Ibrahim mohammad saeed shnawa, College of Biotechnology-University of Qasim, Qasim, Babylon/Iraq. Email: firstname.lastname@example.org
Ibrahim mohammad saeed shnawa (2016). The immune potentials of probiotics. Int J Vac & Im Sys. 1:1, 14-18. DOI: 10.25141/2475-6326-2016-1.0014
Probiotics are vaccine allied biologics, vaccine adjuvants ,oral vaccines ,vaccine prim-boost and, vaccine delivery systems .They are
formed from commensal bacteria and commensal yeasts .Such candidate preparation are developed and evaluated in a way similar to
that of vaccine development and evaluations with less stringent control measures . They can be of therapeutic and preventive uses both for infectious and lympho-proliferative diseases.
The concept of using bacteria for treatment and prevention as well
as health insurance is not modern but it is rooted back to 1930s of
the 20th century . However in the current days there is a renewal
of the interest of probiotic use.Probiotic technology covers the
theme of selection of strains, preparation of starters ,studying
the strain physiology and strain immune potentials well as cell
immobilization techniques .Probiotics displayed their preventive
and /or therapeutic influences through their immunogenicity,
immune-modulating as well as tumor reducing activities.The
objective of the present mini-review was to introduce probiotics as
an immune-prophylactants and immunotherapeutics
Originally ,probiotics as a term is referred to a secretory product
of a microbe that promotes the growth of the other microbe
living within the same ecologic niche Such term means in the
straight English language” For the life”.Parker in 1975
have demonstrate that probioics denoted to substances of microbe
that posses positive role in restoration of the equilibrium of the
intestinal microflora.Fuller in 1989,have been assured that
probiotics means microbes which have certain biological and
immunological determinants by which they can pass through
mouth till intestines (ceccum).
The immune-biologic features of the probiotic microbes are being
depicted in Table 1.They adhere to the intestinal and uro-genital
cells and reduce pathogens through steri- hinderence ,production
of bio-surfactants ,production of biocines and competition for
nutrients .After instillation in the intestines and vagina they persist
for three days in the intestines and seven weeks in the vagina
.Some probiotic strains resist the micro-bicides and spermicide
activities in intestines and vagina respectively.They formed
coaggregates,biofilms and overgrow other pathogens,though they
are nonpathogens.Probiotic bacteria are mainly from Lactobacilli
and bifidobacter, while probiotic yeasts are from the genera
Saccharomyces and Candida.[1,4].
MODE OF ACTION[5,6,7]
Probiotics performed their immune-biologic functions via several
immune mechanisms like;
i-Adherence and colonization of mucosal surfaces.
Ii-Competition for nutrients.
iv-Production of Organic acids
v-Co-aggregation and overgrowth
vi-Immune mechanisms like antibody responses induction of
cytokine network ,immune-adjuvant action ,tumor reducing ability
Cell immobilization techniques have pre-requests ,such prerequests
are being stated in the following;
i-Candidate Probiotics ;After the starter of the probiotic microbes
are being propagated and thoroughly evaluated using a series
of evaluation parameters then they are ready for loading to a
ii-The chemical nature of the carrier materials are hetero-geneous
including, polysaachardes ,starch ,dextran and agarose derivatives
.Alternatively ,proteins can be of use as loading carriers such as
gelatin , albumin and resins.
iii-Cell immobilization; Cell immobilization processes are,
loading, linking , entrapping of microbial probiotic cells and
iv-Entrapping; Probiotic cells are trapped inside synthetic tissues
made from gel such as polycrylamide ,K-carrageenan and calcium
alginate. Though ,calcium alginate ,carrrageenan and starch are
v-Encapsulation System; The use of starch as an encapsulation
system for probiotics will be as in the following steps;
i-Large granules are treated with enzyme to obtain porous
ii-If starch found as amylase it should be solubilized and cooled .
iii-The treated starch is of use as carrier in which probiotic
suspension derived from broth culture media is precipitated on
the surface of the starch granules to fill up the porous structures
allowing chemical and physical bounding to starch surface
iv-The final product is lyophilized to be obtained in dried form.
The capsule production in this way is known as simple precipitation
and it is most sound in use and of high efficiency for production
of coats for this stable and resistant capsules. The probiotic
starch encapsulation is resistant to action of acids ,juces and
enzymes on passage through; mouth, esophagous ,stomach and
small intestines ,when the capsule reach colon it hydrolyzed and
probiotic materials are released after grow and increase in numbers
due starch formation by the colonic bacteria and by the probiotic
Both of the small and large scale production of probiotics should
fulfills several evaluation criteria[8,9,10] which includes the
i-Reliability ,strain nature.
v-Safety., proof to be non-toxic
vi-Stability. ,genetic back ground.
vii-Immunogenicity, antibody and cytokine response.
ix- Immune Protectivity.
x-Tumor Regression Ability.
Probiotic Host Immune Responses:[11,12]
When the probiotic cell clones reached , thereby in the colon they
are taken up by M cells onto the surface lining of the Pyres patches
or across the normal epithelium overlying the lamina properia
.In pyres patches the M cells transport the intact probiotic cells
to the phagocytes to be phagocytized by the antigen presenting
cells(APC) the macrophage and dendritic cells. The APC process
and express the antigenic peptide along with MHCII molecules
onto its surface. The peptide MHC combinations on the surface of
APC ,in turn presented to T cells through helper effect will activate
B lymphocyte to grow ,proliferate, expand and then differentiated
to plasma cells. While if the probiotic antigen crosses the normal
epithelium ,it will has the potential to activate the lamina properia
T cells and induce T cell immune responses.
When the mucosal immune responses are stimulated ,primed
T and B lymphocytes migrate through lymphatic vessels ,then
entered the peripheral blood circulation via the thoracic lymph
duct. Extravasation do happened to the immune cells and then
enrolled in traffic ,migrate and homed into the common mucosal
immune system compartments ;lamina properia ,respiratory tissue
,uro-genital tissue ,mammary and salivary glands .Such migration
is referred to as an IgA cycle. Though on the contrary to the
migration and homing stories . If the probiotic cells are bounded
to epithelial cells, then they will have only local effects on the gut.
They are unable to induce IgA cycle or to increase CD4+ T cells.
Their effects only exerted through the induction of cytokine release
by the stimulated cells without the need for antigen processing.
Probiotics, during the passage through the gut ,they will raise up
S IgA, cytokine responses as well as they will induce their own
specific mucosal antibody responses of the gut .
Probiotics Versus Vaccine:
Probiotics are vaccine and vaccine allied Biologics. There are
some similarities and difference in between them.
Probiotics have been tempted in rather many therapeutic
protocols of human and animal diseases to modulate immunity
in autoimmune diseases like rheumatoid arthritis, inflammatory
bowel disease and, allergic diseases like atopic dermatitis .They,
also posses the potential of tumor growth reduction and prevention
of diarrhea and urinary tract infection. Diarrhea occur in around
20% of patients whom received antibiotic treatment. Antibiotic
associated diarrhea results from microbial imbalance that lead to
decrease in the endogenous micro-flora that is usually responsible
for colonization resistance and decrease in colonic capacity for
fermentation. It has been found that probiotic treatment restore
patient normal state in a range of 5 to 17%. Several controlled
randomized trails have shown the beneficial effects of probiotics
in therapeutic and preventive measures of gastroenteritis
patients. In a group of 116 patients with IBD were given probiotic
preparations .It was found that it is effective as that of Mesasalalin
(R) in inducing remission and preventing relapse of IBD patients .
Probiotics are responsible for about 70% of human immune
responses and anti-cancerous ability.They have antiinflammatory
influences .Probiotics posses vaccine adjuvant
effects and vaccine prime-boost potentials as well as vaccine and
vaccine delivery system as well ,Tables 3 and 4.
Finally to put-forward a concluding remarks to this mini-review
one may state the basic immune features of probiotics as in the
vii-The boost part of the prime boost protocol.
viii-Vaccine delivery System.
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