scholarly journals Fluorouracil synchronization of human lymphocyte cultures. Induction of high resolution R-banding by simultaneous in vitro exposure to 5-bromodeoxyuridine/Hoechst 33258

Hereditas ◽  
2008 ◽  
Vol 101 (2) ◽  
pp. 205-208 ◽  
Author(s):  
MOGENS RØNNE
1985 ◽  
Vol 27 (5) ◽  
pp. 622-625 ◽  
Author(s):  
M. De Braekeleer ◽  
Marylinne Keushnig ◽  
C. C. Lin

A simple technique for synchronization of human lymphocyte cultures with fluorodeoxyuridine (FudR) is presented. The S-phase block induced by the FudR is released by simultaneous exposure to 5-bromodeoxyuridine (BrdU) and Hoechst 33258 or by thymidine and Hoechst 33258. This method provides a high mitotic index with high percentage of prometaphase chromosomes. This simple method is highly advantageous and easy to utilize in clinical cytogenetics.Key words: fluorodeoxyuridine, high-resolution human chromosomes, cell synchronization, banding.


1989 ◽  
Vol 16 (3) ◽  
pp. 293-296
Author(s):  
Metter Tingleff Skaanild ◽  
Jørgen Clausen

The acute toxicities of selected drugs were assayed biochemically in vitro by estimation of LC50 dose in human lymphocyte cultures. Two methods were compared for estimation of LC50 values, the redistribution of DNA and lactate dehydrogenase after treatment with various concentrations of the compound. Ten of the chemicals used had previously been tested in HeLa cells using morphological changes as the endpoint. The LC50 values found in this study were a little lower than the IC50 values for HeLa cells. The enzyme assay gave lower LC50 values than the DNA assay, but the differences were not significant. LC50 values were also found for two drugs tested in several cell lines with redistribution of DNA and proteins. Again, no significant differences were apparent.


2018 ◽  
Vol 2 (1) ◽  
pp. 25 ◽  
Author(s):  
Anja Haverić ◽  
Jasmina Čakar ◽  
Maida Hadžić ◽  
Sanin Haverić

Micromeria pulegium (Rochel) Benth. is an endemic species of Lamiacea family that includes frequently used plants in culinary and folk medicine. As cytotoxic potential of some species of Micromeria genus has been confirmed, this study aimed to test unknown antiproliferative and genotoxic potential of M. pulegium, endemic bh species, aqueous leaf extract in normal (human lymphocytes) and cancer (human melanoma GR-M) cells in order to protect small populations of native M. pulegium populations or promote its controlled micropropagation or cultivation. Cytokinesis-block micronucleus cytome assay was applied for human lymphocyte cultures, while trypan blue exclusion assay was used for evaluation of cytotoxicity in human GR-M melanoma cells. Results demonstrate no genotoxic effects up to concentration of 0.2 mg/ml in human lymphocyte in vitro but significant reduction of cell viability in human GR-M melanoma cell line cultures treated with 0.3 mg/ml of Micromeria extract.


1984 ◽  
Vol 3 (5) ◽  
pp. 373-382 ◽  
Author(s):  
Madhuri Jaju ◽  
Manjula Jaju ◽  
Y.R. Ahuja

1 Genetic effects of the drugs, isoniazid and thiacetazone used for antituberculosis chemotherapy were investigated on human lymphocyte chromosomes in vitro and in vivo. 2. Therapeutic concentrations of these drugs did not induce chromosome aberrations in vitro both in combination and individually during any of the treatment period in 72 h lymphocyte cultures. At higher concentrations both the drugs were found to be cytotoxic. 3 The frequency of chromosome damage was increased significantly in first-division metaphases of the patients, i.e. in vivo during treatment with isoniazid (300 mg) + thiacetazone (150 mg); this could be due to the synergistic action between the metabolites of the two drugs in the body or due to the metabolites of thiacetazone since isoniazid was found to be nonclastogenic in vivo. 4 The frequency of sister chromatid exchanges was not increased in any of the patients except in one, who probably had a higher baseline level. These results suggest that chromosome aberrations and sister chromatid exchanges represent two different lesions. 5 Chromosome damage induced by drugs could lead to congenital malformations, cancer, ageing and therefore contributes to the overall toxicology of the drugs and hazard to human genetic health. Hence drugs like isoniazid and thiacetazone which induce chromosome damage, should be used with caution.


1976 ◽  
Vol 25 (2) ◽  
pp. 178-188 ◽  
Author(s):  
J.H. Morse ◽  
G. Stearns ◽  
J. Arden ◽  
G.M. Agosto ◽  
R.E. Canfield

Author(s):  
M. Kinan Aljaja ◽  
Adawia Kitaz ◽  
Raghda Lahdo

Background: Onopordum carduiforme, Centaurea verutum, and Achillea santolina are medicinal plants grown in Syria and commonly used in traditional medicine. Such as antibacterial, antioxidant and anticancer properties. However, the genotoxic effects of these plants have not been studied. Aim and objective: the aim of this study was to evaluate the genotoxic effects of hydroethanolic extracts of these plants on human lymphocyte cultures model by evaluating the cell proliferation, determination of mitotic index (MI), and their effects on chromosomes. Methods: the hydroethanolic extracts of the aerial parts of the three plants were extracted using an Ultrasonic bath. Then the genotoxic effects of hydroethanolic extracts of these plants on human lymphocyte cultures was conducting by determination of mitotic index (MI). Results: the results showed that all three plants decreased non-significantly the mean of mitotic index in comparison with negative control (normal MI) (p>0.05) at concentrations (1, 3, 5 mg/ml) and the mitotic index values ranged was between (2.25±0.07 and 3.3±0.28). However, C. verutum showed the lowest mitotic index (3±0.14 at 1 mg/ml) and (2.25±0.07 at 5 mg/ml), and did not induce chromatid or chromosome breaks or gaps. Conclusion: these preliminary results on cytotoxicity and mutagenicity of these plants provide valuable information about the safety of using them in alternative medicine.                    Peer Review History: Received: 11 November 2021; Revised: 13 December; Accepted: 28 December, Available online: 15 January 2022 Academic Editor:  Dr. A.A. Mgbahurike, University of Port Harcourt, Nigeria, [email protected] UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency.  Received file:                Reviewer's Comments: Average Peer review marks at initial stage: 6.0/10 Average Peer review marks at publication stage: 7.0/10 Reviewers: Ahmad Najib, Universitas Muslim Indonesia, Makassar, Indonesia, [email protected] Dr. Dennis Amaechi, MrsFoluBabade Mini Estate , Flat 5 by Old Soldiers Quarter, Sabongari/Bwari, Abuja- Federal Capital Territory, Nigeria. [email protected]  Dr. Sangeetha Arullappan, Universiti Tunku Abdul Rahman, Malaysia, [email protected] Similar Articles: A STUDY ON DIFFERENT PLANTS OF APOCYNACEAE FAMILY AND THEIR MEDICINAL USES STUDY LITERATION OF CHEMICAL CONTENTS OF SOME PLANTS THAT POTENTIALLY AS THE SOLAR SOWS EXPLORING THE ANTIPARASITIC ACTIVITY OF MEDICINAL PLANTS


Sign in / Sign up

Export Citation Format

Share Document