NatTrol Clostridium difficile

Cord blood serum harvesting by hydroxyethyl starch: a fetal bovine serum alternative in expansion of umbilical cord-derived mesenchymal stem cells

As a supplement widely used cell culture, fetal bovine serum (FBS) port of the high content of growth factors, proliferation, and adhesion. However, high cost, bio-safety, possible transmission of xenogeneic agents, restricted access, and ethical controversies major obstacle that prevents the use of these additives. Thus, new alternatives have been proposed by various pros and cons. However, caution must be taken in selecting a suitable replacement given that changes in the main aspects of cultured cells can be biased consequences of clinical applications.

Here, the authors ( Corneel Verburg) evaluated the impact of harvesting cord blood serum HES (CBS-HES), as an enriched source of growth factors, the mesenchymal stem cells basic (MSC) characteristics. In this experiment, umbilical MSCs cord-derived isolated and maintained with Dulbecco’s Modified Eagle containing either 10, 15, and 20% CBS-HES or FBSS Medium to compare their morphology, immunophenotype, growth and proliferation rate, the rate of death, cell cycle, and gene expression profiles. Despite all the media that support the expansion of MSC enriched with comparable morphology, cell surface markers, the mortality rate, c-MYC and p16 expression, and the growth rate, CBS-HES cells significantly (P <0.05) expressed more hTERT gene in concentration – a dependent manner.

However, no significant shift was observed in the cell cycle of cultured cells using the same concentration of additive, a finding that was subsequently confirmed by Ki-67 immunostaining.

CBS-HES as additives available and affordable, it seems to be optimal, it is relatively safe and promising alternative FBS for cultivation, propagation, and subsequent clinical application of MSC.

Dr. Djoumana Ounas


Keywords: alternative FBS; Fetal bovine serum; Hydroxyethyl starch; Mesenchymal stem cells; Umbilical cord.

Cord blood serum teste par NatTrol de C. Difficile
Cord blood serum harvesting by hydroxyethyl starch: a fetal bovine serum alternative in expansion of umbilical cord-derived mesenchymal stem cells

Favorable Effects of Fetal Bovine Serum in Vitro Cryosurvival of Chicken spermatozoa

chicken spermatozoa are highly susceptible to cryopreservation often requires extender containing additives to improve the quality of post-thaw them. Although the protective properties of fetal bovine serum (FBS) for freezing cells cultured tissue is widely known, its potential as a cryoprotectant for most of the sperm cells have not been explored. Thus, the goal of our research is to (i) investigate the protective effect of FBS in different concentrations (0, 5, 10, 15 and 20%) to cryodamages in spermatozoa chicken, and (ii) to test the concentration of FBS that produces the best preservation compared 1 mg / mL of cholesterol-loaded cyclodextrins (CLC).

Samples were assessed before and after freezing on sperm motility parameters, plasma and integrities acrosome membrane, mitochondrial membrane potential, oxidative stress and peroxidation plasma membrane.

Our findings show that, despite their beneficial effects on fresh spermatozoa, the higher the concentration of FBS (15 and 20%) obtained the worst results for most motility and functional parameters after thawing. Conversely, lowering the concentration of FBS (5 and 10%) improved post-thaw all variables when compared with controls. After that, based on regression analysis, the concentration of 7% FBS have to be assessed against the CLC in the experiment was prepared by four groups: control, FBS, CLC, and FBS + CLC.

FBS and FBS + CLC group exhibited higher progressive motility in fresh samples, whereas only FBS higher retained post-thaw progressive motility. In addition, the incorporation FBS extender to increase the percentage of cells that quickly and reducing the production of free radicals and peroxidation plasma membrane. Together, these results indicate that FBS minimize some of the harmful effects of cryopreservation, providing an alternative to chicken semen extenders which seems superior in many aspects CLC at 1 mg / mL.

iFluor™ 610 succinimidyl ester

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iFluor™ 546 succinimidyl ester

1048 1 mg
EUR 219

iFluor™ 568 succinimidyl ester

1049 1 mg
EUR 219

iFluor™ 450 maleimide

1057 1 mg
EUR 219

iFluor™ 647 amine

1074 1 mg
EUR 219

iFluor™ 680 amine

1076 1 mg
EUR 219

iFluor™ 700 amine

1077 1 mg
EUR 219

iFluor™ 710 amine

1078 1 mg
EUR 219

iFluor™ 750 amine

1079 1 mg
EUR 219

iFluor™ 680 hydrazide

1086 1 mg
EUR 219

iFluor™ 700 hydrazide

1087 1 mg
EUR 219

iFluor™ 750 hydrazide

1088 1 mg
EUR 219

ReadiUse™ ABTS Substrate Solution *Optimized for ELISA Assays with HRP Conjugates*

11001 1 L
EUR 202

ReadiUse™ TMB Substrate Solution *Optimized for ELISA Assays with HRP Conjugates*

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EUR 480

ReadiUse™ hydrogen peroxide solution *50 mM calibrated and stabilized solution*

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Amplite™ Blue

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EUR 176

Amplite™ IR

11009 1 mg
EUR 132

Amplite™ Red

11011 1000 Assays
EUR 132

ReadiUse™ TMB Substrate Solution *Optimized for ELISA Assays with HRP Conjugates*

11012 100 ml
EUR 115

ReadiLink™ Rapid mFluor™ Violet 420 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

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EUR 176

Luminol [3-Aminophthalhydrazide] *CAS 521-31-3*

11050 1 g
EUR 115

iFluor™ 488 tyramide

11060 1 mg
EUR 219

Azido-Cy5 tyramide

11061 1 mg
EUR 306

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ReadiLink™ Rapid mFluor™ Blue 570 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

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ReadiLink™ Rapid mFluor™ Green 620 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1123 2 Labelings
EUR 176

ReadiLink™ Rapid mFluor™ Yellow 630 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

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EUR 50

Amplite™ Colorimetric Glucose Oxidase Assay Kit

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EUR 306

ReadiLink™ Rapid mFluor™ Red 700 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

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EUR 176

Amplite™ Fluorimetric Glucose Oxidase Assay Kit *Red Fluorescence*

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EUR 219

Amplite™ Fluorimetric Myeloperoxidase Assay Kit *Red Fluorescence*

11301 200 Tests
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Amplite™ Fluorimetric Glutamate Oxidase Assay Kit *Red Fluorescence*

11302 200 Tests
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Amplite™ Fluorimetric Monoamine Oxidase Assay Kit *Red Fluorescence*

11303 200 Tests
EUR 219

Amplite™ Fluorimetric Xanthine Oxidase Assay Kit *Red Fluorescence*

11304 200 Tests
EUR 219

Amplite™ Colorimetric Superoxide Dismutase (SOD) Assay Kit

11305 200 Tests
EUR 219

Amplite™ Fluorimetric Catalase Assay Kit *Red Fluorescence*

11306 200 Tests
EUR 219

Amplite™ Colorimetric Xanthine Oxidase Assay Kit

11307 200 Tests
EUR 219

mFluor™ Violet 450 acid

1140 5 mg
EUR 219

Amplite™ Colorimetric Acetylcholinesterase Assay Kit

11400 200 Tests
EUR 219

Amplite™ Fluorimetric Acetylcholinesterase Assay Kit *Green Fluorescence*

11401 200 Tests
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Amplite™ Fluorimetric Acetylcholinesterase Assay Kit *Red Fluorescence*

11402 200 Tests
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Amplite™ Fluorimetric Acetylcholine Assay Kit *Red Fluorescence*

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1141 5 mg
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mFluor™ Blue 570 acid

1143 5 mg
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mFluor™ Green 620 acid

1144 5 mg
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mFluor™ Yellow 630 acid

1145 5 mg
EUR 50

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1146 5 mg
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mFluor™ Violet 500 SE

1149 1 mg
EUR 219

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EUR 219

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Cell Meter™ Intracellular Fluorimetric Hydrogen Peroxide Assay Kit *Blue Fluorescence*

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Cell Meter™ Intracellular Fluorimetric Hydrogen Peroxide Assay Kit *Blue Fluorescence Optimized for Flow Cytometry*

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mFluor™ Violet 510 SE

1151 1 mg
EUR 219

mFluor™ Violet 540 SE

1152 1 mg
EUR 219

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11540 1000 Tests
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mFluor™ Blue 570 SE

1160 1 mg
EUR 306

FDP [Fluorescein diphosphate, tetraammonium salt] *CAS 217305-49-2*

11600 5 mg
EUR 132

MUP, disodium salt [4-Methylumbelliferyl phosphate, disodium salt] *CAS 22919-26-2*

11610 25 mg
EUR 115

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11612 10 g
EUR 898

MUP [4-Methylumbelliferyl phosphate, free acid] *CAS 3368-04-5*

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EUR 115

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11617 5 g
EUR 480

pNPP [4-Nitrophenyl phosphate, disodium salt] *CAS 4264-83-9*

11619 25 mg
EUR 115

CF-MUP, sodium salt *Superior alternative to MUP*

11628 10 mg
EUR 50

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1165 1 mg
EUR 306

mFluor™ Yellow 630 SE

1170 1 mg
EUR 50

ADP-ribose-pNP

11700 1 mg
EUR 219

mFluor™ Red 780 SE

1191 1 mg
EUR 306

Amplite™ Colorimetric Alkaline Phosphatase Assay Kit *Yellow Color*

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Amplite™ Fluorimetric Alkaline Phosphatase Assay Kit *Blue Fluorescence*

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Amplite™ Fluorimetric Alkaline Phosphatase Assay Kit *Near Infrared Fluorescence*

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Amplite™ Luminometric Alkaline Phosphatase Assay Kit *Luminescence*

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12481 25 mg
EUR 219

Cyluc1 [(4S)-2-(6,7-Dihydro-5H-thiazolo[4,5-f]indol-2-yl)-4,5-dihydro-thiazole-4-carboxylic acid]

12482 100 mg
EUR 480

ReadiLink™ Rapid iFluor™ 750 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

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EUR 176

D-Luciferin, free acid *CAS#: 2591-17-5*

12501 25 mg
EUR 115

D-Luciferin, free acid *CAS#: 2591-17-5*

12502 100 mg
EUR 132

D-Luciferin, free acid *CAS#: 2591-17-5*

12503 1 g
EUR 528

D-Luciferin, potassium salt *CAS#: 115144-35-9*

12505 25 mg
EUR 115

D-Luciferin, potassium salt *CAS#: 115144-35-9*

12506 100 mg
EUR 132

D-Luciferin, potassium salt *CAS#: 115144-35-9*

12507 1 g
EUR 263

D-Luciferin, sodium salt *CAS#: 103404-75-7*

12509 25 mg
EUR 115

D-Luciferin, sodium salt *CAS#: 103404-75-7*

12510 100 mg
EUR 132

D-Luciferin, sodium salt *CAS#: 103404-75-7*

12511 1 g
EUR 528

D-Luciferin phosphate *CAS 145613-12-3*

12512 1 mg
EUR 219

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12513 5 mg
EUR 219

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12514 5 mg
EUR 219

D-Luciferin ethyl ester *CAS 135251-85-3*

12515 5 mg
EUR 219

D-Luciferin acetate

12516 5 mg
EUR 219

Amplite™ Luciferase Reporter Gene Assay Kit *Bright Glow*

12518 1 plate
EUR 176

Amplite™ Luciferase Reporter Gene Assay Kit *Bright Glow*

12519 10 plates
EUR 393

Amplite™ Luciferase Reporter Gene Assay Kit *Bright Glow*

12520 100 plates
EUR 2616

Amplite™ Gaussia Luciferase Reporter Gene Assay Kit *Bright Glow*

12530 1 plate
EUR 219

Amplite™ Gaussia Luciferase Reporter Gene Assay Kit *Bright Glow*

12531 10 Plates
EUR 702

Amplite™ Gaussia Luciferase Reporter Gene Assay Kit *Bright Glow*

12532 100 plates
EUR 3486

Amplite™ Renilla Luciferase Reporter Gene Assay Kit *Bright Glow*

12535 1 plate
EUR 219

Amplite™ Renilla Luciferase Reporter Gene Assay Kit *Bright Glow*

12536 10 plates
EUR 876

Amplite™ Renilla Luciferase Reporter Gene Assay Kit *Bright Glow*

12537 100 plates
EUR 3486

ReadiLink™ Rapid iFluor™ 488 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1255 2 Labelings
EUR 176

Amplite™ Colorimetric Beta-Lactamase Activity Assay Kit

12551 200 Tests
EUR 393

BG-NH2 [O6-(4-Aminomethyl-benzyl)guanine]

12560 1 mg
EUR 219

BG-NH2 [O6-(4-Aminomethyl-benzyl)guanine]

12561 5 mg
EUR 393

ReadiLink™ Rapid iFluor™ 633 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1260 2 Labelings
EUR 176

Amplite™ Fluorimetric Beta-Galactosidase Assay Kit *Green Fluorescence*

12601 500 Tests
EUR 306

Amplite™ Fluorimetric Neuraminidase Assay Kit *Blue Fluorescence*

12602 200 Tests
EUR 306

Amplite™ Fluorimetric Beta-Galactosidase Assay Kit *Red Fluorescence*

12603 200 Tests
EUR 306

Amplite™ Colorimetric Beta-Galactosidase Assay Kit

12604 200 Tests
EUR 306

HIS Lite™ Cy3 Bis NTA-Ni Complex

12610 1 mg
EUR 393

HIS Lite™ Cy5 Bis NTA-Ni Complex

12613 1 mg
EUR 393

ReadiLink™ Rapid iFluor™ 790 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1265 2 Labelings
EUR 176

ReadiLink™ Rapid Cy3 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1290 2 Labelings
EUR 176

ReadiLink™ Rapid Cy5 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1292 2 Labelings
EUR 176

ReadiLink™ Rapid Cy7 Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1294 2 Labelings
EUR 176

ReadiLink™ Rapid FITC Antibody Labeling Kit *Microscale Optimized for Labeling 50 µg Antibody Per Reaction*

1299 2 Labelings
EUR 176

ReadiLink™ Rapid trFluor™ Eu Antibody Labeling Kit *Microscale Optimized for Labeling 50 ug Antibody Per Reaction*

1300 2 Labelings
EUR 876

Benzoyl-Leu-Gly-Arg-Aminoluciferin

13000 1 mg
EUR 480

BOC-Leu-Gly-Arg-Aminoluciferin

13001 1 mg
EUR 480

BOC-Val-Pro-Arg-Aminoluciferin

13002 1 mg
EUR 480

D-VLK-AMC [D-Val-Leu-Lys-AMC]

13201 5 mg
EUR 132

Ac-DEVD-AFC *CAS 201608-14-2*

13401 5 mg
EUR 132

Ac-DEVD-AMC *CAS 169332-61-0*

13402 5 mg
EUR 132

Ac-DEVD-CHO *CAS 169332-60-9*

13403 1 mg
EUR 132

Ac-DEVD-pNA *CAS 189950-66-1*

13405 5 mg
EUR 132

Ac-IETD-AFC *CAS 211990-57-7*

13410 5 mg
EUR 219

Ac-IETD-AMC

13411 5 mg
EUR 219

Ac-IETD-CHO *CAS 191338-86-0*

13412 5 mg
EUR 219

Z-IETD-pNA *CAS 219138-21-3*

13413 5 mg
EUR 219

D-Aminoluciferin

13415 10 mg
EUR 219

Buccutite™ Rapid PE-Cy7 Tandem Antibody Labeling Kit *Microscale Optimized for Labeling 25 ug Antibody Per Reaction*

1342 2 Labelings
EUR 306

Z-DEVD-AMC

13421 5 mg
EUR 176

Z-IETD-AFC *CAS 219138-02-0*

13425 5 mg
EUR 158


Keywords: Birds; poultry; reproductive technologies; Semen analysis; Frozen sperm.

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