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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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Complementation Tests00:49

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A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
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Nursing interventions are chosen as part of the planning process to achieve patient outcomes. Once nursing diagnoses are determined, the goals and outcomes are specified, then the nursing interventions are selected and individualized according to the patient's situation.
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Community-based interventions in mental health represent a paradigm shift from institution-centered care to treatments embedded within the fabric of local communities. By prioritizing inclusion and leveraging existing societal structures, this approach fosters a supportive environment conducive to addressing mental health challenges while promoting individual dignity and agency.
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Operant Conditioning Intervention01:24

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Operant conditioning serves as a foundational principle in therapeutic interventions aimed at modifying maladaptive behaviors. Central to this approach is the notion that behaviors, both adaptive and maladaptive, are learned through reinforcement. By analyzing the environmental factors that reinforce problematic behaviors, clinicians can design interventions to weaken these reinforcements and replace maladaptive behaviors with healthier alternatives.
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Related Experiment Video

Updated: Jan 27, 2026

Adjunctive Diode Laser Therapy and Probiotic Lactobacillus Therapy in the Treatment of Periodontitis and Peri-Implant Disease
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Complement-Dependent Mechanisms and Interventions in Periodontal Disease.

George Hajishengallis1, Tetsuhiro Kajikawa1, Evlambia Hajishengallis2

  • 1Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States.

Frontiers in Immunology
|March 28, 2019
PubMed
Summary

Complement C3 inhibition shows promise for treating periodontitis, an inflammatory gum disease. This approach protected primates, suggesting potential as an adjunctive therapy for human periodontal disease.

Keywords:
AMY-101C3complementcompstatin Cp40inflammationperiodontitisprimate modelstherapeutics

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Area of Science:

  • Oral biology
  • Immunology
  • Pharmacology

Background:

  • Periodontitis is a common inflammatory disease causing tooth tissue destruction.
  • Existing therapies are insufficient for all patients, posing a public health and economic challenge.
  • Microbial dysbiosis and inflammation drive periodontitis, indicating host-modulation therapy potential.

Purpose of the Study:

  • To review evidence suggesting complement system hyperactivation in periodontitis.
  • To discuss the therapeutic benefits of complement inhibition in periodontitis.

Main Methods:

  • Review of clinical observations and pre-clinical intervention studies.
  • Focus on complement cascade interception at C3.
  • Evaluation of a small peptidic compound (Cp40/AMY-101) in non-human primates.

Main Results:

  • Evidence suggests complement hyperactivation in periodontitis.
  • Local administration of Cp40/AMY-101 protected non-human primates from periodontitis.
  • C3-targeted complement inhibition demonstrated therapeutic benefit.

Conclusions:

  • Complement system plays a key role in periodontitis pathogenesis.
  • C3-targeted therapy, like Cp40/AMY-101, is a potential adjunctive treatment for periodontitis.
  • Further investigation in humans is warranted for C3-targeted periodontal disease treatment.