BIOTECHNOLOGICAL APPLICATIONS OF THE YEAST CELL WALL WITH EMPHASIS ON THE DEVELOPMENT OF FEED ADDITIVES

• DOI: 10.22533/at.ed.23119150417

• Palavras-chave: Atena

• Keywords: biotechnology, mycotoxin adsorbent, yeast wall cell.

• Abstract:

  The objective of the chapter was

  to give a general look at the applications that

  yeasts can and could have. Some of them are

  used as supplements in animal feed due to their

  relatively high content of proteins and amino

  acids, energy and micronutrients compared

  to common cereals and oilseed meals. It has

  been shown that whole cells, cell walls, wall

  components improve the performance and

  health of animal growth. Although, there are

  many researches that evaluate the use of yeasts

  in the p otential development and the benefits

  for human and animal health. It is necessary

  to develop biotechnological strategies such as

  the one proposed in this chapter. Four strains

  of yeasts with probiotic properties (S. boulardii

  RC009; S. cerevisiae RC012, S. cerevisiae

  VM014 and K. marxianus VM004) were tested

  to be used as adsorbents of AFB1. The use of

  waste from the bioethanol industry was studied

  as a carbon source to produce biomass and

  extract the cell wall of the yeasts. The walls were

  studied using Transmission Electron Microscopy

  and Fourier Transform Infrared, determining the

  thickness of the wall and the composition. The

  quantification of the adsorption of AFB1 using

  High Performance Liquid Chromatography was

  conducted. Increasing the thickness of yeast

  walls to be used as feed additives and mycotoxin

  adsorbents is a promising strategy to reduce

  the exposure to animals (and, consequently, to

  humans) of mycotoxins, since the capacity of

  adsorption is due to the interactions between

  the yeast wall and the mycotoxins.

• Número de páginas: 15