Biology subjects

Amirvaresi, A.

Publications and source records attributed to Amirvaresi, A..

4 recordsLinked to original sources

bioRxiv2024

Evaluating the Efficacy of Serum-Free Media Supplemented with Protein Isolates for Bovine Satellite Cell Proliferation: A Sustainable Approach for Cultivated Meat Production

This study investigates the short- and long-term efficacy of serum-free media supplemented with protein isolates from algae, alfalfa, silkworm pupae, and grasshoppers for the proliferation of bovine satellite cells (BSCs). Fresh and spent media were analyzed to monitor metabolites, while cell proliferation was assessed using the CyQUANT assay. The results of the short-term growth study indicated that a lower concentration of alfalfa protein isolate (0.05 mg/mL) significantly enhanced cell proliferation, achieving a 1.47-fold increase compared to basal media, thereby demonstrating its potential as a viable alternative to fetal bovine serum (FBS). The capability of the developed serum-free media for cell passaging was examined using different coating strategies, with vitronectin outperforming others; however, it was unable to support the long-term growth of cells compared to FBS-containing media. Given the critical role of glutamine, this study also evaluates the impact of L-glutamine supplementation at different concentrations on cell growth and metabolism in alfalfa-based media. However, while glutamine supplementation showed trends toward increased cell growth, the enhancements were not statistically significant. Based on the results, this study highlights the potential of alfalfa protein isolate as a promising component of serum-free media for BSC proliferation and underscores the need for continued research into alternative protein sources and media formulations to support the sustainable and ethical production of cultivated meat.

bioengineering↗

bioRxiv2024

Assessment of Plant- and Microbial-Derived Protein Hydrolysates as Sustainable for Fetal Bovine Serum in Seafood Cell Culture Media

This study seeks to explore alternatives by substituting or reducing the conventional 10% serum concentration in Zebrafish embryonic stem cell (ESC) growth media with protein hydrolysates sourced from peas, mushrooms, yeast, and algae. Notably, algae exhibited the highest protein content, optimal amino acid balance, and favorable functional properties. When applied at concentrations ranging from 1 to 10 mg/mL, all protein hydrolysates demonstrated pro-apoptotic effects and inhibited cell growth, particularly when used in conjunction with 10% serum. However, concentrations ranging from 0.001 to 0.1 mg/mL displayed anti-apoptotic properties and promoted cell proliferation. The study found that media containing 1% or 2.5% serum, along with 0.01 mg/mL of protein hydrolysates, supported cell growth effectively. Lactate Dehydrogenase (LDH) Activity served as an indicator of cell health and integrity under the specified conditions of protein hydrolysate supplementation. Cells cultured in serum-free media exhibited significantly decreased cell membrane integrity (P < 0.05) compared to those in regular media or media containing low serum (1% and 2.5%) along with low concentrations (0.01 mg/mL) of protein hydrolysates. Furthermore, analysis of Greenhouse Gas emissions (GHG) suggested that media formulations containing 1% serum combined with low concentrations of protein hydrolysates present a sustainable approach for cell-based seafood production.

bioengineering↗

bioRxiv2024

Black Soldier Fly Bioconversion to Cultivated Meat Media Components Using Blue Catfish Gut Microbiome

Developing low-cost media is one of the major challenges in the cellular agriculture domain. Thus, this study aimed to develop low-cost media for cell-cultivated seafood using gut-microbial community-assisted fermentation. Black soldier fly larvae (Hermetia illucens) were used as the substrate and exposed to gut microbial communities isolated from Blue catfish (Ictalurus furcatus). In the first step, BSFL slurry was subjected to enzymatic digestion, using pepsin and trypsin to mimic animal digestive processes. The results showed a 2.8% degree of hydrolysis after digestion with pepsin and an additional 5.9% after digestion with trypsin. In the second step, two fermentation approaches were tested, including the direct addition of gut homogenate to the hydrolysates (fermentation A) and the establishment of microbial cultures from the gut homogenate before fermentation (fermentation B). Both fermentations resulted in similar protein content and degree of hydrolysis. Fermentation led to a decrease in species richness, with the loss of important chitinase and protease-producing genera such as Pseudomonas and Clostridiaceae. However, there was an increase in Paraclostridium and members of the Enterobacteriaceae. In addition, the effect of fermented hydrolysates from BSFL on the proliferation of zebrafish embryo fibroblasts was tested in comparison to fetal bovine serum (FBS) in in vitro cell cultivation. Lower concentrations of FBS resulted in decreased cell density and altered cell morphology. The supplementation of hydrolysate B at high peptide concentrations had cytotoxic effects on the cells, while at lower peptide concentrations, it improved cell proliferation only in cultures with 2.5% FBS.

bioengineering↗

bioRxiv2023

Decellularized Banana Leaves: Eco-Friendly Scaffolds for Cell-Based Seafood

Cellular agriculture, as an emerging food production system, holds potential to address sustainability, food security, and agricultural resilience. Within the cell-based meat supply chain, one of the key steps is scaffolding. In this study, we assessed decellularized banana leaves, various coating materials, and different cell seeding strategies to determine their effects on cell viability, cell growth, cell alignment, and the response of the materials to thermal processing. The efficiency of decellularization was verified through DNA quantification, which decreased from 445 ng/mg in fresh banana leaves to non-detectable levels in the decellularized samples. This was further confirmed by FTIR and PCA modeling. Cell viability exceeded 98% on uncoated, soy-coated, and gelatin-coated samples of the decellularized banana leaves. Alignment of cells on gelatin-coated samples was the highest among the samples, with a dominant orientation of 65.8{degrees}, compared to soy-coated and uncoated samples with dominant orientations of 9.2{degrees} and -6.3{degrees}, respectively. In terms of quality attributes, the kinetics of shrinkage indicated that coating with soy and the presence of cells increased the activation energy due to the higher energy required for protein denaturation. Moreover, the kinetics of area changes in plain scaffolds without cells followed a first-order pattern, while with seeded cells a second-order pattern was followed. In summary, decellularized banana leaves present a sustainable and suitable biomaterial to support cells towards future needs related to meat production.

synthetic biology↗