Rheological, Structural, and Biological Trade-Offs in Bioink Design for 3D Bioprinting.

Bioinks represent the core of 3D bioprinting, as they are the carrier responsible for enabling the fabrication of anatomically precise, cell-laden constructs that replicate native tissue architecture. Indeed, their role goes beyond structural support, as they must also sustain cellular viability, proliferation, and differentiation functions, which are critical for applications in the field of regenerative medicine and personalized therapies. However, at present, a persistent challenge lies in reconciling the conflicting demands of rheological properties, which are essential for printability and biological functionality.

Highly Soluble Mussel Foot Protein and Its Derivatives Inhibit Inflammation by Targeting NF-κB/PI3K-Akt Signaling and Promoting M2 Macrophage Polarization.

Chronic inflammation is closely associated with various diseases, underscoring the need for natural, biocompatible anti-inflammatory candidates. For this purpose, mussel foot protein could be an excellent candidate due to its diverse biological activities. Hence, this study systematically evaluates the anti-inflammatory effects of a highly soluble mussel foot protein (HMFP) and HMFP-PEG using LPS-stimulated RAW264.

Residual-Free Micro-Nano Titanium Surfaces via Titanium Blasting and Single Acid-Etching: A Cleaner Alternative.

Background: Traditional sandblasted large-grit acid-etched (SLA) surface treatments frequently utilize alumina (AlO) blasting, which may leave residual particles embedded in implant surfaces, potentially compromising biocompatibility and osseointegration. This study investigates a contamination-free alternative: titanium dioxide particle (TiO) blasting followed by hydrochloric acid (HCl) etching, aimed at generating a cleaner, hierarchical micro-nano-textured surface.

Methods: Grade IV titanium disks were treated either with TiO sandblasting alone or with an additional HCl etching step.

Trans Fats in Spanish Pastries and Their Influence on Mesenchymal Stem Cell Behavior In Vitro and Related Health Risks.

Trans fats are linked to numerous chronic diseases and cellular dysfunction; however, Spain has not implemented effective regulatory measures to restrict their presence in food products. This study addressed these gaps by analyzing trans fat content in commercial pastries sold in Spain and their biological impacts on mesenchymal stem cells, further examining its compliance with international guidelines. Also, a novel and scalable method for extracting fatty acids from pastry samples was developed and applied, enabling precise analysis using gas chromatography alongside sensory property assessments.

3D-Printed Polycaprolactone Scaffolds Reinforced with Cellulose Nanocrystals and Silver Nanoparticles for Bone Tissue Engineering.

Cellulose nanocrystals (CNC) have garnered significant attention in pharmaceutical and medical applications due to their biocompatibility, biodegradability, renewability, and strong surface reactivity. In this study, we designed 3D-printed bioactive composite scaffolds via fused deposition modeling (FDM), incorporating polycaprolactone (PCL), CNC derived from Ficus thonningii bark, and silver nanoparticles (AgNps) synthesized through reduction of silver nitrate AgNO. Energy-dispersive X-ray spectroscopy (EDX) confirmed AgNps incorporation, while scanning electron microscopy (SEM) revealed a highly porous, interconnected structure.

Highly Soluble Mussel Foot Protein Enhances Antioxidant Defense and Cytoprotection via PI3K/Akt and Nrf2/HO-1 Pathways.

Mussel foot protein is a bioadhesive protein with potential biomedical applications, but its limited solubility and poor biological stability hinder its widespread use. In this study, highly soluble mussel foot protein (HMFP) was successfully extracted using a stepwise selective enzymatic digestion method, with a molecular weight in the range of 11-17 kDa. Furthermore, a dual-functional polyethylene glycol (PEG) derivative of HMFP, designated HMFP-PEG, was synthesized.

A novel PEGylated squid-derived protamine protein in combination with sorafenib effectively inhibits hepatocellular carcinoma growth.

In recent years, combination therapy has gained attention for improving hepatocellular carcinoma (HCC) treatment. However, the anticancer potential of marine-derived proteins combined with sorafenib remains largely unexplored. This study investigates, for the first time, the anticancer effects and mechanisms of Symplectoteuthis oualaniensis protamine (SOP), its PEG-modified form (SOP-PEG), and sorafenib in Hepa1-6 cells.

Squid-derived protamine: A natural basic protein and its PEGylated derivative as anti-cancer agents in hepatocellular carcinoma.

Protamine is a naturally occurring cationic protein derived from marine organisms. Due to its unique protective and self-repairing properties, it has attracted significant attention in the biomedical field. This study investigates the anticancer effects of SOP and its PEGylated derivative (SOP-PEG) in hepatocellular carcinoma (HCC).

Squid Skin Decellularised Dermal Matrix for Enhancing Repair of Acute Cranial Injuries in Rabbit Model.

Squid skin decellularized dermal matrix (SADM) is gaining attention in tissue engineering and regenerative medicine due to its mimicking of the extracellular matrix property. Hence, SADM was used to investigate mimicking the microenvironment of cellular growth, inducing cellular infiltration and angiogenesis, and facilitating the repair of acute craniofacial wounds. For this, tissue regeneration membranes from squid skin were prepared by decolorization, degreasing and decellularisation methods.

Stem cell-mediated bone regeneration of marine-derived fibrinolytic compound (FGFC-1) loaded carboxymethyl chitosan hydrogels.

Carboxymethyl chitosan (CMC)-based hydrogels (HG) have gained significant attention for therapeutic applications due to their biomimetic properties and biocompatibility. This study explores, for the first time, the regenerative and osteogenic potential of CMC-HG incorporated with a marine fungi-derived fibrinolytic compound, FGFC-1. The inclusion of FGFC-1 did not significantly alter the crucial characteristics of the HGs, including secondary structure, thermal stability, protein adhesion, and in vitro degradation.

Immunomodulatory Effects of Protamine and Its PEG Derivative on Macrophages: Involvement of PI3K/Akt Signaling, Redox Regulation, and Cell Cycle Modulation.

Protamine is a promising marine-derived bioactive compound that is highly arginine-rich and has demonstrated unique advantages in medical and biological research. This study, for the first time, investigates the molecular mechanisms underlying the immunomodulatory effects of Salmon Protamine Sulfate (SPS), Protamine (SOP), and its polyethylene glycol (PEG) derivative (SOP-PEG) on RAW264.7 macrophages.

Advanced 3D biomimetic scaffolds with bioactive glass and bone-conditioned medium for enhanced osteogenesis.

The study focuses on developing and evaluating 3D biomimetic fibrous scaffolds to enhance osteoblast differentiation and bone tissue regeneration. Utilizing a synergistic approach, biological and chemical factors were compartmentalized within the fibrous scaffolds through co-axial electrospinning. Bioactive glass (BG) was used for osteo-conductivity, and Bone-Conditioned Medium (BCM) for osteoinduction.

Polyethylene Glycolylation of the Purified Basic Protein (Protamine) of Squid (): Structural Changes and Evaluation of Proliferative Effects on Fibroblast.

In recent years, arginine-rich basic proteins have garnered significant attention due to their essential roles in various biological processes. However, the potential of marine-derived proteins in this domain remains largely unexplored. This study presents, for the first time, the isolation and purification of a 14.

Bone Remodeling and Marginal Bone Loss of Simplified Versus Conventional Drilling: A Randomized Clinical Trial.

This study evaluates the influence of conventional versus simplified drilling protocols on bone remodeling after the osteointegration period, marginal bone loss (MBL), and primary implant stability. A randomized, double-blind clinical trial was conducted involving 44 implants in 37 patients over a two-year period. The primary outcome was peri-implant tissue stability, measured as MBL at baseline, 12 months, and 24 months.

Ultrasound-Assisted Determination of Selenium in Organic Rice Using Deep Eutectic Solvents Coupled with Inductively Coupled Plasma Mass Spectrometry.

As the focus on green chemistry intensifies, researchers are progressively looking to incorporate biodegradable and environmentally friendly solvents. Given the prevalent use of inorganic solvents in conventional methods for detecting selenium content, this study utilized a mixture design approach to create four deep eutectic solvents (DESs). The elements of the DESs consisted of six different compounds: guanidine hydrochloride, fructose, glycerol, citric acid, proline, and choline chloride.

Recent advancement of novel marine fungi derived secondary metabolite fibrinolytic compound FGFC in biomedical applications: a review.

For several decades, products derived from marine natural sources (PMN) have been widely identified for several therapeutic applications due to their rich sources of bioactive sub-stances, unique chemical diversity, biocompatibility and excellent biological activity. For the past 15 years, our research team explored several PMNs, especially fungi fibrinolytic compounds (FGFCs). FGFC is an isoindolone alkaloid derived from marine fungi, also known as staplabin analogs or triprenyl phenol (SMTP).

Advances in Regenerative Dentistry: A Systematic Review of Harnessing Wnt/β-Catenin in Dentin-Pulp Regeneration.

Dentin pulp has a complex function as a major unit in maintaining the vitality of teeth. In this sense, the Wnt/β-Catenin pathway has a vital part in tooth development, maintenance, repair, and regeneration by controlling physiological activities such as growth, differentiation, and migration. This pathway consists of a network of proteins, such as Wnt signaling molecules, which interact with receptors of targeted cells and play a role in development and adult tissue homeostasis.

Purification and Characterization of a Novel Fibrinolytic Enzyme from Marine Bacterium sp. S-3685 Isolated from the South China Sea.

A novel fibrinolytic enzyme, BSFE1, was isolated from the marine bacterium sp. S-3685 (GenBank No.: KJ023685) found in the South China Sea.

Stem-Cell-Regenerative and Protective Effects of Squid () Skin Collagen Peptides against HO-Induced Fibroblast Injury.

Recently, there has been a growing interest in collagen peptides derived from marine sources for their notable ability to protect skin cells against apoptosis induced by oxidants. Therefore, the current study aimed to investigate the fundamental properties of collagen peptides, including their physicochemical, thermal, structural, stem-cell-regenerative, and skin-cell-protective effects, in comparison to commercial collagen peptides. The acid-soluble (ASC) and pepsin-soluble (PSC) collagens exhibited three distinct bands on SDS-PAGE, namely α (α and α), β, and γ chains, confirming a type I pattern.

Protein Adsorption, Calcium-Binding Ability, and Biocompatibility of Silver Nanoparticle-Loaded Polyvinyl Alcohol (PVA) Hydrogels Using Bone Marrow-Derived Mesenchymal Stem Cells.

Several approaches have evolved to facilitate the exploration of hydrogel systems in biomedical research. In this sense, poly(vinyl alcohol) (PVA) has been widely used in hydrogel (HG) fabrication for several therapeutic applications. The biological properties of PVA hydrogels (PVA-HGs) are highly dependent on their interaction with protein receptors and extracellular matrix (mainly calcium) deposition, for which there is not enough evidence from existing research yet.

Collagen from Iris squid grafted with polyethylene glycol and collagen peptides promote the proliferation of fibroblast through PI3K/AKT and Ras/RAF/MAPK signaling pathways.

Collagens from marine sources have been used widely in food, cosmetics and tissue engineering application due to their excellent functional and biological properties. In the present study, a novel protein, collagen from iris squid skin (SSC) was characterized, grafted with polyethylene-glycol (PEG) and Acid-Green 20 (AG) and was investigated the molecular signaling pathways in L-929 fibroblast cells along with their structural peptide analogs. SDS-PAGE and IR spectrum of SSC analysis showed the typical structure of type I collagen.

Fabrication, Physical-Chemical and Biological Characterization of Retinol-Loaded Poly(vinyl Alcohol) Electrospun Fiber Mats for Wound Healing Applications.

Nowadays, there exists a huge interest in producing innovative, high-performance, biofunctional, and cost-efficient electrospun biomaterials based on the association of biocompatible polymers with bioactive molecules. Such materials are well-known to be promising candidates for three-dimensional biomimetic systems for wound healing applications because they can mimic the native skin microenvironment; however, many open questions such as the interaction mechanism between the skin and the wound dressing material remain unclear. Recently, several biomolecules were intended for use in combination with poly(vinyl alcohol) (PVA) fiber mats to improve their biological response; nevertheless, retinol, an important biomolecule, has not been combined yet with PVA to produce tailored and biofunctional fiber mats.

The Role of Integrin Receptor's α and β Subunits of Mouse Mesenchymal Stem Cells on the Interaction of Marine-Derived Blacktip Reef Shark () Skin Collagen.

Marine collagen (MC) has recently attracted more attention in tissue engineering as a biomaterial substitute due to its significant role in cellular signaling mechanisms, especially in mesenchymal stem cells (MSCs). However, the actual signaling mechanism of MC in MSC growth, which is highly influenced by their molecular pattern, is poorly understood. Hence, we investigated the integrin receptors (αβ, αβ, αβ, and αβ) binding mechanism and proliferation of MCs (blacktip reef shark collagen (BSC) and blue shark collagen (SC)) compared to bovine collagen (BC) on MSCs behavior through functionalized collagen molecule probing for the first time.

Isolation and Biochemical Properties of Type II Collagen from Blue Shark () Cartilage.

Numerous studies have shown that type II collagen (CII) has a potential role in the treatment of rheumatoid arthritis. However, most of the current studies have used terrestrial animal cartilage as a source of CII extraction, with fewer studies involving marine organisms. Based on this background, collagen (BSCII) was isolated from blue shark () cartilage by pepsin hydrolysis and its biochemical properties including protein pattern, total sugar content, microstructure, amino acid composition, spectral characteristics and thermal stability were further investigated in the present study.