Sequenza on tumor only samples

[Shobana Sekar]

Hi,

Is it possible to run Sequenza on samples that do not have a matched normal? Is there any work-around for samples that are tumor only?

Thanks!

Shobana

[Francesco Favero]

Hi Shobana,

Short answer, yes….

I’ve managed to have decent performance on sample without a reference, but in that case I was using a random normal WXS to compare the depth.

The genotyping, in real patient data, it is possible to estimate from the tumor sample only, although when the purity is high enough, all the LOH region would suffer a lack of detection of heterozygous positions.

If you don’t have a normal WXS on hand you can identify the more normal-like sample (respect of the CNV profile) and use that as normal.

It is a workaround, and it might not work perfectly, but you can manage to set it up. Are you using varscan or the python script to generate the input files?

Both case it is possible to have the desired result without problem.

Best

Francesco

[Weini Huang]

Hi Francesco, 

I have a related questions. I have a drug-sensitive cell line (ancestor sample) and  drug-resistant cell lines  (evolved samples). Thus I also don't have the matched normal samples. I want to know the difference of CNVs between ancestor and evolved samples. How should I run Sequenza for such samples to get a meaningful results? 

For a test, I used my more normal-like sample - drug sensitive cell line- as normal, and evolved drug-resistant cell line as tumour. The results looks very suspicious to me. For example, the red bars in the genome view of copy number can up to 7 in many chromosomes. Could you give me some suggestions on this?

Thank you in advance,

Weini

[Francesco Favero]

Hi Huang,

I would do the same thing as you did, using the ancestor cell line as reference.

With cell lines the optimal setting might narrow the cellularity solution to 0.9 to 1 (or something similar), and there might be some problem in location where the ancestor (if) have loss of heterozygosity, where the daughter cell line would not have allelic information.

Beside all that, if your bam files where performed in different times, it might present bias such as replication time:

look at this file on IGV (or your preferred viewer)

http://hgdownload.cse.ucsc.edu/goldenPath/hg19/encodeDCC/wgEncodeUwRepliSeq/wgEncodeUwRepliSeqSknshWaveSignalRep1.bigWig

if your results have a profile remarkably similar to this pattern it might be effected by the bias.

I’m working on a solution about the above-mentioned bias (if you need it and if you want, I can share the work in progress solution, although it’s a bit rough at the moment).

Best

Francesco

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[pin wu]

Hi Francesco,

I encountered the same problem. I have WES data for a batch of tumor samples without control group. I want to use sequenza software to detect copy number variations in tumor samples. Based on your suggestions above, can I choose a random normal sample from other patients of the same cancer as control? Or is it better to combine the sequencing data of normal samples from multiple patients as a control?

Looking forward to your reply.

Best regards,

wupin

[Diana Ivanoiu]

Hi Francesco, 

I have a similar question/issue as someone above. I basically have WGS for the same cell line at different timepoints of treatment. I have used as normal my time 0 and I also get funny results. Also interestingly, I do get low cellularity and CNVs even if I run against this time 0 (normal) another time 0 replicate - tumour. It is basically just another subset of cells taken from the same flask - so I guess one would expect to see nothing? I was using this more of a control but it detects a lot of events. 

Any advice on this analysis? 

Many thanks, 

Diana

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What Are DMT Vape Pens?

DMT vape pens are specialized devices designed to vaporize and deliver N,N-Dimethyltryptamine through inhalation.
They look similar to regular vape pens you might see people using for nicotine or cannabis. But instead of those substances, these devices contain DMT in liquid or crystalline form.
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What Is DMT (N,N-Dimethyltryptamine)?

DMT, short for N,N-Dimethyltryptamine, is a naturally occurring psychedelic substance found in certain plants and animals. It’s been called the “spirit molecule” because of the profound, otherworldly experiences it produces.
Interestingly, the compound is structurally similar to serotonin—a neurotransmitter in your brain that regulates mood, sleep, and perception. For instance, Indigenous communities in South America have used DMT for centuries as part of ayahuasca ceremonies.
Note: Ayahuasca is a traditional brew that combines DMT-containing plants with other ingredients to create powerful spiritual experiences. In this context, the substance is used for healing and religious purposes.
Today, DMT exists in two main forms: natural extracts and synthetic versions made in laboratories. Street names for DMT include Dimitri, businessman’s special, and elf spice. The synthetic form typically appears as a white or yellowish crystalline powder.
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How Do DMT Vape Pens Work?

DMT vape pens work by heating the substance to a specific temperature where it vaporizes without combusting.
When you inhale through the mouthpiece, the vapor travels into your lungs. From there, DMT rapidly absorbs into your bloodstream through the lung tissue.
Your blood then carries it directly to your brain, where it binds to serotonin receptors. This binding process, especially at the 5-HT2A receptor, triggers the intense psychedelic effects DMT is known for.
Effects can begin within 10 to 15 seconds. Injecting DMT works quickly, too, but most people prefer vaping because it’s less invasive. Compare this to drinking ayahuasca, where it might take an hour to feel anything.
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What Does a DMT Experience Feel Like?

The DMT experience is often described as unlike anything else in the world of psychedelic drugs. Within seconds of inhaling, users report entering completely altered states of consciousness that feel more real than everyday reality.
Visual hallucinations are one of the most prominent effects of DMT. People describe seeing vivid geometric patterns, colorful landscapes, and intricate designs that seem to fold in on themselves.
Additionally, some users report encountering what they perceive as entities or beings during their DMT trip. These visions are typically far more intense than what you’d experience with LSD or psilocybin.
Auditory hallucinations and distortions are also common. Sounds might seem warped, echoing, or completely unfamiliar. Your sense of time often disappears entirely during the experience. Minutes can feel like hours, or time might seem to stop altogether.
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How Long Do the Effects of DMT Last?

Two of the defining characteristics of DMT are how quickly it works and how relatively short the effects last. Interestingly, that’s why some people nicknamed it “businessman’s special.” The entire experience can happen during a lunch break.
When you use DMT vape pens, the rapid onset means you’ll feel effects within 10 to 15 seconds of inhaling. The peak of the psychedelic experience typically lasts between 5 and 30 minutes.
Most users report that even the most intense visual hallucinations and altered states fade within this timeframe. The total duration of effects usually doesn’t exceed 60 minutes from start to finish.
To put the numbers in perspective: An LSD trip can last from 8 to 12 hours. Psilocybin experiences take from 4 to 6 hours. Finally, ayahuasca, which also contains DMT, produces effects lasting several hours.
After the main effects wear off, you may experience a comedown period. Some users report feeling confused, disconnected, or having racing thoughts during this time.
Note: While the effects of DMT pass quickly, it remains detectable in your system longer. Blood tests can show DMT for about 2 hours, saliva for 12 hours, and urine for 24 hours.

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What Are the Side Effects of DMT?

DMT produces numerous side effects that range from uncomfortable to potentially dangerous.
Physical side effects include:

Increased heart rate and blood pressure (immediate effect)

Dilated pupils that can last even after other effects fade

Dizziness and lack of coordination

Heart palpitations

Seizures in rare cases, especially when mixing DMT with other substances (i.e., opioids or certain medications)

Psychological side effects include:

Anxiety, confusion, and agitation, particularly during a bad trip

Intense paranoia or frightening hallucinations that feel threatening

Overwhelming altered states that can feel inescapable

Risk of triggering or worsening existing mental health conditions

Disclaimer: A bad trip with DMT can be especially distressing because of how quickly and intensely it hits you. Unlike LSD, where effects build gradually, DMT’s rapid onset means you can find yourself in an overwhelming altered state within seconds.
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What Are the Long-Term Effects of Using DMT?

The National Institute on Drug Abuse continues researching psychedelic substances, and evidence suggests DMT can have lasting impacts on mental health.
Common long-term effects include:

Flashbacks: Spontaneous re-experiences of the DMT trip that can happen days, weeks, months, or even years after use.

Visual distortions: Sudden episodes where you see patterns or colors even when sober.

Trigger sensitivity: Flashback episodes triggered by stress, fatigue, physical exercise, or use of other substances.

Worsening of pre-existing conditions: Intensified symptoms for those with a history of anxiety, depression, or psychosis.

Cardiovascular effects: DMT consistently raises blood pressure and heart rate during use, and repeated use can potentially impact heart health over time.

Unpredictable mental health impacts: The relationship between DMT and long-term psychological well-being remains under study.

Unlike many controlled substances, DMT doesn’t appear to cause physical withdrawal symptoms or traditional addiction patterns. However, the lack of physical dependence doesn’t mean the substance is safe or without serious health issues.
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Can You Overdose on DMT Vape Pens?

The good news is that fatal overdoses from DMT alone are extremely rare. Research suggests it’s highly unlikely you could take enough DMT to cause death from toxicity. Your body appears to have a natural limit to how much it can process.
However, “not fatal” doesn’t mean “safe.” Taking too much DMT can lead to extremely dangerous situations. You might experience severe psychological distress, complete loss of motor control, or intense confusion that puts you at physical risk.
The bigger danger comes from mixing DMT with other substances. Combining it with opioids, certain antidepressants, or other psychedelic drugs can cause serious complications.
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What Makes DMT Vape Pens Dangerous?

DMT vape pens have unpredictable potency. Unlike pharmaceutical medications with standardized doses, street DMT varies wildly in strength. One cartridge might be relatively weak while another can be overwhelmingly powerful.
Quality and purity are other concerns. You have no way of knowing what else might be in a DMT vape cartridge that you illegally purchase. Contaminants, cutting agents, or other psychedelic substances could be mixed in without your knowledge.
Mixing DMT with other substances dramatically increases risks. If anything, combining it with LSD, psilocybin, or opioids can trigger serotonin syndrome. The latter is a potentially life-threatening condition.
Finally, the convenience of vape pens might encourage more frequent use. As a result, it increases your exposure to both short-term and long-term health issues.
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Get Help for DMT Use Today

DMT vape pens might seem like a quick path to profound experiences, but the risks to your mental health, physical safety, and future don’t make it worth experiencing. Experimenting is one thing, but problematic use requires intervention.
At Illinois Recovery Center, we understand that psychedelic drug use often stems from a desire for meaning, connection, or escape from pain. Our evidence-based addiction treatment programs address not just the substance use, but the underlying issues driving it.
If you or a loved one needs help, contact us today. Your recovery starts with a single, compassionate conversation.

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Published on: 2025-12-30
Updated on: 2026-01-16

Posted in Hallucinogens

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When it comes to exploring the profound effects of 5-MeO-DMT, two options stand out: immersive 5-MeO-DMT retreats or the convenience of a vape pen. Which one is the better choice? 

Retreat vs. Vape: What’s the Difference?

Nonetheless, if this is a tough question for you, well, let's break it down. The first and most important thing you would like to consider is cost. How much does a Sapo (5 MeO DMT) retreat cost. Second, is it available in my country?

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A 5-MeO-DMT retreat offers a structured, ceremonial setting where facilitators guide your experience. However, these retreats often come with high costs, require travel, and operate on strict schedules.

A 5-MeO-DMT vape pen, on the other hand, delivers the same powerful psychedelic experience at your own pace, in a familiar setting, and for a fraction of the cost. Whether for microdosing or full immersion, vapes allow for controlled, measured dosing—a major advantage for beginners. Also just to remind you that https://t.me/SPIRITUALBREAKTHROUGHMINDEXPANDE is the go to for both psychonauts and beginners.

[ ] 5 MeO DMT Dosing & Safety – Why the Vape Wins

With a vape pen, you control how much 5-MeO-DMT you inhale. Standard vaporized doses range from 5-15mg, allowing you to ease into the experience rather than being overwhelmed.

First-time users should always have a trusted tripsitter to ensure a safe and supportive environment.

Retreats often provide a full-dose experience, which can be too intense for some. With a vape, you start low and adjust based on comfort.

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Vaping 5 MeO DMT is considerably the most efficient way of taking the Toad Venom. In contrast, with really illuminating and smoking it. Additionally, vaping the toad venom is significantly more carefully utilized.

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     In fact, if you are looking for you can order 5 MeO DMT crystalline powder (Freebase), Buy 5 MeO DMT vape pen, Buy 5 MeO DMT cartridge, Buy DMT powder, Buy DMT Disposable Vape pens, DMT cartridges, or Buy Tryptamine psychedelic products Psychedelic Online Dispensary is the place. We're based Colorado, home of the Sonoran Desert toad. We to all 50 states within the US and to 40 other countries worldwide. Our packaging is stealth and shipping is discreet.

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Why Choose a 5-MeO-DMT Vape?

✅ Cost-effective – No need for expensive retreat fees.

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a drug that can be combined with mixing agents to produce an E-liquid pen cartridgeDMT pens allow users more consistent control over dosage and hallucinogenic effectsThere is little to no data regarding the safety or potential health risks of an experience with DMT pens Drinking ayahuasca brewed from banisteriopsis caapi or smoking powder from a glass pipe isn’t the only way to have a psychedelic experience with the psychedelic drug DMT, also called the “spirit molecule”. It can also be mixed into E-liquid, casually referred to as “cart juice” with propylene glycol and vitamin E acetate, and inhaled using common vaporizers or E-cigarettes as DMT pens.

What DMT pen/mods do I need to use this with?Any mod will do really. It just needs to be able to output a low enough power so that it doesn't fry the carts atomizer.Carts are meant for pen batteries but box mods can work fine, you just have to be careful not to give the cart to much power.Something can change the wattage or voltage in small increments is better for carts. Like 0.1 watt increments https://rentry.co/rentrozaza carts and get the experience you expect.

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What is DMT?

Have you ever longed to disconnect from the outside world and get buried in your thoughts?

Dimethyltryptamine (DMT) is a naturally 5meo dmt for sale hallucinogenic tryptamine substance that has been utilized for generations in religious shaman ceremonies and rituals. It's also called as the "spirit molecule" because of its powerful psychedelic effects, which can include altered perception of space and time while taking you on a "businessman's trip."

DMT is a naturally occurring hallucinogenic substance found in plants such as Acacia bark, among others. Religious shamans have long identified it as one of God's messengers because when smoked during ayahuasca rituals, it allowed them to speak with spirits - aided by hallucinations so powerful that they believed these otherworldly entities lived outside of themselves.

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