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Related Concept Videos

Coordination Number and Geometry02:57

Coordination Number and Geometry

19.1K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
19.1K
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

27.0K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
27.0K
Hypertension IV: Drug Therapy and Lifestyle Modifications01:28

Hypertension IV: Drug Therapy and Lifestyle Modifications

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Multiple classes of antihypertensive medications are employed in treating hypertension. The most commonly recommended first-line treatments include:Thiazide Diuretics, such as chlorthalidone, increase sodium and water excretion from the body, reducing blood volume and blood pressure.Angiotensin-converting enzyme inhibitors, like lisinopril, block the conversion of angiotensin I to II, a potent vasoconstrictor lowering blood pressure.Angiotensin II Receptor Blockers (ARBs) prevent angiotensin II...
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Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

9.3K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
9.3K
Urinary Tract Calculi IV: Nutrition Therapy and Prevention01:27

Urinary Tract Calculi IV: Nutrition Therapy and Prevention

455
Management of renal calculi focuses on effective strategies like tailored nutrition and hydration therapy. Adjusting diet and fluid intake reduces stone formation and recurrence, making these interventions simple yet powerful in kidney stone prevention and management.Understanding Kidney StonesKidney stones form when calcium, oxalate, uric acid, and cystine concentrate and crystallize in urine. Factors contributing to their formation include genetic predisposition, certain medical conditions,...
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Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

12.6K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
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Anticancer Efficacy of Photodynamic Therapy with Lung Cancer-Targeted Nanoparticles
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Coordination Complexes of Titanium(IV) for Anticancer Therapy.

Edit Y Tshuva, Maya Miller

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    Titanium(IV) coordination complexes show promise as anticancer drugs due to low toxicity and safe hydrolysis products. Despite early challenges with stability and formulation, newer titanium complexes demonstrate significant efficacy and improved stability for cancer treatment.

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    Area of Science:

    • Inorganic Chemistry
    • Medicinal Chemistry
    • Materials Science

    Background:

    • Platinum-based chemotherapy has been successful but faces challenges like toxicity and resistance.
    • Titanium(IV) coordination complexes offer a low-toxicity alternative with a beneficial hydrolysis pathway to inert titanium dioxide.
    • Early titanium complexes like titanocene dichloride showed promise but failed clinical trials due to hydrolysis, aggregation, and formulation issues.

    Purpose of the Study:

    • To review the development and potential of titanium(IV) coordination complexes as anticancer agents.
    • To address the challenges of hydrolytic instability and explore strategies for improving titanium complex efficacy and delivery.
    • To highlight recent advancements in titanium complex design, focusing on stability and therapeutic potential.

    Main Methods:

    • Review of existing literature on titanium(IV) coordination complexes in cancer treatment.
    • Analysis of structure-activity relationships and the impact of ligand design on complex stability and efficacy.
    • Investigation of mechanistic insights, including DNA interaction and apoptosis induction.

    Main Results:

    • Early titanium complexes (titanocene dichloride, budotitane) demonstrated efficacy but suffered from rapid hydrolysis and poor stability.
    • Derivative development improved anticancer features, with some complexes matching or exceeding cisplatin's performance.
    • Recent phenolato-based and non-labile ligand complexes exhibit significantly enhanced hydrolytic stability and potent in vitro/in vivo anticancer activity with minimal toxicity.

    Conclusions:

    • Titanium(IV) coordination complexes are promising anticancer agents, offering a favorable toxicity profile compared to platinum drugs.
    • Overcoming hydrolytic instability through rational ligand design is crucial for clinical translation.
    • Advanced titanium complexes with improved stability and demonstrated efficacy represent a viable future direction for cancer chemotherapy.