PMID: 1205414Jan 1, 1975Paper

Effect of hydroxyurea on the protein content and synthesis in normal and tumorous tobacco tissues cultured in vitro

Folia Histochemica Et Cytochemica
A Bilecka

Abstract

An over 9 per cent increase was found in the protein content of callus and tumorous tissues of Nicotiana tabacum cultured for 39 days in a medium with an addition of hydroxyurea at a concentration of 100 mg/l. The inhibitory effect of this compound on incorporation of [14C]leucine was demonstrated, differences in the intensity of labelling between the nucleus and cytoplasm being present only in the tumorous tissue. These differences may indicate either disturbances in the migration of proteins from cytoplasm to nuclei or a specific blockade of histone synthesis. Hydroxyurea inhibits incorporation of [3H]arginine in callus tissues, whereas in tumorous tissues, apart from inhibition (at 75 and 100 mg HU/1), the stimulation of incorporation of this amino acid was observed (at 10 and 50 mg HU/1). The inhibitory effect of hydroxyurea on incorporation of [3H] lysine was demonstrated in both tissues examined, but it was stronger in the callus tissue. On the basis of the results concerning the influence of hydroxyurea on the content and synthesis of nucleic acids [4, 5] and the results of the present study it may be supposed that this compound induces unbalanced growth of cells of both tissues (inhibition of DNA and RNA synthesis and s...Continue Reading

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.