1
|
Watanabe S. Infrared thermography for non-invasive measurement of social inequality aversion in rodents and potential usefulness for future animal-friendly studies. Front Behav Neurosci 2023; 17:1131427. [PMID: 36950066 PMCID: PMC10025391 DOI: 10.3389/fnbeh.2023.1131427] [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] [Received: 12/25/2022] [Accepted: 02/10/2023] [Indexed: 03/08/2023] Open
Abstract
Infrared thermography is a method that detects thermal radiation energy and can measure the body surface temperature of animals from a distance. While rectal temperature has traditionally been used to measure animals' core temperature, thermal imaging can avoid the stress and potential rise of body temperature deriving from handling of the animals. Additionally, being non-invasive and contactless, thermal imaging allows free movement of the animals. The validity of this technique as a psychophysiological method has been proven in a series of stress-induced hyperthermia (SIH) studies of mice under social inequality conditions. Restraint in a holder elicits SIH in mice. A restrained mouse surrounded by freely moving cage mates displays increased SIH suggesting that social inequality enhances the stress. Social inequality can be examined also in unrestrained mice, in particular through unequal distribution of food. In this protocol, a food-deprived mouse is given a small piece of cheese, while its cage mate is given a large piece of cheese. This inequity causes SIH, suggesting social inequality aversion in mice. Thus, social inequality in different situations similarly increased SIH. Importantly, in future studies infrared thermography could also be used to evaluate emotional arousal states different from stress (for example to assess reactivity to rewards or in social and sexual preference tests). Moreover, the technique could be used to investigate also cognitive arousal induced by novelty. Indeed, infrared thermography could be a particularly useful tool for animal-friendly studies of cognition and emotion in rodents.
Collapse
|
2
|
Efficacy and Function of Feathers, Hair, and Glabrous Skin in the Thermoregulation Strategies of Domestic Animals. Animals (Basel) 2021; 11:ani11123472. [PMID: 34944249 PMCID: PMC8697956 DOI: 10.3390/ani11123472] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 12/13/2022] Open
Abstract
Simple Summary Animals adopt several strategies to regulate their body temperature by promoting heat loss or gain in hot and cold environments, respectively. This mechanism of heat loss or production is performed in thermal windows. A thermal window is a structure where many blood capillaries facilitate thermal exchange in this region. The presence of feathers, hair, or glabrous (hairless) skin and their structural characteristics greatly influence each species’ capacity to maintain thermal comfort. This factor needs to be considered when implementing new monitoring or measuring techniques such as infrared thermography since interpretations may vary due to the presence or absence of these structures. It is essential to recognize the effects of glabrous skin, hair, and feathers on thermoregulation to identify species-specific thermal windows that allow accurate evaluations of the thermal state of domestic animals. Abstract The objective of this review is to describe and analyze the effect of feathers, hair, and glabrous (hairless) skin on the thermoregulation of domestic and endotherm animals, especially concerning the uses and scope of infrared thermography (IRT), scientific findings on heat and cold stress, and differences among species of domestic animals. Clinical medicine considers thermoregulation a mechanism that allows animals to adapt to varying thermal environmental conditions, a process in which the presence of feathers, hair, or glabrous skin influences heat loss or heat retention, respectively, under hot and cold environmental conditions. Evaluating body temperature provides vital information on an individual’s physiological state and health status since variations in euthermia maintenance in vertebrates reflect a significant cellular metabolism deviation that needs to be assessed and quantified. IRT is a non-invasive tool for evaluating thermal responses under thermal stress conditions in animals, where the presence or absence of feathers, hair, and glabrous skin can affect readings and the differences detected. Therefore, anatomical regions, the characteristics of feathers, hair, glabrous skin such as structure, length, color, and extension, and strategies for dissipating or retaining heat together constitute a broad area of opportunity for future research into the phenomena of dermal thermoregulation in domestic species.
Collapse
|
3
|
Verduzco-Mendoza A, Bueno-Nava A, Wang D, Martínez-Burnes J, Olmos-Hernández A, Casas A, Domínguez A, Mota-Rojas D. Experimental Applications and Factors Involved in Validating Thermal Windows Using Infrared Thermography to Assess the Health and Thermostability of Laboratory Animals. Animals (Basel) 2021; 11:3448. [PMID: 34944225 PMCID: PMC8698170 DOI: 10.3390/ani11123448] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/25/2021] [Accepted: 12/01/2021] [Indexed: 12/12/2022] Open
Abstract
Evaluating laboratory animals' health and thermostability are fundamental components of all experimental designs. Alterations in either one of these parameters have been shown to trigger physiological changes that can compromise the welfare of the species and the replicability and robustness of the results obtained. Due to the nature and complexity of evaluating and managing the species involved in research protocols, non-invasive tools such as infrared thermography (IRT) have been adopted to quantify these parameters without altering them or inducing stress responses in the animals. IRT technology makes it possible to quantify changes in surface temperatures that are derived from alterations in blood flow that can result from inflammatory, stressful, or pathological processes; changes can be measured in diverse regions, called thermal windows, according to their specific characteristics. The principal body regions that were employed for this purpose in laboratory animals were the orbital zone (regio orbitalis), auricular pavilion (regio auricularis), tail (cauda), and the interscapular area (regio scapularis). However, depending on the species and certain external factors, the sensitivity and specificity of these windows are still subject to controversy due to contradictory results published in the available literature. For these reasons, the objectives of the present review are to discuss the neurophysiological mechanisms involved in vasomotor responses and thermogenesis via BAT in laboratory animals and to evaluate the scientific usefulness of IRT and the thermal windows that are currently used in research involving laboratory animals.
Collapse
Affiliation(s)
- Antonio Verduzco-Mendoza
- PhD Program in Biological and Health Sciences [Doctorado en Ciencias Biológicas y de la Salud], Universidad Autónoma Metropolitana, Mexico City 04960, Mexico;
| | - Antonio Bueno-Nava
- División of Neurosciences, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra, (INR-LGII), Mexico City 14389, Mexico;
| | - Dehua Wang
- School of Life Sciences, Shandong University, Qingdao 266237, China;
| | - Julio Martínez-Burnes
- Animal Health Group, Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Tamaulipas, Victoria City 87000, Mexico;
| | - Adriana Olmos-Hernández
- Division of Biotechnology—Bioterio and Experimental Surgery, Instituto Nacional de Rehabilitación-Luis Guillermo Ibarra Ibarra (INR-LGII), Mexico City 14389, Mexico;
| | - Alejandro Casas
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Xochimilco Campus, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.C.); (A.D.)
| | - Adriana Domínguez
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Xochimilco Campus, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.C.); (A.D.)
| | - Daniel Mota-Rojas
- Neurophysiology, Behavior and Animal Welfare Assessment, DPAA, Xochimilco Campus, Universidad Autónoma Metropolitana (UAM), Mexico City 04960, Mexico; (A.C.); (A.D.)
| |
Collapse
|
4
|
Fu H, Hsu J, Li T, Yeh S, Chen C. Safety assessment of HEA-enriched Cordyceps cicadae mycelia on the central nervous system (CNS), cardiovascular system, and respiratory system in ICR male mice. Food Sci Nutr 2021; 9:4905-4915. [PMID: 34532002 PMCID: PMC8441276 DOI: 10.1002/fsn3.2440] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 06/01/2021] [Accepted: 06/11/2021] [Indexed: 11/06/2022] Open
Abstract
Cordyceps cicadae, an entomopathogenic fungus, is a source of traditional Chinese medicine in China. Due to the low yield of wild C. cicadae, artificial cultivation approaches will be needed to meet the increasing market demand. Using bioreactor culture can increase mass production and the abundance of the active component, N6-(2-hydroxyethyl)-adenosine (HEA). Here, we describe a safety assessment for a novel mycelium preparation method. Many studies have confirmed the safety of C. cicadae mycelia. However, the acute safety pharmacology of the C. cicadae enriched with the high HEA (3.90 mg/g) compound has not been evaluated. This study evaluated the central nervous system (CNS), cardiovascular system, and respiratory system in ICR male mice via oral gavage administration. For each requested item, two batches of eight mice tested on a vehicle (0.5% carboxymethyl cellulose, CMC) and C. cicadae mycelia (1,000 mg/kg) were performed. The heart rate at 60 min for the vehicle and C. cicadae mycelium treatment was 700.3 ± 55.4 and 603.0 ± 42.3 bpm, respectively (p = .4279). For echocardiographic analysis, the LV mass of the vehicle and drug treatment was 86.7 ± 6.4 and 80.2 ± 7.7, respectively (p = .0933). In the respiratory test, the tidal volume of the vehicle and drug treatments was 0.11 ± 0.01 and 0.14 ± 0.01 at 60 min, respectively (p = .4262). These results demonstrate that the oral administration of HEA-enriched C. cicadae mycelia is safe for the CNS, cardiovascular, and respiratory systems.
Collapse
Affiliation(s)
- Hsin‐I Fu
- Biotech Research InstituteGrape King Bio LtdTaoyuan CityTaiwan
| | - Jui‐Hsia Hsu
- Biotech Research InstituteGrape King Bio LtdTaoyuan CityTaiwan
| | - Tsung‐Ju Li
- Biotech Research InstituteGrape King Bio LtdTaoyuan CityTaiwan
| | - Shu‐Hsing Yeh
- Biotech Research InstituteGrape King Bio LtdTaoyuan CityTaiwan
| | - Chin‐Chu Chen
- Biotech Research InstituteGrape King Bio LtdTaoyuan CityTaiwan
- Institute of Food Science and TechnologyNational Taiwan UniversityTaipei CityTaiwan
- Department of Food Science, Nutrition and Nutraceutical BiotechnologyShih Chien UniversityTaipei CityTaiwan
| |
Collapse
|
5
|
Canever JB, Fontanela LC, Hendler KG, Vieceli A, Barbosa RI, Kuriki HU, Aguiar Júnior AS, das Neves LMS, de Cássia Registro Fonseca M, Marcolino AM. Viability of transverse rectus abdominis musculocutaneous flap treated with photobiomodulation and therapeutic ultrasound: an experimental model. Lasers Med Sci 2021; 37:461-470. [PMID: 33725203 DOI: 10.1007/s10103-021-03283-4] [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: 09/30/2020] [Accepted: 03/02/2021] [Indexed: 11/26/2022]
Abstract
Report the effects of photobiomodulation (PBM) and therapeutic ultrasound (TUS) on the viability of TRAM in mice. MATERIALS AND METHODS Fifty-five mice Swiss were subjected to treatment for 5 days. Group 1, treatment was performed with the agents switched off. Groups 2 to 5 were treated with different wavelengths 660 and 830 nanometers (nm) and groups 6 to 11 with TUS of 1 and 3 MHz frequency. Macrometric analyses were performed using a specific camera and analyzed by the ImageJ® software. Thermographic analyses were performed with the Flir C2 and analyzed using the FLIR Tools software. RESULTS Group 9 obtained 95% of viable area on the 3rd day and 85% on the 5th day, showing the effectiveness of the TUS in the flap viability. Regarding skin temperature, there was a difference only in the immediate postoperative period in group 1, which had a lower temperature than the other groups. CONCLUSIONS TUS demonstrated greater efficiency in maintaining the viability of TRAM. PBM 830 nm also demonstrated good results in the viability of TRAM.
Collapse
Affiliation(s)
- Jaquelini Betta Canever
- Laboratory of Assessment and Rehabilitation of the Locomotor Apparatus, Department of Health Sciences, Center Araranguá, Federal University of Santa Catarina, Campus Jardim das Avenidas, Rod. Gov. Jorge Lacerda, 3201, Ararangua, SC, 88906-072, Brazil
| | - Laís Coan Fontanela
- Laboratory of Assessment and Rehabilitation of the Locomotor Apparatus, Department of Health Sciences, Center Araranguá, Federal University of Santa Catarina, Campus Jardim das Avenidas, Rod. Gov. Jorge Lacerda, 3201, Ararangua, SC, 88906-072, Brazil
| | - Ketlyn Germann Hendler
- Postgraduate Program in Rehabilitation Sciences, Federal University of Santa Catarina, Ararangua, SC, Brazil
| | - Aline Vieceli
- Postgraduate Program in Rehabilitation Sciences, Federal University of Santa Catarina, Ararangua, SC, Brazil
| | - Rafael Inácio Barbosa
- Laboratory of Assessment and Rehabilitation of the Locomotor Apparatus, Department of Health Sciences, Center Araranguá, Federal University of Santa Catarina, Campus Jardim das Avenidas, Rod. Gov. Jorge Lacerda, 3201, Ararangua, SC, 88906-072, Brazil
- Postgraduate Program in Rehabilitation Sciences, Federal University of Santa Catarina, Ararangua, SC, Brazil
| | - Heloyse Uliam Kuriki
- Laboratory of Assessment and Rehabilitation of the Locomotor Apparatus, Department of Health Sciences, Center Araranguá, Federal University of Santa Catarina, Campus Jardim das Avenidas, Rod. Gov. Jorge Lacerda, 3201, Ararangua, SC, 88906-072, Brazil
- Postgraduate Program in Rehabilitation Sciences, Federal University of Santa Catarina, Ararangua, SC, Brazil
| | - Aderbal Silva Aguiar Júnior
- Laboratory of Assessment and Rehabilitation of the Locomotor Apparatus, Department of Health Sciences, Center Araranguá, Federal University of Santa Catarina, Campus Jardim das Avenidas, Rod. Gov. Jorge Lacerda, 3201, Ararangua, SC, 88906-072, Brazil
- Postgraduate Program in Rehabilitation Sciences, Federal University of Santa Catarina, Ararangua, SC, Brazil
| | - Laís Mara Siqueira das Neves
- Laboratory of Assessment and Rehabilitation of the Locomotor Apparatus, Department of Health Sciences, Center Araranguá, Federal University of Santa Catarina, Campus Jardim das Avenidas, Rod. Gov. Jorge Lacerda, 3201, Ararangua, SC, 88906-072, Brazil
| | - Marisa de Cássia Registro Fonseca
- Postgraduate Program in Rehabilitation and Functional Performance of the Department of Health Sciences, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirao Preto, SP, Brazil
| | - Alexandre Marcio Marcolino
- Laboratory of Assessment and Rehabilitation of the Locomotor Apparatus, Department of Health Sciences, Center Araranguá, Federal University of Santa Catarina, Campus Jardim das Avenidas, Rod. Gov. Jorge Lacerda, 3201, Ararangua, SC, 88906-072, Brazil.
- Postgraduate Program in Rehabilitation Sciences, Federal University of Santa Catarina, Ararangua, SC, Brazil.
| |
Collapse
|
6
|
van der Vinne V, Pothecary CA, Wilcox SL, McKillop LE, Benson LA, Kolpakova J, Tam SKE, Krone LB, Fisk AS, Wilson TS, Yamagata T, Cantley J, Vyazovskiy VV, Peirson SN. Continuous and non-invasive thermography of mouse skin accurately describes core body temperature patterns, but not absolute core temperature. Sci Rep 2020; 10:20680. [PMID: 33244132 PMCID: PMC7693264 DOI: 10.1038/s41598-020-77786-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 11/13/2020] [Indexed: 11/09/2022] Open
Abstract
Body temperature is an important physiological parameter in many studies of laboratory mice. Continuous assessment of body temperature has traditionally required surgical implantation of a telemeter, but this invasive procedure adversely impacts animal welfare. Near-infrared thermography provides a non-invasive alternative by continuously measuring the highest temperature on the outside of the body (Tskin), but the reliability of these recordings as a proxy for continuous core body temperature (Tcore) measurements has not been assessed. Here, Tcore (30 s resolution) and Tskin (1 s resolution) were continuously measured for three days in mice exposed to ad libitum and restricted feeding conditions. We subsequently developed an algorithm that optimised the reliability of a Tskin-derived estimate of Tcore. This identified the average of the maximum Tskin per minute over a 30-min interval as the optimal way to estimate Tcore. Subsequent validation analyses did however demonstrate that this Tskin-derived proxy did not provide a reliable estimate of the absolute Tcore due to the high between-animal variability in the relationship between Tskin and Tcore. Conversely, validation showed that Tskin-derived estimates of Tcore reliably describe temporal patterns in physiologically-relevant Tcore changes and provide an excellent measure to perform within-animal comparisons of relative changes in Tcore.
Collapse
Affiliation(s)
- Vincent van der Vinne
- Department of Physiology and Genetics, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK. .,Department of Biology, Williams College, Williamstown, MA, USA.
| | - Carina A Pothecary
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Sian L Wilcox
- Department of Physiology and Genetics, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Laura E McKillop
- Department of Physiology and Genetics, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Lindsay A Benson
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Jenya Kolpakova
- Department of Neurobiology, Brudnick Neuropsychiatric Research Institute, University of Massachusetts Medical School, Worcester, MA, USA
| | - Shu K E Tam
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Lukas B Krone
- Department of Physiology and Genetics, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Angus S Fisk
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Tatiana S Wilson
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Tomoko Yamagata
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - James Cantley
- Division of Systems Medicine, School of Medicine, University of Dundee, Dundee, UK
| | - Vladyslav V Vyazovskiy
- Department of Physiology and Genetics, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK
| | - Stuart N Peirson
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neurosciences Institute, University of Oxford, Oxford, UK.
| |
Collapse
|
7
|
Faraji J, Metz GAS. Infrared Thermography Reveals Sex-Specific Responses to Stress in Mice. Front Behav Neurosci 2020; 14:79. [PMID: 32523518 PMCID: PMC7261839 DOI: 10.3389/fnbeh.2020.00079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/28/2020] [Indexed: 01/20/2023] Open
Abstract
Psychogenic hyperthermia is a stress-related condition reported mostly in women. Neuroendocrine responses to stress in females differ from those in males, and these differences cannot be explained solely based on hypothalamic-pituitary-adrenal (HPA) axis activity. Here, we used infrared (IR) thermographic imaging to record changes in cutaneous temperature following two types of stressful experiences in female and male mice. Mice were exposed to either single-session restraint stress or vertical exploration (rearing) deprivation and were monitored for exploratory activity and IR surface thermal changes. Females displayed higher rearing activity than males during the dark phase of the light cycle. Both sexes showed similar plasma corticosterone (CORT) responses after a challenge with restraint and rearing deprivation. However, only females responded to rearing deprivation with increased cutaneous temperature in the head and back, and a reduced thermal response in the tail. Circulating CORT levels were not correlated with the thermal variations. These findings, for the first time, provide evidence for sex-specific cutaneous thermal responses to short-term stress in mice following transient vertical-activity deprivation that may mimic clinical psychogenic hyperthermia.
Collapse
Affiliation(s)
- Jamshid Faraji
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB, Canada.,Faculty of Nursing & Midwifery, Golestan University of Medical Sciences, Gorgan, Iran
| | - Gerlinde A S Metz
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB, Canada
| |
Collapse
|
8
|
Farrar KL, Field AE, Norris SL, Jacobsen KO. Comparison of Rectal and Infrared Thermometry Temperatures in Anesthetized Swine ( Sus scrofa). JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2020; 59:221-225. [PMID: 32075698 DOI: 10.30802/aalas-jaalas-19-000119] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Infrared thermometry (IRTM) is a noncontact method to measure temperature. The purpose of this study was to compare rectal temperature and IRTM in healthy anesthetized swine, with the hypothesis that IRTM would be an accurate, noninvasive alternative for rectal temperature measurement. Two groups of female Yorkshire-cross swine (n = 14 and n = 12) were sedated with Tiletamine-zolazepam (0.5 mg/kg) for blood collection during a routine physical examination. While sedated, rectal temperatures were measured using a SureTemp Plus 690 (Welch Allyn) and IRTM measurements were taken using a FLIR E5 thermal imaging camera. The 2 anatomic sites used for thermography measurements were the area surrounding the eye and the neck at the base of the ear. The distance from the imaging camera and the animal during IRTM measurements was 24 to 32 inches, a distance that would allow camera access in a standard swine enclosure. The infrared imaging camera's surface temperature measurement exhibited a proportional bias when compared with the rectal temperature. All rectal temperature measurements were between 98.7 °F to 101.3 °F, with a mean temperature of 100.4 °F. IRTM tended to underestimate rectal temperatures at lower values, and overestimate rectal temperatures at higher values by approximately (+) or (-) 0.8 °F of rectal temperature. Infrared thermometry can provide a quick noninvasive assessment of the body surface temperature, without the need for animal handling or restraint, but should not be considered an accurate replacement for rectal temperature measurement.
Collapse
Affiliation(s)
- Kerrie L Farrar
- Veterinary Medicine Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland
| | - Amy E Field
- Research Support Division, US Army Institute of Surgical Research, JBSA Fort Sam Houston, Texas
| | - Sarah L Norris
- Statistics Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland
| | - Kenneth O Jacobsen
- Veterinary Medicine Division, United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland
| |
Collapse
|
9
|
Motamarry A, Negussie AH, Rossmann C, Small J, Wolfe AM, Wood BJ, Haemmerich D. Real-time fluorescence imaging for visualization and drug uptake prediction during drug delivery by thermosensitive liposomes. Int J Hyperthermia 2020; 36:817-826. [PMID: 31451077 DOI: 10.1080/02656736.2019.1642521] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Objective: Thermosensitive liposomal doxorubicin (TSL-Dox) is a promising stimuli-responsive nanoparticle drug delivery system that rapidly releases the contained drug in response to hyperthermia (HT) (>40 °C). Combined with localized heating, TSL-Dox allows highly localized delivery. The goals of this study were to demonstrate that real-time fluorescence imaging can visualize drug uptake during delivery, and can predict tumor drug uptake. Methods: Nude mice carrying subcutaneous tumors (Lewis lung carcinoma) were anesthetized and injected with TSL-Dox (5 mg/kg dose). Localized HT was induced by heating tumors for 15, 30 or 60 min via a custom-designed HT probe placed superficially at the tumor location. In vivo fluorescence imaging (excitation 523 nm, emission 610 nm) was performed before, during, and for 5 min following HT. After imaging, tumors were extracted, drug uptake was quantified by high-performance liquid chromatography, and correlated with in vivo fluorescence. Plasma samples were obtained before and after HT to measure TSL-Dox pharmacokinetics. Results: Local drug uptake could be visualized in real-time during HT. Compared to unheated control tumors, fluorescence of heated tumors increased by 4.6-fold (15 min HT), 9.3-fold (30 min HT), and 13.2-fold (60 min HT). HT duration predicted tumor drug uptake (p = .02), with tumor drug concentrations of 4.2 ± 1.3 µg/g (no HT), 7.1 ± 5.9 µg/g (15 min HT), 14.1 ± 6.7 µg/g (30 min HT) and 21.4 ± 12.6 µg/g (60 min HT). There was good correlation (R2 = 0.67) between fluorescence of the tumor region and tumor drug uptake. Conclusions: Real-time in vivo fluorescence imaging can visualize drug uptake during delivery, and can predict tumor drug uptake.
Collapse
Affiliation(s)
- Anjan Motamarry
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina , Charleston , SC , USA.,Department of Pediatrics, Medical University of South Carolina , Charleston , SC , USA
| | - Ayele H Negussie
- Center for Interventional Oncology, Radiology and Imaging Sciences, Clinical Center, National Institutes of Health , Bethesda , MD , USA
| | - Christian Rossmann
- Department of Pediatrics, Medical University of South Carolina , Charleston , SC , USA
| | - James Small
- Department of Public Health Sciences, Medical University of South Carolina , Charleston , SC , USA
| | - A Marissa Wolfe
- Department of Comparative Medicine, Medical University of South Carolina , Charleston , SC , USA
| | - Bradford J Wood
- Center for Interventional Oncology, Radiology and Imaging Sciences, Clinical Center, National Institutes of Health , Bethesda , MD , USA
| | - Dieter Haemmerich
- Department of Pediatrics, Medical University of South Carolina , Charleston , SC , USA.,Department of Bioengineering, Clemson University , Clemson , SC , USA
| |
Collapse
|