United States

Background: Obesity is associated with relative growth hormone (GH) deficiency and increased fracture risk. We hypothesized that GH administration would improve bone endpoints in individuals with overweight/obesity.
Methods: 77 adults ages 18-65 years, BMI ≥25 kg/m², and BMD T- or Z-score ≤ -1.0 were randomized in a double-blind protocol to daily subcutaneous GH or placebo for 18 months, targeting IGF-1 in the upper quartile of the age-appropriate normal range. There was a post-treatment observation period from 18-24 months. DXA and high-resolution peripheral quantitative CT were performed at baseline, 18 months and 24 months. Volumetric quantitative CT was performed at baseline and 18 months. Results are reported as mean ±SD or mean (95% confidence interval).
Results: There were no pretreatment differences between the GH (n=39) and placebo groups (n=38), including mean age (48±12y), BMI (33.1±5.7kg/m²) and BMD at any site. Forty-nine subjects (47% female) completed 18 months. P1NP, osteocalcin and CTX increased (p&lt;0.005) and visceral adipose tissue decreased (p=0.04) at 18 months in the GH vs placebo group. Hip and radius aBMD, spine and tibial vBMD, tibial cortical thickness, and radial and tibial failure load decreased at 18 months in the GH vs placebo group (p&lt;0.05). During the post-treatment observation period (18 to 24 months), total radius aBMD and tibia cortical thickness increased in the GH vs placebo group (p&lt;0.05); there was also a trend toward an increase in total hip aBMD in the GH vs placebo group (p=0.06). At 24 months, none of the differences between the GH and placebo groups remained significant. There was a higher incidence of numbness and tingling (33% vs 8%, p=0.01) and joint pain or stiffness (33% vs 5%, p=0.003) in the GH vs placebo group. There were no other differences in adverse events between groups.
Conclusions: We demonstrated that GH administration for 18 months to individuals with overweight/obesity and low BMD decreased some measures of BMD, bone microarchitecture, and bone strength compared with placebo. None of these differences remained significant after 6 months off therapy. A longer duration of treatment, or a longer duration of observation post-treatment, may be necessary to see the expected biphasic decline and then increase in BMD reflecting an expanding remodeling space followed by mineralization that has previously been seen with GH administration in other populations, including individuals with and without GH deficiency. Although future investigation of the effects of GH on bone is required to assess the true long-term impact on skeletal integrity as well as fracture reduction, our study suggests that GH administration for 18 months to adults with overweight/obesity does not improve BMD, bone microarchitecture, or bone strength.

ENDO 2022

Impact of GH Administration on Skeletal Endpoints in Adults with Overweight/Obesity

**Program**
ENDO’s comprehensive program provides attendees the opportunity to learn about the latest developments in hormone science and medicine from renowned investigators, expert clinicians, and educators from all over the world. 

This year’s education program features:
more than 100 in-person and virtual sessions with another 70+ in-person only sessions;
six plenary sessions including plenaries on Envisioning Future Therapies for Type 1 Diabetes and Addressing Challenges in Fertility and Reproduction;
over 20 Meet the Professor sessions presented both in-person and live-streamed virtually and another 20+ presented live in Atlanta;
four Basic Science Pathways, including Diabetes and Metabolism; Neuroendocrinology; Nuclear Receptors and Signaling; and Reproductive Endocrinology; and
more than 30 oral sessions and a robust virtual poster hall for accepted scientific abstracts.

**What Programming Is Included in My Virtual Meeting Registration?**
As you build your schedule during the conference, you can select the sessions that are tagged with 'Livestreamed', so you can view virtually. These sessions are being livestreamed, so they are available in real time to our virtual audience. In addition, our in-person and livestreamed sessions will be recorded, so you can access them on demand after 72 hours. We will have over 200 hours available on demand for Standard and Premium pass registrants.

Product theaters and the Communications and Career Center will also include hybrid content delivery.

**Plenaries**
Spanning the spectrum of science, clinical care, and social implications, an outstanding slate of world-renowned speakers will showcase the most cutting-edge advances on research and medicine.

**Symposia**
Our ENDO 2022 lineup of sessions offers a unique opportunity to dive into topics from nearly every major therapeutic area of endocrinology and hormone science. Listen, learn, and be inspired by world-class faculty who are at the forefront of scientific discovery and high-quality health care.

**Basic Science Pathways**

These special “meeting-within-a-meeting” tracks integrate focused discussions, poster sessions, and networking opportunities to provide you with the latest research in:
Diabetes and Metabolism
Neuroendocrinology
Nuclear Receptors and Signaling
Reproductive Endocrinology

**Meet the Professor & Meet the Scientist**
Discover insights from experts on treating a variety of endocrine conditions and emerging science in the field of endocrinology, and learn the latest in patient care and scientific research.

ENDO’s comprehensive program provides attendees the opportunity to learn about the latest developments in hormone science and medicine from renowned investigators, expert clinicians, and educators from all over the world. 

Background: Obesity is associated with relative growth hormone (GH) deficiency and increased fracture risk. We hypothesized that GH administration would improve bone endpoints in individuals with overweight/obesity.
Methods: 77 adults ages 18-65 years, BMI ≥25 kg/m², and BMD T- or Z-score ≤ -1.0 were randomized in a double-blind protocol to daily subcutaneous GH or placebo for 18 months, targeting IGF-1 in the upper quartile of the age-appropriate normal range. There was a post-treatment observation period from 18-24 months. DXA and high-resolution peripheral quantitative CT were performed at baseline, 18 months and 24 months. Volumetric quantitative CT was performed at baseline and 18 months. Results are reported as mean ±SD or mean (95% confidence interval).
Results: There were no pretreatment differences between the GH (n=39) and placebo groups (n=38), including mean age (48±12y), BMI (33.1±5.7kg/m²) and BMD at any site. Forty-nine subjects (47% female) completed 18 months. P1NP, osteocalcin and CTX increased (p<0.005) and visceral adipose tissue decreased (p=0.04) at 18 months in the GH vs placebo group. Hip and radius aBMD, spine and tibial vBMD, tibial cortical thickness, and radial and tibial failure load decreased at 18 months in the GH vs placebo group (p<0.05). During the post-treatment observation period (18 to 24 months), total radius aBMD and tibia cortical thickness increased in the GH vs placebo group (p<0.05); there was also a trend toward an increase in total hip aBMD in the GH vs placebo group (p=0.06). At 24 months, none of the differences between the GH and placebo groups remained significant. There was a higher incidence of numbness and tingling (33% vs 8%, p=0.01) and joint pain or stiffness (33% vs 5%, p=0.003) in the GH vs placebo group. There were no other differences in adverse events between groups.
Conclusions: We demonstrated that GH administration for 18 months to individuals with overweight/obesity and low BMD decreased some measures of BMD, bone microarchitecture, and bone strength compared with placebo. None of these differences remained significant after 6 months off therapy. A longer duration of treatment, or a longer duration of observation post-treatment, may be necessary to see the expected biphasic decline and then increase in BMD reflecting an expanding remodeling space followed by mineralization that has previously been seen with GH administration in other populations, including individuals with and without GH deficiency. Although future investigation of the effects of GH on bone is required to assess the true long-term impact on skeletal integrity as well as fracture reduction, our study suggests that GH administration for 18 months to adults with overweight/obesity does not improve BMD, bone microarchitecture, or bone strength.

technical paper

Osteoporosis is a common systemic skeletal disease that predominantly affects people older than 50 years and often co-occurs with dementia. Studies have been conducted to find out the relation between the two, but this is not well studied in the Vietnamese population. This study aimed to analyze the impact of osteoporosis on the risk of dementia in Vietnamese immigrants.
We identified 38(female(F) 26, male(M) 12) community-dwelling Vietnamese patients aged ≥ 55 seen at the cognitive assessment clinic in a community health center 1/2021-8/2021 through chart review. Because either DEXA was not performed or the results were unavailable, 23 patients (F 12, M 11) were excluded. We assigned the patients with normal cognitive tests results or a diagnosis of mild cognitive impairment to the control group and those diagnosed with dementia to the study group.
Among 15 patients, 10(F 9, M 1) patients were diagnosed with dementia. Seven patients (F 6, M 1) had osteoporosis. Five patients (F 5) were assigned to the control group, and two patients had osteoporosis. (OR 3.5000, P = 0.2736)
The odds of developing dementia were 3.5 higher given osteoporosis diagnosis than with no osteoporosis. These results suggested a positive association between osteoporosis and dementia in Vietnamese immigrants. More studies with a larger number of patients in this cohort are needed to investigate this further.

Osteoporosis Likely Increases the Risk of Dementia in Vietnamese Immigrants

While anorexia nervosa is associated with impaired skeletal integrity, less is known about the skeletal effects of atypical anorexia nervosa, in which psychological criteria for anorexia nervosa are met, but affected individuals are not low weight. Mean bone mineral density (BMD) is higher in atypical anorexia nervosa than in low-weight anorexia nervosa but lower than in healthy controls. However, it is unknown whether bone microarchitecture and strength are affected. We hypothesized that bone microarchitecture and estimated strength would be impaired in women with atypical anorexia nervosa.
This was a cross-sectional study of women ages 21-46 years (n=55): n=28 with atypical anorexia nervosa (body mass index (BMI) >18.5 kg/m²), n=27 healthy, normal weight, eumenorrheic controls. Exclusion criteria included use of oral contraceptives. Areal BMD (aBMD) was assessed by DXA. Volumetric BMD (vBMD), microarchitecture, and failure load (a bone strength estimate) at the distal tibia and radius were assessed by high-resolution peripheral quantitative CT.
Median(IQR) BMI was lower [19.4(18.6,20.2) vs 22.2(21.5,23.0), p<0.0001] and median serum 25OH vitamin D level was higher [31(24,39) vs 22(17,25), p=0.0001] in atypical anorexia nervosa than healthy controls. In the atypical anorexia nervosa group, 89% had a history of low weight, 21% had a history of overweight/obesity, 31% had current amenorrhea, and 88% had a history of amenorrhea; median duration of anorexia nervosa was 11(5,14) years.
Median lateral spine, total hip, femoral neck, and total radius aBMD Z-scores were lower in atypical anorexia nervosa than healthy controls [lateral spine: -1.1(-2.0,-0.1) vs -0.4(-0.7,0.4), total hip: -0.8(-1.3,0.2) vs 0.2(-0.4,0.7), femoral neck: -0.9(-1.4,0.1) vs -0.1(-0.9,0.6), radius: -0.2(-0.9,0.3) vs 0.1(-0.4,0.6); p≤0.04 for all]. At the tibia, median total, cortical, and trabecular vBMD; cortical thickness; trabecular bone volume fraction; and failure load were lower in atypical anorexia nervosa than healthy controls (p<0.05). At the radius, median trabecular number was lower and trabecular separation was higher in atypical anorexia nervosa than healthy controls (p≤0.04), but there was no difference in failure load between the groups. After controlling for baseline BMI, differences at the radius but not tibia remained significant. At the tibia and radius, median total vBMD, cortical vBMD, and cortical thickness were lower in atypical anorexia nervosa subjects with amenorrhea compared to healthy controls and to atypical anorexia nervosa subjects with eumenorrhea (p≤0.04).
Conclusions: We demonstrate that, despite normal weight, women with atypical anorexia nervosa have impaired vBMD, microarchitecture, and estimated strength compared to healthy controls, with differences more pronounced at the weight-bearing tibia vs non-weight-bearing radius. Individuals with amenorrhea had additional impairments in the non-weight-bearing radius, suggesting an effect of systemic estrogen deficiency. Our data suggest that current normal weight is not protective against impaired bone structure and strength in atypical anorexia nervosa.

Impairments in volumetric bone mineral density, bone microarchitecture, and estimated strength in women with atypical anorexia nervosa

Background: Adrenocortical cancer (ACC) is a rare endocrine malignancy frequently diagnosed at an advanced stage when prognosis is dismal. Mitotane, the only approved therapy for locally advanced or metastatic disease, is minimally effective, and recent clinical trials with multi-kinase inhibitors or immunotherapies have been disappointing. OR-449 is a potent, selective, and orally bioavailable small molecule antagonist to steroidogenic factor-1 (SF-1 or NR5A1), a nuclear receptor and a transcription factor essential for the growth and development of the adrenal gland. SF-1 was recently described as a candidate "master transcription factor" in adult ACC (1). We previously reported that OR-449, dosed orally at 30 mg/kg for 28 days, completely blocked the growth of SJ-ACC3, a pediatric ACC patient-derived tumor xenograft (PDX), in immunocompromised mice. To help identify biomarkers for following the action of OR-449 in patient tumors, we evaluated a second pediatric ACC PDX, SW1939, which has high SF-1 expression and responded to OR-449 (10, 30 or 100 mg/kg) with inhibition of tumor growth and improved event-free survival over 24 days of dosing (an event is a 4-fold increase in tumor volume). Methods: We first measured circulating steroids, steroid precursors and steroid sulfates in SW1939 tumor-bearing mice with or without OR-449 treatment using liquid chromatography/tandem mass spectrometry. Second, we investigated common pathways of gene regulation by OR-449 in SW1939 and SJ-ACC3 tumors by RNAseq after seven days of dosing (100 mg/kg or 30 mg/kg, respectively). Results: Cortisol, DHEAS, steroid precursors (11-deoxycortisol, 17OH-progesterone, 17OH-pregnenolone) and sulfated Δ5 steroid precursors (pregnenolone sulfate, 17OH-pregnenolone sulfate, androstenediol-sulfate) were elevated in serum from SW1939 tumor-bearing mice compared to CD-1 non tumor-bearing mice, consistent with tumor-derived origin. Moreover, DHEAS, pregnenolone sulfate, 17OH-pregnenolone sulfate and androstenediol-sulfate were significantly suppressed (12-fold, 7.6-fold, 10.6-fold and 4.4-fold, respectively) following administration of OR-449 (100 mg/kg/day for 24 days) in SW1939 tumor-bearing mice. Final tumor weights were ~2-fold lower than controls, indicating that circulating steroid reduction was disproportionately greater than the change in tumor volume. Global gene expression was significantly altered following 7-day exposure to OR-449 in both tumors. Significantly, PAPSS2 and SULT2A1 within the sulfation pathway were down-regulated in both SW1939 (2.3-fold and 1.2-fold, respectively) and SJ-ACC3 (1.6-fold and 5-fold, respectively). Conclusions: OR-449 reduces steroid production, alters gene expression, and suppresses growth of two PDX models of ACC in mice. Tumor gene expression and steroid regulation by OR-449 are currently under investigation in other pediatric and adult ACC PDX models to evaluate these endpoints as potential biomarkers of SF-1 receptor engagement for initial clinical trials of OR-449 in ACC. Reference: (1) Corces et al., Science. 2018 Oct 26;362(6413): eaav1898; Reddy et al., Sci Adv. 2021 Nov 26;7(48): eabf6123.

Downstream Targets of the Steroidogenic Factor-1 (SF-1) Antagonist OR-449 in PDX Models of ACC

Adrenocortical cancer (ACC) is a rare and aggressive cancer (0.5-2 cases/ million/ year) with a poor 5-year survival (<40%). Most patients inevitably succumb to the wide-spread metastasis because of the lack of effective systemic treatment options or to complications from uncontrolled hypercortisolism. Therefore, it is critically important to identify new effective treatments that can be readily used in a clinical trial. In this direction, we identified a potent synergistic combination of Heat Shock Protein 90 (HSP90) and PI3K inhibitors via quantitative high-throughput drug screening (qHTS) for ACC, using a pharmaceutical library comprised of ~5000 drugs (FDA approved or investigational), and evaluation of drug synergy by a computerized drug combination matrix analysis. The synergistic efficacy of HSP90 inhibitor STA9090 and PI3K inhibitor, PIK75 was validated in vitro, in ACC cell lines H295R and SW13, by proliferation assay, which also determined the most efficacious doses of individual and combinatorial drugs. The drug combination significantly induced apoptosis and disintegrated the 3D-ACC spheroids as compared to the individual drugs, with a simultaneous upregulation of apoptotic protein markers (cleaved-Caspase3, cleaved-PARP), inhibition of the phosphorylation of PI3K pathway members (AKT1, mTOR, S6K, 4EB1 and GSK3α/β), and alteration in the G2/M phase of the cell cycle, in ACC cells. The synergetic effect of the drug combination was also effective in reducing the metastatic potential as revealed by invasion/migration assay, which was confirmed by the downregulation of the mesenchymal protein (Vimentin, N-cadherin, SNAIL and Zeb1) markers. Consistent with our data, observations from the gene expression data from The Cancer Genome Analysis (TCGA) & Gene Expression Omnibus (GEO) databases, revealed significant mRNA overexpression of HSP90AA1, HSP90AB1 HSP90B1 and its clients AKT2, CDK1, CDK4, NR3C1 indicating both HSP90 and PI3K/AKT pathways are highly activated in ACC cohorts. Overexpression and a positive correlation of mesenchymal markers TWIST1, ZEB1, VIM with HSP90AB1 and PI3KCA, in GEO and TCGA respectively, was consistent with the invasive potential of the ACC cells. In conclusion, our studies on the combination of HSP90 and PI3K inhibitors demonstrated a promising preliminary synergistic efficacy by inhibiting proliferation and epithelial-to-mesenchymal transition of ACC. Our findings can lead to development of an efficient mechanism-specific novel combination therapy that can be expedited to clinical trial in advanced ACC patients.

Synergistic Combination of HSP90 and PI3K inhibitors in Adrenocortical Cancer

Hepatocellular carcinoma (HCC) is the fifth most common cancer worldwide with a 18% 5-year survival rate. Mice lacking the splicing factor SRSF3 in hepatocytes (SKO mice) overexpress IGF2 and are predisposed to developing HCC with age. Loss of Igf2 in the SKO background prevented hepatic fibrosis and inflammation, and completely prevented tumor formation. This was associated with decreased proliferation, apoptosis and DNA damage, and restored DNA repair enzyme expression. Mechanistically, IGF2 treatment of HepG2 cells in vitro caused DNA damage and decreased DNA repair enzyme expression, and tumors from the SKO mice show mutational signatures consistent with double strand break and defective mismatch repair. Looking at human data, HCC patients with high IGF2 mRNA expression had worse survival compared to patients with normal IGF2 expression. The patients also showed a switch in IGF2 promoter usage that correlated with increased expression. HCC patients having high SRSF3 mRNA expression also showed poor survival as did patients with alterations in known SRSF3-dependent splicing events. The level of SRSF3 protein was decreased 6-fold in human HCC tissues compared with normal liver tissues. The results indicate that IGF2 overexpression in conjunction with reduced SRSF3 splicing activity could be a major cause of DNA damage and driver of liver cancer.

Hepatocyte Deletion of IGF2 Prevents DNA Damage and Tumor Formation in Hepatocellular Carcinoma

Introduction: MEN2 is a rare Autosomal Dominant disorder resulting from mutations in the RET proto-oncogene. MEN2 is classified into two distinct syndromes: MEN2A and MEN2B. MEN2A is a syndrome that presents with Medullary Thyroid Carcinoma (MTC) in 90% of adult gene carriers, unilateral or bilateral pheochormocytoma in 50%, and multigland parathyroid tumors in 20-30% of affected individuals. Other rare variants of MEN2 include Familial Medullary Thyroid Carcinoma (FMTC), MEN2A with cutaneous lichen amyloidosis, and MEN2A or FMTC with Hirschprung's disease. We present a patient with incidentally noted elevated calcitonin levels, later diagnosed with MEN2A.Clinical Case: 37-year-old Caucasian male was referred to our clinic for elevated calcitonin levels noted on lab work done as part of evaluation and management for weight loss prior to initiating GLP-1 agonists. He was diagnosed with hypothyroidism and multinodular goiter and started on Synthroid. His only symptoms were weight gain, tiredness, soft stools and facial flushing He denied any family history of endocrine disorders. Physical exam was unremarkable. Pertinent labs included serum calcitonin 93 pg/mL (<10 pg/mL), serum CEAg 5.2 ng/mL (0-3 ng/mL), and work up for pheochromocytoma and hyperparathyroidism was negative. USG thyroid showed a left lobe thyroid nodule measuring 7x5x7 mm with macrocalcifications, a right lobe thyroid nodule measuring 8x5x10mm, and an abnormal left lateral level III LN. He underwent left thyroid lobectomy with level VI neck dissection (total thyroidectomy aborted due to hypoxia), and subsequently completion thyroidectomy with right central neck dissection. Pathology showed metastatic MTC with pathologic staging pT1aN1a. Genetic testing showed RET c. 1826G>A (p. C609Y) which is ATA – MOD risk. Patients' father was also genetically screened and diagnosed with MEN2A and noted to have elevated calcitonin levels. He also subsequently underwent total thyroidectomy, which revealed medullary thyroid microcarcinoma.Conclusion: A number of studies support that measurement of serum calcitonin is the most sensitive screening test for detecting occult MTC in individuals with thyroid nodules. Yet, the use of serum calcitonin in the routine evaluation of thyroid nodules is controversial due to absence of uniform calcitonin thresholds, high false positive values and unavailability of pentagastrin stimulation testing. Moreover, there are no recommendations based on the current data to check calcitonin levels prior to initiating GLP-1 agonists but their use is not recommended in patients with personal or family history of MTC/MEN2. Based on the above case, measurement of calcitonin levels should be a part of the work up in patients who present with thyroid nodules and are receiving GLP-1 agonists. Attention should also be paid to the importance of genetic counseling in first-degree relatives of patients with MEN2A. This allows for timely diagnosis and reduces morbidity and mortality.

An Uncommon Path Leading to Diagnosis of Multiple Endocrine Neoplasia 2A

BackgroundAlpelisib is an oral α-specific phosphatidylinositol 3-kinase (PI3K) inhibitor use in combination with fulvestrant to treat postmenopausal women with HR+/HER2−, PIK3CA-mutated, advanced or metastatic breast cancer that has acquired resistance to endocrine-based therapy. (1)Alpelisib interferes with the PI3K/Akt signalling pathway resulting in impaired peripheral glucose uptake, increased liver glycogenolysis, loss of beta-cell mass and insulin secretion dysfunction(2). Hyperglycemia is a frequent adverse effect of alpelisib but diabetic ketoacidosis (DKA) is considered a rare occurrence. We describe a patient without a previous history of diabetes who developed DKA after 2 months on alpelisib.Clinical caseA 81 year-old woman with metastatic ER+ PR – Her2 - breast cancer, presented with a 1 week history of nausea, vomiting, and polyuria. Her hemoglobin A₁C was 5.5 % on two separate occasions last year. She had started alpelisib at 300 mg/day 7 weeks prior to presentation. She presented with a blood glucose (BG) of 659 mg/dL, anion gap of 21, serum bicarbonate 17 mmol/L, beta-hydroxybutyrate 3.82 mmol/L (normal < 0.27 mmol/L), serum osmolarity 319 mOsm/kg, serum creatinine 2.83 mg/dL (baseline 1.38 mg/dL), C-peptide 4.3 ng/mL (normal 1.1 – 4.4 ng/mL), negative GAD-65 antibodies and Islet Antigen 2 antibodies, septic workup were non-revealing, leading to the diagnosis of alpelisib-associated DKA. Alpelisib was held, and she was treated with intravenous insulin and hydration. DKA resolved in 12 hours, however, she had persistent hyperglycemia. She was started with insulin regimen of 0.2 units/kg and discharged with Humalog 75/25 5 units twice daily.Conclusion:Patients with no pre-existing history of diabetes mellitus can also be at risk for DKA which may develop within weeks to months of initiation of alpelisib. Risk factors for development of DKA are yet to be identified, but would be useful to help tailor frequency of BG monitoring. This warrants further research. The hyperglycemic effects of alpelisib appear to be reversible upon drug discontinuation, however when DKA is the presenting syndrome, insulin therapy is indicated.Reference:
André F, Ciruelos E, Rubovszky G, Campone M, Loibl S, Rugo HS, Iwata H, Conte P, Mayer IA, Kaufman B, Yamashita T, Lu YS, Inoue K, Takahashi M, Pápai Z, Longin AS, Mills D, Wilke C, Hirawat S, Juric D; SOLAR-1 Study Group. Alpelisib for PIK3CA-Mutated, Hormone Receptor-Positive Advanced Breast Cancer. N Engl J Med. 2019 May 16;380(20): 1929-1940. doi: 10.1056/NEJMoa1813904. PMID: 31091374.
Nguyen P, Musa A, Samantray J. Alpelisib-Induced Diabetic Ketoacidosis. Cureus. 2021 May 1;13(5): e14796. doi: 10.7759/cureus.14796. PMID: 34084688; PMCID: PMC8166359.

Alpelisib-induced Diabetic Ketoacidosis

Background: Prednisolone and prednisone have a longer plasma elimination half-life after oral administration than hydrocortisone: 2.1 to 3.5 vs ~1.5hrs1,2. For this reason, prednis(ol)one has been used in Congenital Adrenal Hyperplasia (CAH) by giving a dose in the evening to try to prevent the overnight rise in adrenal androgens. Modified-release hydrocortisone (MRHC) capsules, (Efmody, Diurnal Ltd, Cardiff UK), replicate the cortisol diurnal rhythm and improve the control of CAH compared to standard glucocorticoid therapy³. This post-hoc sub-analysis examines CAH control in MRHC treated patients switched from prednis(ol)one.
Methods: We reviewed the data of all patients taking prednis(ol)one in the randomised study of standard treatment versus MRHC³: 39 classic CAH patients on prednis(ol)one (alone or combined with hydrocortisone) (36 prednisolone; 3 prednisone) were randomised either to continue prednis(ol)one or switched to MRHC at the same hydrocortisone dose equivalent (HDE=prednisolone dose x5). Patients were assessed after 4 weeks following which blinded dose titration according to 17OHP and A4 control was performed to bring 17OHP into the optimal range (<36 nmol/l) and A4 into the reference range. After 24 weeks, 31 patients from the prednis(ol)one prior therapy group participated in an ongoing MHRC single arm extension study with 28 patients completing 18 months follow up. Control of CAH was defined as a 0900h 17OHP <36 nmol/l.
Results: Median baseline dose (HDE) was 30mg (n=39), androgen control was 56%. In patients randomised to MRHC (n=18), 39% were controlled at baseline and 94% at 4 weeks without dose adjustment.  At 24 weeks, after androgen-control guided titration, the HDE dose in the prednis(ol)one group was 34mg, and in the MRHC group 27.5mg, with control being 71% and 94%, respectively.  Percentage inhibition of 9am 17OHP from the levels at baseline to that at 24 weeks in the prednis(ol)one group was 32% and in the MRHC group 91%. In this study period there were no adrenal crises in the MRHC group and one in the prednis(ol)one group. MRHC-treated patients in the extension study were further titrated according to clinician assessment, at interim analysis the median MRHC dose was 20mg (median reduction 10mg) and 82% of patients were controlled at 18 months (n=28). In the ongoing extension study of all patients on MRHC (221 patient years), there were 12 adrenal crises in 5 patients (5.4/100 patient years).
Conclusions: Control of CAH is better on MRHC than prednisolone: 94% vs 39%; and the dose of MRHC can be down titrated to an adrenal replacement dose whilst maintaining control in the majority (82%) of patients.
References: 1. Pickup ME. Clin Pharmacokinet 1979 4 111-128; 2. Toothaker RD. J Pharm Sci 1982 71 573-576; 3. Merke DP. JCEM 2021 106 e2063-e2077.

Comparison of prednisolone versus modified-release hydrocortisone (Efmody) in the treatment of Congenital Adrenal Hyperplasia (CAH)

Background: Traditionally, stimulated serum cortisol < 18 mcg/dL at 30 or 60 minutes has been used as the cutoff for diagnosis of adrenal insufficiency (AI) during high dose cosyntropin stimulation testing (CST). Recent studies suggest that a cutoff of 14-15 mcg/dL is more accurate when using more specific monoclonal immunoassays (IAs). In February 2017, our institution switched from a polyclonal IA to a monoclonal IA. Despite this change, providers were diagnosing AI based on the 18 mcg/dL cutoff. Long term glucocorticoid use has several unwanted pleiotropic effects such as impaired glucose tolerance or diabetes mellitus (DM), hypertension (HTN), and increased risk of infection. Our study aims to evaluate patients with peak stimulated cortisol levels between 14-18 mcg/dL diagnosed with AI and placed on steroids.
Methods: We retrospectively reviewed charts of patients with peak cortisol levels 14-18 mcg/dL at 30 or 60 minutes on high dose CST with 250 mcg cosyntropin between February 2017 and August 2021. Cortisol levels were assessed using the monoclonal IA Roche Elecsys Cortisol II. Data regarding type and etiology of AI as well as patient demographics, comorbidities, steroid regimen, and follow up cortisol testing was collected. Worsening HTN and DM were defined as increase in blood pressure and HgbA1c respectively and/or intensification of medications between baseline at time of CST and last follow up while on steroids.
Results: 41 patients met inclusion criteria. 29 (71%) patients were female and mean age at CST was 52 years (range 21-86). Most patients were diagnosed with secondary (71%) or partial secondary (19%) AI by provider. Most common etiologies were pituitary disease (45%), chronic steroid use (24%), and unilateral adrenalectomy (19%). Mean follow up was 23 months (range 0.5-57). 33 (80%) patients were started or continued on glucocorticoid replacement. Remaining patients who were never started on steroids had a peak cortisol ≥ 15.6 mcg/dL. 21/33 (64%) of patients started on steroids had repeat adrenal function testing a mean of 18 months (range 2-42) after the initial CST. Based on testing or clinical judgement, 19/33 (58%) were taken off steroids. In patients treated with steroids, 64% developed weight gain, 42% worsening HTN, and 6% worsening DM. Additionally, 48% developed an infection, 24% insomnia, and 15% psychiatric illness.
Conclusions: The majority of patients with peak stimulated cortisol between 14-18 mcg/dL on high dose CST had secondary AI. Over 50% of patients started on steroids were later able to stop. Steroid-related complications were observed, but this may not differ significantly from the general population. This study underscores the importance of interpreting CST results in the context of the cortisol assay used and evaluating patients with secondary AI for recovery of the hypothalamic-pituitary-adrenal axis.

Diagnosis of Adrenal Insufficiency Based on Peak Stimulated Cortisol Levels Between 14 and 18 mcg/dL on High Dose Cosyntropin Stimulation Testing

Background: Conventional management of adrenal insufficiency (AI) includes lifelong oral glucocorticoid replacement therapy. Currently, no glucocorticoid regimens adequately mimic the circadian rhythm of cortisol secretion. In some patients, this causes persistence of severe symptoms. Continuous subcutaneous hydrocortisone infusion (CSHI) is an alternative delivery method using an insulin pump. Previous studies have confirmed CSHI's potential to re-establish the diurnal cortisol profile and reduce total daily dose (TDD) of hydrocortisone. To date no reports are available regarding the long-term usage (>2 years) of CSHI in adults.
Methods: We report the use of CSHI in 27 patients seen at the Scottsdale Endocrinology Institute from 05/2012 to present. CSHI inclusion criteria were persistence of severe symptoms, high steroid dosage, or gastrointestinal intolerance, malabsorption or bleeding in willing and able patients. Individual basal rates were set using a novel method to re-establish patients' diurnal cortisol profiles. Patients were educated on pump basics including bolusing and temporary basal rates, allowing them to control their dosing during symptomatic and stressful periods and procedures, and using subcutaneous shots during pump failures. Quality of life (QOL) was assessed using the AddiQOL questionnaire periodically. Data was gathered from patient charts and surveys. We report patient preference of CSHI over oral therapy, and changes in QOL, TDD of hydrocortisone, and crises during pump therapy.
Results: In our patient sample, there were 2 males and 25 females, 9 had primary AI, 15 had secondary AI, and 3 had steroid-induced AI. Ages ranged from 26 to 78 years. 1 patient had 1 year of CSHI, 19 patients had 2-5 years of CSHI, and 7 patients had >5 years of CSHI. After at least 2 years of CSHI, 24/26 patients preferred CSHI over oral therapy, 25/26 patients continued to report improved symptoms and QOL, and average TDD reduction of hydrocortisone was 22 mg (2.5-55.8). 4 patients previously deemed disabled returned to a productive lifestyle. 2 patients underwent successful pregnancies without untoward events. Only 2 patients were hospitalized due to near adrenal crises. 4 chose to discontinue CSHI, 2 for a high out of pocket expense, and 2 for local skin reactions at infusion sites.
Conclusion: Our method of calculating basal rates and implementing CSHI was associated with improvement in symptoms and QOL and reduced TDD of hydrocortisone and hospitalizations over treatment duration. We expect this to reduce cumulative side effects of steroids and overall cost of treatment of these patients. Autonomy of dose regulation offered by pump therapy improves patient's ability to handle stressful situations and symptoms, including sleep quality and quantity. In summary, we found CSHI to be a safe and effective method to treat patients with AI experiencing problems with oral treatment over an extended period of time.

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