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6 protocols using hyclone water

1

Synthetic Wound Fluid for Research

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Synthetic wound fluid (SWF) comprised equal volumes of foetal bovine serum (Gibco) and peptone water (Sigma-Aldrich)24 (link). Mueller–Hinton Broth (MHB) was obtained from VWR. HyClone water (GE Healthcare) was used throughout.
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2

Alginate-Gelatin Hydrogel Bioprinting

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0.3 g of gelatin (Type B, Sigma-Aldrich, St. Louis, MO, USA) is first dissolved in 10 ml of water (HyClone™ Water, GE Healthcare Life Sciences). The covered glass beaker is maintained at ~40°C while being magnetically stirred. On gelatin dissolution, 0.3 g of sodium alginate (Sigma-Aldrich, St. Louis, MO, USA) is added to the solution and mixed for at least 6 h to prepare the gelatin-alginate hydrogel. 8 × 106 cells are suspended in 200 µL of CCM and mixed with 4 ml of hydrogel for 5 min in the beaker using a magnetic stirrer to obtain a uniform distribution of cells (2 × 106 cells/ml) in the gelatin-alginate bioink. The bioink is then transferred to a 3 ml syringe barrel attached with 22G or 410 µm internal diameter tips before bioprinting. To prepare a bioink with the incorporation of glass, 0.06 g of 13-93B3 glass (10 wt% of hydrogel material) is added to the gelatin solution and stirred to obtain uniform suspension of glass particles. sodium alginate is then added to the solution and stirred to obtain the Alg-Gel-glass hydrogel. ASCs suspended in CCM are first hand-mixed in gel and later magnetically stirred for no more than 5 min to obtain a uniform distribution of the ASCs in the bioink.
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3

Synthesis and Characterization of Optimized DNA Nanoparticles

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Endotoxin free codon-optimized pPEI-MOP-co-sgRho, pshRho-1, pshRho-2 and psh-Rho-3 were amplified by Aldevron (Fargo, ND, USA) and separately mixed with TAT-CK30PEG-Acetate (at N: P=1:2 ratio) following the earlier protocol [11 (link),20 (link),22 (link),30 (link),33 ]. All of the DNA NPs were prepared and stored in saline (Sigma, Cat. No. S8776). The DNA NPs synthesis was confirmed by an agarose gel retardation assay. The intactness of DNA after compaction with diblock polymer was evaluated using a trypsin (Sigma-Aldrich, Cat. No. T4174) digestion assay. Protection of DNA from nuclease was evaluated by a DNAse I (Invitrogen) digestion assay. The DNA NPs were characterized by high-resolution transmission electron microscopy (HR-TEM, Zeiss EM 910), dynamic light scattering (DLS) and zeta potential (Nano-ZS zeta sizer, Malvern, USA) experiments. The entire synthesis process was carried out using endotoxin-free water (HyClone™ Water, GE healthcare) and endotoxin-free systems.
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4

Antibiotics usage and DNA manipulation protocols

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Antibiotics (Gold Biotechnology) were used at the following working concentrations: carbenicillin 50 μg/mL, spectinomycin 50 μg/mL, chloramphenicol 25 μg/mL, kanamycin 50 μg/mL, tetracycline 10 μg/mL, streptomycin 50 μg/mL. HyClone water (GE Healthcare Life Sciences) was used for PCR reactions and cloning. For all other experiments, water was purified using a MilliQ purification system (Millipore). Phusion U Hot Start DNA polymerase (Thermo Fisher Scientific) was used for all PCRs. Plasmids and SPs were cloned by USER assembly21 (link). Genes were obtained as synthesized gBlock gene fragments from Integrated DNA Technologies or PCR amplified directly from E. coli genomic DNA. Plasmids were cloned and amplified using either Mach1 (Thermo Fisher Scientific) or Turbo (New England BioLabs) cells. Unless otherwise noted, plasmid or SP DNA was amplified using the Illustra Templiphi 100 Amplification Kit (GE Healthcare Life Sciences) prior to Sanger sequencing. A full list of plasmids used in this work is given in Supplementary Table 5. A full list of reagents and equipment used in this work is given in Supplementary Table 6.
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5

Antibiotics usage and DNA manipulation protocols

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Antibiotics (Gold Biotechnology) were used at the following working concentrations: carbenicillin 50 μg/mL, spectinomycin 50 μg/mL, chloramphenicol 25 μg/mL, kanamycin 50 μg/mL, tetracycline 10 μg/mL, streptomycin 50 μg/mL. HyClone water (GE Healthcare Life Sciences) was used for PCR reactions and cloning. For all other experiments, water was purified using a MilliQ purification system (Millipore). Phusion U Hot Start DNA polymerase (Thermo Fisher Scientific) was used for all PCRs. Plasmids and SPs were cloned by USER assembly21 (link). Genes were obtained as synthesized gBlock gene fragments from Integrated DNA Technologies or PCR amplified directly from E. coli genomic DNA. Plasmids were cloned and amplified using either Mach1 (Thermo Fisher Scientific) or Turbo (New England BioLabs) cells. Unless otherwise noted, plasmid or SP DNA was amplified using the Illustra Templiphi 100 Amplification Kit (GE Healthcare Life Sciences) prior to Sanger sequencing. A full list of plasmids used in this work is given in Supplementary Table 5. A full list of reagents and equipment used in this work is given in Supplementary Table 6.
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6

Synthetic Wound Fluid Preparation

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Synthetic wound fluid (SWF) comprised equal volumes of foetal bovine serum (Gibco) and peptone water (Sigma-Aldrich), (23) . Mueller-Hinton Broth (MHB) was obtained from VWR.
HyClone water (GE Healthcare) was used throughout.
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