiliation(s)
- Marta Crespo-Yanguas
- Division of Endocrinology, Hospital Fundación Jiménez Díaz, 28040 Madrid, Spain; (M.C.-Y.); (C.A.-V.); (C.V.)
| | - Jairo Lumpuy-Castillo
- Laboratory of Diabetes and Vascular Pathology, IIS-Fundación Jiménez Díaz, Universidad Autónoma, 28040 Madrid, Spain; (J.L.-C.); (C.E.)
- Biomedical Research Network on Diabetes and Associated Metabolic Disorders (CIBERDEM), Carlos III National Health Institute, 28029 Madrid, Spain
| | - Cristina Espadas
- Laboratory of Diabetes and Vascular Pathology, IIS-Fundación Jiménez Díaz, Universidad Autónoma, 28040 Madrid, Spain; (J.L.-C.); (C.E.)
- Biomedical Research Network on Diabetes and Associated Metabolic Disorders (CIBERDEM), Carlos III National Health Institute, 28029 Madrid, Spain
| | - Carmen Aragón-Valera
- Division of Endocrinology, Hospital Fundación Jiménez Díaz, 28040 Madrid, Spain; (M.C.-Y.); (C.A.-V.); (C.V.)
| | - Clotilde Vázquez
- Division of Endocrinology, Hospital Fundación Jiménez Díaz, 28040 Madrid, Spain; (M.C.-Y.); (C.A.-V.); (C.V.)
| | - Óscar Lorenzo
- Laboratory of Diabetes and Vascular Pathology, IIS-Fundación Jiménez Díaz, Universidad Autónoma, 28040 Madrid, Spain; (J.L.-C.); (C.E.)
- Biomedical Research Network on Diabetes and Associated Metabolic Disorders (CIBERDEM), Carlos III National Health Institute, 28029 Madrid, Spain
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23
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Dyńka D, Paziewska A, Kowalcze K. Keto Menu-Effect of Ketogenic Menu and Intermittent Fasting on the Biochemical Markers and Body Composition in a Physically Active Man-A Controlled Case Study. Foods 2023; 12:3219. [PMID: 37685152 PMCID: PMC10486763 DOI: 10.3390/foods12173219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 08/19/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023] Open
Abstract
The combination of ketogenic diet (KD) with intermittent fasting (IF) has, for years, aroused a great interest in the scientific world and among healthy lifestyle enthusiasts. Its importance is even greater when the study subjects are physically active individuals. The aim of the study was a determination of the effect of strict calculated ketogenic menu combined with IF and with caloric deficit on the selected biochemical markers and body composition in a 23-year-old man performing strength training. At the same time, we decided to conduct the first so-deeply investigated and controlled case study in this respect. The study protocol included a 13-week-long ketogenic diet with intermittent fasting (of delayed time-restricted eating 16:8 type) and caloric deficit. A detailed menu was designed and was used by the man throughout the whole study duration. A number of blood tests were performed before and after the implemented dietary intervention. Additionally, body composition was determined weekly and the concentrations of glucose and ketone bodies, as well as pulse rate and arterial pressure, were measured daily. The most important changes noted included a significant increase in testosterone and vitamin D concentrations and significant reduction in the HOMA-IR index and concentrations of hepatic enzymes, insulin, glucose, iron, urea, and free triiodothyronine (FT3). Moreover, a significant improvement of body composition occurred (the ratio of total body mass to the adipose and muscular tissue and water mass improved). Favourable changes were also noted in heart rate and arterial pressure values. In view of that, the KD with IF and caloric deficit exerted favourable effects on most biochemical parameters and on body composition and caused an almost twofold increase in serum testosterone concentration.
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Affiliation(s)
| | | | - Katarzyna Kowalcze
- Institute of Health Sciences, Faculty of Medical and Health Sciences, Siedlce University of Natural Sciences and Humanities, 08-110 Siedlce, Poland; (D.D.); (A.P.)
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Paoli A, Bianco A, Moro T, Mota JF, Coelho-Ravagnani CF. The Effects of Ketogenic Diet on Insulin Sensitivity and Weight Loss, Which Came First: The Chicken or the Egg? Nutrients 2023; 15:3120. [PMID: 37513538 PMCID: PMC10385501 DOI: 10.3390/nu15143120] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
The ketogenic diet (KD) is, nowadays, considered an interesting nutritional approach for weight loss and improvement in insulin resistance. Nevertheless, most of the studies available in the literature do not allow a clear distinction between its effects on insulin sensitivity per se, and the effects of weight loss induced by KDs on insulin sensitivity. In this review, we discuss the scientific evidence on the direct and weight loss mediated effects of KDs on glycemic status in humans, describing the KD's biochemical background and the underlying mechanisms.
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Affiliation(s)
- Antonio Paoli
- Department of Biomedical Sciences, University of Padua, 35127 Padua, Italy
- Research Center for High Performance Sport, UCAM, Catholic University of Murcia, 30107 Murcia, Spain
| | - Antonino Bianco
- Sport and Exercise Sciences Research Unit, University of Palermo, 90144 Palermo, Italy
| | - Tatiana Moro
- Department of Biomedical Sciences, University of Padua, 35127 Padua, Italy
| | - Joao Felipe Mota
- School of Nutrition, Federal University of Goiás, Goiânia 74605-080, Brazil
- APC Microbiome Ireland, Department of Medicine, School of Microbiology, University College Cork, T12 YT20 Cork, Ireland
| | - Christianne F Coelho-Ravagnani
- Research in Exercise and Nutrition in Health and Sports Performance-PENSARE, Post-Graduate Program in Movement Sciences, Institute of Health (INISA), Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil
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25
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Gohari S, Ghobadi S, Jafari A, Ahangar H, Gohari S, Mahjani M. The effect of dietary approaches to stop hypertension and ketogenic diets intervention on serum uric acid concentration: a systematic review and meta-analysis of randomized controlled trials. Sci Rep 2023; 13:10492. [PMID: 37380733 DOI: 10.1038/s41598-023-37672-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 06/26/2023] [Indexed: 06/30/2023] Open
Abstract
Hyperuricemia as a risk factor for metabolic diseases is proved to be profoundly modified by dietary approaches. This systematic review and meta-analysis of randomized control trials (RCT) was conducted to investigate the effect of two nutritional interventions; dietary approaches to stop hypertension (DASH) diet and ketogenic diet (KD) on serum uric acid (UA) concentrations. Our systematic search was for RCTs in which KD or DASH diet were assigned to adults for at least 2 weeks or more. Until March 2023 in Embase, Web of Science, PubMed, and Scopus databases, 10 eligible RCTs that intervened with DASH diet (n = 4) or KD (n = 6) and had provided laboratory data on serum UA were found. Summary effect was calculated by random-effects model. Results from the meta-analysis of the 4 DASH diet RCTs with a total of 590 participants revealed significant decrease in serum UA after at least 4 weeks of interventions (mean difference (MD) = ‒0.25; 95% CI ‒0.4 to ‒0.1 mg/dL; p < 0.01; I2 = 0%). The pooled meta-analysis of the 6 included RCTs of KD reporting data of 267 participants showed no significant changes in serum UA (MD = 0.26; 95% CI ‒0.47 to 0.98 mg/dL, I2 = 95.32%). However, a non-significant reduction of UA in the subgroup analysis of very low-calorie KD (VLCKD) studies (MD = ‒0.04; 95% CI ‒0.29 to 0.22, I2 = 0%) was obtained. DASH diet has an ameliorating effect on serum UA and may be recommended for hyperuricemia states such as gout. In addition, we have shown that serum UA level following KD remained unchanged. Although, in view of the heterogeneity across the studies, further investigations are needed to determine the effect of KD and VLKD on serum UA concentrations.
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Affiliation(s)
- Sepehr Gohari
- Student Research Center, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
- Department of Family Medicine, School of Medicine, Alborz University of Medical Sciences, Alborz, Iran
| | - Saeed Ghobadi
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Melbourne, Australia
| | - Alireza Jafari
- Physiology Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Hassan Ahangar
- Department of Cardiology, School of Medicine, Mousavi Hospital, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Sheida Gohari
- Department of Systems Science and Industrial Engineering, State University of New York at Binghamton, Binghamton, NY, USA
| | - Mahsa Mahjani
- Department of Family Medicine, School of Medicine, Alborz University of Medical Sciences, Alborz, Iran.
- Endocrine Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
- Student Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Jeziorek M, Szuba A, Sowicz M, Adaszyńska A, Kujawa K, Chachaj A. The Effect of a Low-Carbohydrate High-Fat Diet on Laboratory Parameters in Women with Lipedema in Comparison to Overweight/Obese Women. Nutrients 2023; 15:nu15112619. [PMID: 37299581 DOI: 10.3390/nu15112619] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/20/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023] Open
Abstract
The aim of this study was to evaluate alterations in blood parameters after a low-carbohydrate high-fat (LCHF) diet in women with lipedema in comparison to overweight or obese women. A total of 115 women were classified into two groups: the lipedema group and the overweight/obesity group. Both study groups followed the caloric-restricted LCHF diet for 7 months. A total of 48 women completed the study. A reduction in body weight was observed in both study groups. A significant decrease in triglycerides and an increase in HDL-C concentrations were observed in both study groups. Despite the increase in the concentration of LDL-C observed in the lipedema group, changes in LDL-C differed between individual patients. Improvements in liver parameters, glucose tolerance, and a decrease in fasting insulin levels were observed, although they were less pronounced in the lipedema group than in the overweight/obesity group. Kidney and thyroid functions were similar before and after the LCHF diet in both groups. The LCHF diet may be a valuable nutritional strategy for lipedema and overweight/obese women, with a beneficial effect on weight, glucose profile, liver function, the concentration of triglycerides, and HDL-C and with no effect on kidney and thyroid function.
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Affiliation(s)
- Małgorzata Jeziorek
- Department of Dietetics and Bromatology, Faculty of Pharmacy, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Andrzej Szuba
- Department of Angiology, Hypertension and Diabetology, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Monika Sowicz
- Department of Angiology, Hypertension and Diabetology, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Agnieszka Adaszyńska
- Department of Angiology, Hypertension and Diabetology, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Krzysztof Kujawa
- Statistical Analysis Center, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Angelika Chachaj
- Department of Angiology, Hypertension and Diabetology, Wroclaw Medical University, 50-367 Wroclaw, Poland
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Sergeeva E, Ruksha T, Fefelova Y. Effects of Obesity and Calorie Restriction on Cancer Development. Int J Mol Sci 2023; 24:ijms24119601. [PMID: 37298551 DOI: 10.3390/ijms24119601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/25/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
The risk of malignant tumor development is increasing in the world. Obesity is an established risk factor for various malignancies. There are many metabolic alterations associated with obesity which promote cancerogenesis. Excessive body weight leads to increased levels of estrogens, chronic inflammation and hypoxia, which can play an important role in the development of malignancies. It is proved that calorie restriction can improve the state of patients with various diseases. Decreased calorie uptake influences lipid, carbohydrate and protein metabolism, hormone levels and cell processes. Many investigations have been devoted to the effects of calorie restriction on cancer development in vitro and in vivo. It was revealed that fasting can regulate the activity of the signal cascades including AMP-activated protein kinase (AMPK), mitogen-activated protein kinase (MAPK), p53, mTOR, insulin/ insulin-like growth factor 1 (IGF1) and JAK-STAT. Up- or down-regulation of the pathways results in the decrease of cancer cell proliferation, migration and survival and the increase of apoptosis and effects of chemotherapy. The aim of this review is to discuss the connection between obesity and cancer development and the mechanisms of calorie restriction influence on cancerogenesis that stress the importance of further research of calorie restriction effects for the inclusion of this approach in clinical practice.
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Affiliation(s)
- Ekaterina Sergeeva
- Department of Pathological Physiology, Krasnoyarsk State Medical University, No. 1 P. Zheleznyaka Str., 660022 Krasnoyarsk, Russia
| | - Tatiana Ruksha
- Department of Pathological Physiology, Krasnoyarsk State Medical University, No. 1 P. Zheleznyaka Str., 660022 Krasnoyarsk, Russia
| | - Yulia Fefelova
- Department of Pathological Physiology, Krasnoyarsk State Medical University, No. 1 P. Zheleznyaka Str., 660022 Krasnoyarsk, Russia
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Paoli A, Cerullo G. Investigating the Link between Ketogenic Diet, NAFLD, Mitochondria, and Oxidative Stress: A Narrative Review. Antioxidants (Basel) 2023; 12:antiox12051065. [PMID: 37237931 DOI: 10.3390/antiox12051065] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 05/28/2023] Open
Abstract
Together with the global rise in obesity and metabolic syndrome, the prevalence of individuals who suffer from nonalcoholic fatty liver disease (NAFLD) has risen dramatically. NAFLD is currently the most common chronic liver disease and includes a continuum of liver disorders from initial fat accumulation to nonalcoholic steatohepatitis (NASH), considered the more severe forms, which can evolve in, cirrhosis, and hepatocellular carcinoma. Common features of NAFLD includes altered lipid metabolism mainly linked to mitochondrial dysfunction, which, as a vicious cycle, aggravates oxidative stress and promotes inflammation and, as a consequence, the progressive death of hepatocytes and the severe form of NAFLD. A ketogenic diet (KD), i.e., a diet very low in carbohydrates (<30 g/die) that induces "physiological ketosis", has been demonstrated to alleviate oxidative stress and restore mitochondrial function. Based on this, the aim of the present review is to analyze the body of evidence regarding the potential therapeutic role of KD in NAFLD, focusing on the interplay between mitochondria and the liver, the effects of ketosis on oxidative stress pathways, and the impact of KD on liver and mitochondrial function.
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Affiliation(s)
- Antonio Paoli
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
- Research Center for High Performance Sport, UCAM Catholic University of Murcia, 30107 Murcia, Spain
| | - Giuseppe Cerullo
- Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy
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Jin L, Du Y, Zhang M, Chen J, Sha L, Cao M, Tong L, Chen Q, Shen C, Du L, Wang D, Li Z. Arterial Stiffness, Body Mass Index and Cardiovascular Disease Risk in Chinese Females at Various Ages. Rev Cardiovasc Med 2023; 24:144. [PMID: 39076754 PMCID: PMC11273021 DOI: 10.31083/j.rcm2405144] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/24/2022] [Accepted: 01/07/2023] [Indexed: 07/31/2024] Open
Abstract
Background This study investigated the correlation in parameters of arterial stiffness and cardiovascular disease (CVD) risk on age and body mass index (BMI) in Chinese females. Methods This cross-sectional study enrolled 2220 females. Arterial stiffness was assessed by the measurement of arterial velocity pulse index (AVI) and arterial pressure volume index (API). Individual 10-year cardiovascular risk was calculated for each patient using the Framingham cardiovascular risk score (FCVRS). Results API and AVI had a significant J-shaped relationship with age. Beginning at the age of 30 years, the API started to increase, while after 49 years, the increase in API was even steeper. AVI increased from the age of 32 years, and increased more rapidly after 56 years. The linear association between API and BMI following adjustment for age was significant ( β = 0.324, 95% CI 0.247-0.400, p < 0.001). In the total study cohort, FCVRS scores increased by 0.16 scores for every 1 kg/ m 2 increase in BMI and by 0.11 scores for each 1 value increase in API in the age adjusted model. Conclusions API and BMI correlate with 10-year cardiovascular risk at various ages in females. Regardless of age, overweight females have a higher risk of increased API. Therefore API can be used for the early detection of CVD so that preventive therapy can be instituted in these high risk patients. Clinical Trial Registration Registered on the official website of the China Clinical Trial Registration Center (20/08/2020, ChiCTR2000035937).
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Affiliation(s)
- Lin Jin
- Department of Ultrasound, Guanghua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, 200052 Shanghai, China
| | - Yichao Du
- Department of Neurosurgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 200080 Shanghai, China
| | - Mengjiao Zhang
- Department of Medical Imaging, Weifang Medical University, 261053 Weifang, Shandong, China
| | - Jianxiong Chen
- Department of Ultrasound, Mindong Hospital Affiliated to Fujian Medical University, 355000 Ningde, Fujian, China
| | - Lei Sha
- Department of Ultrasound, Shanghai General Hospital Jiading Branch, Shanghai Jiaotong University School of Medicine, 201812 Shanghai, China
| | - Mengmeng Cao
- Department of Ultrasound, Shanghai General Hospital Jiading Branch, Shanghai Jiaotong University School of Medicine, 201812 Shanghai, China
| | - Lanyue Tong
- Department of Ultrasound, Shanghai General Hospital Jiading Branch, Shanghai Jiaotong University School of Medicine, 201812 Shanghai, China
| | - Qingqing Chen
- Department of Ultrasound, Shanghai General Hospital Jiading Branch, Shanghai Jiaotong University School of Medicine, 201812 Shanghai, China
| | - Cuiqin Shen
- Department of Ultrasound, Shanghai General Hospital Jiading Branch, Shanghai Jiaotong University School of Medicine, 201812 Shanghai, China
| | - Lianfang Du
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, 200080 Shanghai, China
| | - Dingqian Wang
- School of Informatics, College of Science & Engineering, The University of Edinburgh, EH8 9AB Edinburgh, UK
| | - Zhaojun Li
- Department of Ultrasound, Shanghai General Hospital Jiading Branch, Shanghai Jiaotong University School of Medicine, 201812 Shanghai, China
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, 200080 Shanghai, China
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Torres-Peña JD, Arenas-de Larriva AP, Alcala-Diaz JF, Lopez-Miranda J, Delgado-Lista J. Different Dietary Approaches, Non-Alcoholic Fatty Liver Disease and Cardiovascular Disease: A Literature Review. Nutrients 2023; 15:nu15061483. [PMID: 36986213 PMCID: PMC10058124 DOI: 10.3390/nu15061483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/14/2023] [Accepted: 03/19/2023] [Indexed: 03/30/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the first cause of chronic liver disease and is also associated with other harmful entities such as obesity, metabolic syndrome, dyslipidemia, and diabetes. NAFLD is a significant public health concern worldwide, impacting individuals of all ages, and its prevalence is projected to increase in the near future due to its connection with obesity. Intrinsic (genetics) and external (lifestyle) factors may also modulate NAFLD, and, in turn, may partly explain the observed relationship between NAFLD and cardiovascular disease (CVD). Although many drugs are been tested to treat NAFLD, to date, no drug has indication to specifically treat this disorder. Thus, the current management of NAFLD relies on lifestyle modifications and specifically on weight loss, physical activity, and the intake of a healthy diet. In the present narrative review, we will discuss the effects of certain dietary patterns on NAFLD incidence and progression.
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Affiliation(s)
- Jose D Torres-Peña
- Lipids and Atherosclerosis Unit, Department of Internal Medicine, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Av. Menéndez Pidal s/n, 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Antonio P Arenas-de Larriva
- Lipids and Atherosclerosis Unit, Department of Internal Medicine, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Av. Menéndez Pidal s/n, 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Juan F Alcala-Diaz
- Lipids and Atherosclerosis Unit, Department of Internal Medicine, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Av. Menéndez Pidal s/n, 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Jose Lopez-Miranda
- Lipids and Atherosclerosis Unit, Department of Internal Medicine, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Av. Menéndez Pidal s/n, 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Javier Delgado-Lista
- Lipids and Atherosclerosis Unit, Department of Internal Medicine, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, Av. Menéndez Pidal s/n, 14004 Cordoba, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
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Small Intestinal Bacterial Overgrowth and Non-Alcoholic Fatty Liver Disease: What Do We Know in 2023? Nutrients 2023; 15:nu15061323. [PMID: 36986052 PMCID: PMC10052062 DOI: 10.3390/nu15061323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/27/2023] [Accepted: 03/03/2023] [Indexed: 03/11/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a chronic liver disease associated with the pathological accumulation of lipids inside hepatocytes. Untreated NAFL can progress to non-alcoholic hepatitis (NASH), followed by fibrosis, cirrhosis, and hepatocellular carcinoma (HCC). The common denominator of the above-mentioned metabolic disorders seems to be insulin resistance, which occurs in NAFLD patients. Obesity is the greatest risk factor for lipid accumulation inside hepatocytes, but a part of the NAFLD patient population has a normal body weight according to the BMI index. Obese people with or without NAFLD have a higher incidence of small intestinal bacterial overgrowth (SIBO), and those suffering from NAFLD show increased intestinal permeability, including a more frequent presence of bacterial overgrowth in the small intestine (SIBO). The health consequences of SIBO are primarily malabsorption disorders (vitamin B12, iron, choline, fats, carbohydrates and proteins) and bile salt deconjugation. Undetected and untreated SIBO may lead to nutrient and/or energy malnutrition, thus directly impairing liver function (e.g., folic acid and choline deficiency). However, whether SIBO contributes to liver dysfunction, decreased intestinal barrier integrity, increased inflammation, endotoxemia and bacterial translocation is not yet clear. In this review, we focus on gut–liver axis and discuss critical points, novel insights and the role of nutrition, lifestyle, pre- and probiotics, medication and supplements in the therapy and prevention of both SIBO and NAFLD.
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Kosmalski M, Frankowski R, Ziółkowska S, Różycka-Kosmalska M, Pietras T. What's New in the Treatment of Non-Alcoholic Fatty Liver Disease (NAFLD). J Clin Med 2023; 12:jcm12051852. [PMID: 36902639 PMCID: PMC10003344 DOI: 10.3390/jcm12051852] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/09/2023] [Accepted: 02/20/2023] [Indexed: 03/02/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a serious health problem due to its high incidence and consequences. In view of the existing controversies, new therapeutic options for NAFLD are still being sought. Therefore, the aim of our review was to evaluate the recently published studies on the treatment of NAFLD patients. We searched for articles in the PubMed database using appropriate terms, including "non-alcoholic fatty liver disease", "nonalcoholic fatty liver disease", "NAFLD", "diet", "treatment", "physical activity", "supplementation", "surgery", "overture" and "guidelines". One hundred forty-eight randomized clinical trials published from January 2020 to November 2022 were used for the final analysis. The results show significant benefits of NAFLD therapy associated with the use of not only the Mediterranean but also other types of diet (including low-calorie ketogenic, high-protein, anti-inflammatory and whole-grain diets), as well as enrichment with selected food products or supplements. Significant benefits in this group of patients are also associated with moderate aerobic physical training. The available therapeutic options indicate, above all, the usefulness of drugs related to weight reduction, as well as the reduction in insulin resistance or lipids level and drugs with anti-inflammatory or antioxidant properties. The usefulness of therapy with dulaglutide and the combination of tofogliflozin with pioglitazone should be emphasized. Based on the results of the latest research, the authors of this article suggest a revision of the therapeutic recommendations for NAFLD patients.
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Affiliation(s)
- Marcin Kosmalski
- Department of Clinical Pharmacology, Medical University of Lodz, 90-153 Lodz, Poland
- Correspondence: ; Tel.: +48-728-358-504
| | - Rafał Frankowski
- Students’ Research Club, Department of Clinical Pharmacology, Medical University of Lodz, 90-153 Lodz, Poland
| | - Sylwia Ziółkowska
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland
| | | | - Tadeusz Pietras
- Department of Clinical Pharmacology, Medical University of Lodz, 90-153 Lodz, Poland
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The Effects of Eight Weeks' Very Low-Calorie Ketogenic Diet (VLCKD) on Liver Health in Subjects Affected by Overweight and Obesity. Nutrients 2023; 15:nu15040825. [PMID: 36839183 PMCID: PMC9962649 DOI: 10.3390/nu15040825] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 01/31/2023] [Accepted: 02/03/2023] [Indexed: 02/08/2023] Open
Abstract
Very low-calorie ketogenic diets (VLCKD) are widely employed in successful weight-loss strategies. Herein, we evaluated the efficacy and safety of a VLCKD on non-alcoholic fatty liver disease (NAFLD) and parameters commonly associated with this condition in overweight and obese subjects who did not take any drugs. This prospective, real-life study included thirty-three participants who followed a VLCKD for 8 weeks. NAFLD was diagnosed using transient elastography (FibroScan). Data on anthropometric measurements, bioimpedance analysis, and biochemical assays were gathered both before and after the dietary intervention. BMI (kg/m2) (from 33.84 ± 6.55 to 30.89 ± 6.38, p < 0.01), waist circumference (cm) (from 106.67 ± 15.51 to 98.64 ± 16.21, p < 0.01), and fat mass (Kg) (from 38.47 ± 12.59 to 30.98 ± 12.39, p < 0.01) were significantly lower after VLCKD. CAP (db/m), the FibroScan parameter quantifying fatty liver accumulation, showed a significant reduction after VLCKD (from 266.61 ± 67.96 to 223 ± 64.19, p < 0.01). After VLCKD, the fatty liver index (FLI), a benchmark of steatosis, also revealed a significant decline (from 62.82 ± 27.46 to 44.09 ± 31.24, p < 0.01). Moreover, fasting blood glucose, insulin, triglycerides, total cholesterol, LDL-cholesterol, ALT, γGT, and FT3 blood concentrations, as well as insulin resistance (quantified by HOMAIR) and systolic and diastolic blood pressure levels, were significantly lower after VLCKD (p < 0.01 for all the parameters). By contrast, HDL-cholesterol, 25 (OH) vitamin D, and FT4 blood concentrations were higher after VLCKD (p < 0.01 for all parameters). The variation (δ) of CAP after VLCKD did not show a correlation with the δ of any other parameter investigated in this study. We conclude that VLCKD is a helpful approach for NAFLD independent of changes in factors commonly associated with NAFLD (obesity, fat mass, insulin resistance, lipids, and blood pressure) as well as vitamin D and thyroid hormone levels.
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Ye R, Cheng Y, Ge Y, Xu G, Tu W. A bibliometric analysis of the global trends and hotspots for the ketogenic diet based on CiteSpace. Medicine (Baltimore) 2023; 102:e32794. [PMID: 36749276 PMCID: PMC9902013 DOI: 10.1097/md.0000000000032794] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The ketogenic diet (KD) is a potential nutritional therapy that is frequently utilized in various conditions. More and more studies are being done on KD in recent years. However, as far as we know, few studies have made an effort to offer a thorough synthesis and assessment of this topic. This paper aims to do a rigorous and thorough evaluation of the knowledge structure, development trend, and research hotspot of scientific outputs connected to KD. The bibliographic records connected to KD from January 1, 2001 to April 22, 2022 were collected using the core collection database of Web of Science. The complex data input, that consisted of the amount of publications, journals, authors, institutions, countries, keywords and cited references, was generated and analyzed visually using CiteSpace. A total of 2676 literatures on the KD were published between 2001 and 2022. The most KD-related publications were found in Epilepsia and Epilepsia Research. The authors with the most KD-related papers are Kossoff EH and Rho J. The United States is the country with the most publications, and Johns Hopkins University, Johns Hopkins University Hospital, and Johns Hopkins Medical Institutions are the institutions with the most articles. The high frequency keywords are "KD," "ketone body," "children," "efficacy," "weight loss," "low carbohydrate diet," "metabolism," "epilepsy," "beta hydroxybutyrate," and "modified atkins diet." The 2018 study by Kossoff EH on epilepsia and the 2017 study by Puchalska P on ketone body metabolism earned 127 and 114 citations, respectively. The results of this bibliometric analysis provide information on the state and trends in KD and may be used by researchers to pinpoint hot issues and discover new areas of study.
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Affiliation(s)
- Ran Ye
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Yanfei Cheng
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Yingying Ge
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Guihua Xu
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- *Correspondence: Guihua Xu, Nanjing University of Chinese Medicine, No.138, Xianlin Avenue, Nanjing 210023, Jiangsu, China (e-mail: )
| | - Wenjing Tu
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
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Newberry C, Kumar S. Dietary and nutrition considerations in caring for patients with nonalcoholic fatty liver disease: Updates for the practicing clinician. Nutr Clin Pract 2023; 38:70-79. [PMID: 36183354 DOI: 10.1002/ncp.10917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 08/10/2022] [Accepted: 09/02/2022] [Indexed: 01/11/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the leading cause of chronic liver disease worldwide, affecting up to one-third of the global population. The disease is defined by excess fat deposition in the liver and has a strong correlation with metabolic syndrome, which, in turn, is also a risk factor for disease progression, including the development of steatohepatitis, advanced fibrosis, cirrhosis, and hepatocellular carcinoma. Although a number of medications are being explored for disease mitigation, nothing is currently approved, and the mainstay of therapy remains dietary and lifestyle intervention that promotes weight loss as well as management of comorbid conditions. The landscape that guides care for patients with NAFLD continues to evolve. Clinicians caring for these patients need to consider underlying disease state and nutrition risk in addition to concurrent related diagnoses, such as insulin resistance and hyperlipidemia, when formulating treatment plans. The following is a comprehensive review of the current dietary and nutrition considerations in the management of patients with NAFLD, with a special emphasis on implications for the practicing clinician.
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Affiliation(s)
- Carolyn Newberry
- Division of Gastroenterology, Innovative Center for Health and Nutrition in Gastroenterology (ICHANGE), Weill Cornell Medical Center, New York, New York, USA
| | - Sonal Kumar
- Division of Gastroenterology, Innovative Center for Health and Nutrition in Gastroenterology (ICHANGE), Weill Cornell Medical Center, New York, New York, USA
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Efficacy of Submicron Dispersible Free Phytosterols on Non-Alcoholic Fatty Liver Disease: A Pilot Study. J Clin Med 2023; 12:jcm12030979. [PMID: 36769628 PMCID: PMC9918217 DOI: 10.3390/jcm12030979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND No pharmacological treatment is yet approved for non-alcoholic fatty liver disease (NAFLD). Plant sterols have shown healthy properties beyond lowering LDL-cholesterol, including lowering triglycerides and lipoprotein plasma levels. Despite pre-clinical data suggesting their involvement in liver fat control, no clinical study has yet been successful. AIMS Testing a sub-micron, free, phytosterol dispersion efficacy on NAFLD. METHODS A prospective, uncontrolled pilot study was carried out on 26 patients with ≥17.4% liver steatosis quantified by magnetic resonance imaging. Subjects consumed daily a sub-micron dispersion providing 2 g of phytosterols. Liver fat, plasma lipids, lipoproteins, liver enzymes, glycemia, insulinemia, phytosterols, liposoluble vitamins and C-reactive protein were assessed at baseline and after one year of treatment. RESULTS Liver steatosis relative change was -19%, and 27% of patients reduced liver fat by more than 30%. Statistically and clinically significant improvements in plasma triglycerides, HDL-C, VLDL and HDL particle number and C-reactive protein were obtained, despite the rise of aspartate aminotransferase, glycemia and insulinemia. Though phytosterol plasma levels were raised by >30%, no adverse effects were presented, and even vitamin D increased by 23%. CONCLUSIONS Our results are the first evidence in humans of the efficacy of submicron dispersible phytosterols for the treatment of liver steatosis, dyslipidemia and inflammatory status in NAFLD.
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Effects of a Dulaglutide plus Calorie-Restricted Diet versus a Calorie-Restricted Diet on Visceral Fat and Metabolic Profiles in Women with Polycystic Ovary Syndrome: A Randomized Controlled Trial. Nutrients 2023; 15:nu15030556. [PMID: 36771262 PMCID: PMC9920202 DOI: 10.3390/nu15030556] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/09/2023] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
The effects of dulaglutide and a calorie-restricted diet (CRD) on visceral adipose tissue (VAT) and metabolic profiles in polycystic ovary syndrome (PCOS) have not been extensively investigated. In this study, we investigated whether dulaglutide combined with CRD could further reduce VAT and promote clinical benefits as compared with a CRD regimen alone in overweight or obese PCOS-affected women. Between May 2021 and May 2022, this single-center, randomized, controlled, open-label clinical trial was conducted. Overall, 243 participants with PCOS were screened, of which 68 overweight or obese individuals were randomly randomized to undergo dulaglutide combined with CRD treatment (n = 35) or CRD treatment alone (n = 33). The duration of intervention was set as the time taken to achieve a 7% weight loss goal from baseline body weight, which was restricted to 6 months. The primary endpoint was the difference in the change in VAT area reduction between the groups. The secondary endpoints contained changes in menstrual frequency, metabolic profiles, hormonal parameters, liver fat, and body composition. As compared with the CRD group, the dulaglutide + CRD group had a considerably shorter median time to achieve 7% weight loss. There was no significant between-group difference in area change of VAT reduction (-0.97 cm2, 95% confidence interval from -14.36 to 12.42, p = 0.884). As compared with CRD alone, dulaglutide + CRD had significant advantages in reducing glycated hemoglobin A1c and postprandial plasma glucose levels. The results of the analyses showed different changes in menstruation frequency, additional metabolic profiles, hormonal markers, liver fat, and body composition between the two groups did not differ significantly. Nausea, vomiting, constipation, and loss of appetite were the main adverse events of dulaglutide. These results emphasize the value of dietary intervention as the first line of treatment for PCOS-affected women, while glucagon-like peptide 1 receptor agonist therapy provides an efficient and typically well tolerated adjuvant therapy to aid in reaching weight targets based on dietary therapy in the population of overweight/obese PCOS-affected women.
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Oh S, Lee J, Chun S, Choi JE, Kim MN, Chon YE, Ha Y, Hwang SG, Choi SW, Hong KW. Interaction between the PNPLA3 Gene and Nutritional Factors on NAFLD Development: The Korean Genome and Epidemiology Study. Nutrients 2022; 15:152. [PMID: 36615809 PMCID: PMC9824262 DOI: 10.3390/nu15010152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/18/2022] [Accepted: 12/21/2022] [Indexed: 12/31/2022] Open
Abstract
Genetic and nutritional factors contribute to the development of non-alcoholic fatty liver disease (NAFLD); however, gene-diet interactions in NAFLD development are poorly understood. In this case-control study, a large dataset from the Korean Genome and Epidemiology Study cohort (n = 72,299) comprising genomic data, medical records, social history, and dietary data was used. We investigated the interactions between the PNPLA3 rs738409 genotype and nutritional factors and their possible effect on the risk of NAFLD development in 2950 patients with NAFLD and 12,907 controls. In the PNPLA3 risk allele group, high protein, fat, sodium, phosphorus, niacin, and vitamin B6 intakes were associated with a decreased risk of NAFLD. In the non-risk allele group, only high fat intake was associated with a decreased risk of NAFLD. Among these nutrients, high sodium intake had a significant protective interaction with the PNPLA3 genotype against NAFLD (p = 0.002). Among salty foods, only kimchi had a significant protective effect against the PNPLA3 genotype (p = 0.012). Thus, the PNPLA3 genotype is differentially associated with nutritional factors. In particular, it interacts with kimchi, a fermented vegetable dish. Therefore, fermented vegetables may serve as a tailored therapeutic food for people with the PNPLA3 risk allele.
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Affiliation(s)
- Sooyeon Oh
- Chaum Life Center, CHA University School of Medicine, Seoul 06062, Republic of Korea
| | - Jooho Lee
- Department of Gastroenterology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam 13496, Republic of Korea
| | - Sukyung Chun
- Department of Gastroenterology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam 13496, Republic of Korea
| | - Ja-Eun Choi
- Healthcare R&D Division, Theragen Bio Co., Ltd., Suwon 16229, Republic of Korea
| | - Mi Na Kim
- Department of Gastroenterology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam 13496, Republic of Korea
| | - Young Eun Chon
- Department of Gastroenterology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam 13496, Republic of Korea
| | - Yeonjung Ha
- Department of Gastroenterology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam 13496, Republic of Korea
| | - Seong-Gyu Hwang
- Department of Gastroenterology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam 13496, Republic of Korea
| | - Sang-Woon Choi
- Chaum Life Center, CHA University School of Medicine, Seoul 06062, Republic of Korea
| | - Kyung-Won Hong
- Healthcare R&D Division, Theragen Bio Co., Ltd., Suwon 16229, Republic of Korea
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Tozzi R, Campolo F, Baldini E, Venneri MA, Lubrano C, Ulisse S, Gnessi L, Mariani S. Ketogenic Diet Increases Serum and White Adipose Tissue SIRT1 Expression in Mice. Int J Mol Sci 2022; 23:ijms232415860. [PMID: 36555502 PMCID: PMC9785229 DOI: 10.3390/ijms232415860] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/09/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022] Open
Abstract
Overnutrition and its sequelae have become a global concern due to the increasing incidence of obesity and insulin resistance. A ketogenic diet (KD) is widely used as a dietary treatment for metabolic disorders. Sirtuin1 (SIRT1), a metabolic sensor which regulates fat homeostasis, is modulated by dietary interventions. However, the influence of nutritional ketosis on SIRT1 is still debated. We examined the effect of KD on adipose tissue, liver, and serum levels of SIRT1 in mice. Adult C57BL/6J male mice were randomly assigned to two isocaloric dietary groups and fed with either high-fat KD or normal chow (NC) for 4 weeks. Serum SIRT1, beta-hydroxybutyrate (βHB), glucose, and triglyceride levels, as well as SIRT1 expression in visceral (VAT), subcutaneous (SAT), and brown (BAT) adipose tissues, and in the liver, were measured. KD-fed mice showed an increase in serum βHB in parallel with serum SIRT1 (r = 0.732, p = 0.0156), and increased SIRT1 protein expression in SAT and VAT. SIRT1 levels remained unchanged in BAT and in the liver, which developed steatosis. Normal glycemia and triglycerides were observed. Under a KD, serum and white fat phenotypes show higher SIRT1, suggesting that one of the molecular mechanisms underlying a KD's potential benefits on metabolic health involves a synergistic interaction with SIRT1.
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Affiliation(s)
- Rossella Tozzi
- Department of Molecular Medicine, “Sapienza” University of Rome, 00161 Rome, Italy
| | - Federica Campolo
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Enke Baldini
- Department of Surgical Sciences, “Sapienza” University of Rome, 00161 Rome, Italy
| | - Mary Anna Venneri
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Carla Lubrano
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Salvatore Ulisse
- Department of Surgical Sciences, “Sapienza” University of Rome, 00161 Rome, Italy
| | - Lucio Gnessi
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
| | - Stefania Mariani
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, Viale del Policlinico 155, 00161 Rome, Italy
- Correspondence: ; Tel.: +39-6-49970509; Fax: +39-6-4461450
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Luo W, Zhang J, Xu D, Zhou Y, Qu Z, Yang Q, Lv Q. Low carbohydrate ketogenic diets reduce cardiovascular risk factor levels in obese or overweight patients with T2DM: A meta-analysis of randomized controlled trials. Front Nutr 2022; 9:1092031. [PMID: 36583214 PMCID: PMC9792675 DOI: 10.3389/fnut.2022.1092031] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 11/29/2022] [Indexed: 12/15/2022] Open
Abstract
Background The purpose of this meta-analysis was to explore the effects of low-carbohydrate ketogenic diets on cardiovascular risk factors in overweight or obese patients. However, there are limited literature data about effects of low-carbohydrate ketogenic diets on cardiovascular risk factors in obese or overweight patients. Methods We systematically searched PubMed, EMBASE, Web of Science, OVID, and Cochrane Library databases (last updated in September 2022) for randomized controlled trials (RCTs) which recruited overweight or obesity patients on ketogenic diets in order to control cardiovascular risk factors (blood glucose, weight, and lipids). The overall effect size for continuous variables was expressed as a weighted standardized mean difference (SMD) with a confidence interval of 95%. Considering type 2 diabetes mellitus (T2DM) status at baseline, subgroup analyses were performed when appropriate, based on T2DM comorbidity among patients. The effect model was selected according to heterogeneity. Results We finally selected 21 studies. Low carbohydrate ketogenic diets exerted a greater impact on cardiovascular risk factors in obese/ overweight patients with T2DM when compared with those on non-ketogenic diets, with lower fasting plasma glucose (FPG) (SMD, -0.75; P < 0.001) and hemoglobin A1c (HbA1c) (SMD, -0.53; P < 0.001) levels identified. Low-carbohydrate ketogenic diets significantly reduced body mass index (BMI) (SMD, -2.27; P = 0.032), weight (SMD, -6.72; P < 0.001), and waist circumference (SMD, -4.45; P = 0.003) in obese/ overweight patients with T2DM. Also, ketogenic diets improved lipid profiles in these patients; triglyceride (TG) (SMD, -0.32; P = 0.013) levels were lowered and high density lipoprotein (HDL) showed an upward trend with the P-value close to statistically significant level (SMD, -0.32; P = 0.052). In general, irrespective of diabetic status at baseline, ketogenic diets were more effective in reducing TG (SMD, -0.2; P = 0.02) and increasing HDL (SMD, 0.11; P = 0.03) levels when compared with non-ketogenic diets. Conclusions Low-carbohydrate ketogenic diets effectively improved cardiovascular risk factors (blood glucose, weight, and lipids) in obese/ overweight patients, especially those with T2DM when compared with non-ketogenic diets.
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Effect of Ketogenic Diets on Body Composition and Metabolic Parameters of Cancer Patients: A Systematic Review and Meta-Analysis. Nutrients 2022; 14:nu14194192. [PMID: 36235844 PMCID: PMC9570668 DOI: 10.3390/nu14194192] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/26/2022] [Accepted: 09/29/2022] [Indexed: 11/07/2022] Open
Abstract
A ketogenic diet characterized by high fat and low carbohydrate can drive the body to produce a large number of ketone bodies, altering human metabolism. Unlike normal cells, tumor cells have difficulty in consuming ketone bodies. Therefore, the application of ketogenic diets in cancer therapy is gaining attention. However, the effect of ketogenic diets on body parameters of cancer patients is not well established. This meta-analysis aimed to summarize the effects of ketogenic diets on cancer patients in earlier controlled trials. PubMed, Embase, and Cochrane Library were searched for clinical trials that enrolled cancer patients who received ketogenic diets intervention. Ten controlled trials were included in this meta-analysis. Data were extracted and checked by three authors independently. Pooled effect sizes revealed a significant effect of ketogenic diets on body weight (SMD −1.83, 95% CI −2.30 to −1.35; p < 0.00001) and fat mass (SMD −1.52, 95% CI −1.92 to −1.07; p < 0.00001). No significant effect on blood glucose, insulin, or lipid profile except triglycerides was found in the analysis. It had no effect on liver and kidney function except that GGT were decreased a little. There were no significant changes in IGF-1 and TNF-α related to tumor growth. Mental health improvement of cancer patients was supported by several trials. Taken together, findings in this study confirmed that the ketogenic diet was a safe approach for cancer patients reducing body weight and fat mass. In addition, cancer treatment-related indicators changed insignificantly. Ketogenic diets may be beneficial to the quality of life of cancer patients. However, intervention duration in most studies is shorter than 6 months, and the effect of a long-term ketogenic diet is still required further validation. More trials with a larger sample size are necessary to give a more conclusive result; PROSPERO registration number: CRD42021277559.
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Sripongpun P, Churuangsuk C, Bunchorntavakul C. Current Evidence Concerning Effects of Ketogenic Diet and Intermittent Fasting in Patients with Nonalcoholic Fatty Liver. J Clin Transl Hepatol 2022; 10:730-739. [PMID: 36062288 PMCID: PMC9396320 DOI: 10.14218/jcth.2021.00494] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 02/04/2022] [Accepted: 04/10/2022] [Indexed: 12/04/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is emerging globally, while no therapeutic medication has been approved as an effective treatment to date, lifestyle intervention through dietary modification and physical exercise plays a critical role in NAFLD management. In terms of dietary modification, Mediterranean diet is the most studied dietary pattern and is recommended in many guidelines, however, it may not be feasible and affordable for many patients. Recently, a ketogenic diet and intermittent fasting have gained public attention and have been studied in the role of weight management. This article reviews specifically whether these trendy dietary patterns have an effect on NAFLD outcomes regarding intrahepatic fat content, fibrosis, and liver enzymes, the scientific rationales behind these particular dietary patterns, as well as the safety concerns in some certain patient groups.
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Affiliation(s)
- Pimsiri Sripongpun
- Gastroenterology and Hepatology Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Thailand
| | - Chaitong Churuangsuk
- Nutrition and Obesity Management Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Thailand
| | - Chalermrat Bunchorntavakul
- Division of Gastroenterology and Hepatology, Department of Medicine, Rajavithi Hospital, Rangsit University, Bangkok, Thailand
- Correspondence to: Chalermrat Bunchorntavakul, Division of Gastroenterology and Hepatology, Department of Medicine, Rajavithi Hospital, College of Medicine, Rangsit University, Phayathai Road, Ratchathewi District, Bangkok 10400, Thailand. ORCID: https://orcid.org/0000-0002-8842-032X. Tel.: +66-2-354-8108-9, Fax: +66-2-3548179, E-mail:
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Herrington GJ, Peterson JJ, Cheng L, Allington BM, Jensen RD, Healy HS, Correia MLG. The use of very low-calorie diets in subjects with obesity complicated with nonalcoholic fatty liver disease: A scoping review. Obes Sci Pract 2022; 8:510-524. [PMID: 35949283 PMCID: PMC9358746 DOI: 10.1002/osp4.589] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 12/16/2021] [Accepted: 12/19/2021] [Indexed: 11/18/2022] Open
Abstract
This scoping review synthesizes the existing research on the use of very low-calorie diets (VLCDs) in subjects with nonalcoholic fatty liver disease (NAFLD) and end-stage liver disease (ESLD). 19 studies were included, of which 5 were clinical trials, 11 were cohort studies, 1 was a case-control study, and 2 were case series totaling 968 subjects. About 17 studies were focused on patients with NAFLD while the two case series described in patients with ESLD on the transplant list or post-liver transplant. Six studies included subjects managed with VLCDs prior bariatric surgery. Most studies were short term and demonstrated acute improvement of diverse liver biomarkers including liver function tests, indices of hepatosteatosis and reduction in liver size. Adherence rates in these studies were between 69% and 93%. Eight studies did not report any adverse events and four subjects were reported to have discontinued VLCD due to adverse effects in two different studies. Aggregated adverse events were mild. Treatments based on VLCD in subjects with NAFLD seem to be safe and tolerable but can result in mild adverse effects. The findings of this scoping review suggest that the use of VLCD in patients with obesity complicated with NAFLD and potentially in ESLD appear to be effective to induce weight loss and to acutely reduce hepatosteatosis.
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Affiliation(s)
- Grant J. Herrington
- Internal Medicine Residency ProgramBaylor University Medical CenterDallasTexasUSA
| | | | - Linhai Cheng
- College of Liberal Arts and SciencesUniversity of IowaIowa CityIowaUSA
| | | | - Renato D. Jensen
- College of Liberal Arts and SciencesUniversity of IowaIowa CityIowaUSA
| | - Heather S. Healy
- Hardin Library for the Health SciencesUniversity of IowaIowa CityIowaUSA
| | - Marcelo L. G. Correia
- Department of Internal MedicineDivision of EndocrinologyCarver College of MedicineUniversity of IowaIowa CityIowaUSA
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Ketone Bodies and SIRT1, Synergic Epigenetic Regulators for Metabolic Health: A Narrative Review. Nutrients 2022; 14:nu14153145. [PMID: 35956321 PMCID: PMC9370141 DOI: 10.3390/nu14153145] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/21/2022] [Accepted: 07/27/2022] [Indexed: 11/17/2022] Open
Abstract
Ketone bodies (KBs) and Sirtuin-1 (SIRT1) have received increasing attention over the past two decades given their pivotal function in a variety of biological contexts, including transcriptional regulation, cell cycle progression, inflammation, metabolism, neurological and cardiovascular physiology, and cancer. As a consequence, the modulation of KBs and SIRT1 is considered a promising therapeutic option for many diseases. The direct regulation of gene expression can occur in vivo through histone modifications mediated by both SIRT1 and KBs during fasting or low-carbohydrate diets, and dietary metabolites may contribute to epigenetic regulation, leading to greater genomic plasticity. In this review, we provide an updated overview of the epigenetic interactions between KBs and SIRT1, with a particular glance at their central, synergistic roles for metabolic health.
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Katsiki N, Stoian AP, Rizzo M. Dietary patterns in non-alcoholic fatty liver disease (NAFLD): Stay on the straight and narrow path! CLINICA E INVESTIGACION EN ARTERIOSCLEROSIS : PUBLICACION OFICIAL DE LA SOCIEDAD ESPANOLA DE ARTERIOSCLEROSIS 2022; 34 Suppl 1:S24-S31. [PMID: 35131122 DOI: 10.1016/j.arteri.2021.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 06/14/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most frequent hepatic disease globally. NAFLD patients are at an increased risk of both liver and cardiovascular morbidity and mortality, as well as all-cause death. NAFLD prevalence is rapidly increasing worldwide and, thus, there is an urgent need for health policies to tackle its development and complications. Currently, since there is no drug therapy officially indicated for this disease, lifestyle interventions remain the first-line therapeutic option. In the present narrative review, we discuss the effects of certain dietary patterns on NAFLD incidence and progression. The Mediterranean diet is regarded as the diet of choice for the prevention/treatment of NAFLD and its complications, based on the available evidence. Other plant-based dietary patterns (poor in saturated fat, refined carbohydrates, red and processed meats) are also beneficial [i.e., Dietary Approaches to Stop Hypertension (DASH) and vegetarian/vegan diets], whereas more data are needed to establish the role of ketogenic, intermittent fasting and paleo diets in NAFLD. Nevertheless, there is no "one-size-fits-all" dietary intervention for NAFLD management. Clinicians should discuss with their patients and define the diet that each individual prefers and is able to implement in his/her daily life.
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Affiliation(s)
- Niki Katsiki
- First Department of Internal Medicine, Diabetes Center, Division of Endocrinology and Metabolism, AHEPA University Hospital, Thessaloniki, Greece.
| | - Anca Pantea Stoian
- Department of Diabetes, Nutrition and Metabolic Diseases, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Manfredi Rizzo
- Department of Health Promotion Sciences Maternal and Infantile Care, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, Italy; Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of South Carolina, Columbia, SC, USA
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Gu C, Zhou Z, Yu Z, He M, He L, Luo Z, Xiao W, Yang Q, Zhao F, Li W, Shen L, Han J, Cao S, Zuo Z, Deng J, Yan Q, Ren Z, Zhao M, Yu S. The Microbiota and It’s Correlation With Metabolites in the Gut of Mice With Nonalcoholic Fatty Liver Disease. Front Cell Infect Microbiol 2022; 12:870785. [PMID: 35694542 PMCID: PMC9186341 DOI: 10.3389/fcimb.2022.870785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 04/25/2022] [Indexed: 11/17/2022] Open
Abstract
In recent years, nonalcoholic fatty liver disease (NAFLD) has become the most common liver disease in the world. As an important model animal, the characteristics of gut microbiota alteration in mice with NAFLD have been studied but the changes in metabolite abundance in NAFLD mice and how the gut microbiota affects these intestinal metabolites remain unclear. In this experiment, a mouse model for NAFLD was established by a high-fat diet. The use of 16S rDNA technology showed that while there were no significant changes in the alpha diversity in the cecum of NAFLD mice, the beta diversity changed significantly. The abundance of Blautia, Unidentified-Lachnospiraceae, Romboutsia, Faecalibaculum, and Ileibacterium increased significantly in NAFLD mice, while Allobaculum and Enterorhabdus decreased significantly. Amino acids, lipids, bile acids and nucleotide metabolites were among the 167 significantly different metabolites selected. The metabolic pathways of amino acids, SFAs, and bile acids were significantly enhanced, while the metabolic pathways of PUFAs, vitamins, and nucleotides were significantly inhibited. Through correlation and MIMOSA2 analysis, it is suggested that gut microbiota does not affect the changes of lipids and bile acids but can reduce thiamine, pyridoxine, and promote L-phenylalanine and tyramine production. The findings of this study will help us to better understand the relationship between gut microbiota and metabolites in NAFLD.
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Affiliation(s)
- Congwei Gu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
| | - Zihan Zhou
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zehui Yu
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
| | - Manli He
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
| | - Lvqin He
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
| | - Zhengzhong Luo
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Wudian Xiao
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
| | - Qian Yang
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
| | - Fangfang Zhao
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Weiyao Li
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Liuhong Shen
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Jianhong Han
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
| | - Suizhong Cao
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhicai Zuo
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Junliang Deng
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Qigui Yan
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhihua Ren
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Mingde Zhao
- Laboratory Animal Centre, Southwest Medical University, Luzhou, China
- *Correspondence: Mingde Zhao, ; Shumin Yu,
| | - Shumin Yu
- College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- *Correspondence: Mingde Zhao, ; Shumin Yu,
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Sánchez E, Santos MD, Nuñez-Garcia M, Bueno M, Sajoux I, Yeramian A, Lecube A. Randomized Clinical Trial to Evaluate the Morphological Changes in the Adventitial Vasa Vasorum Density and Biological Markers of Endothelial Dysfunction in Subjects with Moderate Obesity Undergoing a Very Low-Calorie Ketogenic Diet. Nutrients 2021; 14:33. [PMID: 35010908 PMCID: PMC8746664 DOI: 10.3390/nu14010033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/18/2021] [Accepted: 12/20/2021] [Indexed: 12/13/2022] Open
Abstract
Weight loss after bariatric surgery decreases the earlier expansion of the adventitial vasa vasorum (VV), a biomarker of early atheromatous disease. However, no data are available regarding weight loss achieved by very low calorie ketogenic diets (VLCKD) on VV and lipid-based atherogenic indices. A randomized clinical trial was performed to examine changes in adventitial VV density in 20 patients with moderate obesity who underwent a 6-month very low calorie ketogenic diet (VLCKD, 600-800 kcal/day), and 10 participants with hypocaloric diet based on the Mediterranean Diet (MedDiet, estimated reduction of 500 kcal on the usual intake). Contrast-enhanced carotid ultrasound was used to assess the VV. Body composition analysis was also used. The atherogenic index of plasma (log (triglycerides to high-density lipoprotein cholesterol ratio)) and the triglyceride-glucose index were calculated. Serum concentrations of soluble intercellular adhesion molecule 1 (sICAM-1), and soluble vascular cell adhesion molecule 1 (sVCAM-1) were measured. The impact of weight on quality of life-lite (IWQOL-Lite) questionnaire was administered. Participants of intervention groups displayed a similar VV values. Significant improvements of BMI (-5.3 [-6.9 to -3.6] kg/m2, p < 0.001), total body fat (-7.0 [-10.7 to -3.3] %, p = 0.003), and IWQOL-Lite score (-41.4 [-75.2 to -7.6], p = 0.027) were observed in VLCKD group in comparison with MedDiet group. Although after a 6-months follow-up period VV density (mean, right and left sides) did not change significantly in any group, participants in the VLCKD exhibited a significantly decrease both in their atherogenic index of plasma and serum concentration of sICAM-1. A 6-month intervention with VLCKD do not impact in the density of the adventitial VV in subjects with moderate obesity, but induces significant changes in markers of endothelial dysfunction and CV risk.
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Affiliation(s)
- Enric Sánchez
- Obesity, Diabetes and Metabolism (ODIM) Research Group, IRBLleida, University of Lleida, 25198 Lleida, Spain; (E.S.); (M.-D.S.); (M.B.)
| | - Maria-Dolores Santos
- Obesity, Diabetes and Metabolism (ODIM) Research Group, IRBLleida, University of Lleida, 25198 Lleida, Spain; (E.S.); (M.-D.S.); (M.B.)
- Endocrinology and Nutrition Department, Arnau de Vilanova University Hospital, 25198 Lleida, Spain;
| | | | - Marta Bueno
- Obesity, Diabetes and Metabolism (ODIM) Research Group, IRBLleida, University of Lleida, 25198 Lleida, Spain; (E.S.); (M.-D.S.); (M.B.)
- Endocrinology and Nutrition Department, Arnau de Vilanova University Hospital, 25198 Lleida, Spain;
| | - Ignacio Sajoux
- Pronokal Group, 08009 Barcelona, Spain; (M.N.-G.); (I.S.)
| | - Andree Yeramian
- Endocrinology and Nutrition Department, Arnau de Vilanova University Hospital, 25198 Lleida, Spain;
| | - Albert Lecube
- Obesity, Diabetes and Metabolism (ODIM) Research Group, IRBLleida, University of Lleida, 25198 Lleida, Spain; (E.S.); (M.-D.S.); (M.B.)
- Endocrinology and Nutrition Department, Arnau de Vilanova University Hospital, 25198 Lleida, Spain;
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
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Yang M, Khoukaz L, Qi X, Kimchi ET, Staveley-O’Carroll KF, Li G. Diet and Gut Microbiota Interaction-Derived Metabolites and Intrahepatic Immune Response in NAFLD Development and Treatment. Biomedicines 2021; 9:biomedicines9121893. [PMID: 34944709 PMCID: PMC8698669 DOI: 10.3390/biomedicines9121893] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/10/2021] [Accepted: 12/11/2021] [Indexed: 12/12/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) with pathogenesis ranging from nonalcoholic fatty liver (NAFL) to the advanced form of nonalcoholic steatohepatitis (NASH) affects about 25% of the global population. NAFLD is a chronic liver disease associated with obesity, type 2 diabetes, and metabolic syndrome, which is the most increasing factor that causes hepatocellular carcinoma (HCC). Although advanced progress has been made in exploring the pathogenesis of NAFLD and penitential therapeutic targets, no therapeutic agent has been approved by Food and Drug Administration (FDA) in the United States. Gut microbiota-derived components and metabolites play pivotal roles in shaping intrahepatic immunity during the progression of NAFLD or NASH. With the advance of techniques, such as single-cell RNA sequencing (scRNA-seq), each subtype of immune cells in the liver has been studied to explore their roles in the pathogenesis of NAFLD. In addition, new molecules involved in gut microbiota-mediated effects on NAFLD are found. Based on these findings, we first summarized the interaction of diet-gut microbiota-derived metabolites and activation of intrahepatic immunity during NAFLD development and progression. Treatment options by targeting gut microbiota and important molecular signaling pathways are then discussed. Finally, undergoing clinical trials are selected to present the potential application of treatments against NAFLD or NASH.
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Affiliation(s)
- Ming Yang
- Department of Surgery, University of Missouri, Columbia, MO 65212, USA; (M.Y.); (L.K.); (X.Q.); (E.T.K.)
| | - Lea Khoukaz
- Department of Surgery, University of Missouri, Columbia, MO 65212, USA; (M.Y.); (L.K.); (X.Q.); (E.T.K.)
| | - Xiaoqiang Qi
- Department of Surgery, University of Missouri, Columbia, MO 65212, USA; (M.Y.); (L.K.); (X.Q.); (E.T.K.)
| | - Eric T. Kimchi
- Department of Surgery, University of Missouri, Columbia, MO 65212, USA; (M.Y.); (L.K.); (X.Q.); (E.T.K.)
- Harry S. Truman Memorial VA Hospital, Columbia, MO 65201, USA
| | - Kevin F. Staveley-O’Carroll
- Department of Surgery, University of Missouri, Columbia, MO 65212, USA; (M.Y.); (L.K.); (X.Q.); (E.T.K.)
- Harry S. Truman Memorial VA Hospital, Columbia, MO 65201, USA
- Correspondence: (K.F.S.-O.); (G.L.)
| | - Guangfu Li
- Department of Surgery, University of Missouri, Columbia, MO 65212, USA; (M.Y.); (L.K.); (X.Q.); (E.T.K.)
- Harry S. Truman Memorial VA Hospital, Columbia, MO 65201, USA
- Department of Molecular Microbiology and Immunology, University of Missouri-Columbia, Columbia, MO 65212, USA
- Correspondence: (K.F.S.-O.); (G.L.)
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Kolb H, Kempf K, Röhling M, Lenzen-Schulte M, Schloot NC, Martin S. Ketone bodies: from enemy to friend and guardian angel. BMC Med 2021; 19:313. [PMID: 34879839 PMCID: PMC8656040 DOI: 10.1186/s12916-021-02185-0] [Citation(s) in RCA: 123] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 11/09/2021] [Indexed: 02/06/2023] Open
Abstract
During starvation, fasting, or a diet containing little digestible carbohydrates, the circulating insulin levels are decreased. This promotes lipolysis, and the breakdown of fat becomes the major source of energy. The hepatic energy metabolism is regulated so that under these circumstances, ketone bodies are generated from β-oxidation of fatty acids and secreted as ancillary fuel, in addition to gluconeogenesis. Increased plasma levels of ketone bodies thus indicate a dietary shortage of carbohydrates. Ketone bodies not only serve as fuel but also promote resistance to oxidative and inflammatory stress, and there is a decrease in anabolic insulin-dependent energy expenditure. It has been suggested that the beneficial non-metabolic actions of ketone bodies on organ functions are mediated by them acting as a ligand to specific cellular targets. We propose here a major role of a different pathway initiated by the induction of oxidative stress in the mitochondria during increased ketolysis. Oxidative stress induced by ketone body metabolism is beneficial in the long term because it initiates an adaptive (hormetic) response characterized by the activation of the master regulators of cell-protective mechanism, nuclear factor erythroid 2-related factor 2 (Nrf2), sirtuins, and AMP-activated kinase. This results in resolving oxidative stress, by the upregulation of anti-oxidative and anti-inflammatory activities, improved mitochondrial function and growth, DNA repair, and autophagy. In the heart, the adaptive response to enhanced ketolysis improves resistance to damage after ischemic insults or to cardiotoxic actions of doxorubicin. Sodium-dependent glucose co-transporter 2 (SGLT2) inhibitors may also exert their cardioprotective action via increasing ketone body levels and ketolysis. We conclude that the increased synthesis and use of ketone bodies as ancillary fuel during periods of deficient food supply and low insulin levels causes oxidative stress in the mitochondria and that the latter initiates a protective (hormetic) response which allows cells to cope with increased oxidative stress and lower energy availability. KEYWORDS: Ketogenic diet, Ketone bodies, Beta hydroxybutyrate, Insulin, Obesity, Type 2 diabetes, Inflammation, Oxidative stress, Cardiovascular disease, SGLT2, Hormesis.
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Affiliation(s)
- Hubert Kolb
- Faculty of Medicine, University of Duesseldorf, Moorenstr. 5, 40225, Duesseldorf, Germany.,West-German Centre of Diabetes and Health, Duesseldorf Catholic Hospital Group, Hohensandweg 37, 40591, Duesseldorf, Germany
| | - Kerstin Kempf
- West-German Centre of Diabetes and Health, Duesseldorf Catholic Hospital Group, Hohensandweg 37, 40591, Duesseldorf, Germany.
| | - Martin Röhling
- West-German Centre of Diabetes and Health, Duesseldorf Catholic Hospital Group, Hohensandweg 37, 40591, Duesseldorf, Germany
| | | | - Nanette C Schloot
- Faculty of Medicine, University of Duesseldorf, Moorenstr. 5, 40225, Duesseldorf, Germany
| | - Stephan Martin
- Faculty of Medicine, University of Duesseldorf, Moorenstr. 5, 40225, Duesseldorf, Germany.,West-German Centre of Diabetes and Health, Duesseldorf Catholic Hospital Group, Hohensandweg 37, 40591, Duesseldorf, Germany
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50
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Correa LL, Moretti A, de Sousa PAM, Dinis L, de Souza MF, Tostes I, Nuñez-Garcia M, Sajoux I. Effectiveness and Safety of a Very Low-Calorie Ketogenic Diet on Weight Regain Following Bariatric Surgery. Obes Surg 2021; 31:5383-5390. [PMID: 34558025 DOI: 10.1007/s11695-021-05703-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 08/31/2021] [Accepted: 09/02/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Obesity is one of the major public health problems worldwide and bariatric surgery is considered the gold standard treatment for severe obesity. Although the literature supports the safety and efficacy of the very low-calorie ketogenic diet (VLCKD) in patients with obesity, there is no study analyzing the use in case of failure or weight regain after bariatric surgery. This work has the purpose of assessing the response to a VLCKD (Pnk® method) in this population. METHODS We have conducted an observational, retrospective, and descriptive study with the analysis of medical charts of private offices where patients were examined between 2014 and 2019, totalizing 11 participants who underwent Roux-en-Y gastric bypass (RYGB) without a reduction of 50% in body weight excess or any weight regain after the surgery. The patients followed the first stage of a commercial weight loss program (Pnk® method) which consists of a VLCKD (600-800 kcal/day), low in carbohydrates and lipids. RESULTS A significant reduction was observed (p-value < 0.05) in weight, body mass index (BMI), abdominal circumference (AC), and glycated hemoglobin (A1C) post-ketogenic diet. Uric acid, transaminases, urea, and creatinine values did not show differences between pre- and post-ketosis. During the course of the study, no serious adverse events were reported. CONCLUSION This study has shown that the ketogenic diet can be recommended as an effective and safe treatment for patients who progressed with insufficient weight loss or regain after bariatric surgery.
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Affiliation(s)
- Livia Lugarinho Correa
- Serviço de Obesidade, Transtornos Alimentares E Metabologia (SOTAM), Instituto Estadual de Diabetes E Endocrinologia Luiz Capriglione, Rua Moncorvo Filho 90, CentroRio de Janeiro, CEP, 20211-340, Brazil.
| | - Adriana Moretti
- Clínica de Endocrinologia Adriana Moretti, São Paulo, Brazil
| | - Priscila Alves Medeiros de Sousa
- Serviço de Obesidade, Transtornos Alimentares E Metabologia (SOTAM), Instituto Estadual de Diabetes E Endocrinologia Luiz Capriglione, Rua Moncorvo Filho 90, CentroRio de Janeiro, CEP, 20211-340, Brazil
| | - Leticia Dinis
- Serviço de Obesidade, Transtornos Alimentares E Metabologia (SOTAM), Instituto Estadual de Diabetes E Endocrinologia Luiz Capriglione, Rua Moncorvo Filho 90, CentroRio de Janeiro, CEP, 20211-340, Brazil
| | - Mariana Fuganti de Souza
- Serviço de Obesidade, Transtornos Alimentares E Metabologia (SOTAM), Instituto Estadual de Diabetes E Endocrinologia Luiz Capriglione, Rua Moncorvo Filho 90, CentroRio de Janeiro, CEP, 20211-340, Brazil
| | - Isabel Tostes
- Serviço de Obesidade, Transtornos Alimentares E Metabologia (SOTAM), Instituto Estadual de Diabetes E Endocrinologia Luiz Capriglione, Rua Moncorvo Filho 90, CentroRio de Janeiro, CEP, 20211-340, Brazil
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