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Monti G, Vincke C, Lunding M, Jensen AMG, Madsen P, Muyldermans S, Kjolby M, Andersen OM. Epitope mapping of nanobodies binding the Alzheimer's disease receptor SORLA. J Biotechnol 2023; 375:17-27. [PMID: 37634829 DOI: 10.1016/j.jbiotec.2023.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/20/2023] [Accepted: 08/24/2023] [Indexed: 08/29/2023]
Abstract
Reduced levels of the Sortilin-related receptor with A-type repeats (SORLA) in different brain regions as well as in the cerebrospinal fluid have been associated with Alzheimer's disease. Methods and reagents to develop reliable detection assays to quantify SORLA and its specific isoforms are therefore much needed. Nanobodies (Nbs) are unique biomolecules derived from the blood of camelids that display advantageous physicochemical and antigen affinity properties, making them attractive tools with great relevance to both diagnostic and therapeutic applications. Here, we purified and characterized eight Nbs that were isolated from the blood of an alpaca immunized with the recombinant extracellular domain of SORLA. The selected Nbs showed high affinity to SORLA in the low nanomolar range as observed by surface plasmon resonance. For mapping of the Nbs' epitopes within the antigen, we transiently transfected HEK293 cells with a panel of SORLA deletion constructs, and developed a protocol of immunostaining by applying fluorescent dye conjugated Nbs. With this method, we showed that the selected Nbs specifically recognize a part of SORLA containing Fibronectin-type III domains, representing promising tools not only for disease clarifying research, but also for translational medicine as candidates for clinical diagnostic purposes.
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Affiliation(s)
- Giulia Monti
- Department of Biomedicine, Aarhus University, Høegh‑Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Cécile Vincke
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium; Myeloid Cell Immunology Lab, VIB Center for Inflammation Research, Brussels, Belgium
| | - Melanie Lunding
- Department of Biomedicine, Aarhus University, Høegh‑Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Anne Mette G Jensen
- Department of Biomedicine, Aarhus University, Høegh‑Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Peder Madsen
- Department of Biomedicine, Aarhus University, Høegh‑Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Serge Muyldermans
- Laboratory of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Mads Kjolby
- Department of Biomedicine, Aarhus University, Høegh‑Guldbergs Gade 10, 8000 Aarhus C, Denmark; Department of Clinical Pharmacology and Steno Diabetes Center Aarhus, Aarhus University Hospital, Denmark
| | - Olav M Andersen
- Department of Biomedicine, Aarhus University, Høegh‑Guldbergs Gade 10, 8000 Aarhus C, Denmark.
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Jónsson F, Madsen P, Jørgensen LG, Lunding M, Secher NH. [Thoracic electric impedance and fluid balance during aortic surgery]. Ugeskr Laeger 1996; 158:6256-9. [PMID: 8966807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Indices of fluid balance were evaluated during and after aortic surgery in 16 consecutive patients. Thoracic electrical impedance (TI), heart rate (HR), central venous (CVP), pulmonary artery mean (PAMP), pulmonary wedge (PWP) and mean arterial (MAP) pressures as well as fourteen arterial and venous blood gas variables were followed. Consistent with a reduction of TI during the operation, fluid balance was in excess, and it remained elevated on the first postoperative morning. The HR, MAP and PWP remained stable, while CVP and PAMP decreased. Of the determined variables only TI revealed a meaningful correlation to fluid balance (rho = -0.41; p < 0.01). The results indicate that while central venous and pulmonary artery mean pressures gave the impression of a volume deficit, the positive fluid balance was mirrored by thoracic electrical impedance.
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Affiliation(s)
- F Jónsson
- Anaestesiologisk afdeling, Rigshospitalet, København
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Abstract
Indices of fluid balance were evaluated during and after aortic surgery in 16 consecutive patients. Thoracic electrical impedance (TI), heart rate (HR), central venous (CVP), pulmonary artery mean (PAMP), pulmonary wedge (PWP) and mean arterial (MAP) pressure as well as fourteen arterial and venous blood gas variables were followed. Consistent with a reduction of T1 by 4.2 (-5.2 to 9.2) Ohm (median and range) during the operation, fluid balance was in excess of 1.8 (-0.1 to 3.3) 1 when evaporation was not taken into account, and it remained elevated by 1.3 (0.0 to 5.4) 1 on the first postoperative morning. The HR, MAP and PWP remained stable, while CVP and PAMP decreased by 6 (-2 to 13) and 6 (-1 to 22) mmHg, respectively. Of the determined variables only TI revealed a meaningful correlation to fluid balance (rho = -0.41; P < 0.01). Haemoglobin concentrations increased in proportion to the administered packed erythrocytes, while arterial oxygen saturation, pH and base excess decreased in proportion to the excess fluid. The results indicate that while central venous and pulmonary artery mean pressures gave the impression of a volume deficit, the positive fluid balance was mirrored by thoracic electrical impedance, and that even a minor increase of fluid balance may affect pulmonary function in patients subjected to aortic surgery.
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Affiliation(s)
- F Jónsson
- Department of Anaesthesia, Rigshospitalet, University of Copenhagen, Denmark
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Hansen M, Klein U, Lunding M, Mattehay C, Sørensen G. [Children in the hospital. Improved contact in new mother-infant section in Sønderborg]. Sygeplejersken 1986; 86:12-5. [PMID: 3644541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Eriksen C, Sørensen MB, Bille-Brahe NE, Skovsted P, Lunding M. Haemodynamic effects of calcium chloride administered intravenously to patients with and without cardiac disease during neurolept anaesthesia. Acta Anaesthesiol Scand 1983; 27:13-7. [PMID: 6837231 DOI: 10.1111/j.1399-6576.1983.tb01897.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
During neurolept anaesthesia, calcium chloride (15 mg/kg) was administered intravenously to two different groups of patients undergoing vascular surgery on the abdominal aorta. The patients in group I all suffered from cardiac disease and were treated with digoxin, while the patients in group II had no cardiac symptoms. Cardiovascular measurements were made during steady-state anaesthesia. In group I, CaCl2 increased cardiac index (CI) significantly while systemic vascular resistance index (SVRI) remained unchanged. Mean arterial pressure (MAP) increased. In group II, both MAP and SVRI increased while CI remained unchanged. No significant changes in heart rate were observed and no arrhythmias occurred. It is concluded that CaCl2 administered intravenously is an effective means of improving cardiac function when it is depressed by anaesthesia, underlying cardiac disease, or both.
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Møller IW, Vester-Andersen T, Steentoft A, Hjortsø E, Lunding M. Respiratory depression and morphine concentration in serum after epidural and intramuscular administration of morphine. Acta Anaesthesiol Scand 1982; 26:421-4. [PMID: 7148361 DOI: 10.1111/j.1399-6576.1982.tb01792.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The ventilatory response to carbon dioxide and the serum level of free morphine were measured in six adult patients scheduled for operation under lumbar epidural analgesia. The investigation was performed on 2 consecutive days before the operation. The measurements were performed before, and 30 and 90 min after the intramuscular administration of morphine chloride (0.15 mg/kg body weight) as well as lumbar epidural administration of morphine chloride (5 mg morphine chloride diluted in 10 ml isotonic saline). The ventilatory response to carbon dioxide was depressed significantly both 30 and 90 min after epidurally administered morphine compared to the control value, while the depression of the ventilatory response was demonstrated in only five of six patients 30 min after intramuscularly administered morphine. The peak serum levels of free morphine were reached within 20 min of administration and it seemed that the injected quantity of morphine and not the method of administration determined the serum level.
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Abstract
In a clinical, double-blind study including 45 patients, who all underwent lower abdominal or urological surgery, the analgesic effect, latency and duration of epidural application of morphine were investigated in doses of 2 and 4 mg, respectively, compared to placebo. No significant difference was found in the effect of 2 mg morphine, compared to placebo. A significant decrease in pain score was found in the group of patients who received 4 mg morphine administered epidurally; however, this effect did not occur until 60 min after epidural administration. The effect of 4 mg morphine was found to be of long duration, as eight out of 15 patients did not require any supplementary analgesics within the first 24 h, compared to two out of 14 and three out of 15 patients, respectively, in the placebo and 2-mg groups.
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Elsass P, Stibolt O, Klauber PV, Christensen SE, Lunding M. A clinical neuropsychological study of the postoperative course after three types of anaesthesia. Acta Anaesthesiol Scand 1982; 26:151-5. [PMID: 7048840 DOI: 10.1111/j.1399-6576.1982.tb01744.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In a double-blind study, 57 patients were anaesthetized with either Althesin, thiopentone, or fentanyl combined with diazepam for cystoscopies. One and a half and four hours after the administration of anaesthesia, the patients were investigated with an objective neuropsychological method, continuous Reaction Time, and with a subjective rating scale. Beecher's Mood Scale. One week later the patients answered a questionnaire about side-effects experienced during the days following anaesthesia. At the 1 1/2 h investigation, the patients were cerebrally affected, both subjectively and objectively. The CNS-dysfunction was different for the three anaesthetics. After administration of thiopentone, the patients experienced the highest degree of subjective effects but had the smallest reaction time prolongation. Fentanyl-diazepam gave the least subjective effects, but the highest degree of cerebral affection in the reaction time measurements. The effects of Althesin were intermediate. Four hours after anaesthesia, the reaction time prolongations had disappeared, except for Althesin, and only patients who had thiopentone registered subjective effects. The number of side-effects was greatest and most prolonged following thiopentone. About 25% of the patients reported that side-effects had persisted more than 1 day after anaesthesia.
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Bank-Mikkelsen OK, Steiness E, Arnold E, Hansen T, Søbye M, Lunding M. Serum Diazepam and Serum Creatine Kinase after Intra-muscular Injection of Diazepam in Two Different Vehicles. Acta Anaesthesiol Scand 1978. [DOI: 10.1111/j.1399-6576.1978.tb01381.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jacobsen E, Lunding M, Thorshauge C. [Newer anesthetics, advantages and disadvantages]. Ugeskr Laeger 1978; 140:929-30. [PMID: 653845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Kristensen HS, Lunding M. Two Early Danish Respirators Designed for Prolonged Artificial Ventilation. Acta Anaesthesiol Scand 1978. [DOI: 10.1111/j.1399-6576.1978.tb01363.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bank-Mikkelsen OK, Steiness E, Arnold E, Hansen T, Søbye M, Lunding M. Serum Diazepam and Serum Creatine Kinase after Intra-muscular Injection of Diazepam in Two Different Vehicles. Acta Anaesthesiol Scand 1978. [DOI: 10.1111/j.1399-6576.1978.tb01362.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jessen K, Hansen E, Kratholm S, Lunding M, Ording H, Mogensen JV. [Malignant hyperthermia]. Ugeskr Laeger 1978; 140:95-9. [PMID: 636038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Serafimovski N, Thorball N, Asmussen I, Lunding M. [Poisoning with tricyclic antidepressive agents]. Ugeskr Laeger 1975; 137:1389-93. [PMID: 1170666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Serafimovski N, Thorball N, Asmussen I, Lunding M. Tricyclic antidepressive poisoning with special reference to cardiac complications. Acta Anaesthesiol Scand Suppl 1975; 57:55-63. [PMID: 1061482 DOI: 10.1111/j.1399-6576.1975.tb05413.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Sixty-eight cases of tricyclic antidepressive (TCA) poisoning are discussed. Cardiac arrest occurred in 8 patients, preceded by minor ECG-abnormalities. Five patients died. All cardiac arrests arose within the first 24 h after TCA ingestion. Fifty-seven patients developed ECG-abnormalities, of which 84% began within the first 6 h after TCA ingestion. ECG-abnormalities and other symptoms (respiratory arrest, coma, convulsion and hypotension) often occurred in the same patients. Treatment is described, and cardiac monitoring for at least the first 24 h is recommended. In cases of severe cardiac (ECG) abnormalities, monitoring is recommended until no ECG abnormalities are observed for at least 12 h. In conclusion, the unrestricted use of TCA is cautioned against, since TCA must be regarded as potentially cardiotoxic.
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Sroczynski Z, Lunding M. [Acute respiratory insufficiency following treatment with chlordiazepoxide in patients with delirium tremens]. Ugeskr Laeger 1974; 136:1444-6. [PMID: 4841099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Lunding M, Cooke R, Friis-Hansen B, Lomholt N, Rosen J. [Respirator treatment of the newborn. A review]. Nord Med 1968; 79:609-17. [PMID: 4872514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Friis-Hansen B, Cooke R, Lunding M, Tygstrup I, Yssing M, Zachau-Christiansen B. [Treatment of respiratory insufficiency in the newborn]. Nord Med 1968; 79:618-24. [PMID: 5241691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Lunding M, Rygg IH. Evaluation of the sufficiency of tissue oxygenation during cardio-pulmonary bypass and hypothermia using the RYGG-Kyvsgaard pump oxygenator. Scand J Thorac Cardiovasc Surg 1968; 2:169-78. [PMID: 5732534 DOI: 10.3109/14017436809131900] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Cooke R, Friis-Hansen B, Lunding M. Endotracheal tube fixation and postural drainage in prolonged artificial ventilation of the newborn. Description of a new apparatus. Acta Paediatr Scand 1967; 56:509-12. [PMID: 5233448 DOI: 10.1111/j.1651-2227.1967.tb15415.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Cooke R, Lunding M, Lomholt NF, Yssing M, Zachau-Christiansen B, Früs-Hansen B. Respiratory failure in the newborn. The techniques and results of intermittent positive-pressure ventilation. Z Gesamte Inn Med 1966; 21:498-508. [PMID: 4862258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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