scholarly journals Could human amniotic membrane be a source for acupoint thread embedding therapy?

2021 ◽  
Vol 64 (6) ◽  
pp. 41-48
Author(s):  
Olga Ignatov ◽  
◽  
Adrian Melnic ◽  
Vitalie Procopciuc ◽  
Viorica Mihaluta ◽  
...  
Keyword(s):  
Extracellular Matrix ◽  
Amniotic Membrane ◽  
Subcutaneous Tissue ◽  
Biomechanical Properties ◽  
Functional Restoration ◽  
Matrix Proteins ◽  
Human Amniotic Membrane ◽  
Ethical Problems ◽  
Motor Disability ◽  
Embedding Therapy

Background: Peripheral neuropathy usually leads to a major cause of motor disability, but the functional restoration after treatment continues to show modest results. Acupoint thread-embedding therapy is a subtype of acupuncture treatment in which biodegradable threads are inserted into skin, subcutaneous tissue or muscles at specific points for long stimulation. Different biodegradable materials have been developed and widely used. Human amniotic membrane is rich in collagen, extracellular matrix proteins and growth factors. The avascular, low immunogenic, anti-inflammatory, antibacterial, anti-fibrotic and non-tumorigenic properties of amniotic membrane make it valuable in medical applications and its use has no ethical problems. Elasticity, stiffness and other biomechanical properties also make it possible to use the amniotic membrane for various medical purposes. AM is almost always considered as discarded substance, it satisfies most of the criteria of an ideal biological tissue and shows almost zero rejection phenomenon. Conclusions: The human amniotic membrane, the cellular compounds and extracellular matrix have a lot of benefic proprieties that are or could be used in treatment of many human diseases. Its biological and biomechanical properties are promising in the manufacture and use of filaments in acupoint thread embedding therapy.

scholarly journals Adipose-Derived Stromal Cells and Mineralized Extracellular Matrix Delivery by a Human Decellularized Amniotic Membrane in Periodontal Tissue Engineering

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 606
Author(s):  
Dilcele Silva Moreira Dziedzic ◽  
Bassam Felipe Mogharbel ◽  
Ana Carolina Irioda ◽  
Priscila Elias Ferreira Stricker ◽  
Maiara Carolina Perussolo ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Extracellular Matrix ◽  
Bone Tissue ◽  
Amniotic Membrane ◽  
Stromal Cells ◽  
Cell Attachment ◽  
Periodontal Regeneration ◽  
Human Amniotic Membrane ◽  
Micro Computed Tomography ◽  
Adipose Derived Stromal Cells

Periodontitis is a prevalent disease characterized by the loss of periodontal supporting tissues, bone, periodontal ligament, and cementum. The application of a bone tissue engineering strategy with Decellularized Human Amniotic Membrane (DAM) with adipose-derived stromal cells (ASCs) has shown to be convenient and valuable. This study aims to investigate the treatments of a rat periodontal furcation defect model with DAM, ASCs, and a mineralized extracellular matrix (ECM). Rat ASCs were expanded, cultivated on DAM, and with a bone differentiation medium for four weeks, deposited ECM on DAM. Periodontal healing for four weeks was evaluated by micro-computed tomography and histological analysis after treatments with DAM, ASCs, and ECM and compared to untreated defects on five consecutive horizontal levels, from gingival to apical. The results demonstrate that DAM preserves its structure during cultivation and healing periods, supporting cell attachment, permeation, bone deposition on DAM, and periodontal regeneration. DAM and DAM+ASCs enhance bone healing compared to the control on the gingival level. In conclusion, DAM with ASC or without cells and the ECM ensures bone tissue healing. The membrane supported neovascularization and promoted osteoconduction.

Eosinophilic fasciitis (Shulman disease) with clinical, imaging and pathological correlation

2021 ◽  
Vol 14 (12) ◽  
pp. e246151
Author(s):  
Ana Primitivo ◽  
Nathalie Madeira ◽  
Dolores Lopez ◽  
Diana Afonso
Keyword(s):  
Extracellular Matrix ◽  
Early Diagnosis ◽  
Imaging Modality ◽  
Subcutaneous Tissue ◽  
Diagnostic Value ◽  
Matrix Proteins ◽  
Eosinophilic Fasciitis ◽  
Unknown Aetiology ◽  
Clinical Imaging ◽  
Pathological Correlation

Eosinophilic fasciitis (EF) is a rare subacute fibrosing disorder of unknown aetiology, characterised by thickening of the muscular fascia and subcutaneous tissue, leading to swelling of limbs and trunk and sparing fingers and toes. Eosinophilic infiltration and degranulation may prompt tissue damage and consequent fibrosis due to the accumulation of collagen and extracellular matrix proteins. MRI is the best imaging modality for diagnosis, depicting fascial thickening and enhancement. MRI may also have a significant role in excluding alternative diagnosis and guiding the skin–muscle biopsy.We report a case of EF with clinical and pathological correlation, highlighting the diagnostic value of MRI for early diagnosis and further treatment.

scholarly journals Angiogenic potential of extracellular matrix of human amniotic membrane

2016 ◽  
Vol 13 (3) ◽  
pp. 211-217 ◽  
Author(s):  
Siti Nurnasihah Md Hashim ◽  
Muhammad Fuad Hilmi Yusof ◽  
Wafa’ Zahari ◽  
Khairul Bariah Ahmad Amin Noordin ◽  
Thirumulu Ponnuraj Kannan ◽  
...  
Keyword(s):  
Extracellular Matrix ◽  
Amniotic Membrane ◽  
Human Amniotic Membrane ◽  
Angiogenic Potential

scholarly journals Human Amniotic Membrane Enriched with Urinary Bladder Fibroblasts Promote the Re-Epithelization of Urothelial Injury

2020 ◽  
Vol 29 ◽  
pp. 096368972094666
Author(s):  
Urška Dragin Jerman ◽  
Peter Veranič ◽  
Tina Cirman ◽  
Mateja Erdani Kreft
Keyword(s):  
Extracellular Matrix ◽  
Amniotic Membrane ◽  
Wound Dressing ◽  
Ex Vivo ◽  
Cell Junctions ◽  
Human Amniotic Membrane ◽  
Urothelial Cells ◽  
Ex Vivo Model ◽  
Bladder Tissue ◽  
Extracellular Matrix Components

Culturing cells in three-dimensional systems that include extracellular matrix components and different cell types mimic the native tissue and as such provide much more representative results than conventional two-dimensional cell cultures. In order to develop biomimetic bladder tissue in vitro, we used human amniotic membrane (AM) extracellular matrix as a scaffold for bladder fibroblasts (BFs) and urothelial cells. Our aims were to evaluate the integration of BFs into the AM stroma, to assess the differentiation of the urothelium on BFs-enriched AM scaffolds, and to evaluate the AM as a urothelial wound dressing. First, to achieve the optimal integration of BFs into AM stroma, different intact and de- epithelialized AM (dAM) scaffolds were tested. BFs secreted matrix metalloproteinase (MMP)-1 and MMP-2 and integrated into the stroma of all types of AM scaffolds. Second, to establish urothelial tissue equivalent, urothelial cells were seeded on dAM scaffolds enriched with BFs. The BFs in the stroma of the AM scaffolds promoted (1) the proliferation of urothelial cells, (2) the attachment of urothelial cells on AM basal lamina with hemidesmosomes, and (3) development of multilayered urothelium with expressed uroplakins and well-developed cell junctions. Third, we established an ex vivo model of the injured bladder to evaluate the dAM as a wound dressing for urothelial full-thickness injury. dAM acted as a promising wound dressing since it enabled rapid re-epithelization of urothelial injury and integrated into the bladder tissue. Herein, the developed urothelial tissue equivalents enable further mechanistic studies of bladder epithelial–mesenchymal interactions, and they could be applied as biomimetic models for preclinical testing of newly developed drugs. Moreover, we could hypothesize that AM may be suitable as a dressing of the wound that occurs during transurethral resection of bladder tumor, since it could diminish the possibility of tumor recurrence, by promoting the rapid re-epithelization of the urothelium.

Altered Mechanical Properties and Fiber Re-Alignment in Diabetic Mouse Supraspinatus and Achilles Tendons

2012 ◽  
Author(s):  
Brianne K. Connizzo ◽  
Kenneth W. Liechty ◽  
Louis J. Soslowsky
Keyword(s):  
Mechanical Properties ◽  
Extracellular Matrix ◽  
Insertion Site ◽  
Joint Stiffness ◽  
Biomechanical Properties ◽  
Diabetic Mouse ◽  
Matrix Proteins ◽  
Matrix Composition ◽  
Tendon Stiffness ◽  
Diabetic Population

Tendons function to transfer load, maintain alignment and permit motion in joints. To perform these functions, tendons have complex mechanical behavior which is modulated by the tissue’s structure and composition, such as the collagen fibers and surrounding extracellular matrix. When these matrix proteins are altered, the mechanical properties are also altered, which could potentially lead to reduced loading and healing capacity. Diabetes is a metabolic disease which, among other co-morbidities, has been associated with Achilles tendon disorganization and tendinopathy, as well as increased overall joint stiffness in humans [1]. We have recently reported that the skin from the Db/Db diabetic mouse, a model of Type II Diabetes, as well as the skin from human diabetics, have impaired biomechanical properties compared to non-diabetic skin as the result of altered extracellular matrix composition. [2]. However, the mechanical properties of tendons from these animals have never been studied and could serve as a unique model of altered collagen structure as well as provide further understanding to the cause of tendinous injuries in the diabetic population. Therefore, the objective of this study is to measure the tensile mechanical properties and collagen fiber re-alignment in the db/db mouse model compared to non-diabetic controls. We hypothesize that tendon stiffness and modulus will be increased in the db/db group in the insertion site and midsubstance, and that db/db tendons will re-align earlier and faster during the testing protocol.

Development of an in vitro Model for the Study of the Response of Equine Tendon Fibroblasts to Injury and Medication

1997 ◽  
Vol 10 (01) ◽  
pp. 6-11 ◽  
Author(s):  
R. F. Rosenbusch ◽  
L. C. Booth ◽  
L. A. Dahlgren
Keyword(s):  
Electron Microscopy ◽  
Extracellular Matrix ◽  
Light Microscopy ◽  
Light And Electron Microscopy ◽  
Tendon Healing ◽  
Matrix Proteins ◽  
Isolated Cells ◽  
Superficial Digital Flexor Tendon ◽  
Vitro Model

SummaryEquine tendon fibroblasts were isolated from explants of superficial digital flexor tendon, subcultured and maintained in monolayers. The cells were characterized by light microscopy, electron microscopy and radiolabel studies for proteoglycan production. Two predominant cell morphologies were identified. The cells dedifferentiated toward a more spindle shape with repeated subcultures. Equine tendon fibroblasts were successfully cryopreserved and subsequently subcultured. The ability to produce proteoglycan was preserved.The isolated cells were identified as fibroblasts, based on their characteristic shape by light microscopy and ultrastructure and the active production of extracellular matrix proteins. Abundant rough endoplasmic reticulum and the production of extracellular matrix products demonstrated active protein production and export. Proteoglycans were measurable via liquid scintillation counting in both the cell-associated fraction and free in the supernatant. This model is currently being utilized to study the effects of polysulfated glycosaminoglycan on tendon healing. Future uses include studying the effects of other pharmaceuticals, such as hyaluronic acid, on tendon healing.A model was developed for in vitro investigations into tendon healing. Fibroblasts were isolated from equine superficial digital flexor tendons and maintained in monolayer culture. The tenocytes were characterized via light and electron microscopy. Proteoglycan production was measured, using radio-label techniques. The fibroblasts were cryopreserved and subsequently subcultured. The cells maintained their capacity for proteoglycan production, following repeated subculturing and cryopreservation.

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