Is it safe to touch a gel casting tray with bare hands

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Discussion Overview

The discussion centers around the safety of touching a gel casting tray used for Gel Electrophoresis that contained ethidium bromide, a substance known for its mutagenic and carcinogenic properties. Participants express concerns about potential health risks associated with exposure to ethidium bromide, particularly when handling laboratory equipment without proper protective gear.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Swetha expresses panic over touching an empty gel casting tray that previously contained ethidium bromide, questioning the safety of this action.
  • One participant suggests that if the tray was cleaned, there may be minimal to no ethidium bromide residue, but emphasizes that medical advice cannot be provided on the forum.
  • Another participant argues that the dangers of ethidium bromide are often exaggerated, noting that it is not a mutagen in various animal studies and should be treated like any standard laboratory reagent, recommending caution and proper handling practices.
  • A later reply reiterates the importance of using personal protective equipment (PPE) in the lab and suggests consulting a safety coordinator regarding proper safety protocols.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the safety of touching the tray, with some downplaying the risks associated with ethidium bromide while others emphasize the need for caution and proper lab safety practices. The discussion remains unresolved regarding the level of risk involved.

Contextual Notes

There are limitations in the discussion regarding the assumptions about the cleaning effectiveness of the tray and the varying interpretations of the risks associated with ethidium bromide exposure. The conversation also reflects differing opinions on the necessity of PPE in laboratory settings.

Swetha K
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Hi everyone,

I just touched empty gel casting tray with bare hands which was used for Gel Electrophoresis in which Ethidium bromide was used. I came to know that ethidium bromide is a mutagen and carcinogenic and teratogenic. I am panicked and worried. Is it safe? Kindly answer me.

Regards,
Swetha
 
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If the tray was empty and cleaned out, there was probably very little ethidium bromide left in it, if any at all. That said, we can’t dispense medical advice on the forum. If you’re really concerned, see a doctor.
 
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The dangers of ethidium bromide are often exaggerated
ethidium bromide, as far as can be told from the data, is not a human mutagen. It’s not a mouse mutagen or rat mutagen either. Nor apparently a mutagen in cows and other farm animals, where it’s used in veterinary medicine at concentrations one thousand times higher than the red solutions that are so feared in biology labs, seemingly with no bad effects. It’s not even Ames-positive by itself, but only after it’s been exposed to metabolizing enzymes, which tells you that some derivative of it has mutagenic potential, should you ingest it and send it through your liver, but apparently not the parent compound.
https://blogs.sciencemag.org/pipeline/archives/2016/04/18/the-myth-of-ethidium-bromide
It should still be handled with caution, just like you would handle any other standard laboratory reagent (i.e. do use gloves when handling the gel casting trays in the future). However, exposure to trace amounts insert going to kill you or doom you to cancer. If you do get exposed to EB on your bare hands again, be sure to wash them with soap.
 
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Swetha K said:
Hi everyone,

I just touched empty gel casting tray with bare hands which was used for Gel Electrophoresis in which Ethidium bromide was used. I came to know that ethidium bromide is a mutagen and carcinogenic and teratogenic. I am panicked and worried. Is it safe? Kindly answer me.

Regards,
Swetha
Welcome to the PF, Swetha. :smile:

You have gotten good responses in the thread so far, so at this point we will go ahead and close it. As mentioned, if you are worried, please see your doctor for advice.

Beyond that, though, I'd have a talk with your safety coordinator for that lab. It sounds like you should not have been handling materials and equipment there without the proper PPE (personal protective equipment) like gloves, etc. Please follow-up to be sure that all users of that lab understand the safety rules associated with using that lab. Thank you.
 
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