Alkaline comet assay results on fresh and one-year frozen whole blood in small volume without cryo-protection in a group of people with different health status

Author(s):  
Mirta Milić ◽  
Ivan Ožvald ◽  
Ivana Vinković Vrček ◽  
Marijana Vučić Lovrenčić ◽  
Višnja Oreščanin ◽  
...  
2010 ◽  
Vol 30 (9) ◽  
pp. 1297-1302
Author(s):  
Tao Zhang ◽  
Jiye Hu ◽  
Yuchao Zhang ◽  
Qianfei Zhao ◽  
Jun Ning

JS-118 is an extensively used insecticide in China. The present study investigated the genotoxic effect of JS-118 on whole blood at 24, 48, 72 and 96 h by using alkaline comet assay. Male Kunming mice were given 6.25, 12.5, 25, 50 and 100 mg/kg BW of JS-118 intraperitoneally. A statistically significant increase in all comet parameters indicating DNA damage was observed at 24 h post-treatment ( p < 0.05). A clear concentration-dependent increase of DNA damage was revealed as evident by the OTM (arbitrary units), tail length (µm) and tail DNA (%). From 48 h post-treatment, a gradual decrease in mean comet parameters was noted. By 96 h of post-treatment, the mean comet tail length reached control levels indicating repair of damaged DNA. This study on mice showed different DNA damage depending on the concentration of JS-118 and the period of treatment. The present study provided further information of the potential risk of the genetic damage caused by JS-118.


2020 ◽  
Vol 20 (3) ◽  
pp. 453-463
Author(s):  
Svetlana Yagubova ◽  
Aliy Zhanataev ◽  
Rita Ostrovskaya ◽  
Еlena Anisina ◽  
Тatiana Gudasheva ◽  
...  

Background: NGF deficiency is one of the reasons for reduced β-cells survival in diabetes. Our previous experiments revealed the ability of low-weight NGF mimetic, GK-2, to reduce hyperglycaemia in a model of advanced diabetes. The increase in DNA damage in advanced diabetes was repeatedly reported, while there were no data about DNA damage in the initial diabetes. Aim: The study aimed to establish whether DNA damage occurs in initial diabetes and whether GK-2 is able to overcome the damage. Methods: The early-stage diabetes was modelled in Balb/c mice by streptozotocin (STZ) (130 mg/kg, i.p.). GK-2 was administered at a dose of 0.5 mg/kg, i.p., subchronically. The evaluation of DNA damage was performed using the alkaline comet assay; the percentage of DNA in the tail (%TDNA) and the percentage of the atypical DNA comets (“ghost cells”) were determined. Results: STZ at this subthreshold dose produced a slight increase in glycemia and MDA. Meanwhile, pronounced DNA damage was observed, concerning mostly the percentage of “ghost cells” in the pancreas, the liver and kidneys. GK-2 attenuated the degree of hyperglycaemia and reduced the % of “ghost cells” and %TDNA in all the organs examined; this effect continued after discontinuation of the therapy. Conclusion: Early-stage diabetes is accompanied by DNA damage, manifested by the increase of “ghost cells” percentage. The severity of these changes significantly exceeds the degree of hyperglycaemia and MDA accumulation. GK-2 exerts an antihyperglycaemic effect and attenuates the degree of DNA damage. Our results indicate that the comet assay is a highly informative method for search of antidiabetic medicines.


1971 ◽  
Vol 17 ◽  
pp. 303-326 ◽  

Edward Armand Guggenheim was born on 11 August 1901 in Manchester; he was the elder brother of a family of three. His father, Armand Guggenheim, was of Swiss nationality but became a naturalized British subject at the age of forty-six in 1906. He was the senior partner in E. Spinner & Co., importers of Indian cotton and exporters of cotton cloth, especially khaki, and during the years 1917-1923 was also the Swiss Consul in Manchester. Edward after attending Terra Nova School, Birkdale, Southport, proceeded at the age of fourteen with a Junior Scholarship to Charterhouse. At first he was on the classical side but he switched to the science side where he came under the influence of two outstanding mathematics teachers, C. O. Tuckey and Alfred Lodge who was the brother of the more famous Oliver Lodge. His high intellectual qualities developed rapidly at Charterhouse, where he gained a Senior Scholarship in 1917 and was top of the sixth form in mathematical sciences for the period 1918-1920. His strong character and desire for authority were recognized by his election to the Head of House during his last year at School. Edward’s father died at the early age of 63, but his mother lived much longer and was an admirable hostess to Edward’s friends. After declining an Exhibition in the previous year, Edward won a Scholarship from Charterhouse to Cambridge University at Gonville and Caius College in 1920. One year later he obtained a first-class mathematical tripos in Part 1 and in 1923 a first-class in the natural science tripos, Part 2, in chemistry. One imagines that his theoretical papers were outstanding, since his practical ability at that time appears not to have been exceptionally high, particularly in preparative organic chemistry. After completion of an organic synthesis, which should have given a crystalline product, he was holding a test-tube containing a small volume of a viscous tarry material. It is reported that he contrived to collide with a perambulating demonstrator and, with studied carelessness, allowed the only record of his work to slip through his fingers with consequent breakage of the test-tube.


2014 ◽  
Vol 7 (Suppl 1) ◽  
pp. P12
Author(s):  
Avani Patel ◽  
Mihir Shah ◽  
Pinaki Patel ◽  
Trupti Patel

2007 ◽  
Vol 172 ◽  
pp. S72
Author(s):  
Ulku Undeger ◽  
Mehmet Korkmaz ◽  
Sevtap Aydin ◽  
Nursen Basaran

2003 ◽  
Vol 89 (12) ◽  
pp. 2271-2276 ◽  
Author(s):  
M A L Moneef ◽  
B T Sherwood ◽  
K J Bowman ◽  
R C Kockelbergh ◽  
R P Symonds ◽  
...  

1986 ◽  
Vol 67 (2) ◽  
pp. 131-132
Author(s):  
T. M. Shigabutdinova

There are 840 children registered at the pediatric area, including 66 children under one year of age and 140 "unorganized" children. In the course of the clinical examination, the health status of children was studied according to the data of preventive examinations, as well as materials of the district therapist on the health status of the family.


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