What is the 'graft-versus-leukemia' effect in the context of hematopoietic stem cell transplantation?

Correct answer: A beneficial effect where donor T cells recognize and kill the recipient's leukemic cells.

Explanation

This question assesses the understanding of the graft-versus-leukemia effect, a crucial therapeutic component of HSC transplantation for cancer, where the donor immune system helps eliminate residual malignancy.

Other questions

Question 1

What is the approximate prevalence of psoriasis in the population, as indicated in Figure 15.1?

Question 2

What is the primary function of the AIRE (autoimmune regulator) gene within the thymus?

Question 3

Which autoimmune disease is characterized by autoantibodies against desmogleins, leading to severe blistering of the skin and mucous membranes?

Question 4

In the context of transplantation immunology, what is the correct term for a graft between genetically non-identical individuals of the same species?

Question 5

What is the typical timeframe for a first-set acute rejection of a skin graft that is mismatched at the Major Histocompatibility Complex (MHC)?

Question 6

The transfer of which of the following from a patient with myasthenia gravis is capable of transmitting disease symptoms to a recipient animal?

Question 7

Which of the following best describes the mechanism of hyperacute graft rejection?

Question 8

In the autoimmune disease Type 1 diabetes, what is the primary target of the destructive immune response?

Question 9

Autoimmune lymphoproliferative syndrome (ALPS), a systemic autoimmune condition, is a monogenic disease caused by mutations in the gene that encodes which molecule?

Question 10

What is a key feature of the placental trophoblast that helps prevent maternal immune rejection of the fetus?

Question 11

How is the autoimmune disease Hashimoto's thyroiditis primarily classified?

Question 12

What is the mechanism by which a newborn infant can temporarily exhibit symptoms of Graves' disease if the mother has the condition?

Question 13

In the pathogenesis of systemic lupus erythematosus (SLE), what is a primary role of B cells besides secreting pathogenic autoantibodies?

Question 14

What is the primary mechanism of muscle weakness in myasthenia gravis?

Question 15

The autoantibodies in Goodpasture's syndrome target which specific molecule, leading to inflammatory injury?

Question 16

According to the table in Figure 15.37, what is the approximate relative risk of developing ankylosing spondylitis for individuals carrying the HLA-B27 allele?

Question 17

Based on the data in Figure 15.37, what is the approximate female-to-male sex ratio for Systemic lupus erythematosus (SLE)?

Question 18

Defects in which of these genes are the primary cause of Autoimmune Polyendocrinopathy-Candidiasis-Ectodermal Dystrophy (APECED)?

Question 19

Which HLA class II allele is noted for providing dominant protection against the development of type 1 diabetes?

Question 20

What is the phenomenon called when the immune response, initially targeting a single epitope of an autoantigen, expands over time to recognize other epitopes on the same or different autoantigens?

Question 21

Which of the following describes the 'direct pathway' of allorecognition in graft rejection?

Question 22

Graft-versus-host disease (GVHD) is a major complication primarily associated with which type of transplantation?

Question 23

What is the role of the enzyme indoleamine 2,3-dioxygenase (IDO) at the maternal-fetal interface?

Question 24

The development of rheumatoid arthritis is strongly associated with the post-translational modification of which amino acid into citrulline?

Question 25

Which genetic locus is most consistently associated with susceptibility to a wide range of autoimmune diseases, including type 1 diabetes, rheumatoid arthritis, and multiple sclerosis?

Question 26

In the context of autoimmunity, what are peptides derived from polymorphic cellular proteins that differ between a transplant donor and recipient called?

Question 27

What is the primary role of regulatory T cells (Treg cells) in preventing autoimmunity?

Question 28

What is a key characteristic of 'immunologically privileged' sites like the brain and the anterior chamber of the eye?

Question 29

What is the primary pathogenic mechanism in rheumatoid arthritis (RA)?

Question 30

How can an infection potentially trigger or exacerbate an autoimmune disease?

Question 31

In multiple sclerosis, autoreactive T cells primarily target antigens associated with which of the following?

Question 32

What is the phenomenon where a foreign antigen from a pathogen shares structural similarity with a self-antigen, potentially leading to an autoimmune response?

Question 33

According to Figure 15.37, which autoimmune disease shows the greatest gender bias towards females, with a ratio of approximately 5 to 13 females for every male?

Question 34

The susceptibility to Type 1 Diabetes is most closely associated with polymorphisms at which position of the HLA-DQ-beta chain?

Question 35

Mutations in the NOD2 gene, which impair innate immune responses to gut microbiota, are strongly associated with an increased risk for which disease?

Question 36

What is the term for the accelerated rejection of a second skin graft from the same donor, which typically occurs within 6-8 days?

Question 37

What is the primary cause of chronic allograft vasculopathy, a major reason for late failure of transplanted organs?

Question 38

Which of the following is NOT considered an immunologically privileged site?

Question 40

What is the purpose of the mixed lymphocyte reaction (MLR)?

Question 41

Which of the following is NOT a mechanism contributing to peripheral tolerance?

Question 42

In systemic lupus erythematosus (SLE), defective clearance of apoptotic cells can lead to the activation of B cells that are specific for what type of autoantigen?

Question 43

What is the consequence of a genetic deficiency in the C1q component of the complement system?

Question 44

According to Figure 15.36, a knockout of the CTLA-4 gene in mice leads to what primary outcome?

Question 45

Which drug is known to induce autoantibodies similar to those found in SLE, although they are rarely pathogenic?

Question 46

What is the 'indirect pathway' of allorecognition?

Question 47

What is the primary role of the non-classical MHC molecule HLA-G, expressed on the placental trophoblast?

Question 48

According to Figure 15.1, what is the prevalence of multiple sclerosis?

Question 49

Based on the summary table in Figure 15.15, what is the primary pathogenic role of T cells in myasthenia gravis?

Question 50

What is the key difference between Crohn's disease and classic autoimmune diseases like SLE or rheumatoid arthritis, as described in the chapter?