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Related Concept Videos

Cancer Vaccines01:30

Cancer Vaccines

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Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
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Microorganisms in Medicine and Therapeutics01:29

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Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
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Conjugated Proteins02:50

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Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with non-protein moieties.
Nucleoproteins are protein complexes that contain nucleic acids, categorized as deoxyribonucleoproteins (DNPs) or ribonucleoproteins (RNPs) respectively. The nucleosome is a typical example of a DNP where nuclear DNA is associated with histone proteins. The major antigen for the Covid-19 virus SARS-CoV is an RNP that is critical...
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Potential SARS-CoV-2 vaccines: Concept, progress, and challenges.

Seyede Atefe Hosseini1, Fatemeh Zahedipour1, Hamed Mirzaei2

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Developing a potent coronavirus disease 2019 (COVID-19) vaccine is crucial. This review covers immune responses, vaccine platforms, and challenges in SARS-CoV-2 vaccine development.

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Area of Science:

  • Immunology
  • Virology
  • Vaccinology

Background:

  • The COVID-19 pandemic, caused by SARS-CoV-2, has led to millions of cases globally, necessitating urgent vaccine development.
  • Several countries are experiencing a resurgence of the virus, highlighting the critical need for effective vaccines.
  • Existing vaccine research shows progress, with some candidates in clinical trials and limited approvals in Russia and China.

Purpose of the Study:

  • To review the immune responses elicited by SARS-CoV-2 infection.
  • To provide an overview of various vaccine platforms being investigated for COVID-19.
  • To discuss the challenges encountered in developing a safe and effective SARS-CoV-2 vaccine.

Main Methods:

  • Literature review of current research on SARS-CoV-2 immunology and vaccine development.
  • Analysis of different vaccine platforms, including those in preclinical and clinical stages.
  • Identification and discussion of key challenges in vaccine design and efficacy.

Main Results:

  • An effective vaccine requires both cell-mediated and humoral immunity, alongside stringent safety and efficacy criteria.
  • Despite technological advancements, significant challenges remain, including incomplete understanding of SARS-CoV-2 pathophysiology.
  • Obstacles include inducing appropriate immune responses, potential immune enhancement issues seen with other coronavirus vaccines, and the lack of ideal animal models.

Conclusions:

  • The development of a successful COVID-19 vaccine is complex, requiring a deep understanding of viral immunology and overcoming specific developmental hurdles.
  • Continued research into immune responses and diverse vaccine platforms is essential.
  • Addressing challenges related to immune enhancement and animal models is critical for advancing vaccine candidates.