Surprisingly, humans as well as mice deficient in the complement protein, C3, have greatly reduced antibody responses to T cell-dependent antigens, and are impaired in their ability to control HSV infections. When C3-deficient mice are infected with HSV, once at day 0 and then a second time 4 weeks later, their antibody response is altered compared to wild-type mice, as shown in the figure #3 below. a) What is a likely explanation for the altered antibody response in the absence of complement C3? For fugure #4: For this experiment, mice are infected with varying doses of the HSV-rd virus, and peak IgG responses to the viral surface glycoproteins are measured. The results are shown in the fugure #4. b) What is the most likely explanation for these data? Do these results impact your answer to the part above (a)? Explain your reasoning.
Surprisingly, humans as well as mice deficient in the complement protein, C3, have greatly reduced antibody responses to T cell-dependent antigens, and are impaired in their ability to control HSV infections. When C3-deficient mice are infected with HSV, once at day 0 and then a second time 4 weeks later, their antibody response is altered compared to wild-type mice, as shown in the figure #3 below. a) What is a likely explanation for the altered antibody response in the absence of complement C3? For fugure #4: For this experiment, mice are infected with varying doses of the HSV-rd virus, and peak IgG responses to the viral surface glycoproteins are measured. The results are shown in the fugure #4. b) What is the most likely explanation for these data? Do these results impact your answer to the part above (a)? Explain your reasoning.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Surprisingly, humans as well as mice deficient in the complement protein, C3, have greatly reduced antibody responses to T cell-dependent antigens, and are impaired in their ability to control HSV infections. When C3-deficient mice are infected with HSV, once at day 0 and then a second time 4 weeks later, their antibody response is altered compared to wild-type mice, as shown in the figure #3 below.
a) What is a likely explanation for the altered antibody response in the absence of complement C3?
For fugure #4: For this experiment, mice are infected with varying doses of the HSV-rd virus, and peak IgG responses to the viral surface glycoproteins are measured. The results are shown in the fugure #4.
b) What is the most likely explanation for these data? Do these results impact your answer to the part above (a)? Explain your reasoning.
Transcribed Image Text:10 -
Wild-type
102
10 -
10°-
C3+
1 2 3 4
5 6 i
8
Weeks
post-
vaccination
Primary
infection
Secondary
infection
Anti-HSV IgG Ab (µg/ml)
Transcribed Image Text:Wild-type
C3--
10°-
102-
10'
100.
105
10
HSV-rd (PFU inoculated)
101
10
10°
101
Anti-HSV IgG Ab (ug/ml)
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