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The Influence of Diabetes Mellitus on Glucuronidation and Sulphation of Paracetamol in Patients with Febrile Neutropenia

  • Anna Stachowiak
  • Edyta Szałek
  • Agnieszka Karbownik
  • Anna Łojko
  • Joanna PorażkaEmail author
  • Iwona Przewoźna
  • Tomasz Grabowski
  • Anna Wolc
  • Edmund Grześkowiak
Open Access
Short Communication
  • 304 Downloads

Abstract

Background and Objectives

Numerous studies have confirmed the influence of diabetes mellitus on the pharmacokinetics of drugs. Paracetamol (APAP) is an antipyretic that is commonly used in febrile neutropenia (FN) therapy. APAP is chiefly metabolised by glucuronidation and sulphation. This study assessed the influence of diabetes on the pharmacokinetics of paracetamol and its metabolites: glucuronide (APAP-glu) and sulfate (APAP-sulfate) in FN patients.

Methods

Patients with FN received single intravenous dose 1000 mg of APAP. The FN patients were allocated to one of two groups: diabetics (DG, n = 7) or non-diabetics (NDG, n = 11). The plasma concentrations of paracetamol and its metabolites were measured with the validated high-performance liquid chromatography (HPLC) with ultraviolet (UV) detection.

Results

Pharmacokinetic parameters (mean [SD]) of APAP in the DG and NDG groups were as follows: Cmax (maximum comcentration) = 21.50 [11.23] vs. 23.42 [9.79] mg/L, AUC0–t (area under the concentration–time curve) = 44.23 [17.93] vs. 41.43 [14.57] mg·h/L, t1/2kel (elimination half-life) = 2.28 [0.80] vs. 2.11 [0.80] h. In both groups the exposure to APAP was comparable. The study did not reveal differences between the two groups in the pharmacokinetics of APAP-glu and APAP-sulfate. The Cmax and AUC0–t ratio between the metabolites and APAP were similar.

Conclusions

No differences in the pharmacokinetics of APAP, APAP-glu and APAP-sulfate in patients with FN indicates that diabetes does not influence glucuronidation and sulfatation of paracetamol.

Key points

Diabetes mellitus does not influence glucuronidation of paracetamol.

Diabetes mellitus does not influence sulfatation of paracetamol.

1 Introduction

Patients with hematological malignancies usually undergo complex therapy, including antipyretic therapy. However, cytostatic therapy has the myelotoxic effect. The concentration of neutrophils decreases in most patients who undergo consecutive courses of chemotherapy. If they develop an infection, it usually results in febrile neutropenia (FN). Decreased concentration of neutrophils < 500/µL favours rapid development of infections of different aetiologies. When the body temperature reaches > 38.3 °C in one measurement or when it has been ≥ 38 °C for longer than one hour, the patient develops FN [1]. Moreover, diabetes mellitus may increase the risk of febrile neutropenia in cancer patients receiving chemotherapy [2]. Patients with hematological cancers usually undergo complex therapy, beginning with antipyretic therapy. Paracetamol (APAP) is a common antipyretic drug [3]. APAP is eliminated from the body in the form of inactive metabolites, mostly glucuronides (40–67%) and sulfates (20–46%). The analgesic is to a lesser extent (3–4%) metabolised by cytochrome P450 (CYP) 2E1—to hepatotoxic N-acetyl-p-benzoquinone imine (NAPQI) [4]. The metabolites are eliminated in urine. Only about 4–5% is eliminated in an unchanged form through the kidneys [4, 5]. Apart from that, diabetes is characterised by increased glycation of albumin. In consequence, the binding of the drug to the protein may be impaired and its volume of distribution may be altered [6, 7]. Little is known about the activity of enzymes participating in the second phase of metabolism of APAP in diabetic patients. Moreover significant differences were observed in pharmacokinetics of paracetamol between diabetic and non-diabetic rabbits [8]. Therefore, the aim of the study was to assess the influence of diabetes on the pharmacokinetics of paracetamol and its two metabolites: glucuronide and sulfate in FN patients with haematological malignancies.

2 Subject and Methods

2.1 Subjects

The research was approved by the Bioethics Committee, University of Medical Sciences, Poznan, Poland (437/16). The research was explained to the patients and those who signed written informed consent were enrolled in the study. It was conducted between July 2016 and February 2017 in diabetic and non-diabetic FN patients with hematological malignancies. Patients were included in the study if their age was > 18 years; they had haematological malignancy, neutropenic fever and no history of allergy to paracetamol. Patients with neutropenic fever and diagnosed diabetes mellitus were enrolled to diabetic group. Diagnosis of diabetes mellitus was made by the presence of classic symptoms of hyperglycemia and an abnormal blood test (fasting plasma glucose concentration ≥ 126 mg/dL). Diabetes were not controlled with medication in the diabetic patients. The exclusion criteria were as follows: previous exposure for paracetamol for about 16 h, liver insufficiency, pregnancy and lactation, or arterial hypertension, acute diarrhoea, gastrointestinal tract haemorrhage, ascites, pleural effusion and smokers. Eighteen patients (13 men, 5 women: 7 diabetics and 11 non-diabetics) were enrolled in the research.

2.2 Drug administration and blood sampling

A dose of 1000 mg of paracetamol (100 mL of solution; Paracetamol B.Braun 10 mg/mL, address of manufacture: 34212 Melsungen, Germany) was administered to the patients by intravenous infusion lasting 15 min. Blood samples (1 mL) were collected before the drug administration (0) and 0.083; 0.25; 0.5; 1; 2; 4; 6; 7; 8 h after termination of the infusion. The blood samples were transferred into heparinised tubes and centrifuged at 2880 g for 10 min at 4 °C. Next the plasma was transferred to propylene tubes and stored at − 80 °C until analysis (max. 1 month).

2.3 Bioanalytical assay

The reagents used in the research were purchased from the following suppliers: paracetamol, theophylline and perchloric acid (Sigma Aldrich, Poland), paracetamol glucuronide and paracetamol sulfate (LGC Standards, Poland), HPLC (high-performance liquid chromatography) grade acetonitrile, methanol and orthophosphoric acid (Merck, Poland), sodium sulfate anhydrous (POCH S.A., Poland). Water used in the mobile phase was deionised, distilled and filtered through a Millipore system (Direct-Q UV3, Millipore) before use. Paracetamol B.Braun® 0.01 g/mL (batch: 16156451, expiration date: September 2017) was purchased from B.Braun®, Melsungen, Germany.

The concentrations of paracetamol, paracetamol glucuronide and paracetamol sulfate were assayed using the HPLC method with UV detection [9]. Separation was achieved by isocratic elution of the mobile phase, sodium sulfate 0.05 M pH 2.2 (adjusted with 85% orthophosphoric acid)—acetonitrile (93:7, v/v), at a flow rate of 1.0 mL/min through a Hypersil ODS C18 column (150 mm, 4.6 mm, 5.0 µm particle size) (Thermo Electron Corporation®). The column temperature was maintained at 25 °C. The UV detection wavelength was set at 254 nm, and the injection volume was 50 µL. The total analysis time for each run was 10 min. The lower limit of quantification (LLOQ) for paracetamol, paracetamol glucuronide and paracetamol sulfate were 0.1, 0.5  and 0.1 mg/L, respectively. Intra- and inter-day accuracy and precision of the LLOQ, low quality control (0.25 , 1.0 , 0.25 mg/L), medium quality control (20.0, 30.0, 10 mg/L), and high quality control (40.0, 50.0, 15.0 mg/L) were well within the acceptable limit of 15% coefficient of variation (CV%) for paracetamol, paracetamol glucuronide and paracetamol sulfate. The calibration was linear within the range of 0.1–45 mg/L (r = 0.999) for paracetamol, 0.5–60 mg/L (r = 0.999) for paracetamol glucuronide and—0.1–20 mg/L (r = 0.998) for paracetamol sulfate.

2.4 Pharmacokinetic analysis

Pharmacokinetic parameters (Cmax, t1/2kel, Vd/kg—volume of distribution per kilogram, CL clearance, AUC0–t, AUMC0–t—area under first moment concentration time profile, MRT0–t mean residual time) were estimated by non-compartmental methods, using Phoenix™ WinNonlin® v. 6.3; Certara L.P., USA software (Certara L.P., USA) and ThothPro 4.1 (ThothPro Sp. z o.o., Poland).

2.5 Statistical analysis

No study power calculation was performed. The number of subjects to be included in the study was based on previous similar studies in severely ill patients. Descriptive analysis of study results was performed. The results are expressed as mean ± SD.

3 Results

In both groups, the mean BMIs (body mass index) of the subjects were similar. However, the diabetic patients were slightly older (52 [15] vs. 42 [14] years) and their fasting serum glucose concentration were significantly higher (137.4 vs. 96.1 mg/dL) (Table 1). The creatinine clearance estimated by the Cockroft-Gault formula was below the reference values (75–115 mL/min) in 6 patients, but it was > 30 mL/min, so it did not indicate renal failure and was not a contraindication against APAP. The concentrations of hepatic enzymes, i.e. aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were too high in 4 and 6 patients, respectively. 17 patients had hypoalbuminaemia, which is characteristic of patients treated for haematological malignancies.
Table 1

The characteristics of patients with febrile neutropenia

Parameter

Valuea

Diabetic group

Non-diabetic group

Males/females [n]

4/3

9/2

Age [years]

52 ± 15 (33–73)

42 ± 14 (19–57)

Weight [kg]

80 ± 24 (49–120)

84 ± 17 (60–107)

BMI [kg/m2]

27.1 ± 7.3 (18.2–36.2)

26.2 ± 5.4 (19.3–36.1)

Fasting glucose [mg/dL]

137.4 ± 45.9 (98.8–235.1)

96.1 ± 12.8 (83.3–119.0)

Ccr [mg/dL]

1.11 ± 0.45

0.99 ± 0.72

CLCR [mL/min]

109.4 ± 77.8 (24.7–262.7)

104.8 ± 66.3 (49.9–297.4)

Total bilirubin [µmol/L]

11.0 ± 6.4 (3.7–19.4)

11.6 ± 6.4 (4.9–21.7)

Albumin [g/L]

27.5 ± 5.6 (20.3–32.6)

26.8 ± 6.0 (19.6–39.6)

AST [U/L]

28 ± 15 (12–52)

18 ± 10 (8–41)

ALT [U/L]

85 ± 71 (15–234)

46 ± 37 (11–118)

BMI body mass index, Ccr creatinine concentration, CLCR creatinine clearance estimated by the Cockroft-Gault formula, AST aspartate aminotransferase, ALT alanine aminotransferase

aValues are expressed as the mean ± standard deviation

There was considerable intersubject variability in the pharmacokinetic parameters of APAP, APAP-glu and APAP-sulfate, as evidenced by the CV% [10] (Table 2).
Table 2

Pharmacokinetic parameters for paracetamol (APAP) and its metabolites—glucuronide (APAP-glu) and sulfate (APAP-sulfate) in patients with neutropenic fever

Pharmacokinetics parameters

Diabetic group

(n = 7)

Valuec

Non-diabetic group

(n = 11)

Valuec

APAP

 Cmax [mg/L]

21.50 ± 11.23 (52.2)

23.42 ± 9.79 (41.8)

 t1/2kel [h]

2.28 ± 0.80 (35.1)

2.11 ± 0.80 (38.0)

 Vd/kg [L/kg]

0.87 ± 0.36 (41.2)

0.80 ± 0.36 (45.7)

 CL [h]

24.56 ± 11.08 (45.1)

29.24 ± 21.28 (72.8)

 AUC0–t [mg·h/L]

44.23 ± 17.93 (40.5)

41.43 ± 14.57 (35.2)

 AUMC0–t [mg·h2/L]

104.23 ± 51.55 (49.5)

93.12 ± 37.60 (40.1)

 MRT0–t [h]

2.23 ± 0.38 (17.0)

2.15 ± 0.41 (19.2)

APAP-glu

 Cmax [mg/L]

24.03 ± 10.49 (43.7)

20.05 ± 14.48 (72.2)

 tmax [h]

2.00 ± 1.41 (70.7)

1.03 ± 0.71 (69.4)

 t1/2kel [h]

13.21 ± 25.87 (195.9)

4.54 ± 3.42 (69,4)

 AUC0–t [mg·h/L]

117.52 ± 41.43 (35.3)

110.06 ± 105.71 (96.1)

 AUMC0–t [mg·h2/L]

387.93 ± 144.51 (37.3)

384.78 ± 408.27 (101.6)

 MRT0–t [h]

3.20 ± 0.48 (14.9)

3.17 ± 0.49 (72.2)

APAP-sulfate

 Cmax [mg/L]

6.29 ± 5.63 (89.5)

6.99 ± 3.02 (43.2)

 tmax [h]

1.40 ± 0.55 (39.1)

1.33 ± 0.75 (56.5)

  t1/2kel [h]

2.68 ± 0.56 (21.0)

2.07 ± 0.48 (23.3)

 AUC0–t [mg·h/L]

34.23 ± 30.65 (89.5)

35.73 ± 21.04 (58.9)

 AUMC0–t [mg·h2/L]

119.19 ± 110.67 (92.9)

115.70 ± 72.57 (62.7)

 MRT0–t [h]

3.08 ± 0.71 (23.2)

3.03 ± 0.23 (8.1)

APAP-glu/APAPa

 AUC0–t

2.93 ± 1.34 (42.4)

1.87 ± 0.69 (105.4)

 Cmax

1.19 ± 0.33 (25.87)

0.76 ± 0.31 (110.8)

APAP-sulfate/APAPb

 AUC0–t

0.77 ± 0.55 (89.6)

0.98 ± 0.37 (62.1)

 Cmax

0.32 ± 0.27 (106.2)

0.35 ± 0.15 (70.0)

AUC0–t area under the plasma concentration–time curve from zero to the time of last measurable concentration, Cmax maximum observed plasma concentration, tmax time to first occurrence of Cmax, t1/2kel half-life in elimination phase, Cl clearance (Cl), Vd/kg volume of distribution per kilogram, AUMC0–t area under the first moment curve from zero to the time of last measurable concentration, MRT0–t mean residence time, M Arithmetic mean, SD standard deviation, CV coefficient of variation

aRatio of paracetamol glucuronide/paracetamol

bRatio of paracetamol sulfate/paracetamol

cValues are expressed as the mean ± standard deviation (%CV)

Figures 1 and 2 show mean plasma concentration–time profiles for APAP and its metabolites, respectively, in both groups during the 8 h period after the administration of APAP. Table 2 shows the pharmacokinetics of APAP, APAP-glu and APAP-sulfate. We observed no changes in the exposure to intravenous APAP, what was reflected by similar values of Cmax, AUC0–t in the groups (Table 2). There were also no differences in the following pharmacokinetic parameters of APAP: t1/2kel, Vd/kg, Cl, AUMC0–t, MRT0–t. Similarly, the groups under analysis did not differ in the Cmax, tmax, AUC0–t, t1/2kel, AUMC0–t, MRT0–t of APAP-glu and APAP-sulfate. The Cmax and AUC0–t ratio between the metabolites and APAP were similar.
Fig. 1

Paracetamol (APAP) plasma concentration vs. time profiles following single intravenous administration of paracetamol to patients with febrile neutropenia (diabetic vs. non-diabetic group). Plots represent the arithmetic mean with standard deviation

Fig. 2

Paracetamol glucuronide (APAP-glu) and paracetamol sulphate (APAP-sulfate) plasma concentrations vs. time profiles following single intravenous (i.v.) administration of paracetamol to patients with febrile neutropenia (diabetic vs. non-diabetic group). Plots represent the arithmetic mean with standard deviation

4 Discussion

Diabetes can cause pathophysiological changes in the body and affect the pharmacokinetics and pharmacodynamics of drugs. These changes include reduction in gastric emptying time, albumin glycation, changes in P-gp expression and CYP activity [11, 12, 13].

The influence of diabetes on the enzymatic activity at the second phase of the drug metabolism has not been fully investigated. In order to assess APAP glucuronidation and sulphation the pharmacokinetic parameters of APAP and its glucuronide and sulfate were compared in patients with FN between the groups of diabetic and non-diabetics. Pharmacokinetic parameters of APAP and its metabolites were comparable between diabetic and non-diabetic patients with FN. It might indicate that the diabetes does not influence the pharmacokinetics of paracetamol and its metabolites in patients with FN. Apart from that, the similar values of APAP-glu/APAP and APAP-sulfate/APAP ratios between the groups show that the disease seems not influence glucuronidation and sulphation of the analgesic (see Table 2).

Studies have shown that FN patients may exhibit hypoalbuminaemia, and in consequence increased volume of distribution and clearance of the drugs [8, 14]. Therefore, the pharmacokinetic parameters of APAP observed in the FN patients were compared with the data published in the literature [15, 16]. The pharmacokinetic parameters of APAP observed in the FN patients (AUC0–t, FN = 42.5 mg·h/L; Cmax, FN = 22.7 mg/L; t1/2, FN = 2.2 h; Vd, FN = 0.83 L/kg) were comparable with the values observed in healthy volunteers (AUC0–t = 42.5 mg·h/L; Cmax = 21.6 mg/L; t1/2 = 2.2 h; Vd = 1 L/kg) [12, 16]. Only the drug clearance was slightly greater (27.4 vs. 20.7 L/h).

The research was limited by the small number of participants. Therefore, it should be continued on larger groups of patients. It is acceptable to administer APAP to patients with liver failure if a dose of ≤ 3000 mg is not exceeded [11]. Another limitation is that we did not measure NAPQI, which is a hepatotoxic APAP metabolite.

5 Conclusion

Based on the results of this study, it seems that diabetes does not influence glucuronidation and sulfatation of paracetamol in patients with FN. Therefore, paracetamol may be given to these patients without any dose adjustment.

Notes

Acknowledgements

We would like to express gratitude to all nurses from Department of Hematology and Bone Marrow Transplantation, Poznan University of Medical Sciences for samples collection.

Compliance with Ethical Standards

Funding

No source of funding.

Conflicts of interest

Anna Stachowiak, Edyta Szałek, Agnieszka Karbownik Joanna Porażka, Iwona Przewoźna, Tomasz Grabowski, Anna Wolc, Edmund Grześkowiak have no conflict of interest.

Ethics approval

The research was approved by the Bioethics Committee, University of Medical Sciences, Poznan, Poland (437/16). All procedures in this study were in accordance with the 1964 Helsinki declaration (and its amendments).

Informed consent

Written informed consent was obtained from all patients participating in the study.

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Open AccessThis article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Department of Clinical Pharmacy and BiopharmacyMedical University of PoznańPoznańPoland
  2. 2.Department of Hematology and Bone Marrow TransplantationPoznan University of Medical SciencesPoznańPoland
  3. 3.Polpharma BiologicsGdańskPoland
  4. 4.Department of Animal ScienceIowa State UniversityAmesUSA
  5. 5.Hy-Line InternationalDallas CenterUSA

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