scholarly journals Modulation of the inflammatory response to decellularized collagen matrix for cartilage regeneration

2021 ◽  
Author(s):  
David Gvaramia ◽  
Johann Kern ◽  
Yvonne Jakob ◽  
Hanna Tritschler ◽  
Rolf E. Brenner ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Cartilage Regeneration ◽  
Collagen Matrix

Cartilage Regeneration with Cell-free Type 1 Collagen Matrix – Past, Present and Future (Part 1 – Clinical Aspects)

2020 ◽  
Author(s):  
Philip Peter Roessler ◽  
Turgay Efe ◽  
Dieter Christian Wirtz ◽  
Frank Alexander Schildberg
Keyword(s):  
Type I Collagen ◽  
Case Series ◽  
Cartilage Regeneration ◽  
Collagen Matrix ◽  
Treatment Method ◽  
Collagen Type I ◽  
Legal Framework ◽  
Clinical Aspects ◽  
Type I ◽  
Collagen Hydrogel

AbstractCartilage regeneration with cell-free matrices has developed from matrix-associated autologous cartilage cell transplantation (MACT) over ten years ago. Adjustments to the legal framework and higher hurdles for cell therapy have led to the procedures being established as an independent alternative to MACT. These procedures, which can be classified as matrix-induced autologous cartilage regeneration (MACR), all rely on the chemotactic stimulus of a cross-linked matrix, which mostly consists of collagens. Given the example of a commercially available type I collagen hydrogel, the state of clinical experience with MACR shall be summarized and an outlook on the development of the method shall be provided. It has been demonstrated in the clinical case series summarized here over the past few years that the use of the matrix is not only safe but also yields good clinical-functional and MR-tomographic results for both small (~ 10 mm) and large (> 10 mm) focal cartilage lesions. Depending on the size of the defect, MACR with a collagen type I matrix plays an important role as an alternative treatment method, in direct competition with both: microfracture and MACT.

scholarly journals Platelet-Rich Plasma Does Not Inhibit Inflammation or Promote Regeneration in Human Osteoarthritic Chondrocytes In Vitro Despite Increased Proliferation

Cartilage ◽  
2020 ◽  
pp. 194760352096116
Author(s):  
Margot Rikkers ◽  
Koen Dijkstra ◽  
Bastiaan F. Terhaard ◽  
Jon Admiraal ◽  
Riccardo Levato ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Platelet Rich Plasma ◽  
Cartilage Regeneration ◽  
Human Chondrocytes ◽  
Fibrin Gels ◽  
Expression Of Genes ◽  
Immuno Histochemistry ◽  
Anti Inflammatory ◽  
Factor Α

Objective The aims of the study were to assess the anti-inflammatory properties of platelet-rich plasma (PRP) and investigate its regenerative potential in osteoarthritic (OA) human chondrocytes. We hypothesized that PRP can modulate the inflammatory response and stimulate cartilage regeneration. Design Primary human chondrocytes from OA knees were treated with manually prepared PRP, after which cell migration and proliferation were assessed. Next, tumor necrosis factor-α–stimulated chondrocytes were treated with a range of concentrations of PRP. Expression of genes involved in inflammation and chondrogenesis was determined by real-time polymerase chain reaction. In addition, chondrocytes were cultured in PRP gels and fibrin gels consisting of increasing concentrations of PRP. The production of cartilage extracellular matrix (ECM) was assessed. Deposition and release of glycosaminoglycans (GAG) and collagen was quantitatively determined and visualized by (immuno)histochemistry. Proliferation was assessed by quantitative measurement of DNA. Results Both migration and the inflammatory response were altered by PRP, while proliferation was stimulated. Expression of chondrogenic markers COL2A1 and ACAN was downregulated by PRP, independent of PRP concentration. Chondrocytes cultured in PRP gel for 28 days proliferated significantly more when compared with chondrocytes cultured in fibrin gels. This effect was dose dependent. Significantly less GAGs and collagen were produced by chondrocytes cultured in PRP gels when compared with fibrin gels. This was qualitatively confirmed by histology. Conclusions PRP stimulated chondrocyte proliferation, but not migration. Also, production of cartilage ECM was strongly downregulated by PRP. Furthermore, PRP did not act anti-inflammatory on chondrocytes in an in vitro inflammation model.

scholarly journals Delayed chemical meningitis after Chiari decompression with duraplasty: illustrative cases

2021 ◽  
Vol 2 (19) ◽  
Author(s):  
Orgest Lajthia ◽  
Mithun G. Sattur ◽  
Abhay K. Varma
Keyword(s):  
Inflammatory Response ◽  
Aseptic Meningitis ◽  
Case Series ◽  
Collagen Matrix ◽  
Decompression Surgery ◽  
Dural Substitute ◽  
Bovine Collagen ◽  
Suboccipital Decompression ◽  
Chemical Meningitis

BACKGROUND Dural reconstruction to achieve expansion duraplasty is important in suboccipital decompression for Chiari malformation type 1 (CM1). Although various dural substitutes are available, including synthetic collagen matrix grafts and dural xenografts, they have the potential to induce an inflammatory response. In this case series, the authors present their experience and discuss the incidence and possible mechanism of aseptic meningitis after the use of bovine collagen matrix graft as a dural substitute in patients with CM1 after suboccipital decompression. OBSERVATIONS Three consecutive adult female patients who underwent suboccipital decompression at a single institution by a single neurosurgeon were retrospectively reviewed. They all presented with signs of aseptic meningitis in a delayed fashion, responded well to steroid administration, but had recurrence of their symptoms. Bovine collagen dural substitutes are resorbed in a process that induces an inflammatory response manifesting with signs of aseptic meningitis and is only alleviated with removal of the dural substitute. LESSONS DuraMatrix Suturable, a dural xenograft derived from bovine dermis, though a viable choice for dural repair, is a potential cause of chemical meningitis after duraplasty in Chiari decompression surgery. In patients presenting with delayed and persistent aseptic meningitis after intervention, removal of this dural substitute led to improved symptomatology.

Gut permeabillity and nitric oxide: Evidence for an endotoxin mediated inflammatory response in severe acute pancreatitis

2001 ◽  
Vol 120 (5) ◽  
pp. A468-A469
Author(s):  
S RAHMAN ◽  
B AMMORI ◽  
I MARTIN ◽  
G BARCLAY ◽  
M LARVIN ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Acute Pancreatitis ◽  
Inflammatory Response ◽  
Severe Acute Pancreatitis

ERK and PKCξ independently contribute to the EPEC-induced inflammatory response

2001 ◽  
Vol 120 (5) ◽  
pp. A126-A126
Author(s):  
S SAVKOVIC ◽  
Z KAPADIA ◽  
A KOUTSOURIS ◽  
G HECHT
Keyword(s):  
Inflammatory Response

Sorghum Fermented by Aspergillus oryzae NK Enhances Inhibition of Vascular Inflammation in TNF-α-stimulated Human Aortic Smooth Muscle Cells

2018 ◽  
Vol 88 (5-6) ◽  
pp. 309-318
Author(s):  
Hae Seong Song ◽  
Jung-Eun Kwon ◽  
Hyun Jin Baek ◽  
Chang Won Kim ◽  
Hyelin Jeon ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Inflammatory Response ◽  
Smooth Muscle Cells ◽  
Adhesion Molecule ◽  
Vascular Inflammation ◽  
Muscle Cells ◽  
Aortic Smooth Muscle Cells ◽  
Aortic Smooth Muscle ◽  
Tnf Α ◽  
Cox 2

Abstract. Sorghum bicolor L. Moench is widely grown all over the world for food and feed. The effects of sorghum extracts on general inflammation have been previously studied, but its anti-vascular inflammatory effects are unknown. Therefore, this study investigated the anti-vascular inflammation effects of sorghum extract (SBE) and fermented extract of sorghum (fSBE) on human aortic smooth muscle cells (HASMCs). After the cytotoxicity test of the sorghum extract, a series of experiments were conducted. The inhibition effects of SBE and fSBE on the inflammatory response and adhesion molecule expression were measured using treatment with tumor necrosis factor-α (TNF-α), a crucial promoter for the development of atherosclerotic lesions, on HASMCs. After TNF-α (10 ng/mL) treatment for 2 h, then SBE and fSBE (100 and 200 μg/mL) were applied for 12h. Western blotting analysis showed that the expression of vascular cell adhesion molecule-1 (VCAM-1) (2.4-fold) and cyclooxygenase-2 (COX-2) (6.7-fold) decreased, and heme oxygenase-1 (HO-1) (3.5-fold) increased compared to the TNF-α control when treated with 200 μg/mL fSBE (P<0.05). In addition, the fSBE significantly increased the expression of HO-1 and significantly decreased the expression of VCAM-1 and COX-2 compared to the TNF-α control in mRNA level (P<0.05). These reasons of results might be due to the increased concentrations of procyanidin B1 (about 6-fold) and C1 (about 30-fold) produced through fermentation with Aspergillus oryzae NK for 48 h, at 37 °C. Overall, the results demonstrated that fSBE enhanced the inhibition of the inflammatory response and adherent molecule expression in HASMCs.

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