WO2017167317A1 - Composición farmacéutica que comprende los antígenos de la superficie y de la nucleocápsida del virus de la hepatitis b - Google Patents
Composición farmacéutica que comprende los antígenos de la superficie y de la nucleocápsida del virus de la hepatitis b Download PDFInfo
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Definitions
- the present invention relates to the field of medicine, in particular with the branch of vaccinology, specifically with the development of more effective vaccine compositions.
- These compositions comprise hepatitis B virus (HBV) antigens that have modifications in their chemical composition, which unexpectedly increased their immunogenicity.
- HBV antigens modified in their chemical composition were the surface antigen (HBsAg) and the core antigen (HBcAg).
- HBC chronic hepatitis B
- interferon (IFN) alpha IFN- ⁇
- PegIFN pegylated variant
- nucleotide and nucleoside analogues such as Tenofovir, Entecavir, Lamivudine, Adefovir-dipivoxil and Telbivudine
- AD adverse events
- vaccine formulations as an immunotherapeutic strategy, in the treatment of HBC is an interesting approach. Viral persistence has been associated with a defect in the development of anti-HBV cellular immunity. Since the beginning of the 1980s, vaccine strategies have been developed aimed at expanding and enhancing the weak T-cell response of HBC patients. These immunotherapeutic strategies initially used commercial anti-HBV vaccines, with the aim of inducing specific CD4 + and CD8 + responses against HBV, and pro-inflammatory cytokines capable of controlling viral replication. Thus, almost all commercial preventive vaccines were tested alone, or in conjunction with conventional antiviral therapies. In previous studies of therapeutic vaccination, vaccines were administered with or without other antiviral treatments. In addition, immunotherapy with commercial vaccines also proposed schemes with a greater number of inoculations and alternative parenteral routes were explored. The main studies are summarized below.
- Genhevac B ® A pilot vaccination study in patients with HBC using Genhevac B ® (Aventis Pasteur, France, produced in mammalian cells -CHO) showed a reduction in HBV replication, of about 50% of chronic carriers [Pol S, e ⁇ to the. CR Acad Sci III (1993), 316: 688-91].
- Genhevac ® vaccine was evaluated for therapeutic purposes [Yalcin K, e ⁇ al. Infection (2003), 31: 221-225; Dikici B, et al. J Gastroenterol Hepatol (2003), 18 (2): 218-22] showed only very slight benefits associated with treatment.
- the Hepagene ® vaccine (Medeva Ltd., United Kingdom, produced in CHO), includes the three variants of HBsAg (L, S and M), and its results in healthy volunteers and non-responders demonstrated high levels of immunogenicity [Page M, e ⁇ to the. Intervirology (2001), 44: 88-97; Yap I, et al. Ann Acad Med Singapore (1996), 25: 120-122; Zuckerman JN, et al. BMJ (1997), 314: 329; Jones CD, et al. Vaccine (1999), 17 (20-21): 2528-37]. Taking this into consideration, a study was carried out where its therapeutic potential was evaluated.
- the combined antiviral vaccination strategy should favor a greater reactivity of the T-cell response to HBV, but it can also be considered safer, since it must avoid great liver damage, as a consequence of the activation of the immune system.
- the activation of the specific immune response, by the vaccine, in HBC patients causes fulminant hepatitis.
- envelope proteins have characteristics that justify their inclusion in a therapeutic vaccine.
- envelope proteins contain numerous B and T cell epitopes [Penna A, et al. J Virol (1992), 66 (2): 1 193-6; Nayersina R, et al. J Immunol (1993), 150: 4659-71], and it is estimated that anti-envelope antibodies play a critical role in viral suppression, by removing free viral particles from the circulation and preventing the re-infection of susceptible cells.
- HBcAg has been suggested as the main antigenic candidate to be included in a therapeutic vaccine for HBC.
- the epitopic T-cell response is strongly favored, and is predominant during seroconversion in spontaneous or treatment-induced HBC [Ferrari C, et al. J Clin Invest (1991), 88: 214-22; Marinos G, et al. Hepatology (1995), 22: 1040-9; Tsai SL, et al. Clin Invest (1992), 89: 87-96].
- HBsAg The Center for Genetic Engineering and Biotechnology (CIGB) produces HBsAg, as a recombinant protein, obtained in Pichia pastoris yeast as a host. This antigen has been included in the Heberbiovac HB ® preventive vaccine since early 90s of the last century [Muzio V, et al. Applied Biotechnology (2001) 18; 103-104; ul-Haq N, et al. Vaccine (2003) 21: 3179-85].
- the CIGB developed a formulation where the anti-hepatitis B immune response is extended, said formulation comprising as main components HBsAg and HBcAg, the antigens are administered mucosally, to generate systemic and mucosal response [European Patent No. EP 1 136077].
- the generation of aggregate antigenic structures, which form particles is described. This document reveals that aggregation, delipitation or oxidation, as well as the selection of particles of 30-500 nm, and the formulation of these suitably adjuvant aggregates favor the immunogenicity of the resulting antigenic preparation [European Patent No. EP 1346727].
- NASVAC anti-vacuna Y, et al. Mol Immunol (2015), 63: 320-327
- NASVAC a therapeutic vaccine candidate administered by combining immunization routes.
- the clinical results of the vaccine formulation are very attractive; however, the effectiveness of the product must be increased with the use of more potent immunogens.
- Vaccine strategies that include the main HBV antigens, such as HBsAg and HBcAg, have resulted in formulations with some antiviral effectiveness. However, its improvement is required to increase the number of patients with sustained antiviral response, as well as the number of patients who achieve seroconversion of HBsAg to anti-HBsAg.
- the invention contributes to solving the aforementioned problem, by providing a pharmaceutical composition characterized in that it comprises: 1) the HBcAg antigen comprising messenger ribonucleic acid (mRNA) in a proportion greater than 45% of the total ribonucleic acid (RNA) of said antigen and 2) the HBsAg antigen of HBV.
- the pharmaceutical composition contains HBsAg comprising phosphatidylserine, in a proportion greater than 5% of the total phospholipids possessed by said antigen.
- HBsAg and HBcAg antigens modified in their chemical constitution in that particular way, favors the immunological and antiviral properties of that composition for immunotherapy.
- the aforementioned modifications do not affect the protein composition of the HBsAg and HBcAg antigens of the invention, since their primary, secondary and tertiary structure remains identical, compared to their unmodified variants.
- modifications lead to unexpected characteristics of said antigens, which result in more potent immunogens.
- the combination of said modified antigens led to a formulation with superior antiviral and therapeutic effectiveness for the treatment of HBC.
- HBcAg was obtained with an mRNA level exceeding 45%.
- this modified antigen was obtained due to the combination of changes in parameters of the fermentation process thereof.
- the use of a chemically defined medium and the low specific growth rate resulted in obtaining a variant of the HBcAg where the proportion of mRNA increased compared to the rest of the RNAs present therein.
- HBcAg containing a level of mRNA that exceeds 45%, within total RNA had a higher immunogenicity compared to HBcAg obtained without modification in its mRNA content.
- Said increase in immunogenicity comprised a significant increase in Th1 cytokines, and a superior ability to eliminate circulating HBsAg after immunizing transgenic mice and HBC patients.
- HBsAg containing phosphatidylserine was evaluated in a percentage greater than 5% of the total phospholipids that are present in this lipoprotein antigen.
- the increase in the proportion of phosphatidylserine, above 5% of the total phospholipids was demonstrated after the variation of parameters such as the increase in concentrations of calcium and magnesium in the fermentation medium, the low specific growth rate and the low pH.
- the invention is not restricted to the HBsAg obtained under those conditions.
- the increase in the proportion of phosphatidylserine above 5% was correlated with the increase in the immunogenicity of the resulting antigen, when compared with HBsAg with a lower content of said phospholipid.
- HBsAg and HBcAg antigens modified have been selected on the basis of the higher intensity of the immune and antiviral responses, as compared to formulations in which the unmodified antigens were employed.
- the formulation containing the two antigens was able to produce seroconversion of HBsAg to anti-HBsAg in a larger number of individuals, when compared with the antigens administered separately, demonstrating the importance and functionality of the modifications detected in the antigens that are part of the composition object of the present invention, as well as the superiority of the combined formulations, in comparison with the individual antigens.
- the present invention represents a novel solution to the problem prevailing in the state of the art, on the need for new formulations that allow the potentiation of the anti-HBsAg and anti-HBcAg immune response, to achieve more effective antiviral treatments for the control of chronic HBV infection.
- the matter referred to in the present invention cannot be considered as obvious, or derived from the state of the art by versed persons, since it is the result of the identification of new characteristics in the described antigens.
- modified antigens keep their protein composition intact, they are different in terms of the chemical composition of other molecules associated with them.
- modified HBcAg is considered to be that preparation of HBcAg comprising mRNA in a proportion greater than 45% of the total RNA of said antigen.
- modified HBsAg is considered to be that preparation of HBsAg comprising phosphatidylserine in a proportion greater than 5% of the total phospholipids of said antigen.
- the composition comprising the HBcAg antigen comprising mRNA in a proportion greater than 45% of the total RNA of said antigen and the HBsAg HBV antigen is characterized in that it is formulated for administration by parenteral routes and mucosal To administer the composition of the invention by the mucosal route, and in particular by the nasal route, attachments that have been developed and / or marketed for the administration of pharmaceutical formulations by that route can be employed.
- said composition is characterized in that it additionally comprises a vaccine adjuvant.
- vaccine adjuvants that may be present in the composition of the invention are, for example, those that are well known to those skilled in this branch of the art, such as aluminum salts, water-in-oil emulsions developed for its use in humans, immune system stimulators, etc.
- the invention provides the use of the HBcAg antigen comprising mRNA in a proportion greater than 45% of the total RNA of said antigen and the HBsAg antigen in the manufacture of a medicament for immunoprophylaxis or immunotherapy against HBV infection.
- the HBsAg that is part of said medicament comprises phosphatidylserine in a proportion greater than 5% of the total phospholipids of said antigen.
- said medicament is formulated for administration by the parenteral and mucosal routes.
- the medicament comprising HBcAg comprising mRNA in a proportion greater than 45% of the total RNA of said antigen and the HBsAg antigen is used in the treatment of HBC patients or patients with coinfections where one of the viruses Infectious is HBV. Additionally, when treating HBC patients with this medication, it is used in the prevention of hepatocellular cancer derived from HBV infection.
- the drug comprising HBcAg comprising mRNA in a proportion greater than 45% of the total RNA of said antigen and the HBsAg antigen is used in the treatment of HBC patients by immunotherapy, it can be performed in an active way ( by immunizing patients with said medication) or passively, by cellular stimulation. Due to its components, the pharmaceutical formulation of the invention can be used in the stimulation of autologous or heterologous cells. That way, The invention constitutes a method of cellular stimulation with said formulation, and the subsequent passive immunization of patients with HBC, based on the maximum stimulation, in vivo or in vitro, of autologous or heterologous cells, which include dendritic cells, B cells and macrophages
- the present invention discloses a method for immunoprophylaxis or immunotherapy against HBV infection that is characterized in that an effective amount of a pharmaceutical composition comprising the HBcAg antigen, which comprises mRNA, is administered to an individual in need thereof. a proportion greater than 45% of the total RNA of said antigen, and HBsAg HBV antigen.
- the HBsAg comprises phosphatidylserine in a proportion greater than 5% of the total phospholipids of said antigen.
- said pharmaceutical composition is administered parenterally and mucosally.
- the individual receiving immunotherapy is an HBC patient. In that case, the application of the method of the invention to the immunotherapy of HBC patients results in the prevention of hepatocellular cancer derived from HBV infection.
- the HBsAg that is part of the antigen mixture comprises phosphatidylserine in a proportion greater than 5% of the total phospholipids of said antigen.
- the mixture of referred antigens can be used in potentiating the immune response against HBC (in a therapeutic setting) or in preventive vaccination strategies, where the vaccine is multivalent. This is because, in addition to the increased immunogenicity of the HBsAg and HBcAg antigens modified in particular, it was possible to verify that they are capable of inducing a potentiating effect of the immunogenicity of heterologous antigens. The results of the experimental evaluations showed that these antigens present in multivalent formulations may be useful for prophylactic or therapeutic use.
- FIG. 1 Proliferative response of CD8 + CR3 (HIV-1) -specific T cells.
- Example 1 Obtaining the HBcAg protein with various proportions of the RNA variants
- HBcAg was obtained from a strain of E. coli genetically transformed with a plasmid carrying the gene that codes for said antigen [Aguilar JC, et al. Immunol Cell Biol (2004) 82: 539-46].
- mice Once different variants of HBcAg with different percentages of mRNA incorporated inside the particle were obtained (Table 1), the immunological evaluation of these preparations was carried out in Balb / c mice. For this study female mice, between 8 and 12 weeks of age, were used that received two immunizations, on days 0 and 15, by the SC route, with a dose of ⁇ g of HBcAg in phosphate buffered saline (PBS), administering a final volume of 100 ⁇ _. The detailed description of the scheme is shown in Table 2.
- PBS phosphate buffered saline
- Example 2 Obtaining HBsAg virus-like particles (PSV) with different proportions of phosphatidylserine
- HBsAg Recombinant HBsAg was obtained from a strain of P. pastoris genetically transformed with the gene encoding said antigen [European Patent No. EP 480525]. It is known that HBsAg expressed in this species of yeast, contains phosphatidylserine within its structural lipids [Lobaina Y, et al. Applied Biotechnology (2008), 25: 325-331]. However, until the present invention, the influence of the presence of this lipid on the immunogenicity of said antigen had not been studied.
- Phosphatidylserine was associated with the PSV of HBsAg, of recognized lipid nature.
- the results shown in Table 3 represent the average values of five different repetitions. Purification was similar for all HBsAg preparations produced under different experimental conditions. As can be seen in the table, there was no detection of phosphatidylserine in the samples obtained when the fermentation was carried out with a culture medium containing a Mg (2+) concentration below 1.2%. The phosphatidylserine levels found in the preparation obtained with culture medium containing 2.0% Mg (2+) were significantly higher than those found in the preparation obtained with culture medium containing 1.4% Mg (2+) ( Variant C).
- Mg ( '(%): concentration of the Mg ion (in percent) present in the saline additives of the culture medium.
- FS (%): percentage of phosphatidylserine within the total phospholipids, determined after the extraction of purified HBsAg.
- * Significant differences ⁇ p ⁇ 0.05),
- ** Very significant differences ⁇ p ⁇ 0.01).
- the HBsAg preparations represented in Table 3 were identical in their protein composition, according to the characterization made to study their primary, secondary and tertiary structure, comparable to their original variant. Importantly, the ratio of lipid concentration / protein concentration It did not change, for any of the variables under study. The same finding took place with the proportion of total phospholipids vs. total protein content. There was no other significant change during the analysis of impurities of HBsAg or other minor compounds, as a result of the analysis of its composition by mass spectrometry.
- mice expressing serum HBsAg were used.
- the first six study groups each received 5 ⁇ g of the different variants of HBsAg described in Table 3 with Freund's adjuvant.
- the seventh group was used as a control group, and received 1 X PBS.
- All treatment groups received 10 doses of immunogen, which were administered every 14 days. Blood extractions were carried out before the initial immunization and 10 days after each dose, from the third dose administered. Table 4 shows the levels of HBsAg in the serum of transgenic mice, as well as cytokine levels (IFN gamma (IFN- ⁇ ), tumor necrosis factor (TNF- ⁇ ), and IL-2 induced in supernatants of splenocyte culture, isolated after the 10 doses were administered. The evaluations were performed using the ELISA technique.
- HBsAg variants of 5% or more of phosphatidylserine induced significantly higher levels of IFN- ⁇ , TNF- ⁇ and IL-2, compared to variants with low (variant C) or undetectable levels of phosphatidylserine, which suggests a dose dependent effect. All this can be seen in Table 4.
- a - F HBsAg variants produced with increasing levels of phosphatidylserine in its composition, shown in Table 3.
- Example 1 an increase in the immunogenicity of HBcAg was evidenced in mice with the increase in the proportion of mRNA within the total encapsulated RNA. Taking these results into account, the in vivo immunological and antiviral response behavior of formulations that include both HBcAg and HBsAg were characterized, with modifications in their mRNA and phosphatidylserine content, respectively.
- a randomized, phase-blind, phase II clinical study was carried out in chronic patients with hepatitis B. Patients with a viral load above 10,000 copies / mL and positive HBeAg at the start of the study were selected. . The patients were divided into 6 groups, of 15 patients each, to whom the treatments described in Table 5 were administered. A total of 10 doses were administered, divided into two cycles of 5 doses each, separated by a month of break. The first 5 doses were administered only by the IN route, and the remaining 5 by simultaneous co-administration IN / SC. In both cycles of administrations the doses were set at intervals of 14 days.
- mHBcAg HBcAg containing mRNA in a proportion of 50% of the total RNA of said antigen
- mHBsAg HBsAg containing 7% phosphatidylserine within the lipid components of PSV.
- significantly higher levels of seroconversion to HBeAg and HBsAg were found in the group of patients treated with the formulation containing both modified antigens (i.e. the formulation containing HBsAg with phosphatidylserine levels greater than 5%, and HBcAg with mRNA by above 45%), when compared with the groups of patients treated with formulations without these characteristics (see Table 6). This demonstrates the relevance of such modifications in increasing the quality of the antiviral response that was generated in patients.
- HBV per mL more than 1 year after the end of treatment.
- formulations containing the modified HBcAg and HBsAg variants developed a more potent Th1 immunogenicity in transgenic mice for HBV and in patients, compared to the response obtained with formulations containing unmodified antigens, or formulations that They contained only one of these modified antigens.
- Example 5 Adjuvant effect of HBcAg and HBsAg antigens that have modifications in their mRNA and phosphatidylserine content, respectively, in multivalent formulations
- the adjuvant capacity that is, the increase in the immune response to co-administered antigens, of the mixture of recombinant HBcAg and HBcAg proteins that have modifications in their mRNA and phosphatidylserine content, respectively.
- the recombinant chimeric protein CR3 was selected, which is a multiepitopic HIV-1 antigen [Iglesias E et al. J Biochem Mol Biol & Biophys (2001) 1: 109-122].
- the dose used was 5 ⁇ g of each antigen per route, and the immunogens were administered on days 0, 7 and 21 of the immunization schedule.
- SC immunization the Proteins were dissolved in PBS and adsorbed in 1.4 mg / mL of aluminum hydroxide (Superfos Biosector A / S, Vedbaek, Denmark).
- IP intraperitoneal
- the animals were anesthetized by intraperitoneal (IP) administration of 30 ⁇ _ of ketamine (10 mg / mL), placed supine, and immunogens were slowly dispensed in 50 ⁇ (25 ⁇ / per nostril) with a pipette tip.
- IP intraperitoneal
- the serum IgG response was evaluated by an indirect ELISA where the plates were coated with the CR3 protein.
- the methodology for the quantification of IFN- ⁇ secretion in supernatants of cultures stimulated with CR3 has been previously reported [Garc ⁇ a Diaz D et al. Immunol Lett (2013) 149: 77-84].
- the Gaussian distribution of the data was evaluated with the Kolmogorov-Smirnov test and the equality of variance with the Bartlett test. Samples with normal distribution (or those that are inferred by the Gaussian distribution) and with equal variance were compared with parametric tests. Otherwise, an alternative non-parametric test was selected. All IgG titles were transformed to log 10, to achieve a normal distribution of values. Serums from animals that did not reach seroconversion were assigned an arbitrary 1: 10 title for statistical processing. A value of p ⁇ 0.05 was considered statistically significant.
- Example 6 Passive immunization by adoptive transfer of cells from Balb / c mice immunized with HBcAg and HBsAg antigen formulations with modifications in their mRNA and phosphatidylserine content, respectively, to transgenic Balb / c mice expressing HBsAg
- the present invention it is desired to enhance the immune response anti-HBsAg and anti-HBcAg in donors, from the active immunization of individuals with a formulation containing the HBsAg and HBcAg antigens, which comprise modifications in their phosphatidylserine and mRNA content, respectively and, additionally, the cells to be transferred would be activated in vitro, prior to transfer, so that the response against these antigens is maximal when the cells are inoculated into the recipient organism. In this way, a type of non-existent response is obtained artificially in people, allowing to broaden the donor margin to people with similar haplotypes, regardless of whether they have been infected or not by HBV.
- the effect of the immune response generated by vaccination with a formulation composed of the HBsAg and HBcAg antigens with modifications in their phosphatidylserine and mRNA content, respectively, is evaluated by means of adoptive cell transfer. along the IN / parenteral routes, in the context of a transgenic mouse that expresses HBsAg, a model of persistent HBV infection.
- One of the objectives of the study was the evaluation of the effect of the transferred immune response on the concentration of HBsAg (antigenemia) in the serum of the transgenic mouse.
- mice Female Balb / c mice, 8 to 12 weeks old.
- the mice were immunized with a vaccine preparation containing the modified antigens HBsAg (with phosphatidylserine content greater than 5%) and HBcAg (with mRNA content greater than 45%), simultaneously by the IN and parenteral routes. Within the parenteral route, in this case the IM, SC and ID routes were tested.
- the doses (in volume of 100 ⁇ ) were administered on days 0 and 14, and a booster dose was administered on day 100, prior to transfer. Blood extractions were performed by the retrorbital plexus on days -2, 10 and 25.
- Table 8 shows the design of the immunization scheme, including the treatment received by each group. Table 8. Immunization scheme in non-transgenic Balb / c mice.
- mHBcAg HBcAg containing mRNA in a proportion of 50% of the total RNA of said antigen; mHBsAg: HBsAg containing 7% phosphatidylserine within the lipid components of PSV.
- the evaluation of the humoral immune response generated by these treatments was carried out by measuring the IgG response and the subclasses of anti-HBsAg IgG, after each inoculation, using the ELISA technique.
- an ELISPOT type test was performed 10 days after the first administration to measure the secretion of specific IFN- ⁇ against HBsAg by CD8 + lymphocytes from the spleen.
- the results of these evaluations indicate that Group 5 generates the highest cellular response and a humoral response that does not differ from the rest of the groups studied. Based on this, two animals from this group were selected as splenocyte donors for adoptive transfer. Immunogen selection was performed in a 1: 1 ratio (HBsAg: HBcAg)
- mice of Group 5 Fifteen days after receiving the booster dose the two mice of Group 5, and three mice of Group 7 (placebo) were sacrificed and the spleen was removed. The spleens of Group 5 and those of Group 7 were grouped, respectively. The spleens were processed until splenocytes were obtained. Aliquots of 30 x 10 6 cells in 100 ⁇ of 1 X PBS were separated for transfer to recipient mice.
- mice that express HBsAg between 16-20 weeks of age and both sexes, were used as receptors. They were assigned to the different treatment groups as shown in Table 9. Prior to the transfer of splenocytes, a partial blood extraction was performed to check serum HBsAg levels. Subsequently, they were inoculated (via the IP route) 30 x10 6 splenocytes in a volume of 100 ⁇ of 1 X PBS. Blood extractions, to assess the effect of the adoptive transfer of immunity, were carried out through the plexus. retrorbital, weekly, for 5 weeks. In week 8 post-transfer, the animals were bled and slaughtered.
- Serum HBsAg levels were determined by ELISA.
- the plates were coated with the anti-HBsAg monoclonal antibody named Hep4 (produced by the CIGB). All mice that received cells with immunity prior to HBsAg showed, from the evaluation at the post-transfer week, a marked decrease in serum HBsAg, finding significant differences between time zero and the 2nd and 3rd week ⁇ p ⁇ 0.05). From the fourth week (day 35) it is observed that serum HBsAg concentrations begin to increase, which indicates that the control of antigenemia by transferred immunity is disappearing. From this point, and until week 8 (day 63), there is no difference in antigenemia with that reported for the zero time of the trial.
- mice that received the transfer of splenocytes with specific immunity against HBsAg a marked decrease in serum HBsAg was detected, which was most noticeable between days 7 and 28.
- mice that received the transfer of placebo splenocytes, or PBS although fluctuations in serum HBsAg concentration are detected, it never significantly differs from zero time, and values below 5 ⁇ g / ml are never detected.
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EA201892212A EA201892212A1 (ru) | 2016-03-31 | 2017-03-14 | Фармацевтическая композиция, которая включает поверхностные и нуклеокапсидные антигены вируса гепатита b |
BR112018069738A BR112018069738A2 (pt) | 2016-03-31 | 2017-03-14 | composição farmacêutica, uso de um antígeno do núcleo do vírus da hepatite b, e, método para a imunoprofilaxia ou imunoterapia contra a infecção do vírus da hepatite b. |
JP2018551333A JP6981992B2 (ja) | 2016-03-31 | 2017-03-14 | B型肝炎ウイルスの表面及び核内抗原を含む医薬組成物 |
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CN201780033618.XA CN109219449B (zh) | 2016-03-31 | 2017-03-14 | 包含乙型肝炎病毒的表面抗原和核衣壳抗原的药用组合物 |
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US20220193228A1 (en) | 2022-06-23 |
CN109219449A (zh) | 2019-01-15 |
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ES2965709T3 (es) | 2024-04-16 |
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US20200297840A1 (en) | 2020-09-24 |
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