Dapagliflozin

Voies de synthèse et conditions de réaction : La synthèse de la dapagliflozine implique plusieurs étapes clés :

Préparation du réactif de Grignard : La matière première initiale, le 1-chloro-2-(4-éthoxybenzyl)-4-iodobenzène, réagit avec du magnésium en utilisant des granulés d'iode comme initiateur pour préparer un réactif de Grignard.

Réaction de bromation : Le sucre peracétylé réagit avec le bromure d'hydrogène dans une solution d'acide acétique pour préparer le bromure de 2,3,4,6-tétraacétylglucosamine.

Formation du composé intermédiaire : Le réactif de Grignard est ajouté à une solution de méthylbenzène/tétrahydrofurane, suivie de l'ajout d'un catalyseur de terres rares et de bromure de 2,3,4,6-tétraacétylglucosamine, ce qui donne un composé intermédiaire.

Hydrolyse et recristallisation : Le composé intermédiaire subit une hydrolyse alcaline dans une solution de tétrahydrofurane/éthanol/eau d'hydroxyde de sodium, suivie d'une recristallisation pour obtenir la dapagliflozine.

Méthodes de production industrielle : La production industrielle de la dapagliflozine suit des voies de synthèse similaires, mais à plus grande échelle, en garantissant une grande pureté et un rendement élevé. Le processus implique des mesures strictes de contrôle de la qualité afin de minimiser les impuretés et d'assurer la cohérence du produit final .

Types de réactions :

Oxydation : La dapagliflozine peut subir des réactions d'oxydation, conduisant à la formation de métabolites tels que l'oxo dapagliflozine.

Réduction : Les réactions de réduction peuvent convertir la dapagliflozine en ses formes réduites.

Substitution : Des réactions de substitution peuvent se produire à diverses positions sur la molécule de dapagliflozine, conduisant à la formation de différents dérivés.

Réactifs et conditions courants :

Oxydation : Les agents oxydants courants comprennent le peroxyde d'hydrogène et le permanganate de potassium.

Réduction : Des agents réducteurs tels que le borohydrure de sodium et l'hydrure de lithium et d'aluminium sont utilisés.

Substitution : Divers agents halogénants et nucléophiles sont utilisés dans les réactions de substitution.

Principaux produits :

Dapagliflozine hydroxy benzylique : Formée par hydroxylation.

Oxo dapagliflozine : Formée par oxydation.

Deséthyl dapagliflozine : Formée par déséthylation.

4. Applications de la recherche scientifique

La dapagliflozine a un large éventail d'applications de recherche scientifique :

Chimie : Utilisée comme composé modèle pour étudier le comportement des inhibiteurs du cotransporteur sodium-glucose 2.

Biologie : Investigated for its effects on glucose metabolism and renal function.

Médecine : Étudiée de manière approfondie pour ses effets thérapeutiques dans le traitement du diabète de type 2, de l'insuffisance cardiaque et de la maladie rénale chronique. .

Industrie : Utilisée dans le développement de nouveaux produits pharmaceutiques ciblant la régulation du glucose et la santé cardiovasculaire.

5. Mécanisme d'action

La dapagliflozine agit en inhibant le cotransporteur sodium-glucose 2 dans les tubules rénaux proximaux. Ce transporteur est responsable de la réabsorption du glucose depuis la lumière tubulaire. En inhibant ce transporteur, la dapagliflozine réduit la réabsorption du glucose, ce qui entraîne une augmentation de l'excrétion du glucose dans l'urine. Cela entraîne une diminution du taux de glucose dans le sang. De plus, la dapagliflozine réduit la réabsorption du sodium, ce qui peut influencer plusieurs fonctions physiologiques, notamment l'abaissement de la précharge et de la postcharge du cœur et la régulation négative de l'activité sympathique .

Composés similaires :

• Empagliflozine
• Canagliflozine
• Ipragliflozine

Comparaison :

• Empagliflozine : La dapagliflozine et l'empagliflozine sont toutes deux des inhibiteurs du cotransporteur sodium-glucose 2 utilisés pour traiter le diabète de type 2. la dapagliflozine a montré un risque plus élevé d'hospitalisation pour insuffisance cardiaque par rapport à l'empagliflozine .
• Canagliflozine : Tout comme la dapagliflozine, la canagliflozine est utilisée pour traiter le diabète de type 2 et présente des avantages supplémentaires en réduisant les événements cardiovasculaires. La canagliflozine a été associée à un risque plus élevé d'amputations des membres inférieurs.
• Ipragliflozine : Un autre inhibiteur du cotransporteur sodium-glucose 2 avec des effets hypoglycémiants similaires. la dapagliflozine a un profil de sécurité plus favorable en termes d'infections génitales .

La dapagliflozine se distingue par ses avantages complets dans le traitement du diabète de type 2, de l'insuffisance cardiaque et de la maladie rénale chronique, ainsi que par son profil de sécurité relativement favorable.

Management of Type 2 Diabetes Mellitus

Efficacy in Glycemic Control

Dapagliflozin is primarily indicated for the treatment of Type 2 diabetes mellitus. Clinical trials have demonstrated its efficacy in lowering blood glucose levels and promoting weight loss. For instance, a study indicated that this compound significantly reduced HbA1c levels compared to placebo across various age groups, with consistent results showing reductions of approximately 0.5% to 0.6% after one year of treatment .

Weight Loss and Cardiovascular Benefits

In addition to glycemic control, this compound has been associated with weight loss. Patients treated with this compound showed a greater likelihood of achieving a 5% weight loss compared to those on placebo . Furthermore, it has been linked to cardiovascular benefits, reducing the risk of cardiovascular death and hospitalization for heart failure .

Heart Failure Management

Heart Failure with Reduced Ejection Fraction

This compound has shown significant benefits in patients with heart failure with reduced ejection fraction (HFrEF). The DAPA-HF trial demonstrated that this compound reduced the risk of cardiovascular death and hospitalization for heart failure in these patients, regardless of the presence of diabetes .

Heart Failure with Preserved Ejection Fraction

Recent studies have also highlighted the efficacy of this compound in heart failure with preserved ejection fraction (HFpEF). In the DELIVER trial, this compound led to early and sustained reductions in clinical events related to worsening heart failure, with significant benefits observed within two weeks of treatment initiation .

Renal Protection

Chronic Kidney Disease

This compound has shown promise in protecting renal function among patients with chronic kidney disease (CKD). Evidence suggests that it may slow the progression of kidney disease and reduce the risk of end-stage renal disease . A study utilizing organ-on-a-chip models indicated that this compound could reduce cyst growth in polycystic kidney disease models, suggesting potential applications in renal pathology .

Pharmacokinetics and Administration Routes

Transdermal Delivery Systems

Recent research has explored alternative delivery methods for this compound, including transdermal patches. A study involving minipigs found that repeated application of this compound patches significantly increased drug accumulation in serum and tissues, indicating potential for effective transdermal delivery systems . This could enhance patient compliance and expand therapeutic options.

Data Summary Tables

Case Studies

• DAPA-HF Trial : In this landmark trial involving patients with HFrEF, this compound was shown to significantly reduce hospitalizations for heart failure by 26% compared to placebo over a median follow-up period .
• DELIVER Trial : This trial focused on patients with HFpEF and found that this compound led to a significant reduction in cardiovascular events within just two weeks of starting treatment .
• Renal Study Using Organ-on-a-Chip : Research demonstrated that this compound could reduce cyst growth in polycystic kidney disease models, highlighting its potential role in renal protection strategies .

Dapagliflozin works by inhibiting the sodium-glucose co-transporter 2 in the proximal renal tubules. This transporter is responsible for the reabsorption of glucose from the tubular lumen. By inhibiting this transporter, this compound reduces glucose reabsorption, leading to increased urinary glucose excretion. This results in lower blood glucose levels. Additionally, this compound reduces sodium reabsorption, which may influence several physiological functions, including lowering both pre- and afterload of the heart and downregulation of sympathetic activity .

• Empagliflozin
• Canagliflozin
• Ipragliflozin

Comparison:

• Empagliflozin: Both dapagliflozin and empagliflozin are sodium-glucose co-transporter 2 inhibitors used to treat type 2 diabetes. this compound has shown a higher risk of hospitalization for heart failure compared to empagliflozin .
• Canagliflozin: Similar to this compound, canagliflozin is used to treat type 2 diabetes and has additional benefits in reducing cardiovascular events. canagliflozin has been associated with a higher risk of lower limb amputations.
• Ipragliflozin: Another sodium-glucose co-transporter 2 inhibitor with similar glucose-lowering effects. this compound has a more favorable safety profile in terms of genital infections .

This compound stands out due to its comprehensive benefits in treating type 2 diabetes, heart failure, and chronic kidney disease, along with its relatively favorable safety profile.

Dapagliflozin is a selective sodium-glucose cotransporter 2 (SGLT2) inhibitor, primarily used in the management of type 2 diabetes mellitus (T2DM). Its biological activity is characterized by its mechanism of action, pharmacokinetics, efficacy in clinical settings, and safety profile. This article delves into these aspects, supported by data from various studies.

This compound functions by inhibiting SGLT2, which is predominantly located in the proximal tubule of the nephron. This transporter is responsible for approximately 90% of glucose reabsorption in the kidneys. By blocking SGLT2, this compound promotes the excretion of glucose through urine, thereby aiding in glycemic control and potentially leading to weight loss in patients with T2DM .

Pharmacokinetics

• Absorption : this compound is rapidly absorbed after oral administration, with maximum plasma concentrations occurring within 2 hours. The bioavailability is around 78% with a 10 mg dose taken once daily .
• Metabolism : It undergoes glucuronidation to form inactive metabolites, primarily mediated by UGT1A9. The terminal half-life is approximately 13 hours .
• Elimination : The drug and its metabolites are primarily excreted via urine, with about 15% excreted unaltered through feces .

Efficacy in Clinical Studies

This compound has been extensively studied for its efficacy in lowering blood glucose levels and improving other metabolic parameters. Below are key findings from notable clinical trials:

Safety Profile

The safety of this compound has been evaluated across multiple studies. Notably, it was found not to significantly prolong the QTc interval at doses up to 150 mg, indicating a favorable cardiac safety profile . Common adverse effects include urinary tract infections and genital mycotic infections due to increased glucose excretion.

Case Study 1: Efficacy in Elderly Patients

In a study focusing on elderly patients (≥65 years), this compound demonstrated consistent reductions in HbA1c compared to placebo across all age groups. The hazard ratio for cardiovascular death or hospitalization for heart failure was noted at 0.88, suggesting significant benefits even in older populations .

Case Study 2: Combination Therapy

Another case involved patients with T2DM receiving this compound in combination with saxagliptin. This combination therapy led to enhanced glycemic control and a notable decrease in albuminuria over a 24-week period .

Q. What are the key methodological considerations when designing a clinical trial to evaluate dapagliflozin’s cardiorenal benefits in non-diabetic populations?

Answer:
Trials should prioritize patient stratification by comorbidities (e.g., heart failure [HF] or chronic kidney disease [CKD]) and ensure endpoints reflect clinically relevant outcomes (e.g., composite of cardiovascular death and HF hospitalization). The DAPA-HF trial (NCT03036124) demonstrated efficacy in both diabetic and non-diabetic HFrEF patients by using a placebo-controlled, double-blind design with rigorous inclusion criteria (NYHA class II–IV, ejection fraction ≤40%) . Methodological rigor includes pre-specified subgroup analyses to assess treatment heterogeneity and standardized safety monitoring for volume depletion or renal events.

Q. How can population pharmacokinetic (PK) modeling address covariate effects on this compound exposure across patient subgroups?

Answer:
Population PK models should incorporate covariates such as renal function, body mass index, and diabetes status to quantify variability in drug exposure. For example, a phase IIa/III study used nonlinear mixed-effects modeling to identify baseline glomerular filtration rate (GFR) and albuminuria as key covariates influencing this compound’s PK in type 1 diabetes mellitus (T1DM) patients, enabling dose adjustments for renal impairment . Advanced modeling software (e.g., NONMEM) and bootstrapping validation are critical for robustness.

Q. What analytical techniques are recommended for stability profiling and impurity detection in this compound formulations?

Answer:
Reverse-phase high-performance liquid chromatography (RP-HPLC) coupled with Design of Experiments (DOE) optimizes parameters like mobile phase composition and column temperature. A validated RP-HPLC method achieved separation of this compound from six process-related impurities using a C18 column and gradient elution (acetonitrile-phosphate buffer). Forced degradation studies under ICH conditions (acid/base hydrolysis, oxidation) identified major degradants, with LC-MS/MS confirming structural changes .

Q. How should researchers reconcile conflicting data on this compound’s metabolic effects in heart failure using targeted metabolomics?

Answer:
Targeted metabolomics can clarify mechanisms by quantifying pathway-specific biomarkers (e.g., acylcarnitines, amino acids). The DEFINE-HF trial (NCT02653482) used principal component analysis (PCA) to cluster metabolites, revealing that this compound increased ketone-related and medium-chain acylcarnitines—suggesting enhanced fatty acid oxidation—without inducing pathological ketosis. Adjusting for false discovery rates (FDR) and baseline covariates mitigates false-positive associations .

Q. What challenges arise in extrapolating this compound’s efficacy from randomized controlled trials (RCTs) to real-world settings?

Answer:
Real-world studies must address confounding factors (e.g., adherence, comorbidities) through propensity score matching or inverse probability weighting. A 2023 retrospective cohort study replicated RCT findings by demonstrating HbA1c reductions (−0.8%) and weight loss (−1.5 kg) in Indian T2DM patients on this compound + metformin, but emphasized rigorous exclusion criteria to mirror RCT populations . Sensitivity analyses and subgroup stratification enhance generalizability.

Q. How can pediatric trials for this compound address safety and efficacy gaps in type 1 diabetes (T1DM)?

Answer:
Pediatric trials require adaptive designs with dose-escalation phases and frequent safety monitoring for diabetic ketoacidosis (DKA). A 2022 systematic review highlighted the need for long-term studies in T1DM, as existing pediatric data are limited to single-dose pharmacokinetics. Incorporating continuous glucose monitoring (CGM) and ketone sensors improves safety assessments .

Q. What statistical approaches resolve contradictions in this compound’s renoprotective effects across heterogeneous CKD populations?

Answer:
Bayesian hierarchical models or meta-regression can account for heterogeneity in baseline proteinuria or GFR. The DAPA-CKD trial (NCT03036150) stratified outcomes by albumin-to-creatinine ratio (UACR), showing consistent renal benefits. Sensitivity analyses should test the robustness of effect estimates across subgroups, while competing risk models address mortality as a confounder .

Q. How does DOE enhance robustness in developing this compound quantification methods?

Answer:
DOE systematically optimizes HPLC parameters (e.g., flow rate, pH) using factorial designs. A study employing central composite design (CCD) identified sodium lauryl sulfate concentration and wavelength (225 nm) as critical factors for this compound quantification, achieving a linear range of 2–12 µg/mL with R² >0.999. Validation followed ICH Q2(R1) guidelines for accuracy (±2%) and precision (RSD <2%) .

Q. What mechanisms underlie this compound’s cardioprotective effects beyond glucose control?

Answer:
Preclinical models suggest hemodynamic improvements (reduced preload/afterload) and anti-inflammatory effects via NLRP3 inflammasome inhibition. Clinical metabolomic data link this compound to increased β-hydroxybutyrate (a cardioprotective ketone) and reduced aromatic amino acids (associated with HF progression). Mechanistic trials should integrate transcriptomic and proteomic profiling .

Q. How do researchers validate novel biomarkers for this compound response in diabetic kidney disease (DKD)?

Answer:
Cohort studies with longitudinal biospecimen collection (e.g., urine TGF-β1, serum TNF-α) paired with GFR slope analysis are essential. The DERIVE study (NCT02413398) used machine learning to identify urinary C-mannosyl tryptophan as a predictive biomarker for this compound’s albuminuria-lowering effect. Replication in independent cohorts and assay standardization (e.g., ELISA vs. mass spectrometry) ensure validity .