Bioactive peptide PDBSN improves mitochondrial function and suppresses oxidative stress in human adipose cells

[trojanpeptide]

This PDBSN is an interesting compound involved in mitochondrial health. Here is a link to the original publication.

Abstract:

Mitochondria are essential for generating cellular energy and are significant in the pathogenesis of obesity. Human visceral and subcutaneous preadipocytes (HPA-v and HPA-s) were cultured into mature adipocytes. Intracellular triglyceride (TG) content was assessed using oil-red O staining and tissue triglyceride determination. Mitochondrial membrane potential (MMP) and reactiveoxygen species (ROS) levels were measured with fluorescent indicators. Gene and protein expression related to mitochondrial biogenesis were analyzed by real-time quantitative PCR and Western blotting. Morphological changes were observed via electron microscopy. Results show that PDBSN significantly increased MMP while decreasing TG and ROS levels. The transcription and protein levelsof PGC1-α and MTFA were upregulated, and mitochondrial fusion and fission markers (MFN1, MFN2, NRF1, DRP1) were elevated. Additionally, PDBSN enhanced maximumrespiratory capacity and reduced ROS. These findings suggest that PDBSN improves mitochondrial function, providing insights for obesity treatment and metabolic disease management.

The PDBSN peptide is explicitly defined in the literature as a 15‑amino‑acid sequence: GLSVADLAESIMKNL . This comes directly from the paper that first characterizes it as an anti‑adipogenic peptide, where it is named and the sequence given as “a novel peptide, PDBSN (GLSVADLAESIMKNL), that could significantly restrict adipocyte differentiation in vitro” (Shen et al., 2020). The earlier mechanistic work describes PDBSN as a “novel peptide PDBSN” that suppresses adipogenesis via AMPK activation, but in that abstract PDBSN is not spelled out; the sequence is instead provided in the later liposome‑encapsulation study (Shen et al., 2019).

Shen, D., Gao, J., Xia, J., Wang, X., Zhou, Y., Chen, L., Xu, L., & Guo, X. (2020). Liposome-encapsulated peptide PDBSN ameliorates high-fat-diet-induced obesity and improves metabolism homeostasis.. Biochemical and biophysical research communications . https://doi.org/10.1016/j.bbrc.2020.09.014

Shen, D., Li, Y., Wang, X., Wang, F., Huang, F., Cao, Y., You, L., Wen, J., Wang, Y., Cui, X., Ji, C., & Guo, X.-R. (2019). A novel peptide suppresses adipogenic differentiation through activation of the AMPK pathway.. Biochemical and biophysical research communications, 510 3 , 395-402. https://doi.org/10.1016/j.bbrc.2019.01.112

Seems like a nice research molecule for sure.

 

[ftv10hb]

So much of the technical stuff is over my head, but I still like to give it a shot and see what I can take from it lol. Am I right in thinking this is essentially repairing mitochondria in multiple ways or is it something that could improve or turbocharge the function of healthy mitochondria as well? How would you say this compares to SS-31 in function and effects?

 

[lessthanhalf]

Just pointing out those studies were in cells and mice not humans, and is early stage preclinical research and a long way from ready to consider it for human testing or experimentation.

 

[trojanpeptide]

is it something that could improve or turbocharge the function of healthy mitochondria as well? How would you say this compares to SS-31 in function and effects?

I'm going to use the AI to summarize this information for you. This is what PDBSN does:

1. Enhancement of Mitochondrial Function​[archived internal link]
PDBSN significantly improves core mitochondrial performance metrics:

Membrane Potential: It increases the mitochondrial membrane potential (MMP) , which is critical for energy production.

Energy Production: The peptide enhances ATP content and increases the maximum respiratory capacity of the mitochondria.

Oxidative Stress Reduction: PDBSN treatment leads to a significant decrease in reactive oxygen species (ROS) levels, mitigating oxidative damage within the cells.

2. Promotion of Mitochondrial Biogenesis​[archived internal link]
The study indicates that PDBSN stimulates the creation of new mitochondria:

Protein Upregulation: There is a significant increase in the transcription and protein levels of PGC1-α and MTFA (also referred to as TFAM), which are primary regulators of mitochondrial biogenesis.

DNA Copy Number: Mitochondrial DNA ( mtDNA ) levels increased by approximately 30% in treated adipocytes.

Morphological Improvements: Electron microscopy revealed a higher count of mitochondria with reduced incidence of swelling and vacuolation (signs of damage) compared to control groups. Fluorescence staining showed increased mitochondrial density, particularly in the perinuclear region and cytoplasm.

3. Regulation of Mitochondrial Dynamics​[archived internal link]
PDBSN influences the balance between mitochondrial fusion and fission, which is essential for maintaining a healthy mitochondrial network:

Marker Elevation: The expression of genes and proteins mediating fusion ( MFN1, MFN2 ) and fission ( DRP1, NRF1 ) was elevated.

Dynamic Equilibrium: These findings suggest that PDBSN promotes active mitochondrial turnover and remodeling.

4. Reduction of Lipid Accumulation​[archived internal link]
While primarily a metabolic effect, the reduction in lipid storage is linked to improved mitochondrial function:

Triglyceride Reduction: PDBSN treatment significantly decreased intracellular triglyceride (TG) content and lipid deposition.

Mechanism: By improving mitochondrial respiration and ATP production, the peptide helps regulate energy expenditure, preventing the excessive energy accumulation that leads to fat storage and mitochondrial dysfunction.

So I'd go with 'supercharges' as my final answer.

Just pointing out those studies were in cells and mice not humans, and is early stage preclinical research and a long way from ready to consider it for human testing or experimentation

Yes, I said it was an interesting compound. But your comment is a bit off for this forum, since really Khavinson peptides have no human testing, and some not even tested in the tissue that is supposed to work in, such as cartalax (only research done in kidney cells and yet it cures cartilage... bs). So idk about long way to consider for human consumption . MT-2 causes cancer and hypertension and yet many are using it to lookmax.

 

[lessthanhalf]

Posts like the one above, give the impression that the research is much more solid than it really is,, when they fail to mention the sources of the information being solely cell or animal studies. I think if people want to take peptides never tested in humans, then that is their choice, but I think it is pretty important to know that first, and many of these descriptions and various protocols give people the false impression they are tested in humans and the effects are known, when that is not the case.

This is a GLP forum, and they are well studied, even if not all of them are quite finished phase 3 trials yet. Occasionally reminding people there are risks with taking unstudied peptides, will not convince many, but may counteract the false impressions about safety that arise from detailed descriptions of their effects based solely on cell or animal studies, that fail to mention that fact. There will be unknown and possibly serious adverse events from tens or hundreds of thousands of people using peptides that have not been tested in human clinical trials.

 

[DjJoshua]

This PDBSN is an interesting compound involved in mitochondrial health. Here is a link to the original publication .

Abstract:

Mitochondria are essential for generating cellular energy and are significant in the pathogenesis of obesity. Human visceral and subcutaneous preadipocytes (HPA-v and HPA-s) were cultured into mature adipocytes. Intracellular triglyceride (TG) content was assessed using oil-red O staining and tissue triglyceride determination. Mitochondrial membrane potential (MMP) and reactiveoxygen species (ROS) levels were measured with fluorescent indicators. Gene and protein expression related to mitochondrial biogenesis were analyzed by real-time quantitative PCR and Western blotting. Morphological changes were observed via electron microscopy. Results show that PDBSN significantly increased MMP while decreasing TG and ROS levels. The transcription and protein levelsof PGC1-α and MTFA were upregulated, and mitochondrial fusion and fission markers (MFN1, MFN2, NRF1, DRP1) were elevated. Additionally, PDBSN enhanced maximumrespiratory capacity and reduced ROS. These findings suggest that PDBSN improves mitochondrial function, providing insights for obesity treatment and metabolic disease management.

The PDBSN peptide is explicitly defined in the literature as a 15‑amino‑acid sequence: GLSVADLAESIMKNL . This comes directly from the paper that first characterizes it as an anti‑adipogenic peptide, where it is named and the sequence given as “a novel peptide, PDBSN (GLSVADLAESIMKNL), that could significantly restrict adipocyte differentiation in vitro” (Shen et al., 2020). The earlier mechanistic work describes PDBSN as a “novel peptide PDBSN” that suppresses adipogenesis via AMPK activation, but in that abstract PDBSN is not spelled out; the sequence is instead provided in the later liposome‑encapsulation study (Shen et al., 2019).

Shen, D., Gao, J., Xia, J., Wang, X., Zhou, Y., Chen, L., Xu, L., & Guo, X. (2020). Liposome-encapsulated peptide PDBSN ameliorates high-fat-diet-induced obesity and improves metabolism homeostasis.. Biochemical and biophysical research communications . https://doi.org/10.1016/j.bbrc.2020.09.014

Shen, D., Li, Y., Wang, X., Wang, F., Huang, F., Cao, Y., You, L., Wen, J., Wang, Y., Cui, X., Ji, C., & Guo, X.-R. (2019). A novel peptide suppresses adipogenic differentiation through activation of the AMPK pathway.. Biochemical and biophysical research communications, 510 3 , 395-402. https://doi.org/10.1016/j.bbrc.2019.01.112

Seems like a nice research molecule for sure.

You should do a cycle and let ALL of us know how it worked out for you.....

 

[trojanpeptide]

Guys, I seriously doubt any vendor is currently selling this peptide. I only dinged it to share some information. We are seeing many diseases and their progression is due to the inadequacies of the mitochondria, so another peptide which could possibly help us combat age-associated disease is a bonus in my books.

@lessthanhalf ok bro. it has been tested in mice. This isn't just from one study. But I am curious as to why you bother pointing that out with this peptide, which actually has data behind it but isn't commercially available, yet not for the plenitude of other peptides that have no evidence but that are being sold atm? Anyhow, no ill will, it's all good.

You should do a cycle and let ALL of us know how it worked out for you.....

pay for it and i will

 

[lessthanhalf]

I do actually make comments like this about other peptides every so often, but it is a bit like pissing in the wind. I just thought the amount of research on these was less than average and older and less close to being viable for human testing. At least stuff like semax has been used by thousands online which is not going to pick up all the possible adverse effects, but if there were common serious problems there would probably be some indication from peoples posts about it.

Unprompted AI's can give pretty authoritative sounding descriptions of these peptides and their effects, with the same issue, failing to mention the lack of human testing, so it really is easy to be misled about safety. I do not think most of these peptides are going to kill people experimenting with them, but if a common one increased cancer risks by a few percent , it could really add up, and there would most likely be no way of ever knowing if it was to blame.

 

[trojanpeptide]

At least stuff like semax has been used by thousands online which is not going to pick up all the possible adverse effects, but if there were common serious problems there would probably be some indication from peoples posts about it.

wtf? that's called Bandwagon Fallacy.

Also, AI? another wtf. This is a strawman argument. I didn't learn about this peptide from AI, I learned from reading publications.

So sharing information about peptides is now going to get criticized because the studies are in mice, whereas there are NO studies on some of the peptides people use even in mice, yet it's ok because thousands of people are doing it.

I attached a document for you, no AI, no mice. Just plain fact.

 

[DjJoshua]

Guys, I seriously doubt any vendor is currently selling this peptide. I only dinged it to share some information. We are seeing many diseases and their progression is due to the inadequacies of the mitochondria, so another peptide which could possibly help us combat age-associated disease is a bonus in my books.

@lessthanhalf ok bro. it has been tested in mice. This isn't just from one study. But I am curious as to why you bother pointing that out with this peptide, which actually has data behind it but isn't commercially available, yet not for the plenitude of other peptides that have no evidence but that are being sold atm? Anyhow, no ill will, it's all good.

pay for it and i will

maybe we can start a gofundyou page?

 

[Airborne Daddy]

So much of the technical stuff is over my head, but I still like to give it a shot and see what I can take from it lol. Am I right in thinking this is essentially repairing mitochondria in multiple ways or is it something that could improve or turbocharge the function of healthy mitochondria as well? How would you say this compares to SS-31 in function and effects?

Or mots?

 

[trojanpeptide]

maybe we can start a gofundyou page?

tbh peptides like this one probably would last much longer than a minute before being degraded in vivo. I would spend more time investigating/modifying CGP42112A. Maybe I will write something up for that one next time.

Or mots?

exactly, another potential player.

 

[lessthanhalf]

I'm going to use the AI to summarize this information for you. This is what PDBSN does:

1. Enhancement of Mitochondrial Function​
PDBSN significantly improves core mitochondrial performance metrics:

Membrane Potential: It increases the mitochondrial membrane potential (MMP) , which is critical for energy production.

Energy Production: The peptide enhances ATP content and increases the maximum respiratory capacity of the mitochondria.

Oxidative Stress Reduction: PDBSN treatment leads to a significant decrease in reactive oxygen species (ROS) levels, mitigating oxidative damage within the cells.

2. Promotion of Mitochondrial Biogenesis​
The study indicates that PDBSN stimulates the creation of new mitochondria:

Protein Upregulation: There is a significant increase in the transcription and protein levels of PGC1-α and MTFA (also referred to as TFAM), which are primary regulators of mitochondrial biogenesis.

DNA Copy Number: Mitochondrial DNA ( mtDNA ) levels increased by approximately 30% in treated adipocytes.

Morphological Improvements: Electron microscopy revealed a higher count of mitochondria with reduced incidence of swelling and vacuolation (signs of damage) compared to control groups. Fluorescence staining showed increased mitochondrial density, particularly in the perinuclear region and cytoplasm.

3. Regulation of Mitochondrial Dynamics​
PDBSN influences the balance between mitochondrial fusion and fission, which is essential for maintaining a healthy mitochondrial network:

Marker Elevation: The expression of genes and proteins mediating fusion ( MFN1, MFN2 ) and fission ( DRP1, NRF1 ) was elevated.

Dynamic Equilibrium: These findings suggest that PDBSN promotes active mitochondrial turnover and remodeling.

4. Reduction of Lipid Accumulation​
While primarily a metabolic effect, the reduction in lipid storage is linked to improved mitochondrial function:

Triglyceride Reduction: PDBSN treatment significantly decreased intracellular triglyceride (TG) content and lipid deposition.

Mechanism: By improving mitochondrial respiration and ATP production, the peptide helps regulate energy expenditure, preventing the excessive energy accumulation that leads to fat storage and mitochondrial dysfunction.

So I'd go with 'supercharges' as my final answer.

Yes, I said it was an interesting compound. But your comment is a bit off for this forum, since really Khavinson peptides have no human testing, and some not even tested in the tissue that is supposed to work in, such as cartalax (only research done in kidney cells and yet it cures cartilage... bs). So idk about long way to consider for human consumption . MT-2 causes cancer and hypertension and yet many are using it to lookmax.

This post is very obviously AI written and formatted, which is why I made the comment about AI. People on forums writing from memory just do not write in that style. AI's can be very useful, with excellent pharmaceutical knowledge, but I do not trust the output of unprompted AI's.

I do not think that semax is proven to be safe, but there are thousands of posts about it online, and the fact that there are few adverse effects reported is real information, not in any way completely reliable, but that small unreliable bit of information is better than nothing. Adverse effect reporting on forums is still going to be influenced by confirmation bias, but there are many reports of unusual or unique effects that suggest people do report effects that were not influenced by expectation. I saw a very recent paper that did an AI analysis of GLP adverse effects from reddit posts that found previously undocumented adverse effects.

I do not consider all the glowing reports of KLOW or GLOW being effective at fixing various ailments to be reliable, but I would take seriously adverse effects reported for it.

Adverse effects mentioned in this forum for GLP drugs is similarly useful information, and has contained multiple reports of effects that are not documented in the studies for reta, such as panic attacks, prolonged hiccoughs and arrythmias. And otherwise adverse effects reported on this forum for GLP drugs are very consistent with the research.

I have no problem at all and am interested in research on cells or mice, that is where most of the research gets done, all I am suggesting is that it is preferable that the source of the research is made clear, because most people do not read the science papers the info comes from and people often can and do form false impressions due to this issue. I would argue that peptide sellers and promoters do it intentionally and deliberately to make their peptides more saleable and with the intention of giving false impressions of safety or efficacy. Unfortunately because of the way people's brains work, just repeating something enough times regardless of its accuracy is enough to make people believe it is true.

 

[trojanpeptide]

@lessthanhalf , i asked AI to help summarize. I thought it did a great job ! btw, PDBSN has research on human adipocytes, which is a lot more than a lot of peptides. It's all good man, I would have preferred to have actually discussed the peptide instead of this... idk safety? whatever. I know of several interesting peptides, some I would even try to modify, but yea, I'm not wealthy enough for that game.

anyhow, imma chill for the battle of rhetoric; strict science = cool discussion.