Reactive nerve cells have firstly been cultured!

The official website of University of Pennsylvania School of Medicine has just announcement on17th that research team from the hospital James Abbe for the first time used the surgical excision of the brain tissue in the laboratory to culture adult nerve cells and to identify five types of brain cells and each cell synthesis of proteins. The study using recombinant human proteins has been published in the issue of Cell Reports this week.

The brain tissue in this trial did not contain tumor cells from seven patients, including three patients with epilepsy who received temporal lobe surgery after temporal lobectomy and four patients with glioblastoma after surgery. The researchers from excised tissue was picked out without any tumor cells used in part. When these tissue samples were obtained, they were immediately treated with papain, a proteolytic enzyme, to produce active neurons. They analyzed more than 300 active cells one after the other and identified five known brain cell types: oligodendrocytes, microglia, neurons, endothelial cells and astrocytes.

Because it is not possible to study individual neuronal cells in adult patients, human brain disease awareness and development-related therapies have been slow. "It's amazing how we can nurture nerve cells, and we're finally going to have a mystery about the most mysterious organism in the body," says Abbein. "Previous studies of geriatrics rely primarily on animal models, but this time, Neurocytes originate in different age groups from the age of 20 to 60 years and can be used to detect the difference of molecular markers between the nerve cells of the elderly and the young people so as to provide a new research system of geriatric diseases."

The team used RNA sequencing to find more than 12,000 genes in these cells, and each has hundreds of different RNAs. They also identified long-chain non-coding RNAs corresponding to different cell types, resulting in a completely different gene expression in each patient's nerve cells, which provided strong support for personalized medicine. The researchers said that the new study on the use of cell replacement therapy to repair damaged brain tissue "repair neurosurgery" is of great significance. It is expected to make this therapy as soon as possible in human clinical trials. Flarebio offers high-quality recombinant proteins like recombinant Cdh11 for you research.

New progress in the research of protein structure and function under confinement domains

Recently, Li Conggang study group from Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences have made new progress in the research of protein structure and function under confinement domains. The results of the study are published in the journal Angew. Chem. Int. Ed, which also has other studies on recombinant rat proteins.

The confinement environment exists commonly in cells, such as molecular chaperone protein GroEL, ribosome peptide chain channel molecular machinery and a variety of organelle membrane gaps. It has been shown that confinement environments have an effect on the folding and stability of protein, but the effect of confinement conditions on the structure and function of multi-domain proteins is poorly understood.

Nuclear magnetic resonance spectroscopy is the most powerful means to obtain high resolution structures and functions of protein in complex environments. Researchers have used NMR to study the structure and function of the important signal transduction protein, calmodulin in simulated confinement environments.

The results showed that: 1) The structure of calmodulin was significantly different from that in dilute solution, in which calmodulin mainly existed in stretched structure and compact spherical structure in confined environment; 2) Calmodulin can interact with MLCK peptide, AcN19 peptide and somatostatin peptide. While in calm environment, calmodulin can bind to MLCK and AcN19 peptide and hardly bind to somatostatin peptide. Further studies have shown that the reason for the difference in function between the two environments is the spatial volume effect, not the difference in affinity. This study analyzes the high-resolution structure of the double-domain proteins in the first confinement environment, providing a structural basis for understanding the environmental effects of protein functions. At the same time, the study suggests that cells may use the restricted environment to regulate the function of some biological macromolecules.

Assistant researcher Xu Guohua and Ph.D. candidate Cheng Kayi are the co-authors of this article, and researcher Li Conggang is the communication contact person. Cusabio provides you with high-quality recombinant proteins such as recombinant CDH11 at competitive prices.

β-amyloid deposits are also found in heart f AD patients

In a small study using recombinant human proteins, patients with Alzheimer's disease had β-amyloid deposits in their heart tissue, and these patients also showed impaired myocardial function. The study was published in the Journal of the American College of Cardiology on December 6, 2016.

Four patients with Alzheimer's disease were detected Federica del Monte and colleagues at Beth Israel deaconess medical center in Boston and found that both β-amyloid-40 and β- amyloid-42 existed in myocardial cells and myocardial interstitium. At the same time, the study found that the absence of Alzheimer's disease control group of cardiac tissue showed no β-amyloid deposition.

In addition, linear regression analysis showed that patients with Alzheimer's disease had worse diastolic function at an early stage. "Alzheimer's disease and heart disease are both debilitating and life-threatening diseases that affect a large population of patients," del Monte and colleagues write. "Our research emphasizes the need for new diagnostic methods and treatments for previously excluded problems of brain and heart disease."

"We provide new evidence that the heart and brain can be affected in the same clinical setting, and we found that diastolic dysfunction is an early defect in patients with Alzheimer's disease and that intramyocardial amyloid deposition is present in these patients myocardium and the beta-amyloid pre-amyloid oligomers can affect heart and brain cell function and may lead to cardiac insufficiency in the study."

"Although these findings need to be validated in large populations, this study provides an interesting and possible paradigm shift in our understanding of highly pathologic and largely incurable diseases." Brian C. Jensen and Monte S. Willis at University of North Carolina at Chapel Hill wrote in an accompanying editorial. Flarebio offers good-quality recombinant proteins including recombinant CDH11 at competitive prices.

The preservation of β-keratin and pigment bodies in the fossil

Chinese and American scholars completed an article entitled "Early Cretaceous birds - the beginning of the Confucius bird feather keratin and molecular evidence of pigment body and published the paper on November 22 online in the Proceedings of the National Academy of Sciences, which also has other studies on recombinant horse proteins.

Dr. Pan Yanhong at Nanjing institute of geological paleontology, Chinese academy of sciences, Academician Zhou Zhonghe at Institute of Palaeontology and Paleoanthropology, Chinese Academy of Sciences, Professor Zheng Xiaoting from Linyi University, Shandong Province, China Prof. Shi Weicai from North Carolina State University, USA and his team conducted detailed Ultrastructure and biochemical analysis on the plumage of the first Confucius fossil specimen in the Shandong Tianyu Nature museum, confirming the preservation of β-keratin and pigment bodies in the fossil of 130 million years ago for the first time.

Current birds have colorful colors, which mainly depends on the feathers with the pigment body and feather internal structure. Feather pigment particles can be formed with the feathers into the different parts of the feathers, and thus the internal structure and other factors with the feathers can determine the different colors of the feathers.

However, the previous analysis of fossil feather pigments failed to accurately complete pigmentation of the signal in situ calibration to the pigment body. In this paper, a variety of chemical and molecular techniques were used to analyze chemical signals, including the immunoelectron microscopy (SEM) and ultra-high-resolution elemental energy spectroscopy (EHR), which were applied to fossil analysis for the first time. Their results not only confirmed the preservation of β-keratin in the fossils of 130 million years ago, but also confirmed that the micro-structure of feather fossils is wrapped by β-keratin, which are indeed the chromosomes of feathers. This work has advanced the age of β-keratin preservation for at least 50 million years, which is of great significance to better understand the soft tissue structure, the preservation of fossil molecules and the evolution of feather ultrastructure in ancient fossils. Flarebio provides you with superior recombinant proteins including recombinant Cdh11.

Scientists discover an antimicrobial peptide to destroy drug-resistant bacteria

In order to deal with the arsenal of bacteria, scientists have taken various different approaches. They no longer develop and improve traditional antibiotics but look to some of the natural antimicrobial substances through recombinant dog proteins. Some of them are fragments of proteins, known as peptide. Recently, researchers from the Massachusetts Institute of Technology, University of Brasilia and the University of British Columbia in Canada designed an antimicrobial peptide that can eliminate many bacteria, including drug-resistant bacteria. This result was published in the Nature Publishing Group Scientific Reports.

Many organisms naturally produce antimicrobial peptides, which are part of the body's own immune system, not only to destroy invading bacteria, but also kill other microorganisms, including fungi and viruses. They have the advantage of acting on bacteria through a number of different mechanisms. First, they can drill holes in the cell membrane that invades the bacteria and can destroy multiple targets, including DNA, RNA, and proteins when inside the bacteria. Second, they can activate the body's own immune system and call the white blood cells to completely eradicate the invasion of microorganisms. This is also the biggest difference between these peptides and traditional antibiotics. In addition, they can also inhibit the immune system due to excessive systemic sepsis.

Naturally-produced antimicrobial peptides are usually composed of 20 amino acids, which include a positively-charged region to help punch in the cell membrane and a hydrophobic region so that it can smoothly go through the cell membrane into the bacteria inside. With the development of modern computing technology, scientists can replace or add new amino acids to transform the natural antibacterial peptides and even design and manufacture of new antibacterial peptides so that they become more lethal.

In this study, the scientists improved based on antibacterial peptide clavanin-A found in the body of a marine organism sea squirt, including the addition of five hydrophobic amino acids to make the entire polypeptide more easily to go into the bacteria. They called the new antibacterial peptides clavanin-MO. In mice, clavanin-MO was found to abolish resistant E. coli and Staphylococcus aureus strains. It also destroys biofilms formed by bacteria on the surface of objects, such as biofilm formed by Pseudomonas aeruginosa found in the lungs of patients with cystic fibrosis.

"Our goal is to find solutions to antibiotic resistance," said Cesar de la Fuente, Ph.D., one of the authors of the paper. Drug-resistant bacteria are expected to exceed cancer and become the number one killer of human health. Antibacterial polypeptide provides an effective alternative: a molecule that can kill resistant bacteria and boost immunity and prevent excessive immune responses."

The researchers plan to further improve the design of antibacterial peptides and eventually put into clinical use. They believe that if combined with traditional antibiotics, it can be more effective in the eradication of bacteria and prevent new drug resistance. Flarebio offers good-quality recombinant proteins like recombinant CDH11.

The key genetic switch in the liver has the function of regulating glucose metabolism

Researchers have recently discovered that the key genetic switch in the liver has the function of regulating glucose metabolism and insulin secretion in other organs through recombinant mouse proteins.

Diabetes is a chronic disease. Now, the incidence of diabetes is becoming more and more serious. In Germany, more than 6 million people suffer from this disease. Diabetes is characterized by impaired glucose metabolism (with the exception of type 1 diabetes) as well as by the body's response to insulin. Scientists are currently looking for possible causes of the disease and modulators that could be used to intervene therapeutically.

Currently, a team led by Professor Stephen Herzig has discovered a new mechanism responsible for mediating glucose metabolism. Transforming growth factor-β1-stimulated clone 22D4 (abbreviated as TSC22D4) acts as a molecular switch in the liver and regulates the effects on the systemic metabolic genes.

“As early as 2013, researchers have shown that increasing the expression of TSC22D4 in the liver of cancer mice can lead to severe weight loss,” study leader Herzig said. In this study, researchers have studied the role of this gene modulator in diabetes.

In the current study, the researchers found that TSC22D4 inactivation can improve insulin resistance and glucose metabolism. Further study showed that TSC22D4 can inhibit the formation of apolipoprotein 13. This protein can be released as a messenger material from the liver and regulate other organs of glucose metabolism.

In order to examine the new mechanism and clinical relevance of this finding, the researchers examined 66 patients with type 2 diabetes or healthy liver. The results showed that in the liver of diabetic patients, TSC22D4 gene expression was more than normal, and the synthesis of corresponding reduction in apolipoprotein 13 reduced. "The results of the study help to find new ways to treat diabetes," the researchers said. Flarebio offers recombinant proteins such as recombinant CDH11 at competitive prices.

Nanotechnology is expected to be used to treat Alzheimer's disease

Researchers have developed a new treatment that uses tiny droplets of fat to carry drugs into the brain to prevent the development of Alzheimer's disease. This method of treatment for targeting drugs to cancer cells has been successfully applied to memory loss in the first recovery of Alzheimer's disease in mice. The study, led by researchers at the University of Lancaster, was funded by the Alzheimer's Society and published in the journal Nanomedicine Nanotechnology, Biology and Medicine, which has published a lot of studies on recombinant human proteins.

This treatment uses tiny fat droplets known as nano-liposomes which are coated in protein fragments. It can prevent the amyloid from accumulating into plaques even at the condition of low concentrations. Amyloid plaques are toxic clumps of proteins that cause damage to cells in the brain of Alzheimer's patients. Mice that were genetically altered to develop Alzheimer's disease were injected with nano-liposomes for three weeks. Those who received the drug restored their long-term memory and were able to recognize the familiar object after 24 hours. In contrast, placebo-injected mice didn't have memory of the objects seen in previous day.

"The research results of this summer show a new discovery of antibody drugs that target amyloid plaques using the body's immune system," said lead investigator David Allsop. However, if these methods are successful, treatment must be instilled through the IV at the clinic and may have some potentially harmful side effects.

Commenting on the innovative approach to dementia treatment, Dr. Doug Brown, Director of Research and Development for Alzheimer's Disease, said, "There were no new dementia drugs in the last 15 years, and we are at a critical moment in dementia research. Crucially, we will continue to sniff new drugs into the brain approach. Although we look forward to the results of ongoing clinical trials, Alzheimer's Association will continue to finance innovative research to address dementia.

Nanotechnology is expected to bring enormous benefits to many people with different types of cancer. It is exciting that it can provide the same hope for the most common forms of dementia one day. Flarebio provides good-quality recombinant proteins like recombinant CDH11.

Japanese use in-vitro light to control DNA recombinant reaction

The University of Tokyo in Japan announced on October 11th in 2016 that they have successfully developed a new technology which can efficiently control the DNA recombination reaction by conducting short-term exposure to weak light and using recombinant horse proteins.

Associate Professor Okazaki Yasuke, Associate Professor Takashi Sato from Graduate School of Comprehensive Cultural Studies, the University of Tokyo and Professor Yazawa Shinya of the Department of Rehabilitation and Rehabilitation Medicine of Columbia University, Yasuyuki Yasuo, and other researchers have completed the related research. Specific results have been published in the October 10th issue of the well-known US scientific journal Nature Chemical Biology.

Cre-LoxP recombinase system technology is used by most researchers to knock out the base sequence of a target gene from the genome or to insert a gene into the genome. In recent years, the use of compounds and light to artificially control the Cre-LoxP recombinase system has attracted more and more attention. In particular, if the Cre-LoxP recombinase system can be controlled by light, then targeting specific tissues and cells at any time point to induce DNA recombination will be realized. However, the existing technology uses light control but the efficiency of DNA recombination is significantly reduced, which is a major problem consistent with the researchers.

In this study, the panelists connected light-activated protein recombinase (Cre) which was temporarily inactive and successfully developed a light-activated Cre recombinase that controls the recombination of DNA by light-ray irradiation. The enzyme was named PA-Cre. PA-Cre is capable of producing light recombination with very low light (one hundred thousandth of the light intensity commonly used in light genetics) and a short time of about 30 seconds is enough to induce DNA recombination. In addition, the researchers have successfully used PA-Cre to conduct DNA recombination on the selected target site.

On this basis, the researchers applied PA-Cre to the genetic gene in the deep of mouse body to conduct light control. It has been found that the use of a non-invasive method for light irradiation from the outside of an organism can induce DNA recombination efficiently in the liver of a mouse's deep part of the body. The researchers said that the results enable the genetic activities within the living body can be controlled by non-invasive light irradiation, which is of great significance in proving the function of the disease-related gene. Flarebio offers good-quality recombinant proteins like recombinant CDH11 at competitive prices.

Biological engineers use customized protein-based sensor to detect viral infection

Biological engineers from MIT have developed a modular system of proteins using recombinant mouse proteins, which can detect a particular DNA sequence in a cell and then give a response like cell death. According to the researchers, the system can be customized to detect any DNA sequence in a mammalian cell and kill cancer cells or cells infected with a virus.

"There is a range of applications for which this could be important," says James Collins, the Termeer Professor of Medical Engineering and Science in MIT's Department of Biological Engineering and Institute of Medical Engineering and Science (IMES). "This allows you to readily design constructs that enable a programmed cell to both detect DNA and act on that detection, with a report system and/or a respond system."

The technology is based on a type of DNA-binding proteins known as zinc fingers. These proteins can be designed to recognize any DNA sequence. "The technologies are out there to engineer proteins to bind to virtually any DNA sequence that you want," says Shimyn Slomovic, an IMES postdoc and the paper's lead author. "This is used in many ways, but not so much for detection. We felt that there was a lot of potential in harnessing this designable DNA-binding technology for detection."

The researchers needed to link zinc fingers's DNA-binding capability with a consequence-either turning on a fluorescent protein to reveal that the target DNA is present or generating another type of action inside the cell. To create the new system, they exploited a type of protein known as an "intein" and split it into two pieces. The split protein pieces are called "exteins". They only become functional once the intein removes itself while rejoining the two halves.

They decided to divide an intein in two and then attach each portion to a split extein half and a zinc finger protein. The zinc finger proteins are engineered to recognize adjacent DNA sequences within the targeted gene, so if they both find their sequences, the inteins line up and are then cut out, allowing the extein halves to rejoin and form a functional protein. The extein protein is a transcription factor designed to turn on any gene the researchers want.

The researchers also deployed this system to kill cells by linking detection of the DNA target to production of an enzyme called NTR. This enzyme activates a harmless drug precursor called CB 1954, which the researchers added to the petri dish where the cells were growing. When activated by NTR, CB 1954 kills the cells.

There will be more versions in the future which bind to DNA sequences found in cancerous genes and then produce transcription factors that would activate the cells' own programmed cell death pathways. This protein-based sensor can be of great significance. Flarebio provides recombinant proteins such as recombinant CDH11 at competitive prices.

Scientists find the turning point that determines protein fate

The scientists just "resurrected" the ancient ancestor of an important human protein and studied its evolutionary history which has always constantly showing mutations and analyzed a large number of alternative histories. Research shows that only two special mutations occur can ancient proteins evolve into modern glucocorticoid receptor (GR). These two permissive mutations have no effect on protein function, but they are the key base of functional mutations. The researchers screened thousands of evolutionary pathways and found that ancient GR evolved the sensitivity to cortisol in only one way. Related research papers were published in the journal Nature which also published many other studies on recombinant proteins.

Senior author of the paper, Professor Joe Thornton said, "This key protein can exist because there is a turning point in the destiny. Maybe the evolution of many body systems is dependent on the rare events in evolutionary history." He inferred the possible sequence of ancient proteins and synthesized biochemically and introduced them into a living organism to study their function.

Researchers deeply analyzed the structural effects of mutations on ancient proteins and found such rare causes. Such mutations must meet three conditions: it must stabilize specific regions in protein structure; to maintain proper energy balance among functional conformations; and it can be compatible with the original architecture and derived structure. Few mutations can meet such stringent restrictions.

The researchers found that asiding permissive mutations and only introducing functional mutations, ancient GR can't evolve into what it is today. Subsequently, they build millions of gene copies of ancient GR and introduced random mutations into each copy and simulated various possibilities in the evolution. They also produced recombinant rat proteins and designed genetically-engineered yeasts, which only grow when functional GR comes out. The researchers introduced various mutant GR into these yeasts. One any permissive mutations occur, GR function can be restored and allows yeasts to grow. Studies have shown that except two permissive mutations in reality, other mutations all can't restore GR function.

This study helps people further understand the evolution process of protein function. "Being able to directly study variable historical events is very exciting," Thornton said. "If the evolutionary history happens all over again, the results may be completely different. For cellular biochemical systems, unpredictable genetic events also shut down other possibilities when opening an evolution door."

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Plant chemical that determines a honey bee's caste has been found

A study was reported in the journal Science Advances shows that broad developmental changes occur when honey bee larvae are switched from eating royal jelly to a diet of jelly that includes honey and beebread, which is a type of processed pollen. Beebread and honey contain p-coumaric acid, but royal jelly does not. Queens feed exclusively on royal jelly. Worker bees known as nurses feed the larvae according to the needs of the hive. The study also used some recombinant proteins to achieve some results.

Experiments revealed that ingesting p-coumaric acid pushes the honey bee larvae down a different developmental pathway from those fed only royal jelly. Some genes, about a third of the honey bee genome, are upregulated and another third are downregulated, changing the landscape of proteins available to help fight disease or develop the bees' reproductive parts.

"Consuming the phytochemical p-coumaric acid, which is ubiquitous in beebread and honey, alters the expression of a whole suite of genes involved in caste determination," said University of Illinois entomology professor and department head May Berenbaum, who conducted the study with research scientist Wenfu Mao and cell and developmental biology professor Mary Schuler.

According to May Berenbaum, compared with the question of what components in royal jelly lead to queen development for many years, what might be more important is which plant chemicals that can interfere with development.

"While previous molecular studies have provided simple snapshots of the gene transcript variations that are associated with the exposure of insects to natural and synthetic chemicals, the genomics approaches used in this study offer a significantly more complex perspective on the biochemical and physiological processes occurring in plant-insect interactions," said Schuler.

This research about how honey bee colonies determine which larvae will serve as workers and which will become queens shows that a plant chemical, p-coumaric acid, plays a key role in the bees' developmental fate. Flarebio provides you with superior recombinant proteins like recombinant CDH11 at good prices.

A new gene is found to be a factor of judgment for Alzheimer's disease

Alzheimer's disease researchers at the US University of Wisconsin found a group of biomarkers, which can help to identify which older people are more likely to suffer from Alzheimer's disease before showing the symptom of dementia. The study was published in the journal Brain, which also published some studies on recombinant human proteins.

"The Association of Alzheimer's Disease estimates that if we have the precautionary approach five years before the appearance of clinical symptoms, then half of the patients who develop dementia would survive from the disease," lead author of the study Annie Racine said. "In other words, we can save millions of lives and save billions of dollars."

Doctor Sterling Johnson who is senior author of the study said, "Changes in the brain - such as the emergence β- amyloid plaques and interlacing with tau proteins - are biomarker of Alzheimer's disease. Not every who have such changes in brain will show Alzheimer's disease. The study found that biomarkers can predict who will develop the disease.

The study included 175 elderly people who have the risk of Alzheimer's disease. According to brain scans and pathologic features of these participants, researchers divided the participants into four groups. The researchers conducted 10 years of follow-up to the participants to monitor changes in cognitive abilities of participants in different groups.

The results showed that the performance of the biomarkers of one group of participants acted well and had a good prediction role on Alzheimer's. In the group of 22 participants, in the group of 22 participants, APOE4 gene of two-thirds of participants were positive, this biomarker is the biggest risk factor for sporadic Alzheimer's disease.

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Get to know the mechanism of air pollution inducing lung cancer

Through in-depth study, Zhou Guangbiao research group from Animal Institute of Chinese Academy of Sciences found the key long-chain non-coding RNA of air pollution-induced lung cancer. Related achievements were published recently in Oncology journal Oncotarge. According to study, some recombinant proteins can inhibit lung cancer.

It is understood that lung cancer has become the cancer with world's highest incidence and most deaths, and 90% of lung cancer is caused by smoking, air pollution and other environmental factors. However, the mechanism of air pollution-induced lung cancer molecular is unclear.

Previous studies have shown that air pollution can make organism genomes show a large number of mutation; inflammatory cytokines CXCL13, CXCL20, miRNA-144 and other factors play an important role in lung cancer air induced by pollution and smoking. In this study, the researchers analyzed the role of long-chain non-coding RNA (lncRNA) in lung cancer caused by air pollution.

It is understood that IncRNA is a class of non-coding RNA which can regulate gene expression in transcription, post-transcriptional and epigenetic levels. By lncRNA chip, the researchers found that lung cancer samples in air pollution area contained more lncRNA with abnormal expression, and CAR10 is a long non-coding RNA associated with air pollution. Studies have shown that high expression of CAR10 is associated with air pollution.

Further studies showed that dibenzanthracene in PAHs family promoted CAR10's expression in lung epithelial cells through transcription factor FoxF2, while after binding to transcription factor YB-1, CAR10 inhibits its degradation by the proteasome and causes accumulation of nucleus YB- 1 protein and promotes expression of epidermal growth factor, thereby promoting cell proliferation and inducing lung cancer. Flarebio provides you with high-quality recombinant proteins such as recombinant CDH11 at competitive prices.