The lymphatic vessels can be selectively stimulated to grow in adult mice, rats and pigs by application of viral vectors expressing the lymphangiogenic factors VEGF-C or VEGF-D. Vice versa, lymphangiogenesis in various pathological settings can be inhibited by the blocking of the VEGF-C/VEGFR3 interaction using a ligand-binding soluble form of VEGFR3. Furthermore, the recently discovered plasticity of meningeal and lacteal lymphatic vessels provides novel opportunities for their manipulation in disease. Adenoviral and adeno-associated viral vectors (AAVs) provide suitable tools for establishing short- and long-term gene expression, respectively and adenoviral vectors have already been used in clinical trials. As an example, we describe here ways to manipulate the meningeal lymphatic vasculature in the adult mice via AAV-mediated gene delivery. The possibility of stimulation and inhibition of lymphangiogenesis in adult mice has enabled the analysis of the role and function of lymphatic vessels in mouse models of disease.
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http://dx.doi.org/10.1007/978-1-4939-8712-2_19 | DOI Listing |
Lymphat Res Biol
January 2025
Department of Plastic and Reconstructive, Aesthetic Surgery, Toyama University Hospital, Toyama, Japan.
We report the usefulness of a tapered cutting needle, which has a polyhedral tip similar to that of a square needle and transitions to a round tip in the middle, for super-microsurgery. We have performed more than 500 lymphaticovenular anastomoses (LVAs) using tapered cutting needles. Therefore, we investigated the caliber of the anastomosed lymphatic vessels and veins, characteristics of the lymphatic vessels, the time required to perform the anastomosis, damage to the lymphatic vessels and veins during anastomosis, and patency of 30 recently performed consecutive anastomoses.
View Article and Find Full Text PDFJ Vet Diagn Invest
January 2025
Brookfield Zoo Chicago, Brookfield, IL, USA.
Bacteria in the complex and nontuberculous mycobacteria may affect a variety of animal species under human care and pose public health risks as zoonotic pathogens. A case of sudden onset of lethargy and increased respiratory effort in a 5-y-old, intact female reindeer () under managed care had progressed to severe dyspnea despite aggressive treatment. The animal was euthanized due to poor prognosis.
View Article and Find Full Text PDFSci Rep
January 2025
Wallace H. Coulter Department of Biomedical Engineering, Emory University and Georgia Institute of Technology, Atlanta, GA, USA.
The lymphatic system plays complex, often contradictory, roles in many cancers, including melanoma; these roles include contributions to tumor cell metastasis and immunosuppression in the tumor microenvironment as well as generation of antitumor immunity. Advancing our understanding of lymphatic vessel involvement in regulating tumor growth and immune response may provide new therapeutic targets or treatment plans to enhance the efficacy of existing therapies. We utilized a syngeneic murine melanoma model in which we surgically disrupted the lymphatic vessel network draining from the tumor to the tumor-draining lymph node (TDLN) while leaving the TDLN intact.
View Article and Find Full Text PDFActa Bioeng Biomech
June 2024
4Department of Pediatric Dentistry and Preclinical Dentistry, Wroclaw Medical University, Wrocław, Poland.
: Caries or iatrogenic thermal trauma of the teeth have a significant impact on the dental pulp structure connected with stimulation of angiogenesis and lymphangiogenesis. Therefore, the aim of the study was to identify the difference in the rate of heat dissipation by vessels present in the dental pulp. : Freshly extracted healthy ( = 10) and carious ( = 14) molars and premolars were cut on a diamond saw and subjected to active thermographic examination and then subjected to lymphoscintigraphy and X-ray examination.
View Article and Find Full Text PDFJCI Insight
January 2025
Hamon Center for Therapeutic Oncology Research, UT Southwestern Medical Center, Dallas, United States of America.
Somatic activating mutations in KRAS can cause complex lymphatic anomalies (CLAs). However, the specific processes that drive KRAS-mediated CLAs have yet to be fully elucidated. Here, we used single-cell RNA sequencing to construct an atlas of normal and KrasG12D-malformed lymphatic vessels.
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