Patent Application
20210023010
Therapies to prevent Alzheimer' s Disease (AD) progression remain a high-unmet medical need. US Food and Drug Administration (FDA) approved acetylcholinesterase (AChE) inhibitor drugs, such as donepezil, rivastigamine and galantamine are indicated for symptomatic relief in persons with mild to moderate AD (Cummings J L, “Alzheimer' s disease,” N Engl J Med (2004) 351, 56-67; Knowles J, “Donepezil in Alzheimer's disease: an evidence-based review of its impact on clinical and economic outcomes,” Core Evidence (2006) 1, 195-219). These drugs increase levels of available acetylcholine during synaptic transmission and thus compensate for the diminished function of cholinergic neurons. However, none of the drugs approved for AD are disease-modifying treatments that affect the underlying pathophysiology of the disease, so the duration of their benefit is short-term (Knowles, 2006). The development of successful disease-modifying treatments, in contrast, would have a long-term beneficial outcome on the course of AD progression.
The treatment of AD will require addressing the multiple triggers of pathogenesis. There are two primary neuropathologies in the brains of AD patients: i) extracellular protein plaques principally composed of AP peptides, also known as amyloid plaques; and ii) intracellular tangles of fibrils composed of tau protein found inside of neurons, also known as tau tangles. The advent and spread of neurotoxic oligomeric aggregates of AP is widely regarded as the key trigger leading to neuronal damage, which then leads to the accumulation of intracellular tau tangles, and finally to neuronal cell death in AD pathogenesis.
Beta-amyloid peptides (37 to 43 amino acids in length) are formed by sequential cleavage of the native amyloid precursor protein (APP) (Karran et al., “The amyloid cascade hypothesis for Alzheimer' s disease: an appraisal for the development of therapeutics,” Nature Reviews (2011) 10, 698-712). Aberrant Aβ peptide isoforms that are 40 or 42 amino acids in length (Aβ 40 and 42) misfold into aggregates of oligomers that grow into fibrils that accumulate in the brain as amyloid plaques. More importantly for AD pathogenesis, the alternate fate of Aβ oligomers is to become trapped in neuronal synapses where they hamper synaptic transmission, which eventually results in neuronal degeneration and death (Haass et al., “Soluble protein oligomers in neurodegeneration: lessons from the Alzheimer's amyloid β-peptide,” Nature Reviews Mol. Cell Biol. (2007) 8:101-112; Hashimoto et al, “Apolipoprotein E, especially apolipoprotein E4, increases the oligomerization of amyloid beta Peptide,” J. Neurosci. (2012) 32, 15181-15192).
The cascade of Aβ oligomer-mediated neuronal intoxication is exacerbated by another AD trigger: chronic local inflammatory responses in the brain (Krstic et al., “Deciphering the mechanism underlying late-onset Alzheimer disease,” Nature Reviews Neurology (2013), January, 9 (1): 25-34). Alzheimer's disease has a chronic neuro-inflammatory component that is characterized by the presence of abundant microglial cells associated with amyloid plaque. (Heneka et al., “Acute treatment with the PPARγ agonist pioglitazone and ibuprofen reduces glial inflammation and Abeta1-42 levels in APPV717I transgenic mice,” Brain (2005) 128, 1442-1453; Imbimbo et al., “Are NSAIDs useful to treat Alzheimer's disease or mild cognitive impairment,” Front. Aging Neurosci (2010) 2 (article 19), 1-14). These cyclooxygenase (COX1/COX2)-expressing microglia, which phagocytose amyloid oligomers, become activated to secrete pro-inflammatory cytokines. (Hoozemans et al., “Soothing the inflamed brain: effect of non-steroidal anti-inflammatory drugs on Alzheimer's disease pathology,” CNS & Neurological Disorders—Drug Targets (2011) 10, 57-67; Griffin T S., “What causes Alzheimer's?” The Scientist (2011) 25, 36-40; Krstic 2013). This neuro-inflammatory response, besides promoting local vascular leakage through the blood brain barrier (BBB). Zlokovic (Zlokovic B., “Neurovascular pathways to neurodegeneration in Alzheimer' s disease and other disorders,” Nature Reviews Neurosci. (2011) 12, 723-738) has been implicated in driving further production of aberrant Aβ peptides 40 and 42 via modulation of gamma-secretase activity (Yan et al., “Anti-inflammatory drug therapy alters β-amyloid processing and deposition in an animal model of Alzheimer's disease,” J. Neurosci. (2003) 23, 7504-7509; Karran 2011) and to be detrimental to hippocampal neurogenesis in the adult brain (Gaparini et al., “Non-steroidal anti-inflammatory drugs (NSAIDs) in Alzheimer' s disease: old and new mechanisms of action,” J. Neurochem (2004) 91, 521-536). Thus, neuro-inflammation, in combination with amyloid oligomer-mediated neuronal intoxication, creates a cycle that results in progressive neural dysfunction and neuronal cell death spreading throughout the brain in subjects with AD.
Compelling evidence from multiple epidemiology studies revealed that long-term dosing with non-steroidal anti-inflammatory drugs (NSAIDs) dramatically reduced AD risk in the elderly, including delayed disease onset, reduced symptomatic severity and slowed cognitive decline. (Veld et al., “Nonsteroidal anti-inflammatory drugs and the risk of Alzheimer's disease,” N. Engl. J. Med (2001) 345, 1515-1521; Etminan et al., “Effect of non-steroidal anti-inflammatory drugs on risk of Alzheimer' s disease: systematic review and meta-analysis of observational studies,” Brit. Med. Journal (2003) 327, 1-5; Imbimbo, 2010). Three mechanisms have been proposed for how NSAIDs inhibit the processes that contribute to AD progression: i) by inhibiting COX activity to reduce or prevent microglial activation and cytokine production in the brain (Mackenzie, et al., “Nonsteroidal anti-inflammatory drug use and Alzheimer-type pathology in aging,” Neurology (1998) 50, 986-990; Alafuzoff et al., “Lower counts of astroglia and activated microglia in patients with Alzheimer's disease with regular use of non-steroidal anti-inflammatory drugs,” J. Alz. Dis. (2000) 2, 37-46; Yan, 2003; Gasparini, 2004; Imbimbo, 2010); ii) by reducing amyloid deposition (Weggen et al., “A subset of NSAIDs lower amyloidogenic Abeta42 independently of cyclooxygenase activity,” Nature (2001) 414, 212-216; Yan, 2003; Imbimbo, 2010); or iii) by blocking COX-mediated prostaglandin E2 responses in synapses (Kotilinek et al., “Cyclooxygenase-2 inhibition improves amyloid-β-mediated suppression of memory and synaptic plasticity,” Brain (2008) 131, 651-664.
Therefore, NSAIDs are predicted to dampen the neuro-inflammatory response and impact AD progression via several mechanisms. When administered together with drugs that inhibit Aβ oligomerization, the combination treatment paradigm is proposed to attenuate the multiple triggers leading to neurodegeneration and neuronal death. The decline in cognitive performance may be reversed, due to neuronal plasticity and neurogenesis in the hippocampus (Kohman et al., “Neurogenesis, inflammation and behavior,” Brain, Behavior, and Immunity (2013) 27, 22-32), if AD progression is arrested at a very early stage.
The invention encompasses a composition comprising cromolyn sodium and ibuprofen, wherein the cromolyn sodium is micronized and the cromolyn sodium and ibuprofen are present in a weight ratio of 1:1-2. In one embodiment, the ibuprofen is passed through a sieve, such as a 300 μm sieve.
The invention also encompasses methods of making a composition of cromolyn sodium and ibuprofen comprising micronizing cromolyn sodium; separately sieving cromolyn sodium and ibuprofen; blending sieved cromolyn sodium and ibuprofen; and blend co-milling the blended cromolyn sodium and ibuprofen. In one embodiment, the sieve is about 250 μm to 500 μm sieve. In another embodiment, the micronizing step is performed at a feed gas pressure of about 45 psi and a grinding pressure of about 45 psi.
The subject matter regarded as the invention is particularly pointed out and distinctly claimed in the concluding portion of the specification. The invention, however, both as to organization and method of operation, together with objects, features, and advantages thereof, may best be understood by reference to the following detailed description when read with the accompanying drawings in which:
The invention encompasses compositions for a dosage form via inhalation. Basically, the invention combines at least two pharmaceutically active ingredients, both in powdered form, for administration via inhalation. The compositions can be used in formulations to enable easy dosing for patients, in contrast to dosing each API separately such as where one is inhaled and the other taken orally. An advantage of the simultaneous dosing of two APIs via inhalation is greater patient compliance with drug administration.
In particular, the invention is applicable for patients with diseases that impair mental performance, such as Alzheimer's disease, where the patient may have difficulty remembering to administer their medications. The invention is also applicable when the disease impacts physical activity, such as difficulty grasping pills or even the act of swallowing. The inability to correctly administer a dosage form can diminish the effect of the medication. These difficulties can exacerbate the disease because drug(s) administration is difficult, inconsistent, and/or under-dosed. To address these problems and increase patient compliance and ease administration, the present invention provides a combined dosage form suitable for administration via inhalation to treat Alzheimer's disease and other neurological diseases. Because of its versatility, the composition and formulation may also be used to treat other diseases including, but not limited to, stroke, amyotrophic lateral sclerosis (ALS), Parkinson's disease, and asthma.
One application of the present invention is a composition of cromolyn sodium and ibuprofen each in powdered form suitable for inhalation as a combination dosage form. In this case, each ingredient is in powdered form to facilitate administration via inhalation and to enable easy and accurate dosing. The invention is based in part upon the discovery that when cromolyn sodium and ibuprofen are both in powdered form, ibuprofen improves the aerodynamic flow of cromolyn. One advantage of this improvement allows for a higher concentration of cromolyn to reach deeper within the patient's lungs thereby achieving a therapeutic effect with less drug. Another advantage is that a perfect dosage via inhalation may not be necessary to achieve adequate therapeutic effect. In patients with impaired physical abilities (which may be due to a disease such as Alzheimer's disease) a perfect inhalation (a perfect “puff”) may not always be possible; with the present invention, even impaired inhalation (an imperfect “puff”) will deliver sufficient drug dosage to treat the desired disease. The advantages of the present composition can be applied to other diseases with similar problems and expand the list of indications where the improved dosage form may be applicable.
In one application, the co-administration of the composition of cromolyn sodium and ibuprofen can be used for the treatment of certain neurological diseases. The neurological diseases include, but are not limited to, AD, ALS, Parkinson's disease, and the effects from stroke.
The invention relied on a methods to analytically discriminate between two APIs in a single sample to evaluate the characteristics of ibuprofen to understand the influences ibuprofen can have on the formulation. The analytical methods to discriminate between the two APIs in a sample also allowed investigation of the effect of micronization of ibuprofen for inhalation. These methods allowed determination of the feasibility of cromolyn sodium and ibuprofen as a combined single dosed product. Further methods allowed determination of the compatibility of the combined APIs in the combination dosage form. We discuss each in turn.
To determine the appropriate combination dosage, an analytical method was developed to distinguish between cromolyn sodium and ibuprofen within the same sample. The method included an assay to identify and quantify each API and measure the performance of each compound by testing the emitted dose and aerodynamic particle size.
The method comprises submitting a sample having cromolyn and ibuprofen through two chromatographic columns in sequence having a first and a second mobile phase, wherein the first mobile phase has sodium acetate with a buffer pH of about 5.5 and methanol, and the second mobile phase perchloric acid and acetonitrile, and detecting the cromolyn and ibuprofen. The sequence of columns and mobile phases are interchangeable. For instance, regarding mobile phases the terms first and second are used to demonstrate different mobile phases, not their sequence. The chromatographic columns include, but are not limited to, Agilent Poroshell 120 SB-C18 100×3 mm, 2.7μ. The mobile phases are present in an elution gradient of about 70:30 to 3:97 by volume, preferably from about 75:25 to 5:95, and more preferably from about 80:20 to 10:90 by volume. Any know method of detection may be used in the method including, but not limited to, UV, preferably the detection is carried out by UV.
In one embodiment of the analytical method, the HPLC analytical method used two columns: (1) Phenomenex Hyperclone BDS C18 130A 250×4.6 mm, 5μ and (2) Zorbax SB C18 150×4.6 mm, 3.5μ. The mobile phases included a sodium acetate or potassium phosphate and methanol mixture for cromolyn sodium and a perchloric acid: acetonitrile mixture for ibuprofen. For instance, in one example 23nM sodium acetate buffer (pH 5.5): methanol was used for cromolyn sodium and 0.2% perchloric acid: acetonitrile for ibuprofen. The mobile phase for cromolyn can have a pH of about 4 to about 7.5, preferably from about 4.5 to about 7, and more preferably from about 5.5 to 6.8.
The analytical method used a gradient system of 85:15 to 10:90 (v/v) to assess the elution of both APIs. The wavelength of detection (both used for the detection of each API) was as follows: cromolyn sodium—254 nm and ibuprofen—214 nm.
The injection volume was changed from 100 μL to 10 μL; the run time was changed from 20 to 5 minutes; and the gradient was changed from 85:15-10:90 (v/v) to 80:20-10:90.
The analytical method is exemplified in Example 1 and Example 2. Cromolyn sodium and ibuprofen separated well, as illustrated in
The ibuprofen used in the composition for the formulation may be in coarse or micronized form or any other form, as long as that form is suitable for inhalation. Another prerequisite is that the ibuprofen combines well with cromolyn sodium in order to enhance the delivery of cromolyn sodium via inhalation. In particular, the combination should deliver cromolyn sodium to the deep parts of the lung, e.g., DPI 4moc (stage 4 to MOC, representing the area of the lung consisting of the secondary bronchi to the alveoli).
Ibuprofen was characterized to determine the parameters necessary to administer a therapeutically effective amount using an inhalation delivery system. The methodology included particle size determination (PSD); powdered x-ray crystallization diffraction (PXRD); and gravimetric vapor sorption (GVS). The methods determined that coarse ibuprofen was crystalline and non-hygroscopic. The results are summarized in Example 3. Ibuprofen adsorption-desorption isotherm showed <0.2% weight gain upon exposure to moisture suggesting that ibuprofen is non-hydroscopic.
The invention also encompasses a composition having micronized ibuprofen, where the ibuprofen has a size parameter of about ≤10 μm; however, particle size may also include ≤5 μm. The micronization may be performed on coarse ibuprofen using an air-jet mill or similar apparatus, such as a grinder or a mill. Other methods to micronize the ibuprofen include milling, bashing, cutting, or crushing. For example, two batches were micronized with an air-jet mill using a feed gas pressure of about 45 psi and a grinding pressure of about 45 psi. One batch was micronized a second time under the same conditions. Optionally, the ibuprofen may be micronized more than once. After micronization, particle size distribution was performed on the micronized ibuprofen by wet dispersion. The micronized ibuprofen was highly soluble in organic solvents; not dispersible in water (formed agglomerates); and soluble in different surfactants containing aqueous media even at low concentrations of the surfactant. Example 3 illustrates the process and results of ibuprofen micronization.
Micronized ibuprofen adsorbed higher moisture of ˜3% by weight on the surface compared to <0.2% adsorption by coarse ibuprofen. The adsorption increase was due to the increased surface area upon micronization and generation of surface amorphous material. See
Cromolyn used in the composition formulation may primarily be manufactured for inhalation. Generally, the cromolyn is micronized. The cromolyn micronization produces an ultra-fine powder (d<10 μm) of small particle size. Micronized Cromolyn typically has a specification of d(90%)<5 μm.
The invention also encompasses a composition of cromolyn sodium and ibuprofen for delivery via inhalation. This composition comprises micronized cromolyn sodium and ibuprofen, wherein the ibuprofen may or may not be micronized, i.e., the ibuprofen may be coarse or micronized. The composition improves the delivery of cromolyn, from cromolyn only compositions or where cromolyn is delivered in sequence (not simultaneously) with ibuprofen. For instance, the inhaled formulation of cromolyn only can deliver a therapeutically effective amount of cromolyn to the deep lung of about 23% to about 29% of the dosed amount. In contrast, it was found that the composition of the present invention delivered a therapeutically effective amount of cromolyn in a range of about 34% to about 53% and preferably 35% to about 44% of the dosed amount
One composition of the invention comprises 17.1 mg of cromolyn and 10 mg of ibuprofen. This is in alignment with current study drug concentrations being utilized in clinical studies. As used herein, unless otherwise indicated, the term “cromolyn” includes cromolyn, cromolyn sodium, and other forms of pharmaceutically acceptable salts of cromolyn.
Formulation 2A—Cromolyn with Coarse Ibuprofen
Formulation 2B—Cromolyn with Micronized Ibuprofen
In one formulation, both cromolyn sodium and ibuprofen are passed through a sieve. The sieve size may be from about 600 μm to about 200 μm, preferably from about 500 μm to about 250 μm, and more preferably from about 300 μm to 400 μm. Typically, the weight ratio of cromolyn sodium to ibuprofen is about 1:1 to about 1:2.5, preferably, from about 1:1.1 to about 1:2, and more preferably from about 1.1:1.7. Optionally, the formulation includes pharmaceutically acceptable excipients, such as magnesium stearate and lactose monohydrate.
The stability of the composition of cromolyn sodium and ibuprofen is exemplified in Example 5. The formulations using either micronized ibuprofen or coarse ibuprofen provided sufficient performance of an inhaled substance when compared to the specifications of the cromolyn only product. The formulation enhanced the aerodynamic performance of cromolyn sodium during inhalation by comparison to a formulation of cromolyn sodium, lactose, and magnesium stearate. The combination product batches had a comparable emitted dose as the six clinical batches produced of the cromolyn only product. The six batch formulations manufactured with cromolyn and excipients only had a mean of 34.97% of the product reaching the deep lung area based on the NGI test results summation of Stage 3-MOC whereas with combination of cromolyn using either course or micronized ibuprofen had a mean result of 46% of the inhaled cromolyn reaching the deep lung area. Therefore, the compositions of the invention include cromolyn and ibuprofen compositions having a mean result of 36% to 56%, preferably from about 41% to about 51%, and more preferably from about 43% to about 48% of the inhaled cromolyn reaching the deep lung area. As used herein, unless otherwise defined, the term “lung area” refers to Stage 3—MOC. The stability study performed under accelerated conditions showed no effect of the APIs towards each other.
1All batches used micronized Cromolyn sodium API
2MgSt—Magnesium Stearate
3Cromolyn with Lactose monohydrate and Magnesium stearate
1All batches used micronized Cromolyn sodium API
2MgSt—Magnesium Stearate
3Cromolyn with Lactose monohydrate and Magnesium stearate
4With addition of Lactose Monohydrate this will improve the performance
Pharmaceutically acceptable excipients for dry powdered inhalers include, but are not limited to, lactose monohydrate and magnesium stearate.
The invention encompasses methods of making the described compositions comprising micronizing ibuprofen; separately sieving cromolyn sodium and ibuprofen; blending sieved cromolyn sodium and sieved ibuprofen; and blend co-milling the blended cromolyn sodium and ibuprofen to obtain the composition.
The ibuprofen micronization step can be carried out using standard equipment commonly used in the pharmaceutical arts. The feed pressure and grinding pressure are about 30 psi to about 60 psi, preferably about 35 psi to about 50 psi, and more preferably about 45 psi. The blending step comprises blending both ingredients for a time of about 5 minutes to about 20 minutes and preferably about 10 minutes to about 15 minutes, and more preferably for about 10 minutes. The blending rate is about 35 rpm to about 60 rpm, preferably about 40 rpm to about 50 rpm, and more preferably about 49 rpm. The blend co-milling step may be blended in a single pass. The feed pressure and grinding pressure for the co-milling step are about 30 psi to about 60 psi, preferably about 35 psi to about 50 psi, and more preferably about 45 psi. Examples 4 and 5 demonstrate the method of making the formulation.
While certain features of the invention were illustrated and described herein, many modifications, substitutions, changes, and equivalents will now occur to those of ordinary skill in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
Two columns were used in the method: (1) Phenomenex Hyperclone BDS C18 130A 250×4.6 mm, 5μand (2) Zorbax SB C18 150×4.6 mm, 3.5μ. The mobile phases were as follows: cromolyn sodium: 23 nM sodium acetate buffer pH 5.5: methanol and ibuprofen: 0.2% perchloric acid:acetonitrile. The mobile phases used a gradient system from 85:15 to 10:90 to assess the elution of both APIs. The wavelength used to detect each API was 254 nm for cromolyn sodium and 214 nm for ibuprofen. Table 1 summarizes the method parameters and
The method described in Example 1 was repeated using the method parameters described in Table 4. The results are illustrated in
Using the method described in Table 4, the analysis was repeated using a 50 μg/mL standard. Table 5 summarizes the results.
Based on the data of Table 3, the linearity was calculated for cromolyn sodium and ibuprofen over the range of 0.05-50 g/mL.
Coarse ibuprofen was characterized using PSD, PXRD, and GVS. The tests demonstrated that coarse ibuprofen was crystalline and non-hydroscopic. Table 6 illustrates the effect of the dispersant.
The average particle size determinations are illustrated in
Subsequently, two batches of coarse ibuprofen were micronized using an air-jet mill at feed gas pressure of 45 psi and a grinding pressure of 45 psi. Batch 1 was micronized by a single pass and Batch 2 was passed twice.
Following micronization, Particle Size Distribution (PSD) analysis was performed by wet dispersion. It was observed that micronized ibuprofen did not disperse well in either aqueous or organic dispersing media as micronized ibuprofen, it was highly soluble in organic solvents, was not dispersible in water and formed agglomerates, and was soluble in different surfactant containing aqueous media even at low surfactant concentrations, as observed with reducing % obscuration in the PSD analyzer instrument. Due to the limitations of PSD analysis by wet dispersion, SEM imagery was performed to infer PSD.
Micronize ibuprofen adsorbed greater moisture of ˜3% on the surface compared to <0.2% adsorption on coarse ibuprofen. This increase in adsorption was due to increase surface area upon micronization and generation of surface amorphous material.
A series of blend combinations of cromolyn sodium and coarse or micronized ibuprofen were evaluated for blend uniformity, emitted dose, and aerodynamic particulate (NGI). Ten samples were taken from geometric locations within the blend. Batch 3 consisted of cromolyn sodium and coarse ibuprofen at a weight ratio of 1.7:1 and passed through a 300 μm sieve. The blend parameters for the turbula mixer were as follows: mixing speed: 49 rpm and mix time: 10 minutes. Table 8 illustrates the results of Batch 3 that showed uniformity for cromolyn sodium and an acceptable % RSD for ibuprofen.
Subsequently, the Batch 3 blend was then filled into HPMC size 3 clear capsules to a fill weight of 30 mg per capsule. The capsules were allowed to relax overnight to dissipate any static charge and then emitted dose testing was performed for five capsules. The test parameters were as follows: device: low resistance and the flowrate: 80 L/min for 3 seconds. Table 9 has the results of the emitted dose test for Batch 3.
Batch 4 includes Batch 3 and magnesium stearate (2% w/w). Table 10 contains the results of blend uniformity testing for Batch 4. The test parameters as the same as those for Batch 3.
Subsequently, the Batch 4 blend was then filled into HPMC size 3 clear capsules to a fill weight of 30 mg per capsule. The capsules were allowed to relax overnight to dissipate any static charge and then emitted dose testing was performed for five capsules. The test parameters were as follows: device: low resistance and the flowrate: 80 L/min for 3 seconds. Table 11 has the results of the emitted dose test for Batch 4.
The concentration of coarse ibuprofen was increased to determine the effect on emitted dose performance. Three batches were made adding magnesium stearate: Batch 5 (weight ratio cromolyn sodium: ibuprofen 1.7:1.1); Batch 6 (weight ratio cromolyn sodium: ibuprofen 1.7:1.5); and Batch 7 (weight ratio cromolyn sodium: ibuprofen 1.7:2.0). Table 12 illustrates the blend uniformity for batches 4, 5, 6, and 7. The blends were homogeneous.
Using the same parameters as before, the emitted dose testing results are summarized in Table 13.
The results show that by increasing the fill weight of Ibuprofen there was an increase in the emitted dose. Cromolyn sodium maintained consistent performance for the emitted dose regardless of the Ibuprofen concentration.
Magnesium stearate was removed from the formulation of Batch 5 to obtain Batch 8. Table 14 illustrates the blend uniformity testing for Batch 8, which was a homogeneous powder blend. Table 15 contains the data for emitted dose testing of Batch 5 and Batch 8.
Two formulations were made using a blend of micronized ibuprofen and magnesium stearate and another without magnesium stearate. Batch 9 with 2% by weight magnesium stearate and Batch 10 without magnesium stearate. The blending process comprises the steps (1) micronizing ibuprofen at a feed pressure of 45psi and a grinding pressure of 45 psi for one pass; (2) separately passing the micronized ibuprofen and cromolyn sodium through a 300 μm sieve; (3) blending the two materials in a Turbula mixer for 10 minutes at 49 rpm; and (4) blend co-milling by milling the blend (single pass) with a feed pressure of 45 psi and grinding pressure of 45 psi. Table 14 summarizes the assay results for the two batches without magnesium stearate.
Table 15 summarizes the assay results for the two batches with magnesium stearate.
The results show no difference between formulation with and without magnesium stearate in terms of emitted dose. Both batches were tested for NGI and stability.
Aerodynamic particle size distribution determined by NGI. Batch 9 was co-milled and magnesium stearate was added. Batch 10 was co-milled and had no magnesium stearate. Batch 5 was blended with coarse ibuprofen and magnesium stearate was added. Batch 8 was blended with coarse ibuprofen and had no magnesium stearate. Table 18 summarizes the conditions used in the NGI method.
Tables 19-22 summarize the data for each batch. Table 23 contains the data comparing batches 5, 8, 9, and 10.
In a composition for systemic delivery rather than local delivery, deposition in Stages 3—MOC is of importance. The data demonstrated that blended formulations are superior in terms of Stages 3—MOC deposition compared to cromolyn only formulation. Batch 5 was comparable to the current formulation used in the current clinic while Batch 8 was better than the current product in terms of Stages 3-MOC. The blended formulation has shown an increase in cromolyn reaching the deep lung thereby increasing the amount of bioavailability of cromolyn into the plasma, the ibuprofen emitted dose and NGI test results both in course and micronized form show that it can reach the lung as well.
A stability study was performed to determine the compatibility of the combined APIs under accelerated degradation conditions. Separate control samples of micronized cromolyn sodium (Sample A) and micronized ibuprofen (Sample B) were included in the study to be used as a comparator to the blend of Cromolyn/Ibuprofen (Sample C). The study was performed at 40° C. and 75% relative humidity. Measurements were taken at time 0, 1 month, 2 months, and 3 months.
Tables 24A, 24B, and 24C summarize the study results for Sample A, Sample B, and Sample C, respectively.
The combination of cromolyn sodium and ibuprofen had no effect on the stability of the material, and therefore the APIs were compatible in the combine formulation.
The study demonstrated that the method developed for the assay of the combined cromolyn sodium and ibuprofen composition distinguished between the two APIs without interference. The formulations using either micronized ibuprofen or coarse ibuprofen provided sufficient performance of an inhaled substance to achieve a therapeutic effect. The combined formulation enhanced the performance of cromolyn sodium by comparison to the original formulation. In other words, cromolyn concentration in the deeper regions of the lung were higher than seen with a formulation of cromolyn only with lactose.
This application claims priority to and the benefit of U.S. Provisional Patent Application Ser. No. 62/534,848, filed Jul. 20, 2017.
| Number | Date | Country | |
|---|---|---|---|
| 62534848 | Jul 2017 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15838753 | Dec 2017 | US |
| Child | 16789775 | US |
