3
RUDN University biologist found that Chinese date improves the immune system of fish

RUDN University biologist found that Chinese date improves the immune system of fish

RUDN University biologist proved that the extract of the fruit of the Chinese date boosts immunity in carp. The addition of date juice to the diet increases the reaction of the immune system of fish to extraneous compounds.

In fisheries, antibiotics are usually used to prevent infections. However, their use leads to the emergence of strains of bacteria resistant to them. This is a potential threat not only to fish but also to humans — in case that antibiotic-resistant bacteria begin to be transmitted from person to person. Researchers are looking for alternative drugs suitable for use in ichthyology.

Morteza Yousefi, a biologist from the RUDN University, and his colleagues investigated the properties of Zizyphus (Zizyphus jujube), known as “Chinese date” and found that it can be used as an antimicrobial agent for fish.

Morteza Yousefi tested the immunostimulatory properties of this plant on carp (Cyprinus carpio). The biologists gave the fish a solution of ethanol and distilled water with Ziziphus fruit juice with a concentration of 0.25%, 0.5%, and 1%. Then they took samples from the fish mucosa and monitored how immune parameters change: the number of antibodies, the activity of enzymes — proteases and the expression of genes of signaling molecules — cytokines, which, in particular, trigger phagocytosis, that is, the destruction of bacteria.

Analysis of the data showed that carp, which were given a solution of the fetus with a concentration of 0.5%, increased the number of antibodies. The more antibodies in the blood, the more extraneous compounds — antigens — they can “catch”.

Besides, ichthyologists have found a connection between the extract of dates in the diet of fish and the presence of cytokines. The experiment showed that the concentration of the solution is 0.25% does not change the immune reactions of carp, but 0.5% and 1% solution increases the expression of cytokine genes and the activity of protease enzymes that are involved in the “digestion” of killed pathogenic bacteria and in triggering the processes of extraneous cells death (apoptosis).

The experiment showed that the juice of the Chinese date can increase the immunity of carp, which means that it can be used as an antibacterial agent in fisheries working on the principle of “green aquaculture”. The discovery of immune stimulation of the carp juice of Ziziphus fruit in the future will allow fishermen to reduce the damage from infections, without provoking the emergence of antibiotic-resistant strains of bacteria.

The results are published in the journal Fish and Shellfish Immunology.

30 Jan 2018
The conference on international arbitration, where law students from European universities simulate court proceedings and alternately defend the interests of the respondent and the orator.
667
Student's Scientific Initiatives View all
03 Nov 2017
June 22 - 26, 2017 in Barnaul, Altai State University, took place the Summer Academy of the BRICS Youth Assembly, an international event that brought together representatives of different countries
856
Similar newsletter View all
30 Dec
Biologists from RUDN University discovered the secret of flaxseed oil with long shelf life

Biologists from RUDN University working together with their colleagues from the Institute of Molecular Biology of the Russian Academy of Sciences and the Institute of Flax studied the genes that determine the fatty acid composition in flaxseed oil and identified polymorphisms in six of them. The team also found out what gene variations could extend the shelf life of flaxseed oil. This data can be used to improve the genetic selection of new flax breeds. The results were published in the BMC Plant Biology journal.

260
11 Oct
Mowing Is More Harmful to Soil Than Grazing

A team of biologists analyzed soil samples from a pasture and a regularly mowed meadow and found out that grazing lets more carbon get into the soil than mowing. This, in turn, improves the carbon cycle and makes microorganisms more efficient.

17
11 Oct
Soil scientists suggest method for remediating urban garden soils contaminated with lead and arsenic

The soils of urban gardens and vegetable patches contain a lot of toxicants (including lead and arsenic) in high concentrations which can be harmful to the health of children and people with chronic diseases. A team of soil scientists from RUDN University suggested a remediation method developed based on data collected in a garden of Brooklyn (NY, U.S.).

18
Similar newsletter View all