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Rasmussen HC, Hanberg P, Lilleøre JG, Petersen EK, Hvistendahl MA, Jørgensen AR, Stilling M, Bue M. Penicillin concentrations in bone and subcutaneous tissue: A porcine microdialysis study comparing oral and intravenous treatment. J Orthop Res 2024. [PMID: 39101353 DOI: 10.1002/jor.25947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/12/2024] [Accepted: 07/01/2024] [Indexed: 08/06/2024]
Abstract
Penicillin is available in both an oral (penicillin V) and intravenous formulation (penicillin G), theoretically allowing for a safe transition between the two. However, the use of oral penicillin remains a topic of debate due to low and variable bioavailability. This study aimed to assess the time for which the free penicillin concentration exceeded targeted minimum inhibitory concentrations for Staphylococcus aureus and Streptococcus species (0.125, 0.25, and 0.5 mg/L) in cancellous bone and subcutaneous tissue after intravenous penicillin and oral penicillin administration. 12 female pigs (68-75 kg) were assigned, according to local standard clinical regimes, to either intravenous penicillin (1.2 g) or oral penicillin (0.8 g) treatment every 6 h over an 18 h period. Microdialysis catheters were placed for sampling in tibial cancellous bone and adjacent subcutaneous tissue. Data was dynamic/continually collected in the first dosing interval (0-6 h), simulating a prophylactic situation, and the third dosing interval (12-18 h), simulating a therapeutic setting. Plasma samples were collected for reference. For all investigated targets, intravenous treatment resulted in a longer mean time above relevant minimum inhibitory concentrations in cancellous bone during the first dosing interval, and in both cancellous bone and subcutaneous tissue during the third dosing interval compared to oral treatment. With clinically relevant dosing, intravenous penicillin provides superior exposure compared to oral penicillin in both a prophylactic and therapeutic setting.
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Affiliation(s)
- Hans Christian Rasmussen
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Pelle Hanberg
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Johanne G Lilleøre
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Elisabeth K Petersen
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Magnus A Hvistendahl
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Andrea R Jørgensen
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Mats Bue
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus, Denmark
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2
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Hanberg P, Rasmussen HC, Bue M, Stilling M, Jørgensen AR, Petersen EK, Lilleøre JG, Hvistendahl MA, Bille J, Klug TE. Penicillin concentrations in oropharyngeal and frontal sinus tissue following enteral and intravenous administration measured by microdialysis in a porcine model. Eur J Pharm Sci 2024; 201:106859. [PMID: 39038689 DOI: 10.1016/j.ejps.2024.106859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/08/2024] [Accepted: 07/19/2024] [Indexed: 07/24/2024]
Abstract
BACKGROUND Penicillin may be administered enterally or intravenously for the treatment of bacterial infections within the oropharynx and the frontal sinuses. We aimed to assess and compare penicillin concentrations in oropharyngeal and frontal sinus tissues following enteral and intravenous administration in a porcine model. METHOD Twelve pigs were randomized to receive either enteral (0.8 g Penicillin V) or intravenous (1.2 g Penicillin G) penicillin. Microdialysis was used for sampling in oropharyngeal and frontal sinus tissues during a six-hour dosing interval. In addition, plasma samples were collected. The primary endpoints were time with drug concentration above the minimal inhibitory concentration (T>MIC) for two MIC targets: 0.125 (low target) and 0.5 (high target) μg/mL (covering Group A Streptococci, Fusobactarium necrophorum, Streptococcus pneumoniae and Hemophilus influenza) and attainment of these treatment targets for ≥50 % T>MIC. RESULTS For both the low and high MIC targets, intravenous administration resulted in higher T>MIC in oropharyngeal and frontal sinus tissues compared to enteral administration. In oropharyngeal tissue, the treatment target (≥50 % T>MIC) was achieved for both the low target (96 %) and high target (68 %) when penicillin was administrated intravenously. In frontal sinus tissue, the treatment target was reached for the low target (70 %), but not the high target (35 %) when administered intravenously. None of the two tissues reached the treatment targets when penicillin was administered enterally. CONCLUSION Intravenous administrated penicillin in standard dosage is superior to enteral administration of penicillin in standard dosage in achieving clinically important T>MIC as the majority of targets were achieved following intravenously administration, while none of the targets were achieved following enteral administration. These results support the general notion of higher tissue concentrations following intravenous compared to enteral administration.
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Affiliation(s)
- Pelle Hanberg
- Department of Otorhinolaryngology, Head and Neck Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark; Department of Clinical Medicine, Aarhus Universitetshospital, FORUM, Palle Juul-Jensens Boulevard 11, 8200, Aarhus N, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus N, Denmark; Department of Otorhinolaryngology, Head and Neck Surgery, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark.
| | | | - Mats Bue
- Department of Clinical Medicine, Aarhus Universitetshospital, FORUM, Palle Juul-Jensens Boulevard 11, 8200, Aarhus N, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus N, Denmark; Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus Universitetshospital, FORUM, Palle Juul-Jensens Boulevard 11, 8200, Aarhus N, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus N, Denmark; Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Andrea René Jørgensen
- Department of Clinical Medicine, Aarhus Universitetshospital, FORUM, Palle Juul-Jensens Boulevard 11, 8200, Aarhus N, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus N, Denmark
| | - Elisabeth Krogsgaard Petersen
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus N, Denmark
| | - Johanne Gade Lilleøre
- Department of Clinical Medicine, Aarhus Universitetshospital, FORUM, Palle Juul-Jensens Boulevard 11, 8200, Aarhus N, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus N, Denmark
| | - Magnus A Hvistendahl
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, Aarhus N, Denmark
| | - Jesper Bille
- Department of Otorhinolaryngology, Head and Neck Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark
| | - Tejs Ehlers Klug
- Department of Otorhinolaryngology, Head and Neck Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark; Department of Clinical Medicine, Aarhus Universitetshospital, FORUM, Palle Juul-Jensens Boulevard 11, 8200, Aarhus N, Denmark
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3
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De Sutter PJ, Hermans E, De Cock P, Van Bocxlaer J, Gasthuys E, Vermeulen A. Penetration of Antibiotics into Subcutaneous and Intramuscular Interstitial Fluid: A Meta-Analysis of Microdialysis Studies in Adults. Clin Pharmacokinet 2024; 63:965-980. [PMID: 38955946 DOI: 10.1007/s40262-024-01394-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2024] [Indexed: 07/04/2024]
Abstract
BACKGROUND AND OBJECTIVE The interstitial fluid of tissues is the effect site for antibiotics targeting extracellular pathogens. Microdialysis studies investigating these concentrations in muscle and subcutaneous tissue have reported notable variability in tissue penetration. This study aimed to comprehensively summarise the existing data on interstitial fluid penetration in these tissues and to identify potential factors influencing antibiotic distribution. METHODS A literature review was conducted, focusing on subcutaneous and intramuscular microdialysis studies of antibiotics in both adult healthy volunteers and patients. Random-effect meta-analyses were used to aggregate effect size estimates of tissue penetration. The primary parameter of interest was the unbound penetration ratio, which represents the ratio of the area under the concentration-time curve in interstitial fluid relative to the area under the concentration-time curve in plasma, using unbound concentrations. RESULTS In total, 52 reports were incorporated into this analysis. The unbound antibiotic exposure in the interstitial fluid of healthy volunteers was, on average, 22% lower than in plasma. The unbound penetration ratio values were higher after multiple dosing but did not significantly differ between muscle and subcutaneous tissue. Unbound penetration ratio values were lower for acids and bases compared with neutral antibiotics. Neither the molecular weight nor the logP of the antibiotics accounted for the variations in the unbound penetration ratio. Obesity was associated with lower interstitial fluid penetration. Conditions such as sepsis, tissue inflammation and tissue ischaemia were not significantly associated with altered interstitial fluid penetration. CONCLUSIONS This study highlights the variability and generally lower exposure of unbound antibiotics in the subcutaneous and intramuscular interstitial fluid compared with exposure in plasma. Future research should focus on understanding the therapeutic relevance of these differences and identify key covariates that may influence them.
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Affiliation(s)
- Pieter-Jan De Sutter
- Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium.
| | - Eline Hermans
- Department of Basic and Applied Medical Sciences, Ghent University, Ghent, Belgium
- Department of Pediatrics, Ghent University Hospital, Ghent, Belgium
| | - Pieter De Cock
- Department of Basic and Applied Medical Sciences, Ghent University, Ghent, Belgium
- Department of Pharmacy, Ghent University Hospital, Ghent, Belgium
| | - Jan Van Bocxlaer
- Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
| | - Elke Gasthuys
- Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
| | - An Vermeulen
- Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
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Jørgensen AR, Bue M, Hanberg P, Petersen EK, Harlev C, Hansen J, Baad-Hansen T, Safwat A, Stilling M. Doxorubicin concentrations in bone tumour-relevant tissues after bolus and continuous infusion: a randomized porcine microdialysis study. Cancer Chemother Pharmacol 2024; 93:555-564. [PMID: 38332155 PMCID: PMC11130026 DOI: 10.1007/s00280-023-04637-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Accepted: 12/24/2023] [Indexed: 02/10/2024]
Abstract
PURPOSE Doxorubicin is a widely used chemotherapeutic drug that can be administered intravenously as both a bolus infusion and a continuous infusion. The latter is believed to lower the risk of cardiotoxicity, which is a critical long-term complication of doxorubicin treatment. The local tissue concentrations of doxorubicin will be reflected in both treatment efficacy and toxicity, but very limited information is available. The aim of this study was to measure the concentration of doxorubicin after continuous and bolus infusion in tissue compartments around a typical location of a bone tumour. METHODS Sixteen pigs (female, Danish Landrace, mean weight 77 kg) were randomized into two groups of eight. Both groups received an intravenous infusion of 150 mg doxorubicin; Group 1 received a bolus infusion (10-15 min) and Group 2 received a continuous infusion (6 h). Before infusion, microdialysis catheters were placed intravenously and in four bone tumour-relevant tissue compartments (cancellous bone, subcutaneous tissue, synovial fluid of the knee joint and muscle tissue). Sampling was done (n = 15) over 24 h, and venous blood samples were collected as a reference. RESULTS Area under the concentration-time curve (AUC0-24 h) for plasma (total concentration) was significantly different between the two groups, while peak drug concentration (Cmax) was significantly higher in two compartments (plasma and synovial fluid of the knee joint) in Group 1 compared to Group 2. Overall, the unbound tissue concentrations were extremely low with values below 0.20 µg/mL. CONCLUSION The pharmacokinetic profile for doxorubicin in the investigated tissues is very similar when comparing bolus and 6 h continuous infusion.
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Affiliation(s)
- Andrea René Jørgensen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, J112, 8200, Aarhus N, Denmark.
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark.
| | - Mats Bue
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, J112, 8200, Aarhus N, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Pelle Hanberg
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, J112, 8200, Aarhus N, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
| | - Elisabeth Krogsgaard Petersen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, J112, 8200, Aarhus N, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
| | - Christina Harlev
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, J112, 8200, Aarhus N, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
| | - Jakob Hansen
- Department of Forensic Medicine, Aarhus University, Aarhus N, Denmark
| | - Thomas Baad-Hansen
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Akmal Safwat
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
- Department of Oncology, Aarhus University Hospital, Aarhus N, Denmark
| | - Maiken Stilling
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, J112, 8200, Aarhus N, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
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Wang Y, Yang C, Liu W, Zhang Y, Wang Q, Cheng H, Shi J, Yang X, Yang S, Yao X, Wang Y, Song X. Enhanced efficacy of brucine dissolving-microneedles as a targeted delivery system in rheumatoid arthritis treatment: a comprehensive pharmacokinetic-pharmacodynamic analysis. Drug Deliv Transl Res 2024:10.1007/s13346-024-01606-w. [PMID: 38705909 DOI: 10.1007/s13346-024-01606-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2024] [Indexed: 05/07/2024]
Abstract
Our previous studies have shown the therapeutic efficacy of brucine dissolving-microneedles (Bru-DMNs) in treating rheumatoid arthritis (RA). Bru delivered via the DMNs can bypass some of the issues related to oral and systemic delivery, including extensive enzymatic activity, liver metabolism and in the case of systemic delivery via hypodermic needles, pain resulting from injections and needle stick injury. However, the underlying mechanism of Bru-DMNs against RA has not been investigated in depth at the pharmacokinetic-pharmacodynamic (PK-PD) level. In this study, a microdialysis-based method combined with ultra-performance liquid chromatography-tandem mass spectrometry was developed for the simultaneous and continuous sampling and quantitative analysis of blood and joint cavities in fully awake RA rats. The acquired data were analyzed by the PK-PD analysis method. Bru delivered via microneedles showed enhanced distribution and prolonged retention in the joint cavity compared to its administration in blood. The correlation between the effect of Bru and its concentration at the action site was indirect. In this study, we explored the mechanism of Bru-DMNs against RA and established a visualization method to express the PK-PD relationship of Bru-DMNs against RA. This study provides insights into the mechanism of action of drugs with potential side effects administered transdermally for RA treatment.
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Affiliation(s)
- Yunxia Wang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
- National Engineering Research Center of Miao's Medicines, Guiyang, 550025, China
| | - Changfu Yang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Wen Liu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
- School of Pharmacy, Guizhou Medical University, Guiyang, 561113, China
| | - Yongping Zhang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Qun Wang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Huanhuan Cheng
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Jianan Shi
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Xiaoshuang Yang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Shenglei Yang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Xueming Yao
- The Second Affiliated Hospital of Guizhou, University of Traditional Chinese Medicine, Guiyang, 550001, China
| | - Yonglin Wang
- Key Laboratory of Pharmaceutics of Guizhou Province, Guizhou Medical University, Guiyang, 550004, China.
| | - Xinli Song
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China.
- National Engineering Research Center of Miao's Medicines, Guiyang, 550025, China.
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Dorothee S, Sørensen G, Olsen LR, Bastlund JF, Sotty F, Belling D, Olsen MH, Mathiesen TI, Møller K, Larsen F, Birkeland P. Negligible In Vitro Recovery of Macromolecules from Microdialysis Using 100 kDa Probes and Dextran in Perfusion Fluid. Neurochem Res 2024; 49:1322-1330. [PMID: 38478218 PMCID: PMC10991005 DOI: 10.1007/s11064-024-04119-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/31/2024] [Accepted: 01/31/2024] [Indexed: 04/04/2024]
Abstract
Microdialysis is applied in neurointensive care to monitor cerebral glucose metabolism. If recoverable, macromolecules may also serve as biomarkers in brain disease and provide clues to their passage across the blood-brain barrier. Our study aimed to investigate the in vitro recovery of human micro- and macromolecules using microdialysis catheters and perfusion fluids approved for clinical use. In vitro microdialysis of a bulk solution containing physiological or supraphysiological concentrations of glucose, lactate, pyruvate, human IgG, serum albumin, and hemoglobin was performed using two different catheters and perfusion fluids. One had a membrane cut-off of 20 kDa and was used with a standard CNS perfusion fluid, and the other had a membrane cut-off of 100 kDa and was perfused with the same solution supplemented with dextran. The flow rate was 0.3 µl/min. We used both push and push-pull methods. Dialysate samples were collected at 2-h intervals for 6 h and analyzed for relative recovery of each substance. The mean relative recovery of glucose, pyruvate, and lactate was > 90% in all but two sets of experiments. In contrast, the relative recovery of human IgG, serum albumin, and hemoglobin from both bulk solutions was below the lower limit of quantification (LLOQ). Using a push-pull method, recovery of human IgG, serum albumin, and hemoglobin from a bulk solution with supraphysiological concentrations were above LLOQ but with low relative recovery (range 0.9%-1.6%). In summary, exchanging the microdialysis setup from a 20 kDa catheter with a standard perfusion fluid for a 100 kDa catheter with a perfusion solution containing dextran did not affect the relative recovery of glucose and its metabolites. However, it did not result in any useful recovery of the investigated macromolecules at physiological levels, either with or without a push-pull pump system.
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Affiliation(s)
- Spille Dorothee
- Department of Neurosurgery, University Hospital Münster, Münster, Germany
| | - G Sørensen
- H. Lundbeck A/S, Ottiliavej 9, 2500, Copenhagen, Denmark
| | - L R Olsen
- H. Lundbeck A/S, Ottiliavej 9, 2500, Copenhagen, Denmark
| | - J F Bastlund
- H. Lundbeck A/S, Ottiliavej 9, 2500, Copenhagen, Denmark
| | - F Sotty
- H. Lundbeck A/S, Ottiliavej 9, 2500, Copenhagen, Denmark
| | - D Belling
- H. Lundbeck A/S, Ottiliavej 9, 2500, Copenhagen, Denmark
| | - M H Olsen
- Department of Clinical Medicine, Blegdamsvej 3, 2200, Copenhagen N, Denmark
| | - T I Mathiesen
- Department of Neurosurgery, Rigshospitalet, Inge Lehmannsvej 6, 2100, Copenhagen Ø, Denmark
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3, Copenhagen, Denmark
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - K Møller
- Department of Clinical Medicine, Blegdamsvej 3, 2200, Copenhagen N, Denmark
| | - F Larsen
- H. Lundbeck A/S, Ottiliavej 9, 2500, Copenhagen, Denmark
| | - P Birkeland
- Department of Neurosurgery, Rigshospitalet, Inge Lehmannsvej 6, 2100, Copenhagen Ø, Denmark.
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Xu X, Zuo Y, Chen S, Hatami A, Gu H. Advancements in Brain Research: The In Vivo/In Vitro Electrochemical Detection of Neurochemicals. BIOSENSORS 2024; 14:125. [PMID: 38534232 DOI: 10.3390/bios14030125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/12/2024] [Accepted: 02/20/2024] [Indexed: 03/28/2024]
Abstract
Neurochemicals, crucial for nervous system function, influence vital bodily processes and their fluctuations are linked to neurodegenerative diseases and mental health conditions. Monitoring these compounds is pivotal, yet the intricate nature of the central nervous system poses challenges. Researchers have devised methods, notably electrochemical sensing with micro-nanoscale electrodes, offering high-resolution monitoring despite low concentrations and rapid changes. Implantable sensors enable precise detection in brain tissues with minimal damage, while microdialysis-coupled platforms allow in vivo sampling and subsequent in vitro analysis, addressing the selectivity issues seen in other methods. While lacking temporal resolution, techniques like HPLC and CE complement electrochemical sensing's selectivity, particularly for structurally similar neurochemicals. This review covers essential neurochemicals and explores miniaturized electrochemical sensors for brain analysis, emphasizing microdialysis integration. It discusses the pros and cons of these techniques, forecasting electrochemical sensing's future in neuroscience research. Overall, this comprehensive review outlines the evolution, strengths, and potential applications of electrochemical sensing in the study of neurochemicals, offering insights into future advancements in the field.
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Affiliation(s)
- Xiaoxuan Xu
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Yimei Zuo
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Shu Chen
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Amir Hatami
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, P.O. Box 45195-1159, Zanjan 45137-66731, Iran
- Department of Chemistry and Molecular Biology, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Hui Gu
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
- Department of Chemistry and Molecular Biology, University of Gothenburg, 405 30 Gothenburg, Sweden
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8
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Newton JB, Nuss CA, Weiss SN, Betts RL, Soslowsky LJ. Novel application of in vivo microdialysis in a rat Achilles tendon acute injury model. J Appl Physiol (1985) 2024; 136:43-52. [PMID: 37969085 PMCID: PMC11212791 DOI: 10.1152/japplphysiol.00720.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/10/2023] [Accepted: 11/10/2024] [Indexed: 11/17/2023] Open
Abstract
Tendon injury and healing involve intricate changes to tissue metabolism, biology, and inflammation. Current techniques often require animal euthanasia or tissue destruction, limiting assessment of dynamic changes in tendon, including treatment response, disease development, rupture risk, and healing progression. Microdialysis, a minimally invasive technique, offers potential for longitudinal assessment, yet it has not been applied to rat tendon models. Therefore, the objective of this study is to adapt a novel application of an in vivo assay, microdialysis, using acute injury as a model for extreme disruption of the tendon homeostasis. We hypothesize that microdialysis will be able to detect measurable differences in the healing responses of acute injury with high specificity and sensitivity. Overall results suggest that microdialysis is a promising in vivo technique for longitudinal assessment for this system with strong correlations between extracellular fluid (ECF) and dialysate concentrations and reasonable recovery rates considering the limitations of this model. Strong positive correlations were found between dialysate and extracellular fluid (ECF) concentration for each target molecule of interest including metabolites, inflammatory mediators, and collagen synthesis and degradation byproducts. These results suggest that microdialysis is capable of detecting changes in tendon healing following acute tendon injury with high specificity and sensitivity. In summary, this is the first study to apply microdialysis to a rat tendon model and assess its efficacy as a direct measurement of tendon metabolism, biology, and inflammation.NEW & NOTEWORTHY This study adapts a novel application of microdialysis to rat tendon models, offering a minimally invasive avenue for longitudinal tendon assessment. Successfully detecting changes in tendon healing after acute injury, it showcases strong correlations between extracellular fluid and dialysate concentrations. The results highlight the potential of microdialysis as a direct measure of tendon metabolism, biology, and inflammation, bypassing the need for animal euthanasia and tissue destruction.
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Affiliation(s)
- Joseph B Newton
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Courtney A Nuss
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Stephanie N Weiss
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Rebecca L Betts
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Louis J Soslowsky
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, United States
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Hermans E, Devreese M, Zeitlinger M, Dhont E, Verougstraete N, Colman R, Vande Walle J, De Paepe P, De Cock PA. Microdialysis as a safe and feasible method to study target-site piperacillin-tazobactam disposition in septic piglets and children. Int J Antimicrob Agents 2023; 62:106970. [PMID: 37716576 DOI: 10.1016/j.ijantimicag.2023.106970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 08/17/2023] [Accepted: 09/09/2023] [Indexed: 09/18/2023]
Abstract
OBJECTIVES Knowledge on the tissue penetration of piperacillin-tazobactam in children with sepsis is lacking. In this study, the feasibility and performance of microdialysis experiments were explored in septic piglets and children as part of a translational research project. METHODS Multiple-day microdialysis investigations were performed in muscle tissue of 22 piglets (of which 11 were septic) and 6 children with sepsis. An in vitro experiment preceded the (pre)clinical trials to derive optimal experimental settings and calibration technique. Linear mixed-effects models quantified the impact of sepsis on relative recovery (RR) and intercatheter, interindividual, interoccasion, and residual variability. RESULTS In vivo microdialysis was well tolerated in piglets and children, with no significant adverse events reported. Using identical experimental settings, lower RR values were recorded in healthy and septic piglets (range: piperacillin, 17.2-29.1% and tazobactam, 23.5-29.1%) compared with the in vitro experiment (piperacillin, 43.3% and tazobactam, 55.3%), and there were unacceptably low values in children with sepsis (<10%). As a result, methodological changes were made in the pediatric trial. Realistic tissue concentration-time curves were derived in piglets and children. In piglets, sepsis reduced the RR. The greatest contributors to RR variability were residual (>40%) and interoccasion (>30%) variability. The internal standard method was the preferred calibration technique in both piglets and children. CONCLUSIONS Microdialysis is a safe and applicable method for the measurement of tissue drug concentrations in piglets and children. This study demonstrated the impact of experimental settings, sepsis, and target population on individual RR.
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Affiliation(s)
- Eline Hermans
- Department of Basic and Applied Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, C. Heymanslaan 10, 9000, Ghent, Belgium; Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium; Department of Pediatrics, Ghent University Hospital, C. Heymanslaan 10, 9000, Ghent, Belgium.
| | - Mathias Devreese
- Department of Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Markus Zeitlinger
- Department of Clinical Pharmacology, Medical University Vienna, Vienna, Austria
| | - Evelyn Dhont
- Department of Basic and Applied Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, C. Heymanslaan 10, 9000, Ghent, Belgium; Department of Pediatric Intensive Care, Ghent University Hospital, C. Heymanslaan 10, 9000, Ghent, Belgium
| | - Nick Verougstraete
- Department of Laboratory Medicine, Ghent University Hospital, C. Heymanslaan 10, 9000, Ghent, Belgium
| | - Roos Colman
- Biostatistics Unit, Faculty of Medicine and Health Sciences, Ghent University, C. Heymanslaan 10, 9000, Ghent, Belgium
| | - Johan Vande Walle
- Department of Internal Medicine and Pediatrics, Faculty of Medicine and Health Sciences, Ghent University, C. Heymanslaan 10, 9000, Ghent, Belgium; Department of Pediatric Nephrology, SafePeDrug, Erknet center, Ghent University Hospital, C. Heymanslaan 10, 9000, Ghent, Belgium
| | - Peter De Paepe
- Department of Basic and Applied Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, C. Heymanslaan 10, 9000, Ghent, Belgium; Department of Emergency Medicine, Ghent University Hospital, C. Heymanslaan 10, 9000, Ghent, Belgium
| | - Pieter A De Cock
- Department of Basic and Applied Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, C. Heymanslaan 10, 9000, Ghent, Belgium; Department of Pediatric Intensive Care, Ghent University Hospital, C. Heymanslaan 10, 9000, Ghent, Belgium; Department of Pharmacy, Ghent University Hospital, C. Heymanslaan 10, 9000, Ghent, Belgium.
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10
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Lilleøre JG, Vittrup S, Tøstesen SK, Hanberg P, Stilling M, Bue M. Comparison of Intravenous Microdialysis and Standard Plasma Sampling for Monitoring of Vancomycin and Meropenem Plasma Concentrations-An Experimental Porcine Study. Antibiotics (Basel) 2023; 12:antibiotics12040791. [PMID: 37107154 PMCID: PMC10135263 DOI: 10.3390/antibiotics12040791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/13/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
Microdialysis is a catheter-based method suitable for dynamic sampling of unbound antibiotic concentrations. Intravenous antibiotic concentration sampling by microdialysis has several advantages and may be a superior alternative to standard plasma sampling. We aimed to compare concentrations obtained by continuous intravenous microdialysis sampling and by standard plasma sampling of both vancomycin and meropenem in a porcine model. Eight female pigs received 1 g of both vancomycin and meropenem, simultaneously over 100 and 10 min, respectively. Prior to drug infusion, an intravenous microdialysis catheter was placed in the subclavian vein. Microdialysates were collected for 8 h. From a central venous catheter, plasma samples were collected in the middle of every dialysate sampling interval. A higher area under the concentration/time curve and peak drug concentration were found in standard plasma samples compared to intravenous microdialysis samples, for both vancomycin and meropenem. Both vancomycin and meropenem concentrations obtained with intravenous microdialysis were generally lower than from standard plasma sampling. The differences in key pharmacokinetic parameters between the two sampling techniques underline the importance of further investigations to find the most suitable and reliable method for continuous intravenous antibiotic concentration sampling.
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Affiliation(s)
- Johanne Gade Lilleøre
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Sofus Vittrup
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Sara Kousgaard Tøstesen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Pelle Hanberg
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Mats Bue
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
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11
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Lilleøre JG, Jørgensen AR, Knudsen MB, Hanberg P, Öbrink-Hansen K, Tøstesen SK, Søballe K, Stilling M, Bue M. Steady-State Piperacillin Concentrations in the Proximity of an Orthopedic Implant: A Microdialysis Porcine Study. Antibiotics (Basel) 2023; 12:antibiotics12030615. [PMID: 36978481 PMCID: PMC10045023 DOI: 10.3390/antibiotics12030615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/14/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
Implant-associated osteomyelitis is one of the most feared complications following orthopedic surgery. Although the risk is low, sufficient antibiotic protection of the implant surface is important. The aim of this study was to assess steady-state piperacillin concentrations in the proximity of an orthopedic implant. Time above the minimal inhibitory concentration (fT>MIC) was evaluated for MIC of 8 (low target) and 16 μg/mL (high target). Six female pigs received an intravenous bolus infusion of 4 g/0.5 g piperacillin/tazobactam over 30 min every 6 h. Steady state was assumed achieved in the third dosing interval (12-18 h). Microdialysis catheters were placed in a cannulated screw in the proximal tibial cancellous bone, in cancellous bone next to the screw, and in cancellous bone on the contralateral tibia. Dialysates were collected from time 12 to 18 h and plasma samples were collected as reference. For the low piperacillin target (8 µg/mL), comparable mean fT>MIC across all the investigated compartments (mean range: 54-74%) was found. For the high target (16 µg/mL), fT>MIC was shorter inside the cannulated screw (mean: 16%) than in the cancellous bone next to the screw and plasma (mean range: 49-54%), and similar between the two cancellous bone compartments. To reach more aggressive piperacillin fT>MIC targets in relation to the implant, alternative dosing regimens such as continuous infusion may be considered.
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Affiliation(s)
- Johanne Gade Lilleøre
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Andrea René Jørgensen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Martin Bruun Knudsen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Pelle Hanberg
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Kristina Öbrink-Hansen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Department of Infectious Diseases, Internal Medicine, Gødstrup Hospital, 7400 Herning, Denmark
| | - Sara Kousgaard Tøstesen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Kjeld Søballe
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Mats Bue
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark
- Aarhus Denmark Microdialysis Research Group (ADMIRE), Aarhus University Hospital, 8200 Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
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12
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Piperacillin Steady State Concentrations in Target Tissues Relevant for PJI Treatment—A Randomized Porcine Microdialysis Study Comparing Continuous Infusion with Intermittent Short-Term Infusion. Antibiotics (Basel) 2023; 12:antibiotics12030577. [PMID: 36978444 PMCID: PMC10044349 DOI: 10.3390/antibiotics12030577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023] Open
Abstract
(1) Introduction: Piperacillin is a common antibiotic choice in the treatment of periprosthetic joint infections (PJI) caused by Pseudomonas aeruginosa. The aim of this study was to assess and compare the time with free piperacillin concentration above the minimum inhibitory concentration (fT > MIC) at steady state in target tissues relevant for PJI treatment following continuous and intermittent short-term infusion. (2) Methods: 16 pigs were randomized to receive either continuous or intermittent short-term infusion of piperacillin. Steady state piperacillin concentrations were assessed using microdialysis in tibial cortical bone, tibial cancellous bone, synovial fluid of the knee joint, and subcutaneous tissue. MIC-targets of 4, 8, 16, and 64 mg/L were applied. Plasma samples were obtained as reference. (3) Results: Continuous infusion resulted in longer fT > MIC for MIC targets of 4 mg/L and 8 mg/L compared to intermittent short-term infusion in all compartments with the exception of tibial cortical bone. For the MIC-target of 16 mg/L, continuous infusion resulted in a longer fT > MIC in all compartments except for the bone compartments. No differences between groups were seen when applying a MIC-target of 64 mg/L. (4) Conclusions: An aggressive dosing strategy may be necessary to obtain sufficient piperacillin concentrations in all bone compartments, particularly if more aggressive targets are applied. Based on the present study, continuous infusion should be considered in the treatment of PJI.
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Guillot AJ, Martínez-Navarrete M, Garrigues TM, Melero A. Skin drug delivery using lipid vesicles: A starting guideline for their development. J Control Release 2023; 355:624-654. [PMID: 36775245 DOI: 10.1016/j.jconrel.2023.02.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 02/02/2023] [Accepted: 02/02/2023] [Indexed: 02/14/2023]
Abstract
Lipid vesicles can provide a cost-effective enhancement of skin drug absorption when vesicle production process is optimised. It is an important challenge to design the ideal vesicle, since their properties and features are related, as changes in one affect the others. Here, we review the main components, preparation and characterization methods commonly used, and the key properties that lead to highly efficient vesicles for transdermal drug delivery purposes. We stand by size, deformability degree and drug loading, as the most important vesicle features that determine the further transdermal drug absorption. The interest in this technology is increasing, as demonstrated by the exponential growth of publications on the topic. Although long-term preservation and scalability issues have limited the commercialization of lipid vesicle products, freeze-drying and modern escalation methods overcome these difficulties, thus predicting a higher use of these technologies in the market and clinical practice.
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Affiliation(s)
- Antonio José Guillot
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, Avda. Vicente A. Estelles SN, Burjassot (Valencia), Spain
| | - Miquel Martínez-Navarrete
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, Avda. Vicente A. Estelles SN, Burjassot (Valencia), Spain
| | - Teresa M Garrigues
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, Avda. Vicente A. Estelles SN, Burjassot (Valencia), Spain
| | - Ana Melero
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, Avda. Vicente A. Estelles SN, Burjassot (Valencia), Spain.
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14
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Chen L, Wei N, Jiang Y, Yuan C, Xu L, Li J, Kong M, Chen Y, Wang Q. Comparative pharmacokinetics of seven bioactive components after oral administration of crude and processed Qixue Shuangbu Prescription in chronic heart failure rats by microdialysis combined with UPLC-MS/MS. JOURNAL OF ETHNOPHARMACOLOGY 2023; 303:116035. [PMID: 36513265 DOI: 10.1016/j.jep.2022.116035] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/03/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Qixue Shuangbu Prescription (QSP) is a classical traditional Chinese medicine prescription, which has widely used for the treatment of chronic heart failure (CHF). Preliminary clinical studies have shown that the efficacy of processed QSP (P-QSP) in treating CHF is greater than crude QSP (C-QSP). However, the pharmacokinetic characteristics of its major bioactive components under pathological conditions are unclear. AIM OF STUDY This study aims to compare pharmacokinetics of seven bioactive components after oral administration of C-QSP and P-QSP in CHF model rats. MATERIALS AND METHODS Ginsenoside Rb1, ginsenoside Re, ginsenoside Rg1, ferulic acid, astragaloside IV, calycosin-7-O-β-D-glucoside, and paeoniflorin in QSP were used as the target components. CHF model in rats was induced by the intraperitoneal injection of doxorubicin. A microdialysis combined with UPLC-MS/MS method was first established to compare the pharmacokinetics of seven major bioactive components in CHF model rats after oral administration of C-QSP and P-QSP. RESULTS This method was successfully applied to the pharmacokinetic investigation of seven major components of C-QSP and P-QSP following oral administration in CHF model rats. Compared with the C-QSP group, the Cmax, AUC0-t and AUC0-∞ of ginsenoside Rb1, ginsenoside Re, ginsenoside Rg1, ferulic acid, astragaloside IV and paeoniflorin significantly increased (P < 0.05) in the P-QSP group, which suggested that the absorptivity and bioavailability were increased. Lower T1/2, MRT0-t of ginsenoside Rb1, gerulic acid and higher T1/2, MRT0-t of ginsenoside Rb1, astragaloside IV, paeoniflorin in the P-QSP group, which indicated that eliminated more quickly or slowly, respectively. CONCLUSIONS The pharmacokinetic parameters of bioactive components were significantly changed for better bioavailability and absorption, longer lasting time elimination, which were beneficial for enhancing therapeutic efficacy in the P-QSP group. This study will provide a new perspective to explain the pharmacokinetic-pharmacodynamic correlation of P-QSP on the treatment of CHF.
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Affiliation(s)
- Linwei Chen
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China; Department of Cardiology, Taizhou Hospital Affiliated to Nanjing University of Chinese Medicine, Taizhou, 225300, China.
| | - Nina Wei
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Yong Jiang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Chengye Yuan
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China; Department of Cardiology, Taizhou Hospital Affiliated to Nanjing University of Chinese Medicine, Taizhou, 225300, China.
| | - Luwei Xu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China; Department of Cardiology, Taizhou Hospital Affiliated to Nanjing University of Chinese Medicine, Taizhou, 225300, China.
| | - Jindong Li
- Department of Pharmacy, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou, 225300, China.
| | - Min Kong
- Department of Pharmacy, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou, 225300, China.
| | - Yan Chen
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China; Department of Cardiology, Taizhou Hospital Affiliated to Nanjing University of Chinese Medicine, Taizhou, 225300, China.
| | - Qin Wang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China; Department of Cardiology, Taizhou Hospital Affiliated to Nanjing University of Chinese Medicine, Taizhou, 225300, China.
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Pharmacokinetic Study of Triptolide Nanocarrier in Transdermal Drug Delivery System-Combination of Experiment and Mathematical Modeling. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020553. [PMID: 36677610 PMCID: PMC9866283 DOI: 10.3390/molecules28020553] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/26/2022] [Accepted: 01/01/2023] [Indexed: 01/09/2023]
Abstract
Compared with traditional oral and injection administration, the transdermal administration of traditional Chinese medicine has distinctive characteristics and advantages, which can avoid the "first pass effect" of the liver and the destruction of the gastrointestinal tract, maintain a stable blood concentration, and prolong drug action time. However, the basic theory and technology research in transdermal drug delivery are relatively limited at present, especially regarding research on new carriers of transdermal drug delivery and pharmacokinetic studies of the skin, which has become a bottleneck of transdermal drug delivery development. Triptolide is one of the main active components of Tripterygium wilfordii, which displays activities against mouse models of polycystic kidney disease and pancreatic cancer but its physical properties and severe toxicity limit its therapeutic potential. Due to the previously mentioned advantages of transdermal administration, in this study, we performed a detail analysis of the pharmacokinetics of a new transdermal triptolide delivery system. Triptolide nanoemulsion gels were prepared and served as new delivery systems, and the ex vivo characteristics were described. The metabolic characteristics of the different triptolide transdermal drug delivery formulations were investigated via skin-blood synchronous microdialysis combined with LC/MS. A multiscale modeling framework, molecular dynamics and finite element modeling were adopted to simulate the transport process of triptolide in the skin and to explore the pharmacokinetics and mathematical patterns. This study shows that the three-layer model can be used for transdermal drug delivery system drug diffusion research. Therefore, it is profitable for transdermal drug delivery system design and the optimization of the dosage form. Based on the drug concentration of the in vivo microdialysis measurement technology, the diffusion coefficient of drugs in the skin can be more accurately measured, and the numerical results can be verified. Therefore, the microdialysis technique combined with mathematical modeling provides a very good platform for the further study of transdermal delivery systems. This research will provide a new technology and method for the study of the pharmacokinetics of traditional Chinese medicine transdermal drug delivery. It has important theoretical and practical significance in clarifying the metabolic transformation of percutaneous drug absorption and screening for appropriate drugs and dosage forms of transdermal drug delivery.
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Accelerator mass spectrometry for quantification of micro- and therapeutic dose diclofenac in microdialysis samples. Bioanalysis 2022; 14:1111-1122. [PMID: 36165918 DOI: 10.4155/bio-2022-0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: Microdialysis sampling after drug microdosing may provide tissue pharmacokinetic data early in clinical drug development. However, low administered doses and small sample volumes pose an analytical challenge, particularly for highly protein-bound drugs. Materials & methods: Carbon-14 [14C]diclofenac was used as a model drug to assess the technical and analytical feasibility of in vivo microdialysis after microdose administration in an in vitro setup. Results: [14C]diclofenac dialysate concentrations were accurately quantified with accelerator MS. [14C]diclofenac dialysate recoveries were similar in the presence and absence of therapeutic diclofenac concentrations but were considerably decreased when albumin was added to the immersion solution, suggesting high protein binding. Conclusion: These results demonstrate the feasibility of combining microdosing and microdialysis to assess tissue pharmacokinetics.
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Hvistendahl MA, Bue M, Hanberg P, Kaspersen AE, Schmedes AV, Stilling M, Høy K. Cefuroxime concentrations in the anterior and posterior column of the lumbar spine - an experimental porcine study. Spine J 2022; 22:1434-1441. [PMID: 35671945 DOI: 10.1016/j.spinee.2022.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 03/04/2022] [Accepted: 05/26/2022] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Surgical site infection following spine surgery is associated with increased morbidity and mortality. Perioperative antibiotic prophylaxis is a key factor in lowering the risk of acquiring an infection. Previous studies have assessed perioperative cefuroxime concentrations in the anterior column of the cervical spine with an anterior surgical approach. However, the majority of surgeries are performed in the posterior column and many surgeries involve the lumbar spine. PURPOSE The objective of this study was to compare the perioperative tissue concentrations of cefuroxime in the anterior and posterior column during lumbar spine surgery with a posterior surgical approach. STUDY DESIGN In vivo experimental pharmacokinetic study of cefuroxime concentrations in an acute preclinical porcine model. METHODS The lumbar vertebral column was exposed from L1 to L5 in 8 female pigs. Microdialysis catheters were placed for sampling in the anterior column (vertebral body) and posterior column (posterior arch) within the same vertebra (L5). Cefuroxime (1.5 g) was administered intravenously. Microdialysates and plasma samples were continuously obtained over 8 hours. Cefuroxime concentrations were quantified by Ultra High Performance Liquid Chromatography Tandem Mass Spectrometry. The primary endpoint was the time above the cefuroxime clinical breakpoint minimal inhibitory concentration (T>MIC) for Staphylococcus aureus of 4 µg/mL. The secondary endpoint was tissue penetration (AUCtissue/AUCplasma). RESULTS Mean T>MIC 4 µg/mL (95% confidence interval) was 123 min (105-141) in plasma, 97 min (79-115) in the anterior column and 93 min (75-111) in the posterior column. Tissue penetration (95% confidence interval) was incomplete for both the anterior column 0.48 (0.40-0.56) and posterior column 0.40 (0.33-0.48). CONCLUSIONS T>MIC was comparable between the anterior and posterior column. Mean cefuroxime concentrations decreased below the clinical breakpoint minimal inhibitory concentration for S. aureus of 4 µg/mL after 123 minutes (plasma), 97 minutes (anterior column) and 93 minutes (posterior column). This is shorter than the duration of most lumbar spine surgeries, and therefore alternative dosing regimens should be considered in posterior open lumbar spine surgeries lasting more than 1.5 hours. CLINICAL SIGNIFICANCE Open lumbar spine surgery often involves extensive soft tissue dissection, stripping and retraction of the paraspinal muscles which may impair the local blood flow exposing the lumbar vertebra to postoperative infections. A single intravenous administration of 1.5 g cefuroxime only provided sufficient prophylactic target tissue concentrations in the vertebra of the lumbar spine for up to 1.5 hours.
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Affiliation(s)
- Magnus A Hvistendahl
- Department of Clinical Medicine, Aarhus University, Aarhus N, Central Denmark Region, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopedic Research Laboratory, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark.
| | - Mats Bue
- Department of Clinical Medicine, Aarhus University, Aarhus N, Central Denmark Region, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopedic Research Laboratory, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark; Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark
| | - Pelle Hanberg
- Department of Clinical Medicine, Aarhus University, Aarhus N, Central Denmark Region, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopedic Research Laboratory, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark
| | - Alexander Emil Kaspersen
- Department of Clinical Medicine, Aarhus University, Aarhus N, Central Denmark Region, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopedic Research Laboratory, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark
| | - Anne Vibeke Schmedes
- Department of Clinical Biochemistry and Immunology, Hospital Lillebaelt, Vejle, Southern Denmark Region, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, Aarhus N, Central Denmark Region, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopedic Research Laboratory, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark; Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark
| | - Kristian Høy
- Department of Clinical Medicine, Aarhus University, Aarhus N, Central Denmark Region, Denmark; Aarhus Denmark Microdialysis Research (ADMIRE), Orthopedic Research Laboratory, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark; Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus N, Central Denmark Region, Denmark
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Petersen EK, Hanberg P, Knudsen M, Tøstesen SK, Jørgensen AR, Öbrink-Hansen K, Søballe K, Stilling M, Bue M. Intermittent Short-Term Infusion vs. Continuous Infusion of Piperacillin: Steady State Concentrations in Porcine Cervical Spine Tissue Evaluated by Microdialysis. Antibiotics (Basel) 2022; 11:antibiotics11070910. [PMID: 35884164 PMCID: PMC9312177 DOI: 10.3390/antibiotics11070910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 01/25/2023] Open
Abstract
Background: Piperacillin is a central drug in the treatment of Pseudomonas aeruginosa spondylodiscitis. Intermittent short-term infusion (STI) remains standard treatment in most centres, although the application of continuous infusion (CI) has shown promising results in other clinical settings. We aimed to evaluate time above the minimal inhibitory concentration (fT > MIC) of the free fraction of piperacillin in steady state conditions in porcine cervical spine tissue following CI and STI using microdialysis with MIC targets of 4, 8, and 16 μg/mL. Methods: 16 female pigs were randomized to receive piperacillin/tazobactam as STI (4/0.5 g every 6 h) or CI (4/0.5 g as a bolus followed by 12/1.5 g) for 18 h. Microdialysis catheters were placed for sampling of piperacillin concentrations from the intervertebral disc, vertebral cancellous bone, paravertebral muscle, and adjacent subcutaneous tissue during the third dosing interval (12−18 h). Blood samples were collected as reference. Results: CI resulted in fT > MIC > 82% across all compartments and targets, except for intervertebral disc (37%) and vertebral cancellous bone (28%) at MIC = 16 μg/mL. In Group STI, >72% fT > MIC was reached for MIC = 4 μg/mL in all investigated compartments, while for MIC = 16 μg/mL only subcutaneous tissue exhibited fT > MIC > 50%. Conclusion: CI of piperacillin resulted in higher fT > MIC compared to STI infusion across the investigated tissues and targets. CI should therefore be considered in spondylodiscitis cases requiring piperacillin treatment.
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Affiliation(s)
- Elisabeth Krogsgaard Petersen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, 8200 Aarhus, Denmark
- Correspondence: ; Tel.: +45-5058-2067
| | - Pelle Hanberg
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Martin Knudsen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Sara Kousgaard Tøstesen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Andrea René Jørgensen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Kristina Öbrink-Hansen
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Department of Infectious Diseases, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Kjeld Søballe
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Department of Orthopaedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, 8200 Aarhus, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Mats Bue
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus, Denmark; (P.H.); (M.K.); (S.K.T.); (A.R.J.); (K.Ö.-H.); (K.S.); (M.S.); (M.B.)
- Aarhus Denmark Microdialysis Research (ADMIRE), Orthopaedic Research Laboratory, Aarhus University Hospital, 8200 Aarhus, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, 8200 Aarhus, Denmark
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Teixidor J, Novello S, Ortiz D, Menin L, Lashuel HA, Bertsch A, Renaud P. On-Demand Nanoliter Sampling Probe for the Collection of Brain Fluid. Anal Chem 2022; 94:10415-10426. [PMID: 35786947 DOI: 10.1021/acs.analchem.2c01577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Continuous fluidic sampling systems allow collection of brain biomarkers in vivo. Here, we propose a new sequential and intermittent sampling paradigm using droplets, called Droplet on Demand (DoD). It is implemented in a microfabricated neural probe and alternates phases of analyte removal from the tissue and phases of equilibration of the concentration in the tissue. It allows sampling droplets loaded with molecules from the brain extracellular fluid punctually, without the long transient equilibration periods typical of continuous methods. It uses an accurately defined fluidic sequence with controlled timings, volumes, and flow rates, and correct operation is verified by the embedded electrodes and a flow sensor. As a proof of concept, we demonstrated the application of this novel approach in vitro and in vivo, to collect glucose in the brain of mice, with a temporal resolution of 1-2 min and without transient regime. Absolute quantification of the glucose level in the samples was performed by direct infusion nanoelectrospray ionization Fourier transform mass spectrometry (nanoESI-FTMS). By adjusting the diffusion time and the perfusion volume of DoD, the fraction of molecules recovered in the samples can be tuned to mirror the tissue concentration at accurate points in time. Moreover, this makes quantification of biomarkers in the brain possible within acute experiments of only 20-120 min. DoD provides a complementary tool to continuous microdialysis and push-pull sampling probes. Thus, the advances allowed by DoD will benefit quantitative molecular studies in the brain, i.e., for molecules involved in volume transmission or for protein aggregates that form in neurodegenerative diseases over long periods.
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Affiliation(s)
- Joan Teixidor
- Microsystems Laboratory 4 (STI-IEM-LMIS4), École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Salvatore Novello
- Laboratory of Molecular and Chemical Biology of Neurodegeneration (SV-BMI-LMNN), EPFL, 1015 Lausanne, Switzerland
| | - Daniel Ortiz
- Mass Spectrometry and Elemental Analysis Platform (SB-ISIC-MSEAP), EPFL, 1015 Lausanne, Switzerland
| | - Laure Menin
- Mass Spectrometry and Elemental Analysis Platform (SB-ISIC-MSEAP), EPFL, 1015 Lausanne, Switzerland
| | - Hilal A Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration (SV-BMI-LMNN), EPFL, 1015 Lausanne, Switzerland
| | - Arnaud Bertsch
- Microsystems Laboratory 4 (STI-IEM-LMIS4), École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Philippe Renaud
- Microsystems Laboratory 4 (STI-IEM-LMIS4), École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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Petersen EK, Bue M, Harlev C, Jørgensen AR, Schmedes A, Hanberg P, Petersen LK, Stilling M. Abdominal tissue concentrations and penetration of carboplatin in a HIPEC procedure ‒ assessment in a novel porcine model. Pleura Peritoneum 2022; 7:117-125. [PMID: 36159212 PMCID: PMC9467902 DOI: 10.1515/pp-2022-0110] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 05/03/2022] [Indexed: 11/15/2022] Open
Abstract
Objectives Peritoneal dissemination from intraabdominal cancers is associated with poor prognosis and rapid disease progression. Hyperthermic intraperitoneal chemotherapy (HIPEC) is an antineoplastic treatment, which has improved survival and recurrence-free survival, but little is known about the acquired chemotherapy concentrations in local tissues. The aim of this study was to assess concentrations of carboplatin during and after HIPEC treatment dynamically and simultaneously in various abdominal organ tissues by means of microdialysis in a novel porcine model. Methods Eight pigs underwent imitation cytoreductive surgery followed by HIPEC (90 min) using a carboplatin dosage of 800 mg/m2. Microdialysis catheters were placed for sampling of drug concentrations in various solid tissues: peritoneum, liver, bladder wall, mesentery and in different depths of one mm and four mm in the hepatoduodenal ligament and rectum. During and after HIPEC, dialysates and blood samples were collected over 8 h. Results No statistically significant differences in mean AUC0-last (range: 2,657–5,176 min·µg/mL), mean Cmax (range: 10.6–26.0 µg/mL) and mean Tmax (range: 105–206 min) were found between the compartments. In plasma there was a tendency towards lower measures. No difference between compartments was found for tissue penetration. At the last samples obtained (450 min) the mean carboplatin concentrations were 4.9–9.9 µg/mL across the investigated solid tissues. Conclusions Equal carboplatin distribution in abdominal organ tissues, detectable concentrations for at least 6 h after HIPEC completion, and a carboplatin penetration depth of minimum four mm were found. The present study proposes a new HIPEC porcine model for future research.
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Affiliation(s)
- Elisabeth K. Petersen
- Department of Orthopaedic Surgery , Aarhus University Hospital , Aarhus , Denmark
- Department of Clinical Medicine , Aarhus University Hospital , Aarhus , Denmark
| | - Mats Bue
- Department of Orthopaedic Surgery , Aarhus University Hospital , Aarhus , Denmark
- Department of Clinical Medicine , Aarhus University Hospital , Aarhus , Denmark
| | - Christina Harlev
- Department of Orthopaedic Surgery , Aarhus University Hospital , Aarhus , Denmark
- Department of Clinical Medicine , Aarhus University Hospital , Aarhus , Denmark
| | - Andrea R. Jørgensen
- Department of Orthopaedic Surgery , Aarhus University Hospital , Aarhus , Denmark
- Department of Clinical Medicine , Aarhus University Hospital , Aarhus , Denmark
| | - Anne Schmedes
- Department of Biochemistry and Immunology , Lillebaelt Hospital , Vejle , Denmark
| | - Pelle Hanberg
- Department of Orthopaedic Surgery , Aarhus University Hospital , Aarhus , Denmark
- Department of Clinical Medicine , Aarhus University Hospital , Aarhus , Denmark
| | - Lone K. Petersen
- Department of Gynaecology and Obstetrics , Odense University Hospital and Department of Clinical Medicine, University of Southern Denmark , Odense , Denmark
| | - Maiken Stilling
- Department of Orthopaedic Surgery , Aarhus University Hospital , Aarhus , Denmark
- Department of Clinical Medicine , Aarhus University Hospital , Aarhus , Denmark
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Bendtsen MAF, Hanberg P, Slater J, Hansen J, Öbrink-Hansen K, Stilling M, Bue M. Steady-state concentrations of flucloxacillin in porcine vertebral cancellous bone and intervertebral disc following oral and intravenous administration assessed by microdialysis. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2022; 31:1508-1514. [PMID: 35488132 DOI: 10.1007/s00586-022-07208-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/03/2022] [Accepted: 04/05/2022] [Indexed: 11/30/2022]
Abstract
AIMS Flucloxacillin is a frequently used antibiotic in the treatment of spondylodiscitis. We assessed steady-state concentrations and time above minimal inhibitory concentration (fT > MIC) of flucloxacillin in the intervertebral disc, vertebral cancellous bone, subcutaneous tissue and plasma, after intravenous and oral administration. METHODS Sixteen pigs were randomized into two groups; Group Peroral (Group PO) and Group Intravenous (Group IV) received 1 g flucloxacillin every 6 h for 24 h orally or intravenously. Microdialysis was used for sampling in the compartments of interest. A flucloxacillin target of 50% fT > MIC was applied for three MIC targets: 0.125, 0.5 and 2.0 μg/mL. RESULTS Intravenous administration resulted in significantly longer fT > MIC for all targets. Target attainment was only reached for the low target of 0.125 μg/mL in Group IV in vertebral cancellous bone, subcutaneous tissue, and plasma (intervertebral disc 47%). In Group IV, mean fT > MIC values in the investigated compartments were in the range of 47-67% of the dosing interval for 0.125 μg/mL, 20-35% for 0.5 μg/mL, and 0-15% for 2.0 μg/mL. In Group PO, mean fT > MIC values for 0.125 μg/mL were in the range of 1-33%. No pigs reached a concentration of 0.5 μg/mL in any of the investigated compartments in Group PO. CONCLUSION Administration of 1 g flucloxacillin every 6 h resulted in surprisingly low steady-state fT > MIC after intravenous and oral administration. However, intravenous administration resulted in significantly higher concentrations across compartments compared to oral administration. Sufficient target tissue concentrations for treatment of spondylodiscitis may require a dose increase or alternative dosing regimens.
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Affiliation(s)
- Mathias A F Bendtsen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.
- Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.
- Department of Orthopedic Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus, Denmark.
| | - Pelle Hanberg
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark
- Department of Orthopedic Surgery, Horsens Regional Hospital, Horsens, Denmark
| | - Josefine Slater
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus, Denmark
| | - Jakob Hansen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Institute of Forensic Medicine, Aarhus University, Aarhus, Denmark
| | - Kristina Öbrink-Hansen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus, Denmark
| | - Mats Bue
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
- Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark
- Department of Orthopedic Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus, Denmark
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22
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Ritter L, Bergoza L, Possa E, Tasso L. Is clindamycin a potential treatment for prostatitis? APMIS 2022; 130:197-205. [PMID: 34978745 DOI: 10.1111/apm.13205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 01/02/2022] [Indexed: 11/29/2022]
Abstract
Cutibacterium acnes has been associated with chronic prostatitis, which can potentially favor the appearance of tumors in the prostate. Prostatitis is difficult to treat, and the drug needs to be able to penetrate the prostate. The aim was to investigate the pharmacokinetics of clindamycin in the interstitial fluid of rat prostate using microdialysis. Microdialysis probes were recovered in vitro and in vivo. Clindamycin was administered at 80 mg/kg iv bolus for plasma and tissue pharmacokinetic experiments. A microdialysis probe was implanted in the prostate gland for collections over an 8-hour period. The pharmacokinetic parameters were determined by both compartmental and non-compartmental approaches. Penetration was determined as the ratio between the area under the curve and the time of the clindamycin measurement in the prostate. The recovery of the in vivo probes was 38.11 ± 1.14%. The plasma profile was modeled by a two-compartment pharmacokinetic model. Clindamycin presented a prostate/plasma ratio of 1.02, with free concentrations above the minimum inhibitory concentration for Cutibacterium acnes isolates. This was the first study that determined clindamycin free concentrations in the prostatic fluid of rats. These findings suggest that clindamycin may be an effective alternative for the treatment of prostatitis caused by Cutibacterium acnes.
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Affiliation(s)
- Lisiani Ritter
- College of Pharmacy, University of Caxias do Sul, Caxias do Sul, Rio Grande do Sul, Brazil
| | - Larissa Bergoza
- College of Pharmacy, University of Caxias do Sul, Caxias do Sul, Rio Grande do Sul, Brazil
| | - Eduarda Possa
- College of Pharmacy, University of Caxias do Sul, Caxias do Sul, Rio Grande do Sul, Brazil
| | - Leandro Tasso
- College of Pharmacy, University of Caxias do Sul, Caxias do Sul, Rio Grande do Sul, Brazil.,Laboratory of Pharmacokinetics, Health Sciences Postgraduate Program and Biotechnology Postgraduate Program, University of Caxias do Sul, Caxias do Sul, Rio Grande do Sul, Brazil
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Population Pharmacokinetics of Flucloxacillin In Bone and Soft Tissue- Standard Dosing is Not Sufficient to Achieve Therapeutic Concentrations. Pharm Res 2022; 39:1633-1643. [PMID: 35233728 DOI: 10.1007/s11095-022-03197-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 02/11/2022] [Indexed: 10/19/2022]
Abstract
PURPOSE Flucloxacillin is a β-lactam penicillin commonly used in the treatment of bone and soft tissue infections. In a recent porcine study, we found surprisingly low time for which the free concentration was maintained above the minimal inhibitory concentration (fT>MIC) in bone and soft tissue, following flucloxacillin oral (PO) and intravenous (IV) administration at 1g every 6h (q6h). In addition to plasma, sampling was obtained from subcutaneous tissue, knee joint, cancellous bone and cortical bone, using microdialysis. To identify flucloxacillin dosing regimens that result in theoretically therapeutic concentrations, we developed a population pharmacokinetic (PK) model for the porcine data, and combined it with a human flucloxacillin population PK model for simulations. METHODS A four-compartment model was developed, and various dosing regimens and modes of administration were simulated. Predicted concentrations were compared to %fT>MIC (0.5 mg/L and 2 mg/L). RESULTS Continuous infusion (CI) resulted in higher %fT>MIC compared to intermittent administration. For intermittent IV dosing (4, 8 and 12g/24h), fT>MIC (0.5 mg/L) was ≥70% in plasma, and ranged between 42-96% in the sampled tissue in a typical individual. By applying CI, 4g/day was sufficient to achieve ≥98% fT>MIC (0.5 mg/L) in all sampled tissues. For MIC 2 mg/L, ≥50% fT>MIC was only achieved in plasma at CI 8 and 12g/24h and IV 3g q6h. CONCLUSIONS To reach efficacious flucloxacillin bone and tissue concentrations, dose increment or continuous infusion needs to be considered.
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Hanberg P, Bue M, Kabel J, Jørgensen AR, Jessen C, Søballe K, Stilling M. Effects of tourniquet inflation on peri- and postoperative cefuroxime concentrations in bone and tissue. Acta Orthop 2021; 92:746-752. [PMID: 34334093 PMCID: PMC8635659 DOI: 10.1080/17453674.2021.1942620] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Background and purpose - Tourniquet is widely used in orthopedic surgery to reduce intraoperative bleeding and improve visualization. We evaluated the effect of tourniquet application on peri- and postoperative cefuroxime concentrations in subcutaneous tissue, skeletal muscle, calcaneal cancellous bone, and plasma. The primary endpoint was the time for which the free cefuroxime concentration was maintained above the clinical breakpoint minimal inhibitory concentration (T > MIC) for Staphylococcus aureus (4 µg/mL).Patients and methods - 10 patients scheduled for hallux valgus or hallux rigidus surgery were included. Microdialysis catheters were placed for sampling of cefuroxime concentrations bilaterally in subcutaneous tissue, skeletal muscle, and calcaneal cancellous bone. A tourniquet was applied on the thigh of the leg scheduled for surgery (tourniquet duration time [range]: 65 minutes [58-77]). Cefuroxime (1.5 g) was administered intravenously 15 minutes prior to tourniquet inflation, followed by a second dose 6 hours later. Dialysates and venous blood samples were collected for 12 hours.Results - A cefuroxime concentration of 4 µg/mL was reached within 23 minutes in all compartments and patients. For cefuroxime the T > MIC (4 µg/mL) ranged between 4.8 and 5.4 hours across compartments, with similar results for the tourniquet and non-tourniquet leg. Comparable T > MIC and penetration ratios were found for the first and second dosing intervals.Interpretation - Administration of cefuroxime (1.5 g) 15 minutes prior to tourniquet inflation is safe in order to achieve tissue concentrations above 4 µg/mL throughout surgery. A tourniquet application time of approximately 1 hour did not affect the cefuroxime tissue penetration in the following dosing interval.
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Affiliation(s)
- Pelle Hanberg
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Horsens;;,Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N;;,Department of Clinical Medicine, Aarhus University, Aarhus N;;,Correspondence: Pelle HANBERG, Department of Orthopaedic Surgery, Horsens Regional Hospital, Horsens
| | - Mats Bue
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N;;,Department of Clinical Medicine, Aarhus University, Aarhus N;;,Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N
| | - Jesper Kabel
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Horsens
| | - Andrea René Jørgensen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N
| | - Christian Jessen
- Department of Clinical Medicine, Aarhus University, Aarhus N;;,Department of Anesthesiology, Horsens Regional Hospital, Horsens, Denmark
| | - Kjeld Søballe
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N;;,Department of Clinical Medicine, Aarhus University, Aarhus N;;,Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N
| | - Maiken Stilling
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N;;,Department of Clinical Medicine, Aarhus University, Aarhus N;;,Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N
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Godage NH, Olomukoro AA, Emmons RV, Gionfriddo E. In vivo analytical techniques facilitated by contemporary materials. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Guntner AS, Buchberger W, Hosmann A, Mercea PA, Koren J, Reinprecht A, Zeitlinger M, Herta J. Quantitative analysis of human brain microdialysate for target site pharmacokinetics of major anesthetics ketamine, midazolam and propofol. J Pharm Biomed Anal 2021; 205:114289. [PMID: 34365190 DOI: 10.1016/j.jpba.2021.114289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/26/2021] [Accepted: 07/26/2021] [Indexed: 02/02/2023]
Abstract
Brain microdialysis samples of intensive care patients treated with the essential anesthetics ketamine, midazolam and propofol were investigated. Importantly, despite decades of clinical use, comprehensive human cerebral pharmacokinetic data of these drugs is still missing. To encounter this apparent lack of knowledge, we combined cerebral microdialysis with leading-edge analytical instrumentation to monitor the neurochemistry of living human patients. For the quantitative analysis, high performing analytical approaches were developed that can handle minute sample volumes and possible ultralow target analyte levels. The developed methods provided detection limits below 100 ng L-1 for all target analytes and high precision (below 4% RSD intraday). Methods were linear between LODs and 100 μg L-1 for ketamine, 75 μg L-1 for midazolam and 10 μg L-1 for propofol respectively, with coefficients of determination R2≥ 0.999. Further, being aware of the error-prone and demanding translation of microdialysis levels to interstitial concentrations, in vitro approaches for recovery testing of microdialysis probes as well as internal normalization approaches were conducted. Thus, we herein report the first cerebral pharmacokinetic data of ketamine, midazolam and propofol determined in microdialysis samples of 15 neurointensive care patients. We could prove blood-brain barrier penetration of all of the investigated anesthetics and could correlate applied dosages and actual brain exposition of ketamine. However, we emphasize the need of an expanded prospective study including individual microdialysis recovery testing as well as matched serum and/or cerebrospinal fluid collection for a more comprehensive cerebral pharmacokinetic understanding.
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Affiliation(s)
| | - Wolfgang Buchberger
- Institute of Analytical Chemistry, Johannes Kepler University Linz, Linz, Austria
| | - Arthur Hosmann
- Department of Neurosurgery, Medical University Vienna, Vienna, Austria
| | | | - Johannes Koren
- Department of Neurology, Clinic Hietzing, Vienna, Austria; Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria
| | - Andrea Reinprecht
- Department of Neurosurgery, Medical University Vienna, Vienna, Austria
| | - Markus Zeitlinger
- Karl Landsteiner Institute for Clinical Epilepsy Research and Cognitive Neurology, Vienna, Austria; Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Johannes Herta
- Department of Neurosurgery, Medical University Vienna, Vienna, Austria.
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Knudsen M, Bue M, Pontoppidan LL, Hvistendahl MA, Søballe K, Stilling M, Hanberg P. Evaluation of Benzylpenicillin as an Internal Standard for Measurement of Piperacillin Bone Concentrations Via Microdialysis. J Pharm Sci 2021; 110:3500-3506. [PMID: 34102200 DOI: 10.1016/j.xphs.2021.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 06/03/2021] [Accepted: 06/03/2021] [Indexed: 12/01/2022]
Abstract
Microdialysis is a pharmacokinetic tool that can be advantageous when obtaining tissues' pharmacokinetic information. Since absolute extracellular tissue concentrations are needed in pharmacokinetic studies, calibrating the microdialysis system is necessary. The internal standard method is superior when compared to other calibration methods. However, thorough evaluation of the internal standard is required before it can be used. In vitro experiments and an in vivo study on pigs (n = 8) were conducted to assess the relative recoveries by gain and by loss for piperacillin, both with and without a benzylpenicillin concentration of 5 µg/mL. Furthermore, the in vivo setup allowed for an evaluation of piperacillin cancellous bone and subcutaneous tissue concentrations in a single 8 h dosing interval. Ultra-high performance liquid chromatography (UHPLC) was used to determine piperacillin and benzylpenicillin concentrations. Relative recovery by loss for benzylpenicillin and relative recovery by gain for piperacillin were similar in in vitro and in vivo. Presence of benzylpenicillin did not affect the relative recovery for piperacillin. Relative recovery, pharmacokinetic parameters and fT>MIC were similar when comparing the retrodialysis by drug and the internal standard calibration methods (p > 0.31). Mean fT>MIC (16 µg/mL) for plasma, cancellous bone and subcutaneous tissue were 232 min, 255 min and 295 min, respectively. Our findings suggest that benzylpenicillin is suitable as an internal standard for piperacillin in microdialysis studies. Mean fT>MIC (16 µg/mL) for plasma, cancellous bone, and subcutaneous tissue reached a target of 50% fT>MIC under the investigated conditions (mean range: 52%-66%); however, the target was not obtained in all pigs in all compartments. Moreover, 100% fT>MIC was not obtained in any case, suggesting that different strategies must be taken into consideration if higher targets are employed.
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Affiliation(s)
- Martin Knudsen
- Department of Clinical Medicine, Aarhus University, Denmark; Aarhus Microdialysis Research Group, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, Crossing J112, 8200 Aarhus N, Denmark.
| | - Mats Bue
- Department of Clinical Medicine, Aarhus University, Denmark; Aarhus Microdialysis Research Group, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, Crossing J112, 8200 Aarhus N, Denmark; Department of Orthopedic Surgery, Aarhus University Hospital, Denmark
| | | | - Magnus A Hvistendahl
- Department of Clinical Medicine, Aarhus University, Denmark; Aarhus Microdialysis Research Group, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, Crossing J112, 8200 Aarhus N, Denmark
| | - Kjeld Søballe
- Department of Clinical Medicine, Aarhus University, Denmark; Department of Orthopedic Surgery, Aarhus University Hospital, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, Denmark; Aarhus Microdialysis Research Group, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, Crossing J112, 8200 Aarhus N, Denmark; Department of Orthopedic Surgery, Aarhus University Hospital, Denmark
| | - Pelle Hanberg
- Department of Clinical Medicine, Aarhus University, Denmark; Aarhus Microdialysis Research Group, Aarhus University Hospital, Palle Juul-Jensens Boulevard 165, Crossing J112, 8200 Aarhus N, Denmark; Department of Orthopedic Surgery, Horsens Regional Hospital, Denmark
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Chaturvedi S, Garg A. An insight of techniques for the assessment of permeation flux across the skin for optimization of topical and transdermal drug delivery systems. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102355] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Hanberg P, Bue M, Kabel J, Jørgensen AR, Søballe K, Stilling M. Tourniquet-induced ischemia and reperfusion in subcutaneous tissue, skeletal muscle, and calcaneal cancellous bone. APMIS 2021; 129:225-231. [PMID: 33496970 DOI: 10.1111/apm.13121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 01/21/2021] [Indexed: 01/09/2023]
Abstract
This study aimed to evaluated ischemic metabolites in subcutaneous tissue, skeletal muscle, and calcaneal cancellous bone before, during, and after tourniquet application in a simultaneous paired comparison of tourniquet-exposed and non-tourniquet-exposed legs. Ten patients scheduled for hallux valgus or hallux rigidus surgery were included. Microdialysis catheters were placed to simultaneously and continuously sample the metabolites glucose, lactate, pyruvate, and glycerol bilaterally for 12 h in subcutaneous tissue, skeletal muscle, and calcaneal cancellous bone. A tourniquet was applied on the leg planned for surgery (inflation time: 15 min, mean tourniquet duration time (range): 65 (58;77) min). During tourniquet inflation, a 2- to 3-fold increase of the mean lactate/pyruvate ratio was found for all investigated tissues in the tourniquet-exposed leg compared with the non-tourniquet-exposed leg. The lactate/pyruvate ratio recovery time after tourniquet release was within 30 min for skeletal muscle, 60 min for subcutaneous tissue, and 130 min for calcaneal cancellous bone. Only the tourniquet-exposed skeletal muscles were found to be ischemic during tourniquet inflation, defined by a significant increase of the lactate/pyruvate ratio exceeding the ischemic cutoff level of 25; however, this level decreased below 25 immediately after tourniquet release. The glycerol ratio increased instantly after inflation in the tourniquet-exposed leg in skeletal muscle and subcutaneous tissue, and recovered within 60 (skeletal muscle) and 130 min (subcutaneous tissue) after tourniquet release. These findings suggest that applying tourniquet for approximately 1 h results in limited tissue ischemia and cell damage in subcutaneous tissue, skeletal muscle, and calcaneal cancellous bone.
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Affiliation(s)
- Pelle Hanberg
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Horsens, Denmark.,Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
| | - Mats Bue
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark.,Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Jesper Kabel
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Horsens, Denmark
| | - Andrea René Jørgensen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N, Denmark
| | - Kjeld Søballe
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark.,Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Maiken Stilling
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark.,Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N, Denmark
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30
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Hamilton EM, Young SD, Bailey EH, Humphrey OS, Watts MJ. Online Microdialysis-High-Performance Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry (MD-HPLC-ICP-MS) as a Novel Tool for Sampling Hexavalent Chromium in Soil Solution. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2422-2429. [PMID: 33497200 DOI: 10.1021/acs.est.0c08140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Conventional soil solution sampling of species-sensitive inorganic contaminants, such as hexavalent chromium (CrVI), may induce interconversions due to disruption of system equilibrium. The temporal resolution that these sampling methods afford may also be insufficient to capture dynamic interactions or require time-consuming and expensive analysis. Microdialysis (MD) is emerging as a minimally invasive passive sampling method in environmental science, permitting the determination of solute fluxes and concentrations at previously unobtainable spatial scales and time frames. This article presents the first use of MD coupled to high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS) for the continuous sampling and simultaneous detection of CrVI in soil solution. The performance criteria of the system were assessed using stirred solutions; good repeatability of measurement (RSD < 2.5%) was obtained for CrVI, with a detection limit of 0.2 μg L-1. The online MD-HPLC-ICP-MS setup was applied to the sampling of native CrVI in three soils with differing geochemical properties. The system sampled and analyzed fresh soil solution at 15 min intervals, offering improved temporal resolution and a significant reduction in analysis time over offline MD. Simple modifications to the chromatographic conditions could resolve additional analytes, offering a powerful tool for the study of solute fluxes in soil systems to inform research into nutrient availability or soil-to-plant transfer of potentially harmful elements.
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Affiliation(s)
- Elliott M Hamilton
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Keyworth, Nottingham NG12 5GG, U.K
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Leicestershire LE12 5RD, U.K
| | - Scott D Young
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Leicestershire LE12 5RD, U.K
| | - Elizabeth H Bailey
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Leicestershire LE12 5RD, U.K
| | - Olivier S Humphrey
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Keyworth, Nottingham NG12 5GG, U.K
| | - Michael J Watts
- Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey, Keyworth, Nottingham NG12 5GG, U.K
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Hanberg P, Bue M, Thomassen M, Løve US, Kipp JO, Harlev C, Petersen E, Søballe K, Stilling M. Influence of anastomoses on intestine ischemia and cefuroxime concentrations: Evaluated in the ileum and colon in a porcine model. World J Gastrointest Pathophysiol 2021; 12:1-13. [PMID: 33585069 PMCID: PMC7852486 DOI: 10.4291/wjgp.v12.i1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/30/2020] [Accepted: 12/08/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Anastomotic leakage is a serious complication following gastrointestinal surgery and is associated with increased morbidity and mortality. The incidence of anastomotic leakage is determined by anatomy and is reported to be between 4%-33% for colon anastomosis and 1%-3% for small intestine anastomosis. The etiology of anastomotic leakage of the intestine has been divided into three main factors: healing disturbances, communication between intra- and extra-luminal compartments, and infection. All three factors interact, and one factor will inevitably lead to the other two factors resulting in tissue ischemia, tissue necrosis, and anastomotic leakage.
AIM To evaluate ischemic metabolites and cefuroxime concentrations in both anastomosis and non-anastomosis ileum and colon in a porcine model.
METHODS Eight healthy female pigs (Danish Landrace breed, weight 58-62 kg) were included in this study. Microdialysis catheters were placed for sampling of ischemic metabolites (glucose, lactate, glycerol, and pyruvate) and cefuroxime concentrations in both anastomosis and non-anastomosis ileum and colon. Cefuroxime 1.5 g was administered as an intravenous infusion over 15 min. Subsequently, dialysates and blood samples were collected over 8 h and the ischemic metabolites and cefuroxime concentrations were quantified in all samples. The concentrations of glucose, lactate, glycerol and pyruvate were determined using the CMA 600 Microdialysis Analyzer with Reagent Set A (M Dialysis AB, Sweden), and the concentrations of cefuroxime and meropenem were quantified using a validated ultra-high-performance liquid chromatography assay.
RESULTS Only the colon anastomosis induced mean ischemic lactate/pyruvate ratios above 25 (ischemic cut-off) throughout the entire sampling interval, and simultaneously decreased glucose concentrations. The mean time for which cefuroxime concentrations were maintained above the clinical breakpoint minimal inhibitory concentration for Escherichia coli (8 µg/mL) ranged between 116-128 min across all the investigated compartments, and was similar between the anastomosis and non-anastomosis ileum and colon. For all pigs and in all the investigated compartments, a cefuroxime concentration of 8 µg/mL was reached within 10 min after administration. When comparing the pharmacokinetic parameters between the anastomosis and non-anastomosis sites for both ileum and colon, only colon Tmax and half-life differed between anastomosis and non-anastomosis (P < 0.03). Incomplete tissue penetrations were found in all tissues except for the non-anastomosis colon.
CONCLUSION Administering 1.5 g cefuroxime 10 min prior to intestine surgery seems sufficient, and effective concentrations are sustained for approximately 2 h. Only colon anastomosis was locally vulnerable to ischemia.
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Affiliation(s)
- Pelle Hanberg
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Horsens 8700, Denmark
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N 8200, Denmark
| | - Mats Bue
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N 8200, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N 8200, Denmark
| | - Maja Thomassen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
| | - Uffe Schou Løve
- Department of Surgery, Viborg Regional Hospital, Viborg 8800, Denmark
| | - Josephine Olsen Kipp
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
| | - Christina Harlev
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
| | - Elisabeth Petersen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
| | - Kjeld Søballe
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N 8200, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N 8200, Denmark
| | - Maiken Stilling
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus N 8200, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N 8200, Denmark
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus N 8200, Denmark
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32
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Bendtsen MAF, Bue M, Hanberg P, Slater J, Thomassen MB, Hansen J, Søballe K, Öbrink-Hansen K, Stilling M. Flucloxacillin bone and soft tissue concentrations assessed by microdialysis in pigs after intravenous and oral administration. Bone Joint Res 2021; 10:60-67. [PMID: 33448872 PMCID: PMC7845458 DOI: 10.1302/2046-3758.101.bjr-2020-0250.r1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Aims Flucloxacillin is commonly administered intravenously for perioperative antimicrobial prophylaxis, while oral administration is typical for prophylaxis following smaller traumatic wounds. We assessed the time, for which the free flucloxacillin concentration was maintained above the minimum inhibitory concentration (fT > MIC) for methicillin-susceptible Staphylococcus aureus in soft and bone tissue, after intravenous and oral administration, using microdialysis in a porcine model. Methods A total of 16 pigs were randomly allocated to either intravenous (Group IV) or oral (Group PO) flucloxacillin 1 g every six hours during a 24-hour period. Microdialysis was used for sampling in cancellous and cortical bone, subcutaneous tissue, and the knee joint. In addition, plasma was sampled. The flucloxacillin fT > MIC was evaluated using a low MIC target (0.5 μg/ml) and a high MIC target (2.0 μg/ml). Results Intravenous administration resulted in longer fT > MIC (0.5 μg/ml) compared to oral administration, except for cortical bone. In Group IV, all pigs reached a concentration of 0.5 μg/ml in all compartments. The mean fT > MIC (0.5 μg/ml) was 149 minutes (95% confidence interval (CI) 119 to 179; range 68 to 323) in subcutaneous tissue and 61 minutes (95% CI 29 to 94; range 0 to 121) to 106 minutes (95% CI 76 to 136; range 71 to 154) in bone tissue. In Group PO, 0/8 pigs reached a concentration of 0.5 μg/ml in all compartments. For the high MIC target (2.0 μg/ml), fT > MIC was close to zero minutes in both groups across compartments. Conclusion Although intravenous administration of flucloxacillin 1 g provided higher fT > MIC for the low MIC target compared to oral administration, concentrations were surprisingly low, particularly for bone tissue. Achievement of sufficient bone and soft tissue flucloxacillin concentrations may require a dose increase or continuous administration. Cite this article: Bone Joint Res 2021;10(1):60–67.
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Affiliation(s)
- Mathias A F Bendtsen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Mats Bue
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Pelle Hanberg
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Horsens Regional Hospital, Horsens, Denmark
| | - Josefine Slater
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Maja B Thomassen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Jakob Hansen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Institute of Forensic Medicine, Aarhus University, Aarhus, Denmark
| | - Kjeld Søballe
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Kristina Öbrink-Hansen
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Maiken Stilling
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Aarhus Microdialysis Research Group, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
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33
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Hanberg P, Bue M, Öbrink-Hansen K, Thomassen M, Søballe K, Stilling M. Timing of Antimicrobial Prophylaxis and Tourniquet Inflation: A Randomized Controlled Microdialysis Study. J Bone Joint Surg Am 2020; 102:1857-1864. [PMID: 32769808 DOI: 10.2106/jbjs.20.00076] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Tourniquets are widely used during extremity surgery. In order to prevent surgical site infection, correct timing of antimicrobial prophylaxis and tourniquet inflation is important. We aimed to evaluate the time for which the free drug concentration of cefuroxime is maintained above the minimum inhibitory concentration (t > MIC) in porcine subcutaneous adipose tissue and calcaneal cancellous bone during 3 clinically relevant tourniquet application scenarios. METHODS Twenty-four female Danish Landrace pigs were included. Microdialysis catheters were placed bilaterally for sampling of cefuroxime concentrations in calcaneal cancellous bone and subcutaneous adipose tissue, and a tourniquet was applied to a randomly picked leg of each pig. Subsequently, the pigs were randomized into 3 groups to receive 1.5 g of cefuroxime by intravenous injection 15 minutes prior to tourniquet inflation (Group A), 45 minutes prior to tourniquet inflation (Group B), and at the time of tourniquet release (Group C). The tourniquet duration was 90 minutes in all groups. Dialysates and venous blood samples were collected for 8 hours after cefuroxime administration. Cefuroxime and various ischemic marker concentrations were quantified. RESULTS Cefuroxime concentrations were maintained above the clinical breakpoint MIC for Staphylococcus aureus (4 µg/mL) in calcaneal cancellous bone and subcutaneous adipose tissue throughout the 90-minute tourniquet duration in Groups A and B. Cefuroxime administration at the time of tourniquet release (Group C) resulted in concentrations of >4 µg/mL for approximately of 3.5 hours in the tissues on the tourniquet side. Furthermore, tourniquet application induced ischemia (increased lactate:pyruvate ratio) and cell damage (increased glycerol) in subcutaneous adipose tissue and calcaneal cancellous bone. Tissue ischemia was sustained for 2.5 hours after tourniquet release in calcaneal cancellous bone. CONCLUSIONS Administration of cefuroxime (1.5 g) in the 15 to 45-minute window prior to tourniquet inflation resulted in sufficient concentrations in calcaneal cancellous bone and subcutaneous adipose tissue throughout the 90-minute tourniquet application. Furthermore, tourniquet-induced tissue ischemia fully resolved 2.5 hours after tourniquet release. CLINICAL RELEVANCE Cefuroxime administration 15 to 45 minutes prior to tourniquet inflation seems to be a safe window. If the goal is to maintain postoperative cefuroxime concentrations above relevant MIC values, our results suggest that a second dose of cefuroxime should be administered at the time of tourniquet release.
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Affiliation(s)
- Pelle Hanberg
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Horsens, Denmark
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Mats Bue
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Kristina Öbrink-Hansen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Maja Thomassen
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Kjeld Søballe
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Maiken Stilling
- Aarhus Microdialysis Research Group, Orthopaedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
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Zhao S, Li P, Wen X, Yang J. Study on the hepatobiliary behavior of Ermiao wan formula by microdialysis- LC-qTOF-MS. J Pharm Biomed Anal 2020; 189:113419. [PMID: 32599487 DOI: 10.1016/j.jpba.2020.113419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 06/02/2020] [Accepted: 06/07/2020] [Indexed: 01/31/2023]
Abstract
An improved bile microdialysis sampling technique was established and coupled with liquid chromatography quadrupole time-of-flight mass spectrometry (LC-qTOF-MS) analysis. This method was successfully applied to investigate the metabolic profiles of Ermiao wan (EMW) formula in the bile of Sprague-Dawley (SD) rats. Based on accurate mass information and fragment patterns, 23 alkaloids and lactones metabolites were tentatively identified. Their metabolic pathway involved in glucuronidation, sulfation, hydroxylation and hydrolysis. Because of the high time resolution of microdialysis, the metabolic profiles of EMW were also investigated. Jatrorrhizine, columbamine and other components showed a "double-peak" profiles, suggesting the existence of enterohepatic circulation. The developed microdialysis sampling/ LC-qTOF-MS method provides a simple and efficient research tool for understanding and clarifying the mechanism of hepatobiliary excretion of complex components.
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Affiliation(s)
- Shuling Zhao
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu, 211198, China.
| | - Ping Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu, 211198, China.
| | - Xiaodong Wen
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu, 211198, China.
| | - Jie Yang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu, 211198, China.
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Chang P, Zhang Y, Gong D, Yang L, Wang J, Liu J, Zhang W. Determination of dexmedetomidine using high performance liquid chromatography coupled with tandem mass spectrometric (HPLC-MS/MS) assay combined with microdialysis technique: Application to a pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1160:122381. [PMID: 32947190 DOI: 10.1016/j.jchromb.2020.122381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 08/05/2020] [Accepted: 09/07/2020] [Indexed: 02/08/2023]
Abstract
Dexmedetomidine, as a safe sedative, mainly exerts on the central nervous system particularly in the locus coeruleus producing arousable sedation with potential analgesic and anxiolytic effects. The quantification and pharmacokinetic investigation of dexmedetomidine in the central nervous system have been described rarely. In order to estimate the unbound dexmedetomidine concentrations in brain extracellular fluid and blood simultaneously, we employed microdialysis technique as a sampling method and primarily established a rapid, sensitive and selective high-performance liquid chromatography coupled with tandem mass spectrometry method (HPLC-MS/MS). Dexmedetomidine and the internal standard (dexmedetomidine-d4) were extracted in liquid-liquid extraction procedure with ethyl acetate from 10 μL of alkalinized microdialysate sample. After evaporation under nitrogen at room temperature, the analytes were reconstituted in acetonitrile and transferred to be detected. HPLC was performed on an Agilent Poroshell 120 Hilic column (4.6 × 100 mm, 2.7 μm) with isocratic elution at a flow rate of 0.3 mL/min by 0.1% formic acid/acetonitrile (60:40, v/v). The detection was performed on a triple quadrupole tandem mass spectrometer in the multiple reaction monitoring (MRM) mode using the respective [M+H]+ ions m/z 201.2 to m/z 95.1 for DEX and m/z 205.2 to m/z 99.1 for IS (DEX-d4). The concentration-response relationship was of good linearity over a concentration range of 1.00-1000.00 ng/mL with the correlation coefficient above 0.999. The lower limit of quantification was 1.00 ng/mL with a relative standard deviation of less than 20%. The intra- and inter-day accuracy were within ±5.00% and precision was <7.23%. The recoveries of dexmedetomidine in microdialysates were 76.61-93.38%. The validated HPLC-MS/MS method has been successfully applied to study the pharmacokinetics of dexmedetomidine in rats after a caudal vein administration.
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Affiliation(s)
- Pan Chang
- Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China; Department of Anesthesiology, West China Hospital, Sichuan University & The Research Units of West China (2018RU12), Chinese Academy of Medical Sciences, Chengdu 610041, Sichuan, China
| | - YuJun Zhang
- Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China; Department of Anesthesiology, West China Hospital, Sichuan University & The Research Units of West China (2018RU12), Chinese Academy of Medical Sciences, Chengdu 610041, Sichuan, China
| | - DeYing Gong
- Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - LingHui Yang
- Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Jing Wang
- Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Jin Liu
- Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China; Department of Anesthesiology, West China Hospital, Sichuan University & The Research Units of West China (2018RU12), Chinese Academy of Medical Sciences, Chengdu 610041, Sichuan, China
| | - WenSheng Zhang
- Laboratory of Anesthesia & Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China; Department of Anesthesiology, West China Hospital, Sichuan University & The Research Units of West China (2018RU12), Chinese Academy of Medical Sciences, Chengdu 610041, Sichuan, China.
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Pierce CF, Kwasnicki A, Lakka SS, Engelhard HH. Cerebral Microdialysis as a Tool for Assessing the Delivery of Chemotherapy in Brain Tumor Patients. World Neurosurg 2020; 145:187-196. [PMID: 32890850 DOI: 10.1016/j.wneu.2020.08.161] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 12/27/2022]
Abstract
The development of curative treatment for glioblastoma has been extremely challenging. Chemotherapeutic agents that have seemed promising have failed in clinical trials. Drugs that can successfully target cancer cells within the brain must first traverse the brain interstitial fluid. Cerebral microdialysis (CMD) is an invasive technique in which interstitial fluid can be directly sampled. CMD has primarily been used clinically in the setting of head trauma and subarachnoid hemorrhage. Our goal was to review the techniques, principles, and new data pertaining to CMD to highlight its use in neuro-oncology. We conducted a literature search using the PubMed database and selected studies in which the investigators had used CMD in either animal brain tumor models or clinical trials. The references were reviewed for additional information. Studies of CMD have shown its importance as a neurosurgical technique. CMD allows for the collection of pharmacokinetic data on drug penetrance across the blood-brain barrier and metabolic data to characterize the response to chemotherapy. Although no complications have been reported, the current CMD technique (as with any procedure) has risks and limitations, which we have described in the present report. Animal CMD experiments have been used to exclude central nervous system drug candidates from progressing to clinical trials. At present, patients undergoing CMD have been monitored in the intensive care unit, owing to the requisite tethering to the apparatus. This can be expected to change soon because of advances in microminiaturization. CMD is an extremely valuable, yet underused, technique. Future CMD applications will have central importance in assessing drug delivery to tumor cells in vivo, allowing a pathway to successful therapy for malignant brain tumors.
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Affiliation(s)
- Charles F Pierce
- Department of Neurosurgery, The University of Illinois at Chicago, Chicago, Illinois, USA
| | - Amanda Kwasnicki
- Department of Neurosurgery, The University of Illinois at Chicago, Chicago, Illinois, USA
| | - Sajani S Lakka
- Department of Medicine, The University of Illinois at Chicago, Chicago, Illinois, USA
| | - Herbert H Engelhard
- Department of Neurosurgery, The University of Illinois at Chicago, Chicago, Illinois, USA; Department of Bioengineering, The University of Illinois at Chicago, Chicago, Illinois, USA.
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Zhan X, Wu H, Wu H. Joint Synovial Fluid Metabolomics Method to Decipher the Metabolic Mechanisms of Adjuvant Arthritis and Geniposide Intervention. J Proteome Res 2020; 19:3769-3778. [DOI: 10.1021/acs.jproteome.0c00300] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiang Zhan
- The College of Pharmacy of Anhui University of Chinese Medicine, Hefei 230012, China
- Key Laboratory of Xin’an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei 230038, China
- Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei 230012, China
- Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei 230012, China
| | - Huan Wu
- The College of Pharmacy of Anhui University of Chinese Medicine, Hefei 230012, China
- Key Laboratory of Xin’an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei 230038, China
- Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei 230012, China
- Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei 230012, China
| | - Hong Wu
- The College of Pharmacy of Anhui University of Chinese Medicine, Hefei 230012, China
- Key Laboratory of Xin’an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei 230038, China
- Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei 230012, China
- Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei 230012, China
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The retinoid X receptor: a nuclear receptor that modulates the sleep-wake cycle in rats. Psychopharmacology (Berl) 2020; 237:2055-2073. [PMID: 32472163 DOI: 10.1007/s00213-020-05518-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 04/01/2020] [Indexed: 10/24/2022]
Abstract
RATIONALE The nuclear receptor retinoid X receptor (RXR) belongs to a nuclear receptor superfamily that modulates diverse functions via homodimerization with itself or several other nuclear receptors, including PPARα. While the activation of PPARα by natural or synthetic agonists regulates the sleep-wake cycle, the role of RXR in the sleep modulation is unknown. OBJECTIVES We investigated the effects of bexarotene (Bexa, a RXR agonist) or UVI 3003 (UVI, a RXR antagonist) on sleep, sleep homeostasis, levels of neurochemical related to sleep modulation, and c-Fos and NeuN expression. METHODS The sleep-wake cycle and sleep homeostasis were analyzed after application of Bexa or UVI. Moreover, we also evaluated whether Bexa or UVI could induce effects on dopamine, serotonin, norepinephrine epinephrine, adenosine, and acetylcholine contents, collected from either the nucleus accumbens or basal forebrain. In addition, c-Fos and NeuN expression in the hypothalamus was determined after Bexa or UVI treatments. RESULTS Systemic application of Bexa (1 mM, i.p.) attenuated slow-wave sleep and rapid eye movement sleep. In addition, Bexa increased the levels of dopamine, serotonin, norepinephrine epinephrine, adenosine, and acetylcholine sampled from either the nucleus accumbens or basal forebrain. Moreover, Bexa blocked the sleep rebound period after total sleep deprivation, increased in the hypothalamus the expression of c-Fos, and decreased NeuN activity. Remarkably, UVI 3003 (1 mM, i.p.) induced opposite effects in sleep, sleep homeostasis, neurochemicals levels, and c-Fos and NeuN activity. CONCLUSIONS The administration of RXR agonist or antagonist significantly impaired the sleep-wake cycle and exerted effects on the levels of neurochemicals related to sleep modulation. Moreover, Bexa or UVI administration significantly affected c-Fos and NeuN expression in the hypothalamus. Our findings highlight the neurobiological role of RXR on sleep modulation.
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McConell GK, Sjøberg KA, Ceutz F, Gliemann L, Nyberg M, Hellsten Y, Frøsig C, Kiens B, Wojtaszewski JFP, Richter EA. Insulin-induced membrane permeability to glucose in human muscles at rest and following exercise. J Physiol 2020; 598:303-315. [PMID: 31696935 DOI: 10.1113/jp278600] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 11/04/2019] [Indexed: 12/18/2022] Open
Abstract
KEY POINTS Increased insulin action is an important component of the health benefits of exercise, but its regulation is complex and not fully elucidated. Previous studies of insulin-stimulated GLUT4 translocation to the skeletal muscle membrane found insufficient increases to explain the increases in glucose uptake. By determination of leg glucose uptake and interstitial muscle glucose concentration, insulin-induced muscle membrane permeability to glucose was calculated 4 h after one-legged knee-extensor exercise during a submaximal euglycaemic-hyperinsulinaemic clamp. It was found that during submaximal insulin stimulation, muscle membrane permeability to glucose in humans increases twice as much in previously exercised vs. rested muscle and outstrips the supply of glucose, which then becomes limiting for glucose uptake. This methodology can now be employed to determine muscle membrane permeability to glucose in people with diabetes, who have reduced insulin action, and in principle can also be used to determine membrane permeability to other substrates or metabolites. ABSTRACT Increased insulin action is an important component of the health benefits of exercise, but the regulation of insulin action in vivo is complex and not fully elucidated. Previously determined increases in skeletal muscle insulin-stimulated GLUT4 translocation are inconsistent and mostly cannot explain the increases in insulin action in humans. Here we used leg glucose uptake (LGU) and interstitial muscle glucose concentration to calculate insulin-induced muscle membrane permeability to glucose, a variable not previously possible to quantify in humans. Muscle membrane permeability to glucose, measured 4 h after one-legged knee-extensor exercise, increased ∼17-fold during a submaximal euglycaemic-hyperinsulinaemic clamp in rested muscle (R) and ∼36-fold in exercised muscle (EX). Femoral arterial infusion of NG -monomethyl l-arginine acetate or ATP decreased and increased, respectively, leg blood flow (LBF) in both legs but did not affect membrane glucose permeability. Decreasing LBF reduced interstitial glucose concentrations to ∼2 mM in the exercised but only to ∼3.5 mM in non-exercised muscle and abrogated the augmented effect of insulin on LGU in the EX leg. Increasing LBF by ATP infusion increased LGU in both legs with uptake higher in the EX leg. We conclude that it is possible to measure functional muscle membrane permeability to glucose in humans and it increases twice as much in exercised vs. rested muscle during submaximal insulin stimulation. We also show that muscle perfusion is an important regulator of muscle glucose uptake when membrane permeability to glucose is high and we show that the capillary wall can be a significant barrier for glucose transport.
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Affiliation(s)
- Glenn K McConell
- Institute for Health and Sport, Victoria University, Footscray, Melbourne, Australia
| | - Kim A Sjøberg
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Frederik Ceutz
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Lasse Gliemann
- Section of Integrative Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Michael Nyberg
- Section of Integrative Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Ylva Hellsten
- Section of Integrative Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Christian Frøsig
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Bente Kiens
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Jørgen F P Wojtaszewski
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Erik A Richter
- Section of Molecular Physiology, Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
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Mangum LC, Garcia GR, Akers KS, Wenke JC. Duration of extremity tourniquet application profoundly impacts soft-tissue antibiotic exposure in a rat model of ischemia-reperfusion injury. Injury 2019; 50:2203-2214. [PMID: 31591007 DOI: 10.1016/j.injury.2019.09.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 09/16/2019] [Accepted: 09/19/2019] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Extremity tourniquet (TNK) application is an effective means of achieving compressible hemorrhage control in the emergency prehospital and clinical trauma setting. Modern United States military medical doctrine recommends TNK use to prevent lethal hemorrhage from extremity injury, followed by systemic prophylactic antibiotics to prevent wound infection. Because tissue pharmacokinetics of prophylactic antimicrobials during and after TNK-induced limb ischemia are largely unknown, this study was conducted to empirically determine the relationship between TNK application time and soft tissue antibiotic exposure in order to guide medical personnel in the management of extremity trauma. MATERIALS AND METHODS Hind limbs of anesthetized male Sprague Dawley rats were exsanguinated, and ischemia maintained by a pneumatic cuff placed at the level of the mid femur on one limb; the non-ischemic contralateral limb served as comparison tissue. Systemic prophylactic antibiotics (cefazolin, moxifloxacin, or ertapenem) were administered intravenously before or after TNK release following 2 or 4 h of ischemia with subsequent re-dosing every 12 h for 3 days. Free antibiotic in the interstitial fluid (ISF) of the tibialis anterior muscle of both hind limbs was recovered via microdialysis during ischemia and over three periods during reperfusion: immediately following TNK release, at 24 h post TNK release, and at 72 h post TNK release. Plasma and ISF free drug concentrations were determined by high-performance liquid chromatography. RESULTS Tourniquet application prevented delivery of prophylactic antibiotics into distal soft tissue for the duration of ischemia, and caused a profound reduction in skeletal muscle drug exposure for up to 72 h following TNK release. A progressive decline in tissue antibiotic exposure during reperfusion was observed as TNK times increased from 2 h to 4 h. The timing and severity of reduced drug distribution in post-ischemic skeletal muscle varied substantially among the three antibiotic classes evaluated. CONCLUSIONS Prolonged tourniquet application can significantly reduce distribution of prophylactic antibiotics into soft tissue during and after ischemia, potentially impairing prophylaxis of extremity wound infection. Our findings support the examination of alternative approaches to wound infection prophylaxis under conditions of delayed casualty evacuation when occlusive hemorrhage control measures are utilized.
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Affiliation(s)
- Lee C Mangum
- United States Army Institute of Surgical Research, 3698 Chambers Pass, Building 3611, Fort Sam Houston, TX, USA.
| | - Gerardo R Garcia
- United States Army Institute of Surgical Research, 3698 Chambers Pass, Building 3611, Fort Sam Houston, TX, USA
| | - Kevin S Akers
- United States Army Institute of Surgical Research, 3698 Chambers Pass, Building 3611, Fort Sam Houston, TX, USA; Brooke Army Medical Center, Fort Sam Houston, Texas, USA
| | - Joseph C Wenke
- United States Army Institute of Surgical Research, 3698 Chambers Pass, Building 3611, Fort Sam Houston, TX, USA
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Hanberg P, Bue M, Öbrink-Hansen K, Kabel J, Thomassen M, Tøttrup M, Søballe K, Stilling M. Simultaneous Retrodialysis by Drug for Cefuroxime Using Meropenem as an Internal Standard-A Microdialysis Validation Study. J Pharm Sci 2019; 109:1373-1379. [PMID: 31756324 DOI: 10.1016/j.xphs.2019.11.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/08/2019] [Accepted: 11/15/2019] [Indexed: 12/13/2022]
Abstract
Microdialysis is a valuable pharmacokinetic tool for obtaining samples of drug concentrations from tissues of interest. When an absolute tissue concentration is needed, a calibration of the microdialysis catheter is required. The use of an internal standard offers a number of advantages compared to standard calibration methods. However, meticulous validation both in vitro and in vivo is needed, as this method requires an internal standard with physiochemical similarities to the analyte of interest with no interference. A series of in vitro and in vivo setups were conducted to determine the relative recovery by gain and by loss for cefuroxime, with and without a constant meropenem concentration. The cefuroxime and meropenem concentrations were determined using ultra-HPLC. The main finding was that cefuroxime and meropenem relative recovery behaved similarly both in vitro and in vivo, signifying that meropenem is a representative internal standard for cefuroxime. Furthermore, cefuroxime relative recovery in vitro was not affected by either the cefuroxime concentration or the presence of meropenem, and the in vivo meropenem relative recovery was constant over 6 h.
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Affiliation(s)
- Pelle Hanberg
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Sundvej 30, 8700 Horsens, Denmark; Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark.
| | - Mats Bue
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Sundvej 30, 8700 Horsens, Denmark; Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
| | - Kristina Öbrink-Hansen
- Department of Infectious Diseases, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
| | - Jesper Kabel
- Department of Orthopaedic Surgery, Horsens Regional Hospital, Sundvej 30, 8700 Horsens, Denmark
| | - Maja Thomassen
- Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
| | - Mikkel Tøttrup
- Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Orthopaedic Surgery, Randers Regional Hospital, Skovlyvej 15, 8930 Randers NØ, Denmark
| | - Kjeld Søballe
- Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Orthopaedic Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
| | - Maiken Stilling
- Orthopaedic Research Unit, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Orthopaedic Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
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Rodríguez-Sánchez M, Escartín-Pérez RE, Leyva-Gómez G, Avalos-Fuentes JA, Paz-Bermúdez FJ, Loya-López SI, Aceves J, Erlij D, Cortés H, Florán B. Blockade of Intranigral and Systemic D3 Receptors Stimulates Motor Activity in the Rat Promoting a Reciprocal Interaction among Glutamate, Dopamine, and GABA. Biomolecules 2019; 9:E511. [PMID: 31547016 PMCID: PMC6843834 DOI: 10.3390/biom9100511] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 09/18/2019] [Accepted: 09/19/2019] [Indexed: 01/08/2023] Open
Abstract
In vivo activation of dopamine D3 receptors (D3Rs) depresses motor activity. D3Rs are widely expressed in subthalamic, striatal, and dendritic dopaminergic inputs into the substantia nigra pars reticulata (SNr). In vitro studies showed that nigral D3Rs modulate their neurotransmitter release; thus, it could be that these changes in neurotransmitter levels modify the discharge of nigro-thalamic neurons and, therefore, motor behavior. To determine how the in vitro responses correspond to the in vivo responses, we examined the effect of intra-nigral and systemic blockade of D3Rs in the interstitial content of glutamate, dopamine, and GABA within the SNr using microdialysis coupled to motor activity determinations in freely moving rats. Intranigral unilateral blockade of D3R with GR 103,691 increased glutamate, dopamine, and GABA. Increments correlated with increased ambulatory distance, non-ambulatory activity, and induced contralateral turning. Concomitant blockade of D3R with D1R by perfusion of SCH 23390 reduced the increase of glutamate; prevented the increment of GABA, but not of dopamine; and abolished behavioral effects. Glutamate stimulates dopamine release by NMDA receptors, while blockade with kynurenic acid prevented the increase in dopamine and, in turn, of GABA and glutamate. Finally, systemic administration of D3R selective antagonist U 99194A increased glutamate, dopamine, and GABA in SNr and stimulated motor activity. Blockade of intra-nigral D1R with SCH 23390 prior to systemic U 99194A diminished increases in neurotransmitter levels and locomotor activity. These data highlight the pivotal role of presynaptic nigral D3 and D1R in the control of motor activity and help to explain part of the effects of the in vivo administration of D3R agents.
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Affiliation(s)
- Marina Rodríguez-Sánchez
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico.
| | - Rodrigo Erick Escartín-Pérez
- Laboratory of Neurobiology of Eating, Universidad Nacional Autónoma de México, FES Iztacala, Ciudad de México 54090, Mexico.
| | - Gerardo Leyva-Gómez
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico.
| | - José Arturo Avalos-Fuentes
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico.
| | - Francisco Javier Paz-Bermúdez
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico.
| | - Santiago Iván Loya-López
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico.
| | - Jorge Aceves
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico.
| | - David Erlij
- Department of Physiology SUNY Downstate Medical Center, Brooklyn, NY 11203, USA.
| | - Hernán Cortés
- Laboratorio de Medicina Genómica, Departamento de Genética, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Ciudad de México 14389, Mexico.
| | - Benjamín Florán
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México 07360, Mexico.
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Lasley SM. The Use of Intracerebral Microdialysis to Elucidate Environmentally Induced Neurotoxic Mechanisms. CURRENT PROTOCOLS IN TOXICOLOGY 2019; 80:e72. [PMID: 30939232 PMCID: PMC6615941 DOI: 10.1002/cptx.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The technique of microdialysis permits the assessment of neurotransmitter activity and the monitoring of other cellular entities in tissue extracellular fluid. The method is widely used for quantifying biogenic amine and amino acid transmitters, peptides, administered drugs, and other molecules in response to various experimental treatments. This article provides an overview of the manner in which the methodology of intracerebral microdialysis is utilized in the field of neurotoxicology to elucidate the actions of environmental agents. The technique is employed in a variety of creative ways to address specific experimental goals involving myriad toxicants. With appropriate consideration of method parameters, investigators have also been able to address mechanistic issues in their studies. These investigations consist of sampling of neurotransmitters in extracellular fluid after various protocols of environmental metal exposure as well as assessments of blood-brain barrier permeability, the detection of reactive oxygen species, and description of the toxicodynamics of environmental agents. The purpose of this examination is not to review the investigational findings, per se, but to highlight the various approaches utilized with this methodology and the experimental questions that have been addressed. © 2019 by John Wiley & Sons, Inc.
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Affiliation(s)
- Stephen M Lasley
- Department of Cancer Biology and Pharmacology, University of Illinois College of Medicine Peoria, Peoria, Illinois
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Huang S, Chen G, Ye N, Kou X, Zhu F, Shen J, Ouyang G. Solid-phase microextraction: An appealing alternative for the determination of endogenous substances - A review. Anal Chim Acta 2019; 1077:67-86. [PMID: 31307724 DOI: 10.1016/j.aca.2019.05.054] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 02/07/2023]
Abstract
The determination of endogenous substances is of great significance for obtaining important biotic information such as biological components, metabolic pathways and disease biomarkers in different living organisms (e.g. plants, insects, animals and humans). However, due to the complex matrix and the trace concentrations of target analytes, the sample preparation procedure is an essential step before the analytes of interest are introduced into a detection instrument. Solid-phase microextraction (SPME), an emerging sample preparation technique that integrates sampling, extraction, concentration, and sample introduction into one step, has gained wide acceptance in various research fields, including in the determination of endogenous compounds. In this review, recent developments and applications of SPME for the determination of endogenous substances over the past five years are summarized. Several aspects, including the design of SPME devices (sampling configuration and coating), applications (in vitro and in vivo sampling), and coupling with emerging instruments (comprehensive two-dimensional gas chromatography (GC × GC), ambient mass spectrometry (AMS) and surface enhanced Raman scattering (SERS)) are involved. Finally, the challenges and opportunities of SPME methods in endogenous substances analysis are also discussed.
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Affiliation(s)
- Siming Huang
- Department of Radiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, No. 107 Yanjiang Road West, Guangzhou, 510120, China
| | - Guosheng Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Niru Ye
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Xiaoxue Kou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Fang Zhu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Jun Shen
- Department of Radiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, No. 107 Yanjiang Road West, Guangzhou, 510120, China.
| | - Gangfeng Ouyang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China; College of Chemistry & Molecular Engineering, Center of Advanced Analysis and Computational Science, Zhengzhou University, Kexue Avenue 100, Zhengzhou, 450001, PR China.
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Yu Y, Chandasana H, Sangari T, Seubert C, Derendorf H. Simultaneous Retrodialysis by Calibrator for Rapid In Vivo Recovery Determination in Target Site Microdialysis. J Pharm Sci 2018; 107:2259-2265. [DOI: 10.1016/j.xphs.2018.04.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 01/13/2023]
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Cytokine and Chemokine Recovery Is Increased by Colloid Perfusates during Dermal Microdialysis. MATERIALS 2018; 11:ma11050682. [PMID: 29702553 PMCID: PMC5978059 DOI: 10.3390/ma11050682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/16/2018] [Accepted: 04/23/2018] [Indexed: 01/23/2023]
Abstract
Cytokines and chemokines play important roles in cell signalling, and microdialysis is a promising tool for monitoring these inflammation markers ex vivo. Therefore, the collecting of these mediators at the highest concentrations possible is crucial. Depending on the size of the mediator of interest, the collection of these high molecular mass molecules has thus far been difficult due to their low recovery, even when using high cut-off (100 kDa) microdialysis membranes. This study aimed to optimize the recovery of various cytokines and chemokines by validating the use of different perfusates in cutaneous microdialysis, and comparing intravenous (i.v.) colloids, crystalloids, and a lipid emulsion formulations that are approved for i.v. applications. Methods: In vitro and in vivo recovery experiments using six recombinant cytokines varying in molecular size (interleukin-2 (15 kDa), interleukin-6 (20.5 kDa), interleukin-8 (8 kDa), interleukin-12p70 (70 kDa), TNF-α (17.5 kDa), and vascular endothelial growth factor (VEGF) (38 kDa)) were performed in the presence of different perfusates for i.v. applications: Ringer’s lactate, dextran 60 kDa, hydroxyethyl starch 70 kDa, and hydroxyethyl starch 200 kDa solutions as well as a lipid emulsion formulation. Recovery was determined through (i) microdialysis of cytokines and chemokines in Ringer’s lactate solution or human serum in vitro, and (ii) retrodialysis of excised porcine and human skin cadavers in vitro and porcine skin in vivo. Furthermore, we used skin trauma (catheter insertion) and Ultraviolet B irradiation of 3 × 3 cm2 skin areas to sample cytokines and chemokines in vivo and compared the amounts that were obtained using crystalloid and colloid perfusates. All the cytokines and chemokines within the dialysates were quantified through a flow cytometry-based bead array assay. Results: Overall, recovery was strongly increased by the colloids, particularly hydroxyethyl starch 70 kDa, in vitro, ex vivo, and in vivo. When compared with the recovery achieved using Ringer’s lactate, this increase was most effective for proteins ranging from 8 to 20.5 kDa. Hydroxyethyl starch 70 kDa significantly increased the recovery of interleukin (IL)-8 in human serum in vitro when compared with Ringer’s lactate. More cytokines and chemokines were recovered using colloids compared with crystalloids. However, the increase in recovery values was lower for IL-12p70 and VEGF. Conclusions: Regarding the dialysate volumes and final dialysate concentrations, colloid perfusates are overall superior to crystalloid perfusates, such as Ringer’s lactate, when sampling cytokines and chemokines, resulting in higher recoveries. However, the sampling of high-molecular-mass cytokines during microdialysis remains challenging, and experimental in vitro data are not completely comparable with data obtained ex vivo or in vivo.
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Understanding the Pathological Basis of Neurological Diseases Through Diagnostic Platforms Based on Innovations in Biomedical Engineering: New Concepts and Theranostics Perspectives. MEDICINES 2018; 5:medicines5010022. [PMID: 29495320 PMCID: PMC5874587 DOI: 10.3390/medicines5010022] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 02/14/2018] [Accepted: 02/20/2018] [Indexed: 02/07/2023]
Abstract
The pace of advancement of genomics and proteomics together with the recent understanding of the molecular basis behind rare diseases could lead in the near future to significant advances in the diagnosing and treating of many pathological conditions. Innovative diagnostic platforms based on biomedical engineering (microdialysis and proteomics, biochip analysis, non-invasive impedance spectroscopy, etc.) are introduced at a rapid speed in clinical practice: this article primarily aims to highlight how such platforms will advance our understanding of the pathological basis of neurological diseases. An overview of the clinical challenges and regulatory hurdles facing the introduction of such platforms in clinical practice, as well as their potential impact on patient management, will complement the discussion on foreseeable theranostic perspectives. Indeed, the techniques outlined in this article are revolutionizing how we (1) identify biomarkers that better define the diagnostic criteria of any given disease, (2) develop research models, and (3) exploit the externalities coming from innovative pharmacological protocols (i.e., those based on monoclonal antibodies, nanodrugs, etc.) meant to tackle the molecular cascade so far identified.
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