Journal: Materials Futures

Article Title: A clinically defined and xeno-free hydrogel system for regenerative medicine

doi: 10.1088/2752-5724/ae4e4d

Figure Lengend Snippet: Substrate characterisation in 2D and 3D cell culture—biological responses and physical properties with different compositions. (a) hPSC confluence in 2D growth factor-reduced Matrigel (Geltrex), laminin 521, fibrin-laminin hydrogel, and fibrin gel after 4 d; scale bar = 100 μ m. (b) hPSCs cultured in 3D hydrogels. Top panel: fibrin (5 mg ml −1 ) gel. Bottom panel: Alphagel containing structures resembling pluripotent spheroids; scale bar = 200 μ m. Scanning electron microscopy of (c) fibrin gel and (d) Alphagel; scale bar = 1 μ m, magnification 20 K X, iProbe = 13 pA, 2.00 kV, Working Distancee = 4.4 mm for both images. (e) Young’s moduli in hydrogels with varying fibrin and laminin concentrations. One-way ANOVA; ** = p < 0.01, *** = p < 0.001, and **** = p < 0.0001. (f) Cell viability of hPSCs cultured in Alphagel, fibrin-only hydrogels, and 2D standard substrates. Mean ± sandard error of the mean displayed. t -test; * = p < 0.05. (g) ELISA of laminin 521 in culture media used with acellular Alphagel and (h) the calculated amount of fibrin-bound laminin.

Article Snippet: Apolipoprotein B (APOB) secretion in the supernatant was quantified using the human APOB ELISA quantification kit (Mabtech, no. 3715-1H-6) according to the product literature.

Techniques: Cell Culture, Electron Microscopy, Enzyme-linked Immunosorbent Assay

Journal: Materials Futures

Article Title: A clinically defined and xeno-free hydrogel system for regenerative medicine

doi: 10.1088/2752-5724/ae4e4d

Figure Lengend Snippet: Characterisation of iHeps derived in Alphagel, fibrin-only hydrogels, and Matrigel. (a) Key hepatocyte markers in Alphagel-derived iHeps. ALB = albumin, HNF = hepatocyte nuclear factor, CYP2A6 = Cytochrome P450 2A6, CD147 = cluster of differentiation protein 147, and E-CAD = E-cadherin. Scale bar = 25 μ m. (b) Key hepatocyte markers by gene expression (qPCR): CCAAT/enhancer-binding protein alpha (CEBPA), T-box transcription factor 3= TBX3, alpha-fetoprotein = AFP. (c) Albumin secretion (ELISA) and (d) CYP3A4 activity (P450-Glo TM ) in PHHs versus iHeps cultured in various gels (day 22). HCM = Hepatocyte Culture Media (Lonza). (e) LDL uptake (red) in Alphagel-derived iHeps versus hPSCs. Scale bar = 100 μ m. (f) CDFDA secretion (green) in Alphagel-derived iHeps versus hPSCs. Top panel scale bar = 20 μ m; bottom panel scale bar = 50 μ m. One-way ANOVA was used; * = p < 0.05, ** = p < 0.01, *** = p < 0.001, and **** = p < 0.0001.

Article Snippet: Apolipoprotein B (APOB) secretion in the supernatant was quantified using the human APOB ELISA quantification kit (Mabtech, no. 3715-1H-6) according to the product literature.

Techniques: Derivative Assay, Gene Expression, Binding Assay, Enzyme-linked Immunosorbent Assay, Activity Assay, Cell Culture

Journal: Materials Futures

Article Title: A clinically defined and xeno-free hydrogel system for regenerative medicine

doi: 10.1088/2752-5724/ae4e4d

Figure Lengend Snippet: Characterisation of iHeps cultured in Hepatogel and its effect on cell retention after intra-hepatic cell transplantation. (a) Differentially expressed genes in iHeps: Hepatologel, Alphagel, Matrigel, and adult PHHs. (b) A heat map summarising the differential gene expression of a hepatic 24-gene panel across replicates of Matrigel, Alphagel, and Hepatogel (normalised to hPSC). (c) Albumin ELISA of culture media and (d) luciferin-based measure of CYP3A4 activity: 2 d after completion of iHep differentiation and 2 d after plating PHHs. One-way ANOVA; * = p < 0.05, ** = p < 0.01, *** = p < 0.001, and **** = p < 0.0001. (e) Mouse livers 3 d after intra-hepatic injection with H-iHeps in Hepatogel and 0.9% saline. Red box = area magnified. * = site of injection, dotted white lines demarcate engrafted cell mass. Scale bar = 1 mm. (f) Human albumin (stained red) in engrafted iHeps 3 d after intra-hepatic injection. Scale bar = 100 μ m. (g) H-iHeps identified by albumin staining on liver histology 3 d after intra-hepatic injection. (h) ELISA of mouse serum for human albumin after injection with H-iHeps in Hepatogel and 0.9% saline over time. Day 0 = serum levels before injection. T -test; *** = p < 0.001 and **** = p < 0.0001.

Article Snippet: Apolipoprotein B (APOB) secretion in the supernatant was quantified using the human APOB ELISA quantification kit (Mabtech, no. 3715-1H-6) according to the product literature.

Techniques: Cell Culture, Transplantation Assay, Gene Expression, Enzyme-linked Immunosorbent Assay, Activity Assay, Injection, Saline, Staining