{"id":41847,"date":"2026-06-23T12:50:40","date_gmt":"2026-06-23T10:50:40","guid":{"rendered":"https:\/\/kymos.com\/news\/anticossos-biespecifics-reptes-en-estudis-farmacocinetics-i-dimmunogenicitat\/"},"modified":"2026-06-23T12:50:40","modified_gmt":"2026-06-23T10:50:40","slug":"anticossos-biespecifics-reptes-en-estudis-farmacocinetics-i-dimmunogenicitat","status":"publish","type":"post","link":"https:\/\/kymos.com\/ca\/news\/anticossos-biespecifics-reptes-en-estudis-farmacocinetics-i-dimmunogenicitat\/","title":{"rendered":"Anticossos biespec\u00edfics: reptes en estudis farmacocin\u00e8tics i d&#8217;immunogenicitat"},"content":{"rendered":"<h2>Qu\u00e8 \u00e9s un antic\u00f2s biespec\u00edfic?<\/h2>\n<p data-path-to-node=\"7\"><span style=\"font-size: 14pt;\">Els anticossos biespec\u00edfics (<strong>BsAbs<\/strong>) s\u00f3n anticossos modificats amb la <strong>capacitat \u00fanica d&#8217;unir-se simult\u00e0niament a dos dianes<\/strong> (ant\u00edgens o ep\u00edtops), mostrant una gran efic\u00e0cia, especificitat i perfils de seguretat. L&#8217;aplicabilitat dels <strong>BsAbs que s&#8217;estan desenvolupant inclou la uni\u00f3 intercel\u00b7lular, els efectes de proximitat, la inhibici\u00f3 de doble diana i la focalitzaci\u00f3 cel\u00b7lular dependent de dos tipus d&#8217;ant\u00edgens.<\/strong> Han adquirit un gran inter\u00e8s en les ter\u00e0pies contra el c\u00e0ncer; no obstant aix\u00f2, en els darrers anys, tamb\u00e9 s&#8217;han llan\u00e7at m\u00e9s BsAbs en altres \u00e0rees terap\u00e8utiques. <\/span><\/p>\n<p data-path-to-node=\"9\"><span style=\"font-size: 14pt;\">Els <strong>anticossos estan compostos pel domini cristal\u00b7litzable del fragment (Fc)<\/strong>, que \u00e9s una regi\u00f3 constant que interactua amb els receptors cel\u00b7lulars i el complement, <strong>i el domini d&#8217;uni\u00f3 a l&#8217;antigen del fragment (Fab)<\/strong> que cont\u00e9 una cadena pesada variable i una cadena lleugera variable; aquesta regi\u00f3 \u00e9s la que reconeix la diana.<\/span><\/p>\n<p data-path-to-node=\"10\"><span style=\"font-size: 14pt;\">Els <strong>BsAbs estan dissenyats per tenir dos bra\u00e7os diferents a la regi\u00f3 Fab<\/strong>, amb les seves pr\u00f2pies cadenes lleugeres i pesades variables diferents, <strong>cadascun capa\u00e7 de recon\u00e8ixer una diana espec\u00edfica i, per tant, permetent-los unir-se a dos ant\u00edgens simult\u00e0niament<\/strong>. En dissenyar BsAbs, una consideraci\u00f3 important \u00e9s garantir el correcte assemblatge de les dues cadenes pesades i lleugeres diferents de la regi\u00f3 Fab. A m\u00e9s, les modificacions dels BsAbs a l&#8217;Fc promouen i milloren la seva estabilitat, modifiquen les funcions immunit\u00e0ries i augmenten la seva semivida.  <\/span><\/p>\n<p data-path-to-node=\"11\"><span style=\"font-size: 14pt;\"><strong>En el desenvolupament de BsAbs, \u00e9s essencial seleccionar el candidat \u00f2ptim.<\/strong> Aquesta selecci\u00f3 es basa en les propietats fisicoqu\u00edmiques, el format, l&#8217;especificitat, la farmacocin\u00e8tica (PK) i els efectes terap\u00e8utics previstos.<\/span><\/p>\n<h2 data-path-to-node=\"12\">Quins par\u00e0metres es consideren habitualment en el desenvolupament de BsAbs?<\/h2>\n<p data-path-to-node=\"13\"><span style=\"font-size: 14pt;\">Per garantir la seguretat, la qualitat i l&#8217;efic\u00e0cia, els programes anal\u00edtics han d&#8217;avaluar diversos atributs de qualitat cr\u00edtics (CQAs) en quatre categories principals:<\/span><\/p>\n<ul data-path-to-node=\"14\">\n<li>\n<p data-path-to-node=\"14,0,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"14,0,0\" data-index-in-node=\"0\">Seguretat:<\/b> Endotoxines, micoplasma, immunogenicitat (ADA, NAb), pres\u00e8ncia de pat\u00f2gens.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"14,1,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"14,1,0\" data-index-in-node=\"0\">Qualitat:<\/b> Glicosilaci\u00f3, agregaci\u00f3, prote\u00efnes de c\u00e8l\u00b7lules hoste (HCP), ADN de c\u00e8l\u00b7lules hoste (HCDNA).<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"14,2,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"14,2,0\" data-index-in-node=\"0\">Identitat i puresa:<\/b> Mida, seq\u00fc\u00e8ncia d&#8217;amino\u00e0cids, an\u00e0lisi de glicans (ELISA, LC-MS, SEC-HPLC, SDS-PAGE).<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"14,3,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"14,3,0\" data-index-in-node=\"0\">Pot\u00e8ncia:<\/b> Uni\u00f3 a la diana (ELISA, SPR), resposta cel\u00b7lular i citotoxicitat (assajos basats en c\u00e8l\u00b7lules, ADCC).<\/span><\/p>\n<\/li>\n<\/ul>\n<h2>Consideracions precl\u00edniques i cl\u00edniques en el desenvolupament de BsAbs<\/h2>\n<h3>Farmacocin\u00e8tica (PK)<\/h3>\n<p>&nbsp;<\/p>\n<p data-path-to-node=\"17\"><span style=\"font-size: 14pt;\">Els <strong>BsAbs presenten reptes farmacocin\u00e8tics \u00fanics<\/strong> que afecten l&#8217;avaluaci\u00f3 dels perfils de PK, els esquemes de dosificaci\u00f3, la semivida i l&#8217;eliminaci\u00f3. Com que els BsAbs tenen una baixa estabilitat al tracte gastrointestinal i una permeabilitat disminu\u00efda a la paret intestinal, no s\u00f3n candidats orals adequats. En canvi, els <strong>BsAbs es poden administrar per injecci\u00f3 intravenosa (IV), intraperitoneal (IP) o subcut\u00e0nia (SC).<\/strong>  <\/span><\/p>\n<p data-path-to-node=\"18\"><span style=\"font-size: 14pt;\"><strong>La seva mida molecular i altres propietats fisicoqu\u00edmiques afecten directament la seva distribuci\u00f3 i permeaci\u00f3 tissular.<\/strong> La regi\u00f3 Fc dels BsAbs \u00e9s responsable de mantenir i millorar la pres\u00e8ncia sist\u00e8mica, reduint aix\u00ed la necessitat de dosificacions freq\u00fcents.<\/span><\/p>\n<p data-path-to-node=\"19\"><span style=\"font-size: 14pt;\">Com que el perfil de PK i la linealitat poden ser diferents dels anticossos monoclonals (mAbs) convencionals, <strong>\u00e9s fonamental que els estudis bioanal\u00edtics de PK estableixin exactament quin analit o analits s&#8217;han de mesurar, ja sigui antic\u00f2s total, bra\u00e7os actius individuals o complexos units.<\/strong><\/span><\/p>\n<h3 data-path-to-node=\"20\">Farmacodin\u00e0mica (PD)<\/h3>\n<p>&nbsp;<\/p>\n<p data-path-to-node=\"21\"><span style=\"font-size: 14pt;\">Com a part de l&#8217;avaluaci\u00f3 de la seguretat, <strong>es poden mesurar biomarcadors i citocines espec\u00edfics.<\/strong> Aquest \u00e9s un pas vital durant les fases d&#8217;escalada de dosis, ja que l&#8217;augment de les dosis pot causar la s\u00edndrome d&#8217;alliberament de citocines (CRS).<\/span><\/p>\n<h3 data-path-to-node=\"22\">Risc d&#8217;immunogenicitat<\/h3>\n<p>&nbsp;<\/p>\n<p data-path-to-node=\"23\"><span style=\"font-size: 14pt;\">L&#8217;<strong>avaluaci\u00f3 dels anticossos anti-f\u00e0rmac (ADA) \u00e9s significativament m\u00e9s dif\u00edcil en comparaci\u00f3 amb els assajos ADA est\u00e0ndard per a mAbs convencionals.<\/strong> L&#8217;enfocament tradicional de m\u00faltiples nivells ha de passar per un <strong>pas de caracteritzaci\u00f3 addicional durant l&#8217;etapa confirmat\u00f2ria per mapejar les respostes contra cada domini funcional individual de la mol\u00e8cula biespec\u00edfica.<\/strong><\/span><\/p>\n<h2 data-path-to-node=\"24\">Marc regulador de compliment<\/h2>\n<p data-path-to-node=\"25\"><span style=\"font-size: 14pt;\">El desenvolupament de m\u00e8todes bioanal\u00edtics robustos requereix una estricta adhesi\u00f3 als marcs reguladors internacionals. Les directrius clau inclouen: <\/span><\/p>\n<ul data-path-to-node=\"26\">\n<li>\n<p data-path-to-node=\"26,0,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"26,0,0\" data-index-in-node=\"0\">ICH M10:<\/b> Directriu de validaci\u00f3 de m\u00e8todes bioanal\u00edtics.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"26,1,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"26,1,0\" data-index-in-node=\"0\">Directrius de l&#8217;EMA:<\/b> Directriu sobre la investigaci\u00f3 cl\u00ednica de la farmacocin\u00e8tica de prote\u00efnes terap\u00e8utiques, incloent un \u00e8mfasi espec\u00edfic en la caracteritzaci\u00f3 detallada de les impureses relacionades amb el producte (com la secci\u00f3 7.4 de la directriu de 2017).<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"26,2,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"26,2,0\" data-index-in-node=\"0\">Guia de la FDA:<\/b> Programes de desenvolupament d&#8217;anticossos biespec\u00edfics Guia per a la ind\u00fastria (2021) i els marcs de guia de 2019 (incloent la secci\u00f3 IV.A.3).<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"27\">Reptes de PK i immunogenicitat dels BsAbs: l&#8217;experi\u00e8ncia de Kymos<\/h2>\n<p data-path-to-node=\"28\"><span style=\"font-size: 14pt;\">\u00c9s cert que els BsAbs presenten reptes anal\u00edtics addicionals en comparaci\u00f3 amb els anticossos monoclonals convencionals a causa de la seva complexitat estructural i les seves propietats d&#8217;uni\u00f3 a doble diana.<\/span><\/p>\n<p data-path-to-node=\"29\"><span style=\"font-size: 14pt;\">Segons la nostra experi\u00e8ncia, <strong>es requereix una atenci\u00f3 particular durant el desenvolupament de l&#8217;assaig<\/strong>. \u00c9s important <strong>avaluar a fons les possibles interfer\u00e8ncies de la diana<\/strong>. A m\u00e9s, \u00e9s <strong>crucial seleccionar el format d&#8217;assaig m\u00e9s adequat<\/strong>, <strong>caracteritzar acuradament els reactius cr\u00edtics<\/strong> i <strong>garantir un rendiment adequat de l&#8217;assaig<\/strong> en la matriu biol\u00f2gica desitjada.  <\/span><\/p>\n<p data-path-to-node=\"30\"><span style=\"font-size: 14pt;\">A trav\u00e9s dels nostres projectes de BsAb, hem adquirit una valuosa experi\u00e8ncia en la gesti\u00f3 dels reptes comuns associats a aquestes mol\u00e8cules. <strong>Amb un desenvolupament i optimitzaci\u00f3 exhaustius i detallats dels m\u00e8todes anal\u00edtics, creiem que es poden establir assajos de PK i ADA robustos i fiables<\/strong>. Aix\u00f2 obre el cam\u00ed per al desenvolupament exit\u00f3s de m\u00e8todes anal\u00edtics per a BsAbs addicionals que es poden aplicar tant en programes precl\u00ednics com cl\u00ednics. <\/span><\/p>\n<h2 data-path-to-node=\"31\">Com pot ajudar Kymos Group en el desenvolupament de BsAbs?<\/h2>\n<p data-path-to-node=\"32\"><span style=\"font-size: 14pt;\">Kymos Group ofereix un conjunt complet de capacitats anal\u00edtiques per donar suport tant als requisits bioanal\u00edtics com als de CMC de biol\u00f2gics complexos:<\/span><\/p>\n<ul data-path-to-node=\"33\">\n<li>\n<p data-path-to-node=\"33,0,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"33,0,0\" data-index-in-node=\"0\">CMC i propietats fisicoqu\u00edmiques:<\/b> Caracteritzaci\u00f3 d&#8217;anticossos, mida molecular, determinaci\u00f3 de seq\u00fc\u00e8ncies i proves microbiol\u00f2giques.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"33,1,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"33,1,0\" data-index-in-node=\"0\">Proves funcionals i de pot\u00e8ncia:<\/b> Uni\u00f3 a la diana i interaccions proteiques mitjan\u00e7ant ELISA o SPR, juntament amb assajos de citotoxicitat i pot\u00e8ncia basats en c\u00e8l\u00b7lules.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"33,2,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"33,2,0\" data-index-in-node=\"0\">Bioan\u00e0lisi precl\u00ednica i cl\u00ednica:<\/b> Avaluaci\u00f3 del nivell farmacocin\u00e8tic mitjan\u00e7ant assajos d&#8217;uni\u00f3 a lligands (LBA).<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"33,3,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"33,3,0\" data-index-in-node=\"0\">PD i biomarcadors:<\/b> Capacitat de multiplexaci\u00f3 per al seguiment de diferents citocines, factors i interleucines.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"33,4,0\"><span style=\"font-size: 14pt;\"><b data-path-to-node=\"33,4,0\" data-index-in-node=\"0\">Immunogenicitat avan\u00e7ada:<\/b> Assajos per a ADA d&#8217;uni\u00f3 total, caracteritzaci\u00f3 detallada del domini i detecci\u00f3 d&#8217;anticossos neutralitzants (NAb).<\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-path-to-node=\"32\">Solucions integrals per a anticossos biespec\u00edfics<\/h2>\n<p><span style=\"font-size: 14pt;\">Oferim als nostres clients <strong>assist\u00e8ncia completa en els seus projectes fusionant les nostres capacitats especialitzades de CRO precl\u00ednica i cl\u00ednica<\/strong>, cobrint PK, immunogenicitat, biomarcadors i una caracteritzaci\u00f3 estructural exhaustiva sota un mateix paraigua regulador.<\/span><\/p>\n<h2 data-path-to-node=\"36\">Conclusi\u00f3<\/h2>\n<p data-path-to-node=\"37\"><span style=\"font-size: 14pt;\">El desenvolupament d&#8217;anticossos terap\u00e8utics est\u00e0 superant les limitacions dels anticossos monoclonals (mAbs) convencionals mitjan\u00e7ant l&#8217;enginyeria de BsAbs. El seu mecanisme d&#8217;acci\u00f3 de doble diana els permet actuar efica\u00e7ment sobre vies de malaltia complexes. No obstant aix\u00f2, aquesta caracter\u00edstica \u00fanica, juntament amb la seva complexa arquitectura estructural, subratlla la necessitat absoluta de realitzar una investigaci\u00f3 exhaustiva i fiable tant de l&#8217;efic\u00e0cia com dels atributs de seguretat. A mesura que sorgeixen cont\u00ednuament noves estrat\u00e8gies d&#8217;enginyeria per abordar m\u00e9s condicions cl\u00edniques, aquest camp en evoluci\u00f3 requereix un suport anal\u00edtic robust i tecnologia avan\u00e7ada en cada fase de desenvolupament.   <\/span><\/p>\n<h2 data-path-to-node=\"37\">Refer\u00e8ncies<\/h2>\n<ul>\n<li>\n<p data-path-to-node=\"40,0,0\"><span style=\"font-size: 12pt;\">Tetsuya Wakabayashi, Taichi Kuramochi (2025) Discovery and development of bispecific antibodies. <i data-path-to-node=\"40,0,0\" data-index-in-node=\"97\">Protein Expr Purif.<\/i> 2025 desembre:236:106787. doi: 10.1016\/j.pep.2025.106787. Epub 2025 agost 5.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"40,1,0\"><span style=\"font-size: 12pt;\">Ding Y, Andrien B, Sarkar M i Aimone M (2024). Process Development, Manufacturing, and Clinical Support for Bispecific Antibodies: Chemistry, Manufacturing, and Controls Considerations. <i data-path-to-node=\"40,1,0\" data-index-in-node=\"188\">BioProcess International<\/i> 22(11\u201312). <\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"40,2,0\"><span style=\"font-size: 12pt;\">Department of Health and Human Services Food and Drug Administration Center for Drug Evaluation and Research (CDER) (2021). Bispecific Antibody Development Programs Guidance for Industry. U.S. Center for Biologics Evaluation and Research (CBER) Pharmaceutical Quality\/CMC.  <\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"40,3,0\"><span style=\"font-size: 12pt;\">Choi et al. (2024). Mechanism of Action and Pharmacokinetics of Approved Bispecific Antibodies. <i data-path-to-node=\"40,3,0\" data-index-in-node=\"96\">Biomol Ther (Seoul)<\/i> 2024 octubre 25;32(6):708\u2013722. doi: 10.4062\/biomolther.2024.146.  <\/span><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u00e8 \u00e9s un antic\u00f2s biespec\u00edfic? Els anticossos biespec\u00edfics (BsAbs) s\u00f3n  [&#8230;]<\/p>\n","protected":false},"author":8,"featured_media":41710,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[95],"tags":[],"class_list":["post-41847","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bioanalisi"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bioan\u00e0lisi d&#039;anticossos biespec\u00edfics: reptes de PK &amp; immunogenicitat<\/title>\n<meta name=\"description\" content=\"Explorem els reptes anal\u00edtics dels anticossos biespec\u00edfics (BsAbs) en programes precl\u00ednics i cl\u00ednics, centrant-nos en el disseny d&#039;assajos de PK i el risc d&#039;immunogenicitat multi-nivell.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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