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05/10/2026

A study sheds light on how fathers’ diets and overweight status can impact their children’s health prior to conception. These findings could inform preventive health strategies for prospective fathers, suggesting that a healthier paternal diet reduces the risk of obesity and diseases like diabetes in their offspring.

Read this amazing article Helmholtz Munich. “Father’s diet before conception influences children’s health.” ScienceDaily. ScienceDaily, 5 June 2024. .

04/10/2026

Antigen presentation and T cell activation are shown through the close interaction between an antigen-presenting cell (APC) and a CD4⁺ T cell. An antigenic peptide is displayed on MHC class II molecules on the APC surface and recognized by the T cell receptor, with the CD4 coreceptor reinforcing this binding. Effective activation requires an additional co-stimulatory signal, represented by the interaction between B7 on the APC and CD28 on the T cell. Chemokine receptors on the T cell are also highlighted, reflecting their role in guiding cell movement and signaling during immune responses. Together, these elements illustrate the coordinated molecular events necessary for proper CD4⁺ T cell activation.

02/10/2026

The bacterial cell envelope is a highly organised structure that plays a central role in maintaining cell integrity and controlling interactions with the surrounding environment. Gram-positive bacteria are characterised by a thick peptidoglycan layer containing teichoic and lipoteichoic acids, whereas Gram-negative bacteria possess a much thinner peptidoglycan layer located between the inner membrane and an additional outer membrane containing lipopolysaccharides and porins. Although bacterial and archaeal membranes perform many comparable cellular functions, their lipid chemistry differs fundamentally: bacterial and eukaryotic membranes predominantly contain ester-linked fatty acids, while archaeal membranes are built from ether-linked isoprenoid chains attached to glycerol. These structural differences influence membrane stability, permeability and environmental adaptation, highlighting the remarkable diversity of cellular envelope architecture across microorganisms.

01/10/2026

Sensory neurons, also known as afferent neurons, are specialized nerve cells responsible for transmitting sensory information from the body’s peripheral receptors to the central nervous system (CNS), which includes the brain and spinal cord. These neurons play a crucial role in our ability to perceive and respond to changes in our environment.

They detect stimuli such as touch, temperature, pain, pressure, sound, light, and chemical changes. Each type of sensory neuron is adapted to receive specific kinds of input. For instance, photoreceptors in the eyes respond to light, while mechanoreceptors in the skin react to pressure and vibration.

Structurally, sensory neurons typically have a long axon and a cell body located outside the CNS in structures called dorsal root ganglia (for neurons coming from the body) or cranial ganglia (for those associated with the head and neck). Their dendrites are connected to sensory receptors, and once activated, they generate electrical impulses that travel along the axon to the spinal cord or brain, where the information is processed.

In summary, sensory neurons are vital components of the nervous system that act as messengers, converting external stimuli into neural signals that can be interpreted by the brain, enabling perception and coordinated responses.

28/09/2026

According to the most comprehensive study to date, the global death toll from antibiotic resistance is expected to reach 1.9 million people annually by 2050.

Read this great article at https://www.newscientist.com/article/2448102-antibiotic-resistance-forecast-to-kill-39-million-people-by-2050/

26/09/2026

Oxford Nanopore Technologies sequencing determines the nucleotide sequence of DNA or RNA by monitoring changes in ionic current as a single-stranded nucleic acid molecule passes through a biological nanopore embedded within a membrane. An applied electrical potential drives ions through the nanopore, generating a measurable current. As successive groups of nucleotides occupy the pore, their distinct physicochemical properties produce characteristic disruptions in the ionic current. These electrical signals are recorded and subsequently interpreted using computational basecalling algorithms to infer the underlying nucleotide sequence, enabling direct, real-time sequencing of individual DNA or RNA molecules.

24/09/2026

Researchers from the Mayo Clinic and the n-Lorem Foundation have reported early clinical evidence from a personalised RNA-targeted therapy developed for a patient with an ultra-rare genetic form of amyotrophic lateral sclerosis (ALS). The investigational antisense oligonucleotide nL-CHCHD-001 was designed to reduce expression of CHCHD10, targeting the molecular basis of disease in a patient carrying the pathogenic p.Arg15Leu variant. Following six intrathecal doses over 12 months, plasma neurofilament light—a biomarker of neuronal injury—decreased by approximately 50% and entered the normal reference range, while ALS functional scores and respiratory measures showed modest improvements. Published in Med, the N-of-1 study provides preliminary evidence that rapidly developed, mutation-directed RNA therapeutics could offer a highly personalised strategy for genetically defined forms of ALS, although larger studies are required to establish efficacy.

Learn more at https://www.sciencedirect.com/science/article/abs/pii/S2666634026002989/

23/09/2026

The GABA_A receptor plays a vital role in maintaining balance in the brain by controlling neuronal activity. When the neurotransmitter GABA binds to this receptor, it opens a channel that lets chloride ions (Cl⁻) flow into the neuron, reducing its activity and calming the nervous system. This receptor is made up of various subunits (α, β, γ, and others), which influence its specific function. Medications like benzodiazepines (BZs) work by enhancing its effects, making this receptor an important target in treating conditions like anxiety and insomnia.

21/09/2026

The image illustrates the CRISPR-Cas9 mechanism, a powerful tool for gene editing and antiviral defense in prokaryotes. The process begins with the expression of the CRISPR array, which includes sequences called spacers that match viral DNA segments. The CRISPR array is transcribed into a precursor CRISPR RNA (pre-crRNA), which is then processed into mature crRNA. TracrRNA binds to the crRNA, and together they form a complex with the Cas9 protein.

This mature crRNA:tracrRNA:Cas9 complex then scans the genome for a target sequence, identified by a specific Protospacer Adjacent Motif (PAM). Upon finding a match, Cas9 induces a double-strand break (DSB) in the DNA at the target site. This break leads to the degradation of the viral genome, effectively neutralizing the viral threat. The CRISPR-Cas9 system’s ability to target and cut specific DNA sequences makes it an invaluable tool for gene editing, allowing scientists to modify or silence specific genes with high precision.

20/09/2026

Antibody class-switch recombination (CSR) enables activated B cells to change the immunoglobulin heavy-chain constant region while retaining the same antigen specificity encoded by the rearranged VDJ region. In the illustrated transition from an IgM-expressing cell to an IgG2b-expressing cell, transcription of the γ2b locus generates a germline transcript and makes the Sγ2b switch region accessible to activation-induced cytidine deaminase (AID). AID initiates DNA lesions within the donor Sμ and acceptor Sγ2b regions, which are subsequently processed by DNA-repair pathways to generate double-strand breaks. Synapsis and recombination between Sμ and Sγ2b bring the VDJ region into proximity with the Cγ2b constant-region gene, while the intervening DNA containing Cμ, Cδ, Cγ3 and Cγ1 is looped out and excised as a circular DNA product. The resulting rearranged heavy-chain locus produces γ2b heavy-chain transcripts and IgG2b antibodies with unchanged antigen specificity but altered Fc-mediated effector properties. The particular downstream switch region selected determines the antibody isotype generated during CSR.

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