Home > Stem Cell Problems > Immunological Challenges for Stem Cells

Immunological Challenges for Stem Cells

Author: Ian Murnaghan BSc (hons), MSc - Updated: 30 November 2012 | commentsComment
 
Stem Cells Immunity Immune System

Stem cells carry a vast potential for treating disease but they also come with hurdles that must be overcome to ensure their success and viability for treating disease. One challenging area is that involving a patient's immune system. The challenges are also unusual because they mostly pertain to embryonic stem cells whereas adult stem cells can actually alleviate immunological challenges that tend to accompany embryonic stem cells. It's important to understand what exactly happens during immune rejection before looking at the different immunological consequences from use of embryonic stem cells.

What Is Immune Rejection?

Immune rejection is a complication that may occur with stem cell transplantation. When it occurs the immune system of a person sees the transplanted cells as 'foreign' and thus begins a fast and possibly aggressive response to attack those cells that are not recognized as 'self.' During a chronic rejection response, the attack is:

  • Milder
  • Occurring over a longer time period

In the case of acute rejection, the attack is:

  • Aggressive/strong
  • Immediate

Whether a rejection is acute or chronic, the ultimate consequence is that the patient's body rejects the stem cells.

How Do Embryonic Stem Cells Trigger An Immune Reaction?

Embryonic stem cells hold enormous potential and benefit for treating disease because they have the ability to differentiate into virtually any tissue in the human body. This means that if scientists can learn to successfully and safely control and regulate their growth, the unspecialised embryonic stem cells can be coaxed to differentiate into specialised cells for almost any tissue in a patient's body. The problem is that the transplanted cells will likely be recognised as foreign and a person's immune system will reject the potentially life saving treatment.

Immunosuppressive Drugs

By utilising treatment with immunosuppressive drugs, the reaction can be reduced but if the response is already mounted, the drugs will not eliminate the body's attack. A problem with immunosuppressive drugs, however, is that they essentially wipe out a patient's immune system and thus, leave the patient highly vulnerable to infection. Any microscopic diseases in the stem cells or surrounding environment can more easily harm the patient.

Nuclear Transfer

Nuclear transfer is a newer, potentially promising approach to combating an immune reaction sparked by embryonic stem cells. It replaces the DNA of embryonic stem cells with a patient's DNA, rendering the new and healthy stem cells, 'self.' Additional research is still required to make this a regularly used viable procedure, but it does appear to hold great potential for overcoming the immunological challenges of embryonic stem cell therapy.

Using Adult Stem Cells

Adult stem cells offer a way to overcome the immunological challenges associated with embryonic stem cells. The approach to avoid an immune rejection is to provide a perfect match between a donor and recipient. If the match is similar, a person may still need to remain on immunosuppressive drugs for a lifetime to prevent rejection. Adult stem cells utilise a person's own cells, which are isolated from tissues, triggered to multiply in culture, and then transplanted back into the patient. This type of therapy thus avoids the immunological challenges of embryonic stem cell therapy although adult stem cells do not multiply as readily in comparison with embryonic stem cells.

The immunological challenges of stem cell therapy are important to address because they are capable of rendering stem cell treatment useless. Research into new therapies to prevent rejection will hopefully allow patients with serious diseases to benefit from stem cell therapies.

You might also like...
Leave a Comment, Ask for Advice or Share Your Story...
Thanks a lot! This summery has been incredibly useful, as a high school student, I find it easy to read and knowledgeable. Thanks again for the great work!
Smurf - 30-Nov-12 @ 5:39 PM
Why nothing on ips cells? Its not very comprhensive. I really want to know and umderstand about niches and I don't like the word may. Anyone can speculate cancer. I want to know what the limitations are for a stem cell to intergrate and differentiate. Does it receive the cytokines it needs in an aged enviroment?Upon differentiation are there epigenetic constants that are expressed to give us some idea of what kind of control we have? What evidence is there of any risk of cancer?
Ashley - 5-Jul-12 @ 6:20 AM
Leave a Comment, Ask for Advice or Share Your Story...
Title:
(never shown)
Firstname:
(never shown)
Surname:
(never shown)
Email:
(never shown)
Nickname:
(shown)
Comment:
Validate:
Enter word:
Latest Comments
  • CATHY
    Re: Fighting Infection With Stem Cells
    I am not a medical person. I had an aspiration and surgery in Sept. to release bacteria from an abscess in my abdomen. As…
    31 October 2014
  • JohnJ
    Re: Turning Stem Cells Into Sperm
    @Abdo, it is still very early days in terms of research, so side effects are not really known. Even though leaps and bounds have…
    31 October 2014
  • abdo
    Re: Turning Stem Cells Into Sperm
    hi ,, iam 36 year old married since 3yrs ,,, i have bilateral undescends testis not operated ,,, i discover it after marriage,,,…
    30 October 2014
  • ExploreStemCells
    Re: Stem Cells to Treat Blindness
    @Jim - I don't know if the trials listed on this website are necessarily stem cells trials (you'd have to look into it). However,…
    30 October 2014
  • fishy
    Re: New Harvesting Techniques
    Wow this is extremely useful! I definitely hope that the research is continued as there could be so many possibilities from this!
    30 October 2014
  • Jim
    Re: Stem Cells to Treat Blindness
    I have two uncles who both suffer from macular degeneration. I understand there are stem cell transplant trials going on. How do…
    30 October 2014
  • JohnJ
    Re: Stem Cells to Treat Blindness
    @akki - This is still very early days and although it looks very encouraging doctors and researchers are still doing trials. The…
    28 October 2014
  • gilbert19trail
    Re: Why are Stem Cells Important?
    Stem cells represent an exciting area in medicine because of their potential to regenerate and repair damaged tissue. Some…
    27 October 2014
  • akki
    Re: Stem Cells to Treat Blindness
    Hello dr. My mother is 78 year old and she is suffering from glaucoma. Our dr. tells us the optic nerve was damaged is any hope…
    27 October 2014
  • girish
    Re: Stem Cells to Treat Blindness
    Is stem cell therapy useful in wet ARMD cases
    25 October 2014
Further Reading...
Our Most Popular...
Add to my Yahoo!
Add to Google
Stumble this
Add to Twitter
Add To Facebook
RSS feed
You should seek independent professional advice before acting upon any information on the ExploreStemCells website. Please read our Disclaimer.