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Janardhan HP, Wachter BT, Trivedi CM. Lymphatic System Development and Function. Curr Cardiol Rep 2024:10.1007/s11886-024-02120-8. [PMID: 39172295 DOI: 10.1007/s11886-024-02120-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/13/2024] [Indexed: 08/23/2024]
Abstract
PURPOSE OF REVIEW This review delves into recent advancements in understanding generalized and organ-specific lymphatic development. It emphasizes the distinct characteristics and critical anomalies that can impair lymphatic function. By exploring developmental mechanisms, the review seeks to illuminate the profound impact of lymphatic malformations on overall health and disease progression. RECENT FINDINGS The introduction of genome sequencing, single-cell transcriptomic analysis, and advanced imaging technologies has significantly enhanced our ability to identify and characterize developmental defects within the lymphatic system. As a result, a wide range of lymphatic anomalies have been uncovered, spanning from congenital abnormalities present at birth to conditions that can become life-threatening in adulthood. Additionally, recent research highlights the heterogeneity of lymphatics, revealing organ-specific developmental pathways, unique molecular markers, and specialized physiological functions specific to each organ. A deeper understanding of the unique characteristics of lymphatic cell populations in an organ-specific context is essential for guiding future research into lymphatic disease processes. An integrated approach to translational research could revolutionize personalized medicine, where treatments are precisely tailored to individual lymphatic profiles, enhancing effectiveness and minimizing side effects.
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Affiliation(s)
- Harish P Janardhan
- Division of Cardiovascular Medicine, UMass Chan Medical School, Worcester, MA, 01605, USA
- Department of Medicine, UMass Chan Medical School, Worcester, MA, 01605, USA
| | - Brianna T Wachter
- Division of Cardiovascular Medicine, UMass Chan Medical School, Worcester, MA, 01605, USA
- Department of Medicine, UMass Chan Medical School, Worcester, MA, 01605, USA
- MD-PhD Program, Morningside Graduate School of Biomedical Sciences, UMass Chan Medical School, Worcester, MA, 01605, USA
| | - Chinmay M Trivedi
- Division of Cardiovascular Medicine, UMass Chan Medical School, Worcester, MA, 01605, USA.
- Department of Medicine, UMass Chan Medical School, Worcester, MA, 01605, USA.
- MD-PhD Program, Morningside Graduate School of Biomedical Sciences, UMass Chan Medical School, Worcester, MA, 01605, USA.
- Department of Molecular, Cell, and Cancer Biology, UMass Chan Medical School, Worcester, MA, 01605, USA.
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Suzuki-Inoue K, Tsukiji N. A role of platelet C-type lectin-like receptor-2 and its ligand podoplanin in vascular biology. Curr Opin Hematol 2024; 31:130-139. [PMID: 38359177 DOI: 10.1097/moh.0000000000000805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
PURPOSE OF REVIEW Platelets are essential for hemostasis and are also vital in lymphatic and lung development and the maintenance of vascular integrity. Platelet activation receptor C-type lectin-like receptor 2 (CLEC-2) and its endogenous ligand podoplanin (PDPN) in lymphatic endothelial cells (LECs) and other cells regulate these processes. This review aims to comprehensively summarize the roles of platelet CLEC-2 and PDPN. This review also focuses on discussing the underlying mechanisms by which platelet CLEC-2 and PDPN mediate blood/lymphatic separation. FINDINGS CLEC-2/PDPN-induced platelet activation in the primary lymph sacs, developmental lymphovenous junctions, neonatal mesentery, and the site of tumor lymphangiogenesis prevents blood/lymphatic vessel misconnection. Further, CLEC-2/PDPN-induced platelet activation is essential for lung development. Mice deficient in CLEC-2 or PDPN show blood-filled lymphatics, lung malformations, and cerebrovascular abnormalities. CLEC-2 deletion in steady-state adult mice did not result in blood/lymphatic vessel mixing. In adulthood, CLEC-2 maintains vascular integrity and that of high endothelial venules in lymph nodes. CLEC-2 deletion in adulthood results in hemorrhage under inflammatory conditions, and hemolymph nodes. SUMMARY The platelet CLEC-2/LEC PDPN interaction prevents blood/lymphatic vessel mixing at active remodeling sites of the blood/lymphatic system, but not in steady-state adult mice. This interaction also regulates vascular integrity when vascular permeability increases before and after birth.
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Affiliation(s)
- Katsue Suzuki-Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
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Moazzam S, O'Hagan LA, Clarke AR, Itkin M, Phillips ARJ, Windsor JA, Mirjalili SA. The cisterna chyli: a systematic review of definition, prevalence, and anatomy. Am J Physiol Heart Circ Physiol 2022; 323:H1010-H1018. [PMID: 36206050 DOI: 10.1152/ajpheart.00375.2022] [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] [Indexed: 12/14/2022]
Abstract
The cisterna chyli is a lymphatic structure found at the caudal end of the thoracic duct that receives lymph draining from the abdominal and pelvic viscera and lower limbs. In addition to being an important landmark in retroperitoneal surgery, it is the key gateway for interventional radiology procedures targeting the thoracic duct. A detailed understanding of its anatomy is required to facilitate more accurate intervention, but an exhaustive summary is lacking. A systematic review was conducted, and 49 published human studies met the inclusion criteria. Studies included both healthy volunteers and patients and were not restricted by language or date. The detectability of the cisterna chyli is highly variable, ranging from 1.7 to 98%, depending on the study method and criteria used. Its anatomy is variable in terms of location (vertebral level of T10 to L3), size (ranging 2-32 mm in maximum diameter and 13-80 mm in maximum length), morphology, and tributaries. The size of the cisterna chyli increases in some disease states, though its utility as a marker of disease is uncertain. The anatomy of the cisterna chyli is highly variable, and it appears to increase in size in some disease states. The lack of well-defined criteria for the structure and the wide variation in reported detection rates prevent accurate estimation of its natural prevalence in humans.
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Affiliation(s)
- Sara Moazzam
- School of Medicine, The University of Auckland, Auckland, New Zealand
| | - Lomani A O'Hagan
- School of Medicine, The University of Auckland, Auckland, New Zealand
| | - Alys R Clarke
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
| | - Maxim Itkin
- Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Anthony R J Phillips
- Applied Surgery and Metabolism Laboratory, School of Biological Sciences, The University of Auckland, Auckland, New Zealand
| | - John A Windsor
- Surgical and Translational Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - S Ali Mirjalili
- Department of Anatomy and Medical Imaging, The University of Auckland, Auckland, New Zealand
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Zhang ML, Guo LM, Li PC, Zhang JK, Guo CX. An effective method to reduce lymphatic drainage post-lateral cervical lymph node dissection of differentiated thyroid cancer: a retrospective analysis. World J Surg Oncol 2022; 20:294. [PMID: 36104741 PMCID: PMC9472435 DOI: 10.1186/s12957-022-02759-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 08/27/2022] [Indexed: 11/10/2022] Open
Abstract
Background Lymph or chyle leak (LL/CL) is severe complications after lateral cervical lymph node dissection (LLND), mainly due to iatrogenic injury of the lymphatic duct. Efficient and well-operated methods to reduce postoperative drainage are still lacking. This was a feasibility study to evaluate a new method of preventing LL/CL compared to conventional treatment. Method We retrospectively analyzed 20 consecutive patients who used the “pedicled omohyoid flap covering (POFC)” method during LLND from January 2019 to December 2021 in our center as an observation group. Another 20 consecutive patients used the conventional method during LLND in this period as a control group. The clinical and pathological features of the two groups were compared, and the related factors that affected postoperative lymphatic drainage were analyzed with Cox proportional hazards models. Results The drainage volume per 24 h and the incidence of LL/CL in the control group were both higher than that in the observation group (all P < 0.05), and the number of lymph nodes dissected in the IV region > 10 and the use of the POFC method were the independent risk factors that significantly affected the incidence of LL/CL post LLND (all P < 0.05). Conclusions POFC is a safe and useful method for reducing drainage and preventing LL/CL post-LLND, especially for patients with heavy metastasis of the lymph nodes in the IV region.
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Hinton LR, O'Hagan LA, Griffiths AP, Clark AR, Phillips ARJ, Windsor JA, Mirjalili SA. The effect of respiration and body position on terminal thoracic duct diameter and the lymphovenous junction: An exploratory ultrasound study. Clin Anat 2021; 35:447-453. [PMID: 34658062 DOI: 10.1002/ca.23801] [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: 06/20/2021] [Revised: 10/10/2021] [Accepted: 10/11/2021] [Indexed: 11/10/2022]
Abstract
The thoracic duct (TD) drains most of the body's lymph back to the venous system via its lymphovenous junction (LVJ), playing a pivotal role in fluid homeostasis, fat absorption and the systemic immune response. The respiratory cycle is thought to assist with lymph flow, but the precise mechanism underpinning terminal TD lymph flow into the central veins is not well understood. The aim of this study was to use ultrasonography (US) to explore the relationship between terminal TD lymph flow, the respiratory cycle, and gravity. The left supraclavicular fossa was scanned in healthy non-fasted volunteers using high-resolution (13-5 MHz) US to identify the terminal TD and the presence of a lymphovenous valve (LVV). The TD's internal diameter was measured in relation to respiration (inspiration vs. expiration) and body positioning (supine vs. Trendelenburg). The terminal TD was visualized in 20/33 (61%) healthy volunteers. An LVV was visualized in only 4/20 (20%) cases. The mean terminal TD diameter in the supine position was 1.7 mm (range 0.8-3.1 mm); this increased in full inspiration (mean 1.8 mm, range 0.9-3.2 mm, p < 0.05), and in the Trendelenburg position (mean 1.8 mm, range 1.2-3.1 mm, p < 0.05). The smallest mean terminal TD diameter occurred in full expiration (1.6 mm, range 0.7-3.1 mm, p < 0.05). Respiration and gravity impact the terminal TD diameter. Due to the challenges of visualizing the TD and LVJ, other techniques such as dynamic magnetic resonance imaging will be required to fully understand the factors governing TD lymph flow.
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Affiliation(s)
- Lucy R Hinton
- Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Lomani A O'Hagan
- Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Andrew P Griffiths
- Department of Radiology, Auckland District Health Board, Auckland, New Zealand
| | - Alys R Clark
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
| | - Anthony R J Phillips
- Applied Surgery and Metabolism Laboratory, School of Biological Sciences, The University of Auckland, Auckland, New Zealand.,Surgical and Translational Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - John A Windsor
- Applied Surgery and Metabolism Laboratory, School of Biological Sciences, The University of Auckland, Auckland, New Zealand.,Surgical and Translational Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - S Ali Mirjalili
- Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
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Tucker AB, Krishnan P, Agarwal S. Lymphovenous shunts: from development to clinical applications. Microcirculation 2021; 28:e12682. [PMID: 33523573 DOI: 10.1111/micc.12682] [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: 01/04/2021] [Accepted: 01/12/2021] [Indexed: 01/19/2023]
Abstract
The lymphatic system is a vast network of vessels that functions to return excess fluid from the interstitial space to the blood stream. Lymphovenous shunts are anastomoses, either natural or surgical, that connect the lymphatic and venous systems. Connections between the thoracic duct and venous system or between the right lymphatic duct and venous system are prime examples of anatomic lymphovenous shunts. Lymphovenous shunts are also present peripherally in tissues such as lymph nodes. Furthermore, pathologic lymphovenous shunts are observed in conditions such as lymphedema, malignancy, and lymphovenous malformations. Surgically, lymphovenous shunts may be constructed as an approach to treat lymphedema. Here, we discuss anatomic and surgical lymphovenous shunts in the context of normal development and disease. This perspective is intended to give an understanding of the role of lymphovenous shunts in health and disease and to show how they can be leveraged to treat disease surgically.
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Affiliation(s)
- A Blake Tucker
- University of Chicago Pritzker School of Medicine, Chicago, IL, USA
| | - Pranav Krishnan
- University of Chicago Pritzker School of Medicine, Chicago, IL, USA
| | - Shailesh Agarwal
- Division of Plastic and Reconstructive Surgery, Brigham and Women's Hospital, Boston, MA, USA
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