551
|
Mei H, Tu H. Vitamin C and Helicobacter pylori Infection: Current Knowledge and Future Prospects. Front Physiol 2018; 9:1103. [PMID: 30154733 PMCID: PMC6102328 DOI: 10.3389/fphys.2018.01103] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 07/23/2018] [Indexed: 12/15/2022] Open
Abstract
The gram-negative bacterium, Helicobacter pylori (H. pylori), infection is predominantly known for its strong association with development of gastric diseases, including gastritis, peptic ulcers, and stomach cancer. Numerous clinical reports show that ascorbic acid deficiency has been connect with gastritis. Vitamin C levels both in gastric acid and serum have constantly been affirmed to be low in subjects with H. pylori infected gastritis and peptic ulcers. Ascorbic acid supplementation likely relates to reduced incidences of bleeding from peptic ulcers and gastric cancer. H. pylori eradication is shown to increase vitamin C levels, while the benefits of ascorbic acid oral intake to increase the effectiveness of H. pylori-eradication therapy are controversial. Recent studies suggest that ascorbate intake intravenously, but not orally; pharmacologic ascorbate concentrations up to 30 mmol/L in blood, several millimolar in tissues as well as in interstitial fluid, are easily and safely achieved. Pharmacologic ascorbate can exert pro-oxidant effects locally as a drug by mediating hydrogen peroxide (H2O2) formation, which was applied to animal and clinical trials of cancer, sepsis, and severe burns etc. In this review, we summarize current understanding of the associations of vitamin C and H. pylori infection, and outline some potential strategies for H. pylori intervention from emerging advances on ascorbic acid physiology and pharmacology.
Collapse
Affiliation(s)
- Haixin Mei
- Department of Gastroenterology, Xinyang Central Hospital, Xinyang, China
| | - Hongbin Tu
- National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD, United States
| |
Collapse
|
552
|
MuellerCM, ed. The ASPEN Adult Nutrition Support Core Curriculum. 3rd ed. Silver Spring, MD: American Society for Parenteral and Enteral Nutrition; 2017. $280.00. 845 pp. Print ISBN: 978-1-889622-31-6; e-book ISBN: 978-1-889622-32-3. Nutr Clin Pract 2018. [DOI: 10.1002/ncp.10114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
553
|
Jentzer JC, Vallabhajosyula S, Khanna AK, Chawla LS, Busse LW, Kashani KB. Management of Refractory Vasodilatory Shock. Chest 2018; 154:416-426. [DOI: 10.1016/j.chest.2017.12.021] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 12/18/2017] [Accepted: 12/21/2017] [Indexed: 12/24/2022] Open
|
554
|
Abstract
PURPOSE OF REVIEW Hypovitaminosis C and vitamin C deficiency are very common in critically ill patients due to increased needs and decreased intake. Because vitamin C has pleiotropic functions, deficiency can aggravate the severity of illness and hamper recovery. RECENT FINDINGS Vitamin C is a key circulating antioxidant with anti-inflammatory and immune-supporting effects, and a cofactor for important mono and dioxygenase enzymes. An increasing number of preclinical studies in trauma, ischemia/reperfusion, and sepsis models show that vitamin C administered at pharmacological doses attenuates oxidative stress and inflammation, and restores endothelial and organ function. Older studies showed less organ dysfunction when vitamin C was administered in repletion dose (2-3 g intravenous vitamin C/day). Recent small controlled studies using pharmacological doses (6-16 g/day) suggest that vitamin C reduces vasopressor support and organ dysfunction, and may even decrease mortality. SUMMARY A short course of intravenous vitamin C in pharmacological dose seems a promising, well tolerated, and cheap adjuvant therapy to modulate the overwhelming oxidative stress in severe sepsis, trauma, and reperfusion after ischemia. Large randomized controlled trials are necessary to provide more evidence before wide-scale implementation can be recommended.
Collapse
Affiliation(s)
- Angélique M E Spoelstra-de Man
- Department of Intensive Care Medicine, Research VUmc Intensive Care (REVIVE), Amsterdam Cardiovascular Sciences (ACS), Amsterdam Infection and Immunity Institute (AI&II), VU University Medical Center Amsterdam, Amsterdam, The Netherlands
| | | | | |
Collapse
|
555
|
Turnbull AE, Sahetya SK, Biddison ELD, Hartog CS, Rubenfeld GD, Benoit DD, Guidet B, Gerritsen RT, Tonelli MR, Curtis JR. Competing and conflicting interests in the care of critically ill patients. Intensive Care Med 2018; 44:1628-1637. [PMID: 30046872 DOI: 10.1007/s00134-018-5326-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 07/16/2018] [Indexed: 12/26/2022]
Abstract
Medical professionals are expected to prioritize patient interests, and most patients trust physicians to act in their best interest. However, a single patient is never a physician's sole concern. The competing interests of other patients, clinicians, family members, hospital administrators, regulators, insurers, and trainees are omnipresent. While prioritizing patient interests is always a struggle, it is especially challenging and important in the ICU setting where most patients lack the ability to advocate for themselves or seek alternative sources of care. This review explores factors that increase the risk, or the perception, that an ICU physician will reason, recommend, or act in a way that is not in their patient's best interest and discusses steps that could help minimize the impact of these factors on patient care.
Collapse
Affiliation(s)
- Alison E Turnbull
- Division of Pulmonary and Critical Care Medicine, School of Medicine, Johns Hopkins University, 1830 E. Monument St, 5th Floor, Baltimore, MD, 21205, USA. .,Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA. .,Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University, Baltimore, MD, USA.
| | - Sarina K Sahetya
- Division of Pulmonary and Critical Care Medicine, School of Medicine, Johns Hopkins University, 1830 E. Monument St, 5th Floor, Baltimore, MD, 21205, USA
| | - E Lee Daugherty Biddison
- Division of Pulmonary and Critical Care Medicine, School of Medicine, Johns Hopkins University, 1830 E. Monument St, 5th Floor, Baltimore, MD, 21205, USA
| | - Christiane S Hartog
- Department for Anesthesiology and Intensive Care, Jena University Hospital, Jena, Germany.,Department of Anaesthesiology and Operative Intensive Care Medicine, Charité Universitätsmedizin Berlin, Kreischa, Germany.,Patient- and Family-Centered Care, Klinik Bavaria, Kreischa, Germany
| | - Gordon D Rubenfeld
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada.,Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | | | - Bertrand Guidet
- Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, Service de Réanimation Médicale, Paris, France.,Sorbonne Universités, Université Pierre et Marie Curie, Paris, France.,Institut National de la Santé et de la Recherche Médicale (INSERM), UMR S 1136, Institut Pierre Louis d'Épidémiologie et de Santé Publique, Paris, France
| | - Rik T Gerritsen
- Department of Intensive Care, Medisch Centrum Leeuwarden, Leeuwarden, The Netherlands
| | - Mark R Tonelli
- Department of Bioethics and Humanities, University of Washington, Seattle, WA, USA.,Division of Pulmonary, Critical Care, and Sleep Medicine, University of Washington, Seattle, WA, USA
| | - J Randall Curtis
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Washington, Seattle, WA, USA.,Cambia Palliative Care Center of Excellence, University of Washington, Seattle, WA, USA
| |
Collapse
|
556
|
Marik PE. Patterns of Death in Patients with Sepsis and the Use of Hydrocortisone, Ascorbic Acid, and Thiamine to Prevent These Deaths. Surg Infect (Larchmt) 2018; 19:812-820. [PMID: 30040533 DOI: 10.1089/sur.2018.111] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background: In general, patients with sepsis die from the host response to the infecting pathogen rather than from the infecting pathogen itself. Four patterns of death have been identified in sepsis, namely vasoplegic shock, single-organ respiratory failure (acute respiratory distress syndrome [ARDS]), multi-system organ failure (MSOF), and persistent MSOF with ongoing inflammation and immunosuppression with recurrent infections (persistent inflammation-immunosuppression and catabolism syndrome [PICS]). To improve the outcome of sepsis adjunctive therapies that modulate the immune system have been tested; these therapies that have targeted specific molecules or pathways have universally failed. Conclusion: We propose that the combination of hydrocortisone, intravenous ascorbic acid, and thiamine (HAT therapy), which synergistically targets multiple pathways, restores the dysregulated immune system and organ injury, and reduces the risk of death and organ failure following sepsis.
Collapse
Affiliation(s)
- Paul E Marik
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School , Norfolk, Virginia
| |
Collapse
|
557
|
Efficacy of Ascorbic Acid Supplementation in Relief of Symptoms Due to Febrile Upper Urinary Tract Infection in Children, a Clinical Trial and Hospital Based Study. ARCHIVES OF PEDIATRIC INFECTIOUS DISEASES 2018. [DOI: 10.5812/pedinfect.57071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
558
|
The role of glucocorticoids as adjunctive treatment for sepsis in the modern era. THE LANCET RESPIRATORY MEDICINE 2018; 6:793-800. [PMID: 30006071 DOI: 10.1016/s2213-2600(18)30265-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 06/06/2018] [Accepted: 06/13/2018] [Indexed: 12/12/2022]
Abstract
Glucocorticoids have been used as adjunctive therapy in patients with sepsis and septic shock for more than four decades. The rationale for the use of glucocorticoids is that this class of drugs downregulates the proinflammatory response and limits the anti-inflammatory response while preserving innate immunity. Between 1976 and 2017, 22 randomised placebo-controlled trials have been published evaluating the benefit of glucocorticoids in patients with community-acquired pneumonia, sepsis, and septic shock. These studies produced conflicting results. In 2018, two large randomised controlled trials (RCTs) were published evaluating the role of hydrocortisone in patients with septic shock. The Activated Protein C and Corticosteroids for Human Septic Shock (APROCCHSS) trial reported a reduction in 90-day mortality whereas the Adjunctive Corticosteroid Treatment in Critically Ill Patients with Septic Shock (ADRENAL) trial reported no mortality benefit. This Viewpoint critically appraises these two RCTs and evaluates the use of glucocorticoids in the treatment of sepsis and septic shock in the modern era.
Collapse
|
559
|
A review of micronutrients in sepsis: the role of thiamine, l-carnitine, vitamin C, selenium and vitamin D. Nutr Res Rev 2018; 31:281-290. [PMID: 29984680 DOI: 10.1017/s0954422418000124] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Sepsis is defined as the dysregulated host response to an infection resulting in life-threatening organ dysfunction. The metabolic demand from inefficiencies in anaerobic metabolism, mitochondrial and cellular dysfunction, increased cellular turnover, and free-radical damage result in the increased focus of micronutrients in sepsis as they play a pivotal role in these processes. In the present review, we will evaluate the potential role of micronutrients in sepsis, specifically, thiamine, l-carnitine, vitamin C, Se and vitamin D. Each micronutrient will be reviewed in a similar fashion, discussing its major role in normal physiology, suspected role in sepsis, use as a biomarker, discussion of the major basic science and human studies, and conclusion statement. Based on the current available data, we conclude that thiamine may be considered in all septic patients at risk for thiamine deficiency and l-carnitine and vitamin C to those in septic shock. Clinical trials are currently underway which may provide greater insight into the role of micronutrients in sepsis and validate standard utilisation.
Collapse
|
560
|
Lambden S, Creagh-Brown BC, Hunt J, Summers C, Forni LG. Definitions and pathophysiology of vasoplegic shock. Crit Care 2018; 22:174. [PMID: 29980217 PMCID: PMC6035427 DOI: 10.1186/s13054-018-2102-1] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/19/2018] [Indexed: 12/18/2022] Open
Abstract
Vasoplegia is the syndrome of pathological low systemic vascular resistance, the dominant clinical feature of which is reduced blood pressure in the presence of a normal or raised cardiac output. The vasoplegic syndrome is encountered in many clinical scenarios, including septic shock, post-cardiac bypass and after surgery, burns and trauma, but despite this, uniform clinical definitions are lacking, which renders translational research in this area challenging. We discuss the role of vasoplegia in these contexts and the criteria that are used to describe it are discussed. Intrinsic processes which may drive vasoplegia, such as nitric oxide, prostanoids, endothelin-1, hydrogen sulphide and reactive oxygen species production, are reviewed and potential for therapeutic intervention explored. Extrinsic drivers, including those mediated by glucocorticoid, catecholamine and vasopressin responsiveness of the blood vessels, are also discussed. The optimum balance between maintaining adequate systemic vascular resistance against the potentially deleterious effects of treatment with catecholamines is as yet unclear, but development of novel vasoactive agents may facilitate greater understanding of the role of the differing pathways in the development of vasoplegia. In turn, this may provide insights into the best way to care for patients with this common, multifactorial condition.
Collapse
Affiliation(s)
- Simon Lambden
- University of Cambridge, Cambridge, UK
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Ben C. Creagh-Brown
- Surrey Perioperative Anaesthetic Critical care collaborative group (SPACeR), Intensive Care, Royal Surrey County Hospital NHS Foundation Trust, Guildford, UK
- Department of Clinical and Experimental Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Julie Hunt
- Department of Clinical and Experimental Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Charlotte Summers
- University of Cambridge, Cambridge, UK
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Lui G. Forni
- Surrey Perioperative Anaesthetic Critical care collaborative group (SPACeR), Intensive Care, Royal Surrey County Hospital NHS Foundation Trust, Guildford, UK
- Department of Clinical and Experimental Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| |
Collapse
|
561
|
Kim WY, Jo EJ, Eom JS, Mok J, Kim MH, Kim KU, Park HK, Lee MK, Lee K. Combined vitamin C, hydrocortisone, and thiamine therapy for patients with severe pneumonia who were admitted to the intensive care unit: Propensity score-based analysis of a before-after cohort study. J Crit Care 2018; 47:211-218. [PMID: 30029205 DOI: 10.1016/j.jcrc.2018.07.004] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/28/2018] [Accepted: 07/03/2018] [Indexed: 11/19/2022]
Abstract
PURPOSE To evaluate the efficacy of combined vitamin C, hydrocortisone, and thiamine in patients with severe pneumonia. MATERIALS AND METHODS All consecutive patients with severe pneumonia who were treated with the vitamin C protocol (6 g of vitamin C per day) in June 2017-January 2018 (n = 53) were compared to all consecutive patients with severe pneumonia who were treated in June 2016-January 2017 (n = 46). Propensity score analysis was used to adjust for potential baseline differences between the groups. RESULTS In the propensity-matched cohort (n = 36/group), the treated patients had significantly less hospital mortality than the control group (17% vs. 39%; P = 0.04). The vitamin C protocol associated independently with decreased mortality in propensity score-adjusted analysis (adjusted odds ratio = 0.15, 95% confidence interval = 0.04-0.56, P = 0.005). Relative to the control group, the treatment group had a significantly higher median improvement in the radiologic score at day 7 compared with baseline (4 vs. 2; P = 0.045). The vitamin C protocol did not increase the rates of acute kidney injury or superinfection. CONCLUSIONS Combined vitamin C, hydrocortisone, and thiamine therapy may benefit patients with severe pneumonia.
Collapse
Affiliation(s)
- Won-Young Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea; Biomedical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Eun-Jung Jo
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Jung Seop Eom
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Jeongha Mok
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Mi-Hyun Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Ki Uk Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Hye-Kyung Park
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Min Ki Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| | - Kwangha Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea; Biomedical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea.
| |
Collapse
|
562
|
Abstract
PURPOSE OF REVIEW We reviewed the recent advances in the initial approach to resuscitation of sepsis and septic shock patients. RECENT FINDINGS Sepsis and septic shock are life-threatening emergencies. Two key interventions in the first hour include timely antibiotic therapy and resuscitation. Before any laboratory results, the need for resuscitation is considered if a patient with suspected infection has low blood pressure (BP) or impaired peripheral circulation found at clinical examination. Until now, this early resuscitation in sepsis and septic shock was supported by improvements in outcome seen with goal-directed therapy. However, three recent, goal-directed therapy trials failed to replicate the originally reported mortality reductions, prompting a debate on how this early resuscitation should be performed. As resuscitation is often focussed on macrociculatory goals such as optimizing central venous pressure, the discordance between microcirculatory and macrocirculatory optimization during resuscitation is a potential argument for the lack of outcome benefit in the newer trials. Vasoactive drug dose and large volume resuscitation-associated-positive fluid balance, are independently associated with worse clinical outcomes in critically ill sepsis and septic shock patients. As lower BP targets and restricted volume resuscitation are feasible and well tolerated, should we consider a lower BP target to reduce the adverse effects of catecholamine' and excess resuscitation fluids. Evidence guiding fluids, vasopressor, and inotrope selection remains limited. SUMMARY Though the early resuscitation of sepsis and septic shock is key to improving outcomes, ideal resuscitation targets are elusive. Distinction should be drawn between microcirculatory and macrocirculatory changes, and corresponding targets. Common components of resuscitation bundles such as large volume resuscitation and high-dose vasopressors may not be universally beneficial. Microcirculatory targets, individualized resuscitation goals, and reassessment of completed trials using the updated septic shock criteria should be focus areas for future research.
Collapse
|
563
|
|
564
|
Mesenchymal stromal cell-derived extracellular vesicles: regenerative and immunomodulatory effects and potential applications in sepsis. Cell Tissue Res 2018; 374:1-15. [PMID: 29955951 DOI: 10.1007/s00441-018-2871-5] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 05/20/2018] [Indexed: 12/13/2022]
Abstract
Mesenchymal stromal (stem) cells (MSCs) have multipotent differentiation capacity and exist in nearly all forms of post-natal organs and tissues. The immunosuppressive and anti-inflammatory properties of MSCs have made them an ideal candidate in the treatment of diseases, such as sepsis, in which inflammation plays a critical role. One of the key mechanisms of MSCs appears to derive from their paracrine activity. Recent studies have demonstrated that MSC-derived extracellular vesicles (MSC-EVs) are at least partially responsible for the paracrine effect. MSC-EVs transfer molecules (such as proteins/peptides, mRNA, microRNA and lipids) with immunoregulatory properties to recipient cells. MSC-EVs have been shown to mimic MSCs in alleviating sepsis and may serve as an alternative to whole cell therapy. Compared with MSCs, MSC-EVs may offer specific advantages due to lower immunogenicity and higher safety profile. The first two sections of the review discuss the preclinical and clinical findings of MSCs in sepsis. Next, we review the characteristics of EVs and MSC-EVs. Then, we summarize the mechanisms of MSC-EVs, including tissue regeneration and immunomodulation. Finally, our review presents the evidences that MSC-EVs are effective in treating models of sepsis. In conclusion, MSC-EVs may have the potential to become a novel therapeutic strategy for sepsis.
Collapse
|
565
|
Low-dose corticosteroids and septic shock resolution: implications for randomized trial design? Intensive Care Med 2018; 44:1366-1367. [PMID: 29955923 DOI: 10.1007/s00134-018-5265-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 06/04/2018] [Indexed: 01/14/2023]
|
566
|
Emerging Adjunctive Approach for the Treatment of Sepsis: Vitamin C and Thiamine. Crit Care Nurs Clin North Am 2018; 30:343-351. [PMID: 30098738 DOI: 10.1016/j.cnc.2018.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Evidence is emerging that parenteral administration of high-dose vitamin C and thiamine may be a beneficial adjuvant therapy of severe sepsis and septic shock. Despite modern practices in critical care medicine, sepsis and severe sepsis remain a leading cause of morbidity and mortality in the critical care unit.
Collapse
|
567
|
Attaluri P, Castillo A, Edriss H, Nugent K. Thiamine Deficiency: An Important Consideration in Critically Ill Patients. Am J Med Sci 2018; 356:382-390. [PMID: 30146080 DOI: 10.1016/j.amjms.2018.06.015] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 10/28/2022]
Abstract
Thiamine is an essential cofactor for 4 enzymes involved in the production of energy (ATP) and the synthesis of essential cellular molecules. The total body stores of thiamine are relatively small, and thiamine deficiency can develop in patients secondary to inadequate nutrition, alcohol use disorders, increased urinary excretion and acute metabolic stress. Patients with sepsis are frequently thiamine deficient, and patients undergoing surgical procedures can develop thiamine deficiency. This deficiency can cause congestive heart failure, peripheral neuropathy, Wernicke's encephalopathy, Korsakoff's syndrome and gastrointestinal beriberi. In addition, thiamine deficiency can contribute to the development of intensive care unit complications, such as heart failure, delirium, critical care neuropathy, gastrointestinal dysfunction and unexplained lactic acidosis. Consequently, clinicians need to consider thiamine deficiency in patients admitted to intensive care units and the development of thiamine deficiency during the management of critically ill patients. Intravenous thiamine can correct lactic acidosis, improve cardiac function and treat delirium.
Collapse
Affiliation(s)
- Pradeep Attaluri
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Austin Castillo
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Hawa Edriss
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Kenneth Nugent
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas.
| |
Collapse
|
568
|
Jain S. Sepsis: An Update on Current Practices in Diagnosis and Management. Am J Med Sci 2018; 356:277-286. [PMID: 30286823 DOI: 10.1016/j.amjms.2018.06.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 06/05/2018] [Accepted: 06/08/2018] [Indexed: 12/15/2022]
Abstract
Despite several advancements in care over the last few decades, sepsis continues to carry a high morbidity and mortality burden in the United States. With its varied presentations, cases of sepsis are likely to be encountered by general practitioners in both inpatient and outpatient settings. In the recent years, there has been much debate about the appropriate criteria to diagnose patients with sepsis with a concurrent change in management guidelines. This article reviews definitions, diagnosis and treatment guidelines in current practice in the management of patients with sepsis.
Collapse
Affiliation(s)
- Snigdha Jain
- Division of Hospital Medicine, UT Southwestern Medical Center, Dallas, Texas.
| |
Collapse
|
569
|
No Reported Renal Stones with Intravenous Vitamin C Administration: A Prospective Case Series Study. Antioxidants (Basel) 2018; 7:antiox7050068. [PMID: 29883396 PMCID: PMC5981254 DOI: 10.3390/antiox7050068] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/11/2018] [Accepted: 05/19/2018] [Indexed: 12/12/2022] Open
Abstract
A few cases associating high dose intravenous vitamin C (IVC) administration with renal stone formation have been reported in the literature, however, no long-term studies investigating IVC administration and reported renal stones have been carried out. Our aim was to measure the frequency of reported renal stones in patients receiving IVC therapy. We carried out a prospective case series study of 157 adult patients who commenced IVC therapy at Integrated Health Options clinic between 1 September 2011 and 31 August 2012, with follow-up for 12 months. Inquiries into the occurrence of renal stones were conducted at enrolment, 6 and 12 months, and renal function blood tests were conducted at enrolment, 4 weeks and every 12 weeks thereafter in a subgroup of patients. No renal stones were reported by any patients in the study, despite 8% of the patients having a history of renal stones. In addition, the majority of patients investigated had stable renal function during the study period as evidenced by little change in serum creatinine levels and estimated glomerular filtration rate (eGFR) following IVC. In conclusion, IVC therapy was not associated with patient-reported renal stones. Although not the primary focus of this study, it was also observed that there was no significant change in mean serum creatinine or eGFR for those who had follow-up renal function blood tests.
Collapse
|
570
|
A Case of Factitious Hyperglycemia in a Patient on Intravenous Ascorbic Acid. Case Rep Endocrinol 2018; 2018:7063137. [PMID: 29862091 PMCID: PMC5976960 DOI: 10.1155/2018/7063137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 04/12/2018] [Indexed: 01/05/2023] Open
Abstract
Finger stick blood glucose meters are widely used in outpatient and inpatient settings. However, various factors can affect accuracy of readings from these meters. Here we present a patient who had spurious glucose elevation on these meters while being on intravenous ascorbic acid.
Collapse
|
571
|
Kumar V. T cells and their immunometabolism: A novel way to understanding sepsis immunopathogenesis and future therapeutics. Eur J Cell Biol 2018; 97:379-392. [PMID: 29773345 DOI: 10.1016/j.ejcb.2018.05.001] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 03/03/2018] [Accepted: 05/03/2018] [Indexed: 02/08/2023] Open
Abstract
Sepsis has always been considered as a big challenge for pharmaceutical companies in terms of discovering and designing new therapeutics. The pathogenesis of sepsis involves aberrant activation of innate immune cells (i.e. macrophages, neutrophils etc.) at early stages. However, a stage of immunosuppression is also observed during sepsis even in the patients who have recovered from it. This stage of immunosuppression is observed due to the loss of conventional (i.e. CD4+, CD8+) T cells, Th17 cells and an upregulation of regulatory T cells (Tregs). This process also impacts metabolic processes controlling immune cell metabolism called immunometabolism. The present review is focused on the T cell-mediated immune response, their immunometabolism and targeting T cell immunometabolism during sepsis as future therapeutic approach. The first part of the manuscripts describes an impact of sepsis on conventional T cells, Th17 cells and Tregs along with their impact on sepsis. The subsequent section further describes the immunometabolism of these cells (CD4+, CD8+, Th17, and Tregs) under normal conditions and during sepsis-induced immunosuppression. The article ends with the therapeutic targeting of T cell immunometabolism (both conventional T cells and Tregs) during sepsis as a future immunomodulatory approach for its management.
Collapse
Affiliation(s)
- V Kumar
- Children's Health Queensland Clinical Unit, School of Clinical Medicine, Mater Research, Faculty of Medicine, University of Queensland, St. Lucia, Brisbane, Queensland 4078, Australia; School of Biomedical Sciences, Faculty of Medicine, University of Queensland, St. Lucia, Brisbane, Queensland 4078, Australia.
| |
Collapse
|
572
|
Druml W, Joannidis M, John S, Jörres A, Schmitz M, Kielstein J, Kindgen-Milles D, Oppert M, Schwenger V, Willam C, Zarbock A. [Metabolic management and nutrition in critically ill patients with renal dysfunction : Recommendations from the renal section of the DGIIN, ÖGIAIN, and DIVI]. Med Klin Intensivmed Notfmed 2018; 113:393-400. [PMID: 29725741 DOI: 10.1007/s00063-018-0427-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 03/19/2018] [Indexed: 01/22/2023]
Abstract
BACKGROUND Intensive care patients with renal failure or insufficiency comprise a heterogeneous group of subjects with widely differing metabolic patterns and nutritional requirements. They include subjects with various stages of acute kidney injury (AKI), acute-on-chronic renal failure (A-CKD), without/with renal replacement therapy (RRT), chronic kidney disease (CKD), and subjects on regular hemodialysis or peritoneal dialysis therapy (HD/PD). GOALS Development of recommendations by the renal section of DGIIN (Deutsche Gesellschaft für Internistische Intensivmedizin und Notfallmedizin), ÖGIAIN (Österreichische Gesellschaft für Internistische und Allgemeine Intensivmedizin und Notfallmedizin) and DIVI (Deutsche Interdisziplinäre Vereinigung für Intensiv- und Notfallmedizin) for the metabolic management and the planning, indication, implementation, and monitoring of nutrition therapy in this heterogeneous group of patients. MATERIALS AND METHODS The recommendations are based on recent evidence and current recommendations of DGEM (Deutsche Gesellschaft für Ernährungsmedizin), ASPEN (American Society for Parenteral and Enteral Nutrition) and ESPEN (European Society for Clinical Nutrition and Metabolism) and also the KDGIO (Kidney Disease: Improving Global Outcomes) clinical practice guidelines for AKI and the expert knowledge and clinical experience of the authors. RESULTS Nutrition support in these patient groups is not fundamentally different from that in other disease states but must consider the multiple variations in metabolism and nutrient requirements. Nutrition therapy must be adapted to the stage of disease and especially, in those patients on RRT. Nutritional needs can differ widely between patients but also in the same patient during the course of the disease. CONCLUSIONS Thus, the patient with renal failure requires an individualized approach in nutrition support and because of the altered metabolism of many nutrients and intolerances for electrolytes and fluids, the nutrition support in patients with renal insufficiency requires close clinical and laboratory monitoring.
Collapse
Affiliation(s)
- W Druml
- Klinik für Innere Medizin III, Abteilung für Nephrologie, Allgemeines Krankenhaus Wien, Währinger Gürtel 18-20, 1090, Wien, Österreich.
| | - M Joannidis
- Gemeinsame Einrichtung Internistische Intensiv- und Notfallmedizin, Department für Innere Medizin, Medizinische Universität Innsbruck, Innsbruck, Österreich
| | - S John
- Abteilung Internistische Intensivmedizin, Medizinische Klinik 8, Paracelsus Medizinische Privatuniverstität Nürnberg, Universität Erlangen-Nürnberg, Klinikum Nürnberg-Süd, Nürnberg, Deutschland
| | - A Jörres
- Medizinische Klinik I für Nephrologie, Transplantationsmedizin und internistische Intensivmedizin, Klinikum der Universität Witten/Herdecke, Köln-Merheim, Deutschland
| | - M Schmitz
- Klinik für Nephrologie, Städtisches Klinikum Solingen, Solingen, Deutschland
| | - J Kielstein
- Medizinische Klinik V, Nephrologie | Rheumatologie | Blutreinigungsverfahren, Städtisches Klinikum Braunschweig, Braunschweig, Deutschland
| | - D Kindgen-Milles
- Klinik für Anästhesiologie Universitätsklinikum Düsseldorf, Heinrich-Heine-Universität, Düsseldorf, Deutschland
- Medizinische Klinik, Abteilung Klinische Pharmakologie und Pharmakoepidemiologie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - M Oppert
- Klinik für Notfall- und internistische Intensivmedizin, Klinikum Ernst von Bergmann, Potsdam, Deutschland
| | - V Schwenger
- Klinik für Nieren‑, Hochdruck- und Autoimmunerkrankungen, Klinikum Stuttgart, Stuttgart, Deutschland
| | - C Willam
- Medizinische Klinik 4, Nephrologie und Hypertensiologie, Erlangen, Deutschland
| | - A Zarbock
- Klinik für Anästhesiologie, operative Intensivmedizin und Schmerztherapie, Albert-Schweitzer-Campus 1, Gebäude A1, 48149, Münster, Deutschland
| |
Collapse
|
573
|
Blythe R, Cook D, Graves N. Scepticaemia: The impact on the health system and patients of delaying new treatments with uncertain evidence; a case study of the sepsis bundle. F1000Res 2018; 7:500. [PMID: 29904596 PMCID: PMC5989143 DOI: 10.12688/f1000research.14619.2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/03/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND A sepsis care bundle of intravenous vitamin C, thiamine, and hydrocortisone was reported to improve treatment outcomes. The data to support it are uncertain and decision makers are likely to be cautious about adopting it. The objective of this study was to model the opportunity costs in dollars and lives of waiting for better information before adopting the bundle. METHODS A decision tree was built using information from the literature. We modelled the impact of bundle adoption under three scenarios using a simulation in which the bundle was effective as reported in the primary trial, less effective based on other information, and ineffective. The measurements were health services costs, quality-adjusted life years, and transition probabilities. RESULTS If the bundle proves to be effective under either scenario, it will save billions of dollars and millions of life-years in the United States. This is the opportunity cost of delaying an adoption decision and waiting for better quality evidence. We suggest that hospital decision-makers consider implementing the bundle on a trial basis while monitoring costs and outcomes data even while the evidence base is uncertain. CONCLUSIONS If the decision maker is unwilling to use the best available evidence now, but rather wishes to wait for definitive evidence they are risking incurring large costs for health care systems and for the patients they serve. An explicit analysis of uncertain clinical outcomes is a useful adjunct to guide decision making where there is clinical ambiguity. This approach offers a valid alternative to the default of clinical inactivity when faced with uncertainty.
Collapse
Affiliation(s)
- Robin Blythe
- Australian Centre for Health Services Innovation, School of Public Health and Social Work, Institute for Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| | - David Cook
- Intensive Care Unit, Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | - Nicholas Graves
- Australian Centre for Health Services Innovation, School of Public Health and Social Work, Institute for Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
| |
Collapse
|
574
|
Shaefi S, Mittel A, Klick J, Evans A, Ivascu NS, Gutsche J, Augoustides JG. Vasoplegia After Cardiovascular Procedures—Pathophysiology and Targeted Therapy. J Cardiothorac Vasc Anesth 2018; 32:1013-1022. [DOI: 10.1053/j.jvca.2017.10.032] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Indexed: 11/11/2022]
|
575
|
Affiliation(s)
- Paul E Marik
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, Norfolk, VA, USA
| |
Collapse
|
576
|
Gotur DB. Sepsis in a Panorama: What the Cardiovascular Physician Should Know. Methodist Debakey Cardiovasc J 2018; 14:89-100. [PMID: 29977465 PMCID: PMC6027712 DOI: 10.14797/mdcj-14-2-89] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Sepsis accounts for an estimated 30 million cases and 6 million deaths globally each year. According to a multidisciplinary task force convened by the Society of Critical Care Medicine and European Society of Intensive Care Medicine, sepsis is defined as life-threatening organ dysfunction due to a dysregulated host response to infection. Sepsis is a medical emergency, so much so that the World Health Organization made it a global health priority. Since patients with cardiovascular diseases have unique risk factors for sepsis, prompt and accurate diagnosis is critical. In this regard, the sepsis-specific Sequential Organ Failure Assessment (SOFA) helps clinicians identify the organ dysfunction and predict outcomes. Sepsis management is grouped into specific interventions called bundles, and completion of each bundle element is time sensitive. The U.S. Centers for Medicaid and Medicare Services and some state-specific regulations have made compliance with these bundles reportable as a quality measure. The updated Surviving Sepsis Campaign Hour-1 bundle recommends that lactate measurement, blood cultures procurement, broad spectrum antibiotics administration, resuscitation with 30 mL/kg crystalloid, and vasopressor initiation for hypotension all be initiated within 1 hour of time zero, which is from the time of triage in the emergency department or from sepsis diagnosis. Septic shock is defined as hypotension with a mean arterial pressure less than 65 mm Hg, requiring vasopressors despite adequate fluid resuscitation and/or lactic acid levels above 2 mmol/L. Both fluid resuscitation and clinical re-evaluation with lactate measurement guide the fluid and vasopressor therapy. Specific guidelines exist for organ support that address mechanical ventilation, blood transfusions, vasopressor choices, and nutrition.
Collapse
|
577
|
Bissell BD, Browder K, McKenzie M, Flannery AH. A Blast From the Past: Revival of Angiotensin II for Vasodilatory Shock. Ann Pharmacother 2018; 52:920-927. [PMID: 29582666 DOI: 10.1177/1060028018767899] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE To review and summarize data on angiotensin II (AT-II), approved by the Food and Drug Administration (FDA) in December 2017 to increase blood pressure in adults with septic or other distributive shock. DATA SOURCES A PubMed/MEDLINE search was conducted using the following terms: (angiotensin ii OR angiotensin 2) AND (shock) from 1966 to February 2018. STUDY SELECTION AND DATA EXTRACTION A total of 691 citations were reviewed with only relevant clinical data extracted. DATA SYNTHESIS AT-II is a peptide hormone with a multitude of physiological effects-namely, vasoconstriction of venous and arterial smooth muscle. The priority approval granted by the FDA was secondary to a phase 3 study of patients receiving at least 0.2 µg/kg/min of norepinephrine or equivalent for vasodilatory shock. Compared with placebo, AT-II had a significantly higher rate of response, defined as a mean arterial pressure of 75 mm Hg or an increase of 10 mm Hg. No significant difference was found in death by day 28. CONCLUSIONS AT-II is a newly available vasoactive agent with a novel mechanism for the treatment of distributive shock. Further research is needed to define its exact role in therapy of shock states, identify patients most likely to benefit, and further study its safety profile in critical illness.
Collapse
Affiliation(s)
- Brittany D Bissell
- 1 University of Kentucky Medical Center, Lexington, KY, USA.,2 University of Kentucky College of Pharmacy, Lexington, KY, USA
| | - Kelsey Browder
- 1 University of Kentucky Medical Center, Lexington, KY, USA
| | - Matt McKenzie
- 1 University of Kentucky Medical Center, Lexington, KY, USA
| | - Alexander H Flannery
- 1 University of Kentucky Medical Center, Lexington, KY, USA.,2 University of Kentucky College of Pharmacy, Lexington, KY, USA
| |
Collapse
|
578
|
Yeung J, Gillies MA, Pearse RM. Pragmatic trials in peri-operative medicine: why, when and how? Anaesthesia 2018; 73:803-807. [PMID: 29577235 DOI: 10.1111/anae.14252] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- J Yeung
- Warwick Medical School, University of Warwick, Warwick, UK
| | - M A Gillies
- Department of Anaesthesia, Critical Care and Pain Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - R M Pearse
- Intensive Care, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| |
Collapse
|
579
|
Spoelstra-de Man AME, Elbers PWG, Oudemans-van Straaten HM. Making sense of early high-dose intravenous vitamin C in ischemia/reperfusion injury. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2018; 22:70. [PMID: 29558975 PMCID: PMC5861638 DOI: 10.1186/s13054-018-1996-y] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This article is one of ten reviews selected from the Annual Update in Intensive Care and Emergency Medicine 2018. Other selected articles can be found online at https://www.biomedcentral.com/collections/annualupdate2018. Further information about the Annual Update in Intensive Care and Emergency Medicine is available from http://www.springer.com/series/8901.
Collapse
Affiliation(s)
- Angelique M E Spoelstra-de Man
- VU University Medical Center Amsterdam, Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands.
| | - Paul W G Elbers
- VU University Medical Center Amsterdam, Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands
| | - Heleen M Oudemans-van Straaten
- VU University Medical Center Amsterdam, Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands
| |
Collapse
|
580
|
Amrein K, Oudemans-van Straaten HM, Berger MM. Vitamin therapy in critically ill patients: focus on thiamine, vitamin C, and vitamin D. Intensive Care Med 2018. [PMID: 29520660 PMCID: PMC6244527 DOI: 10.1007/s00134-018-5107-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Karin Amrein
- Division of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, Graz, Austria.
| | - Heleen M Oudemans-van Straaten
- Department of Adult Intensive Care, VU University Medical Centre, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
| | - Mette M Berger
- Service of Adult Intensive Care and Burns, Lausanne University Hospital-CHUV, Lausanne, Switzerland
| |
Collapse
|
581
|
de Grooth HJ, Manubulu-Choo WP, Zandvliet AS, Spoelstra-de Man AME, Girbes AR, Swart EL, Oudemans-van Straaten HM. Vitamin C Pharmacokinetics in Critically Ill Patients: A Randomized Trial of Four IV Regimens. Chest 2018. [PMID: 29522710 DOI: 10.1016/j.chest.2018.02.025] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Early high-dose IV vitamin C is being investigated as adjuvant therapy in patients who are critically ill, but the optimal dose and infusion method are unclear. The primary aim of this study was to describe the dose-plasma concentration relationship and safety of four different dosing regimens. METHODS This was a four-group randomized pharmacokinetic trial. Patients who were critically ill with multiple organ dysfunction were randomized to receive 2 or 10 g/d vitamin C as a twice daily bolus infusion or continuous infusion for 48 h. End points were plasma vitamin C concentrations during 96 h, 12-h urine excretion of vitamin C, and oxalate excretion and base excess. A population pharmacokinetic model was developed using NONMEM. RESULTS Twenty patients were included. A two-compartment pharmacokinetic model with creatinine clearance and weight as independent covariates described all four regimens best. With 2 g/d bolus, plasma vitamin C concentrations at 1 h were 29 to 50 mg/L and trough concentrations were 5.6 to 16 mg/L. With 2 g/d continuous, steady-state concentrations were 7 to 37 mg/L at 48 h. With 10 g/d bolus, 1-h concentrations were 186 to 244 mg/L and trough concentrations were 14 to 55 mg/L. With 10 g/d continuous, steady-state concentrations were 40 to 295 mg/L at 48 h. Oxalate excretion and base excess were increased in the 10 g/d dose. Forty-eight hours after discontinuation, plasma concentrations declined to hypovitaminosis levels in 15% of patients. CONCLUSIONS The 2 g/d dose was associated with normal plasma concentrations, and the 10 g/d dose was associated with supranormal plasma concentrations, increased oxalate excretion, and metabolic alkalosis. Sustained therapy is needed to prevent hypovitaminosis. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT02455180; URL: www.clinicaltrials.gov.
Collapse
Affiliation(s)
- Harm-Jan de Grooth
- Department of Intensive Care, VU University Medical Center, Amsterdam, The Netherlands; Department of Anesthesiology, VU University Medical Center, Amsterdam, The Netherlands.
| | - Wai-Ping Manubulu-Choo
- Department of Clinical Pharmacology and Pharmacy, VU University Medical Center, Amsterdam, The Netherlands; Department of Pharmacy, Westfriesgasthuis, Hoorn, The Netherlands
| | - Anthe S Zandvliet
- Department of Clinical Pharmacology and Pharmacy, VU University Medical Center, Amsterdam, The Netherlands
| | | | - Armand R Girbes
- Department of Intensive Care, VU University Medical Center, Amsterdam, The Netherlands
| | - Eleonora L Swart
- Department of Clinical Pharmacology and Pharmacy, VU University Medical Center, Amsterdam, The Netherlands
| | | |
Collapse
|
582
|
Marik PE, Long A. ARDS complicating pustular psoriasis: treatment with low-dose corticosteroids, vitamin C and thiamine. BMJ Case Rep 2018; 2018:bcr-2017-223475. [PMID: 29420246 DOI: 10.1136/bcr-2017-223475] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
We report the case of a 45-year-old Caucasian woman with a history of psoriasis, admitted to our Medical intensive care unit following the acute onset of diffuse rash and progressive dyspnoea and hypoxaemia requiring escalating respiratory support (continuous positive airway pressure of 10 cm H2O). Her chest X-ray was consistent with findings of non-cardiogenic pulmonary oedema. Echocardiogram was normal. Dermatology considered her skin lesions to be consistent with psoriasis vulgaris with pustular flare. In the absence of an identifiable cause for her respiratory failure, she was diagnosed with acute respiratory distress syndrome due to her psoriatic flare. Treatment with cyclosporine was initiated together with low-dose systemic corticosteroids, intravenous vitamin C and thiamine. The patient made a dramatic recovery being weaned to nasal cannulae within 24 hours after the initiation of this treatment protocol and was discharged home a few days later.
Collapse
Affiliation(s)
- Paul Ellis Marik
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, Norfolk, Virginia, USA
| | - Ashleigh Long
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, Norfolk, Virginia, USA
| |
Collapse
|
583
|
Abstract
PURPOSE OF REVIEW This narrative review summarizes recent insights into the role of vitamin C in sepsis. RECENT FINDINGS Septic shock remains a major source of morbidity and mortality in critically ill patients. Although many nutritional supplements have previously been tested unsuccessfully, vitamins are still being explored as a therapeutic option in septic patients. In particular, vitamin C-containing regimens as adjunctive therapy in sepsis have received much attention. SUMMARY In-vitro evidence supports a critical role for vitamin C in cellular mechanisms relevant to the pathophysiology of sepsis. However, whether this justifies therapeutic use of vitamin C in septic patients remains uncertain.
Collapse
Affiliation(s)
- Sven-Olaf Kuhn
- Klinik für Anästhesiologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Konrad Meissner
- Klinik für Anästhesiologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Lena M. Mayes
- Department of Anesthesiology, University of Colorado Denver, U.S.A
| | - Karsten Bartels
- Department of Anesthesiology, University of Colorado Denver, U.S.A
| |
Collapse
|
584
|
Marik PE, Hooper MH. Doctor-your septic patients have scurvy! CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2018; 22:23. [PMID: 29378661 PMCID: PMC5789732 DOI: 10.1186/s13054-018-1950-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 01/09/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Paul E Marik
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, 825 Fairfax Av, Suite 410, Norfolk, VA, 23507, USA.
| | - Michael H Hooper
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, 825 Fairfax Av, Suite 410, Norfolk, VA, 23507, USA
| |
Collapse
|
585
|
Vasodilatory Shock in the ICU: Perils, Pitfalls and Therapeutic Options. ANNUAL UPDATE IN INTENSIVE CARE AND EMERGENCY MEDICINE 2018 2018. [DOI: 10.1007/978-3-319-73670-9_9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
586
|
Carr AC, Rosengrave PC, Bayer S, Chambers S, Mehrtens J, Shaw GM. Hypovitaminosis C and vitamin C deficiency in critically ill patients despite recommended enteral and parenteral intakes. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2017; 21:300. [PMID: 29228951 PMCID: PMC5725835 DOI: 10.1186/s13054-017-1891-y] [Citation(s) in RCA: 243] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/13/2017] [Indexed: 02/07/2023]
Abstract
Background Vitamin C is an essential water-soluble nutrient which cannot be synthesised or stored by humans. It is a potent antioxidant with anti-inflammatory and immune-supportive roles. Previous research has indicated that vitamin C levels are depleted in critically ill patients. In this study we have assessed plasma vitamin C concentrations in critically ill patients relative to infection status (septic shock or non-septic) and level of inflammation (C-reactive protein concentrations). Vitamin C status was also assessed relative to daily enteral and parenteral intakes to determine if standard intensive care unit (ICU) nutritional support is adequate to meet the vitamin C needs of critically ill patients. Methods Forty-four critically ill patients (24 with septic shock, 17 non-septic, 3 uncategorised) were recruited from the Christchurch Hospital Intensive Care Unit. We measured concentrations of plasma vitamin C and a pro-inflammatory biomarker (C-reactive protein) daily over 4 days and calculated patients’ daily vitamin C intake from the enteral or total parenteral nutrition they received. We compared plasma vitamin C and C-reactive protein concentrations between septic shock and non-septic patients over 4 days using a mixed effects statistical model, and we compared the vitamin C status of the critically ill patients with known vitamin C bioavailability data using a four-parameter log-logistic response model. Results Overall, the critically ill patients exhibited hypovitaminosis C (i.e., < 23 μmol/L), with a mean plasma vitamin C concentration of 17.8 ± 8.7 μmol/L; of these, one-third had vitamin C deficiency (i.e., < 11 μmol/L). Patients with hypovitaminosis C had elevated inflammation (C-reactive protein levels; P < 0.05). The patients with septic shock had lower vitamin C concentrations and higher C-reactive protein concentrations than the non-septic patients (P < 0.05). Nearly 40% of the septic shock patients were deficient in vitamin C, compared with 25% of the non-septic patients. These low vitamin C levels were apparent despite receiving recommended intakes via enteral and/or parenteral nutritional therapy (mean 125 mg/d). Conclusions Critically ill patients have low vitamin C concentrations despite receiving standard ICU nutrition. Septic shock patients have significantly depleted vitamin C levels compared with non-septic patients, likely resulting from increased metabolism due to the enhanced inflammatory response observed in septic shock.
Collapse
Affiliation(s)
- Anitra C Carr
- Department of Pathology, University of Otago, Christchurch, PO Box 4345, Christchurch, 8140, New Zealand.
| | - Patrice C Rosengrave
- Department of Pathology, University of Otago, Christchurch, PO Box 4345, Christchurch, 8140, New Zealand
| | - Simone Bayer
- Department of Pathology, University of Otago, Christchurch, PO Box 4345, Christchurch, 8140, New Zealand
| | - Steve Chambers
- Department of Pathology, University of Otago, Christchurch, PO Box 4345, Christchurch, 8140, New Zealand
| | - Jan Mehrtens
- Department of Intensive Care Medicine, Christchurch Hospital, Private Bag 4710, Christchurch, 8140, New Zealand
| | - Geoff M Shaw
- Department of Intensive Care Medicine, Christchurch Hospital, Private Bag 4710, Christchurch, 8140, New Zealand
| |
Collapse
|
587
|
Effect of High-Dose Vitamin C Infusion in a Glucose-6-Phosphate Dehydrogenase-Deficient Patient. Case Rep Med 2017; 2017:5202606. [PMID: 29317868 PMCID: PMC5727655 DOI: 10.1155/2017/5202606] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/07/2017] [Accepted: 10/22/2017] [Indexed: 01/10/2023] Open
Abstract
Vitamin C supplementation is generally regarded as benign. There has been a resurgence of interest in the general medical community regarding the use of vitamin C most notably in the care of sepsis. Nonetheless, caution must be taken if supraphysiologic vitamin C supplementation is being administered as it should be considered a medication just like any other. We present a case of hemolysis in a glucose-6-phosphate dehydrogenase- (G6PD-) deficient patient receiving high-dose vitamin C infusions for his rheumatoid arthritis.
Collapse
|
588
|
Carr AC. Symposium on Vitamin C, 15th September 2017; Part of the Linus Pauling Institute's 9th International Conference on Diet and Optimum Health. Antioxidants (Basel) 2017; 6:antiox6040094. [PMID: 29160838 PMCID: PMC5745504 DOI: 10.3390/antiox6040094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 11/17/2017] [Accepted: 11/18/2017] [Indexed: 11/16/2022] Open
Affiliation(s)
- Anitra C Carr
- Department of Pathology, University of Otago, Christchurch, PO Box 4345, Christchurch 8140, New Zealand.
| |
Collapse
|
589
|
Greco E, Lupia E, Bosco O, Vizio B, Montrucchio G. Platelets and Multi-Organ Failure in Sepsis. Int J Mol Sci 2017; 18:ijms18102200. [PMID: 29053592 PMCID: PMC5666881 DOI: 10.3390/ijms18102200] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 10/13/2017] [Accepted: 10/17/2017] [Indexed: 12/11/2022] Open
Abstract
Platelets have received increasing attention for their role in the pathophysiology of infectious disease, inflammation, and immunity. In sepsis, a low platelet count is a well-known biomarker for disease severity and more recently authors have focused their attention on the active role of platelets in the pathogenesis of multi-organ failure. Septic shock is characterised by a dysregulated inflammatory response, which can impair the microcirculation and lead to organ injury. Being at the crossroads between the immune system, clotting cascade, and endothelial cells, platelets seem to be an appealing central mediator and possible therapeutic target in sepsis. This review focuses on the pathogenic role of platelets in septic organ dysfunction in humans and animal models.
Collapse
Affiliation(s)
- Elisabetta Greco
- Department of Medical Science, University of Turin, 10126 Turin, Italy.
| | - Enrico Lupia
- Department of Medical Science, University of Turin, 10126 Turin, Italy.
| | - Ornella Bosco
- Department of Medical Science, University of Turin, 10126 Turin, Italy.
| | - Barbara Vizio
- Department of Medical Science, University of Turin, 10126 Turin, Italy.
| | | |
Collapse
|
590
|
Abstract
Sepsis is characterized by early massive catabolism, lean body mass (LBM) loss, and escalating hypermetabolism persisting for months to years. Early enteral nutrition should attempt to correct micronutrient/vitamin deficiencies, deliver adequate protein and moderated nonprotein calories, as well-nourished patients can generate reasonable endogenous energy. After resuscitation, increasing protein/calories are needed to attenuate LBM loss and promote recovery. Malnutrition screening is essential, and parenteral nutrition can be safely added when enteral nutrition is failing based on preillness malnutrition. Following discharge from intensive care unit, significantly increased protein/calorie delivery is required for months to years to facilitate functional and LBM recovery.
Collapse
|
591
|
Subramanian VS, Sabui S, Moradi H, Marchant JS, Said HM. Inhibition of intestinal ascorbic acid uptake by lipopolysaccharide is mediated via transcriptional mechanisms. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1860:556-565. [PMID: 29030247 DOI: 10.1016/j.bbamem.2017.10.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/14/2017] [Accepted: 10/08/2017] [Indexed: 12/28/2022]
Abstract
Ascorbic acid (AA) accumulation in intestinal epithelial cells is an active transport process mainly mediated by two sodium-dependent vitamin C transporters (SVCT-1 and SVCT-2). To date, little is known about the effect of gut microbiota generated lipopolysaccharide (LPS) on intestinal absorption of water-soluble vitamins. Therefore, the objective of this study was to investigate the effects of bacterially-derived LPS on AA homeostasis in enterocytes using Caco-2 cells, mouse intestine and intestinal enteroids models. Pre-treating Caco-2 cells and mice with LPS led to a significant decrease in carrier-mediated AA uptake. This inhibition was associated with a significant reduction in SVCT-1 and SVCT-2 protein, mRNA, and hnRNA expression. Furthermore, pre-treating enteroids with LPS also led to a marked decrease in SVCT-1 and SVCT-2 protein and mRNA expression. Inhibition of SVCT-1 and SVCT-2 occurred at least in part at the transcriptional level as promoter activity of SLC23A1 and SLC23A2 was attenuated following LPS treatment. Subsequently, we examined the protein and mRNA expression levels of HNF1α and Sp1 transcription factors, which are needed for basal SLC23A1 and SLC23A2 promoter activity, and found that they were significantly decreased in the LPS treated Caco-2 cells and mouse jejunum; this was reflected on level of the observed reduction in the interaction of these transcription factors with their respective promoters in Caco-2 cells treated with LPS. Our findings indicate that LPS inhibits intestinal carrier- mediated AA uptake by down regulating the expression of both vitamin C transporters and transcriptional regulation of SLC23A1 and SLC23A2 genes.
Collapse
Affiliation(s)
- Veedamali S Subramanian
- Departments of Medicine, Physiology and Biophysics, University of California, Irvine, CA 92697, United States; Department of Veterans Affairs Medical Center, Long Beach, CA 90822, United States.
| | - Subrata Sabui
- Departments of Medicine, Physiology and Biophysics, University of California, Irvine, CA 92697, United States; Department of Veterans Affairs Medical Center, Long Beach, CA 90822, United States
| | - Hamid Moradi
- Departments of Medicine, Physiology and Biophysics, University of California, Irvine, CA 92697, United States; Department of Veterans Affairs Medical Center, Long Beach, CA 90822, United States
| | - Jonathan S Marchant
- Department of Pharmacology, University of Minnesota Medical School, MN 55455, United States
| | - Hamid M Said
- Departments of Medicine, Physiology and Biophysics, University of California, Irvine, CA 92697, United States; Department of Veterans Affairs Medical Center, Long Beach, CA 90822, United States
| |
Collapse
|
592
|
Vitamin C: The next step in sepsis management? J Crit Care 2017; 43:230-234. [PMID: 28934705 DOI: 10.1016/j.jcrc.2017.09.031] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/14/2017] [Accepted: 09/15/2017] [Indexed: 01/20/2023]
Abstract
Sepsis is a life-threatening medical condition, affecting approximately 26 million people worldwide every year. The disease is a continuum, marked by dysregulated inflammation and hemodynamic instability leading to shock, multi-system organ dysfunction, and death. Over the past decades, there has been a focus on the early identification and treatment of sepsis primarily with bundled and goal directed therapy. Despite these advances, morbidity and mortality has remained high, prompting investigation into novel therapies. Vitamin C is a water-soluble vitamin that plays a role in mediating inflammation through antioxidant activities and is also important in the synthesis of cortisol, catecholamines, and vasopressin, which are key mediators in the disease process. Emerging evidence provides cursory data in support of the administration of vitamin C in addition to standard therapy to ameliorate the effects of inflammation and improve hemodynamic stability in patients with sepsis and septic shock; however, further evidence is needed to support this practice. This review discusses the physiologic role of vitamin C as well as the recent literature and evidence for the use of vitamin C in patients presenting with sepsis.
Collapse
|
593
|
The Effect of Sepsis on the Erythrocyte. Int J Mol Sci 2017; 18:ijms18091932. [PMID: 28885563 PMCID: PMC5618581 DOI: 10.3390/ijms18091932] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 08/31/2017] [Accepted: 09/04/2017] [Indexed: 12/25/2022] Open
Abstract
Sepsis induces a wide range of effects on the red blood cell (RBC). Some of the effects including altered metabolism and decreased 2,3-bisphosphoglycerate are preventable with appropriate treatment, whereas others, including decreased erythrocyte deformability and redistribution of membrane phospholipids, appear to be permanent, and factors in RBC clearance. Here, we review the effects of sepsis on the erythrocyte, including changes in RBC volume, metabolism and hemoglobin's affinity for oxygen, morphology, RBC deformability (an early indicator of sepsis), antioxidant status, intracellular Ca2+ homeostasis, membrane proteins, membrane phospholipid redistribution, clearance and RBC O₂-dependent adenosine triphosphate efflux (an RBC hypoxia signaling mechanism involved in microvascular autoregulation). We also consider the causes of these effects by host mediated oxidant stress and bacterial virulence factors. Additionally, we consider the altered erythrocyte microenvironment due to sepsis induced microvascular dysregulation and speculate on the possible effects of RBC autoxidation. In future, a better understanding of the mechanisms involved in sepsis induced erythrocyte pathophysiology and clearance may guide improved sepsis treatments. Evidence that small molecule antioxidants protect the erythrocyte from loss of deformability, and more importantly improve septic patient outcome suggest further research in this area is warranted. While not generally considered a critical factor in sepsis, erythrocytes (and especially a smaller subpopulation) appear to be highly susceptible to sepsis induced injury, provide an early warning signal of sepsis and are a factor in the microvascular dysfunction that has been associated with organ dysfunction.
Collapse
|
594
|
Thiamine. Chest 2017; 152:686-687. [DOI: 10.1016/j.chest.2017.06.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Accepted: 06/13/2017] [Indexed: 11/18/2022] Open
|
595
|
Response. Chest 2017; 152:687-688. [DOI: 10.1016/j.chest.2017.06.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 06/28/2017] [Accepted: 06/28/2017] [Indexed: 11/22/2022] Open
|
596
|
Role of Oxidative Stress and Mitochondrial Dysfunction in Sepsis and Potential Therapies. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:5985209. [PMID: 28904739 PMCID: PMC5585571 DOI: 10.1155/2017/5985209] [Citation(s) in RCA: 179] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/07/2017] [Accepted: 07/26/2017] [Indexed: 02/07/2023]
Abstract
Sepsis is one of the most important causes of death in intensive care units. Despite the fact that sepsis pathogenesis remains obscure, there is increasing evidence that oxidants and antioxidants play a key role. The imbalance of the abovementioned substances in favor of oxidants is called oxidative stress, and it contributes to sepsis process. The most important consequences are vascular permeability impairment, decreased cardiac performance, and mitochondrial malfunction leading to impaired respiration. Nitric oxide is perhaps the most important and well-studied oxidant. Selenium, vitamin C, and 3N-acetylcysteine among others are potential therapies for the restoration of redox balance in sepsis. Results from recent studies are promising, but there is a need for more human studies in a clinical setting for safety and efficiency evaluation.
Collapse
|
597
|
Barabutis N, Khangoora V, Marik PE, Catravas JD. Hydrocortisone and Ascorbic Acid Synergistically Prevent and Repair Lipopolysaccharide-Induced Pulmonary Endothelial Barrier Dysfunction. Chest 2017; 152:954-962. [PMID: 28739448 DOI: 10.1016/j.chest.2017.07.014] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/20/2017] [Accepted: 07/12/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Sepsis refers to the dysregulated host immune response elicited by microbial infections resulting in life-threatening organ dysfunction. Sepsis represents a medical challenge, since it is associated with a rate of death as high as 60%. Septic shock is strongly associated with vascular dysfunction and elevated pulmonary capillary permeability. We recently reported that the combination of hydrocortisone (HC), ascorbic acid (vitC), and thiamine dramatically improves outcomes and reduces mortality in patients with sepsis. In the present study, we provide experimental evidence in support of the hypothesis that the combination of HC and vitC enhances endothelial barrier function. METHODS Human lung microvascular endothelial cells were exposed to lipopolysaccharide (LPS) in the absence or presence of HC and vitC. RESULTS LPS alone induced profound hyperpermeability, as reflected in decreased values of transendothelial electrical resistance. vitC alone did not exhibit barrier enhancement properties nor did it affect the LPS-induced hyperpermeability. Similarly, HC alone exhibited only a minor barrier-enhancing and protective effect. Conversely, the combination of HC and vitC, either as before or after treatment, dramatically reversed the LPS-induced barrier dysfunction. The barrier-protective effects of HC and vitC were associated with reversal of LPS-induced p53 and phosphorylated cofilin downregulation and LPS-induced RhoA activation and myosin light chain phosphorylation. CONCLUSIONS These data provide a novel mechanism of endothelial barrier protection and suggest one possible pathway that may contribute to the therapeutic effects of HC and vitC in patients with sepsis.
Collapse
Affiliation(s)
- Nektarios Barabutis
- Frank Reidy Research Center for Bioelectrics, College of Health Sciences, Old Dominion University, Norfolk, VA
| | - Vikramjit Khangoora
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, Norfolk, VA
| | - Paul E Marik
- Division of Pulmonary and Critical Care Medicine, Eastern Virginia Medical School, Norfolk, VA
| | - John D Catravas
- School of Medical Diagnostic and Translational Sciences, College of Health Sciences, Old Dominion University, Norfolk, VA; Departments of Medicine and Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA.
| |
Collapse
|
598
|
Protective Role for Antioxidants in Acute Kidney Disease. Nutrients 2017; 9:nu9070718. [PMID: 28686196 PMCID: PMC5537833 DOI: 10.3390/nu9070718] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 06/26/2017] [Accepted: 07/04/2017] [Indexed: 12/16/2022] Open
Abstract
Acute kidney injury causes significant morbidity and mortality in the community and clinic. Various pathologies, including renal and cardiovascular disease, traumatic injury/rhabdomyolysis, sepsis, and nephrotoxicity, that cause acute kidney injury (AKI), induce general or regional decreases in renal blood flow. The ensuing renal hypoxia and ischemia promotes the formation of reactive oxygen species (ROS) such as superoxide radical anions, peroxides, and hydroxyl radicals, that can oxidatively damage biomolecules and membranes, and affect organelle function and induce renal tubule cell injury, inflammation, and vascular dysfunction. Acute kidney injury is associated with increased oxidative damage, and various endogenous and synthetic antioxidants that mitigate source and derived oxidants are beneficial in cell-based and animal studies. However, the benefit of synthetic antioxidant supplementation in human acute kidney injury and renal disease remains to be realized. The endogenous low-molecular weight, non-proteinaceous antioxidant, ascorbate (vitamin C), is a promising therapeutic in human renal injury in critical illness and nephrotoxicity. Ascorbate may exert significant protection by reducing reactive oxygen species and renal oxidative damage via its antioxidant activity, and/or by its non-antioxidant functions in maintaining hydroxylase and monooxygenase enzymes, and endothelium and vascular function. Ascorbate supplementation may be particularly important in renal injury patients with low vitamin C status.
Collapse
|
599
|
The authors reply. Pediatr Crit Care Med 2017; 18:731-732. [PMID: 28691971 PMCID: PMC5650071 DOI: 10.1097/pcc.0000000000001214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
600
|
Tyml K. Vitamin C and Microvascular Dysfunction in Systemic Inflammation. Antioxidants (Basel) 2017; 6:antiox6030049. [PMID: 28661424 PMCID: PMC5618077 DOI: 10.3390/antiox6030049] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 02/07/2023] Open
Abstract
Sepsis, life-threatening organ dysfunction caused by a dysfunctional host response to infection, is associated with high mortality. A promising strategy to improve the outcome is to inject patients intravenously with ascorbate (vitamin C). In animal models of sepsis, this injection improves survival and, among others, the microvascular function. This review examines our recent work addressing ascorbate's ability to inhibit arteriolar dysfunction and capillary plugging in sepsis. Arteriolar dysfunction includes impaired vasoconstriction/dilation (previously reviewed) and impaired conduction of vasoconstriction/dilation along the arteriole. We showed that ascorbate injected into septic mice prevents impaired conducted vasoconstriction by inhibiting neuronal nitric oxide synthase-derived NO, leading to restored inter-endothelial electrical coupling through connexin 37-containing gap junctions. Hypoxia/reoxygenation (confounding factor in sepsis) also impairs electrical coupling by protein kinase A (PKA)-dependent connexin 40 dephosphorylation; ascorbate restores PKA activation required for this coupling. Both effects of ascorbate could explain its ability to protect against hypotension in sepsis. Capillary plugging in sepsis involves P-selectin mediated platelet-endothelial adhesion and microthrombi formation. Early injection of ascorbate prevents capillary plugging by inhibiting platelet-endothelial adhesion and endothelial surface P-selectin expression. Ascorbate also prevents thrombin-induced platelet aggregation and platelet surface P-selectin expression, thus preventing microthrombi formation. Delayed ascorbate injection reverses capillary plugging and platelet-endothelial adhesion; it also attenuates sepsis-induced drop in platelet count in systemic blood. Thrombin-induced release of plasminogen-activator-inhibitor-1 from platelets (anti-fibrinolytic event in sepsis) is inhibited by ascorbate pH-dependently. Thus, under acidotic conditions in sepsis, ascorbate promotes dissolving of microthrombi in capillaries. We propose that protected/restored arteriolar conduction and capillary bed perfusion by ascorbate contributes to reduced organ injury and improved survival in sepsis.
Collapse
Affiliation(s)
- Karel Tyml
- Centre for Critical Illness Research, Lawson Health Research Institute, London, ON N6A 5W9, Canada.
- Department of Medical Biophysics, University of Western Ontario, London, ON N6A 5C1, Canada.
| |
Collapse
|