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
Short answer: The phrase “DNA to direct and switch off chemo” describes a 2009 laboratory drug-delivery experiment, not a treatment patients can use. Zehui Cao and colleagues attached a nucleolin-targeting DNA aptamer to liposomes containing cisplatin. In the cell-delivery system, adding complementary DNA was reported to control how much of the payload was delivered.
That “switch off” was a control over an experimental delivery mechanism. It did not neutralize cisplatin already acting in a body, reverse chemotherapy side effects, or give patients a way to stop prescribed treatment. The available reports do not establish human safety, clinical benefit, regulatory approval or current availability.
What the 2009 headline actually referred to
The exact headline appeared in a Chemistry World news report dated 28 July 2009. Its wording made the idea sound like a remote control for chemotherapy: DNA would guide a drug toward cancer cells and then stop delivery if toxicity appeared. The underlying work was narrower. It described a cell-targeted delivery vehicle tested experimentally, not a clinical protocol.
The closest matching primary study, by Zehui Cao and colleagues, used liposomes as microscopic carriers. The liposomes contained cisplatin, a cytotoxic chemotherapy drug. A DNA aptamer was attached to the carrier so the system could recognize a chosen cellular target, identified in the study as nucleolin. Complementary DNA was then used as an “antidote” to regulate the extent of delivery in the experimental setup.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Those details matter because “switch off chemo” can mean several different things. In this case it meant reducing or controlling further delivery from a designed carrier. It did not mean removing cisplatin from the bloodstream, undoing damage to healthy tissue, or replacing a doctor’s decision about whether treatment should continue.
How the aptamer–liposome system was designed to work
- Load the carrier. Cisplatin was placed inside a liposome. A liposome is a membrane-bound particle used experimentally to transport a drug; it is not the same thing as free cisplatin circulating on its own.
- Add the targeting strand. The liposome was conjugated to a DNA aptamer. Aptamers are short nucleic-acid strands selected for their ability to bind a particular molecular target. Here, the aptamer provided the cell-targeting function, while the liposome provided the container.
- Expose cells to the construct. The reported work examined delivery to cells in an experimental setting. The abstract describes control of delivery extent, but it does not present a patient treatment schedule or clinical outcome.
- Introduce complementary DNA. A strand designed to pair with the aptamer was added. The study described this complementary strand as an antidote because it could alter the aptamer’s active configuration and thereby control how much carrier-mediated delivery occurred.
The division of labor is easy to miss in a short headline: the aptamer was the recognition element, the liposome was the carrier, cisplatin was the payload and the complementary strand was the control signal. DNA did not replace the chemotherapy drug or make cisplatin harmless.
What “switch off” means—and what it does not
What the experiment suggests
If a delivery system can be modulated after it reaches a target, investigators may be able to limit additional payload release or uptake. That is the practical meaning of the control described in the abstract. It is a property of the engineered carrier-and-DNA combination, demonstrated in an experimental cell-delivery context.
What it does not demonstrate
- It does not show that complementary DNA can deactivate cisplatin molecules that have already entered cells or begun damaging DNA.
- It does not show that an adverse reaction in a patient could be reversed on demand.
- It does not establish that every carrier particle would stop responding at the same time or that drug exposure could be reduced to zero.
- It does not provide instructions for changing, pausing or cancelling a prescribed chemotherapy regimen.
Anyone receiving chemotherapy should treat new or worsening symptoms as a medical issue and contact the oncology team or emergency services according to the instructions for that treatment. The 2009 delivery concept is not a substitute for those decisions.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
What evidence was reported
The primary abstract describes cell-specific cisplatin delivery using a nucleolin aptamer-functionalized liposome and says that complementary DNA could control the extent of delivery. It does not, in the material available for this article, establish a human trial, a survival advantage, a validated toxicity reduction, or a dose that clinicians could prescribe.
The Chemistry World item is therefore best read as a report about an early-stage platform. Its “if unwanted side effects appear” wording explains the motivation for an adjustable carrier, but it should not be read as proof that side effects were safely switched off in patients. No clinical population, response rate, adverse-event rate or approved indication is supplied.
Translation from a cell experiment to medicine would require evidence about distribution through the body, stability of both DNA strands, immune reactions, how the carrier reaches a tumor, how much cisplatin reaches healthy organs, and how quickly the control strand acts. The cited reports do not resolve those questions.
How this platform differs from other 2009 delivery ideas
Several targeted-delivery approaches were being explored around the same time. They should not be merged into one technology or treated as competing clinical treatments. The following comparison is limited to the mechanisms and payloads described in the cited reports.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
| Experimental platform | Payload | Targeting or release control | What the report establishes |
|---|---|---|---|
| Aptamer-functionalized liposome | Cisplatin | Nucleolin aptamer for cell targeting; complementary DNA reported to control delivery extent | Experimental cell delivery; no clinical protocol or patient benefit established |
| Targeted minicells | siRNA or a cytotoxic drug | Targeted minicells used for sequential treatment of drug-resistant tumors | A separate Nature Biotechnology study dated 28 June 2009; not the same carrier or DNA-control mechanism |
| pH-responsive carbon nanotubes | Doxorubicin | Folic-acid targeting with lower pH used to trigger release | A separate Biomaterials report describing delivery experiments in HeLa cells; not evidence for the aptamer-liposome system’s clinical status |
The table shows why a broad statement such as “DNA switched off chemotherapy” is misleading. Only the first row involves the complementary-DNA control described in the headline’s closest matching study. The minicell and carbon-nanotube papers used different materials, payloads and control mechanisms.
Why a controllable carrier could be useful in principle
Cisplatin is effective because it is toxic to dividing cells, but toxicity is also the central challenge of using it. A carrier that concentrates exposure near a selected cell type could, in principle, change the balance between tumor exposure and exposure elsewhere. A second molecular input that limits further delivery could, in principle, add an extra layer of timing control.
Those are design goals, not demonstrated patient outcomes. A targeting ligand can bind unintended cells, a carrier can break down before reaching its destination, and a control strand can have limited access to particles or tissues. Even if a carrier stops releasing new drug, molecules already delivered may continue to act. The 2009 report does not quantify these effects.
Recommended Free Tools
Why an “antidote” is not the same as a chemotherapy antidote
The word “antidote” in the abstract refers to the complementary DNA strand’s role in the engineered delivery circuit. It is a molecular counterpart to the aptamer, not a general antidote to cisplatin poisoning. The strand changes the behavior of the targeting or delivery component; it is not described as binding and neutralizing all cisplatin in a patient.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
This distinction also explains why the headline’s promise can be overstated. A true clinical reversal would require a reliable way to halt exposure throughout the body and to treat injury that had already occurred. Neither outcome is shown by the cell-delivery description.
Historical timeline
- 28 June 2009: A Nature Biotechnology paper examined sequential treatment of drug-resistant tumors with targeted minicells carrying siRNA or a cytotoxic drug. This was a different delivery platform.
- 2009: A Biomaterials paper described doxorubicin-loaded single-wall carbon nanotubes, using folic acid for targeting and lower pH to trigger release in delivery experiments with HeLa cells. This was also distinct from the aptamer-liposome system.
- 28 July 2009: Chemistry World published the exact-title report “DNA to direct and switch off chemo,” summarizing the idea of controllable, targeted delivery.
The date is important: this was an early wave of nanomedicine and nucleic-acid delivery work. A 2009 news report should not be presented as a current announcement of an available therapy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What would be needed before clinical use could be claimed
A credible clinical claim would require more than showing that cells receive a drug. Readers should look for several distinct milestones:
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →- Reproducible preclinical results: controlled studies showing where the carrier travels, how long it remains intact and whether the targeting effect is consistent.
- Safety characterization: evidence on immune activation, organ toxicity, unintended uptake and the effects of both the carrier and complementary DNA.
- Pharmacology and dosing: measured concentrations, timing, clearance and a defined method for controlling exposure.
- Human trials: prospectively designed studies reporting participants, adverse events and treatment outcomes.
- Regulatory review: authorization for a specific product, indication and dosing schedule.
The sources associated with the 2009 headline do not provide those milestones for the aptamer-functionalized cisplatin liposome. Present clinical availability therefore remains unestablished in the material at hand.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
How to interpret similar headlines
When a story says that DNA can “direct” a drug, ask which part of the system DNA performs. It may be a targeting ligand, a structural component, a sensor or a switch. In this case it was the aptamer and its complementary control strand; the drug itself remained cisplatin and the container remained a liposome.
When a story says treatment can be “switched off,” ask whether the report measured carrier release, drug concentration, biological activity or patient symptoms. Those are different endpoints. The 2009 report supports the first type of claim—control of delivery extent in an experimental system—not the latter three.
Finally, check the date and platform. A result involving minicells, carbon nanotubes, siRNA or doxorubicin cannot be used as proof that a cisplatin liposome controlled by complementary DNA works in humans. Similar goals do not make the technologies interchangeable.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteBottom line for readers asking whether DNA can turn off chemotherapy
DNA was used as part of a proposed control circuit for targeted cisplatin delivery in laboratory experiments reported in 2009. A nucleolin aptamer helped direct a liposome, and complementary DNA was reported to regulate the amount delivered. That is a promising engineering concept, but it is not evidence that patients can stop chemotherapy, reverse side effects or obtain an approved DNA-controlled treatment.
Quick Recap
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.
