Antibiotics

<p>Inducer of DNA strand breaks; glycopeptide antibiotic, anti-neoplastic</p>

<p>Dihydrostreptomycin sesquisulfate is an aminoglycoside antibiotic, which is derived from the bacterium Streptomyces griseus. Its mode of action involves binding to the 30S subunit of the bacterial ribosome, leading to the disruption of protein synthesis. This binding interferes with the initiation complex formation, causing misreading of mRNA and ultimately inhibiting bacterial growth.</p>

Geneticin is very efficient against gram-negative bacteria, however it is not applied for treating infections due to high renal toxicity. Geneticin and its resistance genes found application in the selection of transgenic cell lines including yeasts such as P. pastoris and S. serevisiae, other eukaryotic cell lines such as CHO or HEK293, but also plant cells and bacterial cells.

<p>Erythromycin F is an antibiotic, which is a naturally derived product obtained from the bacterium *Streptomyces erythreus*. It operates by inhibiting bacterial protein synthesis through binding to the 50S ribosomal subunit. This binding effectively blocks the translocation steps in protein elongation, thus preventing the growth and multiplication of susceptible bacteria.</p>

<p>(+)-Madindoline A is a chemical substance that inhibits the growth of cancer cells. It has been shown to inhibit colon cancer cell proliferation and induce apoptosis by inhibiting signal pathways and suppressing inflammatory responses. (+)-Madindoline A is an experimental model for the study of bowel disease and inflammatory diseases, as it can be used to treat both bowel disease and inflammatory diseases. It also has inhibitory effects on the production of proinflammatory cytokines in human protein cells and natural compounds in experimental models. (+)-Madindoline A is found in small amounts in food compositions such as apples, carrots, cauliflower, celery, cucumbers, garlic, leeks, lettuce, onions, peas, peppers, potatoes and tomatoes.</p>

<p>Borrelidin is a potent antibiotic of the polyketide class, which is isolated from various Streptomyces species. Its mode of action is characterized by its inhibition of threonyl-tRNA synthetase, effectively disrupting protein synthesis within bacteria. Additionally, Borrelidin is known for its unique anti-angiogenic properties, which result from the inhibition of endothelial cell proliferation, making it a compound of interest in cancer research.</p>

<p>Ascomycin is an immunosuppressant macrolide lactone, which is derived from the soil bacterium *Streptomyces hygroscopicus*. It functions primarily by inhibiting the T-cell activation pathway. The mechanism involves binding to the immunophilin FKBP-12, forming a complex that inhibits the calcium-dependent phosphatase, calcineurin. This inhibition prevents the dephosphorylation and subsequent translocation of nuclear factor of activated T cells (NFAT), which is crucial for the transcription of interleukin-2 and other cytokines. Consequently, this suppresses the activation and proliferation of T-cells, which are essential components of the adaptive immune response.</p>

<p>Cefquinome is a broad-spectrum antibiotic, which is a fourth-generation cephalosporin. It is derived from the β-lactam class of antibiotics and is specifically designed for veterinary applications. Its mode of action involves the inhibition of bacterial cell wall synthesis, leading to cell lysis and death. This action is facilitated through the binding of cefquinome to penicillin-binding proteins, which undermines the structural integrity of bacterial cell walls, proving effective against both Gram-positive and Gram-negative bacteria.</p>

<p>Pirlimycin HCl is an antibacterial product, which is a semi-synthetic derivative of the natural antibiotic lincomycin produced by Streptomyces lincolnensis. Its mode of action involves the inhibition of bacterial protein synthesis by binding to the 50S ribosomal subunit, thereby preventing the elongation of peptide chains. This action is particularly effective against Gram-positive bacteria, including Staphylococcus and Streptococcus species.</p>

<p>11-Deoxyfusidic acid is a steroidal antibiotic, which is derived from the fermentation broth of certain strains of fungi, specifically within the Fusidium genus. Its mode of action involves inhibiting bacterial protein synthesis by interacting with elongation factor G (EF-G) on the ribosome, thus disrupting essential processes and impeding bacterial growth.</p>

Boromycin is a macrolide antibiotic, which is derived from the fermentation of certain strains of Streptomyces bacteria. It operates as an ionophore with the ability to transport ions across lipid membranes, effectively disrupting ionic gradients. This mechanism of action compromises essential cellular processes in target organisms, thereby exerting its antimicrobial effects.

<p>Streptidine dihydrochloride is a biochemical compound, specifically a derivative of streptomycin, which is obtained through chemical modification of the aminoglycoside antibiotic streptomycin. It is composed of streptidine, a constituent sugar derivative, that is integral to the structure of streptomycin, rendered as a hydrochloride salt to enhance solubility and stability.</p>

<p>Cefotaxime sodium - Sterile grade is a cephalosporin antibiotic, which is derived from the beta-lactam class of antibacterial agents. It effectively disrupts bacterial cell wall synthesis by binding to and inhibiting penicillin-binding proteins, leading to cell lysis and death. This mechanism of action is potent against a variety of Gram-positive and Gram-negative bacteria, making it a valuable tool in clinical settings.</p>

<p>14-Chloro daunorubicin is a chemotherapeutic agent, which is a synthetic derivative of the naturally occurring anthracycline antibiotic, daunorubicin. This compound is specifically modified to include a chlorine atom at the 14th position, which enhances its pharmacological effectiveness compared to its parent compound. The drug acts primarily by intercalating into DNA, disrupting the function of topoisomerase II, and generating free radicals. These mechanisms collectively inhibit DNA replication and transcription, leading to cell apoptosis, particularly in rapidly dividing cancer cells.</p>

<p>Clindamycin sulfoxide is a potent metabolite of the lincosamide antibiotic clindamycin, which is derived from the fermentation product of *Streptomyces lincolnensis*. This compound acts by inhibiting bacterial protein synthesis through binding to the 50S ribosomal subunit, thereby interfering with the translocation steps in protein elongation. The mechanism effectively suppresses the growth of a broad range of Gram-positive bacteria, including *Staphylococcus aureus*, *Streptococcus pneumoniae*, and anaerobic microorganisms.</p>

<p>Cefacetrile sodium is a broad-spectrum antibiotic belonging to the cephalosporin class. It is a semi-synthetic derivative sourced from cephalosporin C, a naturally occurring compound derived from the Acremonium fungus. Its mode of action involves the inhibition of bacterial cell wall synthesis. This occurs by binding to penicillin-binding proteins within the bacterial cell membrane, ultimately leading to cell lysis and death due to the inability to synthesize peptidoglycan, a critical component of the bacterial cell wall.</p>

Ceftizoxime alapivoxil is a prodrug antibiotic, which is derived from ceftizoxime, a third-generation cephalosporin. This semi-synthetic source enables the compound to effectively combat a wide range of bacterial infections by improving oral bioavailability compared to its parent compound. Once administered, ceftizoxime alapivoxil is metabolized in the body to release ceftizoxime, which exerts its antibacterial activity by binding to penicillin-binding proteins (PBPs) on bacterial cell walls. This binding action inhibits the transpeptidation step critical for cell wall synthesis, leading to cell lysis and bacterial death.

<p>Nafcillin sodium monohydrate is a beta-lactam antibiotic, which is derived from the penicillin class of antimicrobials. It is specifically a semi-synthetic penicillin and is commonly sourced through chemical synthesis to enhance its stability and spectrum of activity. Nafcillin primarily exerts its bactericidal effects by inhibiting bacterial cell wall synthesis. It achieves this through its strong affinity for penicillin-binding proteins (PBPs), which are essential for maintaining the bacterial cell wall structure. By disrupting the formation of peptidoglycan cross-links, nafcillin effectively weakens the bacterial cell wall, leading to cell lysis and death, especially in gram-positive bacteria such as Staphylococcus aureus, including methicillin-sensitive strains (MSSA).</p>

<p>Oligomycin A is a macrolide antibiotic, which is isolated from the Streptomyces species of bacteria. Its mode of action involves inhibiting ATP synthase by binding to the F_O subunit of the enzyme complex in the mitochondrial membrane. This binding effectively stops the flow of protons across the membrane, which is critical for ATP generation through oxidative phosphorylation.</p>

<p>Fosmidomycin sodium is an antibiotic compound, which is derived from phosphonic acid. It functions as an inhibitor of the enzyme 1-deoxy-D-xylulose 5-phosphate reductoisomerase (DXR), crucial in the non-mevalonate pathway of isoprenoid biosynthesis. By targeting this enzyme, fosmidomycin sodium disrupts the production of isoprenoids, essential components for the growth and survival of certain bacteria and parasites.</p>