{"id":1641,"date":"2026-06-26T15:32:04","date_gmt":"2026-06-26T14:32:04","guid":{"rendered":"http:\/\/seamlessbio.de\/?page_id=1641"},"modified":"2026-07-06T21:32:13","modified_gmt":"2026-07-06T20:32:13","slug":"stem-cell-research","status":"publish","type":"page","link":"https:\/\/seamlessbio.de\/de\/stem-cell-research\/","title":{"rendered":"Application Stem Cell Research"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"1641\" class=\"elementor elementor-1641\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9ef679d e-con e-atomic-element e-flexbox-base e-fb89e4b\" data-id=\"9ef679d\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"9ef679d\">\n    \t\t<div class=\"elementor-element elementor-element-1cdfa2d elementor-widget elementor-widget-html\" data-id=\"1cdfa2d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<!-- YOAST SEO SETTINGS\nSlug:             applications\/ipsc-stem-cell-culture\nFocus Keyword:    iPSC stem cell culture serum FBS ES Cell Pre-Tested xeno-free\nSEO Title (EN):   iPSC & Stem Cell Culture \u2014 Serum and Xeno-Free Media Guide | SeamlessBio\nMeta Desc (EN):   Complete serum guide for iPSC and stem cell culture. FBS ES Cell Pre-Tested, Donor Horse Serum, rHSA, xeno-free protocols. Neural, cardiac, hematopoietic differentiation. 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Culture<\/strong>\n  <\/div>\n\n  <div class=\"hero\">\n    <span class=\"ey\">SeamlessBio \u2014 Solutions by Application<\/span>\n    <h1>iPSC &amp; Stem Cell Culture \u2014 Serum and Xeno-Free Media Selection Guide<\/h1>\n    <p class=\"sub\">iPSCs and ESCs are the foundation of disease modelling, drug screening, and cell therapy manufacturing. iPSC technology is converging with CAR-T and gene therapy \u2014 iPSC-derived CAR-T cells offer off-the-shelf allogeneic cell therapy at industrial scale. Every stem cell programme requires carefully selected serum or serum-free supplements \u2014 the wrong grade compromises pluripotency, introduces xenogenic contamination, or fails to support directed differentiation.<\/p>\n    <div class=\"hbtns\">\n      <a href=\"https:\/\/seamlessbio.de\/about-us\/contact-imprint\/\" class=\"btn1\">Kontakt<\/a>\n      <a href=\"https:\/\/shop.seamlessbio.de\" class=\"btn2\">Im Shop ansehen<\/a>\n    <\/div>\n  <\/div>\n\n  <!-- KEY PRINCIPLE NOTE -->\n  <div class=\"note\">\n    <strong>Key principle \u2014 serum in stem cell culture:<\/strong>\n    FBS ES Cell Pre-Tested is the only appropriate FBS grade for ESC and iPSC maintenance. Standard FBS lots contain undefined factors \u2014 particularly BMP signalling activators \u2014 that drive spontaneous differentiation. ES Cell Pre-Tested lots are individually screened for ability to maintain pluripotency markers (Oct4, Sox2, Nanog) and compact colony morphology. For GMP-grade iPSC manufacturing, xeno-free serum-free conditions with rHSA supplementation are the regulatory standard.\n  <\/div>\n\n  <!-- CARDS -->\n  <div class=\"cards\">\n    <div class=\"card\">\n      <span class=\"num\">01<\/span>\n      <h3>FBS ES-Zelle, vorab getestet<\/h3>\n      <p>Lot-screened for Oct4, Sox2, Nanog expression and spontaneous differentiation rate &lt;5% per passage. The only appropriate FBS grade for ESC\/iPSC feeder-dependent maintenance.<\/p>\n    <\/div>\n    <div class=\"card\">\n      <span class=\"num\">02<\/span>\n      <h3>Spenderpferdeserum (DHS)<\/h3>\n      <p>Standard supplement for hematopoietic CFU assays (CFU-GM, BFU-E) in methylcellulose medium. Provides unique lipid and growth factor composition that FBS cannot replicate for myeloid\/erythroid progenitor expansion.<\/p>\n    <\/div>\n    <div class=\"card\">\n      <span class=\"num\">03<\/span>\n      <h3>rHSA Premium Grade \u2014 Xeno-Free<\/h3>\n      <p>Recombinant HSA for xeno-free and GMP iPSC protocols \u2014 defined albumin without donor variability. For chemically defined maintenance media (mTeSR, E8), cryopreservation, and iPSC-CAR-T expansion.<\/p>\n    <\/div>\n    <div class=\"card\">\n      <span class=\"num\">04<\/span>\n      <h3>Human Serum AB OTC Male \u2014 iPSC-CAR-T<\/h3>\n      <p>iPSC-derived T cell products require human serum for final T cell expansion and activation \u2014 same EMA\/410\/01 requirements as primary CAR-T manufacturing. AB type, male donors, off-the-clot.<\/p>\n    <\/div>\n  <\/div>\n\n  <!-- 2-COL -->\n  <div class=\"two\">\n    <div>\n      <h2>Why standard FBS fails in iPSC culture<\/h2>\n      <p>Standard FBS contains undefined bioactive components \u2014 particularly bone morphogenetic proteins (BMPs), activin, and other TGF-\u03b2 superfamily members \u2014 that activate differentiation signalling in pluripotent stem cells. Lot-to-lot variation in these factors means that some standard FBS lots are completely incompatible with ESC\/iPSC maintenance, causing rapid spontaneous differentiation within 1\u20132 passages.<\/p>\n      <p>FBS ES Cell Pre-Tested lots are individually screened in ESC culture before release. Screening criteria include: maintenance of Oct4, Sox2, Nanog, and SSEA-4 expression after 5\u20137 days of culture; compact dome-shaped colony morphology; spontaneous differentiation rate &lt;5% of cells per passage; and normal karyotype maintenance over at least 10 passages.<\/p>\n      <p>For modern feeder-free protocols (mTeSR1, E8), serum is eliminated entirely \u2014 replaced by chemically defined growth factors (FGF2, TGF-\u03b21, insulin, transferrin, ascorbic acid). In these systems, rHSA serves as the albumin carrier for lipids and growth factor stabilisation, replacing bovine albumin with a defined, lot-consistent animal-free alternative.<\/p>\n      <p><strong>Batch reservation for iPSC programmes:<\/strong> iPSC reprogramming and long-term maintenance programmes can run for 12\u201336 months. A serum lot change mid-programme can shift culture conditions enough to alter karyotypic stability and epigenetic state. SeamlessBio holds reserved FBS ES Cell Pre-Tested lots for up to 12 months \u2014 ensuring consistency from initial reprogramming through the full iPSC characterisation and banking workflow.<\/p>\n    <\/div>\n    <div>\n      <h3>Recommended products<\/h3>\n      <ul>\n        <li><a href=\"https:\/\/seamlessbio.de\/de\/products\/fetal-bovine-serum\/fbs-es-cell-pre-tested\/\">FBS ES-Zelle, vorab getestet<\/a> \u2014 feeder-dependent ESC\/iPSC maintenance<\/li>\n        <li><a href=\"https:\/\/seamlessbio.de\/de\/products\/animal-sera\/horse-serum-donor-dhs\/\">Spenderpferdeserum (DHS)<\/a> \u2014 CFU-GM, BFU-E hematopoietic assays<\/li>\n        <li><a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">rHSA Premium Grade<\/a> \u2014 GMP xeno-free maintenance and cryo<\/li>\n        <li><a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-economy-grade\/\">rHSA Economy Grade<\/a> \u2014 research-scale serum-free media<\/li>\n        <li><a href=\"https:\/\/seamlessbio.de\/de\/products\/human-sera-plasma-and-more\/human-serum-off-the-clot-type-ab-male\/\">Human Serum AB OTC Male<\/a> \u2014 iPSC-CAR-T T cell expansion<\/li>\n        <li><a href=\"https:\/\/seamlessbio.de\/de\/products\/human-sera-plasma-and-more\/human-platelet-lysate-hpl\/\">Lysat aus menschlichen Blutpl\u00e4ttchen (hPL)<\/a> \u2014 xeno-free MSC expansion<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n\n  <!-- SERUM BY APPLICATION TABLE -->\n  <div class=\"sec\">\n    <h2>Serum Requirements by Stem Cell Application<\/h2>\n    <div class=\"tw\">\n      <table>\n        <thead><tr><th>Anwendung<\/th><th>Recommended Product<\/th><th>Why<\/th><\/tr><\/thead>\n        <tbody>\n          <tr>\n            <td><strong>ESC \/ iPSC maintenance on feeder cells<\/strong><\/td>\n            <td><a href=\"https:\/\/seamlessbio.de\/de\/products\/fetal-bovine-serum\/fbs-es-cell-pre-tested\/\">FBS ES-Zelle, vorab getestet<\/a> \u2014 15\u201320% in DMEM\/F12 or KnockOut DMEM<\/td>\n            <td>Lot-tested for Oct4, Sox2, Nanog expression. Spontaneous differentiation &lt;5% per passage. Colony morphology validated.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>MEF feeder cell preparation<\/strong><\/td>\n            <td><a href=\"https:\/\/seamlessbio.de\/de\/products\/fetal-bovine-serum\/fbs-es-cell-pre-tested\/\">FBS ES-Zelle, vorab getestet<\/a> \u2014 10% for MEF expansion<\/td>\n            <td>Consistent feeder cell quality requires consistent FBS \u2014 ES Cell Pre-Tested ensures MEF morphology and support function reproducibility.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>Feeder-free iPSC culture (mTeSR, E8)<\/strong><\/td>\n            <td>Serum-free defined medium + <a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">rHSA Premium<\/a> if required<\/td>\n            <td>Chemically defined protocols eliminate serum entirely. rHSA provides albumin without donor variability for xeno-free systems.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>Embryoid body (EB) formation<\/strong><\/td>\n            <td><a href=\"https:\/\/seamlessbio.de\/de\/products\/fetal-bovine-serum\/fbs-es-cell-pre-tested\/\">FBS ES-Zelle, vorab getestet<\/a> \u2014 20% in IMDM or DMEM<\/td>\n            <td>EB formation requires serum for spontaneous multi-lineage differentiation. ES Cell Pre-Tested provides defined starting conditions.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>Hematopoietic differentiation<\/strong><\/td>\n            <td><a href=\"https:\/\/seamlessbio.de\/de\/products\/animal-sera\/horse-serum-donor-dhs\/\">Spenderpferdeserum (DHS)<\/a> \u2014 15\u201330% in methylcellulose<\/td>\n            <td>DHS is specified in StemCell Technologies MethoCult protocols for CFU-GM and BFU-E colony formation. FBS does not provide equivalent myeloid\/erythroid support.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>Neural differentiation<\/strong><\/td>\n            <td>Serum-free (N2\/B27) \u00b1 <a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/\">rHSA<\/a> as protein stabiliser<\/td>\n            <td>Serum drives astrocyte differentiation and blocks neuronal specification \u2014 neural protocols are serum-free by requirement.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>Cardiac differentiation (cardiomyocytes)<\/strong><\/td>\n            <td><a href=\"https:\/\/seamlessbio.de\/de\/products\/fetal-bovine-serum\/fbs-es-cell-pre-tested\/\">FBS ES-Zelle, vorab getestet<\/a> \u2014 20% in early EB stage; serum-free from day 5<\/td>\n            <td>CHIR99021\/Wnt activation protocol requires defined serum in early stage. Serum-free from day 5 for cardiomyocyte specification.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>iPSC-CAR-T manufacturing<\/strong><\/td>\n            <td><a href=\"https:\/\/seamlessbio.de\/de\/products\/human-sera-plasma-and-more\/human-serum-off-the-clot-type-ab-male\/\">Human Serum AB Male OTC<\/a> for T cell expansion<\/td>\n            <td>iPSC-derived T cells require human serum for final expansion \u2014 same EMA\/410\/01 requirements as primary CAR-T manufacturing.<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>GMP iPSC manufacturing<\/strong><\/td>\n            <td>Xeno-free serum-free + <a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">rHSA Premium Grade<\/a><\/td>\n            <td>Regulatory standard for clinical-grade iPSC \u2014 no animal-derived components. rHSA provides defined albumin supplementation.<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n  <\/div>\n\n  <!-- FBS ES CELL PRE-TESTED COMPARISON -->\n  <div class=\"sec\">\n    <h2>FBS ES Cell Pre-Tested vs Standard FBS \u2014 What Makes It Different<\/h2>\n    <div class=\"tw\">\n      <table>\n        <thead><tr><th>Parameter<\/th><th>Standard FBS<\/th><th>FBS ES-Zelle, vorab getestet<\/th><\/tr><\/thead>\n        <tbody>\n          <tr><td><strong>Pluripotency testing<\/strong><\/td><td>Not tested<\/td><td>\u2705 Oct4, Sox2, Nanog expression validated per lot<\/td><\/tr>\n          <tr><td><strong>Spontaneous differentiation rate<\/strong><\/td><td>Variable \u2014 can be &gt;20% per passage<\/td><td>\u2705 \u22645% per passage \u2014 lot specification<\/td><\/tr>\n          <tr><td><strong>Colony morphology<\/strong><\/td><td>Not assessed<\/td><td>\u2705 Compact dome-shaped colony morphology validated<\/td><\/tr>\n          <tr><td><strong>Growth factor profile<\/strong><\/td><td>Undefined \u2014 lot-to-lot variable<\/td><td>Lot-selected for LIF-independent pluripotency support<\/td><\/tr>\n          <tr><td><strong>Endotoxin<\/strong><\/td><td>Variable \u2014 can drive differentiation<\/td><td>Low endotoxin \u2014 LPS activates BMP\/differentiation signalling<\/td><\/tr>\n          <tr><td><strong>Batch reservation<\/strong><\/td><td>Standard<\/td><td>\u2705 Extended reservation \u2014 multi-year iPSC programmes<\/td><\/tr>\n          <tr><td><strong>Documentation<\/strong><\/td><td>CoA standard<\/td><td>\u2705 Pluripotency test report + CoA + batch data per lot<\/td><\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n  <\/div>\n\n  <!-- DONOR HORSE SERUM -->\n  <div class=\"sec\">\n    <h2>Donor Horse Serum (DHS) for Hematopoietic Assays<\/h2>\n    <p>Donor Horse Serum collected from adult horses via regular donation (not terminal bleed) is the standard supplement for hematopoietic colony-forming unit (CFU) assays and myeloid differentiation protocols. DHS provides a unique growth factor and lipid composition that supports erythroid and myeloid progenitor expansion in ways that FBS cannot replicate \u2014 it is specifically named in StemCell Technologies MethoCult published protocols.<\/p>\n    <div class=\"tw\">\n      <table>\n        <thead><tr><th>Anwendung<\/th><th>DHS Concentration<\/th><th>Protocol Note<\/th><\/tr><\/thead>\n        <tbody>\n          <tr><td><strong>CFU-GM assay<\/strong> (myeloid progenitors)<\/td><td>15\u201330% in methylcellulose medium<\/td><td>Standard StemCell Technologies MethoCult protocol \u2014 DHS specified as serum source for myeloid colony formation<\/td><\/tr>\n          <tr><td><strong>BFU-E assay<\/strong> (erythroid progenitors)<\/td><td>15\u201330% in methylcellulose<\/td><td>Erythropoietin-stimulated BFU-E colony formation \u2014 DHS provides lipid factors for haemoglobin synthesis in erythroid progenitors<\/td><\/tr>\n          <tr><td><strong>iPSC hematopoietic differentiation<\/strong><\/td><td>10\u201320% in differentiation medium<\/td><td>Stage-specific use during myeloid specification from iPSC-derived hemogenic endothelium<\/td><\/tr>\n          <tr><td><strong>Bone marrow stromal cell support<\/strong><\/td><td>10\u201315% in stromal culture medium<\/td><td>MSC and stromal cell maintenance for hematopoietic support co-culture systems<\/td><\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n  <\/div>\n\n  <!-- rHSA TABLE -->\n  <div class=\"sec\">\n    <h2>rHSA for Xeno-Free and GMP Stem Cell Protocols<\/h2>\n    <p>Recombinant Human Serum Albumin (rHSA) is the critical protein supplement for xeno-free and chemically defined stem cell culture systems \u2014 replacing animal-derived albumin with a defined, lot-consistent alternative. SeamlessBio supplies rHSA in three grades: Premium (rice-expressed, highest purity, GMP-grade), Economy (yeast-expressed, research use), and CHO-Expressed (mammalian glycosylation profile).<\/p>\n    <div class=\"tw\">\n      <table>\n        <thead><tr><th>Anwendung<\/th><th>rHSA Grade<\/th><th>Concentration<\/th><th>Function<\/th><\/tr><\/thead>\n        <tbody>\n          <tr><td><strong>Xeno-free iPSC maintenance medium<\/strong><\/td><td><a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">Premium<\/a> or <a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-economy-grade\/\">Economy<\/a><\/td><td>0.5\u20132 mg\/mL<\/td><td>Albumin carrier for lipids and fatty acids \u2014 replaces bovine albumin in defined media without donor variability<\/td><\/tr>\n          <tr><td><strong>GMP iPSC cryopreservation<\/strong><\/td><td><a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">Premium Grade<\/a><\/td><td>4\u201310% in cryopreservation medium<\/td><td>Protein cryoprotectant \u2014 replaces FBS in xeno-free freezing protocols with defined composition<\/td><\/tr>\n          <tr><td><strong>Feeder-free culture supplement<\/strong><\/td><td><a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-economy-grade\/\">Economy<\/a> (research) or <a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">Premium<\/a> (GMP)<\/td><td>0.1\u20131 mg\/mL<\/td><td>Stabilises growth factors and protects cells from oxidative stress \u2014 no serum growth factors or undefined components<\/td><\/tr>\n          <tr><td><strong>iPSC-CAR-T serum-free expansion<\/strong><\/td><td><a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">Premium Grade<\/a><\/td><td>2\u20135 mg\/mL<\/td><td>Albumin supplement in serum-free T cell expansion medium for clinical-grade iPSC-derived CAR-T products<\/td><\/tr>\n          <tr><td><strong>Neural differentiation media<\/strong><\/td><td><a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-economy-grade\/\">Economy Grade<\/a><\/td><td>0.5\u20131 mg\/mL<\/td><td>Protein stabiliser in N2\/B27-supplemented serum-free neural differentiation medium<\/td><\/tr>\n        <\/tbody>\n      <\/table>\n    <\/div>\n  <\/div>\n\n  <!-- FAQ -->\n  <div class=\"faq\">\n    <h2>Frequently Asked Questions<\/h2>\n    <div class=\"faq-item\">\n      <div class=\"faq-q\">Why can standard FBS not be used for ESC\/iPSC maintenance?<\/div>\n      <div class=\"faq-a\">Standard FBS contains undefined BMP signalling activators and other TGF-\u03b2 superfamily members that activate differentiation programmes in pluripotent stem cells. Lot-to-lot variability in these factors means some standard FBS lots are completely incompatible with pluripotency maintenance \u2014 cells differentiate within 1\u20132 passages. FBS ES Cell Pre-Tested lots are individually screened in ESC culture for maintenance of Oct4, Sox2, Nanog and SSEA-4 expression, compact colony morphology, and spontaneous differentiation rate &lt;5% per passage before release.<\/div>\n    <\/div>\n    <div class=\"faq-item\">\n      <div class=\"faq-q\">When is Donor Horse Serum preferred over FBS for stem cell applications?<\/div>\n      <div class=\"faq-a\">DHS is specifically required for hematopoietic CFU assays using methylcellulose-based media. The published protocols from StemCell Technologies (MethoCult) and standard haematology laboratories specify DHS at 15\u201330% as the serum source \u2014 FBS does not provide equivalent support for BFU-E and CFU-GM colony formation because it lacks the specific lipid factors required for haemoglobin synthesis in erythroid progenitors. For all other stem cell applications, FBS ES Cell Pre-Tested is the appropriate grade.<\/div>\n    <\/div>\n    <div class=\"faq-item\">\n      <div class=\"faq-q\">What is the difference between rHSA Premium Grade and rHSA Economy Grade?<\/div>\n      <div class=\"faq-a\">rHSA Premium Grade is produced in Oryza sativa (rice) expression system \u2014 highest purity, lowest endotoxin, with full GMP documentation package for clinical-grade stem cell and cell therapy manufacturing. rHSA Economy Grade is produced in Saccharomyces cerevisiae \u2014 suitable for research applications and process development where GMP documentation is not required. rHSA CHO-Expressed provides a mammalian glycosylation profile for applications where glycosylation state affects function. For clinical-grade iPSC manufacturing and GMP cryopreservation, Premium Grade is the correct specification.<\/div>\n    <\/div>\n    <div class=\"faq-item\">\n      <div class=\"faq-q\">How long can I reserve an FBS ES Cell Pre-Tested lot?<\/div>\n      <div class=\"faq-a\">SeamlessBio holds reserved FBS ES Cell Pre-Tested lots for up to 12 months at no cost during the evaluation and initial reprogramming phase. For multi-year iPSC programmes, extended reservation can be arranged on request \u2014 typically securing 24\u201336 months of supply from a single lot to cover the full reprogramming, characterisation, MCB banking, and research programme without lot changes that could affect karyotypic stability or epigenetic state.<\/div>\n    <\/div>\n    <div class=\"faq-item\">\n      <div class=\"faq-q\">Which serum is correct for iPSC cryopreservation?<\/div>\n      <div class=\"faq-a\">For feeder-dependent iPSC maintained in FBS ES Cell Pre-Tested: cryopreservation in 90% FBS ES Cell Pre-Tested + 10% DMSO \u2014 using the same lot as the culture medium is critical. For xeno-free and GMP protocols: 4\u201310% rHSA Premium Grade + 10% DMSO in a defined base medium (DMEM\/F12 or equivalent). The rHSA concentration must be validated for your specific iPSC line \u2014 recovery rates differ between 4% and 10% rHSA depending on the cell line and cooling rate.<\/div>\n    <\/div>\n    <div class=\"faq-item\">\n      <div class=\"faq-q\">Can Human Platelet Lysate (hPL) replace FBS for iPSC expansion?<\/div>\n      <div class=\"faq-a\">hPL has been successfully used for MSC expansion in xeno-free protocols, but evidence for iPSC maintenance in hPL is limited compared to FBS ES Cell Pre-Tested or defined serum-free systems. hPL is most appropriate as an FBS replacement for MSC feeder cells or for iPSC-derived MSC expansion \u2014 not as a direct replacement for FBS ES Cell Pre-Tested in undifferentiated iPSC maintenance. For GMP iPSC programmes, defined serum-free media with rHSA supplementation is the regulatory gold standard.<\/div>\n    <\/div>\n  <\/div>\n\n  <!-- RELATED -->\n  <div class=\"related\">\n    <h3>Related Applications &amp; Products<\/h3>\n    <div class=\"rel-grid\">\n      <a href=\"https:\/\/seamlessbio.de\/de\/applications\/car-t-cell-manufacturing\/\">\u2192 CAR-T Cell Manufacturing Guide<\/a>\n      <a href=\"https:\/\/seamlessbio.de\/de\/applications\/cell-therapy-atmps\/\">\u2192 Cell Therapy &amp; ATMP Manufacturing<\/a>\n      <a href=\"https:\/\/seamlessbio.de\/de\/applications\/organoid-3d-cell-culture\/\">\u2192 Organoid &amp; 3D Cell Culture<\/a>\n      <a href=\"https:\/\/seamlessbio.de\/de\/products\/fetal-bovine-serum\/fbs-es-cell-pre-tested\/\">\u2192 FBS ES Cell Pre-Tested<\/a>\n      <a href=\"https:\/\/seamlessbio.de\/de\/products\/animal-sera\/horse-serum-donor-dhs\/\">\u2192 Donor Horse Serum (DHS)<\/a>\n      <a href=\"https:\/\/seamlessbio.de\/de\/products\/albumin-proteins\/rec-human-serum-albumin-rec-hsa\/rhsa-premium-grade\/\">\u2192 rHSA Premium Grade<\/a>\n    <\/div>\n  <\/div>\n\n  <!-- CTA -->\n  <div class=\"cta\">\n    <h2>Request Free Test Volumes &amp; Batch Reservation<\/h2>\n    <p>FBS ES Cell Pre-Tested lot-specific pluripotency test reports available. rHSA Premium Grade samples for xeno-free protocol validation. Extended lot reservation for multi-year iPSC programmes on request.<br>Email: info@seamlessbio.de | +49 851 37932226<\/p>\n    <div class=\"ctabtns\">\n      <a href=\"mailto:info@seamlessbio.de\" class=\"ctab1\">Kontakt<\/a>\n      <a href=\"https:\/\/shop.seamlessbio.de\" class=\"ctab2\">Im Shop ansehen<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n<\/section>\t\t\t\t<\/div>\n\t\t\n<\/div>\n\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Home\/ Applications\/ iPSC &amp; Stem Cell Culture SeamlessBio \u2014 Solutions by Application iPSC &amp; Stem Cell Culture \u2014 Serum and Xeno-Free Media Selection Guide iPSCs and ESCs are the foundation [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_eb_attr":"","footnotes":""},"class_list":["post-1641","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Biologicals for Stem Cell Research | SeamlessBio<\/title>\n<meta name=\"description\" content=\"Functionally pre-tested FBS &amp; xeno-free hPL for stem cell and iPSC culture. 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