Suggest how the researchers could have altered their targeting construct, to ensure that all of the neomycin resistant transformants would have generated the expected PCR product with the A/B primer pair.
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- TH2 cells coordinate type 2 responses to expel intestinal helminths and repair tissue injury. The immune response to helminthic worm infections in the gastrointestinal tract requires specialized mechanisms due to the fact that helminths are too large to be ingested and destroyed by phagocytes. For example, cytokines made by TH2 cells elicit responses from multiple non-hematopoietic cell types that aid in parasite expulsion. Name two of these cell types and for each of them, their response to TH2-produced cytokines.Some primitive organisms, such as invertebrates, have no lymphocytes and thus lack an adaptive immune system, but they have somecomponents of an innate immune system, including phagocytes andcertain protective proteins. What are some general features of innateimmunity that make it very valuable to organisms lacking more specific antibody- and cell-mediated responses? What are some disadvantages to having only an innate immune system?Which of the following statements is correct? There is a risk of Graft versus Host Disease in an allogeneic stem cell transplant. In an autologous stem cell transplant, stem cells are removed from, and returned to, the same patient. AML (acute myeloid leukemia) is a benign haematological disease. ALL (acute lymphocytic leukemia) originates in neutrophils.
- True or false in the intestine, IECs or innate immune cells or bohrons detect luminal perturbations. in mice, primitive macrophages continue to colonize every tissue between E10 to E12.5 without reducing their proliferation capcity and become tissue resident macophagesHyper-IgE syndrome, also known as Job’s syndrome, is an immunodeficiency disease resulting from the lack of function of a single gene (gene ‘X’). Patients with this disease are highly susceptible to infections with extracellular bacteria and fungi, most frequently including Staphylococcus aureus infections and Candida albicans infections in the skin. Analysis of the various immune cell compartments indicates that these patients have normal numbers of each cell lineage (i.e., CD4 and CD8 T cells, B cells, monocytes, dendritic cells, NK cells, granulocytes, etc.), and normal levels of IgG, IgA, and IgM antibodies, but higher than normal levels of IgE. Given this information, name a likely component of the immune response that could be impaired in these patients.picture 1 shows the directed migration of two immune cell types, neutrophils (red) and macrophages (green) to a laser-induced injury in the ear of a mouse. As you can observe from the video, there are three stages to this process: 1) an initial phase characterized by fast recruitment of neutrophils (red) to the site of injury followed by 2) the slower recruitment of macrophages after which 3) the interaction between both cell types is stabilized. Recruitment to the injury site is mediated by leukotriene B4 (LTB4), a potent immune signaling molecule (Figure 1A). LTB4 binds to BLT1, a G-protein coupled receptor (GPCR), activating various signaling pathways and resulting in immune cell migration to the site of injury (Figure 1B). With this background information and your knowledge of cell and molecular biology, describe in detail in your own words, as many molecular processes as you can identify that must take place for the cell migration process depicted in the video to be achieved. For…
- The effector mechanisms that are recruited to clear an infection depend on the infectious agent. In addition to producing distinct innate responses locally at the site of infection, the different cytokines produced during type I, type 2, or type 3 immune responses also induce distinct adaptive immune responses that are tailored to the eradication of the three different classes of pathogens. One example is the production of different classes of antibodies during type I, type 2, or type 3 responses. Which step during the induction of the adaptive immune response is the key to generating and coordinating the three different immune modules?Why is it that Rh incompatibility can be a serious problem when anRh-negative mother is carrying an Rh-positive fetus, but ABOincompatibility between mother and fetus is usually no problem?That is, a type A mother can usually safely carry a type B fetus.(Hint: The antibodies produced by an Rh-negative mother againstthe Rh antigen are usually IgG, whereas the antibodies producedagainst the A or B antigens are IgM.) Because the Rh antigenobviously serves no vital function (most humans lack it), why do youthink it hasn’t been completely eliminated during human evolution?There is a variety of organs routinely transplanted in clinical medicine. Knowing that organ transplantation is routinely performed in clinic answer the following: What is a significance of HLA-typing used to match with the most suitable recipient? What has been achieved by using powerful immunosuppressive drugs?
- Organ Transplants Must Be Immunologically In the human HLA system there are 23 HLA-A alleles, 47 for HLA-B, 8 for HLA-C, 14 for HLA-DR, 3 for HLA-DQ, and 6 for HLA-DP. How many different human HLA genotypes are possible?In addition to phagocytosis, neutrophils use a process called NETs. Which one of the following describes this process? Group of answer choices A. NETs is a neutrophil process that activates the complement system of proteins, which destroys pathogens. B. A net-like structure of DNA, histones, lactoferrins, gelatinase, cathepsin G, and myeloperoxidase is secreted at pathogens. Together these chemicals destroy pathogens. C. NETs works when neutrophils secrete major basic proteins onto pathogens, destroying the pathogens' cell membranes. D. NETs are chemicals secreted by neutrophils that trigger the rapid maturation of lymphoid stem cells into lymphocytes.Which of the followings is molecular pathology associated with ADA mutations that cause immunodeficiency? a) accumulation of deoxyadenosine and its precursors S-adenosylhomocysteine and deoxyadenosine triphosphate (dATP) with toxic effects on immature lymphocytes, b)accumulation of deoxyguanosine and deoxyguanosine triphosphate, with toxic effects on immature lymphocytes