|Year : 2017 | Volume
| Issue : 1 | Page : 1-5
Hypertriglyceridemia–induced acute pancreatitis: A systematic review of the literature
Ionut Negoi1, Sorin Paun1, Massimo Sartelli2, Fausto Catena3, Luca Ansaloni4, Ruxandra Irina Negoi5, Mircea Beuran1
1 General Surgery Department, Emergency Hospital of Bucharest, Carol Davila University of Medicine and Pharmacy Bucharest, Bucharest, Romania
2 Department of Surgery, Macerata Hospital, Via Santa Lucia 2, 62019, Macerata, Italy
3 Department of Surgery, Maggiore Hospital, Parma, Italy
4 General Surgery Department, Papa Giovanni XXIII Hospital, Bergamo, Italy
5 Anatomy Department, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
|Date of Web Publication||15-Sep-2017|
Senior Lecturer of Surgery, General Surgery Department, Emergency Hospital of Bucharest, Carol Davila University of Medicine and Pharmacy Bucharest, Bucharest
Source of Support: None, Conflict of Interest: None
Objective: To summarize the current evidence about the hypertriglyceridemia–induced acute pancreatitis (HAP).
Methods: Systematic review of the English language literature was conducted using PubMed/ Medline database from its inception until August 2016. As a searching methodology, we have used a combination of ‘acute pancreatitis’ and ‘hypertriglyceridemia’ as keywords into the title.
Results: The diagnosis of HAP should be based on two out of the three criteria recommended by the international guidelines: characteristic clinical picture, serum pancreatic enzymes, and appropriate imagistics. The diagnosis of HAP should be distinguished between mild hypertriglyceridemia (> 150 mg/dL), which accompanies around one-third of all-causes acute pancreatitis, and severe hypertriglyceridemia (> 1 000 mg/dL) which generates acute pancreatitis. There is mixed evidence regarding a worse prognosis for patients with HAP, and a clear conclusion cannot be drawn. Similar to all the other etiologies, in HAP the initial treatment efforts should be nonspecific and addressed to acute pancreatitis, while pharmacologic and mechanical techniques should be added to lower the serum triglycerides as soon as possible.
Conclusions: We may conclude that HAP should be managed to respect all the general principles, also adding all the available resources to lower the serum triglycerides value, as early as possible in the acute setting and on long-term to prevent recurrences.
Keywords: Hypertriglyceridemia-induced, Acute pancreatitis, Systematic review, Etiology
|How to cite this article:|
Negoi I, Paun S, Sartelli M, Catena F, Ansaloni L, Negoi RI, Beuran M. Hypertriglyceridemia–induced acute pancreatitis: A systematic review of the literature. J Acute Dis 2017;6:1-5
|How to cite this URL:|
Negoi I, Paun S, Sartelli M, Catena F, Ansaloni L, Negoi RI, Beuran M. Hypertriglyceridemia–induced acute pancreatitis: A systematic review of the literature. J Acute Dis [serial online] 2017 [cited 2021 Jan 20];6:1-5. Available from: http://www.jadweb.org/text.asp?2017/6/1/1/214606
| 1. Introduction|| |
Hypertriglyceridemia is the third most frequent cause of acute pancreatitis after alcohol consumption and gallstone disease, with a reported frequency of 1%–10% of cases of acute pancreatitis,,. The risk of acute pancreatitis is about 5% at triglyceride levels of over 1 000 mg/dL, and 10%–20% for values of more than 2 000 mg/dL. On the other hand, increased cholesterol levels are not associated with acute pancreatitis. Dyslipidemia is defined as values of total cholesterol, low density lipoprotein-cholesterol, triglycerides, apolipoprotein-B, and lipoprotein (a) greater than acute biliary as values of high density lipoprotein-cholesterol or apolipoprotein A lower the 10th percentile of the general population,. The pathophysiological mechanisms include hydrolysis of the triglycerides by pancreatic lipase, with excessive formation of free fatty acids, secondary inflammatory changes and capillary injuries. Blood hyperviscosity with tissue ischemia plays an additional role.
The objective of the present study is to summarize the current evidence about the hypertriglyceridemic acute pancreatitis.
| 2. Materials and Methods|| |
This systematic review of the English language literature was conducted using PubMed/Medline database from its inception until August 2016. As searching methodology, we have used a combination of ‘acute pancreatitis’ and ‘hypertriglyceridemia’ as keywords into the title. We conducted the latest literature search in 23rd August 2016.
| 3. Results|| |
The electronic search revealed 84 articles, out of which 31 full-text papers were included in the current review [Figure 1].
According to the current guidelines, the diagnosis of acute pancreatitis should be based on two out of the three criteria: (a) characteristic abdominal pain, with acute onset, severe, persistent, radiating to the back; (b) serum lipase or amylase > three times the upper normal value; (c) characteristic findings on computed tomography or magnetic resonance imaging or ultrasonography,. Although the current evidence presents hyperlipemia as etiology for acute pancreatitis, there is no cut-off value shown to indicate hypertriglyceridemia as a cause in a particular patient. According to this, the clinician should conduct the appropriate workup to exclude other possible etiologies, while certifying an increased value for serum lipids [Figure 2] and [Figure 3], unpublished results of).
|Figure 2: The etiology of acute pancreatitis in 624 patients managed in Emergency Hospital of Bucharest during four years. It can be observed that hypertrig lyceridemia accounts for 5% of cases.|
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|Figure 3: The etiology of acute pancreatitis in 624 patients managed in Emergency Hospital of Bucharest during four years. It can be observed that hypertriglyceridemia was found more frequent in female patients.|
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3.2. Prognosis worse than other etiologies: heterogeneous evidence
Although the clinical picture of hypertriglyceridemic acute pancreatitis is similar to the other etiopathology forms, it seems that its severity may be accentuated. Tai et al. analyzed 126 cases of hypertriglyceridemia–induced acute pancreatitis (HAP) and 168 patients with acute biliary pancreatitis. They concluded that the rate of severe and recurrent acute pancreatitis was higher in patients with hypertriglyceridemia (31.0% vs. 26.2%), as were the comorbidities associated with diabetes mellitus (20.6% vs. 1.6%). Although the proportion of gastrointestinal bleeding, sepsis, and multiple organ failure was lower in patients with HAP, no differences regarding mortality were observed. However, a systematic review conducted by Carr et al., having a primary objective to determine if hypertriglyceridemia induces a more severe acute pancreatitis found heterogeneous and inconsistent results.
3.3. Treatment of the acute episode–general principles for acute pancreatitis, adding combined efforts to decrease the serum triglycerides
Similar to all the other etiologies, in HAP the initial treatment efforts should be nonspecific and addressed to acute pancreatitis, while pharmacologic and mechanical techniques should be added to lower as soon as possible the serum triglycerides (see [Figure 4]). A low-fat diet is required to decrease the triglyceride value, the enteral nutrition being the preferred way when feasible. Although an omega-3 rich diet may influence the inflammatory response in critically ill patients, their impact on triglycerides during acute illness is unknown. Plasmapheresis may be considered in patients with HAP, although a significant clinical benefit was not clearly proven. In most patients, plasmapheresis produces a 66.3% decrease in triglycerides after one session, and 83.3% after two sessions. Chen et al. assessed the results plasmapheresis after the introduction of this procedure in their hospital, comparing 60 patients with HAP with a control group of 34 patients. The authors observed no difference in overall mortality and morbidity with plasmapheresis, concluding that timing of this procedure, ideally as soon as possible, may provide superior results. A retrospective study of HAP during pregnancy compares five patients who benefit from plasmapheresis with five cases which not. Plasmapheresis decreased the inflammatory response from 100% to 28.6%, and the hospitalization time from (37.0 ± 20.8) days to (17.3 ± 6.7) days. According to the guideline of therapeutic apheresis in clinical practice proposed by the American Society for Apheresis, plasma exchange in hypertriglyceridemic acute pancreatitis has a weak recommendation, based on the evidence coming from no randomized controlled trials, one controlled trial, 12 case series, and 33 case reports. In these patients, the therapeutic plasma exchange may be done using both, centrifugal and double membrane filtration techniques. It seems that centrifugal methods have a higher efficacy, due to occlusion of the filters by triglycerides in the double membrane method.
|Figure 4: Intraoperative aspect of a laparoscopic anterior transgastric pseudocystogastroanatomosis, for a giant pancreatic pseudocyst, four months after a severe HCP.|
A: Anterior gastric wall incision; B: Transgastric puncture of the pseudocyst; C: Posterior gastric wall incision with pseudocyst's content evacuation; D: Pseudocyst's content aspiration; F: Anterior gastric wall running suture.
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3.4. Prevention of recurrences–the serum triglyceride value should be lower than 1 000 mg/dL
According to the National Cholesterol Education Program, the hypertriglyceridemia degrees of severity can be defined as: a) moderately elevated 150–199 mg/dL; b) increased: 200–499 mg/dL; and very high: ≥ 500 mg/dL. The current evidence suggests that pharmacological treatment of hypertriglyceridemia with fibrates, fish oil, and nicotinic acid should be started for triglyceride levels above 1 000 mg/dL to prevent acute pancreatitis. Along with the decrease in fat and carbohydrates food intake, the fibrates are recommended as first-line therapeutic agents in acute pancreatitis prevention. The medical control of triglycerides values, with a reduction of those below 500 mg/dL can prevent the recurrence of acute pancreatitis,
| 4. Discussion|| |
In patients with acute pancreatitis it is imperative to distinguish between mild hypertriglyceridemia (> 150 mg/dL), which accompanies 34%–47% of all causes acute pancreatitis, and severe hypertriglyceridemia (> 1 000 mg/dL) which generates acute pancreatitis. Although there is no cut-off value to indicate hypetrigliceridemia as etiology for acute pancreatitis, the mean serum triglycerides value was (2654 ± 2451) mg/dL in the systematic review of Carr et al.. Murphy et al. studied the incidence of acute pancreatitis due to hypertriglyceridemia in the population living between 1993–2007 in Tayside, Scotland, with a follow-up of 15 years. According to the highest triglyceride value, the study population was divided in three groups: (1) < 149 mg/dL; (2) 150–499 mg/dL; and (3) > 500 mg/dL. After covariate adjustment and removal of patients with gallstones, alcohol-related comorbidities, chronic pancreatitis, renal failure, the risk of incident HAP increased by 4% for every 100 mg/dL increase in triglyceride concentration.
Although a life-threating complication, fortunately, the hypertriglyceridemia is a rare cause of acute pancreatitis in pregnant women, usually occurring during the last two trimester of pregnancy,. Huang et al. reviewed 21 pregnant women diagnosed with acute pancreatitis, 95% being in the third trimester of gestation. Compared to acute biliary pancreatitis, the hypertriglyceridemic one was more frequent (14% vs. 48%) and more severe (0% vs. 40%). The mean serum values for triglycerides was (1 664.6 ± 984.9) mg/dL in moderately severe acute pancreatitis and (2701.7 ± 2141.5) mg/dL in the severe form of the disease (P > 0.05).
Tamoxifen, a selective estrogen receptor modulator, can have paradoxical effects on the lipid metabolism, with significant increases in the triglyceride and chylomicron levels,,. When patient's risk for HAP are increased, letrozole may be used, knowing that it has no effects on the serum lipids level. Everolimus, a mechanistic target of rapamycin inhibitor usually used to treat metastatic pancreatic neuroendocrine tumors and renal cell carcinoma, and for post-transplant immunosuppression was described to induce severe hypertriglyceridemia and acute pancreatitis. In human immunodeficiency virus-positive patients, who develop hypertriglyceridemia secondary to retroviral therapy, the risk of acute pancreatitis is low. In this study the incidence of acute pancreatitis was 1.2–4.9/1 000 person-years when triglycerides were < 1500 mg/dL, and 0/1 000 person-years when triglycerides were > 1500 mg/dL.
Although inconclusive with increasing evidence, there are studies which suggest that prognosis of HAP is more severe than for other causes of acute pancreatitis. Rashid et al. analyzed 5 500 patients with severe hypertriglyceridemia that accessed health care resources during 6.5 years and found a frequency for acute pancreatitis of 5.4%. Mean healthcare costs during the first year after hypertriglyceridemia diagnosis were $25 343 ± 33 139 for patients with acute pancreatitis, compared with $15 195 ± 24 040 for patients without acute pancreatitis. On the other hand, in patients with all causes acute pancreatitis, hypertriglyceridemia is associated with a higher rate of hypocalcemia (86.7% vs. 63.5%, P < 0.01), 24 h Acute Physiology and Chronic Health Evaluation II score (13.6 ± 5.7 vs. 10.7 ± 4.6, P < 0.01), shock (37.9% vs. 14.5%, P < 0.01), infection (37.4% vs. 18.3%, P < 0.01), and mortality (13.1% vs. 9.1%, P < 0.01). Hypertriglyceridemia is also an independent risk factor for acute kidney injury. The hypothesis behind this is that the action of pancreatic enzymes on triglycerides accumulated in the kidneys may explain acute renal injury in the early phase of the disease. Another negative impact of excess fatty acids in pancreatic acinar cells seems to be on aggravation the expression of genes involved endoplasmic reticulum stress–induced unfolded protein response. An et al. found as potential biomarkers for disease severity the upregulation of miR24-3p, 361-5p, 1246 and 222-3p, and the downregulation of miR181a-5p (P < 0.05). These microRNAs showed a good area under the curve for evaluation of the disease severity.
Addressing treatment of HAP, a study published in Pancreas journal this year concluded that double filtration plasma apheresis decreases the in-hospital stay for patients with severe hypertriglyceridemia associated acute pancreatitis from 10 to 5 days (P = 0.009). In the subgroup of patients with triglycerides > 5 000 mg/dL, the plasmapheresis decreased the hospitalization from 11 to 5 days (P = 0.012). Click et al. reviewed 74 articles with 301 patients addressing the role of apheresis in hypertriglyceridemic acute pancreatitis. Seventy percent of patients received the procedures within the first 48 h, and almost 85% required one–two sessions. The apheresis resulted in a mean triglycerides reduction of 85.4% (P < 0.001). Similar to the other findings, the authors concluded that further research, about the efficacy of apheresis in reducing the severity of acute pancreatitis, is needed. Other strategies to decrease the hypertriglyceridemia levels are continuous insulin and heparin therapy, drugs that stimulate lipoprotein lipase activity and secondary chylomicron breakdown,,,. Patel recommends an insulin infusion of 0.1 IU/kg/h co-administered with dextrose, to keep the blood glucose between 150–200 mg/dL. Coskun et al. added to usual treatment insulin therapy in 12 patients with HAP. Six patients had severe acute pancreatitis and eight presented diabetes mellitus. In all cases, following insulin therapy, the triglycerides decrease to less than 500 mg/dL in a mean time of three days. This effect of insulin explains why patients with uncontrolled type one and two diabetes mellitus may develop HAP due to excessive lipolysis from the absence of insulin effect during diabetic ketoacidosis.
In an effort to prevent recurrence of the HAP in patients with severe hypertriglyceridemia, Chang et al. used prophylactic plasmapheresis. Comparing six patients with severe hypertriglyceridemia and prophylactic plasmapheresis with six patients without this procedure the authors found that acute pancreatitis recurred in 0 vs. 3 cases (P = 0.046). A very extreme attitude in a 42-years old female with eight episodes of HAP was described by Swedziak et al.. They performed the exclusion of the distal common bile duct through a Roux-en-Y biliary bypass, using a 70-cm jejunum limb. During the six-month follow-up, there was no recurrence of acute pancreatitis, and the triglycerides serum value decreases from 993 mg/dL to 245 mg/dL.
We may conclude that HAP should be managed to respect all the general principles, also adding all the available resources to lower the serum triglycerides value, as early as possible in the acute setting and on long-term to prevent recurrences.
Conflict of interest statement
The authors report no conflict of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4]