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Journal of the American Association for Laboratory Animal Science: JAALAS

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https://www.readbyqxmd.com/read/28211314/procedure-for-horizontal-transfer-of-patient-derived-xenograft-tumors-to-eliminate-corynebacterium-bovis
#1
Christopher A Manuel Stacey M Bagby Julie A Reisinger Umarani Pugazhenthi Todd M Pitts Stephen B Keysar John J Arcaroli And Jori K Leszczynski
Human patient-derived xenograft (PDX) tumors, propagated in immunodeficient mice, are rapidly growing in use as amodelfor cancer research. Horizontal transfer between mice, without in vitro cell culture, allows these tumors to retainmany of their unique characteristics from their individual patient of origin. However, the immunodeficient mouse strainsused to grow these tumors are susceptible to numerous opportunistic pathogens, including Corynebacterium bovis. At ourinstitution, 2 in vivo tumor banks of PDX tumors had been maintained within nude mouse colonies enzootically infectedwith C...
February 16, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28211313/detection-and-elimination-of-corynebacterium-bovis-from-barrier-rooms-by-using-an-environmental-sampling-surveillance-program
#2
Christopher A Manuel Umarani Pugazhenthi Shannon P Spiegel And Jori K Leszczynski
Rodent health-monitoring programs based on sampling an IVC system's exhaust air dust (EAD) has enhanced and evenreplaced traditional sentinels for some rodent pathogens. EAD testing by qPCR assay is an optimal surveillance methodfor the rapid detection of Corynebacterium bovis-infected immunodeficient mice. Here we demonstrate that an active EADsurveillance program for C. bovis can be used to maintain nude mice C. bovis-free after the transition from historically enzootically infected colonies. During 3 events over 3 y, rapid detection of infection, elimination of infected mice, aggressivequarantine measures, and local decontamination prevented the spread of C...
February 16, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28211310/morphologic-and-doppler-findings-from-hepatic-ultrasonography-of-normal-cynomolgus-monkeys-macaca-fascicularis
#3
Kyo Won Lee Chan Woo Cho Ji Eun Lee Hyojun Park Gyu-Seong Choi Woo Kyoung Jeong Jae Berm Park And Sungjoo Kim
The present study evaluated the anatomic and ultrasonographic features of the liver in normal cynomolgus monkeys (Macacafascicularis). Healthy, male, cynomolgus monkeys from Cambodia (n = 25; mean age, 58.1 mo) were sedated with ketamine (7mg/kg) and examined by using 2D and Doppler ultrasonography. We measured the diameters of the vascular structures and bile duct, determined the velocities of the hepatic artery and portal vein, and calculated the resistance index of the hepatic artery. Vessel diameters were: proper hepatic artery, 1...
February 16, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28195033/techniques-for-nonterminal-blood-sampling-in-black-tailed-prairie-dogs-cynomys-ludovicianus
#4
Valerie Head David Eshar And Melissa R Nau
Black-tailed prairie dogs (Cynomys ludovicianus) are used as an animal model for research on gallbladder stones and several infectious diseases. A comprehensive, instructive resource regarding the appropriate techniques for venipuncture and collection of nonterminal blood samples in this species has not yet been published. Blood samples (1 mL or larger) were readily obtained from the jugular vein, femoral vein, or cranial vena cava, whereas peripheral sites, such as the cephalic vein, saphenous vein, and tarsal vein, mainly were useful for obtaining smaller volumes...
February 13, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28188706/comparison-of-atipamezole-with-yohimbine-for-antagonism-of-xylazine-in-mice-anesthetized-with-ketamine-and-xylazine
#5
Christopher F Janssen Pauline Maiello M Jerry Wright Jr Kara B Kracinovsky And Joseph T Newsome
The α2 adrenergic agonist xylazine produces a sedative effect and is typically combined with ketamine and used for anesthesia or chemical restraint of laboratory mice. Xylazine's sedative effect-and its undesirable side effects of bradycardia, hypotension, and poor tissue perfusion-can be reversed by administration of α2 antagonists, such as atipamezole or yohimbine. Although atipamezole and yohimbine dosing guidelines are available for mice, no controlled comparison has been performed to guide the lab animal community in the selection of one over the other...
February 10, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28185613/development-of-quantitative-real-time-pcr-assays-for-postmortem-detection-of-mycobacterium-spp-common-in-zebrafish-danio-rerio-research-colonies
#6
Danielle M Meritet Donna M Mulrooney Michael L Kent And Christiane V Löhr
Mycobacterium spp. infections are common in zebrafish kept in research facilities. These comorbidities can substantiallymodulate the responses of these fish to external and internal stimuli. Therefore, diagnostic tests to detect Mycobacterium spp.infections in zebrafish colonies prove essential. Here, we outline the development of quantitative simplex real-time PCRassays to detect the 3 Mycobacterium species most commonly identified in laboratory zebrafish. The assays targeted the heatshock protein 65 gene of M...
February 9, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28185611/retrospective-analysis-of-reproductive-performance-of-pair-bred-compared-with-trio-bred-mice
#7
Katherine Wasson
Federal guidelines provide recommendations regarding the minimum of floor space that should be allotted for breedinglaboratory rodents. Mouse mating systems used by a variety of institutions frequently deviate from these recommendations.Regulatory agencies suggest that deviations from established guidelines should be assessed on an institutional basis andrecommend periodic review by the local IACUC. Mouse breeding data, collected in a laboratory animal management softwareprogram at a single institution, were retrospectively analyzed to determine the effects of 2 breeding schemes on reproductiveperformance...
February 9, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28155805/effects-of-buprenorphine-methylnaltrexone-and-their-combination-on-gastrointestinal-transit-in-healthy-new-zealand-white-rabbits
#8
Manuel Martin-Flores Bhupinder Singh Courtney A Walsh Elizabeth P Brooks Laci C Taylor And Lisa M Mitchell
Among the many analgesic agents available, buprenorphine appears to be the analgesic used most often in rabbits. Unfortunately,deleterious side effects of opioids, such as gastrointestinal stasis and anorexia, may discourage the use of these agents.Methylnaltrexone is a peripheral opioid antagonist that ameliorates opioid-induced gastrointestinal stasis in others species yet preserves the analgesic effects of buprenorphine. We evaluated whether methylnaltrexone reversed buprenorphine-inducedgastrointestinal stasis in 8 healthy male New Zealand White rabbits...
February 2, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28074740/what-goes-around-can-come-around-an-unexpected-deleterious-effect-of-using-mouse-running-wheels-for-environmental-enrichment
#9
Renee Y
Environmental enrichment items such as running wheels can promote the wellbeing of laboratory mice. Growing evidencesuggests that wheel running simulates exercise effects in many mouse models of human conditions, but this activityalso might change other aspects of mouse behavior. In this case study, we show that the presence of running wheels leadsto pronounced and permanent circling behavior with route-tracing in a proportion of the male mice of a genetically distinctcohort. The genetic background of this cohort includes a mutation in Arhgap19, but genetic crosses showed that an unknownsecond-site mutation likely caused the induced circling behavior...
January 10, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931327/aclam-position-statement-on-adequate-veterinary-care
#10
(no author information available yet)
No abstract text is available yet for this article.
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931326/aclam-position-statement-on-reproducibility
#11
(no author information available yet)
No abstract text is available yet for this article.
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931325/aclam-position-statement-on-rodent-surgery
#12
(no author information available yet)
No abstract text is available yet for this article.
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931324/aclam-position-statement-on-pain-and-distress-in-research-animals
#13
(no author information available yet)
No abstract text is available yet for this article.
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931323/lidocaine-hydrochloride-compared-with-ms222-for-the-euthanasia-of-zebrafish-danio-rerio
#14
Chereen Collymore, E Kate Banks, Patricia V Turner
Despite several shortcomings, MS222 is the most commonly used chemical agent for euthanasia of zebrafish. Although lidocaine hydrochloride has some advantages over MS222, its effectiveness as a euthanasia agent for zebrafish is unknown. Larvae at 9 to 16 d postfertilization were exposed to 250 mg/L MS222 or 400, 500, 600, 700, 800, 900, or 1000 mg/L lidocaine and observed for cessation of heartbeat. Adult zebrafish were exposed to 250 mg/L MS222 or 400, 500, or 600 mg/L lidocaine; times to loss of righting reflex, cessation of opercular movement, and complete recovery; body length; aversive behavior; and gross and microscopic evidence of acute toxicity were evaluated...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931322/interstrain-differences-in-co2-induced-pulmonary-hemorrhage-in-mice
#15
Suhrim Fisher, Winona L Burgess, Kenneth D Hines, Gary L Mason, James R Owiny
Carbon dioxide is the most commonly used gas for euthanasia of rodents. The current AVMA Guidelines recommend slowly filling the container with CO2 (SF) and now indicate that the practice of placing conscious animals in containers prefilled with CO2 (PF) is unacceptable. An investigator noted pulmonary hemorrhage (PH) in BALB/c mice euthanized by SF that was not observed after PF. Here we evaluated whether the air-displacement rate (SF compared with PF) influenced the development of PH or nasal hemorrhage (NH) in 2 commonly used mouse strains...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931321/evaluation-of-mice-undergoing-serial-oral-gavage-while-awake-or-anesthetized
#16
Carissa P Jones, Kelli L Boyd, Jeanne M Wallace
Although oral gavage is the most straightforward approach to achieve precise enteric administration in rodents, it is associated with potential adverse consequences. Here we compare the effects of serial oral gavage in awake compared with anesthetized mice. Female C57BL/6J mice (n = 20 per group) were assigned to 1 of 3 treatment groups (control, awake gavage, or anesthetized gavage) and gavaged daily with 0.2 mL of saline (with no manipulation on weekends) for a total of 18 treatment days. Body weight and clinical appearance were monitored throughout the treatment period, after which mice were euthanized and necropsied...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931320/constant-rate-infusion-of-dexmedetomidine-to-manage-thiopental-anesthesia-during-intracranial-surgery-in-cynomolgus-macaques-macaca-fascicularis
#17
Noemi Romagnoli, Alessandra Buonacucina, Carlotta Lambertini, Domenico Ventrella, Angelo Peli
Macaques (Macaca spp.) are often used as animal models in biomedical research involving a neurosurgical approach. The development of new anesthetic techniques is pivotal for these studies. Studies in human anesthesia for intracranial surgery have shown that dexmedetomidine infusion reduces the incidence of cardiocirculatory complications in the perioperative period, reduces the need for supplemental analgesia, and provides an analgesic effect analogous to that of remifentanil. Data regarding the anesthetic effects of dexmedetomidine infusion in NHP including Macaca spp...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931319/subcutaneous-compared-with-intraperitoneal-ketaminexylazine-for-anesthesia-of-mice
#18
Maya Levin-Arama, Lital Abraham, Trevor Waner, Alon Harmelin, David M Steinberg, Tal Lahav, Mickey Harlev
Mice are commonly anesthetized intraperitoneally with a ketamine-xylazine (KX) solution. Although this route of administration allows rapid uptake of the injected drugs, its disadvantages and potential risks include pain, peritoneal irritation, and perforation of an abdominal organ; some of the risks depend on the operator's experience. We compared the efficacy of intraperitoneal and subcutaneous administration of KX in HSD:ICR, BALB/cOlaHsd, and C57BL/6JOlaHsd mice in terms of time to onset and duration of surgical anesthesia, procedure safety, and mortality...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931318/pharmacokinetics-and-paw-withdrawal-pressure-in-female-guinea-pigs-cavia-porcellus-treated-with-sustained-release-buprenorphine-and-buprenorphine-hydrochloride
#19
Brian J Smith, Daniel J Wegenast, Ryan J Hansen, Ann M Hess, Lon V Kendall
Providing appropriate analgesia is essential in minimizing pain and maintaining optimal animal care and welfare in laboratory animals. Guinea pigs are common animal models in biomedical research, often requiring analgesic support. Here we evaluated the pharmacokinetics and efficacy of a sustained-release formulation of buprenorphine (Bup-SR) in this species. Guinea pigs (n = 7 each group) received either Bup-HCl (0.05 mg/kg BID for 3 d) or Bup-SR (0.3 mg/kg once). Plasma collection and measurement of paw-withdrawal pressure (PWP) was conducted at 0, 1, 3, 6, 12, 26, 48, and 72 h after treatment...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/27931317/influence-of-rack-design-and-disease-prevalence-on-detection-of-rodent-pathogens-in-exhaust-debris-samples-from-individually-ventilated-caging-systems
#20
Beth A Bauer, Cynthia Besch-Williford, Robert S Livingston, Marcus J Crim, Lela K Riley, Matthew H Myles
Sampling of bedding debris within the exhaust systems of ventilated racks may be a mechanism for detecting murine pathogens in colony animals. This study examined the effectiveness of detecting pathogens by PCR analysis of exhaust debris samples collected from ventilated racks of 2 different rack designs, one with unfiltered air flow from within the cage to the air-exhaust pathway, and the other had a filter between the cage and the air-exhaust pathway. For 12 wk, racks were populated with either 1 or 5 cages of mice (3 mice per cage) infected with one of the following pathogens: mouse norovirus (MNV), mouse parvovirus (MPV), mouse hepatitis virus (MHV), Helicobacter spp...
November 2016: Journal of the American Association for Laboratory Animal Science: JAALAS
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