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Related Concept Videos

Complement System01:27

Complement System

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The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
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Extrinsic and Intrinsic Pathways of Hemostasis01:20

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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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Hormonal Regulation

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

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After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles
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Complement factor B activation in patients with preeclampsia.

Ivan Velickovic1, Mudar Dalloul2, Karen A Wong1

  • 1Department of Anesthesiology, State University of New York Downstate Medical Center, Brooklyn, NY 11203, USA.

Journal of Reproductive Immunology
|January 22, 2015
PubMed
Summary
This summary is machine-generated.

Elevated Bb levels in maternal blood, but not fetal cord blood, may predict preeclampsia, especially in African-American women. This suggests a maternal immune response involving complement factor B activation in preeclampsia development.

Keywords:
ComplementPreeclampsiaPregnancy

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Area of Science:

  • Obstetrics and Gynecology
  • Immunology
  • Maternal-Fetal Medicine

Background:

  • Preeclampsia is a major cause of maternal and fetal mortality.
  • Complement factor B (fB) fragment Bb has been inconsistently reported as a preeclampsia predictor.
  • Racial/ethnic variations may explain conflicting findings on Bb and preeclampsia.

Purpose of the Study:

  • To investigate maternal and fetal Bb levels in an ethnic minority population with preeclampsia.
  • To determine if racial/ethnic differences influence the association between Bb and preeclampsia.
  • To explore the role of maternal complement factor B activation in preeclampsia pathogenesis.

Main Methods:

  • Maternal venous blood and fetal umbilical cord blood were collected from 291 pregnant women (96% ethnic minority, 78% African-American).
  • 13% of participants were diagnosed with preeclampsia.
  • Statistical analyses included Mann-Whitney U test and multivariate analyses.

Main Results:

  • Maternal Bb levels were significantly higher in preeclamptic women compared to non-preeclamptic women.
  • Fetal cord blood Bb levels did not differ between the groups.
  • African-American subgroup analysis confirmed higher maternal Bb and normal fetal Bb in preeclampsia.

Conclusions:

  • Maternal complement factor B activation may contribute to preeclampsia development.
  • The findings are particularly relevant for African-American patients.
  • Further research into maternal immune responses in preeclampsia is warranted.