scholarly journals Degradation profile of synthetic coral scaffold in cell culture media

2018 ◽  
Vol 1 ◽  
pp. 00002
Author(s):  
Erlina Sih Mahanani ◽  
Dwi Rizki Lestari
Keyword(s):  
Cell Culture ◽  
Incubation Time ◽  
Culture Media ◽  
In Vitro Study ◽  
Ph Measurement ◽  
Phenol Red ◽  
Cell Culture Media ◽  
Significant Difference ◽  
Coral Scaffold

<p>The scaffold is one of the factors in tissue engineering that determine the success of bone regeneration. The important characteristic of the scaffold is able to degrade gradually. In vitro study using cells, the scaffold will be exposed to culture media. Therefore, degradation profile for scaffold needs to be examined. This study aims to investigate the degradation profile of synthetic coral scaffold in cell culture media using pH measurement. The method used the synthetic coral scaffolds were prepared from denaturalized collagen (gelatin) and calcium carbonate (calcite) with a concentration of 5:5 and 4:6 weight % in aqua dest. The scaffold<span lang="IN" style="">s</span> were fabricated in membrane thick film which was then physically crosslinked.&nbsp; <span lang="IN" style="">The </span>10 % <span lang="IN" style="">of gelatin scaffold was used as a control.</span>&nbsp; The scaffolds were incubated in cell culture media (non-phenol red Dulbecco’s Modified Eagle Medium) for 1 until 8 days, and pH changes of the medium were measured. As the result, Profile of degradation on day 1 to day 4 showed the 5:5 scaffold had the smallest degradation. The results indicated the significant different between scaffold concentration in day 1 (p=0.005), 5th(p=0.03), and 6th day (p=0.011). At the end of incubated days, the pH changed but not significantly different. LSD showed the significant differences between scaffold (5:5 and 4:6) with control and no significant difference between 2 concentrations of the scaffold. The conclusion of this study is the synthetic coral scaffold degraded gradually until the end incubation time and between concentration had different degradation profile in the early incubation time using pH measurement.<br></p>

scholarly journals Impact of serum in cell culture media on in vitro lactate dehydrogenase (LDH) release determination

2017 ◽  
Vol 3 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Bernhard Hiebl ◽  
Sinem Peters ◽  
Ole Gemeinhardt ◽  
Stefan M. Niehues ◽  
Friedrich Jung
Keyword(s):  
Cell Culture ◽  
Lactate Dehydrogenase ◽  
Culture Media ◽  
Cell Culture Media ◽  
Ldh Release

Resorption Mechanism of Hydroxyapatite and β-Tricalcium Phosphate Coating Layer

2008 ◽  
Vol 396-398 ◽  
pp. 81-84 ◽  
Author(s):  
Kang Sik Lee ◽  
Jae Suk Chang ◽  
Jung Hwa Kim ◽  
Chang Kuk You ◽  
Hoon Kwon ◽  
...  
Keyword(s):  
Tricalcium Phosphate ◽  
Coating Layer ◽  
Culture Media ◽  
In Vitro Study ◽  
Cell Culture Media ◽  
Beta Tricalcium Phosphate ◽  
Ha Coating ◽  
Coating Method ◽  
Coating Layers

Beta-tricalcium phosphate(β-TCP) coating layer is known to be resorbed much faster than hydroxyapatite(HA), however, there has been no report to explain the exact reason of these results. Eighty titanium discs, coated with HA(n=40) or β-TCP(n=40) by dip and spin coating method, were divided into 2 subgroups respectively; Dissolution(D, n=20) and osteoclast culture(C, n=20). The coated discs in D group were immersed in the cell culture media for 5 days, whereas, in C group, osteoclasts were seeded on the specimens and cultured for 5 days. After simple dissolution test, β-TCP coating layer showed much more cracks and denudation as compared to HA. In osteoclast culture group, mean area fraction of resorption pits in HA-C group was 11.62%, which was significantly higher than that of 0.73% in β-TCP-C group(p=0.001). In conclusion, the resorption mechanisms of HA and β-TCP coating layers were different each other in vitro study. The coated β-TCP was degraded mainly by dissolution and separation from implant, on the other hand, the HA coating layer was resorbed by osteoclastic activity.

Trypanosoma musculi: In vitro cultivation of blood forms in cell culture media

1977 ◽  
Vol 7 (2) ◽  
pp. 109-111 ◽  
Author(s):  
P. Viens ◽  
M.C. Lajeunesse ◽  
R. Richards ◽  
G.A.T. Targett
Keyword(s):  
Cell Culture ◽  
Culture Media ◽  
In Vitro Cultivation ◽  
Cell Culture Media

Colorimetric pH measurement of animal cell culture media

2010 ◽  
Vol 32 (11) ◽  
pp. 1599-1607 ◽  
Author(s):  
Juno Jang ◽  
Soo-Jin Moon ◽  
Sung-Hwan Hong ◽  
Ik-Hwan Kim
Keyword(s):  
Cell Culture ◽  
Culture Media ◽  
Animal Cell ◽  
Animal Cell Culture ◽  
Ph Measurement ◽  
Cell Culture Media

scholarly journals COMPARISON OF THE AMOUNT OF APICAL EXTRUSION OF BACTERIA FOLLOWING THE USE OF DIFFERENT INSTRUMENTATION TECHNIQUES – AN IN VITRO STUDY

2011 ◽  
Vol 01 (04) ◽  
pp. 27-32
Author(s):  
Mithra N. Hegde ◽  
Snehal Thatte
Keyword(s):  
Culture Media ◽  
In Vitro Study ◽  
Control Group ◽  
Group Iii ◽  
Root Canals ◽  
Apical Extrusion ◽  
Significant Difference ◽  
Group Ii ◽  
Group 1

Abstract Objectives: The objective of this study is to compare the amount of extrusion of bacteria beyond the apical foramen after instrumentation with Crown down and Step-back techniques using a manual and engine driven nickel-titanium instruments Materials and Methods: Seventy-five mandibular premolars with similar dimensions were used for the study. Access cavities prepared and root canals contaminated with a suspension of Enterococcus faecalis. The contaminated teeth were then divided into three experimental groups. Group 1(Crowndown group) divided into two: Group 1–A Hand files: root canals were instrumented using K-files and Group 1B – Rotary files: root canals were instrumented using ProTaper instruments. Group II (Step-back group) divided into two: Group II A– Hand files: root canals were instrumented using K-files and group II B–Rotary files: the root canals were instrumented using Light Speed LSX instruments. Group III (control group): no instrumentation was done.Bacteria were extruded after preparation were collected into vials, microbiological samples were incubated in culture media for 24hrs. The CFUs were determined for each sample. The data obtained was analyzed using the Kruskal-Wallis one way analysis of variance and Mann-Whitney U-tests. Result: There was a significant difference in the amount of bacteria extruded by both Crowndown and Step-back. The Step- back hand method extruded significantly more bacteria when compared with Crowndown hand technique. Conclusion: All instrumentation techniques extruded intracanal bacteria apically. There was a significant difference in both the engine driven instrumentation techniques, while the hand instrumentation by Step-back extruded more bacteria.

Evidence for a Metabolic Stem Cell Niche.

Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 4046-4046 ◽  
Author(s):  
Michael Cross ◽  
Rudiger Alt ◽  
Lydia Schnapke-Hille ◽  
Thomas Riemer ◽  
Dietger Niederwieser
Keyword(s):  
Stem Cells ◽  
Cell Culture ◽  
Stem Cell ◽  
Stem Cell Niche ◽  
Culture Media ◽  
Self Renewal ◽  
Cell Culture Media ◽  
Hematopoietic Stem ◽  
Cell Niche

Abstract The hematopoietic stem cell niche presents a localised environment supporting the balanced maintenance, self-renewal and occasional expansion of the stem cell pool. These options are widely assumed to be regulated exclusively by signalling from specific combinations of stroma-bound or soluble ligands. However, a consideration of the rare conditions under which absolute numbers of stem cells increase in vivo as well as the selective pressures acting on regenerative systems during evolution has led us to propose a metabolic component to the stem cell niche which serves to limit cumulative damage, to avoid the selection of potentially oncogenic mutations and to tie symmetric division to slow proliferation. This would mean that traditional cell culture media based on “systemic” substrates such as glucose and glutamine may actively prevent the symmetric amplification of high quality stem cells, offering a possible explanation for the limited success in this area to date. To investigate this possibility, we have examined the effects of range of carbon and energy sources on the proliferation and maintenance of stem and progenitor cells. Our strategy is to screen a wide variety of culture conditions using murine FDCPmix cells, which are non-tumorigenic but have an innate tendency to amplify symmetrically in the presence of IL-3, and then to test key observations in human UCB CD133+ cells provided with SCF, TPO and FLT-3L. In both cell systems, we do indeed find an unusually low requirement for the systemic substrates glucose and glutamine normally included as major energy and carbon sources in cell culture media. Reducing glucose reduces the yield of committed cells from CD133+ cultures without affecting the accumulation of CD133+CD34+cKit+ progenitors. When provided with alternative substrates more likely to reflect a “niche” type environment, FDCPmix cells can be maintained for long periods in media containing only the trace levels of glucose or glutamine derived from dialysed serum, and show improved self-renewal under these conditions. We have also found that raising osmolarity reduces glucose dependence and simultaneously favours the maintenance both of self-renewing CFU (FDCPmix culture) and of CAFCweek13 (CD133+ culture). In parallel, the use of NMR and mass spectrometry techniques to profile intracellular metabolites in self-renewing and differentiating FDCPmix cells reveals a shift in the metabolite balance indicating reduced glycolysis in the early cells. Taken together, these results suggest that hematopoietic stem cells do indeed have remarkable metabolic characteristics consistent with adaptation to a metabolically limiting niche environment. It may therefore be necessary to identify niche substrates and to combine these with the relevant signalling environment in vitro in order to effectively increase stem cell numbers for research, stem cell transplantation and tissue engineering applications.

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