Scientists are manipulating the code of life with unprecedented precision, and a revolution that is changing medicine, agriculture, and biomanufacturing is quietly happening in laboratories around the world.
A Chinese research team transplanted the left lung of a Bama pig, which had undergone six gene edits, into a brain dead individual. The transplanted lung maintained ventilation and gas exchange function for up to 9 days without any hyperacute rejection reactions.
This marks a crucial step forward in the field of xenotransplantation, which is expected to alleviate the global shortage of organ transplant donors.
At the same time, the team of the Chinese Academy of Sciences has developed a new programmable chromosome editing technology, which has achieved multi type precise manipulation of DNA from thousand base to trillion base levels, and is known as "a major breakthrough in the field of genetic engineering".
01 Heterogeneous organ transplantation, solving the shortage problem
Organ shortage has always been the biggest challenge faced by transplant medicine. Every year, tens of thousands of patients worldwide die while waiting for organ transplants. Xenotransplantation - transplanting animal organs into the human body - may be the key to solving this problem.
The breakthrough achieved by the Chinese team is exciting. Professor He Jianxing's team from Guangyi First Hospital successfully transplanted gene edited pig lungs into brain dead individuals. The donor pig undergoes six gene edits to reduce the immune risk after transplantation into the human body.
Postoperative monitoring data showed that the transplanted lung maintained function for up to 9 days without any hyperacute rejection reactions, and synchronous pathogen monitoring did not detect any signs of active infection.
Beatrice Dominguez Hilde, Director of the Spanish National Transplantation Organization, commented, "Previous xenotransplantation trials were limited to kidneys, hearts, and livers. Compared to them, xenotransplantation of lungs faces greater challenges
02 Gene editing technology, precise manipulation of life code
Chinese scientists have also made significant breakthroughs in the field of gene editing. Gao Caixia's team from the Institute of Genetics and Developmental Biology, Chinese Academy of Sciences has developed a new programmable chromosome editing technology.
This technology has achieved precise manipulation of multiple types of DNA from kilobase to megabase levels in the genetic manipulation of animals and plants, significantly improving the manipulation scale and ability of eukaryotic genomes.
By utilizing this precise manipulation technology of large DNA fragments, researchers can not only achieve multi gene stacking editing, but also open up new paths for crop trait improvement and genetic disease treatment by manipulating genomic structural variations.
The reviewer evaluated that this work represents a significant breakthrough in the field of genetic engineering and has enormous potential for application in breeding and gene therapy.
03 AI driven discovery, CRISPR system newly upgraded
Artificial intelligence is accelerating innovation in the field of biotechnology. A research team from Zhejiang Laboratory and Shanghai Jiao Tong University School of Medicine used natural language processing technology to treat protein sequences as "biological language".
Using the Evolutionary Scale Language Model (ESM), they developed the AIL Scan classifier, which achieved an accuracy of 98.22% in recognizing Cas proteins, significantly better than traditional methods.
The research team successfully identified 7 unrecorded Cas12a subtypes, which possess unique PAM recognition characteristics and nuclease activity.
Through experimental verification, it was found that new nucleases such as AmCas12a have unique temperature dependence and metal ion preference, and can recognize a wider range of PAM sequences, breaking through the limitations of traditional TTTV sequences.
04 Innovation in Synthetic Biology, Efficient Production in Microbial Factories
The field of synthetic biology is also undergoing revolutionary changes. British scientists have successfully designed a strain of Escherichia coli called Syn57, which has a streamlined 57 codon genetic code that is 7 fewer than the 64 codons found in natural organisms.
This innovative design makes bacteria resistant to viruses, improves biotechnology efficiency, and can be used for drug production and new material development.
Researchers have meticulously rewritten the entire genome of bacteria, eliminating redundant codons and making over 101000 precise changes.
The domestic research team has made progress in solving the bottleneck problems of low transformation efficiency and unstable large plasmids in sports fermentation bacteria as synthetic biology chassis cells.
They optimized the expression of the β - carotene gene cluster by constructing a promoter terminator element library, and innovatively knocked out restriction modification system genes and DNA repair genes, resulting in an increase in the efficiency of the 9.5kb reporter plasmid electroporation and the highest reported level of β - carotene production.
05 New strategy for cancer treatment, precise intervention of synthetic biology
The progress of synthetic biology has also provided innovative strategies for cancer treatment. The team of Associate Researcher Zeng Xuemei from Fujian Normal University has developed a microwave activated bacterial robot（ Cu2O@EG ）By engineering the modification of Escherichia coli, it can be precisely activated by external microwaves in the tumor microenvironment.
The system expresses glucose oxidase, which rapidly consumes glucose within the tumor and generates hydrogen peroxide; At the same time, copper oxide nanoparticles loaded on the surface of bacteria catalyze H2O2 to produce highly reactive oxygen species through Fenton like reactions, simultaneously inducing triple killing of tumor cells by apoptosis, iron death, and copper death, and activating immune responses.
Animal experiments have confirmed that this therapy can efficiently disrupt tumor metabolism, reverse the immunosuppressive microenvironment, and avoid damage to healthy tissues due to the temporal and spatial controllability of microwaves.
06 Gene therapy safety upgrade, human source system reduces risks
The safety of gene therapy has always been a key factor limiting its clinical application. A team from Zhejiang University has developed a novel system based on human derived transcriptional activation domains to address potential immunogenicity issues in the CRISPR activation system.
Researchers systematically compared the activation efficiency of human transcriptional activation domains and developed combinatorial human transcriptional activation domains such as NFZ-p65HSF1.
These novel activation domains exhibit gene activation efficiency comparable to classical virus TAD-VPR in the dCas9/dCasMINI system, while having smaller molecular sizes and lower predictive immunogenicity.
The NP (NFZ-p65HSF1) combination developed through research has an activation factor of up to 55000 times for the hemoglobin gamma gene, and the dCasMINI system has further reduced the size of the vector, providing a better solution for in vivo gene therapy.
07 Coexistence of Technology Ethics, Balanced Development of Biotechnology
With the rapid development of biotechnology, ethical issues are becoming increasingly prominent. The ethical controversy caused by gene editing technology, especially embryonic gene editing, is particularly prominent.
In 2024, a couple in Shenzhen used PGD technology to screen embryos and refused to carry the "myopia gene", which sparked global discussion.
Supporters believe that 'this is an advancement in eugenics that can reduce suffering,' while opponents argue that 'we are creating a genetic aristocracy that exacerbates social inequality.'.
Ecologist Dr. Chen raised concerns: "If all humans live long, will the Earth become a crowded nursing home
An academician of the Chinese Academy of Sciences said, "Evolution has never stopped, it's just that humans have become its collaborators for the first time
As more laboratories combine artificial intelligence with genetic technology, the speed of biological evolution is accelerating tens of thousands of times.
Bacteria evolve drug resistance within 10 days, while pepper moths complete skin color reversal in 8 years.
These technologies are not only limited to laboratories, but are also entering millions of households. In the hospital, 500 patients are cured of familial breast cancer by gene therapy every month, and their genes are modified to "anti-cancer mode".
The integration of synthetic biology, gene editing, and artificial intelligence is driving life sciences towards a more precise and programmable future.
