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Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
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Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
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Microtubules are dynamic structures that undergo continuous assembly and disassembly. They originate from specialized multi-protein complexes known as microtubule organizing centers or MTOCs. Within the MTOC, the point of origin of the microtubule is known as the minus end, while the end radiating outward is the plus end. Microtubules serve two primary functions — the organization of spindle complexes to separate sister chromatids during mitotic or meiotic cell division and the formation...
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Adverse reactions to diuretics.

B N Prichard1, C W Owens, A S Woolf

  • 1Division of Clinical Pharmacology, University College, London, U.K.

European Heart Journal
|December 1, 1992
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Summary
This summary is machine-generated.

Diuretics cause biochemical changes like hypokalemia and hyponatremia, with predictable and rare side effects. Potassium-sparing diuretics are preferred for managing electrolyte imbalances and potential cardiac risks.

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Area of Science:

  • Pharmacology
  • Nephrology
  • Biochemistry

Background:

  • Diuretics induce biochemical alterations and subjective side effects.
  • Common side effects include hypovolemia and hypokalemia, dose-dependent and manageable with supplements.
  • Potassium-sparing diuretics are preferred for correcting electrolyte imbalances and associated magnesium loss.

Purpose of the Study:

  • To review the biochemical and subjective side effects of diuretics.
  • To discuss the predictability and management of diuretic-induced adverse events.
  • To highlight potential benefits, such as anti-osteoporotic effects, and risks in specific patient populations.

Main Methods:

  • Literature review of diuretic side effects.
  • Analysis of biochemical changes induced by various diuretic classes.
  • Evaluation of clinical implications and management strategies for adverse events.

Main Results:

  • Common side effects: hypovolemia, hypokalemia (thiazides, frusemide), dose-dependent.
  • Rare but severe side effects: hyponatremia, non-ketotic hyperosmolar coma, ototoxicity (frusemide).
  • Potential benefits: reduced calcium excretion (anti-osteoporotic effect). Increased glucose/insulin resistance and elevated urate levels.

Conclusions:

  • Diuretic side effects are largely predictable based on circulatory volume and renal transport.
  • Potassium-sparing diuretics offer advantages in managing electrolyte disturbances.
  • Careful monitoring and judicious use are essential, especially in diabetic patients and those at risk for cardiac arrhythmias.