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Related Concept Videos

Aquaporins01:25

Aquaporins

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Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
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ABC Transporters: Exporter01:31

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ATP-binding cassette or ABC transporter is the largest superfamily of integral membrane proteins. The transporters have transmembrane-binding domains (TMDs) and nucleotide-binding domains (NBDs). The TMDs are specific to their substrates, whereas the NBDs are similar to engines that complete ATP hydrolysis to complete the substrate transport. They can be full transporters consisting of two TMDs and NBDs, half transporters with one TMD and NBD, while some encoded with a single TMD or NBD are...
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ATP Driven Pumps III: V-type Pumps01:30

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V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
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The Significance of Membrane Transport01:44

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The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
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Cancer Cell Migration through Invadopodia01:35

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Invadosome is a broad category of cell surface structures with proteolytic activity that  degrades the extracellular matrix (ECM). Invadosomes are present in normal cell types, including macrophages, endothelial cells, and neurons, as well as tumor cells. Although the macrophage podosomes and tumor cell invadopodia are classified as invadosomes, they have different structures, molecular pathways, and functions. Podosomes are short structures that last for a few minutes. However,...
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Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
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Aquaporin-5: from structure to function and dysfunction in cancer.

Inês Direito1,2, Ana Madeira1,2, Maria Alexandra Brito1,2

  • 1Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisbon, Portugal.

Cellular and Molecular Life Sciences : CMLS
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PubMed
Summary

Aquaporin-5 (AQP5) proteins are implicated in cancer progression, enhancing tumor cell proliferation, migration, and survival. Research highlights AQP5 as a potential biomarker and therapeutic target for various cancers.

Keywords:
AquaporinBiomarkerPermeabilitySignaling pathwaysTumorWater channel

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Oncology

Background:

  • Aquaporins (AQPs) are conserved membrane proteins facilitating water and solute transport.
  • Aquaporin-5 (AQP5) is increasingly detected in various cancer malignancies.
  • Emerging evidence suggests AQP5's role in carcinogenesis.

Purpose of the Study:

  • To review the structural and functional characteristics of AQP5.
  • To detail AQP5's tissue distribution and functions in the human body.
  • To highlight AQP5's expression patterns in tumors and its role in cancer mechanisms.

Main Methods:

  • Literature review of recent publications on AQP5 and cancer.
  • Analysis of AQP5's structural and functional features.
  • Examination of AQP5 expression in various human tumors.

Main Results:

  • AQP5 expression is linked to enhanced cancer cell proliferation, migration, and survival.
  • AQP5 shows potential as a drug target for cancer therapy.
  • AQP5 may serve as a biomarker for cancer aggressiveness.

Conclusions:

  • AQP5 plays a significant role in cancer biology and progression.
  • AQP5 holds translational potential for cancer diagnostics and therapeutics.
  • Further research into AQP5 is crucial for developing novel cancer treatments and prognostic tools.