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Sekar V, Vedhachalam D, Vb A, Sivaraman S, Janakarajan V, Sethuraman S, Shiroor SG, Geoffroy JMM. Combating Alcohol Adduct Impurity in Immunosuppressant Drug Product Manufacturing: A Scientific Investigation for Enhanced Process Control. Pharm Res 2024; 41:983-1006. [PMID: 38561580 DOI: 10.1007/s11095-024-03695-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 03/21/2024] [Indexed: 04/04/2024]
Abstract
OBJECTIVE This research aims to elucidate critical impurities in process validation batches of tacrolimus injection formulations, focusing on identification and characterization of previously unreported impurity at RRT 0.42, identified as the tacrolimus alcohol adduct. The potential root causes for the formation of new impurity was determined using structured risk assessment by cause and effect fishbone diagram. The primary objective was to propose mitigation plan and demonstrate the control of impurities with 6 month accelerated stability results in development batches. METHODS The investigation utilizes method validation and characterization studies to affirm the accuracy of quantifying the tacrolimus alcohol adduct. The research methodology employed different characterization techniques like rotational rheometer, ICP‒MS, MALDI-MS, 1H NMR, 13C NMR, and DEPT-135 NMR for structural elucidation. Additionally, the exact mass of the impurity is validated using electrospray ionization mass spectra. RESULTS Results indicate successful identification and characterization of the tacrolimus alcohol adduct. The study further explores the transformation of Tacrolimus monohydrate under various conditions, unveiling the formation of Tacrolimus hydroxy acid and proposing the existence of a novel degradation product, the Tacrolimus alcohol adduct. Six-month data from development lots utilizing Manufacturing Process II demonstrate significantly lower levels of alcohol adducts. CONCLUSIONS Manufacturing Process II, selectively locates Tacrolimus within the micellar core of HCO-60, this prevent direct contact of ethanol with Tacrolimus which minimizes impurity alcohol adduct formation. This research contributes to the understanding of tacrolimus formulations, offering ways to safeguard product integrity and stability during manufacturing and storage.
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Affiliation(s)
- Vasanthakumar Sekar
- Pfizer Healthcare India Private Limited, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 8th Floor, Block C, IIT Madras Research Park, Kanagam Road, Taramani, Chennai, India, 600113.
| | - Devarajan Vedhachalam
- Pfizer Healthcare India Private Limited, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 8th Floor, Block C, IIT Madras Research Park, Kanagam Road, Taramani, Chennai, India, 600113
| | - ArunKumar Vb
- Pfizer Healthcare India Private Limited, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 8th Floor, Block C, IIT Madras Research Park, Kanagam Road, Taramani, Chennai, India, 600113
| | - Sivananthan Sivaraman
- Pfizer Healthcare India Private Limited, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 8th Floor, Block C, IIT Madras Research Park, Kanagam Road, Taramani, Chennai, India, 600113
| | - Venkatakrishnan Janakarajan
- Pfizer Healthcare India Private Limited, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 8th Floor, Block C, IIT Madras Research Park, Kanagam Road, Taramani, Chennai, India, 600113
| | - Sai Sethuraman
- Pfizer Healthcare India Private Limited, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 8th Floor, Block C, IIT Madras Research Park, Kanagam Road, Taramani, Chennai, India, 600113
| | - Sandeep G Shiroor
- Pfizer, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 375 North Field Drive, Lake Forest, Illinois, 60045, USA
| | - Jean-Marie M Geoffroy
- Pfizer, Medicinal Sciences-Pharmaceutical Sciences Small Molecules, Pfizer Research & Development, 375 North Field Drive, Lake Forest, Illinois, 60045, USA
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Kale A, Shelke V, Lei Y, Gaikwad AB, Anders HJ. Voclosporin: Unique Chemistry, Pharmacology and Toxicity Profile, and Possible Options for Implementation into the Management of Lupus Nephritis. Cells 2023; 12:2440. [PMID: 37887284 PMCID: PMC10605893 DOI: 10.3390/cells12202440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/28/2023] Open
Abstract
Calcineurin inhibitors (CNI) can suppress allo- and autoimmunity by suppressing T cell function but also have anti-proteinuric effects by stabilizing the cellular components of the kidney's filtration barrier. Therefore, CNI are used in autoimmune kidney diseases with proteinuria. However, the traditional CNI, cyclosporine A and tacrolimus, have a narrow therapeutic range, need monitoring of drug levels, and their use is associated with nephrotoxicity and metabolic alterations. Voclosporin (VOC), a novel CNI, no longer requires drug level monitoring and seems to lack these adverse effects, although hypertension and drug-drug interactions still occur. VOC demonstrated efficacy superior to standard-of-care in controlling active lupus nephritis in the phase 2 AURA-LV and the phase 3 AURORA-1 trials and was approved for the treatment of active lupus nephritis. However, how to implement VOC into the current and changing treatment landscape of lupus nephritis is still debated. Here, we review the unique chemistry, pharmacology, and toxicity profile of VOC, summarize the efficacy and safety data from the AURA-LV and AURORA-1 trials, and discuss the following four possible options to implement VOC into the management of lupus nephritis, namely regarding B cell-targeting therapy with belimumab (BEL). These include: 1. patient stratification to either VOC or BEL, 2. VOC/BEL combination therapy, 3. VOC-BEL sequential therapy, or 4. alternative options for the rapid antiproteinuric effect of VOC.
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Affiliation(s)
- Ajinath Kale
- Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani 333031, Rajasthan, India; (A.K.); (V.S.); (A.B.G.)
| | - Vishwadeep Shelke
- Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani 333031, Rajasthan, India; (A.K.); (V.S.); (A.B.G.)
| | - Yutian Lei
- Division of Diabetology, Department of Internal Medicine IV, Hospital of the Ludwig Maximilians University Munich, 333031 Munich, Germany;
| | - Anil Bhanudas Gaikwad
- Department of Pharmacy, Birla Institute of Technology and Science Pilani, Pilani Campus, Pilani 333031, Rajasthan, India; (A.K.); (V.S.); (A.B.G.)
| | - Hans-Joachim Anders
- Division of Nephrology, Department of Internal Medicine IV, Hospital of the Ludwig Maximilians University Munich, 80336 Munich, Germany
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Forced degradation of tacrolimus and the development of a UHPLC method for impurities determination. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2019; 69:363-380. [PMID: 31259735 DOI: 10.2478/acph-2019-0025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/29/2018] [Indexed: 01/19/2023]
Abstract
An ultra-high performance liquid chromatography method for simultaneous determination of tacrolimus impurities in pharmaceutical dosage forms has been developed. Appropriate chromatographic separation was achieved on a BEH C18 column using gradient elution with a total run time of 14 min. The method was applied to analyses of commercial samples and was validated in terms of linearity, precision, accuracy, sensitivity and specificity. It was found to be linear, precise and accurate in the range of 0.05 to 0.6 % of the impurities level in pharmaceutical dosage forms. Stability indicating power of the method was demonstrated by the results of forced degradation studies. The forced degradation study in solution revealed tacrolimus instability under stress alkaline, thermal, light and photolytic conditions and in the presence of a radical initiator or metal ions. The drug was stable at pH 3-5. Solid-state degradation studies conducted on amorphous tacrolimus demonstrated its sensitivity to light, elevated temperature, humidity and oxidation.
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Rozman Peterka T, Grahek R, Hren J, Bastarda A, Bergles J, Urleb U. Solid state compatibility study and characterization of a novel degradation product of tacrolimus in formulation. J Pharm Biomed Anal 2015; 110:67-75. [PMID: 25804434 DOI: 10.1016/j.jpba.2015.02.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Revised: 02/21/2015] [Accepted: 02/23/2015] [Indexed: 11/16/2022]
Abstract
Tacrolimus is macrolide drug that is widely used as a potent immunosuppressant. In the present work compatibility testing was conducted on physical mixtures of tacrolimus with excipients and on compatibility mixtures prepared by the simulation of manufacturing process used for the final drug product preparation. Increase in one major degradation product was detected in the presence of magnesium stearate based upon UHPLC analysis. The degradation product was isolated by preparative HPLC and its structure was elucidated by NMR and MS studies. Mechanism of the formation of this degradation product is proposed based on complementary degradation studies in a solution and structural elucidation data. The structure was proven to be alpha-hydroxy acid which is formed from the parent tacrolimus molecule through a benzilic acid type rearrangement reaction in the presence of divalent metallic cations. Degradation is facilitated at higher pH values.
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Affiliation(s)
| | - Rok Grahek
- Lek Pharmaceuticals d.d., Verovškova 57, SI-1526 Ljubljana, Slovenia
| | - Jure Hren
- Lek Pharmaceuticals d.d., Verovškova 57, SI-1526 Ljubljana, Slovenia
| | - Andrej Bastarda
- Lek Pharmaceuticals d.d., Verovškova 57, SI-1526 Ljubljana, Slovenia
| | - Jure Bergles
- Lek Pharmaceuticals d.d., Verovškova 57, SI-1526 Ljubljana, Slovenia
| | - Uroš Urleb
- Lek Pharmaceuticals d.d., Verovškova 57, SI-1526 Ljubljana, Slovenia
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Ban YH, Shinde PB, Hwang JY, Song MC, Kim DH, Lim SK, Sohng JK, Yoon YJ. Characterization of FK506 biosynthetic intermediates involved in post-PKS elaboration. JOURNAL OF NATURAL PRODUCTS 2013; 76:1091-1098. [PMID: 23706030 DOI: 10.1021/np4001224] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The post-PKS modification steps of FK506 biosynthesis include C9-oxidation and 31-O-methylation, but the sequence of these reactions and the exact route have remained unclear. This study details the post-PKS modification pathways in FK506 biosynthesis through the identification of all intermediates and in vitro enzymatic reactions of the cytochrome P450 hydroxylase FkbD and the methyltransferase FkbM. These results complete our understanding of post-PKS modification steps to FK506 showing the substrate flexibility of two enzymes involved and the existence of two parallel biosynthetic routes to FK506.
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Affiliation(s)
- Yeon Hee Ban
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Republic of Korea
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Some transformations of tacrolimus, an immunosuppressive drug. Eur J Pharm Sci 2012; 48:514-22. [PMID: 23238171 DOI: 10.1016/j.ejps.2012.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 11/15/2012] [Accepted: 12/02/2012] [Indexed: 11/20/2022]
Abstract
Transformations of the macrocyclic lactone tacrolimus (1), an important immunosuppressive drug produced by Streptomyces species, are described. These transformation products are primarily of interest as reference substances for drug impurity analyses. Upon action of acid (p-toluenesulfonic acid in toluene), tacrolimus is dehydrated by loss of water from the β-hydroxyketone moiety with partial inversion of configuration at C-8, resulting in formation of 5-deoxy-Δ(5,6)-tacrolimus and 5-deoxy-Δ(5,6)-8-epitacrolimus. The structure of the latter was determined by single-crystal X-ray crystallography. The same products are formed upon action of free radicals (iodine in boiling toluene), along with formation of 8-epitacrolimus. The latter is converted by p-toluenesulfonic acid to 5-deoxy-Δ(5,6)-8-epitacrolimus. Treatment of tacrolimus with weak base (1,5-diazabicyclo[4.3.0]nonene) gives, in addition to 8-epitacrolimus, the open-chain acid corresponding to 5-deoxy-Δ(5,6)-tacrolimus, a rare non-cyclic derivative of tacrolimus. Strong base (t-butoxide) causes pronounced degradation of the molecule. Thermolysis of tacrolimus leads to ring expansion by an apparent [3,3]-sigmatropic rearrangement of the allylic ester moiety with subsequent loss of water from the β-hydroxyketone moiety. ¹H and ¹³C NMR spectra of the obtained compounds, complicated by the presence of amide bond rotamers and ketal moiety tautomers, were assigned by extensive use of 2D NMR techniques.
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