The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
A 2022 laboratory study found that polystyrene nanoparticles changed ubiquitin’s structure in vitro and lowered the overall ubiquitination signal in HeLa cells. At 0.2 mg/mL after 24 hours, the signal was 40% lower than in untreated cells. This was a cell experiment—not evidence that nanoplastics have the same effect in people.
What ubiquitination does—and what the study measured
Ubiquitination is the process of attaching ubiquitin, a small protein, to other proteins. These tags can help regulate what happens to a protein, including whether it is broken down, where it goes in a cell, or how its activity is controlled. A change in an overall ubiquitination signal can therefore indicate a shift in cellular protein regulation, but it does not by itself identify which proteins changed or what the consequences are.
The 2022 paper, “Polystyrene nanoplastics affect the human ubiquitin structure and ubiquitination in cells: a high-resolution study,” examined polystyrene nanoparticles (PS-NPs). The authors used circular dichroism, nuclear magnetic resonance, and transmission electron microscopy to study interactions between the particles and ubiquitin outside cells. They reported structural rearrangement of ubiquitin and formation of a hard protein corona—a relatively persistent layer of proteins associated with a particle—in those in-vitro experiments.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →What the HeLa-cell experiment found
HeLa cells, a human-derived cell line, were exposed to PS-NPs for 24 hours. For proliferation and metabolic assays, the tested concentrations were 0.2 ng/mL, 0.2 μg/mL, and 0.2 mg/mL. The study reported lower cell proliferation beginning at 0.2 μg/mL, with a greater decrease at 0.2 mg/mL.
#1 Best Overall
- Made from the Polystyrene materials, Non-toxic. The foam balls are lightweight, smooth, bright with assorted colors, Eco-friendly and NOT BLED!
- All foam balls are packed in resealable bags, no color bleeding when use, easy to take and store, no mess and more convenience!
- The colors of the foam beads are super bright, definitely a great no-mess project for summer. You can also exercise children's handmad,perfect supply for homemade slime . Kids love them.
- Great for all kinds of craft & hobby projects, science & school activities, or wedding & party decorations. DIY & Crafting activities. Can be used to stick to slime and make that crunchy noise, glue them to homemade holiday & birthday cards, decorations, school projects & much more.
- Christmas and New Year Must Have: this set of foam beads is a best choice for Christmas and New Year gift sending, ideal as Christmas stocking stuffers and will add more fun to your special events!
For the ubiquitination analysis, the researchers tested 0.2 μg/mL and 0.2 mg/mL. They reported a significantly lower overall ubiquitination signal at 0.2 mg/mL; analysis of western-blot band intensity indicated a 40% reduction versus untreated cells after 24 hours. That figure applies to this concentration, duration, cell model, and measurement—not to a measured effect in people or to typical environmental exposure.
How other cell studies compare
Other studies add context, but they do not directly replicate the HeLa experiment. Their cell types, particle sizes, and measured outcomes differ.
Rank #2
- Creativity With Foam Beads: Unleash creativity with the Sustainable Greetings Foam Beads, an abundant set of 80,000 white foam beads ideal for a variety of uses. These polystyrene foam beads for slime making supplies and other crafts promise endless imaginative possibilities.
- Textured Sensory Projects: Incorporate these foam slime decorations into your DIY projects for a satisfyingly textured sensory experience. Perfect as slime add-ins or as small packing beads, they provide stress relief and enhance creative play.
- Versatile Foam Decorations: Explore endless crafting options with these versatile slime decorations, whether creating faux snow or festive ornaments. Use them as foam slime enhancements for unique craft projects and cherished handmade mementos.
- Encourage Imaginative Play: Stimulate young minds with these polystyrene foam beads, perfect for home projects. To explore artistic creativity by using this white slime in innovative ways.
- Abundant Crafting Supply: This bulk set offers ample small packing beads for all your crafting needs. With dimensions of 0.08 to 0.12 inches in diameter, these foam beads provide the perfect polystyrene foam material for a multitude of creative endeavors.
| Study and cell model | Particles and exposure details reported | Main reported finding | How it relates to ubiquitination |
|---|---|---|---|
| 2022 study; HeLa cells | Polystyrene nanoparticles; 24 hours. Ubiquitination tested at 0.2 μg/mL and 0.2 mg/mL. | At 0.2 mg/mL, the overall ubiquitination signal was 40% lower than in untreated cells. | Measured an overall ubiquitination signal. |
| 2023 study; primary human nasal epithelial cells | Polystyrene nanoplastics, 50 nm and 500 nm. Dose and duration: not stated in the study summary. | Reported particle internalization, increased intracellular reactive oxygen species, decreased mitochondrial membrane potential, and accumulation of LC3-II and p62. | Examined autophagy-related effects, not the same global ubiquitination endpoint as the HeLa study. |
| 2026 study; mouse spermatocyte-derived cell lines | Polystyrene nanoplastics, 50 nm and 90 nm. Dose and duration: not stated in the study summary. | Reported increased ubiquitination and proteasome-dependent degradation of ferroportin 1 (FPN1). | Concerned ubiquitination of one particular protein, not the overall signal measured in HeLa cells. |
The increased FPN1 ubiquitination reported in the mouse-derived cells does not negate the lower overall signal reported in HeLa cells. The results concern different cell models and different endpoints; ubiquitination of a specific protein can change differently from a cell’s overall ubiquitination signal.
Recommended Free Tools
What the findings do—and do not—show
The HeLa result is evidence that PS-NPs can affect a ubiquitination measurement under the reported laboratory conditions. The in-vitro structural observations offer a possible line of explanation, but they do not establish the complete pathway that caused the cellular signal to fall. Nor do these studies establish that environmental nanoplastic exposure disrupts ubiquitination in people, define a human exposure threshold, or show that nanoplastics cause a particular disease.
Rank #3
- Polystyrene beads：Foam Beads amount 3000ml ,unleash your creativity with this expansive set of 3000ML white foam beads.A sufficient quantity will meet your needs.
- Product Size： White small foam beads with sizes ranging from (2-3mm). Packed in reclosable bag for easy storage between uses.
- High Quality-Made from the Polystyrene materials, Non-toxic.The polystyrene balls lightweight, smooth, bright assorted colors, Eco-friendly and NOT BLED!
- White Color- The colors of the craft foam Balls are super Snow-white and it was a great no-mess project for summer.Bright color made your DIY projects more beautiful. It's so much fun to make decorations with these homemade slime
- Wide ApplicationI: Great for all kinds of craft & hobby projects, or wedding & party decorations. DIY & Crafting activities. Can be used to stick to slime and make that crunchy noise, glue them to homemade holiday & birthday cards, decorations, school projects & much more.
The most accurate takeaway is narrow: one study reported structural interactions between polystyrene nanoparticles and ubiquitin in vitro, plus a 40% lower overall ubiquitination signal in HeLa cells exposed to 0.2 mg/mL PS-NPs for 24 hours. Other cell studies describe different outcomes, not direct confirmation of that finding in people.
Quick Recap
Best Value
- Premium Poly Beads: Elevate your creative projects with Fairfield’s Poly-Fil Mini Poly Beads! These 100% polystyrene beads are ideal for use in arts and crafts projects, sensory balls, stress balls, and more.
- Pillow Stuffing: The mini-sized foam beads perform best when combined with stretchy polyester fabrics to create soft, ultra-squishy pillows and toys. They are also great for stuffing therapy pillows, neck pillows, and travel pillows.
- Stuffing for Stuffed Animals: Our micro beads are also great for stuffing handmade dolls and animals, making floam, slime, holiday decorations, and snow, and conducting kids’ science experiments.
- Safe to Use: The poly foam beads are made in the USA and are safe for use in creative projects. However, they are not recommended for children under the age of 5.
- Washable Beads: The stuffing beads are washable, but only after they are inside a finished project. They are available in a 20-ounce pack.
Rank #4
- ❄️Polystyrene beads：Each fully filled bag about 3.4 Quarts of white small foam beads with sizes ranging from (2-3mm). Three times the quantity of the regular bag beads on the market.
- ❄️Foam Balls is made of high-quality polystyrene materials, Non-toxic. mini foam balls are lightweight, smooth, bright with assorted colors, Eco-friendly and NOT BLED!
- ❄️Those fully expanded polythyene smooth beads are soft, You can use it to stuffing for your pillow, bean bag refill, pet bed filling, Doll filling glass bottles dIy.
- ❄️Foam Beads amount 3.4 Quarts, Polythyene Beads for Floral Decoration and DIY Craft. Packed in reclosable bag for easy storage between uses.
- ❄️Abundant Crafting Supply: This bulk set offers ample small packing beads for all your crafting needs. With dimensions of 0.08 to 0.12 inches in diameter, these foam beads provide the perfect polystyrene foam material for a multitude of creative endeavors.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
